/* ===== PSPO Study Hub — Premium Dark UI ===== */
:root {
  --bg-0: #07070d;
  --bg-1: #0d0d18;
  --bg-2: #141428;
  --bg-3: #1c1c35;
  --glass: rgba(255, 255, 255, 0.04);
  --glass-border: rgba(255, 255, 255, 0.08);
  --text: #f0f0f8;
  --text-dim: #9898b8;
  --text-muted: #6a6a88;
  --accent: #7c5cff;
  --accent-2: #00d4aa;
  --accent-3: #ff6b9d;
  --accent-4: #ffb020;
  --accent-5: #4facfe;
  --danger: #ff5c7a;
  --success: #00d4aa;
  --warning: #ffb020;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  --font: "Be Vietnam Pro", "Inter", system-ui, sans-serif;
  --mono: "JetBrains Mono", "SF Mono", monospace;
  --nav-h: 72px;
  --sidebar-w: 280px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font);
  background: var(--bg-0);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* Animated background */
.bg-orbs {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}
.bg-orbs .orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.35;
  animation: orbFloat 20s ease-in-out infinite;
}
.orb-1 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, #7c5cff 0%, transparent 70%);
  top: -10%; left: -5%;
  animation-delay: 0s;
}
.orb-2 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, #00d4aa 0%, transparent 70%);
  bottom: 10%; right: -5%;
  animation-delay: -7s;
  opacity: 0.25;
}
.orb-3 {
  width: 350px; height: 350px;
  background: radial-gradient(circle, #ff6b9d 0%, transparent 70%);
  top: 40%; left: 50%;
  animation-delay: -14s;
  opacity: 0.2;
}
@keyframes orbFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(40px, -30px) scale(1.08); }
  66% { transform: translate(-30px, 40px) scale(0.95); }
}

/* Grid overlay */
.bg-grid {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 20%, transparent 70%);
}

/* ===== Layout ===== */
.app {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Top nav */
.topnav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
  background: rgba(7, 7, 13, 0.75);
  backdrop-filter: blur(20px) saturate(1.4);
  border-bottom: 1px solid var(--glass-border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  cursor: pointer;
  user-select: none;
}
.brand-logo {
  width: 40px; height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 0.85rem;
  box-shadow: 0 4px 20px rgba(124, 92, 255, 0.4);
  animation: logoPulse 3s ease-in-out infinite;
}
@keyframes logoPulse {
  0%, 100% { box-shadow: 0 4px 20px rgba(124, 92, 255, 0.4); }
  50% { box-shadow: 0 4px 30px rgba(0, 212, 170, 0.5); }
}
.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}
.brand-text strong {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}
.brand-text span {
  font-size: 0.7rem;
  color: var(--text-dim);
  font-weight: 500;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
}
.nav-links button {
  background: transparent;
  border: none;
  color: var(--text-dim);
  font-family: var(--font);
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.5rem 0.9rem;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.25s var(--ease);
  position: relative;
}
.nav-links button:hover {
  color: var(--text);
  background: var(--glass);
}
.nav-links button.active {
  color: var(--text);
  background: rgba(124, 92, 255, 0.15);
}
.nav-links button.active::after {
  content: "";
  position: absolute;
  bottom: 2px; left: 50%;
  transform: translateX(-50%);
  width: 16px; height: 2px;
  border-radius: 2px;
  background: var(--accent);
}

.nav-progress {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.8rem;
  color: var(--text-dim);
}
.progress-ring {
  width: 36px; height: 36px;
  position: relative;
}
.progress-ring svg {
  width: 36px; height: 36px;
  transform: rotate(-90deg);
}
.progress-ring circle {
  fill: none;
  stroke-width: 3;
}
.progress-ring .bg { stroke: var(--bg-3); }
.progress-ring .fg {
  stroke: url(#ringGrad);
  stroke-linecap: round;
  stroke-dasharray: 100;
  stroke-dashoffset: 100;
  transition: stroke-dashoffset 0.8s var(--ease);
}
.progress-ring .pct {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-size: 0.6rem;
  font-weight: 700;
  color: var(--accent-2);
}

.menu-toggle {
  display: none;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  color: var(--text);
  width: 40px; height: 40px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 1.2rem;
}

/* ===== Views ===== */
.main {
  flex: 1;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

.view {
  display: none;
  animation: viewIn 0.5s var(--ease) both;
}
.view.active { display: block; }

@keyframes viewIn {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== Home / Hero ===== */
.hero {
  text-align: center;
  padding: 3rem 0 2.5rem;
  position: relative;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  background: rgba(124, 92, 255, 0.12);
  border: 1px solid rgba(124, 92, 255, 0.3);
  color: #b8a6ff;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
  animation: fadeUp 0.6s var(--ease) both;
}
.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 1rem;
  animation: fadeUp 0.6s 0.08s var(--ease) both;
}
.hero h1 .grad {
  background: linear-gradient(135deg, #a78bfa, #00d4aa, #4facfe);
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradShift 4s ease infinite;
}
@keyframes gradShift {
  0%, 100% { background-position: 0% center; }
  50% { background-position: 100% center; }
}
.hero p {
  color: var(--text-dim);
  font-size: 1.1rem;
  max-width: 560px;
  margin: 0 auto 2rem;
  animation: fadeUp 0.6s 0.16s var(--ease) both;
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero-cta {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeUp 0.6s 0.24s var(--ease) both;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.4rem;
  border-radius: 12px;
  font-family: var(--font);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.3s var(--ease);
  text-decoration: none;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent), #5a3fd4);
  color: white;
  box-shadow: 0 4px 24px rgba(124, 92, 255, 0.4);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(124, 92, 255, 0.55);
}
.btn-ghost {
  background: var(--glass);
  color: var(--text);
  border: 1px solid var(--glass-border);
}
.btn-ghost:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.15);
  transform: translateY(-2px);
}
.btn-success {
  background: linear-gradient(135deg, var(--accent-2), #00a884);
  color: #041510;
  box-shadow: 0 4px 24px rgba(0, 212, 170, 0.35);
}
.btn-sm {
  padding: 0.45rem 0.9rem;
  font-size: 0.85rem;
  border-radius: 8px;
}

/* Exam info strip */
.exam-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin: 2.5rem 0;
  animation: fadeUp 0.6s 0.32s var(--ease) both;
}
.exam-chip {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 1.25rem 1rem;
  text-align: center;
  transition: all 0.3s var(--ease);
  position: relative;
  overflow: hidden;
}
.exam-chip::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--chip-color, var(--accent)), transparent);
  opacity: 0;
  transition: opacity 0.3s;
}
.exam-chip:hover {
  transform: translateY(-4px);
  border-color: rgba(124, 92, 255, 0.3);
  box-shadow: var(--shadow);
}
.exam-chip:hover::before { opacity: 1; }
.exam-chip .num {
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--text), var(--text-dim));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.exam-chip .lbl {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
  font-weight: 500;
}

/* Module cards */
.section-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin: 2.5rem 0 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.section-title .dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
}

