@charset "UTF-8";

:root {
  --bg-main:
    radial-gradient(circle at top right, rgba(56, 189, 248, 0.24), transparent 18%),
    radial-gradient(circle at bottom left, rgba(129, 140, 248, 0.22), transparent 20%),
    linear-gradient(135deg, #eef8ff 0%, #e6f2ff 38%, #eef2ff 100%);
  --glass: rgba(255, 255, 255, 0.76);
  --panel: rgba(255, 255, 255, 0.9);
  --text: #132238;
  --muted: #5f6f83;
  --line: rgba(18, 34, 56, 0.1);
  --primary: #1d4ed8;
  --danger: #dc2626;
  --accent: #0ea5e9;
  --glass-strong: rgba(255, 255, 255, 0.42);
  --glass-soft: rgba(255, 255, 255, 0.16);
  --shadow-soft: 0 20px 50px rgba(14, 25, 47, 0.12);
  --shadow-strong: 0 28px 70px rgba(15, 23, 42, 0.16);
}

body {
  margin: 0;
  font-family: "Be Vietnam Pro", "Segoe UI", sans-serif;
  background: var(--bg-main);
  color: var(--text);
  transition: background 0.3s ease, color 0.3s ease;
  position: relative;
  overflow-x: hidden;
}

body::before,
body::after {
  content: "";
  position: fixed;
  inset: auto;
  pointer-events: none;
  z-index: 0;
  border-radius: 999px;
  filter: blur(90px);
  opacity: 0.75;
}

body::before {
  top: -120px;
  right: -120px;
  width: 320px;
  height: 320px;
  background: rgba(56, 189, 248, 0.18);
}

body::after {
  bottom: -140px;
  left: -100px;
  width: 360px;
  height: 360px;
  background: rgba(99, 102, 241, 0.16);
}

body.dark {
  --glass: rgba(12, 18, 34, 0.8);
  --panel: rgba(15, 23, 42, 0.9);
  --text: #eff6ff;
  --muted: #9fb3c8;
  --line: rgba(148, 163, 184, 0.2);
  --primary: #60a5fa;
  --danger: #f87171;
  --accent: #38bdf8;
  --glass-strong: rgba(9, 15, 29, 0.42);
  --glass-soft: rgba(9, 15, 29, 0.16);
  --shadow-soft: 0 20px 50px rgba(2, 6, 23, 0.4);
  --shadow-strong: 0 28px 70px rgba(2, 6, 23, 0.52);
  background:
    radial-gradient(circle at top right, rgba(56, 189, 248, 0.18), transparent 18%),
    radial-gradient(circle at bottom left, rgba(59, 130, 246, 0.18), transparent 20%),
    linear-gradient(135deg, #09111f 0%, #111b34 45%, #10263c 100%);
}

.layout {
  display: grid;
  grid-template-columns: 296px minmax(0, 1fr);
  min-height: 100vh;
  position: relative;
  z-index: 1;
  align-items: start;
}

.sidebar {
  display: grid;
  grid-template-rows: auto auto 1fr auto;
  gap: clamp(10px, 1.6vh, 16px);
  position: sticky;
  top: 0;
  height: 100dvh;
  overflow: hidden;
  padding: clamp(16px, 2vh, 24px) clamp(16px, 1.5vw, 22px);
  background:
    linear-gradient(180deg, rgba(7, 14, 28, 0.9), rgba(10, 29, 46, 0.74)),
    rgba(8, 15, 30, 0.68);
  backdrop-filter: blur(18px);
  color: white;
  border-right: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: inset -1px 0 0 rgba(255, 255, 255, 0.05);
}

.brand-block {
  padding: 2px;
}

.brand-kicker {
  color: rgba(191, 219, 254, 0.8);
}

.brand-kicker,
.section-label,
.eyebrow,
.class-tag {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 12px;
}

.brand-block h1 {
  margin: 6px 0 0;
  font-family: "Be Vietnam Pro", "Segoe UI", sans-serif;
  font-size: clamp(22px, 3vh, 28px);
  line-height: 1.02;
  letter-spacing: -0.04em;
}

.role-panel,
.hero-panel,
.stat-card,
.panel,
.class-card {
  border: 1px solid var(--line);
  box-shadow: var(--shadow-soft);
}

.role-panel {
  background:
    linear-gradient(180deg, rgba(255,255,255,0.12), rgba(255,255,255,0.05)),
    rgba(255, 255, 255, 0.05);
  border-radius: 22px;
  padding: clamp(12px, 1.8vh, 18px);
  margin: 0;
  backdrop-filter: blur(18px);
}

