body.analytics-page {
  --bg-color: #050816;
  --surface-bg: rgba(14, 25, 48, 0.74);
  --surface-alt-bg: rgba(19, 35, 62, 0.82);
  --card-bg: linear-gradient(140deg, rgba(16, 29, 52, 0.72), rgba(8, 20, 40, 0.82));
  --stat-card-bg: linear-gradient(140deg, rgba(18, 33, 58, 0.72), rgba(8, 22, 43, 0.84));
  --border-color: rgba(139, 176, 231, 0.22);
  --text-primary: #e2edff;
  --text-secondary: #9ab4d9;
  --text-title: #f3f8ff;
  --primary: #56c8ff;
  --primary-dark: #1c85be;
  --primary-light: #6fd2ff;
  --sidebar-bg-color: rgba(8, 18, 36, 0.88);
  --sidebar-text-color: #d8e8ff;
  --sidebar-muted-text: rgba(183, 212, 255, 0.55);
  --sidebar-logo-subtitle: #a8c3e9;
  --sidebar-border-color: rgba(144, 190, 255, 0.18);
  --sidebar-hover-bg: rgba(91, 165, 255, 0.15);
  --sidebar-active-bg: rgba(91, 165, 255, 0.22);
  --sidebar-active-border: rgba(127, 209, 255, 0.95);
  --topbar-bg: rgba(9, 20, 40, 0.74);
  --topbar-border-color: rgba(143, 188, 255, 0.18);
  --outline-btn-text: #83d8ff;
  --outline-btn-border: rgba(115, 205, 255, 0.62);
  --outline-btn-bg: rgba(6, 27, 53, 0.45);
  --outline-btn-hover-bg: rgba(92, 177, 255, 0.2);
  --table-head-bg: rgba(19, 37, 66, 0.9);
  --table-head-text: #d4e6ff;
  --table-row-border: rgba(136, 178, 233, 0.16);
  --table-row-hover-bg: rgba(20, 41, 73, 0.66);
  --table-cell-color: #d5e6ff;
  --input-bg: rgba(9, 28, 51, 0.75);
  --input-border-color: rgba(146, 190, 245, 0.3);
  --input-focus-border: rgba(94, 206, 255, 0.85);
  --input-focus-ring: rgba(64, 190, 255, 0.18);
  --modal-bg: linear-gradient(160deg, rgba(12, 23, 45, 0.94), rgba(8, 17, 35, 0.96));
  --modal-border-color: rgba(140, 186, 244, 0.24);
  --modal-overlay-color: rgba(2, 7, 16, 0.68);
  --modal-text-color: #d8e9ff;
  --modal-subtitle-color: #aac7ea;
  --logout-bg: rgba(248, 113, 113, 0.14);
  --logout-hover-bg: rgba(248, 113, 113, 0.24);
  --logout-border-color: rgba(248, 113, 113, 0.4);
  --logout-text-color: #ffc5c5;
  --stat-value-color: #f5fbff;
  --stat-label-color: #add0f5;
  --analytics-icon-border: rgba(255, 255, 255, 0.16);
  --card-title-color: #f0f7ff;
  --status-guide-subtext: rgba(255, 255, 255, 0.82);
  --weak-topic-bg: rgba(21, 36, 63, 0.74);
  --weak-topic-border: rgba(156, 195, 245, 0.18);
  --weak-topic-text: #d6e8ff;
  --weak-topic-count-text: #ffd7a0;
  --weak-topic-count-bg: rgba(251, 146, 60, 0.15);
  --weak-topic-count-border: rgba(255, 189, 117, 0.46);
  --filter-label-color: #aac6ea;
  --score-pill-text: #bbf7ff;
  --score-pill-bg: rgba(56, 189, 248, 0.18);
  --score-pill-border: rgba(103, 232, 249, 0.36);
  --status-excellent-text: #b6f5d2;
  --status-excellent-bg: rgba(34, 197, 94, 0.2);
  --status-excellent-border: rgba(110, 231, 183, 0.44);
