/* ============================================================
   EduResource ZA – Premium Aesthetic System v2.0
   Benchmark: SimpleStudy, Hlayiso, StuDocu
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:ital,wght@0,400;0,500;0,600;0,700;0,800;1,400&family=JetBrains+Mono:wght@400;600&display=swap');

/* ── Design Tokens ─────────────────────────────────────── */
:root {
  --p-crimson:       #d6073b;
  --p-crimson-dark:  #ae0932;
  --p-crimson-glow:  rgba(214,7,59,.18);
  --p-navy:          #0f172a;
  --p-navy-2:        #1e293b;
  --p-indigo:        #6366f1;
  --p-indigo-glow:   rgba(99,102,241,.15);
  --p-emerald:       #059669;
  --p-amber:         #d97706;
  --p-purple:        #7c3aed;
  --p-blue:          #2563eb;
  --p-sky:           #0ea5e9;

  --p-surface:       #ffffff;
  --p-surface-2:     #f8f9fc;
  --p-border:        #e2e8f0;
  --p-ink:           #0f172a;
  --p-muted:         #64748b;
  --p-faint:         #94a3b8;

  --p-radius-sm:     8px;
  --p-radius:        14px;
  --p-radius-lg:     22px;
  --p-radius-xl:     32px;

  --p-shadow-sm:     0 1px 3px rgba(15,23,42,.06),0 1px 2px rgba(15,23,42,.04);
  --p-shadow:        0 4px 16px rgba(15,23,42,.08),0 1px 4px rgba(15,23,42,.04);
  --p-shadow-lg:     0 12px 40px rgba(15,23,42,.12),0 4px 16px rgba(15,23,42,.06);
  --p-shadow-xl:     0 24px 64px rgba(15,23,42,.18);

  --p-transition:    0.22s cubic-bezier(0.16,1,0.3,1);
}

.dark {
  --p-surface:       #111c2e;
  --p-surface-2:     #0b1220;
  --p-border:        #1e3448;
  --p-ink:           #e2e8f0;
  --p-muted:         #94a3b8;
  --p-faint:         #64748b;
  --p-shadow-sm:     0 1px 3px rgba(0,0,0,.3);
  --p-shadow:        0 4px 16px rgba(0,0,0,.4);
  --p-shadow-lg:     0 12px 40px rgba(0,0,0,.5);
}

/* ── Global Body Refinements ──────────────────────────── */
body {
  font-family: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1,h2,h3,h4 { letter-spacing: -0.03em; }
p { line-height: 1.7; }

/* ── Premium Resource Cards (StuDocu/SimpleStudy style) ── */
.edu-vibrant-card {
  background: var(--p-surface);
  border: 1px solid var(--p-border);
  border-radius: var(--p-radius);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  box-shadow: var(--p-shadow-sm);
  transition: box-shadow var(--p-transition), border-color var(--p-transition), transform var(--p-transition);
  position: relative;
  overflow: hidden;
}

.edu-vibrant-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(135deg, var(--p-crimson-glow), transparent 50%);
  opacity: 0;
  transition: opacity var(--p-transition);
  pointer-events: none;
}

.edu-vibrant-card:hover {
  box-shadow: var(--p-shadow-lg);
  border-color: rgba(214,7,59,.35);
  transform: translateY(-2px);
}

.edu-vibrant-card:hover::before { opacity: 1; }

.edu-card-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.edu-card-badge {
  font: 700 10px/1.3 'Plus Jakarta Sans', sans-serif;
  letter-spacing: .6px;
  text-transform: uppercase;
  padding: 3px 9px;
  border-radius: 100px;
}

.edu-card-badge.is-qp   { background: #fff1f3; color: #9f1239; border: 1px solid #fecdd3; }
.edu-card-badge.is-memo { background: #ecfdf5; color: #065f46; border: 1px solid #a7f3d0; }
.edu-card-badge.is-guide { background: #eff6ff; color: #1d4ed8; border: 1px solid #bfdbfe; }
.edu-card-badge.is-ab   { background: #fffbeb; color: #92400e; border: 1px solid #fde68a; }
.dark .edu-card-badge.is-qp   { background: #4c0519; color: #fda4af; border-color: #9f1239; }
.dark .edu-card-badge.is-memo { background: #022c22; color: #6ee7b7; border-color: #065f46; }
.dark .edu-card-badge.is-guide { background: #1e3a8a22; color: #93c5fd; border-color: #1e3a8a; }
.dark .edu-card-badge.is-ab   { background: #451a0322; color: #fcd34d; border-color: #92400e; }

.edu-card-pills {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.edu-card-pill {
  font: 600 10px/1 'Plus Jakarta Sans', sans-serif;
  padding: 3px 8px;
  border-radius: 100px;
  background: var(--p-surface-2);
  color: var(--p-muted);
  border: 1px solid var(--p-border);
}

.edu-card-main {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.edu-card-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--p-radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.edu-card-icon.is-qp   { background: #fff1f3; color: var(--p-crimson); }
.edu-card-icon.is-memo { background: #ecfdf5; color: var(--p-emerald); }
.edu-card-icon.is-guide { background: #eff6ff; color: var(--p-blue); }
.edu-card-icon.is-ab   { background: #fffbeb; color: var(--p-amber); }
.dark .edu-card-icon.is-qp   { background: #4c0519; }
.dark .edu-card-icon.is-memo { background: #022c22; }
.dark .edu-card-icon.is-guide { background: #1e3a8a22; }
.dark .edu-card-icon.is-ab   { background: #45270322; }