.role-panel p {
  margin: 8px 0 0;
  color: rgba(255, 255, 255, 0.82);
  line-height: 1.45;
  font-size: 14px;
}

.role-badge {
  display: inline-flex;
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: rgba(255, 255, 255, 0.16);
}

.role-badge[data-role="admin"] { background: #f97316; }
.role-badge[data-role="teacher"] { background: #2563eb; }
.role-badge[data-role="student"] { background: #16a34a; }

.nav-list,
.sidebar-tools {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.sidebar-tools {
  margin-top: auto;
  padding-top: 10px;
  width: 100%;
}

.nav-btn,
.tool-btn,
.logout-btn,
.primary-btn,
.secondary-btn,
.mini-btn,
.contact-card {
  transition: transform 0.12s ease, background 0.25s ease, opacity 0.25s ease;
}

.nav-btn,
.tool-btn {
  border: none;
  background: transparent;
  color: #edf4ff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  text-align: left;
  padding: 10px 12px;
  border-radius: 14px;
  cursor: pointer;
  box-sizing: border-box;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.2;
  border: 1px solid transparent;
  min-height: 44px;
}

.nav-btn.active,
.nav-btn:hover,
.tool-btn:hover,
.tool-btn.music-on {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.12);
}

.tool-btn {
  background: rgba(255, 255, 255, 0.04);
}

.nav-btn.active {
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.16);
}

.main {
  padding: 28px;
  background: transparent;
  min-height: 100vh;
  min-width: 0;
}

.main > .topbar,
.main > .page {
  width: min(100%, 1500px);
  max-width: 1500px;
}

.topbar,
.section-head,
.action-row,
.chat-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-start;
}

.topbar {
  margin-bottom: 24px;
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background:
    linear-gradient(180deg, rgba(255,255,255,0.18), rgba(255,255,255,0.06)),
    rgba(255,255,255,0.42);
  backdrop-filter: blur(18px) saturate(130%);
  -webkit-backdrop-filter: blur(18px) saturate(130%);
  box-shadow: var(--shadow-soft);
}

body.dark .topbar {
  background: rgba(15, 23, 42, 0.46);
}

.topbar h2 {
  margin: 6px 0 0;
  font-family: "Be Vietnam Pro", "Segoe UI", sans-serif;
  font-size: clamp(28px, 3vw, 36px);
  letter-spacing: -0.04em;
}

.logout-btn,
.primary-btn,
.secondary-btn,
.mini-btn {
  border: none;
  cursor: pointer;
  border-radius: 16px;
  padding: 12px 18px;
  font: inherit;
  font-weight: 700;
}

.logout-btn { background: var(--danger); color: white; }
.primary-btn { background: var(--primary); color: white; }
.secondary-btn { background: rgba(148, 163, 184, 0.2); color: var(--text); }
.mini-btn { background: rgba(59, 130, 246, 0.14); color: var(--primary); padding: 9px 12px; }
.danger-btn { background: rgba(239, 68, 68, 0.14); color: var(--danger); }

.logout-btn:disabled,
.primary-btn:disabled,
.secondary-btn:disabled,
.mini-btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

.nav-btn:active,
.tool-btn:active,
.logout-btn:active,
.primary-btn:active,
.secondary-btn:active,
.mini-btn:active,
.contact-card:active {
  transform: scale(0.97);
}

.hidden { display: none !important; }

.page {
  display: none;
  animation: pop 0.28s ease;
}

.page.active { display: block; }

.page.active.overview-page {
  display: grid;
  gap: 22px;
  align-content: start;
}

.overview-page .stats-grid,
.overview-page .command-grid,
.overview-page .premium-grid,
.overview-page .two-column {
  margin-bottom: 0;
}

.hero-panel {
  display: flex;
  justify-content: space-between;
  gap: 28px;
  overflow: hidden;
  position: relative;
  padding: 30px;
  border-radius: 36px;
  background:
    radial-gradient(circle at top right, rgba(255, 255, 255, 0.58), transparent 20%),
    radial-gradient(circle at bottom left, rgba(14, 165, 233, 0.16), transparent 30%),
    linear-gradient(140deg, rgba(255,255,255,0.22), rgba(255,255,255,0.06)),
    rgba(255,255,255,0.5);
  backdrop-filter: blur(18px) saturate(130%);
  -webkit-backdrop-filter: blur(18px) saturate(130%);
  margin-bottom: 22px;
  box-shadow: var(--shadow-strong);
}

body.dark .hero-panel {
  background:
    radial-gradient(circle at top right, rgba(96, 165, 250, 0.24), transparent 24%),
    linear-gradient(135deg, rgba(15,23,42,0.96), rgba(18,35,62,0.92));
}