  --status-good-text: #b7ecff;
  --status-good-bg: rgba(6, 182, 212, 0.2);
  --status-good-border: rgba(103, 232, 249, 0.42);
  --status-warning-text: #ffe2a7;
  --status-warning-bg: rgba(245, 158, 11, 0.2);
  --status-warning-border: rgba(253, 224, 71, 0.44);
  --status-danger-text: #ffc8c8;
  --status-danger-bg: rgba(248, 113, 113, 0.22);
  --status-danger-border: rgba(252, 165, 165, 0.42);
  --status-empty-text: #c9d6ea;
  --status-empty-bg: rgba(148, 163, 184, 0.2);
  --status-empty-border: rgba(148, 163, 184, 0.44);
  --modal-close-color: #c7defe;
  --modal-close-hover: #ffffff;
  --modal-feedback-color: #bdd6f5;
  --spinner-track-color: rgba(170, 208, 255, 0.3);
  --spinner-head-color: #7dd3fc;
  --overview-pill-border: rgba(136, 177, 233, 0.24);
  --overview-pill-bg: rgba(15, 34, 62, 0.74);
  --overview-pill-label: #a9c6ea;
  --overview-pill-value: #f2f8ff;
  --analytics-heading-color: #e2efff;
  --chart-shell-border: rgba(126, 168, 224, 0.24);
  --chart-shell-bg: rgba(9, 25, 49, 0.7);
  --chart-grid-color: rgba(148, 187, 237, 0.24);
  --chart-axis-color: rgba(178, 210, 248, 0.5);
  --chart-label-color: #9ec6f3;
  --chart-value-color: #d8ecff;
  --chart-bar-start: rgba(103, 232, 249, 0.95);
  --chart-bar-end: rgba(59, 130, 246, 0.9);
  --weakness-tag-text: #ffd1d9;
  --weakness-tag-bg: rgba(251, 113, 133, 0.18);
  --weakness-tag-border: rgba(251, 113, 133, 0.4);
  --weakness-tag-count-color: #ffe4e7;
  --empty-state-color: #a9c3e7;
  --theme-toggle-bg: rgba(91, 165, 255, 0.14);
  --theme-toggle-hover-bg: rgba(91, 165, 255, 0.24);
  --theme-toggle-border: rgba(127, 209, 255, 0.45);
  --theme-toggle-text: #dff0ff;
  --theme-toggle-icon-bg: rgba(127, 209, 255, 0.18);
  --bg-overlay-one: rgba(40, 126, 255, 0.22);
  --bg-overlay-two: rgba(255, 126, 87, 0.15);
  --bg-gradient-start: #050816;
  --bg-gradient-mid: #08132a;
  --bg-gradient-end: #09172f;
  --glow-one-color: rgba(76, 179, 255, 0.9);
  --glow-two-color: rgba(245, 158, 11, 0.85);
  --shadow: 0 14px 30px rgba(3, 11, 24, 0.45);
  --shadow-md: 0 25px 54px rgba(3, 10, 24, 0.58);
  --bg: var(--bg-color);
  --surface: var(--surface-bg);
  --surface-alt: var(--surface-alt-bg);
  --border: var(--border-color);
  --text: var(--text-primary);
  --text-muted: var(--text-secondary);
  --sidebar-bg: var(--sidebar-bg-color);
  --sidebar-text: var(--sidebar-text-color);
  background:
    radial-gradient(circle at 12% 12%, var(--bg-overlay-one), transparent 38%),
    radial-gradient(circle at 88% 10%, var(--bg-overlay-two), transparent 42%),
    linear-gradient(165deg, var(--bg-gradient-start) 0%, var(--bg-gradient-mid) 42%, var(--bg-gradient-end) 100%);
  color: var(--text-primary);
  position: relative;
  overflow-x: hidden;
}

