/* =========================================================
   Ground School Quiz – Instrument Panel Theme
   "The Pilot's Modern-Retro Logbook"
   ========================================================= */

:root {
  --bg:          #0c0e14;
  --surface:     #13161f;
  --surface2:    #1a1e2c;
  --border:      #2d3347;
  --text:        #d4dce8;
  --muted:       #7a8499;
  --accent:      #f0a030;
  --accent-dark: #c07820;
  --green:       #3ecf72;
  --red:         #e85555;
  --yellow:      #f0b429;
  --radius:      8px;
  --shadow:      0 0 0 1px var(--border), 0 4px 24px rgba(0,0,0,0.5);
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ---- Header ---- */

header {
  border-top: 2px solid var(--accent);
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.header-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 0.75rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.site-title {
  font-family: 'Oswald', sans-serif;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--accent);
  text-decoration: none;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  text-shadow: 0 0 12px rgba(240,160,48,0.25);
}

.site-title:hover { text-shadow: 0 0 18px rgba(240,160,48,0.5); }

.site-subtitle {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.75rem;
  color: var(--muted);
  letter-spacing: 0.15em;
}

/* ---- Layout ---- */

main {
  flex: 1;
  padding: 2rem 1rem;
  max-width: 760px;
  margin: 0 auto;
  width: 100%;
}

footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 2rem;
  color: var(--muted);
  font-size: 0.78rem;
  border-top: 1px solid var(--border);
}

.insert-coin {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  animation: blink 2.4s step-end infinite;
}

@keyframes blink {
  0%, 100% { opacity: 0.35; }
  50%       { opacity: 0.08; }
}

/* ---- Cards ---- */

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-top: 2px solid var(--accent);
  border-radius: var(--radius);
  padding: 2rem;
  box-shadow: var(--shadow);
}

.center-card {
  max-width: 560px;
  margin: 0 auto;
}

/* ---- Typography ---- */

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

h1 {
  font-family: 'Oswald', sans-serif;
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

h2 {
  font-family: 'Oswald', sans-serif;
  font-size: 1.2rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

h3 {
  font-family: 'Oswald', sans-serif;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 0.4rem;
  color: var(--accent);
}

/* ---- Buttons ---- */

.btn {
  display: inline-block;
  padding: 0.6rem 1.6rem;
  border-radius: 6px;
  font-family: 'Oswald', sans-serif;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  cursor: pointer;
  text-decoration: none;
  border: none;
  transition: background 0.15s, box-shadow 0.15s, transform 0.08s;
}

.btn-primary {
  background: var(--accent);
  color: #0c0e14;
}

.btn-primary:hover {
  background: var(--accent-dark);
  box-shadow: 0 0 14px rgba(240,160,48,0.35);
}

.btn-primary:active { transform: scale(0.97); }

/* ---- Landing page ---- */

.terminal-header {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  color: var(--muted);
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}

.terminal-header .loaded { color: var(--accent); }

.field { display: flex; flex-direction: column; gap: 0.35rem; min-width: 0; }

.field label {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

select, input {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  padding: 0.55rem 0.75rem;
  font-family: 'Inter', sans-serif;
  font-size: 0.95rem;
  width: 100%;
  min-width: 0;
}

select:focus, input:focus {
  outline: 2px solid var(--accent);
  border-color: transparent;
}

/* ---- Mode grid (index page) ---- */

.index-header {
  max-width: 900px;
  margin: 0 auto 1.5rem;
}

.mode-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  max-width: 900px;
  margin: 0 auto;
}

.mode-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-top: 2px solid var(--accent);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.mode-card-test  { border-top-color: var(--yellow); }
.mode-card-endless { border-top-color: var(--green); }

.mode-card-header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}

.mode-icon {
  font-size: 1.1rem;
  color: var(--accent);
  font-family: 'Share Tech Mono', monospace;
  line-height: 1;
}

.mode-card-test  .mode-icon { color: var(--yellow); }
.mode-card-endless .mode-icon { color: var(--green); }

.mode-name {
  font-family: 'Oswald', sans-serif;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text);
}

.mode-stat {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  color: var(--muted);
  margin-left: auto;
  white-space: nowrap;
}

.mode-desc {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  flex: 1;
}

.mode-desc li {
  display: flex;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.45;
}

.mode-desc li::before {
  content: "→";
  color: var(--accent);
  flex-shrink: 0;
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.8rem;
  margin-top: 0.05em;
}

.mode-card-test  .mode-desc li::before { color: var(--yellow); }
.mode-card-endless .mode-desc li::before { color: var(--green); }

.mode-form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: auto;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.6rem;
}

.field-narrow { min-width: 80px; max-width: 90px; }

.btn-full { width: 100%; text-align: center; }

/* ---- Quiz header / progress ---- */

.quiz-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

/* Timer (test mode) */

.timer-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.1rem;
  flex-shrink: 0;
}

.timer-label {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.58rem;
  letter-spacing: 0.12em;
  color: var(--muted);
  text-transform: uppercase;
}

.timer {
  font-family: 'Share Tech Mono', monospace;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.05em;
  transition: color 0.3s;
}

.timer-urgent { color: var(--red); animation: pulse-red 1s step-end infinite; }

@keyframes pulse-red {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.55; }
}

/* Running score (endless mode) */

.running-score {
  display: flex;
  align-items: baseline;
  gap: 0.25rem;
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.95rem;
  flex-shrink: 0;
}

.score-correct { color: var(--green); font-weight: 700; }
.score-sep     { color: var(--muted); }
.score-answered { color: var(--text); }
.score-label   { font-size: 0.65rem; color: var(--muted); letter-spacing: 0.08em; margin-left: 0.2rem; }