.hero-panel.compact {
  margin-bottom: 20px;
}

.hero-panel h3 {
  font-family: "Be Vietnam Pro", "Segoe UI", sans-serif;
  font-size: clamp(24px, 2.5vw, 34px);
  margin: 8px 0 10px;
  max-width: 820px;
  line-height: 1.1;
  letter-spacing: -0.05em;
}

.hero-panel p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.hero-glow {
  width: 260px;
  min-width: 260px;
  border-radius: 999px;
  background: radial-gradient(circle, rgba(14,165,233,0.5) 0%, rgba(37,99,235,0.18) 45%, transparent 72%);
  filter: blur(14px);
}

.stats-grid,
.command-grid,
.premium-grid,
.two-column,
.detail-grid,
.chat-layout {
  display: grid;
  gap: 22px;
  align-items: start;
}

.overview-page > *,
.command-grid > *,
.premium-grid > *,
.two-column > * {
  min-width: 0;
}

.stats-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-bottom: 22px;
}

.command-grid {
  grid-template-columns: minmax(0, 1.32fr) minmax(320px, 0.92fr);
  grid-template-areas:
    "feature pulse"
    "feature spotlight";
  align-items: stretch;
  margin-bottom: 22px;
}

.premium-grid {
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  margin-bottom: 22px;
}

.two-column,
.detail-grid {
  grid-template-columns: minmax(320px, 420px) minmax(0, 1fr);
  margin-bottom: 22px;
}

.chat-layout {
  grid-template-columns: minmax(290px, 340px) minmax(0, 1fr);
}

.command-grid > :nth-child(1) {
  grid-area: feature;
}

.command-grid > :nth-child(2) {
  grid-area: pulse;
}

.command-grid > :nth-child(3) {
  grid-area: spotlight;
}

.overview-page > .two-column {
  grid-template-columns: minmax(0, 1.15fr) minmax(340px, 0.85fr);
}

.stat-card,
.panel,
.class-card {
  background: var(--panel);
  border-radius: 28px;
  box-shadow: var(--shadow-soft);
}

.stat-card {
  padding: 24px 24px 22px;
  position: relative;
  overflow: hidden;
}

.stat-card::after {
  content: "";
  position: absolute;
  inset: auto -40px -48px auto;
  width: 120px;
  height: 120px;
  border-radius: 999px;
  background: radial-gradient(circle, rgba(14, 165, 233, 0.18), transparent 70%);
}

.stat-card span {
  display: block;
  font-family: "Be Vietnam Pro", "Segoe UI", sans-serif;
  font-size: 38px;
  font-weight: 800;
  letter-spacing: -0.05em;
}

.stat-card p,
.muted-text,
.leaderboard-user p,
.item-meta small,
.class-card p {
  color: var(--muted);
}

.panel {
  padding: 24px;
}

.feature-panel {
  position: relative;
  overflow: hidden;
  padding: 26px;
  border-radius: 30px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background:
    radial-gradient(circle at top right, rgba(255, 255, 255, 0.24), transparent 20%),
    linear-gradient(135deg, rgba(14, 165, 233, 0.14), rgba(37, 99, 235, 0.14) 48%, rgba(15, 23, 42, 0.04) 100%);
  box-shadow: var(--shadow-strong);
}

body.dark .feature-panel {
  background:
    radial-gradient(circle at top right, rgba(147, 197, 253, 0.22), transparent 20%),
    linear-gradient(135deg, rgba(8, 47, 73, 0.92), rgba(30, 41, 59, 0.86));
}

.feature-panel-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-start;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 7px 12px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  background: rgba(15, 23, 42, 0.08);
}

.status-pill.live {
  background: rgba(16, 185, 129, 0.16);
  color: #15803d;
}

body.dark .status-pill.live {
  color: #86efac;
}

.quick-action-grid,
.recommendation-grid,
.metric-stack,
.timeline-feed {
  display: grid;
  gap: 14px;
}

