* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg-950: #050a13;
  --bg-900: #0B1120;
  --bg-800: #111827;
  --bg-700: #1a2332;
  --panel: #0f172a;
  --panel-soft: #16253d;
  --card: #0f172a;
  --line: rgba(148, 163, 184, 0.12);
  --line-strong: rgba(148, 163, 184, 0.2);
  --text: #edf4ff;
  --muted: #b9c5d9;
  --primary: #5bb3ff;
  --primary-strong: #3d8eff;
  --teal: #6de0d0;
  --amber: #f3c37a;
  --gold: #f6d37d;
  --success: #6ce3a6;
  --danger: #ff756f;
  --purple: #b7a5ff;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', 'Segoe UI', sans-serif;
  background: var(--bg-900);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  box-shadow: none;
}

img, video {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

button, input {
  font: inherit;
}

.container {
  width: min(1200px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header,
.dashboard-header {
  background: rgba(11, 17, 32, 0.95);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(8px);
}

.topbar,
.dashboard-topbar {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 16px;
  min-height: 64px;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
  transition: opacity 0.2s ease;
}

.header-logo:hover {
  opacity: 0.85;
}

.brand-mark-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text);
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--line-strong);
  font-size: 1.1rem;
}

.brand-text {
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 6px;
}

.header-center {
  text-align: center;
}

.header-center h2 {
  margin: 0;
  line-height: 1.2;
}

.top-links,
.dashboard-actions {
  display: flex;
  align-items: center;
  gap: 18px;
}

.top-links a,
.nav-link {
  color: var(--muted);
  transition: color 0.2s ease;
}

.top-links a:hover,
.nav-link:hover {
  color: var(--text);
}

.top-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.mobile-menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: none;
  background: rgba(255,255,255,0.04);
  border-radius: 10px;
  color: var(--text);
  font-size: 1.2rem;
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease;
}

.mobile-menu-toggle:hover {
  background: rgba(255,255,255,0.08);
  color: var(--primary);
}

@media (max-width: 640px) {
  .mobile-menu-toggle {
    display: flex;
  }
}

.dashboard-search {
  position: relative;
  max-width: 480px;
  width: 100%;
  margin: 0 auto;
}

.dashboard-search i {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--muted);
  font-size: 0.85rem;
  pointer-events: none;
}

.dashboard-search input {
  width: 100%;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.65rem 2.5rem 0.65rem 2.5rem;
  color: var(--text);
  font-size: 0.9rem;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.dashboard-search input:focus {
  outline: none;
  background: rgba(255,255,255,0.06);
  border-color: rgba(148, 163, 184, 0.28);
}

.search-clear {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  background: transparent;
  border: none;
  color: var(--muted);
  cursor: pointer;
  font-size: 0.85rem;
  padding: 4px;
  line-height: 1;
}

.search-clear:hover {
  color: var(--text);
}

.header-icon-btn {
  display: inline-grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 999px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease;
}

.header-icon-btn:hover {
  background: rgba(255,255,255,0.06);
  color: var(--text);
}

.header-avatar {
  display: inline-grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: rgba(255,255,255,0.04);
  color: var(--muted);
  text-decoration: none;
  transition: background 0.2s ease, color 0.2s ease;
}

.header-avatar:hover {
  background: rgba(255,255,255,0.08);
  color: var(--text);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid transparent;
  border-radius: 12px;
  padding: 0.8rem 1.2rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.2s ease, opacity 0.2s ease, border-color 0.2s ease;
  box-shadow: none;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--teal) 100%);
  color: #07111d;
}

.btn-light {
  background: linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0.02));
  color: var(--text);
  border-color: var(--line-strong);
}

.btn-block {
  width: 100%;
}

.btn-small {
  padding: 0.7rem 1rem;
  border-radius: 10px;
}

.hero {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  align-items: center;
  gap: 30px;
  padding: 88px 0 54px;
}

.hero-copy {
  max-width: 650px;
}

.eyebrow {
  display: inline-block;
  color: var(--teal);
  background: rgba(109, 224, 208, 0.08);
  border: 1px solid rgba(109, 224, 208, 0.12);
  border-radius: 999px;
  padding: 0.42rem 0.7rem;
  font-size: 0.72rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  margin-bottom: 18px;
}

.hero-copy h1,
.section-header h2,
.feed-header h2,
.section-head h2,
.profile-card h1,
.auth-brand h2 {
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.12;
}

.hero-copy h1 {
  font-size: clamp(2.6rem, 4vw, 4.5rem);
  margin-bottom: 18px;
}

.hero-copy p,
.widget-copy,
.feature-card p,
.timeline-step p,
.panel-box p {
  color: var(--muted);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin: 26px 0 30px;
}

.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.hero-stats div {
  min-width: 140px;
}

.hero-stats strong {
  display: block;
  font-size: 1.7rem;
  font-weight: 800;
  color: var(--text);
}

.hero-stats span {
  color: var(--muted);
  font-size: 0.82rem;
}

.hero-panel {
  display: flex;
  justify-content: center;
}

.panel-window {
  width: min(100%, 420px);
  background: linear-gradient(180deg, rgba(17, 29, 50, 0.96), rgba(12, 19, 31, 0.98));
  border: 1px solid var(--line);
  border-radius: 20px;
  overflow: hidden;
}

.window-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
  background: rgba(255,255,255,0.02);
}

.window-header span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--danger);
}

.window-header span:nth-child(2) {
  background: var(--amber);
}

.window-header span:nth-child(3) {
  background: var(--success);
}

.window-body {
  padding: 22px 20px;
  display: grid;
  gap: 18px;
}

.signal-item {
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255,255,255,0.02);
}

.signal-item label {
  display: block;
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 6px;
}

.signal-item strong {
  font-size: 1rem;
}

.signal-success {
  border-color: rgba(108, 227, 166, 0.35);
  background: linear-gradient(135deg, rgba(108, 227, 166, 0.08), rgba(91, 179, 255, 0.04));
}

.feature-section,
.workflow,
.panel-strip {
  padding: 36px 0 10px;
}

.section-header {
  margin-bottom: 24px;
}

.section-header h2 {
  font-size: clamp(2rem, 3vw, 3rem);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.feature-card,
.widget-card,
.challenge-card,
.profile-card,
.auth-card,
.panel-box,
.timeline-step {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: none;
  backdrop-filter: blur(10px);
}

.feature-card {
  padding: 22px;
}

.feature-icon {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(91, 179, 255, 0.12), rgba(109, 224, 208, 0.12));
  border: 1px solid rgba(91, 179, 255, 0.25);
  color: var(--primary);
  font-size: 1.3rem;
  margin-bottom: 18px;
}

.feature-card h3,
.widget-title,
.timeline-step h3 {
  margin-bottom: 10px;
  font-weight: 700;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.timeline-step {
  padding: 22px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.step-count {
  display: inline-grid;
  place-items: center;
  min-width: 50px;
  height: 50px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(91, 179, 255, 0.18), rgba(109, 224, 208, 0.12));
  border: 1px solid rgba(91, 179, 255, 0.2);
  color: var(--primary);
  font-weight: 800;
}

.panel-box {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
  padding: 30px 26px;
}

.site-footer {
  padding: 42px 0 70px;
  border-top: 1px solid var(--line);
  position: relative;
  z-index: 1;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  color: var(--muted);
  flex-wrap: wrap;
}

.footer-links {
  display: flex;
  gap: 18px;
}

.footer-links a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9rem;
}

.footer-links a:hover {
  color: var(--teal);
  text-decoration: underline;
}

.dashboard-grid {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 24px;
  width: 100%;
}

.feed-column,
.sidebar-column {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.feed-column {
  min-width: 0;
}

.sidebar-column {
  min-width: 280px;
}

.challenge-feed {
  display: flex;
  flex-direction: column;
  gap: 12px;
  width: 100%;
}

.challenge-card {
  background: transparent;
  border: none;
  border-radius: 0;
  padding: 0;
  cursor: pointer;
  transition: background 0.15s ease;
  overflow: visible;
  width: 100%;
  border-bottom: 1px solid var(--line);
  padding-bottom: 16px;
}

.challenge-card:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.challenge-card:hover {
  background: rgba(255, 255, 255, 0.02);
}

.challenge-card .card-inner {
  padding: 0;
}

.card-header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

.card-meta-left {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.card-category-icon {
  width: 20px;
  height: 20px;
  border-radius: 4px;
  background: rgba(255,255,255,0.06);
  display: grid;
  place-items: center;
  color: var(--muted);
  font-size: 0.6rem;
  font-weight: 800;
}

.card-category-name {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--muted);
}