.modules-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.15rem;
}
.module-card {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  cursor: pointer;
  transition: all 0.35s var(--ease);
  position: relative;
  overflow: hidden;
  animation: cardIn 0.5s var(--ease) both;
}
.module-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, color-mix(in srgb, var(--mod-color) 12%, transparent), transparent 60%);
  opacity: 0;
  transition: opacity 0.35s;
}
.module-card:hover {
  transform: translateY(-6px) scale(1.01);
  border-color: color-mix(in srgb, var(--mod-color) 40%, transparent);
  box-shadow: 0 16px 48px rgba(0,0,0,0.35), 0 0 0 1px color-mix(in srgb, var(--mod-color) 20%, transparent);
}
.module-card:hover::before { opacity: 1; }
.module-card .mod-icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  background: color-mix(in srgb, var(--mod-color) 15%, transparent);
  border: 1px solid color-mix(in srgb, var(--mod-color) 25%, transparent);
  display: grid;
  place-items: center;
  font-size: 1.5rem;
  margin-bottom: 1rem;
  transition: transform 0.35s var(--ease-spring);
  position: relative;
}
.module-card:hover .mod-icon {
  transform: scale(1.12) rotate(-4deg);
}
.module-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
  position: relative;
}
.module-card p {
  font-size: 0.875rem;
  color: var(--text-dim);
  position: relative;
}
.module-card .mod-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 1.15rem;
  position: relative;
}
.module-card .mod-progress {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 500;
}
.module-card .mod-arrow {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: color-mix(in srgb, var(--mod-color) 15%, transparent);
  display: grid;
  place-items: center;
  color: var(--mod-color);
  font-size: 0.9rem;
  transition: transform 0.3s var(--ease);
}
.module-card:hover .mod-arrow {
  transform: translateX(4px);
  background: color-mix(in srgb, var(--mod-color) 30%, transparent);
}

@keyframes cardIn {
  from { opacity: 0; transform: translateY(24px) scale(0.96); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

/* Quick actions */
.quick-actions {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 1rem;
}
.quick-card {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 1.35rem;
  cursor: pointer;
  transition: all 0.3s var(--ease);
  text-align: center;
}
.quick-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255,255,255,0.15);
  box-shadow: var(--shadow);
}
.quick-card .qa-icon { font-size: 1.8rem; margin-bottom: 0.5rem; }
.quick-card h4 { font-size: 0.95rem; font-weight: 650; margin-bottom: 0.25rem; }
.quick-card p { font-size: 0.8rem; color: var(--text-muted); }

/* ===== Module detail ===== */
.mod-header {
  margin-bottom: 2rem;
}
.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: none;
  border: none;
  color: var(--text-dim);
  font-family: var(--font);
  font-size: 0.875rem;
  cursor: pointer;
  margin-bottom: 1rem;
  padding: 0.35rem 0;
  transition: color 0.2s;
}
.back-btn:hover { color: var(--text); }

.mod-header h1 {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.mod-header h1 .icon-wrap {
  width: 56px; height: 56px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  font-size: 1.6rem;
  background: color-mix(in srgb, var(--mod-color) 18%, transparent);
  border: 1px solid color-mix(in srgb, var(--mod-color) 30%, transparent);
}
.mod-header .sub {
  color: var(--text-dim);
  margin-top: 0.5rem;
  margin-left: 4.25rem;
}

/* Section accordion */
.sections {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}
.section-item {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.3s, box-shadow 0.3s;
}
.section-item.open {
  border-color: color-mix(in srgb, var(--mod-color, var(--accent)) 35%, transparent);
  box-shadow: 0 8px 32px rgba(0,0,0,0.25);
}
.section-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.15rem 1.35rem;
  background: none;
  border: none;
  color: var(--text);
  font-family: var(--font);
  font-size: 1rem;
  font-weight: 650;
  cursor: pointer;
  text-align: left;
  transition: background 0.2s;
}
.section-toggle:hover { background: rgba(255,255,255,0.03); }
.section-num {
  width: 32px; height: 32px;
  border-radius: 10px;
  background: color-mix(in srgb, var(--mod-color, var(--accent)) 18%, transparent);
  color: var(--mod-color, var(--accent));
  display: grid;
  place-items: center;
  font-size: 0.85rem;
  font-weight: 700;
  flex-shrink: 0;
}
.section-toggle .chevron {
  margin-left: auto;
  transition: transform 0.35s var(--ease);
  color: var(--text-muted);
  font-size: 0.9rem;
}
.section-item.open .chevron { transform: rotate(180deg); }

.section-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.45s var(--ease);
}
.section-item.open .section-body {
  max-height: 5000px;
}
.section-content {
  padding: 0 1.35rem 1.5rem 1.35rem;
  color: var(--text-dim);
  border-top: 1px solid var(--glass-border);
  padding-top: 1.25rem;
  margin-top: 0;
}
.section-content h4 {
  color: var(--text);
  font-size: 0.95rem;
  margin: 1.25rem 0 0.6rem;
  font-weight: 650;
}
.section-content p { margin-bottom: 0.85rem; }
.section-content strong { color: var(--text); font-weight: 650; }
.section-content em { color: #c4b5fd; font-style: normal; }
.section-content ol, .section-content ul { margin: 0.5rem 0 1rem 1.25rem; }
.section-content li { margin-bottom: 0.4rem; }

/* Content components */
.fact-list {
  list-style: none;
  margin-left: 0 !important;
}
.fact-list li {
  position: relative;
  padding-left: 1.4rem;
  margin-bottom: 0.55rem;
}
.fact-list li::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--mod-color, var(--accent));
  font-weight: 700;
}

.callout {
  border-radius: var(--radius-sm);
  padding: 1rem 1.15rem;
  margin: 1rem 0;
  font-size: 0.9rem;
  border-left: 3px solid;
}
.callout-key {
  background: rgba(124, 92, 255, 0.1);
  border-color: var(--accent);
  color: #d4cbff;
}
.callout-tip {
  background: rgba(0, 212, 170, 0.08);
  border-color: var(--accent-2);
  color: #a7f3e0;
}
.callout-warn {
  background: rgba(255, 176, 32, 0.1);
  border-color: var(--warning);
  color: #ffe0a0;
}

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.85rem;
  margin: 1rem 0;
}
.mini-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 1rem;
}
.mini-card h4 { color: var(--text); margin: 0 0 0.4rem !important; font-size: 0.9rem; }
.mini-card.warn { border-color: rgba(255, 176, 32, 0.3); }

.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin: 1.25rem 0;
}
.pillar-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 1.25rem;
  text-align: center;
  transition: transform 0.3s var(--ease), border-color 0.3s;
}
.pillar-card:hover {
  transform: translateY(-4px);
  border-color: rgba(124, 92, 255, 0.4);
}
.pillar-letter {
  width: 48px; height: 48px;
  margin: 0 auto 0.75rem;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--accent), var(--accent-5));
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 1.2rem;
  color: white;
}
.pillar-card h4 {
  color: var(--text);
  font-size: 0.95rem;
  margin: 0 0 0.5rem !important;
  line-height: 1.3;
}
.pillar-card h4 span {
  font-weight: 500;
  color: var(--text-dim);
  font-size: 0.8rem;
}
.pillar-card p { font-size: 0.8rem; margin: 0 !important; }

.values-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 0.75rem;
  margin: 1rem 0;
}
.value-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 1rem 0.75rem;
  text-align: center;
  transition: all 0.3s var(--ease);
}
.value-card:hover {
  transform: translateY(-3px) scale(1.03);
  border-color: rgba(124, 92, 255, 0.35);
  box-shadow: 0 8px 24px rgba(124, 92, 255, 0.15);
}
.value-icon { font-size: 1.5rem; display: block; margin-bottom: 0.4rem; }
.value-card h4 { color: var(--text); font-size: 0.85rem; margin: 0 !important; }
.value-card .vi { color: var(--accent); font-size: 0.75rem; font-weight: 600; margin: 0.15rem 0 0.4rem !important; }
.value-card p:last-child { font-size: 0.72rem; margin: 0 !important; color: var(--text-muted); }

