/* ─── Variables ──────────────────────────────────────────────────────────────── */
:root {
  --bg:      #00072B;
  --panel:   #040E3A;
  --panel2:  #020B30;
  --text:    #E8F0FF;
  --muted:   #8FA4CC;
  --accent1: #0097B2;
  --accent2: #00C6E0;
  --accent3: #2B0A5A;
  --success: #22C55E;
  --danger:  #EF4444;
  --warning: #F59E0B;
  --font:    'IBM Plex Sans', sans-serif;
  --radius:  12px;
  --shadow:  0 8px 32px rgba(0, 0, 0, 0.6);
  --card-border: rgba(0, 151, 178, 0.18);
  --glow-sm: 0 0 10px rgba(0, 151, 178, 0.12);
  --glow-md: 0 0 18px rgba(0, 151, 178, 0.20);
}

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

/* ─── Base ───────────────────────────────────────────────────────────────────── */
html { height: 100%; }

body {
  background: linear-gradient(180deg, #00072B 0%, #251552 100%) fixed;
  color: var(--text);
  font-family: var(--font);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

#app {
  flex: 1;
  width: 100%;
  max-width: 760px;
  margin: 0 auto;
  padding: 1.5rem 1rem 6rem;
  position: relative;
  z-index: 1;
}

/* ─── Screen management ──────────────────────────────────────────────────────── */
.screen { display: none; }
.screen.active { display: block; }
.hidden { display: none !important; }

/* ─── Typography ─────────────────────────────────────────────────────────────── */
h1 {
  font-weight: 700;
  text-align: center;
  line-height: 1;
  color: #ffffff;
  margin-bottom: 0.4rem;
}
.title-top {
  display: block;
  font-size: clamp(1.8rem, 5.5vw, 2.5rem);
  letter-spacing: -0.03em;
}
.title-bottom {
  display: block;
  font-size: clamp(1.4rem, 4.5vw, 2rem);
  letter-spacing: -0.02em;
  opacity: 0.85;
  margin-top: -1.3rem;
}

.subtitle {
  text-align: center;
  color: var(--muted);
  font-size: 0.88rem;
  margin-bottom: 2rem;
  letter-spacing: 0.01em;
}

h2 {
  font-size: 1.4rem;
  font-weight: 600;
  text-align: center;
  margin-bottom: 1.5rem;
  letter-spacing: -0.02em;
  color: var(--text);
}

h3 {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--accent1);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 1rem;
}

/* ─── Start Screen ───────────────────────────────────────────────────────────── */
.brand-header {
  padding: 2.5rem 0 0;
  position: relative;
}

.brand-badge {
  display: block;
  width: fit-content;
  margin: 0 auto 1rem;
  background: rgba(0, 151, 178, 0.12);
  border: 1px solid rgba(0, 151, 178, 0.35);
  color: var(--accent2);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  padding: 0.25rem 0.85rem;
  border-radius: 100px;
}

/* Mode picker buttons */
.mode-buttons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.mode-btn {
  background: rgba(4, 14, 58, 0.8);
  border: 1.5px solid rgba(255, 255, 255, 0.07);
  border-radius: var(--radius);
  padding: 1.1rem 1rem;
  cursor: pointer;
  text-align: center;
  color: var(--muted);
  font-family: var(--font);
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  transition: border-color 0.18s, color 0.18s, background 0.18s, box-shadow 0.18s;
}

.mode-btn:hover {
  border-color: rgba(0, 151, 178, 0.4);
  color: var(--text);
  background: rgba(0, 151, 178, 0.05);
}

.mode-btn.active {
  border-color: var(--accent1);
  color: var(--text);
  background: rgba(0, 151, 178, 0.08);
  box-shadow: var(--glow-sm);
}

.mode-btn-title {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  display: block;
}

.mode-btn-sub {
  font-size: 0.74rem;
  display: block;
  color: var(--muted);
}

.mode-btn.active .mode-btn-sub { color: var(--accent2); }

/* Config card */
.config-card {
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.025) 0%, transparent 60%), var(--panel);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255, 255, 255, 0.04);
  padding: 1.25rem 1.5rem;
  margin-bottom: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0;
}

