/* ═══════════════════════════════════════════════════════════════
   Texas Plumbing Prep — Main Stylesheet
   © 2025 Oliver Granja – ViscaCode
   ═══════════════════════════════════════════════════════════════ */

/* ──────────────────────────────────────────────────────────────
   1. THEME VARIABLES (Dark default, Light override)
   ────────────────────────────────────────────────────────────── */
:root {
  /* Dark theme (default) */
  --bg: #0d1117;
  --surface: #161b22;
  --card: #1c2330;
  --border: #30363d;
  --accent: #f97316;
  --accent2: #fb923c;
  --green: #22c55e;
  --red: #ef4444;
  --yellow: #eab308;
  --text: #e6edf3;
  --muted: #8b949e;
  --shadow: rgba(0, 0, 0, .5);
  --pulse-green: rgba(34, 197, 94, .1);
  --pulse-green-br: rgba(34, 197, 94, .08);
  --pulse-red: rgba(239, 68, 68, .1);
  --pulse-red-br: rgba(239, 68, 68, .08);
  --pulse-accent: rgba(249, 115, 22, .08);
  --pulse-accent-br: rgba(249, 115, 22, .12);
  --accent-soft: rgba(249, 115, 22, .15);
  --accent-soft-br: rgba(249, 115, 22, .25);
  --trap-soft: rgba(239, 68, 68, .15);
  --trap-soft-br: rgba(239, 68, 68, .25);
  --overlay-bg: rgba(0, 0, 0, .78);
  --radius: 12px;
}

[data-theme="light"] {
  --bg: #f8f6f1;
  --surface: #ffffff;
  --card: #ffffff;
  --border: #e5e7eb;
  --accent: #ea580c;
  --accent2: #f97316;
  --green: #16a34a;
  --red: #dc2626;
  --yellow: #ca8a04;
  --text: #1a1f2e;
  --muted: #6b7280;
  --shadow: rgba(30, 40, 60, .12);
  --pulse-green: rgba(22, 163, 74, .12);
  --pulse-green-br: rgba(22, 163, 74, .07);
  --pulse-red: rgba(220, 38, 38, .1);
  --pulse-red-br: rgba(220, 38, 38, .06);
  --pulse-accent: rgba(234, 88, 12, .08);
  --pulse-accent-br: rgba(234, 88, 12, .12);
  --accent-soft: rgba(234, 88, 12, .12);
  --accent-soft-br: rgba(234, 88, 12, .3);
  --trap-soft: rgba(220, 38, 38, .1);
  --trap-soft-br: rgba(220, 38, 38, .3);
  --overlay-bg: rgba(40, 45, 55, .55);
}

/* ──────────────────────────────────────────────────────────────
   2. RESET & BASE
   ────────────────────────────────────────────────────────────── */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 24px 16px 60px;
}

/* Smooth theme transitions */
body, .question-card, #screen-start, .result-hero, .review-item, .option-btn,
.info-box, .exam-card, .stat-box, #timer-bar, .timeout-box, .hero-logo,
.info-card, .support-section, .page-footer {
  transition: background-color .3s ease, border-color .3s ease, color .3s ease, box-shadow .3s ease;
}

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 99px; }

/* ──────────────────────────────────────────────────────────────
   3. THEME TOGGLE BUTTON
   ────────────────────────────────────────────────────────────── */
#theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 500;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--card);
  border: 1.5px solid var(--border);
  color: var(--text);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  line-height: 1;
  box-shadow: 0 4px 12px var(--shadow);
  transition: all .25s ease;
}
#theme-toggle:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px var(--shadow);
}
#theme-toggle:active { transform: translateY(0); }

#theme-toggle .icon-sun,
#theme-toggle .icon-moon {
  position: absolute;
  transition: opacity .25s ease, transform .35s ease;
}
[data-theme="light"] #theme-toggle .icon-sun { opacity: 0; transform: rotate(90deg) scale(.5); }
[data-theme="light"] #theme-toggle .icon-moon { opacity: 1; transform: rotate(0) scale(1); }
:root:not([data-theme="light"]) #theme-toggle .icon-sun { opacity: 1; transform: rotate(0) scale(1); }
:root:not([data-theme="light"]) #theme-toggle .icon-moon { opacity: 0; transform: rotate(-90deg) scale(.5); }