.timebox-table {
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin: 1rem 0;
}
.tb-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--glass-border);
  font-size: 0.9rem;
}
.tb-row:last-child { border-bottom: none; }
.tb-head {
  background: rgba(124, 92, 255, 0.12);
  font-weight: 650;
  color: var(--text);
}
.tb-time {
  color: var(--accent-2);
  font-weight: 650;
  font-family: var(--mono);
  font-size: 0.85rem;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0.75rem 0 1rem;
}
.tag {
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  background: rgba(124, 92, 255, 0.12);
  border: 1px solid rgba(124, 92, 255, 0.25);
  color: #c4b5fd;
  font-size: 0.8rem;
  font-weight: 550;
}
.tags.large .tag { padding: 0.5rem 1rem; font-size: 0.85rem; }

.serve-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.85rem;
  margin: 1rem 0;
}
.serve-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 1rem;
}
.serve-card h4 { color: var(--accent-2); margin: 0 0 0.6rem !important; font-size: 0.9rem; }
.serve-card ul { margin: 0 !important; padding-left: 1rem; font-size: 0.82rem; }
.serve-card li { margin-bottom: 0.35rem; }

.scale-box {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  margin: 1rem 0;
}
.scale-item {
  background: rgba(0, 212, 170, 0.08);
  border: 1px solid rgba(0, 212, 170, 0.2);
  border-radius: var(--radius-sm);
  padding: 1rem;
  text-align: center;
}
.scale-item strong {
  display: block;
  font-size: 1.5rem;
  color: var(--accent-2);
  font-weight: 800;
}
.scale-item span { font-size: 0.75rem; color: var(--text-dim); }

.topics { display: flex; flex-direction: column; gap: 0.85rem; margin: 1rem 0; }
.topic-card {
  display: flex;
  gap: 1rem;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 1.1rem;
  transition: border-color 0.3s;
}
.topic-card:hover { border-color: rgba(255, 107, 157, 0.35); }
.topic-num {
  width: 36px; height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent-3), #c44a7a);
  display: grid;
  place-items: center;
  font-weight: 800;
  flex-shrink: 0;
  color: white;
}
.topic-card h4 { color: var(--text); margin: 0 0 0.35rem !important; font-size: 0.9rem; }
.topic-card p { margin: 0 !important; font-size: 0.85rem; }

.artifact-map {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  margin: 1.25rem 0;
}
.art-row {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 0.75rem;
}
.art-name, .art-commit {
  padding: 0.85rem 1rem;
  border-radius: var(--radius-sm);
  text-align: center;
  font-weight: 650;
  font-size: 0.9rem;
}
.art-name {
  background: rgba(255, 176, 32, 0.12);
  border: 1px solid rgba(255, 176, 32, 0.3);
  color: #ffd280;
}
.art-commit {
  background: rgba(79, 172, 254, 0.12);
  border: 1px solid rgba(79, 172, 254, 0.3);
  color: #a0d4ff;
}
.art-arrow {
  color: var(--text-muted);
  font-size: 1.2rem;
  font-weight: 700;
}

.anti-list { display: flex; flex-direction: column; gap: 0.5rem; margin: 1rem 0; }
.anti-item {
  padding: 0.7rem 1rem;
  background: rgba(255, 92, 122, 0.08);
  border: 1px solid rgba(255, 92, 122, 0.2);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  color: #ffb0c0;
}

.exam-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.85rem;
  margin: 1.25rem 0;
}
.stat {
  text-align: center;
  padding: 1.25rem 0.5rem;
  background: rgba(248, 87, 166, 0.08);
  border: 1px solid rgba(248, 87, 166, 0.2);
  border-radius: var(--radius);
}
.stat-num {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--accent-3);
}
.stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
}

.word-traps {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.85rem;
  margin: 1rem 0;
}
.trap {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 1rem;
}
.trap h4 { color: var(--accent-3); margin: 0 0 0.5rem !important; font-size: 0.9rem; }
.trap p { margin: 0 0 0.35rem !important; font-size: 0.85rem; }
.trap .small { font-size: 0.75rem; color: var(--text-muted); }

.roadmap {
  margin: 1rem 0 1rem 1.25rem;
}
.roadmap li {
  margin-bottom: 0.65rem;
  padding-left: 0.35rem;
}
.example {
  font-size: 0.85rem;
  padding: 0.75rem 1rem;
  background: rgba(255,255,255,0.03);
  border-radius: var(--radius-sm);
  border-left: 2px solid var(--accent);
  margin: 0.5rem 0 1rem !important;
  color: var(--text-dim);
}
.mnemonic {
  font-size: 0.9rem;
  color: #c4b5fd;
  margin: 0.75rem 0 !important;
}
.highlight-line {
  font-size: 1.05rem;
  color: var(--text) !important;
  padding: 0.75rem 0;
}

/* ===== Flashcards ===== */
.fc-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.5rem;
}
.fc-header h1 { font-size: 1.75rem; font-weight: 800; }
.fc-counter {
  font-size: 0.9rem;
  color: var(--text-dim);
  font-family: var(--mono);
}

.fc-stage {
  perspective: 1200px;
  max-width: 640px;
  margin: 0 auto 1.5rem;
  min-height: 320px;
}
.fc-card {
  width: 100%;
  min-height: 320px;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.65s var(--ease);
  cursor: pointer;
}
.fc-card.flipped { transform: rotateY(180deg); }
.fc-face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid var(--glass-border);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  text-align: center;
  box-shadow: var(--shadow);
}
.fc-front {
  background: linear-gradient(160deg, #1a1a32 0%, #12122a 100%);
}
.fc-back {
  background: linear-gradient(160deg, #142820 0%, #0e1a18 100%);
  transform: rotateY(180deg);
  border-color: rgba(0, 212, 170, 0.25);
}
.fc-label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}
.fc-front .fc-label { color: #a78bfa; }
.fc-back .fc-label { color: var(--accent-2); }
.fc-text {
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.5;
  color: var(--text);
}
.fc-hint {
  position: absolute;
  bottom: 1.25rem;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.fc-controls {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}
.fc-progress-bar {
  max-width: 640px;
  margin: 1.5rem auto 0;
  height: 4px;
  background: var(--bg-3);
  border-radius: 4px;
  overflow: hidden;
}
.fc-progress-bar .fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  border-radius: 4px;
  transition: width 0.4s var(--ease);
  width: 0%;
}

/* ===== Quiz ===== */
.quiz-setup, .quiz-play, .quiz-result {
  max-width: 720px;
  margin: 0 auto;
}
.quiz-setup {
  text-align: center;
  padding: 2rem 0;
}
.quiz-setup h1 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
}
.quiz-setup .sub {
  color: var(--text-dim);
  margin-bottom: 2rem;
}
.quiz-modes {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-bottom: 2rem;
}
.mode-card {
  background: var(--glass);
  border: 2px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 1.35rem 1rem;
  cursor: pointer;
  transition: all 0.3s var(--ease);
}
.mode-card:hover, .mode-card.selected {
  border-color: var(--accent);
  background: rgba(124, 92, 255, 0.1);
  transform: translateY(-3px);
}
.mode-card .mode-num {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--accent);
}
.mode-card .mode-lbl {
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-top: 0.25rem;
}

