:root {
  --bg-page: #f8fafc;
  --bg-card: #ffffff;
  --bg-subtle: #f1f5f9;
  --bg-elevated: #e2e8f0;
  --text-main: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --border-color: #e2e8f0;
  --border-strong: #cbd5e1;

  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --primary-light: #eef2ff;
  --primary-border: #c7d2fe;

  --success: #059669;
  --success-bg: #ecfdf5;
  --success-border: #6ee7b7;

  --danger: #dc2626;
  --danger-bg: #fef2f2;
  --danger-border: #fca5a5;

  --warning: #d97706;
  --warning-bg: #fffbeb;
  --warning-border: #fde68a;

  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.07);
  --shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.12);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
}

[data-theme="dark"] {
  --bg-page: #0b0f19;
  --bg-card: #151c2c;
  --bg-subtle: #1e293b;
  --bg-elevated: #334155;
  --text-main: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --border-color: #263349;
  --border-strong: #3b4d6b;

  --primary: #6366f1;
  --primary-hover: #818cf8;
  --primary-light: rgba(99, 102, 241, 0.16);
  --primary-border: rgba(129, 140, 248, 0.35);

  --success: #10b981;
  --success-bg: rgba(16, 185, 129, 0.14);
  --success-border: rgba(16, 185, 129, 0.4);

  --danger: #ef4444;
  --danger-bg: rgba(239, 68, 68, 0.14);
  --danger-border: rgba(239, 68, 68, 0.4);

  --warning: #f59e0b;
  --warning-bg: rgba(245, 158, 11, 0.14);
  --warning-border: rgba(245, 158, 11, 0.4);

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 14px 36px rgba(0, 0, 0, 0.55);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, Helvetica, Arial, sans-serif;
  background-color: var(--bg-page);
  color: var(--text-main);
  line-height: 1.55;
  min-height: 100vh;
}

/* Header */
.app-header {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: var(--shadow-sm);
}

.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0.75rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  cursor: pointer;
  user-select: none;
}

.brand-logo {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: linear-gradient(135deg, #4f46e5, #0891b2);
  color: #fff;
  font-weight: 800;
  font-size: 1.05rem;
  display: flex;
  align-items: center;
  justify-content: center;
  letter-spacing: 0.5px;
  flex-shrink: 0;
}

.brand-title {
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1.2;
}

.brand-subtitle {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  background: var(--bg-subtle);
  padding: 0.28rem;
  border-radius: var(--radius-md);
}

.nav-btn {
  border: none;
  background: transparent;
  color: var(--text-secondary);
  padding: 0.5rem 0.9rem;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: all 0.15s ease;
}

.nav-btn:hover {
  color: var(--text-main);
  background: rgba(100, 116, 139, 0.1);
}

.nav-btn.active {
  background: var(--bg-card);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.badge-count {
  background: var(--danger);
  color: #fff;
  font-size: 0.72rem;
  padding: 0.08rem 0.45rem;
  border-radius: 999px;
  font-weight: 700;
}

.header-stats {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.stat-pill {
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

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

.icon-btn {
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: background 0.15s;
}

.icon-btn:hover {
  background: var(--bg-elevated);
}

/* Main container & views */
.app-main {
  max-width: 1280px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
}

.view-section {
  display: none;
}

.view-section.active {
  display: block;
  animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  padding: 0.55rem 1rem;
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
  text-decoration: none;
}

.btn-lg {
  padding: 0.7rem 1.25rem;
  font-size: 0.96rem;
}

.btn-sm {
  padding: 0.35rem 0.75rem;
  font-size: 0.82rem;
}

.btn-block {
  width: 100%;
}

.btn-primary {
  background: var(--primary);
  color: #ffffff;
}

.btn-primary:hover {
  background: var(--primary-hover);
}

.btn-secondary {
  background: var(--primary-light);
  color: var(--primary);
  border-color: var(--primary-border);
}

.btn-secondary:hover {
  filter: brightness(0.96);
}

.btn-outline {
  background: var(--bg-card);
  color: var(--text-main);
  border-color: var(--border-strong);
}

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

.btn-text {
  background: none;
  border: none;
  color: var(--primary);
  font-weight: 600;
  font-size: 0.86rem;
  cursor: pointer;
  padding: 0.2rem 0.4rem;
  border-radius: 6px;
}

.btn-text:hover {
  background: var(--primary-light);
}

.btn-link-danger {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 0.78rem;
  cursor: pointer;
  text-decoration: underline;
  margin-top: 0.75rem;
}