.edu-card-title {
  font: 600 13px/1.5 'Plus Jakarta Sans', sans-serif;
  color: var(--p-ink);
  overflow-wrap: break-word;
  hyphens: auto;
}

.edu-card-actions {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: 2px;
  padding-top: 10px;
  border-top: 1px solid var(--p-border);
}

.edu-btn-act {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font: 600 11px/1.3 'Plus Jakarta Sans', sans-serif;
  padding: 6px 10px;
  border-radius: var(--p-radius-sm);
  border: 1px solid var(--p-border);
  text-decoration: none;
  cursor: pointer;
  transition: all .15s ease;
  white-space: nowrap;
  background: var(--p-surface);
  color: var(--p-ink);
}

.edu-btn-act:hover {
  background: var(--p-surface-2);
  border-color: var(--p-crimson);
  color: var(--p-crimson);
}

.edu-btn-preview { color: var(--p-indigo); border-color: rgba(99,102,241,.3); }
.edu-btn-preview:hover { background: var(--p-indigo-glow); border-color: var(--p-indigo); color: var(--p-indigo); }

.edu-btn-split { color: var(--p-blue); border-color: rgba(37,99,235,.3); }
.edu-btn-split:hover { background: rgba(37,99,235,.08); border-color: var(--p-blue); color: var(--p-blue); }

.edu-btn-download { color: var(--p-emerald); border-color: rgba(5,150,105,.3); }
.edu-btn-download:hover { background: rgba(5,150,105,.08); border-color: var(--p-emerald); color: var(--p-emerald); }

.edu-btn-ai { color: var(--p-amber); border-color: rgba(217,119,6,.3); }
.edu-btn-ai:hover { background: rgba(217,119,6,.08); border-color: var(--p-amber); color: var(--p-amber); }

/* ── In-Page Filter Toolbar ───────────────────────────── */
.edu-filter-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  background: var(--p-surface);
  border: 1px solid var(--p-border);
  border-radius: var(--p-radius);
  padding: 12px 16px;
  margin-bottom: 20px;
  box-shadow: var(--p-shadow-sm);
}

.edu-filter-label {
  font: 700 11px/1 'Plus Jakarta Sans', sans-serif;
  letter-spacing: .5px;
  text-transform: uppercase;
  color: var(--p-faint);
  flex-shrink: 0;
  margin-right: 4px;
}

.edu-filter-chip {
  font: 600 12px/1.3 'Plus Jakarta Sans', sans-serif;
  padding: 6px 14px;
  border-radius: 100px;
  border: 1px solid var(--p-border);
  background: var(--p-surface-2);
  color: var(--p-muted);
  cursor: pointer;
  transition: all .18s ease;
  white-space: nowrap;
}

.edu-filter-chip:hover { border-color: var(--p-crimson); color: var(--p-crimson); }
.edu-filter-chip.is-active {
  background: var(--p-crimson);
  border-color: var(--p-crimson);
  color: #fff;
  box-shadow: 0 2px 8px var(--p-crimson-glow);
}

.edu-filter-count {
  font: 700 11px/1 'Plus Jakarta Sans', sans-serif;
  margin-left: auto;
  color: var(--p-muted);
}

/* ── Instant Preview Modal (Hlayiso style) ────────────── */
.edu-preview-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: flex-end;
}

.edu-preview-modal[hidden] { display: none !important; }

.edu-preview-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15,23,42,.7);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.edu-preview-container {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 1200px;
  height: 92dvh;
  margin: 0 auto;
  background: var(--p-surface);
  border-radius: var(--p-radius-lg) var(--p-radius-lg) 0 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  box-shadow: var(--p-shadow-xl);
  animation: slideUp .3s cubic-bezier(0.16,1,0.3,1) both;
}

@keyframes slideUp {
  from { transform: translateY(40px); opacity: 0; }
  to   { transform: translateY(0);    opacity: 1; }
}

.edu-preview-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 20px;
  border-bottom: 1px solid var(--p-border);
  background: var(--p-surface);
  flex-shrink: 0;
}

.edu-preview-title-wrap { display: flex; align-items: center; gap: 10px; min-width: 0; }

.edu-preview-type-badge {
  font: 700 10px/1 'Plus Jakarta Sans', sans-serif;
  letter-spacing: .5px;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 100px;
  flex-shrink: 0;
}

.edu-preview-type-badge.is-qp   { background: #fff1f3; color: #9f1239; }
.edu-preview-type-badge.is-memo { background: #ecfdf5; color: #065f46; }
.edu-preview-type-badge.is-ab   { background: #fffbeb; color: #92400e; }
.dark .edu-preview-type-badge.is-qp   { background: #4c0519; color: #fda4af; }
.dark .edu-preview-type-badge.is-memo { background: #022c22; color: #6ee7b7; }

.edu-preview-title {
  font: 700 14px/1.4 'Plus Jakarta Sans', sans-serif;
  color: var(--p-ink);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  margin: 0;
}

.edu-preview-header-actions { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }

.edu-preview-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font: 600 12px/1 'Plus Jakarta Sans', sans-serif;
  padding: 8px 14px;
  border-radius: var(--p-radius-sm);
  text-decoration: none;
  cursor: pointer;
  transition: all .15s;
  white-space: nowrap;
}

.edu-preview-btn-reader {
  background: var(--p-surface-2);
  color: var(--p-ink);
  border: 1px solid var(--p-border);
}
.edu-preview-btn-reader:hover { background: var(--p-border); }

.edu-preview-btn-download {
  background: var(--p-emerald);
  color: #fff;
  border: 1px solid var(--p-emerald);
}
.edu-preview-btn-download:hover { background: #047857; }

/* Memo toggle tabs */
.edu-preview-tabs {
  display: flex;
  gap: 0;
  border: 1px solid var(--p-border);
  border-radius: var(--p-radius-sm);
  overflow: hidden;
  background: var(--p-surface-2);
}

.edu-preview-tab {
  font: 600 11px/1 'Plus Jakarta Sans', sans-serif;
  padding: 7px 14px;
  cursor: pointer;
  border: none;
  background: transparent;
  color: var(--p-muted);
  transition: all .15s;
}
.edu-preview-tab.active {
  background: var(--p-crimson);
  color: #fff;
}
.edu-preview-tab:hover:not(.active) { background: var(--p-border); }

.edu-preview-close {
  background: var(--p-surface-2);
  border: 1px solid var(--p-border);
  border-radius: var(--p-radius-sm);
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  cursor: pointer;
  color: var(--p-muted);
  transition: all .15s;
  flex-shrink: 0;
}
.edu-preview-close:hover { background: #fff1f3; border-color: var(--p-crimson); color: var(--p-crimson); }

.edu-preview-body {
  flex: 1;
  display: flex;
  overflow: hidden;
  position: relative;
}

.edu-preview-pane {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
}

.edu-preview-pane + .edu-preview-pane {
  border-left: 2px solid var(--p-border);
}

.edu-preview-pane-label {
  font: 700 10px/1 'Plus Jakarta Sans', sans-serif;
  letter-spacing: .6px;
  text-transform: uppercase;
  color: var(--p-faint);
  padding: 8px 14px 6px;
  border-bottom: 1px solid var(--p-border);
  background: var(--p-surface-2);
}

.edu-preview-frame {
  flex: 1;
  border: none;
  width: 100%;
  height: 100%;
  display: block;
}

.edu-preview-loading {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  background: var(--p-surface);
  font: 500 13px/1.5 'Plus Jakarta Sans', sans-serif;
  color: var(--p-muted);
  z-index: 2;
}

.edu-spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--p-border);
  border-top-color: var(--p-crimson);
  border-radius: 50%;
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Study Timer Widget (SimpleStudy style) ──────────── */
.edu-timer-widget {
  position: fixed;
  top: 80px;
  right: 18px;
  z-index: 200;
  font-family: 'Plus Jakarta Sans', sans-serif;
}

.edu-timer-pill {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--p-navy);
  color: #fff;
  padding: 9px 14px;
  border-radius: 100px;
  box-shadow: 0 4px 20px rgba(15,23,42,.3);
  cursor: pointer;
  transition: all .2s;
  font-size: 13px;
  font-weight: 700;
}

.edu-timer-pill:hover { transform: scale(1.03); box-shadow: 0 6px 28px rgba(15,23,42,.4); }
.edu-timer-pill.running { background: var(--p-crimson); }

.edu-timer-ring {
  width: 22px;
  height: 22px;
  position: relative;
  flex-shrink: 0;
}

.edu-timer-ring svg {
  transform: rotate(-90deg);
  width: 22px;
  height: 22px;
}

.edu-timer-ring circle {
  fill: none;
  stroke-width: 2.5;
  stroke-linecap: round;
}

.edu-timer-ring .ring-bg { stroke: rgba(255,255,255,.2); }
.edu-timer-ring .ring-fill { stroke: #fff; transition: stroke-dashoffset .5s linear; }

.edu-timer-panel {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  background: var(--p-surface);
  border: 1px solid var(--p-border);
  border-radius: var(--p-radius);
  padding: 18px;
  width: 260px;
  box-shadow: var(--p-shadow-lg);
}

.edu-timer-panel[hidden] { display: none !important; }

.edu-timer-label {
  font: 800 22px/1 'Plus Jakarta Sans', sans-serif;
  text-align: center;
  color: var(--p-crimson);
  margin-bottom: 14px;
  font-variant-numeric: tabular-nums;
}

.edu-timer-modes {
  display: flex;
  gap: 6px;
  margin-bottom: 14px;
}

.edu-timer-mode {
  flex: 1;
  font: 600 10px/1 'Plus Jakarta Sans', sans-serif;
  padding: 7px 6px;
  border-radius: var(--p-radius-sm);
  border: 1px solid var(--p-border);
  background: var(--p-surface-2);
  color: var(--p-muted);
  text-align: center;
  cursor: pointer;
  transition: all .15s;
  white-space: nowrap;
}
.edu-timer-mode.active { background: var(--p-navy); color: #fff; border-color: var(--p-navy); }
.edu-timer-mode:hover:not(.active) { border-color: var(--p-crimson); color: var(--p-crimson); }