.quiz-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
  gap: 0.75rem;
}
.quiz-progress-text {
  font-size: 0.9rem;
  color: var(--text-dim);
  font-family: var(--mono);
}
.quiz-score-live {
  font-size: 0.9rem;
  font-weight: 650;
  color: var(--accent-2);
}
.quiz-bar {
  height: 6px;
  background: var(--bg-3);
  border-radius: 6px;
  overflow: hidden;
  margin-bottom: 1.75rem;
}
.quiz-bar .fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: width 0.4s var(--ease);
  border-radius: 6px;
}

.q-card {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  margin-bottom: 1.25rem;
  animation: fadeUp 0.4s var(--ease) both;
}
.q-domain {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(124, 92, 255, 0.12);
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  margin-bottom: 1rem;
}
.q-text {
  font-size: 1.15rem;
  font-weight: 650;
  line-height: 1.5;
  margin-bottom: 1.5rem;
  color: var(--text);
}
.q-hint {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}
.options {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}
.option {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  padding: 1rem 1.15rem;
  background: rgba(255,255,255,0.02);
  border: 1.5px solid var(--glass-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.25s var(--ease);
  text-align: left;
  font-family: var(--font);
  font-size: 0.95rem;
  color: var(--text-dim);
  width: 100%;
}
.option:hover:not(:disabled) {
  border-color: rgba(124, 92, 255, 0.4);
  background: rgba(124, 92, 255, 0.06);
  color: var(--text);
}
.option.selected {
  border-color: var(--accent);
  background: rgba(124, 92, 255, 0.12);
  color: var(--text);
}
.option.correct {
  border-color: var(--success);
  background: rgba(0, 212, 170, 0.12);
  color: #a7f3e0;
}
.option.wrong {
  border-color: var(--danger);
  background: rgba(255, 92, 122, 0.12);
  color: #ffb0c0;
}
.option:disabled { cursor: default; }
.opt-letter {
  width: 28px; height: 28px;
  border-radius: 8px;
  background: var(--bg-3);
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 0.8rem;
  flex-shrink: 0;
  color: var(--text-muted);
}
.option.selected .opt-letter,
.option.correct .opt-letter {
  background: var(--accent);
  color: white;
}
.option.correct .opt-letter { background: var(--success); color: #041510; }
.option.wrong .opt-letter { background: var(--danger); color: white; }
.opt-text { flex: 1; padding-top: 0.15rem; }

.q-explain {
  margin-top: 1.25rem;
  padding: 1rem 1.15rem;
  border-radius: var(--radius-sm);
  background: rgba(0, 212, 170, 0.08);
  border: 1px solid rgba(0, 212, 170, 0.2);
  font-size: 0.9rem;
  color: #a7f3e0;
  display: none;
  animation: fadeUp 0.35s var(--ease) both;
}
.q-explain.show { display: block; }
.q-explain strong { color: var(--accent-2); }

.quiz-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
}

/* Quiz result */
.quiz-result {
  text-align: center;
  padding: 2rem 0;
}
.result-ring-wrap {
  width: 160px; height: 160px;
  margin: 0 auto 1.5rem;
  position: relative;
}
.result-ring-wrap svg {
  width: 160px; height: 160px;
  transform: rotate(-90deg);
}
.result-ring-wrap circle {
  fill: none;
  stroke-width: 8;
}
.result-ring-wrap .bg { stroke: var(--bg-3); }
.result-ring-wrap .fg {
  stroke: var(--result-color, var(--accent-2));
  stroke-linecap: round;
  stroke-dasharray: 440;
  stroke-dashoffset: 440;
  transition: stroke-dashoffset 1.2s var(--ease);
}
.result-pct {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-size: 2.2rem;
  font-weight: 800;
}
.result-title {
  font-size: 1.75rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
}
.result-sub {
  color: var(--text-dim);
  margin-bottom: 2rem;
}
.result-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-bottom: 2rem;
}
.result-stat {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 1.15rem;
}
.result-stat .n {
  font-size: 1.5rem;
  font-weight: 800;
}
.result-stat .l {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Confetti canvas */
#confetti {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 999;
}

/* ===== Glossary ===== */
.gl-header {
  margin-bottom: 1.5rem;
}
.gl-header h1 {
  font-size: 1.75rem;
  font-weight: 800;
  margin-bottom: 1rem;
}
.search-box {
  position: relative;
  max-width: 480px;
}
.search-box input {
  width: 100%;
  padding: 0.85rem 1rem 0.85rem 2.75rem;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  color: var(--text);
  font-family: var(--font);
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.25s, box-shadow 0.25s;
}
.search-box input:focus {
  border-color: rgba(124, 92, 255, 0.5);
  box-shadow: 0 0 0 3px rgba(124, 92, 255, 0.15);
}
.search-box input::placeholder { color: var(--text-muted); }
.search-box .search-icon {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 1rem;
}

.glossary-list {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}
.gl-item {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 1.1rem 1.25rem;
  transition: all 0.25s var(--ease);
  animation: fadeUp 0.4s var(--ease) both;
}
.gl-item:hover {
  border-color: rgba(124, 92, 255, 0.3);
  transform: translateX(4px);
}
.gl-term {
  font-weight: 700;
  color: var(--text);
  font-size: 1rem;
  margin-bottom: 0.35rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.gl-term .letter {
  width: 24px; height: 24px;
  border-radius: 6px;
  background: rgba(124, 92, 255, 0.15);
  color: #c4b5fd;
  font-size: 0.7rem;
  font-weight: 800;
  display: grid;
  place-items: center;
}
.gl-def {
  font-size: 0.9rem;
  color: var(--text-dim);
  line-height: 1.55;
}
.gl-empty {
  text-align: center;
  padding: 3rem;
  color: var(--text-muted);
}

/* ===== Footer ===== */
.footer {
  text-align: center;
  padding: 2rem 1.5rem;
  border-top: 1px solid var(--glass-border);
  color: var(--text-muted);
  font-size: 0.8rem;
}
.footer a {
  color: var(--accent);
  text-decoration: none;
}
.footer strong { color: var(--text-dim); }

/* ===== Toast ===== */
.toast {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--bg-2);
  border: 1px solid var(--glass-border);
  color: var(--text);
  padding: 0.85rem 1.35rem;
  border-radius: 12px;
  font-size: 0.9rem;
  font-weight: 550;
  box-shadow: var(--shadow);
  z-index: 500;
  opacity: 0;
  transition: all 0.4s var(--ease);
  pointer-events: none;
}
.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .nav-links { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--nav-h);
    left: 0; right: 0;
    background: rgba(7, 7, 13, 0.95);
    backdrop-filter: blur(20px);
    padding: 1rem;
    border-bottom: 1px solid var(--glass-border);
    gap: 0.25rem;
  }
  .nav-links.open button {
    width: 100%;
    text-align: left;
    padding: 0.85rem 1rem;
  }
  .menu-toggle { display: grid; place-items: center; }
  .exam-strip { grid-template-columns: repeat(2, 1fr); }
  .pillars { grid-template-columns: 1fr; }
  .serve-grid { grid-template-columns: 1fr; }
  .scale-box { grid-template-columns: repeat(2, 1fr); }
  .grid-2 { grid-template-columns: 1fr; }
  .word-traps { grid-template-columns: 1fr; }
  .quiz-modes { grid-template-columns: 1fr; }
  .quick-actions { grid-template-columns: 1fr; }
  .exam-stats { grid-template-columns: repeat(2, 1fr); }
  .result-stats { grid-template-columns: 1fr; }
  .mod-header .sub { margin-left: 0; }
  .art-row { grid-template-columns: 1fr; text-align: center; }
  .art-arrow { transform: rotate(90deg); }
}