[data-theme="light"] body.analytics-page {
  --bg-color: #edf1f7;
  --surface-bg: rgba(255, 255, 255, 0.95);
  --surface-alt-bg: #f3f6fb;
  --card-bg: linear-gradient(145deg, rgba(255, 255, 255, 0.98), rgba(245, 249, 255, 0.96));
  --stat-card-bg: linear-gradient(145deg, rgba(255, 255, 255, 1), rgba(241, 247, 255, 0.97));
  --border-color: #98a8bc;
  --text-primary: #0f172a;
  --text-secondary: #334155;
  --text-title: #020817;
  --primary: #0b69aa;
  --primary-dark: #084878;
  --primary-light: #2083c7;
  --sidebar-bg-color: rgba(222, 231, 242, 0.95);
  --sidebar-text-color: #142235;
  --sidebar-muted-text: rgba(20, 34, 53, 0.66);
  --sidebar-logo-subtitle: #30425a;
  --sidebar-border-color: #93a8c1;
  --sidebar-hover-bg: rgba(140, 166, 196, 0.3);
  --sidebar-active-bg: rgba(89, 130, 176, 0.25);
  --sidebar-active-border: #0b69aa;
  --topbar-bg: rgba(255, 255, 255, 0.98);
  --topbar-border-color: #9aaec4;
  --outline-btn-text: #0a4f84;
  --outline-btn-border: #0b69aa;
  --outline-btn-bg: rgba(248, 251, 255, 0.94);
  --outline-btn-hover-bg: rgba(212, 228, 247, 0.95);
  --table-head-bg: #d9e4f2;
  --table-head-text: #0f172a;
  --table-row-border: #9aaec4;
  --table-row-hover-bg: rgba(221, 233, 247, 0.88);
  --table-cell-color: #0f172a;
  --input-bg: rgba(255, 255, 255, 0.98);
  --input-border-color: #8ea5bf;
  --input-focus-border: #0b69aa;
  --input-focus-ring: rgba(11, 105, 170, 0.24);
  --modal-bg: linear-gradient(150deg, rgba(255, 255, 255, 0.99), rgba(242, 247, 255, 0.97));
  --modal-border-color: #93a9c3;
  --modal-overlay-color: rgba(15, 23, 42, 0.44);
  --modal-text-color: #0f172a;
  --modal-subtitle-color: #334155;
  --logout-bg: rgba(220, 38, 38, 0.14);
  --logout-hover-bg: rgba(220, 38, 38, 0.24);
  --logout-border-color: rgba(153, 27, 27, 0.45);
  --logout-text-color: #7f1d1d;
  --stat-value-color: #0f172a;
  --stat-label-color: #334155;
  --analytics-icon-border: rgba(11, 105, 170, 0.3);
  --card-title-color: #0f172a;
  --status-guide-subtext: #334155;
  --weak-topic-bg: rgba(255, 255, 255, 0.92);
  --weak-topic-border: #9eb0c7;
  --weak-topic-text: #0f172a;
  --weak-topic-count-text: #8a2c0d;
  --weak-topic-count-bg: rgba(251, 146, 60, 0.2);
  --weak-topic-count-border: rgba(194, 65, 12, 0.5);
  --filter-label-color: #334155;
  --score-pill-text: #0f172a;
  --score-pill-bg: rgba(186, 230, 253, 0.65);
  --score-pill-border: rgba(2, 132, 199, 0.55);
  --status-excellent-text: #14532d;
  --status-excellent-bg: rgba(134, 239, 172, 0.45);
  --status-excellent-border: rgba(21, 128, 61, 0.52);
  --status-good-text: #155e75;
  --status-good-bg: rgba(165, 243, 252, 0.5);
  --status-good-border: rgba(14, 116, 144, 0.5);
  --status-warning-text: #7c2d12;
  --status-warning-bg: rgba(253, 230, 138, 0.6);
  --status-warning-border: rgba(180, 83, 9, 0.5);
  --status-danger-text: #7f1d1d;
  --status-danger-bg: rgba(254, 202, 202, 0.75);
  --status-danger-border: rgba(185, 28, 28, 0.45);
  --status-empty-text: #1e293b;
  --status-empty-bg: rgba(203, 213, 225, 0.7);
  --status-empty-border: rgba(100, 116, 139, 0.55);
  --modal-close-color: #334155;
  --modal-close-hover: #0f172a;
  --modal-feedback-color: #334155;
  --spinner-track-color: rgba(51, 65, 85, 0.24);
  --spinner-head-color: #0b69aa;
  --overview-pill-border: #93a8c1;
  --overview-pill-bg: rgba(255, 255, 255, 0.9);
  --overview-pill-label: #334155;
  --overview-pill-value: #0f172a;
  --analytics-heading-color: #0f172a;
  --chart-shell-border: #8fa5bf;
  --chart-shell-bg: rgba(255, 255, 255, 0.94);
  --chart-grid-color: rgba(71, 85, 105, 0.24);
  --chart-axis-color: rgba(51, 65, 85, 0.46);
  --chart-label-color: #334155;
  --chart-value-color: #0f172a;
  --chart-bar-start: rgba(14, 165, 233, 0.9);
  --chart-bar-end: rgba(2, 132, 199, 0.88);
  --weakness-tag-text: #7f1d1d;
  --weakness-tag-bg: rgba(254, 202, 202, 0.7);
  --weakness-tag-border: rgba(185, 28, 28, 0.45);
  --weakness-tag-count-color: #991b1b;
  --empty-state-color: #334155;
  --theme-toggle-bg: rgba(15, 23, 42, 0.08);
  --theme-toggle-hover-bg: rgba(15, 23, 42, 0.18);
  --theme-toggle-border: rgba(15, 23, 42, 0.36);
  --theme-toggle-text: #0f172a;
  --theme-toggle-icon-bg: rgba(11, 105, 170, 0.16);
  --bg-overlay-one: rgba(31, 132, 205, 0.14);
  --bg-overlay-two: rgba(255, 153, 102, 0.1);
  --bg-gradient-start: #edf1f7;
  --bg-gradient-mid: #eef3fa;
  --bg-gradient-end: #e6edf6;
  --glow-one-color: rgba(11, 105, 170, 0.38);
  --glow-two-color: rgba(249, 115, 22, 0.34);
  --shadow: 0 12px 28px rgba(15, 23, 42, 0.14);
  --shadow-md: 0 20px 42px rgba(15, 23, 42, 0.22);
}