/* ──────────────────────────────────────────────────────────────
   4. HEADER
   ────────────────────────────────────────────────────────────── */
header {
  width: 100%;
  max-width: 780px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  margin-bottom: 32px;
}

.hero-logo {
  width: 200px;
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  filter: drop-shadow(0 8px 20px rgba(0, 0, 0, .5));
}
.hero-logo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 50%;
}
[data-theme="light"] .hero-logo { filter: drop-shadow(0 4px 12px rgba(30, 40, 60, .15)); }

h1 {
  font-family: 'Bebas Neue', sans-serif;
  font-size: clamp(2.4rem, 6.5vw, 3.8rem);
  letter-spacing: .04em;
  color: var(--text);
  text-align: center;
  line-height: 1;
}
h1 span { color: var(--accent); }

.subtitle {
  font-size: 13px;
  color: var(--muted);
  text-align: center;
  max-width: 500px;
}

/* ──────────────────────────────────────────────────────────────
   5. TIMER BAR
   ────────────────────────────────────────────────────────────── */
#timer-bar {
  width: 100%;
  max-width: 780px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
  position: sticky;
  top: 12px;
  z-index: 100;
  backdrop-filter: blur(8px);
}
.timer-left { display: flex; align-items: center; gap: 10px; }

#time-display {
  font-family: 'DM Mono', monospace;
  font-size: 1.6rem;
  font-weight: 500;
  color: var(--accent);
  min-width: 80px;
  transition: color .3s;
}
#time-display.warning { color: var(--yellow); }
#time-display.danger {
  color: var(--red);
  animation: pulse 1s infinite;
}
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: .45; } }

.progress-wrap {
  flex: 1;
  background: var(--border);
  border-radius: 99px;
  height: 8px;
  overflow: hidden;
}
#time-progress {
  height: 100%;
  border-radius: 99px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  transition: width .9s linear, background .5s;
  width: 100%;
}
#time-progress.warning { background: linear-gradient(90deg, var(--yellow), #fbbf24); }
#time-progress.danger { background: linear-gradient(90deg, var(--red), #f87171); }

#q-counter {
  font-family: 'DM Mono', monospace;
  font-size: 12px;
  color: var(--muted);
  white-space: nowrap;
}

[data-theme="light"] #timer-bar { background: rgba(255, 255, 255, .92); }

/* ──────────────────────────────────────────────────────────────
   6. START SCREEN
   ────────────────────────────────────────────────────────────── */
#screen-start {
  width: 100%;
  max-width: 780px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 44px 40px;
  text-align: center;
}
#screen-start h2 {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 2rem;
  letter-spacing: .04em;
  margin-bottom: 10px;
  color: var(--accent);
}
#screen-start p {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 8px;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin: 24px 0;
}
.info-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 10px;
}
.info-box .num {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 1.9rem;
  color: var(--accent);
}
.info-box .lbl {
  font-size: 11px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .06em;
  margin-top: 2px;
}

.exam-selector {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin: 24px 0;
}
.exam-card {
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: 14px;
  padding: 22px 16px;
  cursor: pointer;
  transition: border-color .2s, background .2s, transform .15s;
  text-align: center;
}
.exam-card:hover {
  border-color: var(--accent);
  background: var(--pulse-accent);
  transform: translateY(-3px);
}
.exam-card.selected {
  border-color: var(--accent);
  background: var(--pulse-accent-br);
}
[data-theme="light"] .exam-card:hover { background: var(--accent-soft); }

.exam-card .exam-num {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 2.4rem;
  color: var(--accent);
  line-height: 1;
}
.exam-card .exam-label {
  font-size: 11px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .07em;
  margin-top: 4px;
}
.exam-card .exam-desc {
  font-size: 11px;
  color: var(--muted);
  margin-top: 6px;
  font-style: italic;
}