.btn-link-danger:hover {
  color: var(--danger);
}

/* Hero Banner */
.hero-banner {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  display: grid;
  grid-template-columns: 1fr 310px;
  gap: 1.75rem;
  box-shadow: var(--shadow-sm);
  margin-bottom: 2rem;
}

.hero-kicker {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 0.76rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
  margin-bottom: 0.65rem;
}

.hero-text h2 {
  font-size: 1.65rem;
  line-height: 1.25;
  margin-bottom: 0.65rem;
}

.hero-text p {
  color: var(--text-secondary);
  font-size: 0.98rem;
  margin-bottom: 1.25rem;
  max-width: 68ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.hero-progress-card {
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.hero-progress-card h3 {
  font-size: 0.92rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}

.overall-ring-wrap {
  margin: 0.6rem 0;
}

.overall-percent {
  font-size: 2.1rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.1;
}

.overall-sub {
  font-size: 0.84rem;
  color: var(--text-secondary);
}

.progress-bar-track {
  width: 100%;
  height: 8px;
  background: var(--bg-elevated);
  border-radius: 999px;
  overflow: hidden;
  margin: 0.5rem 0 0.85rem;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, #4f46e5, #0891b2);
  border-radius: 999px;
  transition: width 0.3s ease;
}

.mini-stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
  border-top: 1px solid var(--border-color);
  padding-top: 0.75rem;
  text-align: center;
}

.mini-label {
  display: block;
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* Dashboard Topic Cards */
.section-header-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.text-muted {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.topics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 1.25rem;
}

.topic-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.35rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}

.topic-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-strong);
}

.topic-card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.65rem;
}

.topic-icon-badge {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  flex-shrink: 0;
}

.topic-card h4 {
  font-size: 1.08rem;
  margin-bottom: 0.25rem;
}

.topic-desc {
  color: var(--text-secondary);
  font-size: 0.88rem;
  margin-bottom: 0.9rem;
}

.subtopic-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 1rem;
}

.subtopic-chip {
  font-size: 0.75rem;
  background: var(--bg-subtle);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.15s;
}

.subtopic-chip:hover {
  background: var(--primary-light);
  color: var(--primary);
  border-color: var(--primary-border);
}

.topic-card-footer {
  border-top: 1px solid var(--border-color);
  padding-top: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.topic-progress-text {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 600;
}

.topic-card-actions {
  display: flex;
  gap: 0.45rem;
}

/* Practice Trainer View */
.trainer-controls-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  margin-bottom: 1.25rem;
  box-shadow: var(--shadow-sm);
}

.controls-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 0.85rem;
  margin-bottom: 0.85rem;
}

.control-group label {
  display: block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  margin-bottom: 0.3rem;
}

.form-select {
  width: 100%;
  padding: 0.5rem 0.7rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--bg-page);
  color: var(--text-main);
  font-size: 0.88rem;
  font-weight: 500;
}

.trainer-status-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  border-top: 1px solid var(--border-color);
  padding-top: 0.65rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.dot-sep {
  margin: 0 0.35rem;
  color: var(--text-muted);
}

/* Question Card */
.question-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-md);
  max-width: 900px;
  margin: 0 auto;
}

.q-meta-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.q-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  align-items: center;
}

.badge-topic {
  font-size: 0.76rem;
  font-weight: 700;
  padding: 0.22rem 0.65rem;
  border-radius: 999px;
  color: #fff;
}

.badge-subtopic {
  font-size: 0.76rem;
  font-weight: 600;
  padding: 0.22rem 0.65rem;
  border-radius: 999px;
  background: var(--bg-subtle);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.badge-type {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.18rem 0.55rem;
  border-radius: 6px;
  background: var(--primary-light);
  color: var(--primary);
}

.q-prompt {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
  font-weight: 500;
}

.q-sentence-box {
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.4rem;
  font-size: 1.22rem;
  font-weight: 600;
  line-height: 1.65;
  margin-bottom: 1.35rem;
  color: var(--text-main);
}

.q-blank-highlight {
  display: inline-block;
  min-width: 72px;
  padding: 0.05rem 0.55rem;
  margin: 0 0.15rem;
  border-bottom: 3px solid var(--primary);
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 6px 6px 0 0;
  text-align: center;
  font-weight: 700;
}

/* Multiple Choice Options */
.choice-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.choice-btn {
  background: var(--bg-page);
  border: 2px solid var(--border-strong);
  border-radius: var(--radius-md);
  padding: 0.85rem 1rem;
  text-align: left;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-main);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  transition: all 0.12s ease;
}