.quick-action-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 22px;
}

.quick-action-card,
.metric-card,
.timeline-node,
.recommendation-card {
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.74);
  color: var(--text);
}

body.dark .quick-action-card,
body.dark .metric-card,
body.dark .timeline-node,
body.dark .recommendation-card {
  background: rgba(8, 14, 28, 0.72);
}

.quick-action-card {
  display: grid;
  gap: 10px;
  text-align: left;
  padding: 18px 18px 20px;
  cursor: pointer;
  min-height: 112px;
  transition: transform 0.18s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.quick-action-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 30px rgba(15, 23, 42, 0.08);
  border-color: rgba(37, 99, 235, 0.18);
}

.quick-action-card strong,
.recommendation-card strong,
.metric-card strong {
  font-size: 17px;
}

.quick-action-card span,
.recommendation-card p,
.timeline-node p,
.metric-card p {
  color: var(--muted);
  line-height: 1.55;
}

.spotlight-panel,
.premium-panel {
  min-height: 100%;
}

.overview-page .feature-panel,
.overview-page .spotlight-panel,
.overview-page .premium-panel,
.overview-page > .two-column > .panel {
  min-height: 100%;
}

.metric-card {
  padding: 18px;
}

.metric-card .metric-value {
  display: block;
  margin-top: 10px;
  font-size: 30px;
  font-weight: 800;
  color: var(--primary);
}

.recommendation-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.recommendation-card {
  padding: 20px;
}

.recommendation-card .rec-tag {
  display: inline-flex;
  padding: 6px 10px;
  border-radius: 999px;
  margin-bottom: 12px;
  font-size: 12px;
  font-weight: 700;
  background: rgba(59, 130, 246, 0.12);
  color: var(--primary);
}

.timeline-feed {
  position: relative;
  padding-left: 18px;
}

.timeline-feed::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: var(--line);
}

.timeline-node {
  padding: 20px 20px 20px 24px;
  position: relative;
}

.timeline-node::before {
  content: "";
  position: absolute;
  left: -19px;
  top: 22px;
  width: 12px;
  height: 12px;
  border-radius: 999px;
  background: linear-gradient(135deg, #22d3ee, #2563eb);
  box-shadow: 0 0 0 8px rgba(37, 99, 235, 0.08);
}

.timeline-node time {
  display: inline-block;
  margin-bottom: 8px;
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.panel h3 {
  margin-top: 0;
  margin-bottom: 12px;
  font-size: 22px;
  letter-spacing: -0.03em;
}

.form-group {
  margin-bottom: 16px;
}

.security-summary {
  display: grid;
  gap: 12px;
  margin-bottom: 16px;
  padding: 16px 18px;
  border-radius: 20px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.56);
}

body.dark .security-summary {
  background: rgba(8, 14, 28, 0.72);
}

.security-provider-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.date-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea,
.search-input,
.chat-input-row input,
.attendance-row select {
  width: 100%;
  box-sizing: border-box;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 13px 15px;
  background:
    linear-gradient(180deg, rgba(255,255,255,0.78), rgba(255,255,255,0.52)),
    rgba(255, 255, 255, 0.74);
  color: var(--text);
  font: inherit;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.34);
}

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

body.dark .form-group input,
body.dark .form-group select,
body.dark .form-group textarea,
body.dark .search-input,
body.dark .chat-input-row input,
body.dark .attendance-row select {
  background: rgba(10, 15, 30, 0.92);
}

.list-wrap {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.list-item,
.leaderboard-item,
.contact-card,
.class-card {
  animation: slideIn 0.22s ease;
}

.list-item,
.leaderboard-item {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 18px;
  align-items: center;
  padding: 18px;
  border-radius: 22px;
  background: rgba(246, 249, 253, 0.92);
  border: 1px solid rgba(148, 163, 184, 0.16);
}

body.dark .list-item,
body.dark .leaderboard-item,
body.dark .selection-box,
body.dark .chat-box,
body.dark .contact-card,
body.dark .empty-state {
  background: rgba(8, 14, 28, 0.86);
}

body.dark .check-item,
body.dark .attendance-row,
body.dark .assignment-card,
body.dark .roster-card,
body.dark .account-card {
  background: rgba(8, 14, 28, 0.78);
  border-color: rgba(148, 163, 184, 0.14);
}

.account-card {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 22px 24px;
  border-radius: 24px;
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow-soft);
}

.account-card-head,
.account-card-foot {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-start;
}