.card-time-ago {
  font-size: 0.8rem;
  color: var(--muted);
}

.card-category-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  font-size: 0.65rem;
  font-weight: 700;
  border: 1px solid transparent;
  color: var(--muted);
  background: rgba(255,255,255,0.04);
}

.card-meta-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-joined-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
  border: 1px solid var(--line-strong);
  color: var(--primary);
  background: rgba(91, 179, 255, 0.08);
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s ease;
}

.card-joined-pill:hover {
  background: rgba(91, 179, 255, 0.14);
  border-color: rgba(91, 179, 255, 0.35);
}

.challenge-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: #f3f4f6;
  margin: 0 0 10px;
  line-height: 1.35;
  letter-spacing: -0.01em;
}

.challenge-media {
  background: #000000;
  border-radius: 8px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 180px;
  max-height: 520px;
  margin: 0 0 12px;
}

.challenge-media img,
.challenge-media video {
  width: 100%;
  max-height: 520px;
  object-fit: contain;
  display: block;
}

.challenge-description {
  color: #8b949e;
  font-size: 0.9rem;
  line-height: 1.5;
  margin-bottom: 12px;
}

.card-action-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.vote-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0.4rem 0.7rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 700;
  background: rgba(255, 255, 255, 0.04);
  color: #f3f4f6;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  user-select: none;
  transition: background 0.2s ease;
}

.vote-pill:hover {
  background: rgba(255, 255, 255, 0.08);
}

.vote-pill .vote-arrow {
  font-size: 0.85rem;
  color: #8b949e;
}

.vote-pill .vote-count {
  min-width: 18px;
  text-align: center;
}

.action-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 0.4rem 0.7rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
  background: rgba(255, 255, 255, 0.04);
  color: #8b949e;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.2s ease, color 0.2s ease;
}

.action-pill:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
}

.action-pill i {
  font-size: 0.8rem;
}

.challenge-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: #f3f4f6;
  margin: 10px 0;
  line-height: 1.35;
}

.challenge-meta-row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.challenge-media {
  background: #000000;
  border-radius: 12px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 180px;
  max-height: 520px;
  margin: 0 0 12px;
}

.challenge-media img,
.challenge-media video {
  width: 100%;
  max-height: 520px;
  object-fit: contain;
  display: block;
}

.media-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 28px 18px;
  color: #8b949e;
  font-size: 0.85rem;
}

.media-placeholder i {
  font-size: 1.8rem;
  opacity: 0.4;
}

.challenge-description {
  color: #8b949e;
  font-size: 0.92rem;
  line-height: 1.55;
  margin-bottom: 10px;
}

.challenge-stats {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.stat-group {
  display: flex;
  align-items: center;
  gap: 18px;
  color: #8b949e;
  font-size: 0.88rem;
}

.challenge-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  flex-wrap: wrap;
}

.solve-btn,
.submit-flag-btn,
.report-btn,
.delete-btn {
  border: none;
  border-radius: 12px;
  padding: 0.78rem 1rem;
  cursor: pointer;
  font-weight: 700;
}

.solve-btn,
.submit-flag-btn {
  background: linear-gradient(135deg, var(--primary) 0%, var(--teal) 100%);
  color: #07111d;
}

.report-btn {
  background: rgba(243, 195, 122, 0.12);
  border: 1px solid rgba(243, 195, 122, 0.26);
  color: var(--amber);
}

.delete-btn {
  background: rgba(255, 117, 111, 0.12);
  border: 1px solid rgba(255, 117, 111, 0.26);
  color: var(--danger);
}

.widget-card {
  padding: 16px;
  background: transparent;
  border: none;
  border-radius: 0;
}

.widget-title {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  color: var(--text);
  font-weight: 700;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.sidebar-widget {
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px;
}

.sidebar-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px;
  border-radius: 10px;
  background: transparent;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.sidebar-item:hover {
  background: rgba(255,255,255,0.04);
  border-color: var(--line);
}

.sidebar-item-thumb {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: #0b0e14;
  display: grid;
  place-items: center;
  overflow: hidden;
  flex-shrink: 0;
  color: var(--muted);
  font-size: 0.8rem;
}

.sidebar-item-body {
  flex: 1;
  min-width: 0;
}

.sidebar-item-title {
  font-size: 0.8rem;
  font-weight: 600;
  color: #f3f4f6;
  line-height: 1.3;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.sidebar-item-meta {
  font-size: 0.7rem;
  color: #8b949e;
  margin-top: 2px;
}

.mini-stat {
  padding: 12px 10px;
  border-radius: 12px;
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--line);
  text-align: center;
}

.mini-label {
  display: block;
  color: var(--muted);
  font-size: 0.72rem;
  margin-bottom: 8px;
}

.mini-stat strong {
  font-size: 1.2rem;
}

.leaderboard-list {
  display: grid;
  gap: 10px;
}

.leaderboard-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255,255,255,0.02);
}

.rank-badge {
  min-width: 30px;
  font-weight: 800;
  color: var(--primary);
}

.rank-badge.top3 {
  color: var(--amber);
}

.username {
  flex: 1;
  color: var(--text);
}

.points {
  color: var(--teal);
  font-weight: 700;
}

.modal {
  display: none;
  position: fixed;
  inset: 0;
  padding: 24px;
  background: rgba(3, 8, 16, 0.85);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  overflow-y: auto;
}

.modal.active {
  display: flex;
}

.modal-card {
  position: relative;
  width: min(820px, 100%);
  background: #0b0e14;
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 12px;
  padding: 0;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
  max-height: 90vh;
  overflow-y: auto;
}

.modal-card.large-card {
  width: min(900px, 100%);
}

.hint-modal-card {
  width: min(520px, 100%);
  padding: 28px;
}

.hint-modal-header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 20px;
}

.hint-modal-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(91, 179, 255, 0.18), rgba(109, 224, 208, 0.12));
  border: 1px solid rgba(91, 179, 255, 0.3);
  display: grid;
  place-items: center;
  font-size: 1.4rem;
  color: var(--primary);
  flex-shrink: 0;
}

.hint-modal-header h3 {
  margin: 4px 0 0;
  font-size: 1.25rem;
  font-weight: 700;
}

.hint-modal-header .eyebrow {
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 600;
}

.hint-modal-body {
  padding: 4px 0 20px;
}

.hint-modal-label {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 10px;
  font-weight: 600;
}

.hint-modal-text {
  padding: 16px 18px;
  background: linear-gradient(135deg, rgba(91, 179, 255, 0.06), rgba(109, 224, 208, 0.04));
  border: 1px solid var(--line);
  border-left: 3px solid var(--primary);
  border-radius: 10px;
  color: var(--text);
  font-size: 0.98rem;
  line-height: 1.65;
  white-space: pre-wrap;
}

.hint-modal-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.hint-modal-coins {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 0.9rem;
}

.hint-modal-coins i {
  color: #f59e0b;
}

.hint-modal-coins strong {
  color: var(--text);
  font-weight: 700;
}

/* ===== Profile Edit Modal ===== */
.profile-edit-form {
  padding: 4px 0 8px;
}

.profile-edit-form .form-header {
  margin-bottom: 24px;
}

.profile-edit-form .field-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 16px;
}

.profile-edit-form label {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.profile-edit-form label > span {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.profile-edit-form input,
.profile-edit-form textarea {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.8rem 1rem;
  color: var(--text);
  font-size: 0.95rem;
  transition: border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

.profile-edit-form input:focus,
.profile-edit-form textarea:focus {
  outline: none;
  border-color: var(--primary);
  background: rgba(91, 179, 255, 0.05);
  box-shadow: 0 0 0 3px rgba(91, 179, 255, 0.15);
}

.profile-edit-form input:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.profile-edit-form .form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.profile-edit-form .btn-small {
  padding: 0.7rem 1.2rem;
  border-radius: 10px;
}

@media (max-width: 640px) {
  .profile-edit-form .field-grid {
    grid-template-columns: 1fr;
  }
  .profile-edit-form .form-actions {
    flex-direction: column-reverse;
  }
  .profile-edit-form .form-actions .btn {
    width: 100%;
  }
}

.telegram-status {
  padding: 12px 14px;
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--line);
  border-radius: 10px;
  margin-bottom: 12px;
  font-size: 0.9rem;
  color: var(--muted);
}

.telegram-status.connected {
  border-color: rgba(16, 185, 129, 0.4);
  color: #10b981;
  background: rgba(16, 185, 129, 0.05);
}

.telegram-status .status-row {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
}

.telegram-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.modal-close {
  position: absolute;
  right: 14px;
  top: 14px;
  border: none;
  background: rgba(255, 255, 255, 0.06);
  color: var(--muted);
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  transition: background 0.2s ease, color 0.2s ease;
  z-index: 10;
}

.modal-close:hover {
  background: rgba(255, 255, 255, 0.12);
  color: var(--text);
}