@media (max-width: 480px) {
  .main { padding: 1.25rem 1rem 3rem; }
  .hero { padding: 1.5rem 0; }
  .fc-stage { min-height: 280px; }
  .fc-card { min-height: 280px; }
}

/* Mark module complete button */
.mark-done {
  margin-top: 1.5rem;
  display: flex;
  justify-content: center;
}

/* Keyboard hint */
.kbd {
  display: inline-block;
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
  background: var(--bg-3);
  border: 1px solid var(--glass-border);
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--text-muted);
}

/* Scrollbar */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-0); }
::-webkit-scrollbar-thumb {
  background: var(--bg-3);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover { background: #2a2a48; }

/* Selection */
::selection {
  background: rgba(124, 92, 255, 0.35);
  color: white;
}

/* ===== Light theme ===== */
html[data-theme="light"] {
  --bg-0: #f4f5fb;
  --bg-1: #ffffff;
  --bg-2: #eef0f8;
  --bg-3: #e2e5f0;
  --glass: rgba(255, 255, 255, 0.72);
  --glass-border: rgba(30, 30, 60, 0.1);
  --text: #14142b;
  --text-dim: #4a4a6a;
  --text-muted: #7a7a96;
  --shadow: 0 8px 32px rgba(40, 40, 80, 0.1);
}
html[data-theme="light"] body { background: var(--bg-0); }
html[data-theme="light"] .topnav {
  background: rgba(244, 245, 251, 0.85);
}
html[data-theme="light"] .bg-orbs .orb { opacity: 0.18; }
html[data-theme="light"] .fc-front {
  background: linear-gradient(160deg, #ffffff 0%, #f0f0ff 100%);
}
html[data-theme="light"] .fc-back {
  background: linear-gradient(160deg, #e8fff8 0%, #f0fffa 100%);
}
html[data-theme="light"] .option { color: var(--text-dim); }
html[data-theme="light"] .callout-key { color: #3d2f8a; }
html[data-theme="light"] .callout-tip { color: #0a6b54; }
html[data-theme="light"] .callout-warn { color: #8a5a00; }

/* ===== Shared helpers ===== */
.muted-line { color: var(--text-dim); font-size: 0.9rem; }
.muted-line.center { text-align: center; }
.hi { color: var(--accent-2) !important; }
.home-tips {
  margin-top: 2.5rem;
  padding: 1.5rem;
  border-radius: var(--radius);
  background: var(--glass);
  border: 1px solid var(--glass-border);
}
.home-tips h3 { font-size: 1rem; margin-bottom: 0.75rem; }
.home-tips ul {
  color: var(--text-dim);
  font-size: 0.9rem;
  margin-left: 1.1rem;
  line-height: 1.8;
}
.home-tips strong { color: var(--text); }

.quick-actions {
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
}

/* ===== SRS buttons ===== */
.fc-modes { display: flex; gap: 0.4rem; flex-wrap: wrap; }
.srs-btns {
  display: none;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.65rem;
  max-width: 640px;
  margin: 0 auto;
}
.srs-btns.show { display: grid; animation: fadeUp 0.3s var(--ease) both; }
.srs-btn {
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 0.85rem 0.5rem;
  background: var(--glass);
  color: var(--text);
  font-family: var(--font);
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.2s var(--ease);
  line-height: 1.3;
}
.srs-btn small {
  display: block;
  font-weight: 500;
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
}
.srs-btn:hover { transform: translateY(-2px); }
.srs-btn.again { border-color: rgba(255,92,122,.4); color: #ff8aa0; }
.srs-btn.hard { border-color: rgba(255,176,32,.4); color: #ffc04d; }
.srs-btn.good { border-color: rgba(0,212,170,.4); color: var(--accent-2); }
.srs-btn.easy { border-color: rgba(79,172,254,.4); color: #6bc0ff; }

/* ===== Quiz setup extras ===== */
.setup-block {
  text-align: left;
  margin: 1.5rem 0;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}
.setup-block h3 {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.75rem;
}
.domain-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.chip {
  border: 1.5px solid var(--glass-border);
  background: var(--glass);
  color: var(--text-dim);
  border-radius: 999px;
  padding: 0.4rem 0.9rem;
  font-family: var(--font);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}
.chip:hover { border-color: rgba(124,92,255,.4); color: var(--text); }
.chip.active {
  background: rgba(124, 92, 255, 0.15);
  border-color: var(--accent);
  color: var(--text);
}
.quiz-modes {
  grid-template-columns: repeat(2, 1fr);
}
.mode-exam .mode-num { color: var(--accent-3); }
.setup-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}
.setup-stats strong { color: var(--accent-2); }

.quiz-top-right {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}
.exam-clock {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 1rem;
  padding: 0.35rem 0.75rem;
  border-radius: 8px;
  background: rgba(124, 92, 255, 0.12);
  color: var(--accent);
  border: 1px solid rgba(124, 92, 255, 0.25);
}
.exam-clock.urgent {
  background: rgba(255, 92, 122, 0.15);
  color: var(--danger);
  border-color: rgba(255, 92, 122, 0.35);
  animation: pulse 1s ease infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

/* Review list */
.review-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  text-align: left;
}
.review-item {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 1.1rem 1.2rem;
}
.review-q {
  font-weight: 650;
  color: var(--text);
  margin-bottom: 0.5rem;
  line-height: 1.45;
}
.review-a {
  font-size: 0.9rem;
  color: var(--accent-2);
  margin-bottom: 0.4rem;
}
.review-explain {
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-bottom: 0.75rem;
}

/* ===== Cheat sheet ===== */
.cs-header {
  margin-bottom: 1.5rem;
}
.cs-header h1 {
  font-size: 1.75rem;
  font-weight: 800;
  margin-bottom: 0.35rem;
}
.cs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1rem;
}
.cs-card {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 1.25rem;
}
.cs-card h3 {
  font-size: 0.95rem;
  margin-bottom: 0.85rem;
  color: var(--text);
}
.cs-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}
.cs-table th, .cs-table td {
  text-align: left;
  padding: 0.45rem 0.35rem;
  border-bottom: 1px solid var(--glass-border);
  color: var(--text-dim);
}
.cs-table th { color: var(--text-muted); font-weight: 600; font-size: 0.75rem; text-transform: uppercase; }
.cs-table .hi { color: var(--accent-2); font-weight: 700; font-family: var(--mono); }
.cs-row {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding: 0.55rem 0;
  border-bottom: 1px solid var(--glass-border);
  font-size: 0.88rem;
}
.cs-row:last-child { border-bottom: none; }
.cs-row strong { color: var(--text); font-size: 0.9rem; }
.cs-row span { color: var(--text-dim); }
.cs-art-map { display: flex; flex-direction: column; gap: 0.55rem; }
.cs-art {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto;
  gap: 0.4rem;
  align-items: center;
  font-size: 0.8rem;
}
.cs-art .a, .cs-art .c {
  padding: 0.45rem 0.5rem;
  border-radius: 8px;
  text-align: center;
  font-weight: 650;
}
.cs-art .a {
  background: rgba(255, 176, 32, 0.12);
  color: #e0a030;
  border: 1px solid rgba(255, 176, 32, 0.25);
}
.cs-art .c {
  background: rgba(79, 172, 254, 0.12);
  color: #4facfe;
  border: 1px solid rgba(79, 172, 254, 0.25);
}
.cs-art .arrow { color: var(--text-muted); }
.cs-art .o { color: var(--text-muted); font-size: 0.72rem; }
.cs-traps {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--text-dim);
  font-size: 0.88rem;
  line-height: 1.7;
}
.diagram-card { margin-top: 1rem; }
.flow-diagram {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
}
.flow-step {
  background: rgba(124, 92, 255, 0.1);
  border: 1px solid rgba(124, 92, 255, 0.25);
  border-radius: 12px;
  padding: 0.75rem 0.9rem;
  text-align: center;
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--text);
}
.flow-step small {
  display: block;
  font-weight: 500;
  color: var(--text-muted);
  font-size: 0.7rem;
  margin-top: 0.2rem;
}
.flow-arr {
  color: var(--accent);
  font-weight: 800;
  font-size: 1.1rem;
}