.account-card-main h4,
.account-card-main p {
  margin: 0;
}

.account-card-main h4 {
  font-size: 20px;
  margin-bottom: 10px;
  letter-spacing: -0.03em;
}

.account-card-main p + p,
.account-card-foot p {
  margin-top: 10px;
}

.account-card-side {
  min-width: 92px;
  text-align: right;
}

.account-role {
  display: block;
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--primary);
}

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

.list-item.compact {
  grid-template-columns: 1fr auto;
}

.item-meta {
  text-align: right;
}

.item-meta span,
.item-meta small {
  display: block;
}

.item-meta span {
  font-weight: 700;
}

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

.item-actions.horizontal {
  flex-direction: row;
  padding: 0 16px 16px;
}

.class-card {
  overflow: hidden;
}

.class-card-main {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 16px;
  padding: 20px;
  cursor: pointer;
}

.class-card:hover {
  transform: translateY(-2px);
  transition: transform 0.18s ease, box-shadow 0.2s ease;
  box-shadow: 0 22px 44px rgba(15, 23, 42, 0.12);
}

.class-tag {
  color: var(--accent);
  margin: 0 0 8px;
}

.leaderboard-item {
  grid-template-columns: 60px 1fr auto;
}

.leaderboard-rank {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(14,165,233,0.18), rgba(37,99,235,0.14));
  font-weight: 800;
}

.leaderboard-score {
  font-weight: 800;
  color: var(--primary);
}

.selection-box,
.chat-box {
  display: grid;
  gap: 12px;
  max-height: 340px;
  overflow-y: auto;
  border-radius: 22px;
  border: 1px solid var(--line);
  background: rgba(246, 249, 253, 0.92);
  padding: 12px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.check-item,
.attendance-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 14px;
  align-items: center;
  padding: 14px 16px;
  border: 1px solid rgba(148, 163, 184, 0.18);
  background: rgba(255, 255, 255, 0.88);
  border-radius: 18px;
  margin-bottom: 0;
}

.check-item:last-child,
.attendance-row:last-child {
  margin-bottom: 0;
}

.student-check-item {
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr) auto;
  align-items: center;
}

.student-check-item input,
.attendance-controls select {
  accent-color: var(--primary);
}

.attendance-controls select {
  min-width: 240px;
  width: 100%;
  padding: 12px 14px;
  border-radius: 16px;
  border: 1px solid rgba(148, 163, 184, 0.22);
  background: rgba(255, 255, 255, 0.92);
  color: var(--text);
  font: inherit;
}

.check-item-body strong,
.attendance-user strong {
  display: block;
  font-size: 16px;
  margin-bottom: 4px;
}

.check-item-body p,
.check-item-meta small,
.attendance-user p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.check-item-meta,
.attendance-controls,
.attendance-user {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.check-item-meta {
  align-items: flex-end;
}

.attendance-row {
  display: grid;
  grid-template-columns: 1fr minmax(220px, 280px);
}

.status-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  width: fit-content;
  padding: 7px 12px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.02em;
  border: 1px solid transparent;
}

.status-badge.online,
.status-badge.submitted {
  color: #0f766e;
  background: rgba(16, 185, 129, 0.14);
  border-color: rgba(16, 185, 129, 0.18);
}

.status-badge.recent,
.status-badge.due {
  color: #0f62c9;
  background: rgba(59, 130, 246, 0.14);
  border-color: rgba(59, 130, 246, 0.18);
}

.status-badge.open {
  color: #155e75;
  background: rgba(6, 182, 212, 0.14);
  border-color: rgba(6, 182, 212, 0.2);
}

.status-badge.today {
  color: #7c3aed;
  background: rgba(139, 92, 246, 0.14);
  border-color: rgba(139, 92, 246, 0.18);
}

.status-badge.locked {
  color: #7c2d12;
  background: rgba(251, 146, 60, 0.14);
  border-color: rgba(251, 146, 60, 0.22);
}

.status-badge.offline,
.status-badge.missing {
  color: #64748b;
  background: rgba(148, 163, 184, 0.14);
  border-color: rgba(148, 163, 184, 0.2);
}

.status-badge.late {
  color: #b45309;
  background: rgba(245, 158, 11, 0.16);
  border-color: rgba(245, 158, 11, 0.2);
}

.assignment-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 156px;
  gap: 20px;
  align-items: start;
  padding: 22px;
  border-radius: 26px;
  border: 1px solid rgba(148, 163, 184, 0.18);
  background:
    linear-gradient(180deg, rgba(255,255,255,0.3), rgba(255,255,255,0.1)),
    rgba(246, 249, 253, 0.94);
  box-shadow: 0 18px 38px rgba(15, 23, 42, 0.08);
}