/* Thin gradient divider between Questions and Domains sections */
.config-card > * + * {
  padding-top: 1.1rem;
  border-top: 1px solid rgba(0, 151, 178, 0.1);
}

.config-stack {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.5rem;
  padding-bottom: 1.1rem;
}

.config-row-label {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent1);
  white-space: nowrap;
}

.domain-section {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

#count-select {
  background: var(--panel2);
  color: var(--text);
  border: 1px solid rgba(0, 151, 178, 0.2);
  border-radius: 7px;
  padding: 0.5rem 2.1rem 0.5rem 0.75rem;
  font-size: 0.95rem;
  font-family: var(--font);
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%230097B2' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.7rem center;
  min-width: 90px;
  transition: border-color 0.15s, box-shadow 0.15s;
}

#count-select:focus {
  outline: none;
  border-color: var(--accent1);
  box-shadow: 0 0 0 2px rgba(0, 151, 178, 0.15);
}

/* Domain checkboxes */
.domain-section-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.btn-link {
  background: none;
  border: none;
  color: var(--accent1);
  font-family: var(--font);
  font-size: 0.78rem;
  cursor: pointer;
  padding: 0;
  text-decoration: underline;
  text-underline-offset: 2px;
  letter-spacing: 0.02em;
}
.btn-link:hover { color: var(--accent2); }

.domain-checkboxes {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.domain-check-item {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  cursor: pointer;
  font-size: 0.87rem;
  color: var(--muted);
  user-select: none;
  transition: color 0.12s;
}

.domain-check-item:hover { color: var(--text); }

.domain-check-item input[type="checkbox"] {
  width: 15px;
  height: 15px;
  accent-color: var(--accent1);
  cursor: pointer;
  flex-shrink: 0;
}

.domain-check-item:has(input:checked) { color: var(--text); }

/* ─── Buttons ────────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  background: var(--panel2);
  color: var(--text);
  border: 1px solid rgba(255, 255, 255, 0.09);
  padding: 0.6rem 1.2rem;
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.9rem;
  font-family: var(--font);
  font-weight: 500;
  transition: background 0.15s, border-color 0.15s, box-shadow 0.15s, opacity 0.15s;
  text-decoration: none;
}

.btn:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.16);
}
.btn:focus-visible {
  outline: 2px solid var(--accent1);
  outline-offset: 2px;
}
.btn:disabled { opacity: 0.32; cursor: not-allowed; }

.btn-primary {
  background: linear-gradient(135deg, #0097B2 0%, #00B8D9 100%);
  border: none;
  color: #fff;
  font-weight: 700;
  font-size: 1rem;
  padding: 0.8rem 2rem;
  width: 100%;
  letter-spacing: 0.01em;
  box-shadow: var(--glow-sm);
  border-radius: 9px;
}
.btn-primary:hover:not(:disabled) {
  background: linear-gradient(135deg, #00ABCC 0%, #00CFEF 100%);
  box-shadow: var(--glow-md);
}

.btn-danger {
  background: rgba(239, 68, 68, 0.12);
  border-color: rgba(239, 68, 68, 0.38);
  color: var(--danger);
}
.btn-danger:hover:not(:disabled) { background: rgba(239, 68, 68, 0.22); }

.btn-success {
  background: rgba(34, 197, 94, 0.10);
  border-color: rgba(34, 197, 94, 0.3);
  color: var(--success);
}
.btn-success:hover:not(:disabled) { background: rgba(34, 197, 94, 0.20); }

.btn-ghost {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.07);
}

/* ─── Error message ──────────────────────────────────────────────────────────── */
.error-msg {
  background: rgba(239, 68, 68, 0.10);
  border: 1px solid rgba(239, 68, 68, 0.35);
  color: var(--danger);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
  text-align: center;
}

/* ─── Question Screen ────────────────────────────────────────────────────────── */
#question-screen { padding-top: 1rem; }

.question-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  gap: 0.75rem;
}

.progress-wrap {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  flex: 1;
}

#progress {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.progress-bar-track {
  height: 3px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 100px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent1), var(--accent2));
  border-radius: 100px;
  transition: width 0.35s ease;
  box-shadow: none;
}