.choice-btn:hover:not(:disabled) {
  border-color: var(--primary);
  background: var(--primary-light);
}

.choice-btn.selected {
  border-color: var(--primary);
  background: var(--primary-light);
  box-shadow: 0 0 0 2px rgba(79, 70, 229, 0.15);
}

.choice-btn.correct {
  border-color: var(--success);
  background: var(--success-bg);
  color: var(--success);
}

.choice-btn.wrong {
  border-color: var(--danger);
  background: var(--danger-bg);
  color: var(--danger);
}

.choice-key {
  width: 26px;
  height: 26px;
  border-radius: 6px;
  background: var(--bg-subtle);
  border: 1px solid var(--border-strong);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text-secondary);
  flex-shrink: 0;
}

/* Multi-blank interactive slots */
.inline-blank-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 68px;
  padding: 0.12rem 0.65rem;
  margin: 0.15rem 0.2rem;
  border: 2px dashed var(--primary);
  background: var(--bg-card);
  color: var(--primary);
  border-radius: 8px;
  font-size: 1.08rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.15s;
}

.inline-blank-btn.active-slot {
  border-style: solid;
  background: var(--primary-light);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.2);
}

.inline-blank-btn.filled {
  border-style: solid;
}

.inline-blank-btn.slot-correct {
  border-color: var(--success);
  background: var(--success-bg);
  color: var(--success);
}

.inline-blank-btn.slot-wrong {
  border-color: var(--danger);
  background: var(--danger-bg);
  color: var(--danger);
  text-decoration: line-through;
}

.multi-blank-picker {
  background: var(--bg-page);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  padding: 1rem;
  margin-bottom: 1.25rem;
}

.picker-label {
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.6rem;
}

.picker-options {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.picker-chip {
  padding: 0.55rem 1.1rem;
  border-radius: var(--radius-sm);
  border: 2px solid var(--border-strong);
  background: var(--bg-card);
  color: var(--text-main);
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.12s;
}

.picker-chip:hover {
  border-color: var(--primary);
  background: var(--primary-light);
}

.picker-chip.active {
  border-color: var(--primary);
  background: var(--primary);
  color: #fff;
}

/* Reorder (Word Tile Builder) */
.reorder-zone-label {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
}

.reorder-answer-zone {
  min-height: 68px;
  background: var(--bg-subtle);
  border: 2px dashed var(--border-strong);
  border-radius: var(--radius-md);
  padding: 0.85rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  margin-bottom: 1rem;
}

.reorder-answer-zone.zone-correct {
  border-style: solid;
  border-color: var(--success);
  background: var(--success-bg);
}

.reorder-answer-zone.zone-wrong {
  border-style: solid;
  border-color: var(--danger);
  background: var(--danger-bg);
}

.reorder-bank-zone {
  min-height: 58px;
  background: var(--bg-page);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.85rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.word-tile {
  padding: 0.48rem 0.85rem;
  border-radius: 8px;
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  box-shadow: var(--shadow-sm);
  color: var(--text-main);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  user-select: none;
  transition: transform 0.1s, border-color 0.1s, background 0.1s;
}

.word-tile:hover:not(:disabled) {
  border-color: var(--primary);
  transform: translateY(-1px);
}

.word-tile.placed {
  background: var(--primary-light);
  border-color: var(--primary-border);
  color: var(--primary);
}

.reorder-helper-bar {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

/* Fill-in Input & Quick Chips */
.fill-controls {
  margin-bottom: 1.25rem;
}

.fill-input-row {
  display: flex;
  gap: 0.65rem;
  margin-bottom: 0.75rem;
}

.fill-input {
  flex: 1;
  padding: 0.75rem 1rem;
  font-size: 1.05rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 2px solid var(--border-strong);
  background: var(--bg-page);
  color: var(--text-main);
}

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

.quick-chips-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.quick-chips-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-right: 0.25rem;
}

/* Hint Box & Action Bar */
.hint-box {
  background: var(--warning-bg);
  border: 1px solid var(--warning-border);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  margin-bottom: 1rem;
  font-size: 0.9rem;
}

.q-action-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border-color);
}

/* Feedback Panel */
.feedback-panel {
  margin-top: 1.35rem;
  border-radius: var(--radius-md);
  padding: 1.25rem;
  border: 2px solid var(--border-color);
  animation: fadeIn 0.2s ease;
}

.feedback-panel.is-correct {
  background: var(--success-bg);
  border-color: var(--success-border);
}

.feedback-panel.is-wrong {
  background: var(--danger-bg);
  border-color: var(--danger-border);
}