#assignmentManagerPanel,
#studentSubmissionPanel {
  position: relative;
  overflow: hidden;
}

#assignmentManagerPanel::before,
#studentSubmissionPanel::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: linear-gradient(90deg, rgba(14, 165, 233, 0.8), rgba(37, 99, 235, 0.65), rgba(59, 130, 246, 0.18));
}

#studentSubmissionPanel::before {
  background: linear-gradient(90deg, rgba(16, 185, 129, 0.8), rgba(14, 165, 233, 0.55), rgba(59, 130, 246, 0.18));
}

.submission-note {
  margin: 8px 0 14px;
  padding: 14px 16px;
  border-radius: 18px;
  border: 1px solid rgba(148, 163, 184, 0.18);
  background: linear-gradient(180deg, rgba(255,255,255,0.68), rgba(255,255,255,0.36));
  color: var(--muted);
  line-height: 1.55;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.35);
}

.submission-note.open,
.submission-note.submitted {
  color: #155e75;
  border-color: rgba(6, 182, 212, 0.2);
  background: linear-gradient(180deg, rgba(236, 254, 255, 0.95), rgba(207, 250, 254, 0.72));
}

.submission-note.due {
  color: #1d4ed8;
  border-color: rgba(59, 130, 246, 0.2);
  background: linear-gradient(180deg, rgba(239, 246, 255, 0.95), rgba(219, 234, 254, 0.72));
}

.submission-note.locked,
.submission-note.late {
  color: #9a3412;
  border-color: rgba(249, 115, 22, 0.2);
  background: linear-gradient(180deg, rgba(255, 247, 237, 0.95), rgba(255, 237, 213, 0.78));
}

body.dark .submission-note {
  background: rgba(8, 14, 28, 0.82);
  border-color: rgba(148, 163, 184, 0.14);
}

body.dark .submission-note.open,
body.dark .submission-note.submitted {
  color: #67e8f9;
  background: linear-gradient(180deg, rgba(8, 47, 73, 0.72), rgba(8, 14, 28, 0.92));
}

body.dark .submission-note.due {
  color: #93c5fd;
  background: linear-gradient(180deg, rgba(30, 64, 175, 0.42), rgba(8, 14, 28, 0.92));
}

body.dark .submission-note.locked,
body.dark .submission-note.late {
  color: #fdba74;
  background: linear-gradient(180deg, rgba(124, 45, 18, 0.52), rgba(8, 14, 28, 0.92));
}

.upload-dropzone {
  display: grid;
  gap: 12px;
  padding: 16px 18px;
  border-radius: 22px;
  border: 1px dashed rgba(37, 99, 235, 0.28);
  background:
    linear-gradient(180deg, rgba(255,255,255,0.82), rgba(255,255,255,0.56)),
    rgba(219, 234, 254, 0.26);
}

.upload-dropzone input[type="file"] {
  width: 100%;
  padding: 0;
  border: none;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.upload-dropzone input[type="file"]::file-selector-button {
  margin-right: 12px;
  border: none;
  border-radius: 999px;
  padding: 10px 14px;
  background: linear-gradient(135deg, #2563eb, #0ea5e9);
  color: white;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.upload-dropzone-copy {
  display: grid;
  gap: 6px;
}

.upload-dropzone-copy strong {
  font-size: 16px;
}

.upload-dropzone-copy span {
  color: var(--muted);
  line-height: 1.5;
}

.file-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-top: 12px;
  padding: 12px 14px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.74);
}

.file-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  border-radius: 999px;
  color: var(--primary);
  background: rgba(59, 130, 246, 0.12);
  font-weight: 700;
  text-decoration: none;
}

.file-caption {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
}

.submission-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-top: 16px;
}

.assignment-attachment {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-top: 10px;
}

.attachment-label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

body.dark .upload-dropzone {
  border-color: rgba(96, 165, 250, 0.34);
  background:
    linear-gradient(180deg, rgba(15, 23, 42, 0.92), rgba(8, 14, 28, 0.88)),
    rgba(8, 47, 73, 0.26);
}

body.dark .file-meta {
  background: rgba(8, 14, 28, 0.84);
  border-color: rgba(148, 163, 184, 0.16);
}

body.dark .file-link {
  color: #93c5fd;
  background: rgba(30, 64, 175, 0.26);
}