.page-glow {
  position: fixed;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  filter: blur(14px);
  opacity: 0.34;
  pointer-events: none;
  z-index: 0;
}

.glow-one {
  top: -110px;
  inset-inline-end: -80px;
  background: radial-gradient(circle, var(--glow-one-color), rgba(76, 179, 255, 0));
}

.glow-two {
  bottom: -90px;
  inset-inline-start: -120px;
  background: radial-gradient(circle, var(--glow-two-color), rgba(245, 158, 11, 0));
}

.analytics-page .admin-layout,
.analytics-page .main-content,
.analytics-page .sidebar {
  position: relative;
  z-index: 1;
}

.analytics-page .sidebar,
.analytics-page .topbar,
.analytics-page .card,
.analytics-page .stat-card,
.analytics-page .modal {
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.analytics-page .sidebar {
  border-inline-start: 1px solid var(--sidebar-border-color);
  box-shadow: var(--shadow);
}

.analytics-page .sidebar-logo {
  border-bottom-color: var(--sidebar-border-color);
}

.analytics-page .sidebar-logo h1 {
  color: var(--text-title);
}

.analytics-page .sidebar-logo span {
  color: var(--sidebar-logo-subtitle);
}

.analytics-page .nav-section-title {
  color: var(--sidebar-muted-text);
}

.analytics-page .nav-item {
  color: var(--sidebar-text-color);
  border-inline-start-color: transparent;
}

.analytics-page .nav-item:hover {
  background: var(--sidebar-hover-bg);
}

.analytics-page .nav-item.active {
  background: var(--sidebar-active-bg);
  border-inline-start-color: var(--sidebar-active-border);
}

.analytics-page .btn-logout {
  background: var(--logout-bg);
  border-color: var(--logout-border-color);
  color: var(--logout-text-color);
}

.analytics-page .btn-logout:hover {
  background: var(--logout-hover-bg);
}

.analytics-page .topbar {
  background: var(--topbar-bg);
  border-bottom-color: var(--topbar-border-color);
}

.topbar-subtitle {
  margin-top: 4px;
  font-size: 0.86rem;
  font-weight: 500;
  line-height: 1.65;
  color: var(--text-muted);
}

.analytics-page .btn-outline {
  color: var(--outline-btn-text);
  border-color: var(--outline-btn-border);
  background: var(--outline-btn-bg);
}

.analytics-page .btn-outline:hover {
  background: var(--outline-btn-hover-bg);
}

.analytics-page .theme-toggle-btn {
  width: 100%;
  margin-bottom: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--theme-toggle-border);
  background: var(--theme-toggle-bg);
  color: var(--theme-toggle-text);
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.1s ease;
}