.modal-card-inner {
  padding: 16px 20px 20px;
}

.modal-header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.modal-meta-left {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.modal-title {
  font-size: 1.15rem;
  font-weight: 600;
  color: #f3f4f6;
  margin: 0 0 14px;
  line-height: 1.35;
}

.modal-media {
  background: #000000;
  border-radius: 12px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 160px;
  max-height: 520px;
  margin-bottom: 14px;
}

.modal-media img,
.modal-media video {
  width: 100%;
  max-height: 520px;
  object-fit: contain;
  display: block;
}

.modal-section {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px 16px;
  margin-bottom: 12px;
}

.modal-section h4 {
  margin: 0 0 10px;
  color: var(--teal);
  font-size: 0.95rem;
  font-weight: 700;
}

.modal-description {
  color: #8b949e;
  font-size: 0.92rem;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-word;
}

.modal-meta-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 14px;
}

.modal-meta-card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px 14px;
}

.modal-meta-card .meta-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  display: block;
  margin-bottom: 6px;
}

.modal-meta-card strong {
  font-size: 0.95rem;
  color: #f3f4f6;
}

.modal-action-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 14px;
  flex-wrap: wrap;
}

.hint-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 12px;
  margin-top: 10px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.02);
}

.flag-submission {
  display: flex;
  gap: 10px;
  margin-top: 10px;
}

.flag-input {
  flex: 1;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--line);
  border-radius: 12px;
  color: var(--text);
  padding: 0.8rem 0.9rem;
}

.submit-flag-btn {
  border: none;
  border-radius: 12px;
  padding: 0.78rem 1rem;
  cursor: pointer;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary) 0%, var(--teal) 100%);
  color: #07111d;
}

.comments-section {
  margin-top: 8px;
}

.comments-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-height: 280px;
  overflow-y: auto;
  padding-right: 4px;
  margin-bottom: 14px;
}

.comment-form textarea {
  width: 100%;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--line);
  color: var(--text);
  border-radius: 12px;
  padding: 12px;
  resize: vertical;
  min-height: 70px;
  font-family: inherit;
}

.comment-form textarea:focus {
  outline: none;
  border-color: rgba(91, 179, 255, 0.5);
  background: rgba(91, 179, 255, 0.05);
}

.comment-form-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--muted);
}

.comment-login-prompt {
  background: rgba(91, 179, 255, 0.06);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px;
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
}

/* ===== Challenge Detail Page ===== */
.challenge-shell {
  padding-top: 32px;
  padding-bottom: 50px;
}

.challenge-detail-card {
  background: transparent;
  border: none;
  border-radius: 0;
  padding: 0;
  overflow: visible;
  margin-bottom: 18px;
}

.challenge-detail-extra {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* ===== 3-Dot Options Menu ===== */
.challenge-options-dropdown {
  position: relative;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 6px;
  background: #1a2332;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 10px;
  padding: 6px;
  min-width: 180px;
  z-index: 100;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 10px 12px;
  background: transparent;
  border: none;
  color: var(--text);
  font-size: 0.88rem;
  font-weight: 500;
  cursor: pointer;
  border-radius: 8px;
  transition: background 0.2s ease;
  text-align: left;
}

.dropdown-item:hover {
  background: rgba(255, 255, 255, 0.06);
}

.dropdown-item i {
  font-size: 0.85rem;
  color: var(--muted);
  width: 18px;
  text-align: center;
}

.dropdown-danger {
  color: var(--danger);
}

.dropdown-danger i {
  color: var(--danger);
}

.dropdown-danger:hover {
  background: rgba(255, 117, 111, 0.08);
}

/* ===== Reddit-style Comments Page ===== */
.comments-shell {
  padding-top: 32px;
  padding-bottom: 50px;
  max-width: 800px;
  margin: 0 auto;
}

.comments-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.comments-sort {
  display: flex;
  align-items: center;
  gap: 8px;
}

.sort-label {
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.sort-btn {
  background: transparent;
  border: none;
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 6px;
  transition: color 0.2s ease, background 0.2s ease;
}

.sort-btn:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.04);
}

.sort-btn.active {
  color: var(--primary);
}

.comments-count {
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 600;
}

.reddit-comments-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.reddit-comment {
  display: flex;
  gap: 8px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 16px;
  box-shadow: none;
  backdrop-filter: blur(10px);
}

.reddit-comment .vote-column {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  min-width: 32px;
}

.reddit-comment .vote-btn {
  background: transparent;
  border: none;
  color: var(--muted);
  font-size: 0.75rem;
  cursor: pointer;
  padding: 2px;
  line-height: 1;
  transition: color 0.2s ease;
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  border-radius: 4px;
}

.reddit-comment .vote-btn:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.04);
}

.reddit-comment .vote-btn.upvoted {
  color: var(--teal);
}

.reddit-comment .vote-btn.downvoted {
  color: var(--danger);
}

.reddit-comment .vote-count {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text);
  min-width: 24px;
  text-align: center;
}

.reddit-comment .comment-body-wrap {
  flex: 1;
  min-width: 0;
}

.reddit-comment .comment-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
  flex-wrap: wrap;
}

.reddit-comment .comment-avatar {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 0.65rem;
  font-weight: 700;
  flex-shrink: 0;
  letter-spacing: 0.02em;
}

.reddit-comment .comment-author {
  font-weight: 600;
  color: var(--primary);
  font-size: 0.85rem;
}

.reddit-comment .comment-badge {
  display: inline-flex;
  align-items: center;
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 0.68rem;
  font-weight: 700;
  background: rgba(91, 179, 255, 0.1);
  color: var(--primary);
  border: 1px solid rgba(91, 179, 255, 0.2);
}

.reddit-comment .comment-time {
  color: var(--muted);
  font-size: 0.75rem;
}

.reddit-comment .comment-text {
  color: var(--text);
  font-size: 0.92rem;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-word;
  margin-bottom: 8px;
}
.mention {
  color: #58a6ff;
  font-weight: 600;
  background: rgba(88,166,255,0.1);
  border-radius: 4px;
  padding: 0 3px;
}

.reddit-comment .comment-actions-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.reddit-comment .comment-action {
  background: transparent;
  border: none;
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 6px;
  transition: color 0.2s ease, background 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.reddit-comment .comment-action:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.04);
}

.reddit-comment .replies-thread {
  margin-top: 12px;
  padding-left: 20px;
  border-left: 2px solid rgba(255, 255, 255, 0.08);
  position: relative;
}

.reddit-comment .replies-thread .reddit-comment {
  margin-bottom: 12px;
  position: relative;
}

.reddit-comment .replies-thread .reddit-comment::before {
  content: '';
  position: absolute;
  left: -20px;
  top: 8px;
  width: 16px;
  height: 2px;
  background: rgba(255, 255, 255, 0.08);
}

.reddit-comment .replies-thread .reddit-comment:last-child {
  margin-bottom: 0;
}

.reddit-comment .collapse-btn {
  background: transparent;
  border: none;
  color: var(--muted);
  cursor: pointer;
  font-size: 0.7rem;
  padding: 0;
  width: 16px;
  height: 16px;
  display: grid;
  place-items: center;
  transition: color 0.2s ease;
  flex-shrink: 0;
  margin-top: 4px;
}

.reddit-comment .collapse-btn:hover {
  color: var(--text);
}

.reddit-comment.collapsed .comment-text,
.reddit-comment.collapsed .comment-actions-bar,
.reddit-comment.collapsed .replies-thread {
  display: none;
}

.reddit-comment.collapsed .comment-meta::after {
  content: ' [collapsed]';
  color: var(--muted);
  font-style: italic;
}

.comments-empty {
  color: var(--muted);
  text-align: center;
  padding: 40px 20px;
  font-size: 0.95rem;
}

.comment-form {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.comment-form textarea {
  width: 100%;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--line);
  color: var(--text);
  border-radius: 12px;
  padding: 12px;
  resize: vertical;
  min-height: 70px;
  font-family: inherit;
}

.comment-form textarea:focus {
  outline: none;
  border-color: rgba(91, 179, 255, 0.5);
  background: rgba(91, 179, 255, 0.05);
}

.comment-form-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: var(--muted);
}

.comment-login-prompt {
  background: rgba(91, 179, 255, 0.06);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px;
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
}

.report-reason-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255,255,255,0.02);
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.report-reason-card:hover {
  border-color: rgba(91, 179, 255, 0.35);
  background: rgba(91, 179, 255, 0.06);
}

.report-reason-card.selected {
  border-color: rgba(91, 179, 255, 0.6);
  background: rgba(91, 179, 255, 0.1);
}

.report-reason-card input[type="radio"] {
  accent-color: var(--primary);
  width: 18px;
  height: 18px;
}