/* ──────────────────────────────────────────────────────────────
   7. QUIZ SCREEN
   ────────────────────────────────────────────────────────────── */
#screen-quiz { width: 100%; max-width: 780px; }

.question-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px 28px 24px;
  margin-bottom: 16px;
  animation: slideIn .35s ease;
}
@keyframes slideIn {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: translateY(0); }
}

.q-tag {
  font-family: 'DM Mono', monospace;
  font-size: 11px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .08em;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.q-tag::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
  min-width: 20px;
}

.section-pill {
  font-size: 10px;
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: 99px;
  padding: 2px 10px;
  border: 1px solid var(--accent-soft-br);
  white-space: nowrap;
}
.trap-pill {
  font-size: 10px;
  background: var(--trap-soft);
  color: var(--red);
  border-radius: 99px;
  padding: 2px 10px;
  border: 1px solid var(--trap-soft-br);
  white-space: nowrap;
  font-weight: 600;
}

.q-text {
  font-size: 1.05rem;
  font-weight: 500;
  line-height: 1.6;
  margin-bottom: 20px;
  color: var(--text);
}

.options-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  list-style: none;
}
.option-btn {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: 10px;
  padding: 13px 16px;
  cursor: pointer;
  text-align: left;
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  font-size: .92rem;
  transition: border-color .2s, background .2s, transform .1s;
  width: 100%;
}
.option-btn:hover:not(:disabled) {
  border-color: var(--accent);
  background: var(--pulse-accent);
  transform: translateX(3px);
}
[data-theme="light"] .option-btn:hover:not(:disabled) { background: var(--accent-soft); }

.option-btn .opt-letter {
  font-family: 'DM Mono', monospace;
  font-size: .78rem;
  color: var(--muted);
  min-width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--border);
  border-radius: 6px;
  transition: background .2s, color .2s;
  flex-shrink: 0;
}
.option-btn.correct {
  border-color: var(--green);
  background: var(--pulse-green);
}
.option-btn.correct .opt-letter { background: var(--green); color: #000; }
.option-btn.wrong {
  border-color: var(--red);
  background: var(--pulse-red);
}
.option-btn.wrong .opt-letter { background: var(--red); color: #fff; }
.option-btn.reveal { border-color: rgba(34, 197, 94, .3); opacity: .6; }
.option-btn:disabled { cursor: default; }

.feedback-box {
  margin-top: 16px;
  padding: 13px 16px;
  border-radius: 10px;
  font-size: .88rem;
  line-height: 1.6;
  display: none;
  border-left: 3px solid transparent;
}
.feedback-box.correct-fb {
  background: var(--pulse-green-br);
  border-color: var(--green);
  color: #86efac;
  display: block;
}
.feedback-box.wrong-fb {
  background: var(--pulse-red-br);
  border-color: var(--red);
  color: #fca5a5;
  display: block;
}
[data-theme="light"] .feedback-box.correct-fb { color: #166534; }
[data-theme="light"] .feedback-box.wrong-fb { color: #991b1b; }

/* ──────────────────────────────────────────────────────────────
   8. NAVIGATION BUTTONS
   ────────────────────────────────────────────────────────────── */
.nav-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-top: 4px;
}
.btn-next, .btn-prev {
  font-family: 'DM Sans', sans-serif;
  font-size: .9rem;
  font-weight: 600;
  padding: 11px 26px;
  border-radius: 9px;
  border: none;
  cursor: pointer;
  transition: opacity .2s, transform .1s;
}
.btn-next {
  background: var(--accent);
  color: #fff;
  margin-left: auto;
}
.btn-next:hover { opacity: .85; transform: translateY(-1px); }
.btn-next:disabled { opacity: .35; cursor: default; transform: none; }

.btn-prev {
  background: transparent;
  color: var(--muted);
  border: 1.5px solid var(--border);
}
.btn-prev:hover { color: var(--text); border-color: var(--muted); }