/* ===== Settings ===== */
.settings-wrap { max-width: 640px; }
.settings-wrap h1 {
  font-size: 1.75rem;
  font-weight: 800;
  margin-bottom: 1.25rem;
}
.settings-card {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 1.25rem 1.35rem;
  margin-bottom: 1rem;
}
.settings-card h3 {
  font-size: 0.95rem;
  margin-bottom: 1rem;
}
.setting-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.65rem 0;
  border-bottom: 1px solid var(--glass-border);
  font-size: 0.9rem;
}
.setting-row:last-child { border-bottom: none; }
.seg {
  display: flex;
  gap: 0.35rem;
  background: var(--bg-3);
  padding: 0.25rem;
  border-radius: 10px;
}
.seg-btn {
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-family: var(--font);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.4rem 0.75rem;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s;
}
.seg-btn.on {
  background: var(--bg-1);
  color: var(--text);
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}
.danger-btn { color: var(--danger) !important; border-color: rgba(255,92,122,.3) !important; }

/* Print cheatsheet */
@media print {
  .bg-orbs, .bg-grid, .topnav, .footer, .hero-cta, .btn { display: none !important; }
  body { background: white; color: black; }
  .cs-card { break-inside: avoid; border: 1px solid #ccc; }
  .view { display: block !important; }
  #view-cheatsheet { display: block !important; }
  #view-home, #view-module, #view-flashcards, #view-quiz, #view-glossary, #view-settings { display: none !important; }
}

@media (max-width: 900px) {
  .srs-btns { grid-template-columns: repeat(2, 1fr); }
  .quiz-modes { grid-template-columns: 1fr; }
  .cs-art { grid-template-columns: 1fr; text-align: center; }
  .flow-diagram { flex-direction: column; }
  .flow-arr { transform: rotate(90deg); }
}

/* ===== Sprint Demo ===== */
.sprint-demo { max-width: 960px; margin: 0 auto; }
.sd-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
  align-items: flex-start;
}
.sd-header h1 {
  font-size: 1.7rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}
.sd-tabs {
  display: flex;
  gap: 0.35rem;
  background: var(--bg-3);
  padding: 0.3rem;
  border-radius: 12px;
}
.sd-tab {
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-family: var(--font);
  font-size: 0.85rem;
  font-weight: 650;
  padding: 0.5rem 0.9rem;
  border-radius: 9px;
  cursor: pointer;
  transition: all 0.2s;
}
.sd-tab.on {
  background: var(--bg-1);
  color: var(--text);
  box-shadow: 0 2px 10px rgba(0,0,0,0.15);
}

.sd-story {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}
.sd-story-item {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 0.9rem 1rem;
}
.sd-story-item span {
  display: block;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}
.sd-story-item strong {
  font-size: 0.92rem;
  color: var(--text);
  font-weight: 650;
  line-height: 1.4;
}

.sd-rail-wrap { margin-bottom: 1.5rem; }
.sd-rail {
  display: flex;
  align-items: flex-start;
  gap: 0;
  overflow-x: auto;
  padding: 0.5rem 0 1rem;
  scrollbar-width: thin;
}
.sd-node {
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  width: 88px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-dim);
  font-family: var(--font);
  position: relative;
  transition: transform 0.25s var(--ease);
}
.sd-node:hover { transform: translateY(-3px); }
.sd-node-icon {
  width: 52px;
  height: 52px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  font-size: 1.35rem;
  background: var(--glass);
  border: 2px solid var(--glass-border);
  transition: all 0.35s var(--ease);
}
.sd-node.active .sd-node-icon {
  border-color: var(--node);
  background: color-mix(in srgb, var(--node) 20%, transparent);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--node) 18%, transparent),
    0 8px 24px color-mix(in srgb, var(--node) 30%, transparent);
  animation: nodePulse 2s ease-in-out infinite;
}
.sd-node.done .sd-node-icon {
  border-color: color-mix(in srgb, var(--node) 50%, transparent);
  opacity: 0.85;
}
@keyframes nodePulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.06); }
}
.sd-node-label {
  font-size: 0.72rem;
  font-weight: 650;
  text-align: center;
  line-height: 1.2;
}
.sd-node.active .sd-node-label { color: var(--text); }
.sd-badge {
  font-size: 0.58rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.12rem 0.35rem;
  border-radius: 999px;
  background: rgba(124, 92, 255, 0.15);
  color: #b8a6ff;
}
.sd-badge.dim {
  background: rgba(255,255,255,0.06);
  color: var(--text-muted);
}
.sd-line {
  flex: 1 1 20px;
  min-width: 16px;
  height: 2px;
  margin-top: 26px;
  background: linear-gradient(90deg, var(--glass-border), rgba(124,92,255,0.35), var(--glass-border));
  border-radius: 2px;
  align-self: flex-start;
}
.sd-controls {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 0.25rem;
}

.sd-stage {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  position: relative;
  overflow: hidden;
  margin-bottom: 1.5rem;
}
.sd-stage::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--stage), transparent);
}
.sd-stage-head {
  display: flex;
  gap: 1rem;
  align-items: center;
  margin-bottom: 1.25rem;
}
.sd-stage-icon {
  width: 64px;
  height: 64px;
  border-radius: 18px;
  display: grid;
  place-items: center;
  font-size: 1.8rem;
  background: color-mix(in srgb, var(--stage) 18%, transparent);
  border: 1px solid color-mix(in srgb, var(--stage) 35%, transparent);
  flex-shrink: 0;
}
.sd-kicker {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--stage);
  margin-bottom: 0.2rem;
}
.sd-stage-head h2 {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}
.sd-timebox {
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-top: 0.2rem;
  font-family: var(--mono);
}

.sd-annotations {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.65rem;
  margin-bottom: 1.25rem;
}
.sd-anno {
  display: flex;
  gap: 0.55rem;
  align-items: flex-start;
  padding: 0.7rem 0.85rem;
  border-radius: var(--radius-sm);
  background: color-mix(in srgb, var(--stage) 8%, transparent);
  border: 1px solid color-mix(in srgb, var(--stage) 22%, transparent);
  font-size: 0.85rem;
  color: var(--text-dim);
  line-height: 1.4;
}
.sd-anno-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--stage);
  margin-top: 0.35rem;
  flex-shrink: 0;
  box-shadow: 0 0 10px var(--stage);
}
.sd-anno-bottom { grid-column: 1 / -1; }