.report-reason-card label {
  color: var(--text);
  font-weight: 600;
  cursor: pointer;
  flex: 1;
}

.history-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255,255,255,0.02);
}

.history-title {
  color: var(--text);
  font-weight: 600;
  flex: 1;
}

.history-meta {
  color: var(--muted);
  font-size: 0.85rem;
}

.history-actions {
  display: flex;
  gap: 8px;
}

.history-actions button {
  border: none;
  border-radius: 10px;
  padding: 8px 12px;
  cursor: pointer;
  font-weight: 700;
  font-size: 0.8rem;
}

.btn-edit {
  background: rgba(91, 179, 255, 0.15);
  color: var(--primary);
  border: 1px solid rgba(91, 179, 255, 0.3);
}

.history-empty {
  color: var(--muted);
  font-size: 0.9rem;
  padding: 10px 0;
}

.modal-meta-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 14px;
}

.modal-meta-card {
  background: transparent;
  border: none;
  border-radius: 0;
  padding: 12px 0;
}

.modal-meta-card strong {
  font-size: 0.95rem;
  color: #f3f4f6;
}

.modal-meta-card .meta-label {
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  display: block;
  margin-bottom: 6px;
}

.modal-section {
  background: transparent;
  border: none;
  border-radius: 0;
  padding: 14px 0;
  margin-bottom: 12px;
}

.modal-section h4 {
  margin-bottom: 10px;
  color: var(--teal);
}

.hint-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 0;
  margin-top: 10px;
}

.hint-text {
  color: var(--muted);
}

.hint-btn {
  border: 1px solid rgba(183, 165, 255, 0.3);
  background: rgba(183, 165, 255, 0.08);
  color: var(--text);
  border-radius: 10px;
  padding: 0.6rem 0.8rem;
  cursor: pointer;
}

.hints-container {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.hint-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--line);
  border-radius: 10px;
}

.hint-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.hint-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
}

.hint-cost {
  font-size: 0.78rem;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 4px;
}

.hint-empty {
  padding: 12px 14px;
  color: var(--muted);
  font-size: 0.85rem;
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--line);
  border-radius: 10px;
}

.flag-submission {
  display: flex;
  gap: 10px;
}

.flag-input {
  width: 100%;
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--line);
  border-radius: 12px;
  color: var(--text);
  padding: 0.8rem 0.9rem;
}

.flag-input:focus,
input:focus {
  outline: none;
  border-color: rgba(91, 179, 255, 0.6);
}

/* ===== Reddit-style challenge card ===== */
.card-header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.card-meta-left {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.card-category-icon {
  width: 20px;
  height: 20px;
  border-radius: 4px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--teal) 100%);
  display: grid;
  place-items: center;
  color: #07111d;
  font-size: 0.65rem;
  font-weight: 800;
}

.card-category-name {
  font-size: 0.82rem;
  font-weight: 700;
  color: #f3f4f6;
}

.card-time-ago {
  font-size: 0.78rem;
  color: #8b949e;
}

.card-category-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  font-size: 0.68rem;
  font-weight: 700;
  border: 1px solid rgba(183, 165, 255, 0.3);
  color: var(--purple);
  background: rgba(183, 165, 255, 0.08);
}

.card-joined-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
  border: 1px solid var(--line);
  color: var(--primary);
  background: rgba(91, 179, 255, 0.08);
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s ease;
}

.card-options-btn {
  background: transparent;
  border: none;
  color: #8b949e;
  cursor: pointer;
  font-size: 1.1rem;
  padding: 4px;
  line-height: 1;
}

.card-options-btn:hover {
  color: var(--text);
}

.card-action-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
  flex-wrap: wrap;
}

.action-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 9999px;
  font-size: 0.8rem;
  font-weight: 600;
  background: rgba(255, 255, 255, 0.08);
  color: #8b949e;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.2s ease, color 0.2s ease;
}

.action-pill:hover {
  background: rgba(255, 255, 255, 0.15);
  color: var(--text);
}

.action-pill i {
  font-size: 0.85rem;
}

.vote-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 9999px;
  font-size: 0.8rem;
  font-weight: 700;
  background: rgba(255, 255, 255, 0.08);
  color: #f3f4f6;
  border: none;
  cursor: pointer;
  text-decoration: none;
  user-select: none;
  transition: background 0.2s ease;
}

.vote-pill:hover {
  background: rgba(255, 255, 255, 0.15);
}

.vote-pill .vote-arrow {
  font-size: 0.9rem;
  color: #8b949e;
}

.vote-pill .vote-count {
  min-width: 18px;
  text-align: center;
}

/* ===== Sidebar widgets ===== */
.top-challenges-list,
.recent-activity-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.widget-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.widget-clear-link {
  font-size: 0.78rem;
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
}

.widget-clear-link:hover {
  color: var(--teal);
}

.community-board {
  margin-top: 28px;
  padding: 20px 0;
  background: transparent;
  border: none;
  border-radius: 0;
}

.community-feed {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.community-card {
  border-color: rgba(109, 224, 208, 0.35);
}

.auth-card {
  width: min(440px, 100%);
  padding: 28px 24px;
}

.auth-form-helper {
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.55;
  margin: 0 0 18px;
  padding: 12px 14px;
  background: rgba(91, 179, 255, 0.06);
  border: 1px solid var(--line);
  border-radius: 10px;
}

.auth-card .auth-brand {
  margin-bottom: 20px;
}

.auth-card .auth-brand h2 {
  font-size: 1.4rem;
  margin: 0;
}

.auth-card .brand-mark-icon {
  width: 48px;
  height: 48px;
  font-size: 1.4rem;
  margin-bottom: 0;
  flex-shrink: 0;
}

.auth-brand {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 24px;
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.field-wrap {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.field-wrap label {
  color: var(--muted);
  font-size: 0.88rem;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.field-wrap input,
.textbox,
#challengeSearch,
#searchBox {
  width: 100%;
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.85rem 0.9rem;
  color: var(--text);
}

.form-message {
  min-height: 20px;
  color: var(--muted);
  font-size: 0.87rem;
}

.form-message-inline {
  min-height: 20px;
  font-size: 0.87rem;
  margin: 0.5rem 0;
  color: var(--muted);
}

.form-message-inline.error {
  color: var(--danger);
}

.form-message-inline.success {
  color: var(--success);
}

.form-message.error {
  color: var(--danger);
}

.password-field {
  position: relative;
}

.password-field input {
  padding-right: 44px;
}

.password-toggle {
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  background: transparent;
  border: none;
  color: var(--muted);
  cursor: pointer;
  padding: 4px;
  font-size: 0.9rem;
  line-height: 1;
  transition: color 0.2s ease;
}

.password-toggle:hover {
  color: var(--text);
}

.form-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.checkbox-wrap {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--muted);
  cursor: pointer;
}

.checkbox-wrap input[type="checkbox"] {
  width: auto;
  accent-color: var(--primary);
  cursor: pointer;
}

.forgot-link {
  color: var(--primary);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
}

.forgot-link:hover {
  color: var(--teal);
  text-decoration: underline;
}

.password-strength {
  margin-top: 8px;
}

.strength-bar {
  width: 100%;
  height: 4px;
  background: rgba(255,255,255,0.06);
  border-radius: 999px;
  overflow: hidden;
  margin-bottom: 6px;
}

.strength-fill {
  height: 100%;
  width: 0%;
  border-radius: 999px;
  background: var(--danger);
  transition: width 0.3s ease, background 0.3s ease;
}

.password-strength.weak .strength-fill {
  width: 33%;
  background: var(--danger);
}

.password-strength.medium .strength-fill {
  width: 66%;
  background: var(--amber);
}

.password-strength.strong .strength-fill {
  width: 100%;
  background: var(--success);
}

.strength-text {
  font-size: 0.78rem;
  color: var(--muted);
}

.auth-container {
  display: flex;
  min-height: 100vh;
  width: 100%;
  position: relative;
  z-index: 1;
  background: rgba(7, 17, 29, 0.65);
}

.auth-container > div {
  background: transparent;
}

.auth-container canvas {
  display: none;
}

body[data-page="landing"] > canvas#networkCanvas,
body[data-page="login"] > canvas#networkCanvas,
body[data-page="signup"] > canvas#networkCanvas {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: none;
  display: block;
}

.auth-left {
  flex: 1;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  min-height: 100vh;
  z-index: 1;
}

.auth-left-content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 40px;
}

.auth-left .brand-mark-icon {
  width: auto;
  height: auto;
  font-size: 5rem;
  margin-bottom: 24px;
}

.auth-left .brand-text {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 16px;
}

.auth-left-subtitle {
  color: var(--muted);
  font-size: 1.1rem;
  max-width: 420px;
  line-height: 1.6;
  margin: 0 auto;
}