.btn-primary {
  background: var(--accent);
  color: #fff;
  font-family: 'DM Sans', sans-serif;
  font-size: .95rem;
  font-weight: 700;
  padding: 14px 36px;
  border-radius: 10px;
  border: none;
  cursor: pointer;
  letter-spacing: .03em;
  transition: opacity .2s, transform .15s;
  display: inline-block;
}
.btn-primary:hover { opacity: .85; transform: translateY(-2px); }
.btn-primary:disabled { opacity: .4; cursor: not-allowed; }
.btn-primary:disabled:hover { transform: none; }

/* ──────────────────────────────────────────────────────────────
   9. RESULT SCREEN
   ────────────────────────────────────────────────────────────── */
#screen-result { width: 100%; max-width: 780px; display: none; }

.result-hero {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 40px 36px;
  text-align: center;
  margin-bottom: 20px;
}
.score-ring {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  border: 5px solid var(--border);
}
.score-ring .big-num {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 2.6rem;
  line-height: 1;
}
.score-ring .big-label {
  font-size: 11px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .08em;
}

.result-hero h2 {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 2.2rem;
  letter-spacing: .04em;
  margin-bottom: 8px;
}
.result-hero p { color: var(--muted); font-size: 14px; }

.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin: 28px 0 0;
}
.stat-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 10px;
  text-align: center;
}
.stat-box .val {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 1.7rem;
}
.stat-box .val.correct-val { color: var(--green); }
.stat-box .val.wrong-val { color: var(--red); }
.stat-box .val.skipped-val { color: var(--muted); }
.stat-box .val.pts-val { color: var(--accent); }

.stat-box .key {
  font-size: 11px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: .06em;
  margin-top: 3px;
}

.section-header {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 1.1rem;
  color: var(--muted);
  letter-spacing: .12em;
  padding: 4px 0 10px;
  text-align: center;
}

.review-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 24px;
}
.review-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 18px;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  align-items: start;
}
.review-icon { font-size: 18px; padding-top: 2px; }
.review-q {
  font-size: .88rem;
  font-weight: 600;
  margin-bottom: 5px;
  color: var(--text);
}
.review-a {
  font-size: .82rem;
  color: var(--muted);
  line-height: 1.6;
}
.review-a .correct-ans { color: var(--green); }
.review-a .wrong-ans { color: var(--red); }

.action-row {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 24px;
}

/* ──────────────────────────────────────────────────────────────
   10. TIMEOUT OVERLAY
   ────────────────────────────────────────────────────────────── */
#timeout-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--overlay-bg);
  backdrop-filter: blur(6px);
  z-index: 999;
  align-items: center;
  justify-content: center;
}
#timeout-overlay.show { display: flex; }

.timeout-box {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 48px 40px;
  text-align: center;
  max-width: 380px;
  width: 90%;
}
.timeout-box .icon { font-size: 3.5rem; margin-bottom: 16px; }
.timeout-box h2 {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 2.4rem;
  letter-spacing: .04em;
  color: var(--red);
  margin-bottom: 10px;
}
.timeout-box p {
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 28px;
}

/* ──────────────────────────────────────────────────────────────
   11. INFO SECTIONS (About, FAQ, Contact, Privacy, Terms)
   ────────────────────────────────────────────────────────────── */
.info-section {
  width: 100%;
  max-width: 780px;
  margin-top: 16px;
}
.info-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  transition: border-color .2s;
}
.info-card:hover { border-color: var(--accent); }
.info-card[open] { border-color: var(--accent-soft-br); }

.info-summary {
  list-style: none;
  cursor: pointer;
  padding: 18px 28px;
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: 'Bebas Neue', sans-serif;
  font-size: 1.25rem;
  letter-spacing: .05em;
  color: var(--accent);
  user-select: none;
  transition: background .2s;
}
.info-summary::-webkit-details-marker { display: none; }
.info-summary:hover { background: var(--accent-soft); }

.info-summary-icon { font-size: 1.2rem; flex-shrink: 0; }
.info-summary-text { flex: 1; }
.info-summary-chevron {
  font-size: 1.1rem;
  color: var(--muted);
  transition: transform .3s ease, color .2s;
  flex-shrink: 0;
}
.info-card[open] .info-summary-chevron {
  transform: rotate(180deg);
  color: var(--accent);
}