#timer {
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent2);
  letter-spacing: 0.04em;
  background: rgba(0, 151, 178, 0.1);
  border: 1px solid rgba(0, 151, 178, 0.28);
  padding: 0.3rem 0.8rem;
  border-radius: 7px;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

#timer.timer-warning {
  color: var(--danger);
  background: rgba(239, 68, 68, 0.1);
  border-color: rgba(239, 68, 68, 0.3);
}

/* ─── Question Card ──────────────────────────────────────────────────────────── */
.card {
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.025) 0%, transparent 50%), var(--panel);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255, 255, 255, 0.04);
  padding: 1.5rem 1.5rem 1.25rem;
  margin-bottom: 1rem;
}

.domain-badge {
  display: inline-block;
  background: rgba(0, 151, 178, 0.12);
  border: 1px solid rgba(0, 151, 178, 0.32);
  color: var(--accent2);
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.2rem 0.65rem;
  border-radius: 100px;
  margin-bottom: 0.9rem;
}

#question-text {
  font-size: 1.05rem;
  font-weight: 400;
  line-height: 1.7;
  color: var(--text);
  margin-bottom: 1.3rem;
  letter-spacing: 0.005em;
}

/* ─── Options ────────────────────────────────────────────────────────────────── */
.options {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.option {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  background: var(--panel2);
  border: 1.5px solid rgba(255, 255, 255, 0.06);
  border-left: 3px solid transparent;
  border-radius: 9px;
  padding: 0.8rem 1rem;
  cursor: pointer;
  text-align: left;
  width: 100%;
  font-family: var(--font);
  font-size: 0.94rem;
  color: var(--text);
  transition: border-color 0.15s, background 0.15s, box-shadow 0.15s;
  line-height: 1.5;
}

.option:hover:not(:disabled) {
  border-color: rgba(0, 151, 178, 0.35);
  border-left-color: rgba(0, 151, 178, 0.5);
  background: rgba(0, 151, 178, 0.05);
}

.option:focus-visible {
  outline: none;
  border-color: var(--accent1);
  box-shadow: 0 0 0 2px rgba(0, 151, 178, 0.18);
}

.option-label {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 27px;
  height: 27px;
  border: 1.5px solid rgba(255, 255, 255, 0.12);
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--muted);
  flex-shrink: 0;
  margin-top: 1px;
  transition: border-color 0.15s, color 0.15s, background 0.15s;
}

.option-text { flex: 1; }

/* Selected state */
.option.selected {
  border-color: rgba(0, 151, 178, 0.3);
  border-left-color: var(--accent1);
  background: rgba(0, 151, 178, 0.07);
}
.option.selected .option-label {
  border-color: var(--accent1);
  color: var(--accent1);
  background: rgba(0, 151, 178, 0.14);
}

/* Correct state */
.option.correct {
  border-color: rgba(34, 197, 94, 0.25);
  border-left-color: var(--success);
  background: rgba(34, 197, 94, 0.06);
}
.option.correct .option-label {
  border-color: var(--success);
  color: var(--success);
  background: rgba(34, 197, 94, 0.14);
}

/* Wrong state */
.option.wrong {
  border-color: rgba(239, 68, 68, 0.22);
  border-left-color: var(--danger);
  background: rgba(239, 68, 68, 0.06);
}
.option.wrong .option-label {
  border-color: var(--danger);
  color: var(--danger);
  background: rgba(239, 68, 68, 0.14);
}

.option:disabled { cursor: default; }

/* ─── Explanation ────────────────────────────────────────────────────────────── */
.explanation {
  margin-top: 1.1rem;
  padding: 0.9rem 1rem;
  background: rgba(0, 198, 224, 0.06);
  border-left: 3px solid var(--accent1);
  border-radius: 0 7px 7px 0;
  font-size: 0.87rem;
  color: var(--muted);
  line-height: 1.68;
}

.explanation strong { color: var(--accent2); }

/* ─── Question Footer ────────────────────────────────────────────────────────── */
.question-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.flag-label {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.84rem;
  color: var(--muted);
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
}

.flag-label input[type="checkbox"] {
  width: 14px;
  height: 14px;
  accent-color: var(--warning);
  cursor: pointer;
}