.auth-right {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
  min-height: 100vh;
  position: relative;
  z-index: 1;
}

.auth-form-wrapper {
  width: 100%;
  max-width: 420px;
}

.auth-form-wrapper .auth-brand {
  margin-bottom: 32px;
}

.auth-form-wrapper .brand-mark-icon {
  width: auto;
  height: auto;
  font-size: 2.2rem;
  margin-bottom: 12px;
}

.auth-form-wrapper .auth-brand h2 {
  font-size: 2rem;
  margin: 0;
}

.auth-form-wrapper .auth-form {
  gap: 20px;
}

.auth-form-wrapper .field-wrap label {
  font-size: 0.9rem;
}

.auth-form-wrapper input {
  padding: 0.95rem 1rem;
}

.auth-footer {
  text-align: center;
  color: var(--muted);
  margin-top: 24px;
  font-size: 0.9rem;
}

.auth-footer a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
}

.auth-footer a:hover {
  color: var(--teal);
}

@media (max-width: 768px) {
  .auth-container {
    flex-direction: column;
  }

  .auth-left {
    min-height: 280px;
    flex: none;
  }

  .auth-left .brand-text {
    font-size: 1.8rem;
  }

  .auth-left-subtitle {
    font-size: 0.95rem;
    max-width: 300px;
  }

  .auth-right {
    padding: 32px 20px;
    flex: 1;
  }

  .auth-form-wrapper {
    max-width: 100%;
  }
}

.legal-content {
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.65;
  max-height: 55vh;
  overflow-y: auto;
  padding-right: 8px;
  text-align: left;
}

.legal-content h3 {
  color: var(--primary);
  font-size: 1rem;
  margin: 22px 0 8px;
  font-weight: 700;
}

.legal-content p {
  margin: 0 0 12px;
}

.legal-content ul {
  margin: 0 0 12px;
  padding-left: 20px;
}

.legal-content li {
  margin-bottom: 6px;
}

.legal-content strong {
  color: #e5e7eb;
}

.profile-shell {
  padding: 32px 0 52px;
}

.profile-hero {
  display: flex;
  gap: 28px;
  align-items: flex-start;
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
  margin-bottom: 28px;
}

.profile-avatar-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}

.profile-avatar {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(91, 179, 255, 0.15), rgba(109, 224, 208, 0.1));
  border: 2px solid rgba(91, 179, 255, 0.35);
  display: grid;
  place-items: center;
  color: var(--primary);
  font-size: 2.4rem;
  overflow: hidden;
}

.profile-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
}

.profile-info-col {
  flex: 1;
  min-width: 0;
}

.profile-name {
  font-size: 1.8rem;
  font-weight: 800;
  margin: 0 0 8px;
}

.profile-bio {
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.6;
  margin: 0 0 18px;
  max-width: 640px;
}

.profile-meta-row {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.meta-chip {
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px 14px;
}

.meta-chip .meta-label {
  display: block;
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 4px;
}

.meta-chip strong {
  font-size: 1rem;
}

.profile-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 22px;
}

.profile-section {
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.profile-section:last-child {
  border-bottom: none;
}

.settings-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.settings-section {
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.settings-section:last-child {
  border-bottom: none;
}

.settings-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.settings-form label {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.settings-form label span:first-child {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text);
}

.settings-form input[type="password"],
.settings-form input[type="text"] {
  width: 100%;
  padding: 0.7rem 0.9rem;
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--text);
  font-size: 0.95rem;
}

.settings-form input:focus {
  outline: none;
  border-color: var(--primary);
}

.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid rgba(255,255,255,0.04);
  cursor: pointer;
}

.toggle-row span:first-child {
  font-size: 0.92rem;
  color: var(--text);
}

.toggle-row input[type="checkbox"] {
  appearance: none;
  width: 44px;
  height: 24px;
  background: rgba(255,255,255,0.1);
  border-radius: 999px;
  position: relative;
  cursor: pointer;
  transition: background 0.2s ease;
  flex-shrink: 0;
}

.toggle-row input[type="checkbox"]::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 20px;
  height: 20px;
  background: var(--text);
  border-radius: 50%;
  transition: transform 0.2s ease;
}

.toggle-row input[type="checkbox"]:checked {
  background: var(--primary);
}

.toggle-row input[type="checkbox"]:checked::after {
  transform: translateX(20px);
}

.danger-zone {
  border: 1px solid rgba(239, 68, 68, 0.3);
  border-radius: 12px;
  padding: 18px;
  background: rgba(239, 68, 68, 0.05);
}

.danger-zone .section-title {
  color: #ef4444;
}

.form-message {
  display: none;
  padding: 10px 12px;
  border-radius: 8px;
  font-size: 0.85rem;
  margin-top: 4px;
}

.form-message.show {
  display: block;
}

.form-message.success {
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: #10b981;
}

.form-message.error {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #ef4444;
}

@media (max-width: 768px) {
  .settings-grid {
    grid-template-columns: 1fr;
  }
}

.tag-list,
.history-list,
.badge-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag {
  padding: 0.46rem 0.7rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: rgba(255,255,255,0.02);
  color: var(--muted);
}

.badge-list {
  margin-top: 14px;
}

.badge-section {
  padding: 26px 0 12px;
}

.badge-showcase {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
}

.badge-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px;
  background: linear-gradient(180deg, rgba(19, 29, 49, 0.9), rgba(10, 17, 29, 0.92));
  border: 1px solid var(--line);
  border-radius: 18px;
  transition: transform 0.2s ease;
}

.badge-card.unlocked {
  border-color: rgba(109, 224, 208, 0.4);
}

.badge-card.locked {
  opacity: 0.7;
}

.badge-card:hover {
  transform: translateY(-2px);
}

.badge-icon {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  font-size: 1.2rem;
  border: 1px solid var(--line);
}

.badge-copy {
  flex: 1;
}

.badge-copy h3 {
  font-size: 1rem;
  margin-bottom: 4px;
}

.badge-copy p {
  color: var(--muted);
  font-size: 0.8rem;
}

.badge-status {
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0.4rem 0.7rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.02);
  color: var(--text);
  font-size: 0.85rem;
  font-weight: 500;
}

.badge-pill.badge-success {
  border-color: rgba(16, 185, 129, 0.4);
  color: #10b981;
}

.badge-pill.badge-primary {
  border-color: rgba(91, 179, 255, 0.4);
  color: #5bb3ff;
}

.badge-pill.badge-amber {
  border-color: rgba(245, 158, 11, 0.4);
  color: #f59e0b;
}

.badge-pill.badge-danger {
  border-color: rgba(239, 68, 68, 0.4);
  color: #ef4444;
}

.history-item {
  width: 100%;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255,255,255,0.02);
}

.history-title {
  color: var(--text);
}

.history-meta {
  color: var(--teal);
}

.history-empty {
  color: var(--muted);
}

.dashboard-search {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.7rem 0.9rem;
  max-width: 420px;
}

.dashboard-search input {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text);
}

.dashboard-search input:focus {
  outline: none;
}

.search-clear {
  background: transparent;
  border: none;
  color: var(--muted);
  cursor: pointer;
  padding: 4px 6px;
  border-radius: 6px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s, color 0.15s;
}
.search-clear:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
}
.search-clear[hidden] {
  display: none;
}

.challenge-shell {
  padding-top: 32px;
  padding-bottom: 50px;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: max(16px, env(safe-area-inset-bottom));
  transform: translate(-50%, calc(100% + 24px));
  width: max-content;
  max-width: min( calc(100vw - 32px), 480px);
  padding: 0.82rem 1.2rem;
  border-radius: 12px;
  border: 1px solid var(--line);
  color: #07111d;
  background: linear-gradient(135deg, var(--primary) 0%, var(--teal) 100%);
  font-weight: 700;
  z-index: 2000;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: transform 0.25s ease, opacity 0.2s ease, visibility 0.2s ease;
}

.toast.show {
  transform: translate(-50%, 0);
  opacity: 1;
  visibility: visible;
}

.toast.error {
  background: linear-gradient(135deg, #ff8a80 0%, var(--danger) 100%);
}

.toast.success {
  background: linear-gradient(135deg, var(--teal) 0%, var(--success) 100%);
}

.loading,
.loading-small {
  color: var(--muted);
  text-align: center;
  padding: 18px;
}

.cyber-loading-screen {
  position: fixed;
  inset: 0;
  z-index: 3000;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 16px;
  background:
    radial-gradient(circle at 50% 40%, rgba(61, 142, 255, 0.14), transparent 34%),
    radial-gradient(circle at 50% 60%, rgba(109, 224, 208, 0.08), transparent 40%),
    linear-gradient(180deg, #050c16 0%, #0b1728 100%);
  transition: opacity 0.32s ease, visibility 0.32s ease;
}