.edu-timer-controls {
  display: flex;
  gap: 6px;
}

.edu-timer-btn {
  flex: 1;
  font: 700 12px/1 'Plus Jakarta Sans', sans-serif;
  padding: 10px;
  border-radius: var(--p-radius-sm);
  border: 1px solid var(--p-border);
  background: var(--p-surface-2);
  color: var(--p-ink);
  cursor: pointer;
  transition: all .15s;
}

.edu-timer-btn.primary { background: var(--p-crimson); border-color: var(--p-crimson); color: #fff; }
.edu-timer-btn.primary:hover { background: var(--p-crimson-dark); }
.edu-timer-btn:hover:not(.primary) { background: var(--p-border); }

/* ── Premium Site Footer ──────────────────────────────── */
.edu-premium-footer {
  background: var(--p-navy);
  color: #e2e8f0;
  margin-top: 60px;
  padding: 56px 0 40px !important;
  padding-bottom: max(40px, env(safe-area-inset-bottom, 24px)) !important;
  font-family: 'Plus Jakarta Sans', sans-serif;
  width: 100% !important;
  max-width: 100% !important;
  margin-left: 0 !important;
  margin-right: 0 !important;
  box-sizing: border-box !important;
  position: relative !important;
  overflow: hidden !important;
}

.edu-footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
}

.edu-footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,.08);
}

@media (max-width: 1024px) {
  .edu-footer-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr)) !important;
    gap: 32px !important;
  }
  .edu-footer-brand {
    grid-column: span 3 !important;
  }
}

@media (max-width: 640px) {
  .edu-footer-grid {
    grid-template-columns: 1fr !important;
    gap: 28px !important;
  }
  .edu-footer-brand {
    grid-column: span 1 !important;
  }
}

.edu-footer-brand .footer-logo {
  display: inline-flex !important;
  align-items: center !important;
  gap: 12px !important;
  text-decoration: none !important;
  margin-bottom: 16px !important;
  line-height: 1.2 !important;
}

.edu-footer-brand .footer-logo img {
  width: 36px !important;
  height: 48px !important;
  object-fit: contain !important;
  flex-shrink: 0 !important;
}

.edu-footer-brand .footer-logo span {
  display: inline-block !important;
  font-family: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif !important;
  font-size: 19px !important;
  font-weight: 800 !important;
  letter-spacing: -0.5px !important;
  line-height: 1.2 !important;
  color: #ffffff !important;
  vertical-align: middle !important;
}

.edu-footer-brand .footer-logo b {
  display: inline !important;
  font-family: inherit !important;
  font-size: inherit !important;
  font-weight: inherit !important;
  letter-spacing: inherit !important;
  line-height: inherit !important;
  vertical-align: baseline !important;
  color: var(--p-crimson) !important;
  margin: 0 !important;
  padding: 0 !important;
}

.edu-footer-brand p {
  font: 400 13px/1.7 'Plus Jakarta Sans', sans-serif;
  color: #94a3b8;
  max-width: 300px;
}

.edu-footer-stats {
  display: flex;
  gap: 20px;
  margin-top: 20px;
}

.edu-footer-stat {
  display: flex;
  flex-direction: column;
}

.edu-footer-stat strong {
  font: 800 18px/1 'Plus Jakarta Sans', sans-serif;
  color: var(--p-crimson);
}

.edu-footer-stat span {
  font: 500 11px/1.3 'Plus Jakarta Sans', sans-serif;
  color: #64748b;
  margin-top: 3px;
}

.edu-footer-col h4 {
  font: 700 11px/1 'Plus Jakarta Sans', sans-serif;
  letter-spacing: .8px;
  text-transform: uppercase;
  color: #64748b;
  margin: 0 0 16px;
}

.edu-footer-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.edu-footer-col a {
  font: 500 13px/1.4 'Plus Jakarta Sans', sans-serif;
  color: #94a3b8;
  text-decoration: none;
  transition: color .15s;
}
.edu-footer-col a:hover { color: #fff; }

.edu-footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding: 20px 0;
}

.edu-footer-legal {
  font: 400 12px/1.6 'Plus Jakarta Sans', sans-serif;
  color: #94a3b8;
}

.edu-footer-legal a { color: #cbd5e1; text-decoration: none; }
.edu-footer-legal a:hover { color: #ffffff; text-decoration: underline; }

.edu-footer-social {
  display: flex;
  gap: 10px;
}

.edu-footer-social a {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #64748b;
  text-decoration: none;
  transition: all .15s;
  font-size: 14px;
}
.edu-footer-social a:hover { border-color: var(--p-crimson); color: var(--p-crimson); }

/* ── Trust & Curriculum Badges ─────────────────────────── */
.edu-trust-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font: 600 10px/1 'Plus Jakarta Sans', sans-serif;
  letter-spacing: .4px;
  padding: 4px 10px;
  border-radius: 100px;
  text-transform: uppercase;
}