.compact-card {
  border-radius: 20px;
}

.assignment-card-polished {
  position: relative;
  overflow: hidden;
}

.assignment-card-polished::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  background: linear-gradient(180deg, #0ea5e9, #2563eb);
}

.assignment-card p,
.assignment-card h4 {
  margin-top: 0;
}

.assignment-main {
  min-width: 0;
}

.assignment-main p {
  margin-bottom: 10px;
  line-height: 1.6;
}

.assignment-side {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 12px;
  padding-left: 12px;
  border-left: 1px solid rgba(148, 163, 184, 0.16);
}

.assignment-card-polished .item-actions.horizontal {
  padding: 0;
  justify-content: flex-end;
  flex-wrap: wrap;
}

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

.assignment-header-row {
  justify-content: space-between;
  margin-bottom: 10px;
}

.assignment-card h4 {
  font-size: 22px;
  line-height: 1.2;
}

.assignment-card .item-meta span {
  font-weight: 700;
  color: var(--text);
}

.assignment-card .item-meta small {
  color: var(--muted);
}

.roster-card {
  background: rgba(246, 249, 253, 0.92);
}

.contact-card {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 22px;
  padding: 18px;
  background: rgba(246, 249, 253, 0.9);
  color: var(--text);
  cursor: pointer;
  text-align: left;
}

.contact-card.selected {
  background: linear-gradient(135deg, rgba(14,165,233,0.18), rgba(37,99,235,0.12));
  border-color: rgba(37, 99, 235, 0.28);
}

.chat-input-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  margin-top: 12px;
}

.chat-bubble {
  max-width: 76%;
  padding: 14px 16px;
  margin: 10px 0;
  border-radius: 22px 22px 22px 8px;
  background:
    linear-gradient(180deg, rgba(255,255,255,0.24), rgba(255,255,255,0.08)),
    rgba(14,165,233,0.12);
}

.chat-bubble.own {
  margin-left: auto;
  border-radius: 22px 22px 8px 22px;
  background:
    linear-gradient(180deg, rgba(255,255,255,0.16), rgba(255,255,255,0.06)),
    rgba(37,99,235,0.18);
}

.chat-bubble p,
.chat-bubble small {
  margin: 6px 0 0;
}

.class-detail-stats {
  display: flex;
  gap: 12px;
  align-items: center;
}

.mini-stat {
  min-width: 110px;
  text-align: center;
  padding: 18px 14px;
  border-radius: 18px;
  background:
    linear-gradient(180deg, rgba(255,255,255,0.24), rgba(255,255,255,0.1)),
    rgba(14,165,233,0.1);
}

.mini-stat span {
  display: block;
  font-size: 28px;
  font-weight: 800;
}

.back-chip {
  border: none;
  border-radius: 999px;
  padding: 10px 16px;
  margin-bottom: 14px;
  background: rgba(255,255,255,0.72);
  color: var(--text);
  cursor: pointer;
}

.empty-state {
  padding: 18px;
  border-radius: 20px;
  text-align: center;
  border: 1px dashed var(--line);
  color: var(--muted);
}

#globalLeaderboard,
#overviewClassSpotlight,
#recentActivity,
#profileClassInfo,
#accountList,
#classList,
#classMembers,
#classLeaderboard,
#classAssignments,
#attendanceHistory,
#assignmentList,
#submissionList,
#directChatContacts {
  display: grid;
  gap: 16px;
  max-height: 420px;
  overflow-y: auto;
  padding-right: 6px;
}

#classChatMessages,
#directChatMessages {
  min-height: 340px;
  max-height: 460px;
}

#availableStudents,
#attendanceStudents {
  display: grid;
  gap: 12px;
  max-height: 360px;
}

#smartRecommendations {
  max-height: 420px;
  overflow-y: auto;
  padding-right: 6px;
}

.overview-page #globalLeaderboard,
.overview-page #overviewClassSpotlight,
.overview-page #recentActivity,
.overview-page #profileClassInfo,
.overview-page #smartRecommendations {
  max-height: none;
  overflow: visible;
  padding-right: 0;
}