.sd-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}
.sd-col h3 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin: 0.75rem 0 0.35rem;
}
.sd-col h3:first-child { margin-top: 0; }
.sd-col p {
  font-size: 0.92rem;
  color: var(--text-dim);
  line-height: 1.55;
}
.sd-learn {
  margin-top: 1rem;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-sm);
  background: rgba(0, 212, 170, 0.08);
  border: 1px solid rgba(0, 212, 170, 0.22);
  color: #8eebc8;
  font-size: 0.88rem;
  font-weight: 550;
}
html[data-theme="light"] .sd-learn { color: #0a6b54; }

.sd-scene {
  background: rgba(0,0,0,0.15);
  border-radius: var(--radius);
  padding: 1rem;
  border: 1px solid var(--glass-border);
}
html[data-theme="light"] .sd-scene { background: rgba(0,0,0,0.03); }

.scene-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 0.5rem; }
.scene-pbi {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 0.8rem;
  border-radius: 10px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  font-size: 0.85rem;
}
.pbi-name { color: var(--text); font-weight: 550; }
.pbi-tag {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--accent);
  background: rgba(124,92,255,0.12);
  padding: 0.2rem 0.5rem;
  border-radius: 999px;
  white-space: nowrap;
}

.scene-topics { display: flex; flex-direction: column; gap: 0.65rem; }
.scene-topic {
  padding: 0.75rem 0.85rem;
  border-radius: 10px;
  border-left: 3px solid var(--stage);
  background: var(--glass);
}
.topic-q {
  font-weight: 800;
  color: var(--stage);
  font-size: 0.85rem;
  margin-bottom: 0.25rem;
}
.topic-a { font-size: 0.85rem; color: var(--text-dim); }

.scene-board {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}
.board-col {
  background: var(--glass);
  border-radius: 10px;
  padding: 0.5rem;
  border: 1px solid var(--glass-border);
  min-height: 100px;
}
.board-h {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.45rem;
  text-align: center;
}
.board-card {
  font-size: 0.75rem;
  padding: 0.45rem 0.5rem;
  border-radius: 8px;
  background: color-mix(in srgb, var(--stage) 15%, transparent);
  border: 1px solid color-mix(in srgb, var(--stage) 25%, transparent);
  color: var(--text);
  margin-bottom: 0.35rem;
  font-weight: 550;
}
.scene-talk {
  font-size: 0.85rem;
  color: var(--text-dim);
  font-style: italic;
  line-height: 1.45;
}

.scene-rules { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 0.45rem; }
.scene-rules li {
  font-size: 0.85rem;
  padding: 0.6rem 0.75rem;
  border-radius: 10px;
  line-height: 1.4;
}
.scene-rules li.ok {
  background: rgba(0, 212, 170, 0.08);
  border: 1px solid rgba(0, 212, 170, 0.2);
  color: var(--text-dim);
}
.scene-rules li.bad {
  background: rgba(255, 92, 122, 0.08);
  border: 1px solid rgba(255, 92, 122, 0.2);
  color: var(--text-dim);
}

.scene-review { display: flex; flex-direction: column; gap: 0.55rem; }
.rev-block {
  padding: 0.7rem 0.85rem;
  border-radius: 10px;
  font-size: 0.85rem;
}
.rev-block strong { display: block; margin-bottom: 0.25rem; font-size: 0.8rem; }
.rev-block p { margin: 0; color: var(--text-dim); line-height: 1.4; }
.rev-block.ok { background: rgba(0,212,170,0.1); border: 1px solid rgba(0,212,170,0.25); }
.rev-block.ok strong { color: var(--accent-2); }
.rev-block.bad { background: rgba(255,92,122,0.1); border: 1px solid rgba(255,92,122,0.25); }
.rev-block.bad strong { color: var(--danger); }
.rev-block.info { background: rgba(79,172,254,0.1); border: 1px solid rgba(79,172,254,0.25); }
.rev-block.info strong { color: var(--accent-5); }

.scene-retro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.65rem;
  font-size: 0.85rem;
}
.scene-retro h4 {
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}
.scene-retro ul { margin: 0; padding-left: 1rem; color: var(--text-dim); line-height: 1.55; }
.retro-actions { grid-column: 1 / -1; padding-top: 0.35rem; }
.retro-actions li { color: var(--accent-2); font-weight: 550; }

.sd-events-legend {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 1.25rem;
}
.sd-events-legend h3 {
  font-size: 1rem;
  margin-bottom: 0.85rem;
}
.sd-legend-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}
.sd-leg {
  padding: 0.85rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--glass-border);
  font-size: 0.82rem;
}
.sd-leg strong { display: block; margin-bottom: 0.35rem; color: var(--text); font-size: 0.88rem; }
.sd-leg span { color: var(--text-dim); line-height: 1.4; }
.sd-leg.formal { border-color: rgba(255,107,157,0.35); background: rgba(255,107,157,0.06); }
.sd-leg.container { border-color: rgba(124,92,255,0.35); background: rgba(124,92,255,0.06); }
.sd-leg.activity { border-color: rgba(255,176,32,0.35); background: rgba(255,176,32,0.06); }

/* Use cases */
.case-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 1.25rem;
}
.case-pill {
  width: 48px;
  height: 40px;
  border-radius: 10px;
  border: 1px solid var(--glass-border);
  background: var(--glass);
  color: var(--text-dim);
  font-family: var(--font);
  font-size: 0.8rem;
  font-weight: 650;
  cursor: pointer;
  transition: all 0.2s;
}
.case-pill:hover { border-color: rgba(124,92,255,0.4); }
.case-pill.on {
  border-color: var(--accent);
  background: rgba(124,92,255,0.15);
  color: var(--text);
}
.case-pill.cleared { box-shadow: inset 0 -2px 0 var(--accent-2); }

.case-card {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
}
.case-meta { margin-bottom: 1rem; }
.case-diff {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent-3);
  background: rgba(255,107,157,0.12);
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  margin-bottom: 0.5rem;
}
.case-card h2 {
  font-size: 1.25rem;
  font-weight: 800;
}
.case-context {
  background: rgba(0,0,0,0.12);
  border-radius: var(--radius-sm);
  padding: 1rem;
  margin-bottom: 1.15rem;
  border: 1px solid var(--glass-border);
}
html[data-theme="light"] .case-context { background: rgba(0,0,0,0.03); }
.case-context h3 {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}
.case-context p {
  font-size: 0.92rem;
  color: var(--text-dim);
  line-height: 1.55;
  margin: 0;
}
.case-q {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--text);
}
.case-choices {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}
.case-choice {
  display: flex;
  gap: 0.85rem;
  align-items: flex-start;
  text-align: left;
  width: 100%;
  padding: 0.95rem 1.05rem;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--glass-border);
  background: rgba(255,255,255,0.02);
  color: var(--text-dim);
  font-family: var(--font);
  font-size: 0.92rem;
  cursor: pointer;
  transition: all 0.25s var(--ease);
  line-height: 1.45;
}
.case-choice:hover:not(:disabled) {
  border-color: rgba(124,92,255,0.45);
  color: var(--text);
  transform: translateX(3px);
}
.case-choice:disabled { cursor: default; }
.case-letter {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--bg-3);
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 0.8rem;
  flex-shrink: 0;
  color: var(--text-muted);
}
.case-choice.correct {
  border-color: var(--success);
  background: rgba(0,212,170,0.12);
  color: #a7f3e0;
}
.case-choice.correct .case-letter { background: var(--success); color: #041510; }
.case-choice.wrong {
  border-color: var(--danger);
  background: rgba(255,92,122,0.12);
  color: #ffb0c0;
}
.case-choice.wrong .case-letter { background: var(--danger); color: white; }
.case-choice.dimmed { opacity: 0.45; }