.edu-trust-badge.verified { background: #ecfdf5; color: #065f46; border: 1px solid #a7f3d0; }
.edu-trust-badge.caps { background: #eff6ff; color: #1d4ed8; border: 1px solid #bfdbfe; }
.edu-trust-badge.sacai { background: #fdf2f8; color: #701a75; border: 1px solid #f5d0fe; }
.edu-trust-badge.ieb { background: #fff7ed; color: #9a3412; border: 1px solid #fed7aa; }
.dark .edu-trust-badge.verified { background: #022c22; color: #6ee7b7; border-color: #065f46; }
.dark .edu-trust-badge.caps { background: #1e3a8a22; color: #93c5fd; border-color: #1e3a8a; }

/* ── Section Hero Banner (Premium hub pages) ──────────── */
.edu-section-hero {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
  border-radius: var(--p-radius-lg);
  padding: 40px;
  margin-bottom: 32px;
  position: relative;
  overflow: hidden;
  color: #fff;
}

.edu-section-hero::before {
  content: '';
  position: absolute;
  top: -60px;
  right: -60px;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(214,7,59,.2) 0%, transparent 70%);
  pointer-events: none;
}

.edu-section-hero::after {
  content: '';
  position: absolute;
  bottom: -80px;
  left: 40%;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(99,102,241,.15) 0%, transparent 70%);
  pointer-events: none;
}

.edu-hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font: 700 10px/1 'Plus Jakarta Sans', sans-serif;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: #fda4af;
  background: rgba(214,7,59,.15);
  border: 1px solid rgba(214,7,59,.3);
  padding: 5px 12px;
  border-radius: 100px;
  margin-bottom: 16px;
}

.edu-hero-h1 {
  font: 800 clamp(28px,4vw,48px)/1.15 'Plus Jakarta Sans', sans-serif;
  letter-spacing: -0.04em;
  color: #fff;
  margin: 0 0 12px;
}

.edu-hero-p {
  font: 400 15px/1.7 'Plus Jakarta Sans', sans-serif;
  color: #94a3b8;
  max-width: 600px;
  margin: 0 0 24px;
}

.edu-hero-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.edu-btn-hero-primary {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font: 700 14px/1 'Plus Jakarta Sans', sans-serif;
  padding: 13px 24px;
  border-radius: var(--p-radius-sm);
  background: var(--p-crimson);
  color: #fff;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all var(--p-transition);
  box-shadow: 0 4px 14px var(--p-crimson-glow);
}
.edu-btn-hero-primary:hover { background: var(--p-crimson-dark); transform: translateY(-1px); box-shadow: 0 6px 20px var(--p-crimson-glow); }

.edu-btn-hero-secondary {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font: 600 14px/1 'Plus Jakarta Sans', sans-serif;
  padding: 12px 22px;
  border-radius: var(--p-radius-sm);
  background: rgba(255,255,255,.08);
  color: #fff;
  text-decoration: none;
  border: 1px solid rgba(255,255,255,.15);
  cursor: pointer;
  transition: all var(--p-transition);
}
.edu-btn-hero-secondary:hover { background: rgba(255,255,255,.14); }

/* ── Page-level Stats Row (StuDocu style) ─────────────── */
.edu-stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px,1fr));
  gap: 12px;
  margin-bottom: 28px;
}

.edu-stat-card {
  background: var(--p-surface);
  border: 1px solid var(--p-border);
  border-radius: var(--p-radius);
  padding: 18px;
  text-align: center;
  box-shadow: var(--p-shadow-sm);
}

.edu-stat-card strong {
  display: block;
  font: 800 24px/1 'Plus Jakarta Sans', sans-serif;
  color: var(--p-crimson);
  margin-bottom: 4px;
}

.edu-stat-card span {
  font: 500 12px/1.3 'Plus Jakarta Sans', sans-serif;
  color: var(--p-muted);
}

/* ── Responsive ───────────────────────────────────────── */
@media (max-width: 1024px) {
  .edu-footer-grid { grid-template-columns: 1fr 1fr 1fr; }
  .edu-footer-brand { grid-column: 1/-1; }
  /* Keep both persistent controls available on narrow screens without collision */
  .edu-timer-widget { top: auto !important; bottom: calc(16px + env(safe-area-inset-bottom)) !important; left: 16px !important; right: auto !important; z-index: 200 !important; }
  .edu-timer-panel { top: auto !important; bottom: calc(100% + 10px) !important; left: 0 !important; right: auto !important; }
  .edu-buddy { top: auto !important; bottom: calc(16px + env(safe-area-inset-bottom)) !important; right: 16px !important; left: auto !important; z-index: 200 !important; }
  .edu-buddy-panel { top: auto !important; bottom: calc(100% + 10px) !important; right: 0 !important; left: auto !important; }
}

@media (max-width: 768px) {
  .edu-preview-container { height: 95dvh; border-radius: 20px 20px 0 0; }
  .edu-preview-title { font-size: 12px; }
  .edu-preview-btn span { display: none; }
  .edu-footer-grid { grid-template-columns: 1fr 1fr; }
  .edu-footer-brand { grid-column: 1/-1; }
  .edu-section-hero { padding: 26px 20px; }
}

@media (max-width: 480px) {
  .edu-footer-grid { grid-template-columns: 1fr; }
  .edu-filter-toolbar { flex-direction: column; align-items: flex-start; }
  .edu-stats-row { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .edu-stat-card { min-width:0; padding:14px 10px; overflow-wrap:anywhere; }
  .edu-stat-card strong { font-size:clamp(18px,5vw,24px); }
}

