/* ── Modern Components: Subject Cards, Segmented Controls, Options ── */

/* Hero on Setup */
.setup-hero {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 36px;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 14px;
  border-radius: var(--r-full);
  background: var(--accent-indigo-soft);
  border: 1px solid rgba(99, 102, 241, 0.28);
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  color: var(--accent-indigo);
  margin-bottom: 14px;
  letter-spacing: 0.04em;
}

.hero-pill::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-indigo);
  box-shadow: 0 0 10px var(--accent-indigo);
}

.setup-hero h2 {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: #fff;
  line-height: 1.15;
  margin-bottom: 12px;
}

.setup-hero h2 span.gradient-text {
  background: linear-gradient(135deg, #ffffff 40%, #94a3b8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.setup-hero p {
  color: var(--ink-secondary);
  font-size: 15px;
  line-height: 1.6;
}

/* 4 Interactive Hero Subject Cards Grid */
.subject-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 32px;
}

.subject-card {
  position: relative;
  padding: 24px;
  border-radius: var(--r-md);
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-hairline);
  cursor: pointer;
  transition: all 0.22s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  text-align: left;
  overflow: hidden;
}

.subject-card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, transparent 50%, rgba(255, 255, 255, 0.12));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

.subject-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-2px);
  box-shadow: 0 12px 30px -10px rgba(0, 0, 0, 0.6);
}

.subject-card[aria-selected="true"] {
  background: #151b2a;
  border-color: var(--accent-indigo);
  box-shadow: 0 0 0 1px var(--accent-indigo), 0 12px 36px -8px var(--accent-indigo-glow);
}

.subject-card[data-subject="Physics"][aria-selected="true"] {
  background: rgba(6, 182, 212, 0.08);
  border-color: var(--accent-cyan);
  box-shadow: 0 0 0 1px var(--accent-cyan), 0 12px 36px -8px var(--accent-cyan-glow);
}

.subject-card[data-subject="Chemistry"][aria-selected="true"] {
  background: rgba(16, 185, 129, 0.08);
  border-color: var(--accent-emerald);
  box-shadow: 0 0 0 1px var(--accent-emerald), 0 12px 36px -8px var(--accent-emerald-glow);
}

.subject-card[data-subject="Mathematics"][aria-selected="true"] {
  background: rgba(99, 102, 241, 0.08);
  border-color: var(--accent-indigo);
  box-shadow: 0 0 0 1px var(--accent-indigo), 0 12px 36px -8px var(--accent-indigo-glow);
}

.subject-card[data-subject="Mixed"][aria-selected="true"] {
  background: rgba(245, 158, 11, 0.08);
  border-color: var(--accent-amber);
  box-shadow: 0 0 0 1px var(--accent-amber), 0 12px 36px -8px var(--accent-amber-glow);
}

/* Card Icons & Header */
.card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 14px;
}

.card-glyph {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-size: 20px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-hairline);
}

.subject-card[data-subject="Physics"] .card-glyph {
  background: var(--accent-cyan-soft);
  border-color: rgba(6, 182, 212, 0.3);
  color: var(--accent-cyan);
}

.subject-card[data-subject="Chemistry"] .card-glyph {
  background: var(--accent-emerald-soft);
  border-color: rgba(16, 185, 129, 0.3);
  color: var(--accent-emerald);
}

.subject-card[data-subject="Mathematics"] .card-glyph {
  background: var(--accent-indigo-soft);
  border-color: rgba(99, 102, 241, 0.3);
  color: var(--accent-indigo);
}

.subject-card[data-subject="Mixed"] .card-glyph {
  background: var(--accent-amber-soft);
  border-color: rgba(245, 158, 11, 0.3);
  color: var(--accent-amber);
}

.card-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-muted);
  border: 1px solid var(--border-hairline);
  padding: 3px 9px;
  border-radius: var(--r-full);
}

.subject-card strong {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 4px;
  display: block;
}

.subject-card span.card-desc {
  font-size: 13px;
  color: var(--ink-secondary);
  line-height: 1.5;
}

/* Parameter Configuration Box */
.config-panel {
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-hairline);
  border-radius: var(--r-md);
  padding: 24px;
  margin-bottom: 28px;
}

.config-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.config-field label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-muted);
  margin-bottom: 8px;
}

/* Segmented Control Bar */
.segmented-control {
  display: flex;
  background: #0a0c12;
  border: 1px solid var(--border-hairline);
  border-radius: var(--r-md);
  padding: 3px;
  gap: 3px;
}