.case-feedback {
  margin-top: 1.15rem;
  padding: 1rem 1.15rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  line-height: 1.5;
}
.case-feedback.ok {
  background: rgba(0,212,170,0.1);
  border: 1px solid rgba(0,212,170,0.25);
  color: #a7f3e0;
}
.case-feedback.bad {
  background: rgba(255,92,122,0.1);
  border: 1px solid rgba(255,92,122,0.25);
  color: #ffb0c0;
}
html[data-theme="light"] .case-feedback.ok { color: #0a6b54; }
html[data-theme="light"] .case-feedback.bad { color: #9a2040; }
.case-right-hint {
  margin-top: 0.65rem;
  opacity: 0.95;
}
.case-takeaway {
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid rgba(255,255,255,0.1);
  font-weight: 650;
  color: var(--text);
}
.case-actions {
  margin-top: 1rem;
  display: flex;
  justify-content: flex-end;
}

/* Animations */
.anim-pop { animation: popIn 0.5s var(--ease-spring) both; }
.anim-fade { animation: fadeUp 0.45s var(--ease) both; }
.anim-slide { animation: slideIn 0.45s var(--ease) both; }
.anim-anno { animation: annoIn 0.5s var(--ease) both; }

@keyframes popIn {
  from { opacity: 0; transform: scale(0.7); }
  to { opacity: 1; transform: scale(1); }
}
@keyframes slideIn {
  from { opacity: 0; transform: translateX(-12px); }
  to { opacity: 1; transform: translateX(0); }
}
@keyframes annoIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 900px) {
  .sd-story { grid-template-columns: 1fr; }
  .sd-body { grid-template-columns: 1fr; }
  .sd-annotations { grid-template-columns: 1fr; }
  .sd-legend-grid { grid-template-columns: 1fr; }
  .scene-board { grid-template-columns: 1fr; }
  .scene-retro { grid-template-columns: 1fr; }
}

/* ===== Practice hub extras: PO Lab / Daily / Traps ===== */
.sd-tabs.wrap {
  flex-wrap: wrap;
  max-width: 520px;
  justify-content: flex-end;
}

.po-lab {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 1.25rem;
}
.po-col h3 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}
.po-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  min-height: 200px;
}
.po-item {
  display: grid;
  grid-template-columns: 36px 1fr 24px;
  gap: 0.65rem;
  align-items: center;
  padding: 0.85rem 0.9rem;
  border-radius: 12px;
  background: var(--glass);
  border: 1.5px solid var(--glass-border);
  cursor: grab;
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
  user-select: none;
}
.po-item:active { cursor: grabbing; }
.po-item.dragging {
  opacity: 0.85;
  border-color: var(--accent);
  box-shadow: 0 12px 32px rgba(124, 92, 255, 0.25);
  transform: scale(1.02);
}
.po-rank {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: rgba(124, 92, 255, 0.15);
  color: #c4b5fd;
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 0.8rem;
}
.po-body strong {
  display: block;
  font-size: 0.9rem;
  color: var(--text);
  margin-bottom: 0.15rem;
}
.po-body span {
  font-size: 0.78rem;
  color: var(--text-muted);
}
.po-grip {
  color: var(--text-muted);
  font-size: 1rem;
  letter-spacing: -2px;
}
.po-rules .trap-mini {
  margin: 0;
  padding-left: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: var(--text-dim);
}
.po-rules .trap-mini li {
  padding: 0.55rem 0.75rem;
  border-radius: 10px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
}
.po-hints {
  margin-top: 1rem;
  padding: 1rem;
  border-radius: var(--radius-sm);
  background: rgba(79, 172, 254, 0.08);
  border: 1px solid rgba(79, 172, 254, 0.2);
}
.po-hint-row {
  font-size: 0.85rem;
  color: var(--text-dim);
  padding: 0.35rem 0;
  border-bottom: 1px solid var(--glass-border);
}
.po-hint-row:last-child { border-bottom: none; }
.po-hint-row strong { color: var(--text); }

.daily-sim {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 1.25rem;
}
.daily-clock-wrap {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  text-align: center;
  grid-row: span 2;
}
.daily-clock {
  font-family: var(--mono);
  font-size: 3rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  color: var(--accent);
  margin-bottom: 0.75rem;
  font-variant-numeric: tabular-nums;
}
.daily-clock.urgent {
  color: var(--danger);
  animation: pulse 1s ease infinite;
}
.daily-feed {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 1.15rem;
  max-height: 320px;
  overflow-y: auto;
}
.daily-feed h3 {
  font-size: 0.85rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
}
.daily-msg {
  padding: 0.75rem 0.85rem;
  border-radius: 10px;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--glass-border);
  margin-bottom: 0.5rem;
}
.daily-msg strong {
  display: block;
  font-size: 0.8rem;
  color: var(--accent-2);
  margin-bottom: 0.25rem;
}
.daily-msg p {
  margin: 0;
  font-size: 0.88rem;
  color: var(--text-dim);
  line-height: 1.45;
}
.daily-msg.trap {
  border-color: rgba(255, 92, 122, 0.4);
  background: rgba(255, 92, 122, 0.08);
}
.daily-msg.trap strong { color: var(--danger); }
.daily-quiz { grid-column: 2; }

/* Traps catalog */
.trap-drill { margin-bottom: 1.5rem; }
.trap-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 1.25rem;
}
.trap-catalog { display: flex; flex-direction: column; gap: 1.5rem; }
.trap-cat h2 {
  font-size: 1.1rem;
  font-weight: 800;
  margin-bottom: 0.85rem;
  color: var(--text);
}
.trap-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 0.85rem;
}
.trap-card {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 1.1rem;
  border-top: 3px solid var(--trap, var(--accent));
  transition: transform 0.25s var(--ease), box-shadow 0.25s;
}
.trap-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}
.trap-card h3 {
  font-size: 0.95rem;
  font-weight: 750;
  margin-bottom: 0.75rem;
  color: var(--text);
  line-height: 1.35;
}
.trap-wrong, .trap-right {
  font-size: 0.85rem;
  padding: 0.65rem 0.75rem;
  border-radius: 10px;
  margin-bottom: 0.5rem;
  line-height: 1.45;
}
.trap-wrong {
  background: rgba(255, 92, 122, 0.08);
  border: 1px solid rgba(255, 92, 122, 0.2);
}
.trap-right {
  background: rgba(0, 212, 170, 0.08);
  border: 1px solid rgba(0, 212, 170, 0.2);
}
.trap-wrong span, .trap-right span {
  display: block;
  font-size: 0.68rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.3rem;
}
.trap-wrong span { color: var(--danger); }
.trap-right span { color: var(--accent-2); }
.trap-wrong p, .trap-right p { margin: 0; color: var(--text-dim); }
.trap-tip {
  font-size: 0.82rem;
  color: #c4b5fd;
  font-weight: 550;
  margin-top: 0.35rem;
}
html[data-theme="light"] .trap-tip { color: #5b45c4; }

@media (max-width: 900px) {
  .po-lab, .daily-sim { grid-template-columns: 1fr; }
  .daily-clock-wrap { grid-row: auto; }
  .daily-quiz { grid-column: auto; }
  .sd-tabs.wrap { max-width: 100%; justify-content: flex-start; }
}