.edu-examiner-archive { margin: 30px auto; padding: clamp(18px,3vw,32px); border: 1px solid var(--p-border); border-radius: 20px; background: var(--p-surface); box-shadow: var(--p-shadow); }
.edu-examiner-archive h2 { margin: 0 0 6px; color: var(--p-ink); font-size: clamp(21px,2.5vw,30px); }
.edu-examiner-archive p { margin: 0 0 20px; color: var(--p-muted); }
.edu-examiner-archive-group { margin-top: 22px; }
.edu-examiner-archive-group h3 { margin: 0 0 10px; color: var(--p-ink); font-size: 16px; }
.edu-examiner-archive-group ul { display: grid; grid-template-columns: repeat(auto-fit,minmax(min(260px,100%),1fr)); gap: 8px; margin: 0; padding: 0; list-style: none; }
.edu-examiner-archive-group li { display: flex; flex-direction: column; gap: 3px; padding: 10px 12px; border: 1px solid var(--p-border); border-radius: 10px; }
.edu-examiner-archive-group a { color: var(--p-crimson); font-size: 12px; font-weight: 700; overflow-wrap: anywhere; }
.edu-examiner-archive-group span { color: var(--p-muted); font-size: 10px; }

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

/* Focused routes from existing paper hubs into the document catalogue. */
.edu-collection-link-section{max-width:1400px;margin:44px auto;padding:clamp(22px,3vw,36px);border:1px solid var(--p-border);border-radius:22px;background:var(--p-surface);box-shadow:var(--p-shadow)}
.edu-collection-link-heading{display:flex;justify-content:space-between;align-items:end;gap:18px;margin-bottom:23px}
.edu-collection-link-kicker{font:800 10px/1.4 'Plus Jakarta Sans',sans-serif;letter-spacing:.16em;text-transform:uppercase;color:var(--p-crimson)}
.edu-collection-link-heading h2{font:800 clamp(21px,2.5vw,30px)/1.2 'Plus Jakarta Sans',sans-serif;color:var(--p-ink);margin:7px 0 5px}
.edu-collection-link-heading p{font-size:13px;color:var(--p-muted);margin:0}
.edu-collection-link-heading>a{flex-shrink:0;background:var(--p-navy);color:white;border-radius:9px;padding:11px 15px;text-decoration:none;font-size:12px;font-weight:800}
.edu-collection-link-heading>a:hover{background:var(--p-crimson)}
.edu-collection-teasers{display:grid;grid-template-columns:repeat(auto-fill,minmax(215px,1fr));gap:12px}
.edu-collection-teaser{display:flex;flex-direction:column;gap:9px;padding:17px;border:1px solid var(--p-border);border-radius:13px;background:var(--p-surface-2);text-decoration:none;transition:transform .2s,border-color .2s,box-shadow .2s}
.edu-collection-teaser:hover,.edu-collection-teaser:focus-visible{transform:translateY(-2px);border-color:var(--p-crimson);box-shadow:var(--p-shadow)}
.edu-collection-teaser span{font:800 10px/1.3 'Plus Jakarta Sans',sans-serif;letter-spacing:.06em;text-transform:uppercase;color:var(--p-muted)}
.edu-collection-teaser strong{font:750 15px/1.35 'Plus Jakarta Sans',sans-serif;color:var(--p-ink)}
.edu-collection-teaser small{margin-top:auto;color:var(--p-muted);font-size:11px}
@media(max-width:650px){.edu-collection-link-heading{display:block}.edu-collection-link-heading>a{display:inline-flex;margin-top:16px}}

/* ── Hero Section Action Buttons ──────────────────────────────────────────── */
.edu-hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 20px;
}

.edu-btn-hero-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  background: var(--p-crimson);
  color: #fff;
  border-radius: 12px;
  font: 700 13px/1.3 'Plus Jakarta Sans', sans-serif;
  text-decoration: none;
  box-shadow: 0 4px 16px rgba(214,7,59,.35);
  transition: all var(--p-transition);
  white-space: nowrap;
}
.edu-btn-hero-primary:hover {
  background: var(--p-crimson-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(214,7,59,.45);
}

.edu-btn-hero-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  background: rgba(255,255,255,.1);
  color: rgba(255,255,255,.9);
  border: 1px solid rgba(255,255,255,.2);
  border-radius: 12px;
  font: 700 13px/1.3 'Plus Jakarta Sans', sans-serif;
  text-decoration: none;
  backdrop-filter: blur(8px);
  transition: all var(--p-transition);
  white-space: nowrap;
}
.edu-btn-hero-secondary:hover {
  background: rgba(255,255,255,.18);
  border-color: rgba(255,255,255,.35);
  transform: translateY(-1px);
}

.edu-hero-h1 {
  font: 800 clamp(26px,3.2vw,42px)/1.15 'Plus Jakarta Sans', sans-serif;
  color: #fff;
  letter-spacing: -0.03em;
  margin: 6px 0 10px;
}

.edu-hero-eyebrow {
  font: 700 11px/1.4 'Plus Jakarta Sans', sans-serif;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255,255,255,.5);
}

.edu-hero-p {
  font: 400 15px/1.65 'Plus Jakarta Sans', sans-serif;
  color: rgba(255,255,255,.75);
  max-width: 600px;
  margin: 0;
}