.flag-label:has(input:checked) { color: var(--warning); }

/* ─── Section card wrapper ───────────────────────────────────────────────────── */
.section-card {
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.02) 0%, transparent 50%), var(--panel);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255, 255, 255, 0.03);
  padding: 1.25rem 1.5rem;
  margin-bottom: 1rem;
}

/* ─── Review Screen ──────────────────────────────────────────────────────────── */
#review-screen { padding-top: 1rem; }

.review-summary-bar {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}

.review-stat {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.82rem;
}

.review-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}
.review-dot.answered  { background: var(--success); }
.review-dot.unanswered { background: var(--muted); }
.review-dot.flagged   { background: var(--warning); }

.review-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 0.6rem;
  margin-bottom: 1.5rem;
}

.review-item {
  background: var(--panel);
  border: 1px solid var(--card-border);
  border-radius: 9px;
  overflow: hidden;
}

.review-item-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid rgba(0, 151, 178, 0.08);
}

.review-num {
  font-size: 0.73rem;
  font-weight: 700;
  color: var(--muted);
  min-width: 24px;
}

.review-status-badge {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  padding: 0.1rem 0.5rem;
  border-radius: 100px;
}

.review-status-badge.answered  { background: rgba(34,197,94,0.14);  color: var(--success); }
.review-status-badge.unanswered { background: rgba(143,164,204,0.1); color: var(--muted); }
.review-status-badge.flagged   { background: rgba(245,158,11,0.14);  color: var(--warning); }

.review-link {
  display: block;
  width: 100%;
  padding: 0.5rem 0.75rem;
  background: transparent;
  border: none;
  color: var(--muted);
  font-family: var(--font);
  font-size: 0.81rem;
  text-align: left;
  cursor: pointer;
  line-height: 1.45;
  transition: color 0.15s;
}
.review-link:hover { color: var(--text); }

.review-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

/* ─── Results Screen ─────────────────────────────────────────────────────────── */
#results-screen { padding-top: 1rem; }

.score-hero {
  text-align: center;
  margin-bottom: 1.75rem;
}

.score-ring {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 136px;
  height: 136px;
  border-radius: 50%;
  border: 4px solid;
  margin-bottom: 0.75rem;
  position: relative;
}
.score-ring::after {
  content: '';
  position: absolute;
  inset: -8px;
  border-radius: 50%;
  border: 1px solid;
  opacity: 0.2;
}
.score-ring.pass { border-color: var(--success); }
.score-ring.pass::after { border-color: var(--success); }
.score-ring.fail { border-color: var(--danger); }
.score-ring.fail::after { border-color: var(--danger); }

.score-pct {
  font-size: 2.1rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
}
.score-ring.pass .score-pct { color: var(--success); }
.score-ring.fail .score-pct { color: var(--danger); }

.score-verdict {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  min-height: 1em;
}
.score-ring.pass .score-verdict { color: var(--success); }

.score-stats {
  display: flex;
  justify-content: center;
  gap: 2.25rem;
  flex-wrap: wrap;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.15rem;
}

.stat-val {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
}

.stat-label {
  font-size: 0.7rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

/* Domain breakdown */
.domain-breakdown {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.domain-row {
  display: grid;
  grid-template-columns: 1fr 2fr auto;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.85rem;
}

.domain-name {
  color: var(--muted);
  font-size: 0.79rem;
  line-height: 1.3;
}

.domain-bar-wrap {
  height: 5px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 100px;
  overflow: hidden;
}

.domain-bar {
  height: 100%;
  border-radius: 100px;
  background: linear-gradient(90deg, var(--accent1), var(--accent2));
  transition: width 0.7s ease;
  box-shadow: none;
}

.domain-pct {
  font-weight: 600;
  font-size: 0.8rem;
  color: var(--text);
  min-width: 36px;
  text-align: right;
}

/* Incorrect questions */
.incorrect-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.incorrect-item {
  background: var(--panel2);
  border: 1px solid rgba(239, 68, 68, 0.18);
  border-left: 3px solid rgba(239, 68, 68, 0.5);
  border-radius: 9px;
  padding: 1rem;
  font-size: 0.87rem;
  line-height: 1.6;
}

.incorrect-q {
  font-weight: 500;
  color: var(--text);
  margin-bottom: 0.5rem;
}