.cyber-loading-screen::before,
.cyber-loading-screen::after {
  position: absolute;
  inset: 0;
  pointer-events: none;
  content: "";
}

.cyber-loading-screen::before {
  opacity: 0.18;
  background-image:
    linear-gradient(rgba(109, 224, 208, 0.1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(109, 224, 208, 0.1) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: radial-gradient(circle at center, black, transparent 70%);
  -webkit-mask-image: radial-gradient(circle at center, black, transparent 70%);
}

.cyber-loading-screen::after {
  background: linear-gradient(transparent 46%, rgba(109, 224, 208, 0.1) 50%, transparent 54%);
  background-size: 100% 14px;
  animation: cyber-scan 2.4s linear infinite;
}

.cyber-loading-screen.is-hidden {
  opacity: 0;
  visibility: hidden;
}

.cyber-loading-screen.is-error {
  background:
    radial-gradient(circle at 50% 40%, rgba(255, 117, 111, 0.12), transparent 34%),
    linear-gradient(180deg, #0c0505 0%, #1a0b0b 100%);
}

.cyber-loading-screen.is-error::before {
  opacity: 0.14;
  background-image:
    linear-gradient(rgba(255, 117, 111, 0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 117, 111, 0.12) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: radial-gradient(circle at center, black, transparent 70%);
  -webkit-mask-image: radial-gradient(circle at center, black, transparent 70%);
}

.cyber-loading-screen.is-error::after {
  background: linear-gradient(transparent 46%, rgba(255, 117, 111, 0.1) 50%, transparent 54%);
  background-size: 100% 14px;
  animation: cyber-scan-error 2.4s linear infinite;
}

.cyber-loader-error {
  display: none;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  color: var(--danger);
  font-size: 0.9rem;
  font-weight: 700;
  text-align: center;
  padding: 18px;
}

.cyber-loader-error i {
  font-size: 2rem;
  margin-bottom: 4px;
}

.is-error .cyber-loader,
.is-error .cyber-loader-title,
.is-error .cyber-loader-status,
.is-error .cyber-loader-subtitle {
  display: none;
}

.is-error .cyber-loader-error {
  display: flex;
}

.cyber-loader {
  position: relative;
  display: grid;
  place-items: center;
  width: 96px;
  height: 96px;
  color: var(--teal);
  filter: drop-shadow(0 0 18px rgba(109, 224, 208, 0.18));
}

.cyber-loader-ring {
  position: absolute;
  inset: 0;
  border: 1.5px solid rgba(109, 224, 208, 0.32);
  border-top-color: var(--teal);
  border-right-color: var(--primary);
  border-radius: 50%;
  animation: cyber-spin 1.05s linear infinite;
}

.cyber-loader-ring::before,
.cyber-loader-ring::after {
  position: absolute;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 16px var(--teal);
  content: "";
}

.cyber-loader-ring::before {
  top: 6px;
  right: 10px;
}

.cyber-loader-ring::after {
  bottom: 6px;
  left: 10px;
  background: var(--primary);
  box-shadow: 0 0 16px var(--primary);
}

.cyber-loader-core {
  display: grid;
  place-items: center;
  width: 60px;
  height: 60px;
  border: 1px solid rgba(237, 244, 255, 0.28);
  border-radius: 20px;
  background: rgba(13, 23, 40, 0.94);
  color: var(--primary);
  font-size: 1.45rem;
  box-shadow: 0 0 32px rgba(61, 142, 255, 0.25);
  animation: cyber-pulse 1.35s ease-in-out infinite;
}

.cyber-loader-title {
  position: relative;
  color: var(--text);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.22em;
  text-align: center;
  text-shadow: 0 0 12px rgba(109, 224, 208, 0.25);
}

.cyber-loader-status {
  position: relative;
  display: flex;
  gap: 8px;
}

.cyber-loader-status span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 12px var(--teal);
  animation: cyber-blink 1.05s ease-in-out infinite;
}

.cyber-loader-status span:nth-child(2) {
  animation-delay: 0.16s;
}

.cyber-loader-status span:nth-child(3) {
  animation-delay: 0.32s;
}

.cyber-loader-subtitle {
  position: relative;
  color: var(--muted);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
}

@keyframes cyber-spin {
  to { transform: rotate(360deg); }
}

@keyframes cyber-pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(0.9); opacity: 0.7; }
}

@keyframes cyber-blink {
  0%, 100% { opacity: 0.2; transform: scale(0.7); }
  50% { opacity: 1; transform: scale(1.1); }
}

@keyframes cyber-scan {
  from { transform: translateY(-14px); }
  to { transform: translateY(14px); }
}

@keyframes cyber-scan-error {
  from { transform: translateY(-14px); }
  to { transform: translateY(14px); }
}

@media (prefers-reduced-motion: reduce) {
  .cyber-loading-screen::after,
  .cyber-loader-ring,
  .cyber-loader-core,
  .cyber-loader-status span {
    animation: none;
  }
}

.community-board {
  display: grid;
  gap: 18px;
  background: linear-gradient(180deg, rgba(19, 29, 49, 0.9), rgba(10, 17, 29, 0.92));
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 20px;
}

.community-toolbar {
  display: flex;
  justify-content: flex-end;
}

.community-sort {
  background: rgba(255,255,255,0.02);
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.5rem 0.8rem;
  font-weight: 600;
  cursor: pointer;
}

.community-sort.active,
.community-sort:hover {
  background: linear-gradient(135deg, rgba(91, 179, 255, 0.18), rgba(109, 224, 208, 0.12));
  color: var(--text);
  border-color: rgba(91, 179, 255, 0.25);
}

.community-feed {
  display: grid;
  gap: 14px;
}

.community-card {
  border-left: 2px solid rgba(109, 224, 208, 0.5);
}

.community-form {
  display: grid;
  gap: 18px;
}

.field-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.community-form label {
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-size: 0.88rem;
}

.community-form input,
.community-form textarea,
.community-form select {
  width: 100%;
  background: rgba(255,255,255,0.02);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.85rem 0.9rem;
}

.community-form textarea {
  min-height: 120px;
  resize: vertical;
}

.form-header h3 {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--text);
}

.policy-box {
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px;
  display: grid;
  gap: 10px;
}

.policy-box p {
  color: var(--muted);
}

.policy-check {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  color: var(--text);
}

.policy-check input {
  width: auto;
  margin-top: 3px;
}

#communityFormMessage {
  min-height: 24px;
  color: var(--muted);
}

#communityFormMessage.error {
  color: var(--danger);
}

@media (max-width: 980px) {
  .app-shell {
    grid-template-columns: 260px 1fr;
  }
  .sidebar-column {
    display: none;
  }
  .dashboard-grid {
    grid-template-columns: 1fr;
  }
  .dashboard-topbar {
    grid-template-columns: auto 1fr auto;
  }
}

@media (max-width: 640px) {
  .app-shell {
    grid-template-columns: 1fr;
  }
  .sidebar-nav {
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    max-width: 280px;
    width: 85vw;
    z-index: 1000;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
  }
  .sidebar-nav.mobile-open {
    transform: translateX(0);
  }
  .sidebar-toggle {
    display: none;
  }
  .dashboard-grid {
    display: flex;
    flex-direction: column;
    gap: 16px;
  }
  .feed-column {
    width: 100%;
  }
  .challenge-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  .challenge-stats {
    flex-direction: column;
    gap: 10px;
  }
  .challenge-actions {
    display: flex;
    gap: 8px;
    width: 100%;
  }
  .section-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
  .leaderboard-table {
    font-size: 0.8rem;
  }
  .leaderboard-table th,
  .leaderboard-table td {
    padding: 8px 10px;
  }
  .container {
    width: min(100% - 16px, 1200px);
  }
  .auth-container {
    flex-direction: column;
  }
  .auth-left {
    min-height: 200px;
    flex: none;
  }
  .auth-right {
    min-height: auto;
    padding: 24px 14px;
    flex: 1;
  }
  .hero {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 48px 0 28px;
    text-align: center;
  }
  .hero-copy h1 {
    font-size: clamp(1.8rem, 5vw, 2.6rem);
  }
  .cta-row {
    justify-content: center;
  }
  .hero-stats {
    justify-content: center;
  }
  .hero-stats div {
    min-width: 100px;
  }
  .topbar {
    grid-template-columns: 1fr;
    gap: 12px;
    min-height: auto;
    padding: 12px 0;
  }
  .top-links {
    display: none;
  }
  .top-links.mobile-open {
    display: flex;
    flex-direction: column;
    width: 100%;
    padding: 12px 0;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    margin: 8px 0;
    gap: 4px;
  }
  .top-links.mobile-open a {
    padding: 14px 16px;
    border-radius: 10px;
    color: var(--muted);
    font-weight: 500;
    font-size: 1rem;
    background: rgba(255,255,255,0.02);
    border: 1px solid transparent;
    transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
  }
  .top-links.mobile-open a:hover {
    background: rgba(91, 179, 255, 0.1);
    border-color: var(--line);
    color: var(--text);
  }
  .top-actions {
    display: flex;
    justify-content: center;
    width: 100%;
    gap: 10px;
    flex-wrap: wrap;
  }
  .top-actions .btn {
    flex: 1;
    min-width: 140px;
    text-align: center;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .timeline {
    grid-template-columns: 1fr;
  }
  .timeline-step {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
  .panel-box {
    flex-direction: column;
    text-align: center;
  }
  .footer-inner {
    flex-direction: column;
    text-align: center;
  }
  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .leaderboard-stats {
    grid-template-columns: 1fr;
  }
  .profile-meta-row {
    grid-template-columns: 1fr;
  }
  .brand-mark-icon {
    width: 32px;
    height: 32px;
    font-size: 0.85rem;
  }
  .brand-text {
    font-size: 0.95rem;
  }
  .sidebar-link span {
    display: inline;
  }
  .sidebar-links {
    justify-content: flex-start;
  }
  .sidebar-nav {
    padding: 12px 10px;
    gap: 6px;
  }
}