/* ── Document Count Badges (StuDocu-inspired) ─────────────────────────────── */
.edu-doc-count-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 9px;
  background: var(--p-surface-2);
  border: 1px solid var(--p-border);
  border-radius: 20px;
  font: 600 11px/1.3 'Plus Jakarta Sans', sans-serif;
  color: var(--p-muted);
}
.edu-doc-count-badge b {
  color: var(--p-crimson);
  font-weight: 800;
}

/* ── Premium Subject Section Header ──────────────────────────────────────── */
.edu-subject-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin: 32px 0 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--p-border);
}
.edu-subject-section-header h2 {
  font: 800 18px/1.2 'Plus Jakarta Sans', sans-serif;
  color: var(--p-ink);
  margin: 0;
}
.edu-subject-section-header a {
  font: 600 12px/1 'Plus Jakarta Sans', sans-serif;
  color: var(--p-crimson);
  text-decoration: none;
}
.edu-subject-section-header a:hover { text-decoration: underline; }

/* ── Premium Filter Toolbar Upgrade ──────────────────────────────────────── */
.edu-filter-toolbar {
  background: var(--p-surface);
  border: 1px solid var(--p-border);
  border-radius: var(--p-radius);
  padding: 14px 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-bottom: 20px;
  box-shadow: var(--p-shadow-sm);
  position: sticky;
  top: 12px;
  z-index: 50;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background: rgba(255,255,255,.95);
}
.dark .edu-filter-toolbar {
  background: rgba(17,28,46,.95);
}

.edu-filter-chip {
  padding: 6px 14px;
  border: 1px solid var(--p-border);
  border-radius: 20px;
  background: var(--p-surface-2);
  color: var(--p-muted);
  font: 600 11px/1.3 'Plus Jakarta Sans', sans-serif;
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
}
.edu-filter-chip:hover {
  border-color: var(--p-crimson);
  color: var(--p-crimson);
  background: rgba(214,7,59,.05);
}
.edu-filter-chip.is-active {
  background: var(--p-crimson);
  border-color: var(--p-crimson);
  color: #fff;
  box-shadow: 0 3px 10px rgba(214,7,59,.25);
}

/* ── Card Grid System ─────────────────────────────────────────────────────── */
.edu-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 14px;
  margin-bottom: 32px;
}
@media (max-width: 640px) {
  .edu-card-grid { grid-template-columns: 1fr; }
}

/* ── Premium Card Action Buttons ─────────────────────────────────────────── */
.edu-btn-act {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 6px 10px;
  border-radius: 8px;
  font: 600 11px/1 'Plus Jakarta Sans', sans-serif;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid;
  transition: all 0.15s ease;
  white-space: nowrap;
  flex-shrink: 0;
}
.edu-btn-preview {
  background: rgba(214,7,59,.06);
  border-color: rgba(214,7,59,.2);
  color: var(--p-crimson-dark);
}
.edu-btn-preview:hover { background: var(--p-crimson); border-color: var(--p-crimson); color: #fff; }
.edu-btn-split {
  background: rgba(99,102,241,.06);
  border-color: rgba(99,102,241,.2);
  color: #4338ca;
}
.edu-btn-split:hover { background: #4338ca; border-color: #4338ca; color: #fff; }
.edu-btn-download {
  background: rgba(5,150,105,.06);
  border-color: rgba(5,150,105,.2);
  color: #047857;
}
.edu-btn-download:hover { background: #047857; border-color: #047857; color: #fff; }
.edu-btn-ai {
  background: rgba(124,58,237,.06);
  border-color: rgba(124,58,237,.2);
  color: #6d28d9;
}
.edu-btn-ai:hover { background: #6d28d9; border-color: #6d28d9; color: #fff; }

/* ── Trust Badges (Board/Curriculum Alignment) ───────────────────────────── */
.edu-trust-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 12px;
  border-radius: 20px;
  font: 700 10px/1.2 'Plus Jakarta Sans', sans-serif;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  border: 1px solid;
  white-space: nowrap;
}
.edu-trust-badge.verified { background: rgba(5,150,105,.1); border-color: rgba(5,150,105,.2); color: #047857; }
.edu-trust-badge.ieb { background: rgba(37,99,235,.1); border-color: rgba(37,99,235,.2); color: #1d4ed8; }
.edu-trust-badge.caps { background: rgba(124,58,237,.1); border-color: rgba(124,58,237,.2); color: #6d28d9; }
.edu-trust-badge.sacai { background: rgba(217,119,6,.1); border-color: rgba(217,119,6,.2); color: #b45309; }
.dark .edu-trust-badge.verified { background: rgba(5,150,105,.15); color: #34d399; }
.dark .edu-trust-badge.ieb { background: rgba(37,99,235,.15); color: #93c5fd; }
.dark .edu-trust-badge.caps { background: rgba(124,58,237,.15); color: #c4b5fd; }
.dark .edu-trust-badge.sacai { background: rgba(217,119,6,.15); color: #fcd34d; }

/* ── Mobile Timer & Buddy Separation and Reader Isolation ─────────────────── */
.edu-timer-widget {
  z-index: 200 !important;
}
body:not(.reader-page) .edu-timer-widget {
  z-index: 200;
}
body.reader-page .edu-timer-widget,
body.reader-page .edu-buddy,
body.reader-page .edu-buddy-launch,
body.reader-page .edu-buddy-panel {
  display: none !important;
}