.segment-btn {
  flex: 1;
  padding: 8px 12px;
  border-radius: 9px;
  border: none;
  background: transparent;
  color: var(--ink-secondary);
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.16s ease;
  text-align: center;
}

.segment-btn:hover {
  color: #fff;
}

.segment-btn[aria-checked="true"] {
  background: #1e2638;
  color: #fff;
  font-weight: 600;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.35);
}

/* Select Box */
.styled-select {
  width: 100%;
  padding: 10px 14px;
  border-radius: var(--r-md);
  border: 1px solid var(--border-hairline);
  background: #0a0c12;
  color: var(--ink-primary);
  font-family: var(--font-sans);
  font-size: 13.5px;
  cursor: pointer;
  outline: none;
  transition: border-color 0.15s ease;
}

.styled-select:focus {
  border-color: var(--accent-indigo);
}

/* Primary Launch Action */
.launch-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  padding-top: 8px;
}

.launch-summary {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-secondary);
}

.launch-pill {
  padding: 4px 10px;
  border-radius: var(--r-full);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-hairline);
}

.btn-launch {
  padding: 14px 34px;
  border-radius: var(--r-md);
  border: none;
  background: linear-gradient(135deg, #6366f1, #4f46e5);
  color: #fff;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 10px 24px -4px rgba(99, 102, 241, 0.5);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-launch:hover {
  background: linear-gradient(135deg, #7175f3, #5b53eb);
  transform: translateY(-2px);
  box-shadow: 0 14px 32px -4px rgba(99, 102, 241, 0.65);
}

/* ── Active Quiz Screen ── */
.quiz-topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  flex-wrap: wrap;
  gap: 12px;
}

.quiz-meta-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.q-badge {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--accent-indigo);
  background: var(--accent-indigo-soft);
  border: 1px solid rgba(99, 102, 241, 0.3);
  padding: 4px 12px;
  border-radius: var(--r-full);
}

.q-topic {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-secondary);
}

.quiz-meta-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.timer-pill {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-primary);
  background: #0a0c12;
  border: 1px solid var(--border-hairline);
  padding: 5px 12px;
  border-radius: var(--r-full);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.timer-pill.alert {
  color: var(--accent-coral);
  border-color: var(--accent-coral);
  background: var(--accent-coral-soft);
  animation: pulseTimer 1s infinite;
}

@keyframes pulseTimer {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

.marking-pill {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--accent-emerald);
  background: var(--accent-emerald-soft);
  border: 1px solid rgba(16, 185, 129, 0.3);
  padding: 4px 10px;
  border-radius: var(--r-full);
}

.quiz-progress-track {
  width: 100%;
  height: 4px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: var(--r-full);
  margin-bottom: 28px;
  overflow: hidden;
}

.quiz-progress-bar {
  height: 100%;
  background: linear-gradient(90deg, #6366f1, #06b6d4, #10b981);
  transition: width 0.35s ease;
}

/* Question Statement */
.q-title {
  font-size: clamp(1.25rem, 2.2vw, 1.55rem);
  font-weight: 600;
  color: #fff;
  line-height: 1.5;
  margin-bottom: 28px;
}

/* Option Cards (A, B, C, D) */
.options-grid {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 24px;
}

.option-row {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  border-radius: var(--r-md);
  background: #111520;
  border: 1px solid var(--border-hairline);
  cursor: pointer;
  transition: all 0.16s cubic-bezier(0.16, 1, 0.3, 1);
}

.option-row:hover {
  background: #171d2b;
  border-color: var(--border-hover);
  transform: translateX(3px);
}

.option-key {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: #1a2233;
  color: var(--ink-secondary);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  display: grid;
  place-items: center;
  flex-shrink: 0;
  border: 1px solid var(--border-hairline);
}

.option-text {
  flex: 1;
  font-size: 15px;
  line-height: 1.5;
  color: var(--ink-primary);
}

/* Option Selected States */
.option-row.selected {
  border-color: var(--accent-indigo);
  background: #171c2f;
}

.option-row.correct {
  border-color: var(--accent-emerald);
  background: rgba(16, 185, 129, 0.12);
  color: #d1fae5;
}

.option-row.correct .option-key {
  background: var(--accent-emerald);
  color: #064e3b;
  border-color: var(--accent-emerald);
}

.option-row.incorrect {
  border-color: var(--accent-coral);
  background: rgba(244, 63, 94, 0.12);
  color: #ffe4e6;
}