.feedback-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.feedback-verdict {
  font-size: 1.1rem;
  font-weight: 800;
}

.feedback-rule-title {
  font-size: 0.85rem;
  font-weight: 700;
  padding: 0.2rem 0.65rem;
  border-radius: 999px;
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
}

.formula-box {
  background: var(--bg-card);
  border-left: 4px solid var(--primary);
  padding: 0.65rem 0.95rem;
  border-radius: 6px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.88rem;
  font-weight: 700;
  margin-bottom: 0.8rem;
  color: var(--text-main);
}

.feedback-explanation {
  font-size: 0.96rem;
  color: var(--text-main);
  margin-bottom: 0.75rem;
}

.trap-box {
  background: var(--bg-card);
  border: 1px solid var(--warning-border);
  border-left: 4px solid var(--warning);
  padding: 0.6rem 0.9rem;
  border-radius: 6px;
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.shortcuts-hint {
  max-width: 900px;
  margin: 0.85rem auto 0;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1.25rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

kbd {
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: 4px;
  padding: 0.1rem 0.4rem;
  font-size: 0.75rem;
  font-family: inherit;
  font-weight: 700;
}

/* Cheat Sheets & Decision Trees View */
.cheatsheet-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 1.5rem;
  align-items: start;
}

.cheatsheet-sidebar {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.1rem;
  position: sticky;
  top: 76px;
}

.cheatsheet-sidebar h3 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 0.65rem;
}

.topic-tab-list {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.topic-tab-btn {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  width: 100%;
  text-align: left;
  padding: 0.6rem 0.75rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.12s;
}

.topic-tab-btn:hover {
  background: var(--bg-subtle);
  color: var(--text-main);
}

.topic-tab-btn.active {
  background: var(--primary-light);
  color: var(--primary);
  border-color: var(--primary-border);
}

.sidebar-divider {
  border: none;
  border-top: 1px solid var(--border-color);
  margin: 0.9rem 0;
}

.cheatsheet-panel {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
}

.cs-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}

.decision-steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 0.85rem;
  margin-bottom: 1.75rem;
}

.decision-step-card {
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
  border-top: 3px solid var(--primary);
  border-radius: var(--radius-sm);
  padding: 0.9rem 1rem;
}

.decision-step-card h5 {
  font-size: 0.92rem;
  margin-bottom: 0.35rem;
  color: var(--text-main);
}

.decision-step-card p {
  font-size: 0.84rem;
  color: var(--text-secondary);
}

.rule-section-block {
  margin-bottom: 1.75rem;
}

.rule-section-block h4 {
  font-size: 1.1rem;
  margin-bottom: 0.45rem;
}

.rule-table-wrap {
  overflow-x: auto;
  margin-top: 0.65rem;
}

.rule-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.rule-table th,
.rule-table td {
  border: 1px solid var(--border-color);
  padding: 0.65rem 0.85rem;
  text-align: left;
}

.rule-table th {
  background: var(--bg-subtle);
  font-weight: 700;
}

.example-contrast-list {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  margin-top: 0.65rem;
}

.example-contrast-item {
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  font-size: 0.9rem;
}

.ex-good {
  color: var(--success);
  font-weight: 700;
}

.ex-note {
  color: var(--text-secondary);
}

/* Weak Spots Review View */
.review-header-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.35rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.review-list-container {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.review-item-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.1rem 1.35rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Modals */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.6);
  backdrop-filter: blur(3px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.25rem;
  z-index: 100;
}

.modal-backdrop[hidden] {
  display: none;
}

.modal-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 680px;
  max-height: 88vh;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-lg);
}

.modal-card.modal-lg {
  max-width: 920px;
}

.modal-header {
  padding: 1.15rem 1.4rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.badge-pill {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  background: var(--primary-light);
  color: var(--primary);
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  margin-bottom: 0.25rem;
}

.modal-body {
  padding: 1.4rem;
  overflow-y: auto;
}

.wizard-step-box {
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-bottom: 1rem;
}

.wizard-options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.75rem;
  margin-top: 1rem;
}

.wizard-result-box {
  background: var(--success-bg);
  border: 2px solid var(--success-border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-top: 1rem;
}

@media (max-width: 860px) {
  .hero-banner {
    grid-template-columns: 1fr;
  }
  .cheatsheet-layout {
    grid-template-columns: 1fr;
  }
  .cheatsheet-sidebar {
    position: static;
  }
  .example-contrast-item {
    grid-template-columns: 1fr;
  }
}