.info-content {
  padding: 4px 32px 28px;
  animation: aboutSlide .3s ease;
}
@keyframes aboutSlide {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

.info-subtitle {
  font-family: 'DM Sans', sans-serif;
  font-size: .95rem;
  font-weight: 700;
  color: var(--text);
  margin: 20px 0 8px;
  letter-spacing: .01em;
}
.info-content p {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 12px;
}
.info-content p strong { color: var(--text); font-weight: 600; }
.info-content a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}
.info-content a:hover { text-decoration: underline; }

.info-list {
  list-style: none;
  padding: 0;
  margin: 6px 0 12px;
}
.info-list li {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
  padding-left: 22px;
  position: relative;
}
.info-list li::before {
  content: '▸';
  position: absolute;
  left: 4px;
  color: var(--accent);
  font-weight: 700;
}
.info-list li strong { color: var(--text); }

.info-source {
  font-size: 12px !important;
  font-style: italic;
  margin-top: 16px !important;
  padding-top: 14px;
  border-top: 1px solid var(--border);
  text-align: center;
}

.contact-email {
  text-align: center;
  margin: 18px 0 !important;
  font-size: 1rem !important;
}
.contact-email a {
  display: inline-block;
  padding: 10px 22px;
  background: var(--accent-soft);
  border: 1px solid var(--accent-soft-br);
  border-radius: 99px;
  color: var(--accent) !important;
  font-weight: 600;
  font-family: 'DM Mono', monospace;
  font-size: .9rem;
  transition: background .2s, transform .15s;
}
.contact-email a:hover {
  background: var(--accent);
  color: #fff !important;
  transform: translateY(-2px);
  text-decoration: none !important;
}

/* ──────────────────────────────────────────────────────────────
   12. SUPPORT SECTION
   ────────────────────────────────────────────────────────────── */
.support-section {
  width: 100%;
  max-width: 780px;
  margin-top: 24px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px 32px;
  text-align: center;
}
.support-title {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 1.5rem;
  letter-spacing: .05em;
  color: var(--accent);
  margin-bottom: 8px;
}
.support-text {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
  margin-bottom: 18px;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}
.support-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}
.btn-paypal {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: #0070ba;
  color: #fff;
  font-family: 'DM Sans', sans-serif;
  font-size: .9rem;
  font-weight: 700;
  padding: 12px 22px;
  border-radius: 9px;
  text-decoration: none;
  transition: background .2s, transform .15s, box-shadow .2s;
  box-shadow: 0 3px 10px rgba(0, 112, 186, .25);
}
.btn-paypal:hover {
  background: #005a9a;
  transform: translateY(-2px);
  box-shadow: 0 5px 14px rgba(0, 112, 186, .35);
}
.btn-paypal svg { flex-shrink: 0; }

.support-handle {
  font-family: 'DM Mono', monospace;
  font-size: 13px;
  color: var(--muted);
  padding: 8px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 99px;
}

/* ──────────────────────────────────────────────────────────────
   13. FOOTER
   ────────────────────────────────────────────────────────────── */
.page-footer {
  width: 100%;
  max-width: 780px;
  text-align: center;
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}
.footer-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}
.footer-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 12px;
  font-weight: 500;
  transition: color .2s;
}
.footer-links a:hover { color: var(--accent); }
.footer-sep { color: var(--border); font-size: 12px; }
.page-footer p {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 2px;
}
.footer-brand { color: var(--accent); font-weight: 600; }
.footer-tagline { font-style: italic; }
.footer-version {
  font-family: 'DM Mono', monospace;
  font-size: 10px !important;
  opacity: .6;
  margin-top: 8px !important;
}

/* ──────────────────────────────────────────────────────────────
   14. RESPONSIVE — TABLET & MOBILE
   ────────────────────────────────────────────────────────────── */
@media (max-width: 640px) {
  body { padding: 16px 12px 40px; }
  header { margin-bottom: 20px; gap: 8px; }
  .hero-logo { width: 150px; height: 150px; }
  h1 { font-size: 2rem; }
  .subtitle { font-size: 12px; padding: 0 8px; }