#globalLeaderboard::-webkit-scrollbar,
#overviewClassSpotlight::-webkit-scrollbar,
#recentActivity::-webkit-scrollbar,
#profileClassInfo::-webkit-scrollbar,
#accountList::-webkit-scrollbar,
#classList::-webkit-scrollbar,
#classMembers::-webkit-scrollbar,
#classLeaderboard::-webkit-scrollbar,
#classAssignments::-webkit-scrollbar,
#attendanceHistory::-webkit-scrollbar,
#assignmentList::-webkit-scrollbar,
#submissionList::-webkit-scrollbar,
#directChatContacts::-webkit-scrollbar,
#classChatMessages::-webkit-scrollbar,
#directChatMessages::-webkit-scrollbar,
#availableStudents::-webkit-scrollbar,
#attendanceStudents::-webkit-scrollbar,
#smartRecommendations::-webkit-scrollbar {
  width: 10px;
}

#globalLeaderboard::-webkit-scrollbar-thumb,
#overviewClassSpotlight::-webkit-scrollbar-thumb,
#recentActivity::-webkit-scrollbar-thumb,
#profileClassInfo::-webkit-scrollbar-thumb,
#accountList::-webkit-scrollbar-thumb,
#classList::-webkit-scrollbar-thumb,
#classMembers::-webkit-scrollbar-thumb,
#classLeaderboard::-webkit-scrollbar-thumb,
#classAssignments::-webkit-scrollbar-thumb,
#attendanceHistory::-webkit-scrollbar-thumb,
#assignmentList::-webkit-scrollbar-thumb,
#submissionList::-webkit-scrollbar-thumb,
#directChatContacts::-webkit-scrollbar-thumb,
#classChatMessages::-webkit-scrollbar-thumb,
#directChatMessages::-webkit-scrollbar-thumb,
#availableStudents::-webkit-scrollbar-thumb,
#attendanceStudents::-webkit-scrollbar-thumb,
#smartRecommendations::-webkit-scrollbar-thumb {
  background: rgba(100, 116, 139, 0.28);
  border-radius: 999px;
  border: 2px solid transparent;
  background-clip: padding-box;
}

.assignment-full {
  margin-top: 20px;
}

@keyframes pop {
  0% { transform: scale(0.97); opacity: 0; }
  100% { transform: scale(1); opacity: 1; }
}

@keyframes slideIn {
  from { transform: translateY(10px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

@media (max-width: 1100px) {
  .layout,
  .stats-grid,
  .command-grid,
  .premium-grid,
  .two-column,
  .detail-grid,
  .chat-layout {
    grid-template-columns: 1fr;
  }

  .topbar,
  .section-head,
  .action-row,
  .chat-head,
  .class-card-main,
  .list-item,
  .leaderboard-item,
  .chat-input-row,
  .assignment-card,
  .attendance-row,
  .account-card-head,
  .account-card-foot {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
  }

  .item-meta {
    text-align: left;
  }

  .assignment-side {
    padding-left: 0;
    border-left: none;
    align-items: flex-start;
  }

  .account-card-side,
  .account-card-actions {
    text-align: left;
    justify-content: flex-start;
  }

  .layout {
    gap: 0;
  }

  .sidebar {
    position: sticky;
    top: 0;
    z-index: 5;
    height: auto;
    overflow: visible;
    border-right: none;
    border-bottom: 1px solid rgba(255,255,255,0.12);
    padding-bottom: 18px;
  }

  .nav-list {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
  }

  .sidebar-tools {
    margin-top: 14px;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
  }
}

@media (max-width: 760px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: relative;
    top: auto;
    height: auto;
    overflow: visible;
  }

  .quick-action-grid,
  .recommendation-grid,
  .date-grid,
  .nav-list,
  .sidebar-tools {
    grid-template-columns: 1fr;
  }

  .stats-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .main,
  .sidebar {
    padding: 16px;
  }

  .topbar {
    padding: 16px;
    border-radius: 20px;
  }

  .hero-panel,
  .panel,
  .feature-panel,
  .stat-card,
  .class-card {
    border-radius: 22px;
  }

  .hero-panel {
    padding: 22px;
  }

  .feature-panel,
  .panel,
  .stat-card,
  .account-card,
  .assignment-card,
  .list-item {
    padding: 18px;
  }

  .assignment-card {
    gap: 14px;
  }

  .hero-glow {
    display: none;
  }

  .stat-card span {
    font-size: 32px;
  }

  .quick-action-card,
  .metric-card,
  .recommendation-card,
  .timeline-node,
  .list-item,
  .assignment-card,
  .contact-card {
    border-radius: 20px;
  }

  .selection-box,
  .chat-box {
    border-radius: 20px;
  }
}