.analytics-page .theme-toggle-btn:hover {
  background: var(--theme-toggle-hover-bg);
}

.analytics-page .theme-toggle-btn:active {
  transform: scale(0.98);
}

.analytics-page .theme-toggle-btn .theme-toggle-icon {
  width: 26px;
  height: 26px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--theme-toggle-icon-bg);
  font-size: 0.85rem;
}

.analytics-stats-grid {
  margin-bottom: 18px;
}

.analytics-stat-card {
  border: 1px solid var(--border-color);
  background: var(--stat-card-bg);
  box-shadow: var(--shadow);
  opacity: 0;
  transform: translateY(22px);
  animation: rise-in 0.5s ease forwards;
  animation-delay: calc(var(--card-index, 0) * 0.08s);
}

.analytics-icon {
  border: 1px solid var(--analytics-icon-border);
}

.analytics-icon.cyan {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.35), rgba(14, 165, 233, 0.3));
}

.analytics-icon.lime {
  background: linear-gradient(135deg, rgba(34, 197, 94, 0.32), rgba(16, 185, 129, 0.26));
}

.analytics-icon.amber {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.33), rgba(251, 191, 36, 0.25));
}

.analytics-icon.violet {
  background: linear-gradient(135deg, rgba(167, 139, 250, 0.36), rgba(96, 165, 250, 0.25));
}

.analytics-page .stat-info .value {
  color: var(--stat-value-color);
}

.analytics-page .stat-info .label {
  color: var(--stat-label-color);
}

.analytics-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-bottom: 16px;
}

.analytics-card {
  border: 1px solid var(--border-color);
  background: var(--card-bg);
}

.analytics-page .card-title {
  color: var(--card-title-color);
}

.status-guide-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.status-guide-item {
  border-radius: 12px;
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 3px;
  font-size: 0.9rem;
  font-weight: 500;
  line-height: 1.62;
  border: 1px solid transparent;
}

.status-guide-item span {
  font-size: 0.79rem;
  font-weight: 400;
  line-height: 1.6;
  color: var(--status-guide-subtext);
}

.status-guide-item.excellent {
  background: rgba(34, 197, 94, 0.22);
  border-color: rgba(110, 231, 183, 0.44);
}

.status-guide-item.good {
  background: rgba(56, 189, 248, 0.2);
  border-color: rgba(125, 211, 252, 0.4);
}

.status-guide-item.warning {
  background: rgba(245, 158, 11, 0.2);
  border-color: rgba(252, 211, 77, 0.4);
}

.status-guide-item.danger {
  background: rgba(248, 113, 113, 0.2);
  border-color: rgba(252, 165, 165, 0.4);
}

.weak-topic-list {
  list-style: none;
  display: grid;
  gap: 10px;
}

.weak-topic-list li {
  padding: 10px 12px;
  border-radius: 12px;
  background: var(--weak-topic-bg);
  border: 1px solid var(--weak-topic-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
}

.weak-topic-name {
  color: var(--weak-topic-text);
  font-size: 0.92rem;
  font-weight: 500;
  line-height: 1.58;
}

.weak-topic-count {
  border-radius: 999px;
  padding: 3px 10px;
  font-size: 0.79rem;
  font-weight: 500;
  border: 1px solid var(--weak-topic-count-border);
  color: var(--weak-topic-count-text);
  background: var(--weak-topic-count-bg);
}

.analytics-filter-bar {
  margin-bottom: 14px;
  gap: 14px;
}

.filter-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 170px;
}

.filter-item label {
  color: var(--filter-label-color);
  font-size: 0.83rem;
  font-weight: 500;
  line-height: 1.6;
}

.analytics-page .filter-bar select,
.analytics-page .filter-bar input {
  background: var(--input-bg);
  color: var(--text-primary);
  border-color: var(--input-border-color);
}

.analytics-page .filter-bar select:focus,
.analytics-page .filter-bar input:focus {
  border-color: var(--input-focus-border);
  box-shadow: 0 0 0 3px var(--input-focus-ring);
}

.analytics-page thead th {
  background: var(--table-head-bg);
  color: var(--table-head-text);
  border-bottom: 2px solid var(--border-color);
}