/* ===== Logo image ===== */
.brand-mark-icon {
   display: inline-flex;
   align-items: center;
   justify-content: center;
   color: var(--primary);
   font-size: 1.1rem;
}

.auth-left .brand-mark-icon {
  font-size: 6rem;
}

.auth-form-wrapper .brand-mark-icon {
  font-size: 2.8rem;
}

/* ===== Top nav links (dashboard header) ===== */
.top-nav {
  display: flex;
  gap: 14px;
  align-items: center;
}

.top-nav .nav-link {
  padding: 0.45rem 0.85rem;
  border-radius: 10px;
  border: 1px solid transparent;
  color: var(--muted);
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.top-nav .nav-link:hover {
  color: var(--text);
  background: rgba(91, 179, 255, 0.08);
  border-color: var(--line);
}

.top-nav .nav-link.active {
  color: var(--text);
  background: rgba(91, 179, 255, 0.16);
  border-color: rgba(91, 179, 255, 0.35);
}

/* ===== Floating Create CTF button ===== */
.floating-create-btn {
   position: fixed;
   right: 28px;
   bottom: 28px;
   z-index: 900;
   padding: 0.65rem 1rem;
   border-radius: 999px;
   box-shadow: 0 6px 20px rgba(61, 142, 255, 0.3), 0 0 0 1px rgba(109, 224, 208, 0.3);
   border: none;
   font-size: 0.85rem;
   font-weight: 600;
}

.floating-create-btn::before {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--primary), var(--teal));
  opacity: 0.25;
  z-index: -1;
  filter: blur(12px);
}

.floating-create-btn:hover {
  transform: translateY(-2px);
}

@media (max-width: 640px) {
  .floating-create-btn {
    right: 16px;
    bottom: 16px;
    padding: 0.75rem 1rem;
    font-size: 0.85rem;
  }
}

/* ===== Confirm Modal ===== */
.confirm-card {
  width: min(460px, 100%);
  text-align: center;
  padding: 32px 28px;
}

.confirm-icon {
  display: grid;
  place-items: center;
  width: 64px;
  height: 64px;
  margin: 0 auto 14px;
  border-radius: 50%;
  background: rgba(255, 117, 111, 0.12);
  border: 1px solid rgba(255, 117, 111, 0.4);
  color: var(--danger);
  font-size: 1.8rem;
}

.confirm-title {
  font-size: 1.4rem;
  margin-bottom: 10px;
}

.confirm-message {
  color: var(--muted);
  margin-bottom: 24px;
  line-height: 1.55;
}

.confirm-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.btn-danger {
  background: linear-gradient(135deg, var(--danger) 0%, #d83b3b 100%);
  color: #fff;
}

/* ===== Comments section ===== */
.comments-section {
  margin-top: 8px;
}

.comments-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-height: 280px;
  overflow-y: auto;
  padding-right: 4px;
  margin-bottom: 16px;
}


.app-shell {
  display: grid;
  grid-template-columns: 260px 1fr;
  min-height: 100vh;
  background: var(--bg-900);
}

.app-main {
  display: flex;
  flex-direction: column;
  min-width: 0;
  background: var(--bg-900);
}

.sidebar-toggle {
   align-self: flex-end;
   background: rgba(91, 179, 255, 0.08);
   border: 1px solid var(--line-strong);
   color: var(--muted);
   width: 32px;
   height: 32px;
   border-radius: 8px;
   cursor: pointer;
   transition: all 0.2s ease;
   display: flex;
   align-items: center;
   justify-content: center;
}

.sidebar-toggle:hover {
   background: rgba(91, 179, 255, 0.15);
   color: var(--primary);
}

.menu-toggle {
   display: none;
   background: rgba(91, 179, 255, 0.08);
   border: 1px solid var(--line-strong);
   color: var(--muted);
   width: 36px;
   height: 36px;
   border-radius: 10px;
   cursor: pointer;
   transition: all 0.2s ease;
   align-items: center;
   justify-content: center;
   font-size: 1.1rem;
   margin-right: 12px;
}

.menu-toggle:hover {
   background: rgba(91, 179, 255, 0.15);
   color: var(--primary);
}

.sidebar-overlay {
   display: none;
   position: fixed;
   top: 0;
   left: 0;
   width: 100vw;
   height: 100vh;
   background: rgba(0, 0, 0, 0.5);
   z-index: 800;
}

.sidebar-overlay.active {
   display: block;
}

.sidebar-brand {
   padding-bottom: 14px;
   border-bottom: 1px solid var(--line);
   display: flex;
   align-items: center;
   gap: 12px;
}

.sidebar-nav.collapsed .sidebar-brand {
   justify-content: center;
}

.sidebar-nav.collapsed .brand-text {
   display: none;
}

.sidebar-nav {
  background: transparent;
  border-right: 1px solid var(--line);
  padding: 18px 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  transition: all 0.3s ease;
}

.sidebar-nav.collapsed {
  min-width: 70px;
  padding: 18px 10px;
}

.sidebar-nav.collapsed .sidebar-brand {
  justify-content: center;
}

.sidebar-nav.collapsed .brand-text {
  display: none;
}

.sidebar-nav.collapsed .sidebar-section-links {
  display: none;
}

.sidebar-nav.collapsed .sidebar-section-header span {
  display: none;
}

.sidebar-nav.collapsed .sidebar-section-header i {
  margin: 0;
}

.sidebar-nav.collapsed .sidebar-footer {
  align-self: center;
}

.sidebar-nav.collapsed .sidebar-footer button {
  padding: 0.6rem;
}

.sidebar-nav.collapsed .sidebar-footer button span {
  display: none;
}

.sidebar-nav.collapsed .sidebar-footer button i {
  margin-right: 0;
}

.sidebar-links {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
}

.sidebar-section {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sidebar-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 0.55rem 0.7rem;
  background: transparent;
  border: none;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  border-radius: 8px;
  transition: background 0.2s ease, color 0.2s ease;
}

.sidebar-section-header:hover {
  background: rgba(255,255,255,0.04);
  color: var(--text);
}

.sidebar-section-header i {
  font-size: 0.65rem;
  transition: transform 0.2s ease;
}

.sidebar-section-header.collapsed i {
  transform: rotate(-90deg);
}

.sidebar-section-links {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sidebar-section-links.collapsed {
  display: none;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0.65rem 0.9rem;
  border-radius: 999px;
  border: 1px solid transparent;
  color: var(--muted);
  font-weight: 600;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.sidebar-link:hover {
  color: var(--text);
  background: rgba(255,255,255,0.04);
}

.sidebar-link.active {
  color: var(--text);
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.08);
}

.sidebar-footer {
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.app-main {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.user-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0.5rem 0.85rem;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: rgba(255,255,255,0.03);
  font-size: 0.85rem;
  color: var(--muted);
}

/* ===== Leaderboard page ===== */
.leaderboard-shell {
  padding-top: 28px;
  padding-bottom: 60px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.leaderboard-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.stat-card {
  text-align: center;
  padding: 20px 14px;
}

.stat-card strong {
  display: block;
  margin-top: 6px;
  font-size: 1.6rem;
  color: var(--primary);
}

.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}

.filter-row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.filter-btn {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.45rem 0.9rem;
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.filter-btn:hover {
  background: rgba(255,255,255,0.06);
  color: var(--text);
  border-color: rgba(148, 163, 184, 0.28);
}