/* ── Resource Page Quick Stats ─────────────────────────────────────────────── */
.edu-quick-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 20px 0;
  padding: 20px;
  background: var(--p-surface);
  border: 1px solid var(--p-border);
  border-radius: var(--p-radius);
}
.edu-quick-stat {
  display: flex;
  flex-direction: column;
  min-width: 80px;
}
.edu-quick-stat strong {
  font: 800 20px/1.1 'Plus Jakarta Sans', sans-serif;
  color: var(--p-crimson);
}
.edu-quick-stat span {
  font: 400 11px/1.4 'Plus Jakarta Sans', sans-serif;
  color: var(--p-muted);
  margin-top: 2px;
}

/* ── Skeleton Loading Placeholder ─────────────────────────────────────────── */
@keyframes shimmer {
  0% { background-position: -400px 0; }
  100% { background-position: 400px 0; }
}
.edu-skeleton {
  background: linear-gradient(90deg, var(--p-surface-2) 25%, var(--p-border) 50%, var(--p-surface-2) 75%);
  background-size: 800px 100%;
  animation: shimmer 1.5s infinite;
  border-radius: 8px;
}

/* ── Print Optimizations ──────────────────────────────────────────────────── */
@media print {
  .edu-timer-widget,
  .edu-preview-modal,
  .edu-filter-toolbar,
  .edu-premium-footer,
  .edu-buddy,
  .reader-assistant-launcher { display: none !important; }
  .edu-section-hero { background: #0f172a !important; -webkit-print-color-adjust: exact; }
}

/* ── Accessibility Focus Ring ─────────────────────────────────────────────── */
:focus-visible {
  outline: 3px solid var(--p-crimson);
  outline-offset: 3px;
  border-radius: 4px;
}
/* Large subject archives contain thousands of document rows. Let the browser
   skip layout and painting for off-screen years until the learner reaches them. */
.edu-year-card {
  content-visibility: auto;
  contain-intrinsic-size: auto 720px;
}

/* ==========================================================================
   Study Guide Reading Experience: Responsive & Mobile Adaptations
   ========================================================================== */
@media screen and (max-width: 850px) {
  body.edu-with-rail .page,
  .page {
    width: 100% !important;
    max-width: 100% !important;
    margin: 12px 0 20px 0 !important;
    padding: 20px 16px 36px 16px !important;
    min-height: auto !important;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06) !important;
    border-radius: 8px !important;
    page-break-after: auto !important;
  }
  .page-header {
    flex-direction: column !important;
    align-items: flex-start !important;
    gap: 4px !important;
    font-size: 8pt !important;
    padding-bottom: 6px !important;
  }
  .cover {
    padding-top: 24mm !important;
  }
  .cover h1 {
    font-size: 20pt !important;
  }
  .cover h2 {
    font-size: 14pt !important;
  }
  .formula-box {
    overflow-x: auto !important;
    -webkit-overflow-scrolling: touch !important;
    white-space: pre-wrap !important;
    word-break: break-word !important;
    font-size: 9pt !important;
    max-width: 100% !important;
  }
  .worked-example {
    overflow-x: auto !important;
    -webkit-overflow-scrolling: touch !important;
    word-break: break-word !important;
    font-size: 10pt !important;
    max-width: 100% !important;
  }
  .info-box {
    word-break: break-word !important;
    font-size: 10pt !important;
  }
  table {
    display: block !important;
    width: 100% !important;
    overflow-x: auto !important;
    -webkit-overflow-scrolling: touch !important;
  }
}

/* ── Dark Mode Adaptations for Study Notes ────────────────────────────────── */
html.dark .page,
.dark .page {
  background: var(--p-surface, #111c2e) !important;
  color: var(--p-ink, #e2e8f0) !important;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.4) !important;
}
html.dark .page h1, html.dark .page h2, html.dark .page h3, html.dark .page h4,
.dark .page h1, .dark .page h2, .dark .page h3, .dark .page h4 {
  color: #f1f5f9 !important;
}
html.dark .page-header,
.dark .page-header {
  border-bottom-color: #3b82f6 !important;
}
html.dark .page-header .left,
.dark .page-header .left {
  color: #93c5fd !important;
}
html.dark .page-header .right,
.dark .page-header .right {
  color: #94a3b8 !important;
}
html.dark .formula-box,
.dark .formula-box {
  background: #1e293b !important;
  border-color: #3b82f6 !important;
  color: #e2e8f0 !important;
}
html.dark .info-box,
.dark .info-box {
  background: #2a151b !important;
  border-left-color: #ef4444 !important;
  color: #fecaca !important;
}
html.dark .worked-example,
.dark .worked-example {
  background: #062b1a !important;
  border-color: #10b981 !important;
  color: #d1fae5 !important;
}
html.dark .worked-example h4,
.dark .worked-example h4 {
  color: #34d399 !important;
}
html.dark table th,
.dark table th {
  background-color: #1e293b !important;
  color: #e2e8f0 !important;
  border-color: #334155 !important;
}
html.dark table td,
.dark table td {
  border-color: #334155 !important;
  color: #cbd5e1 !important;
}