.analytics-page tbody tr {
  border-bottom: 1px solid var(--table-row-border);
}

.analytics-page tbody tr:hover {
  background: var(--table-row-hover-bg);
}

.analytics-page tbody td {
  color: var(--table-cell-color);
}

.analytics-name-cell {
  font-weight: 600;
}

.score-pill {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 3px 10px;
  background: var(--score-pill-bg);
  border: 1px solid var(--score-pill-border);
  color: var(--score-pill-text);
  font-size: 0.84rem;
  font-weight: 500;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 0.8rem;
  font-weight: 600;
  border: 1px solid transparent;
}

.status-pill.excellent {
  color: var(--status-excellent-text);
  background: var(--status-excellent-bg);
  border-color: var(--status-excellent-border);
}

.status-pill.good {
  color: var(--status-good-text);
  background: var(--status-good-bg);
  border-color: var(--status-good-border);
}

.status-pill.warning {
  color: var(--status-warning-text);
  background: var(--status-warning-bg);
  border-color: var(--status-warning-border);
}

.status-pill.danger {
  color: var(--status-danger-text);
  background: var(--status-danger-bg);
  border-color: var(--status-danger-border);
}

.status-pill.no-data {
  color: var(--status-empty-text);
  background: var(--status-empty-bg);
  border-color: var(--status-empty-border);
}

.analytics-modal-overlay {
  background: var(--modal-overlay-color);
}

.analytics-modal {
  max-width: 980px;
  width: calc(100% - 24px);
  background: var(--modal-bg);
  border: 1px solid var(--modal-border-color);
  color: var(--modal-text-color);
}

.analytics-modal .modal-title {
  margin-bottom: 12px;
  align-items: flex-start;
}

.analytics-modal .modal-title h2 {
  margin: 0;
  font-size: 1.06rem;
}

.analytics-modal .modal-title p {
  margin-top: 5px;
  font-size: 0.86rem;
  line-height: 1.66;
  color: var(--modal-subtitle-color);
}

.analytics-page .modal-close {
  color: var(--modal-close-color);
}

.analytics-page .modal-close:hover {
  color: var(--modal-close-hover);
}

.modal-feedback {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 4px 2px;
  color: var(--modal-feedback-color);
}

.spinner {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 3px solid var(--spinner-track-color);
  border-top-color: var(--spinner-head-color);
  animation: spin 0.8s linear infinite;
}

.student-overview-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.overview-pill {
  border: 1px solid var(--overview-pill-border);
  background: var(--overview-pill-bg);
  border-radius: 12px;
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.overview-pill span {
  color: var(--overview-pill-label);
  font-size: 0.78rem;
  font-weight: 500;
  line-height: 1.6;
}

.overview-pill strong {
  color: var(--overview-pill-value);
  font-size: 1.06rem;
  line-height: 1.5;
}

.analytics-block {
  margin-top: 16px;
}

.analytics-block h3 {
  margin-bottom: 10px;
  font-size: 1.02rem;
  font-weight: 700;
  line-height: 1.55;
  color: var(--analytics-heading-color);
}

.chart-shell {
  height: 250px;
  border-radius: 14px;
  border: 1px solid var(--chart-shell-border);
  background: var(--chart-shell-bg);
  padding: 12px;
}

#student-progress-chart {
  width: 100%;
  height: 100%;
  display: block;
}

.weakness-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.weakness-tag {
  border-radius: 999px;
  padding: 6px 11px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--weakness-tag-text);
  background: var(--weakness-tag-bg);
  border: 1px solid var(--weakness-tag-border);
}

.weakness-tag-count {
  margin-inline-start: 4px;
  color: var(--weakness-tag-count-color);
  font-size: 0.74rem;
}

.analytics-page .alert-error {
  background: rgba(248, 113, 113, 0.18);
  border: 1px solid rgba(252, 165, 165, 0.5);
  color: #ffd1d1;
}

.analytics-page .alert-success {
  background: rgba(74, 222, 128, 0.18);
  border: 1px solid rgba(110, 231, 183, 0.54);
  color: #d6ffe6;
}

[data-theme="light"] .analytics-page .alert-error {
  background: rgba(254, 226, 226, 0.95);
  border-color: rgba(185, 28, 28, 0.35);
  color: #7f1d1d;
}