.option-row.incorrect .option-key {
  background: var(--accent-coral);
  color: #fff;
  border-color: var(--accent-coral);
}

/* Worked Solution Box */
.solution-drawer {
  display: none;
  background: rgba(245, 158, 11, 0.08);
  border-left: 3px solid var(--accent-amber);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  padding: 16px 20px;
  margin-top: 20px;
  font-size: 14.5px;
  color: #fef3c7;
  line-height: 1.6;
}

.solution-drawer.show {
  display: block;
  animation: fadeIn 0.25s ease both;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Quiz Action Footer */
.quiz-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding-top: 24px;
  margin-top: 28px;
  border-top: 1px solid var(--border-hairline);
  flex-wrap: wrap;
}

.btn-ghost {
  background: transparent;
  color: var(--ink-secondary);
  border: 1px solid var(--border-hairline);
  padding: 10px 20px;
  border-radius: var(--r-md);
  font-family: var(--font-sans);
  font-size: 13.5px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.16s ease;
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.05);
  color: #fff;
}

.btn-skip {
  background: var(--accent-amber-soft);
  color: var(--accent-amber);
  border: 1px solid rgba(245, 158, 11, 0.35);
  padding: 10px 20px;
  border-radius: var(--r-md);
  font-family: var(--font-sans);
  font-size: 13.5px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.16s ease;
}

.btn-skip:hover:not(:disabled) {
  background: rgba(245, 158, 11, 0.2);
  border-color: var(--accent-amber);
}

.btn-next {
  background: linear-gradient(135deg, #6366f1, #4f46e5);
  color: #fff;
  border: none;
  padding: 10px 26px;
  border-radius: var(--r-md);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.4);
  transition: all 0.16s ease;
}

.btn-next:hover:not(:disabled) {
  background: linear-gradient(135deg, #7175f3, #5b53eb);
  transform: translateY(-1px);
}

.btn-next:disabled, .btn-skip:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
}

/* ── Quick-Start Preset Drills ── */
.presets-section {
  margin-bottom: 28px;
}

.presets-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-muted);
  margin-bottom: 12px;
}

.presets-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.preset-tile {
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-hairline);
  border-radius: var(--r-md);
  padding: 16px;
  text-align: left;
  cursor: pointer;
  transition: all 0.18s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.preset-tile:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px -6px rgba(0, 0, 0, 0.5);
}

.preset-tile .tile-num {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--accent-indigo);
  letter-spacing: 0.04em;
  margin-bottom: 2px;
}

.preset-tile strong {
  font-size: 14.5px;
  font-weight: 700;
  color: #fff;
}

.preset-tile span {
  font-size: 12.5px;
  color: var(--ink-secondary);
  line-height: 1.4;
}

/* Mock Exam Subject Navigation */
.mock-subject-nav {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.mock-subject-button {
  padding: 8px 16px;
  border-radius: var(--r-full);
  background: #0a0c12;
  border: 1px solid var(--border-hairline);
  color: var(--ink-secondary);
  font-family: var(--font-sans);
  font-size: 13px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  transition: all 0.16s ease;
}

.mock-subject-button:hover {
  color: #fff;
  border-color: var(--border-hover);
}

.mock-subject-button[aria-pressed="true"] {
  background: #171d2e;
  border-color: var(--accent-indigo);
  color: #fff;
  font-weight: 600;
}

.mock-subject-button strong {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--accent-indigo);
}

/* Stats Footer on Setup Screen */
.stats-footer {
  margin-top: 36px;
  padding-top: 28px;
  border-top: 1px solid var(--border-hairline);
}

.stats-footer-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 16px;
}

.stats-footer-header h3 {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: #fff;
  text-transform: uppercase;
  font-family: var(--font-mono);
}

.stats-footer-header span {
  font-size: 12px;
  color: var(--ink-muted);
  font-family: var(--font-mono);
}

.stats-pill-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.stats-pill-card {
  background: var(--bg-card-subtle);
  border: 1px solid var(--border-hairline);
  border-radius: var(--r-md);
  padding: 14px 18px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.stats-pill-card span {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--ink-secondary);
}

.stats-pill-card strong {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  color: #fff;
}

@media (max-width: 680px) {
  .subject-grid {
    grid-template-columns: 1fr;
  }
  .config-grid {
    grid-template-columns: 1fr;
  }
  .presets-grid {
    grid-template-columns: 1fr;
  }
  .stats-pill-grid {
    grid-template-columns: 1fr;
  }
}