  #theme-toggle {
    top: 14px;
    right: 14px;
    width: 40px;
    height: 40px;
    font-size: 16px;
  }

  #screen-start { padding: 26px 20px; }
  #screen-start h2 { font-size: 1.6rem; }
  #screen-start p { font-size: 13px; }

  /* Info stats: 2x2 on mobile */
  .info-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    margin: 20px 0;
  }
  .info-box { padding: 14px 8px; }
  .info-box .num { font-size: 1.7rem; }
  .info-box .lbl { font-size: 10px; }

  /* Exam cards: stack vertically */
  .exam-selector {
    grid-template-columns: 1fr;
    gap: 10px;
    margin: 20px 0;
  }
  .exam-card {
    padding: 16px 14px;
    display: flex;
    align-items: center;
    gap: 14px;
    text-align: left;
  }
  .exam-card .exam-num {
    font-size: 2rem;
    min-width: 50px;
  }
  .exam-card .exam-label { margin-top: 0; font-size: 12px; }
  .exam-card .exam-desc { margin-top: 2px; font-size: 11px; }
  .exam-card > div:nth-child(2) { flex: 1; }

  /* Timer bar */
  #timer-bar {
    padding: 10px 14px;
    gap: 10px;
    top: 8px;
    flex-wrap: wrap;
  }
  #time-display { font-size: 1.3rem; min-width: 60px; }
  .progress-wrap { order: 3; width: 100%; flex-basis: 100%; }
  #q-counter { font-size: 10px; }

  /* Questions */
  .question-card { padding: 20px 18px 18px; }
  .q-text { font-size: .98rem; }
  .option-btn {
    padding: 11px 12px;
    font-size: .88rem;
    gap: 10px;
  }
  .option-btn:hover:not(:disabled) { transform: none; }
  .feedback-box { font-size: .82rem; padding: 11px 13px; }

  /* Nav buttons */
  .btn-next, .btn-prev { padding: 10px 16px; font-size: .85rem; }
  .btn-primary {
    padding: 13px 24px;
    font-size: .9rem;
    width: 100%;
  }

  /* Result */
  .result-hero { padding: 28px 20px; }
  .score-ring { width: 110px; height: 110px; border-width: 4px; }
  .score-ring .big-num { font-size: 2rem; }
  .result-hero h2 { font-size: 1.7rem; }
  .result-hero p { font-size: 13px; }
  .stats-row { grid-template-columns: repeat(2, 1fr); gap: 8px; }
  .stat-box { padding: 12px 8px; }
  .stat-box .val { font-size: 1.4rem; }
  .stat-box .key { font-size: 10px; }

  .review-item { padding: 13px 14px; gap: 10px; }
  .review-q { font-size: .84rem; }
  .review-a { font-size: .78rem; }

  /* Timeout box */
  .timeout-box { padding: 36px 24px; }
  .timeout-box h2 { font-size: 2rem; }
  .timeout-box p { font-size: 13px; }

  /* Info sections */
  .info-summary {
    padding: 16px 20px;
    font-size: 1.1rem;
    gap: 10px;
  }
  .info-content { padding: 4px 20px 22px; }
  .info-subtitle { font-size: .9rem; margin: 18px 0 8px; }
  .info-content p, .info-list li { font-size: 13px; }

  /* Support */
  .support-section { padding: 22px 20px; }
  .support-buttons { flex-direction: column; gap: 10px; }
  .btn-paypal { width: 100%; justify-content: center; }

  /* Footer */
  .page-footer p { font-size: 11px; }
}

/* Extra-small screens */
@media (max-width: 380px) {
  .hero-logo { width: 130px; height: 130px; }
  h1 { font-size: 1.75rem; }
  .info-box .num { font-size: 1.5rem; }
  .exam-card .exam-num { font-size: 1.7rem; min-width: 42px; }
  .q-text { font-size: .92rem; }
  .option-btn { font-size: .84rem; padding: 10px; }
}