[data-theme="light"] .analytics-page .alert-success {
  background: rgba(220, 252, 231, 0.96);
  border-color: rgba(21, 128, 61, 0.36);
  color: #14532d;
}

.full-span {
  grid-column: 1 / -1;
}

.matrix-summary-group {
  justify-content: flex-end;
}

.matrix-summary {
  border-radius: 10px;
  border: 1px dashed var(--input-border-color);
  background: rgba(13, 29, 54, 0.58);
  padding: 10px 12px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-title);
}

.matrix-summary.ok {
  border-color: rgba(52, 211, 153, 0.66);
  color: #c8ffe8;
}

.matrix-summary.warn {
  border-color: rgba(251, 191, 36, 0.6);
  color: #ffe8b6;
}

.difficulty-matrix-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.difficulty-item {
  border-radius: 12px;
  border: 1px solid var(--input-border-color);
  background: rgba(8, 22, 43, 0.58);
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.difficulty-item span {
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text-title);
}

.difficulty-item input {
  width: 100%;
}

.exam-create-actions {
  align-items: center;
  gap: 12px;
  margin-top: 16px;
}

.generate-loading {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  font-size: 0.88rem;
}

.mini-spinner {
  width: 18px;
  height: 18px;
  border-width: 2px;
  margin: 0;
}

.status-live {
  background: rgba(34, 197, 94, 0.2);
  color: #c9ffe0;
  border: 1px solid rgba(74, 222, 128, 0.46);
}

.status-scheduled {
  background: rgba(56, 189, 248, 0.2);
  color: #c7f1ff;
  border: 1px solid rgba(125, 211, 252, 0.48);
}

.status-expired {
  background: rgba(251, 146, 60, 0.2);
  color: #ffe2bf;
  border: 1px solid rgba(253, 186, 116, 0.5);
}

[data-theme="light"] .matrix-summary {
  background: rgba(255, 255, 255, 0.96);
}

[data-theme="light"] .matrix-summary.ok {
  color: #166534;
}

[data-theme="light"] .matrix-summary.warn {
  color: #92400e;
}

[data-theme="light"] .difficulty-item {
  background: rgba(255, 255, 255, 0.95);
}

.empty-state {
  color: var(--empty-state-color);
  font-size: 0.9rem;
  line-height: 1.7;
}

.empty-state-cell {
  text-align: center;
  color: var(--empty-state-color);
  padding: 26px;
}

.is-hidden {
  display: none !important;
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@media (min-width: 900px) {
  .analytics-grid {
    grid-template-columns: 1.3fr 1fr;
  }
}

@media (max-width: 980px) {
  .analytics-page .admin-layout {
    grid-template-columns: 1fr;
    grid-template-areas:
      "sidebar"
      "main";
  }

  .analytics-page .sidebar {
    position: static;
    width: 100%;
    height: auto;
    border-inline-start: none;
    border-bottom: 1px solid var(--sidebar-border-color);
  }

  .analytics-page .main-content {
    margin: 0;
    width: auto;
  }

  .analytics-page .topbar {
    padding: 14px 16px;
    flex-wrap: wrap;
    gap: 10px;
  }

  .analytics-page .page-body {
    padding: 16px;
  }

  .student-overview-grid {
    grid-template-columns: 1fr;
  }

  .chart-shell {
    height: 220px;
  }

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

@media (max-width: 640px) {
  .difficulty-matrix-grid {
    grid-template-columns: 1fr;
  }

  .exam-create-actions {
    align-items: stretch;
    flex-direction: column;
  }
}

/* Analytics Actions Cell - Two Buttons Side by Side */
.analytics-actions-cell {
  display: flex;
  gap: 8px;
  align-items: center;
  justify-content: flex-start;
  flex-wrap: wrap;
}

.analytics-actions-cell .btn-sm {
  font-size: 0.8rem;
  padding: 6px 12px;
  white-space: nowrap;
  min-width: auto;
}

.analytics-actions-cell .btn-outline {
  flex: 0 0 auto;
}

/* Responsive: Stack buttons on smaller screens */
@media (max-width: 768px) {
  .analytics-actions-cell {
    flex-direction: column;
    gap: 6px;
  }
  
  .analytics-actions-cell .btn-sm {
    width: 100%;
  }
}