.incorrect-your {
  color: var(--danger);
  font-size: 0.82rem;
  margin-bottom: 0.2rem;
}

.incorrect-correct {
  color: var(--success);
  font-size: 0.82rem;
  margin-bottom: 0.5rem;
}

.incorrect-exp {
  color: var(--muted);
  font-size: 0.81rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 0.5rem;
  margin-top: 0.2rem;
}

.not-answered-item {
  background: var(--panel2);
  border: 1px solid rgba(143, 164, 204, 0.12);
  border-left: 3px solid rgba(143, 164, 204, 0.45);
  border-radius: 9px;
  padding: 1rem;
  font-size: 0.87rem;
  line-height: 1.6;
}

.results-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: 0.5rem;
}

/* ─── Footer ─────────────────────────────────────────────────────────────────── */
.site-footer {
  text-align: center;
  padding: 1.5rem 1.5rem 1.25rem;
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.55rem;
}

.footer-brand {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.45rem;
  font-size: 0.75rem;
  color: var(--muted);
  margin-bottom: 0.2rem;
}

.footer-icon {
  width: 20px;
  height: 20px;
  object-fit: contain;
  border-radius: 4px;
  opacity: 0.85;
  vertical-align: middle;
}

.footer-copy {
  color: var(--muted);
  font-weight: 500;
  letter-spacing: 0.01em;
}

.footer-sep {
  color: rgba(143, 164, 204, 0.3);
  font-size: 0.7rem;
}

.footer-link {
  color: var(--accent1);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.15s;
}
.footer-link:hover { color: var(--accent2); }

.footer-divider {
  width: 100%;
  max-width: 480px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0, 151, 178, 0.2), transparent);
}

.footer-pdfs {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.65rem;
  padding: 1.5rem 0 0.2rem;
}

.footer-pdfs-label {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: #ffffff;
}

.footer-pdf-btns {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
}

.footer-pdf-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.9rem;
  border: 1px solid rgba(0, 151, 178, 0.3);
  border-radius: 6px;
  background: rgba(0, 151, 178, 0.07);
  color: var(--accent1);
  font-size: 0.75rem;
  font-family: var(--font);
  font-weight: 500;
  text-decoration: none;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.footer-pdf-btn::before {
  content: '↓';
  font-size: 0.7rem;
  opacity: 0.7;
}
.footer-pdf-btn:hover {
  background: rgba(0, 151, 178, 0.15);
  border-color: rgba(0, 151, 178, 0.5);
  color: var(--accent2);
}

.footer-issues {
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 1.5rem;
  margin-bottom: 0.1rem;
  text-align: center;
}
.footer-issues-btn {
  color: var(--accent1);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color 0.15s;
}
.footer-issues-btn:hover {
  color: var(--accent2);
}
.footer-disclaimer {
  font-size: 0.68rem;
  color: rgba(143, 164, 204, 0.45);
  line-height: 1.65;
  font-style: italic;
  letter-spacing: 0.01em;
  margin-top: 0.2rem;
}

/* ─── Responsive ─────────────────────────────────────────────────────────────── */
@media (max-width: 520px) {
  #app { padding: 1rem 0.75rem 6rem; }
  .mode-buttons { grid-template-columns: 1fr; }
  .review-grid { grid-template-columns: 1fr; }
  .question-footer { flex-wrap: wrap; }
  .question-footer .btn { flex: 1; }
  .domain-row { grid-template-columns: 1fr auto; gap: 0.35rem; }
  .domain-bar-wrap { display: none; }
  .score-stats { gap: 1.5rem; }
  .results-actions { flex-direction: column; }
  .review-actions { flex-direction: column; }
  .card { padding: 1.3rem 1.1rem; }
  .config-card { padding: 1rem 1.1rem; }
  #question-text { font-size: 1.15rem; }
  .option { font-size: 1.05rem; padding: 0.95rem 1rem; }
  .mode-btn-title { font-size: 1.15rem; }
  .mode-btn-sub { font-size: 0.88rem; }
  .brand-header { padding: 0.5rem 0 0; }
  .title-top { font-size: 2.3rem; }
  .title-bottom { font-size: 1.65rem; }
}