.filter-btn.active {
  background: linear-gradient(135deg, rgba(91, 179, 255, 0.18), rgba(109, 224, 208, 0.12));
  color: var(--text);
  border-color: rgba(91, 179, 255, 0.35);
}

.leaderboard-card {
  background: linear-gradient(180deg, rgba(17, 27, 44, 1), rgba(9, 15, 28, 1));
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 24px;
}

.leaderboard-table-wrap {
  margin-top: 16px;
  overflow-x: auto;
}

.leaderboard-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 520px;
}

.leaderboard-table th,
.leaderboard-table td {
  padding: 12px 14px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  font-size: 0.95rem;
}

.leaderboard-table th {
  color: var(--muted);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-size: 0.72rem;
}

.leaderboard-table tr.you td {
  background: rgba(91, 179, 255, 0.08);
}

.leaderboard-table tr.you-separator td {
  border-top: 1px dashed rgba(148, 163, 184, 0.22);
}

.rank-pill.you-rank {
  background: rgba(91, 179, 255, 0.12);
  border-color: rgba(91, 179, 255, 0.35);
  color: var(--primary);
  font-size: 0.85rem;
}

.rank-pill {
  display: inline-grid;
  place-items: center;
  min-width: 34px;
  height: 30px;
  padding: 0 10px;
  border-radius: 999px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--line-strong);
  font-weight: 700;
}

.rank-pill.top1 { background: linear-gradient(135deg, #f6d37d, #f3c37a); color: #1a1300; border-color: rgba(246, 211, 125, 0.5); }
.rank-pill.top2 { background: linear-gradient(135deg, #d6d8e0, #b9c5d9); color: #11141a; border-color: rgba(217, 220, 230, 0.5); }
.rank-pill.top3 { background: linear-gradient(135deg, #e09d6b, #c47a4d); color: #1a0d00; border-color: rgba(224, 157, 107, 0.5); }

.user-cell {
  display: flex;
  align-items: center;
  gap: 10px;
}

.user-avatar {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--teal));
  color: #07111d;
  font-weight: 800;
}

.badge-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.mini-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 0.25rem 0.55rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 600;
  background: rgba(109, 224, 208, 0.08);
  border: 1px solid rgba(109, 224, 208, 0.25);
  color: var(--teal);
}

.mini-badge.gold { background: rgba(246, 211, 125, 0.08); border-color: rgba(246, 211, 125, 0.3); color: var(--gold); }
.mini-badge.silver { background: rgba(217, 220, 230, 0.08); border-color: rgba(217, 220, 230, 0.3); color: #d6d8e0; }
.mini-badge.bronze { background: rgba(224, 157, 107, 0.08); border-color: rgba(224, 157, 107, 0.3); color: #e09d6b; }
.mini-badge.indigo { background: rgba(183, 165, 255, 0.08); border-color: rgba(183, 165, 255, 0.3); color: var(--purple); }

@media (max-width: 960px) {
  .menu-toggle {
    display: flex;
  }
  .app-shell {
    grid-template-columns: 1fr;
  }
  .sidebar-nav {
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    max-width: 280px;
    width: 85vw;
    z-index: 1000;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
  }
  .sidebar-nav.mobile-open {
    transform: translateX(0);
  }
  .sidebar-toggle {
    display: none;
  }
  .sidebar-brand {
    border-bottom: none;
    padding-bottom: 0;
    flex: 1;
  }
  .sidebar-links {
    flex-direction: column;
    gap: 6px;
  }
  .sidebar-footer {
    border-top: none;
    padding-top: 0;
  }
  .leaderboard-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .sidebar-toggle {
    display: none;
  }
  .menu-toggle {
    display: flex;
  }
  .dashboard-grid {
    display: flex;
    flex-direction: column;
    gap: 20px;
  }
  .feed-column {
    width: 100%;
  }
  .sidebar-column {
    width: 100%;
  }
  .floating-create-btn {
    right: 16px;
    bottom: 16px;
    padding: 0.55rem 0.9rem;
    font-size: 0.8rem;
  }
  .dashboard-topbar {
    grid-template-columns: 1fr;
    gap: 12px;
    padding: 12px 16px;
  }
  .dashboard-search input {
    width: 100%;
  }
  .challenge-card {
    padding: 0;
  }
  .challenge-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  .challenge-stats {
    flex-direction: column;
    gap: 10px;
  }
  .challenge-actions {
    display: flex;
    gap: 8px;
    width: 100%;
  }
  .section-head {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
  .leaderboard-table {
    font-size: 0.8rem;
  }
  .leaderboard-table th,
  .leaderboard-table td {
    padding: 8px 10px;
  }
  .leaderboard-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .profile-meta {
    flex-wrap: wrap;
    gap: 10px;
  }
  .profile-grid {
    grid-template-columns: 1fr;
  }
  .profile-hero {
    flex-direction: column;
  }
  .profile-avatar-col {
    width: 100%;
    flex-direction: row;
    align-items: center;
  }
  .profile-meta-row {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
  }
  .meta-chip {
    min-width: 0;
  }
  .badge-showcase {
    grid-template-columns: 1fr;
  }
  .modal-card {
    margin: 10px;
    padding: 18px;
  }
  .field-grid {
    grid-template-columns: 1fr;
  }
  .container {
    width: min(100% - 16px, 1200px);
  }
  .auth-container {
    flex-direction: column;
  }
  .auth-left {
    min-height: 220px;
    flex: none;
  }
  .auth-right {
    min-height: auto;
    padding: 28px 16px;
    flex: 1;
  }
  .auth-left .brand-text {
    font-size: 1.6rem;
  }
  .auth-left-subtitle {
    font-size: 0.9rem;
    max-width: 260px;
  }
  .auth-right {
    padding: 28px 16px;
    flex: 1;
  }
  .auth-form-wrapper {
    max-width: 100%;
  }
  .hero {
    padding: 56px 0 36px;
  }
  .hero-copy h1 {
    font-size: clamp(2rem, 5vw, 3rem);
  }
}

@media (max-width: 480px) {
  .leaderboard-stats {
    grid-template-columns: 1fr;
  }
  .profile-meta-row {
    grid-template-columns: 1fr;
  }
  .brand-mark-icon {
    width: 34px;
    height: 34px;
    font-size: 0.9rem;
  }
  .brand-text {
    font-size: 1rem;
  }
  .sidebar-link span {
    display: inline;
  }
  .sidebar-links {
    justify-content: flex-start;
  }
  .sidebar-nav {
    padding: 10px 12px;
    gap: 8px;
  }
  .floating-create-btn {
    padding: 0.45rem 0.8rem;
    font-size: 0.7rem;
  }
}

/* Media download overlay (EXIF/metadata challenges) */
.media-wrapper {
  position: relative;
  display: block;
  width: 100%;
  max-width: 100%;
}
.media-wrapper img,
.media-wrapper video {
  display: block;
  width: 100%;
  height: auto;
  max-height: 480px;
  object-fit: contain;
  border-radius: 8px;
  background: #0d1117;
}
.media-download-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: rgba(13, 17, 23, 0.85);
  color: #58a6ff;
  border: 1px solid rgba(88, 166, 255, 0.4);
  border-radius: 6px;
  font-size: 0.8rem;
  font-weight: 500;
  text-decoration: none;
  backdrop-filter: blur(4px);
  transition: background 0.15s, border-color 0.15s, transform 0.15s;
  z-index: 2;
  cursor: pointer;
}
.media-download-btn:hover {
  background: rgba(88, 166, 255, 0.15);
  border-color: #58a6ff;
  color: #79c0ff;
  transform: translateY(-1px);
}
.media-download-btn i {
  font-size: 0.85rem;
}

/* Solution walkthrough box (visible only to solvers / author / admin) */
.walkthrough-box {
  margin: 1rem 0;
  padding: 1rem 1.2rem;
  background: linear-gradient(135deg, rgba(88, 166, 255, 0.08) 0%, rgba(63, 185, 80, 0.08) 100%);
  border: 1px solid rgba(88, 166, 255, 0.3);
  border-radius: 12px;
  white-space: pre-wrap;
  word-wrap: break-word;
  line-height: 1.6;
}
.walkthrough-header {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #58a6ff;
  font-size: 0.95rem;
  margin-bottom: 0.6rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid rgba(88, 166, 255, 0.2);
}
.walkthrough-header i {
  font-size: 1.1rem;
}
.walkthrough-body {
  color: #e6edf3;
  font-size: 0.9rem;
  white-space: pre-wrap;
}

.walkthrough-pill {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  background: rgba(88, 166, 255, 0.12);
  border: 1px solid rgba(88, 166, 255, 0.3);
  border-radius: 999px;
  color: #58a6ff;
  font-size: 0.72rem;
  font-weight: 500;
  white-space: nowrap;
}
.walkthrough-pill i {
  font-size: 0.7rem;
}