.btn-end-endless {
  padding: 0.3rem 0.85rem;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  border-radius: 4px;
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--border);
  margin-left: auto;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}
.btn-end-endless:hover {
  color: var(--red);
  border-color: var(--red);
  background: rgba(232, 85, 85, 0.08);
}

.progress-bar {
  flex: 1;
  height: 8px;
  background: var(--surface2);
  border-radius: 4px;
  overflow: hidden;
  position: relative;
}

/* Tick marks every 10% */
.progress-bar::after {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    to right,
    transparent 0,
    transparent calc(10% - 1px),
    rgba(0,0,0,0.3) calc(10% - 1px),
    rgba(0,0,0,0.3) 10%
  );
  pointer-events: none;
  border-radius: 4px;
}

.progress-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 4px;
  transition: width 0.3s ease;
  box-shadow: 0 0 8px rgba(240,160,48,0.45);
}

.question-counter {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.9rem;
  color: var(--accent);
  white-space: nowrap;
  letter-spacing: 0.04em;
}

/* ---- Question card ---- */

.question-card {
  position: relative;
  transition: border-top-color 0.35s;
}

.question-card[data-state="correct"] { border-top-color: var(--green); }
.question-card[data-state="wrong"]   { border-top-color: var(--red); }

.question-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
}

.acs-badge {
  display: inline-flex;
  align-items: center;
  font-size: 0.72rem;
  font-family: 'Share Tech Mono', monospace;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 0 4px 4px 0;
  padding: 0.15rem 0.5rem;
  color: var(--muted);
  letter-spacing: 0.05em;
}

.mode-badge {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  padding: 0.15rem 0.45rem;
  border-radius: 3px;
  text-transform: uppercase;
}

.mode-badge-test {
  background: rgba(240,180,41,0.1);
  color: var(--yellow);
  border: 1px solid rgba(240,180,41,0.25);
}

.mode-badge-endless {
  background: rgba(62,207,114,0.08);
  color: var(--green);
  border: 1px solid rgba(62,207,114,0.2);
}

.question-image {
  margin: 0.75rem 0;
  text-align: center;
}

.question-image img {
  max-width: 100%;
  border-radius: 6px;
  border: 1px solid var(--border);
}

.question-text {
  font-size: 1.05rem;
  margin-bottom: 1.5rem;
  line-height: 1.65;
  font-weight: 500;
}

/* ---- Choices ---- */

.choices {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  margin-bottom: 1rem;
}

.choice-btn {
  width: 100%;
  display: flex;
  align-items: stretch;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0;
  color: var(--text);
  font-size: 0.95rem;
  font-family: 'Inter', sans-serif;
  cursor: pointer;
  text-align: left;
  overflow: hidden;
  transition: border-color 0.12s, background 0.12s, transform 0.08s;
}

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

.choice-btn:hover:not(:disabled) .choice-label {
  background: rgba(240,160,48,0.15);
  color: var(--accent);
}

.choice-btn:active:not(:disabled) { transform: scale(0.988); }

.choice-label {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 2.75rem;
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--accent);
  background: rgba(240,160,48,0.06);
  border-right: 1px solid var(--border);
  padding: 0.8rem 0;
  transition: background 0.12s, color 0.12s;
}

.choice-text {
  padding: 0.8rem 1rem;
  flex: 1;
  line-height: 1.5;
}

.choice-btn.correct {
  border-color: var(--green);
  background: rgba(62,207,114,0.05);
}

.choice-btn.correct .choice-label {
  background: rgba(62,207,114,0.2);
  color: var(--green);
  border-right-color: rgba(62,207,114,0.3);
}

.choice-btn.wrong {
  border-color: var(--red);
  background: rgba(232,85,85,0.05);
}

.choice-btn.wrong .choice-label {
  background: rgba(232,85,85,0.2);
  color: var(--red);
  border-right-color: rgba(232,85,85,0.3);
}

.choice-btn:disabled { cursor: default; }

/* ---- Feedback ---- */

.feedback {
  padding: 0.6rem 1rem;
  border-radius: 6px;
  font-weight: 600;
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.88rem;
  letter-spacing: 0.03em;
  margin-top: 0.75rem;
}

.correct-msg {
  background: rgba(62,207,114,0.1);
  color: var(--green);
  border: 1px solid rgba(62,207,114,0.25);
}

.wrong-msg {
  background: rgba(232,85,85,0.08);
  color: var(--red);
  border: 1px solid rgba(232,85,85,0.2);
}

/* ---- Explanation box ---- */

.explanation {
  margin-top: 1rem;
  padding: 1rem 1.25rem;
  background: rgba(240,160,48,0.04);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 0.92rem;
  line-height: 1.65;
}

.explanation strong {
  display: block;
  margin-bottom: 0.4rem;
  color: var(--accent);
  font-family: 'Oswald', sans-serif;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.source-ref {
  display: block;
  margin-top: 0.6rem;
  font-size: 0.8rem;
  color: var(--muted);
  font-family: 'Share Tech Mono', monospace;
  font-style: normal;
}

.source-ref a { color: var(--accent); text-decoration: none; }
.source-ref a:hover { text-decoration: underline; }

/* ---- Nav row ---- */

.nav-row {
  margin-top: 1.5rem;
  display: flex;
  justify-content: flex-end;
}

/* ---- Summary ---- */

.summary-card { text-align: center; }

.score-ring-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: 1.5rem auto;
}

.score-ring {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: conic-gradient(var(--ring-color, var(--muted)) var(--pct, 0%), var(--surface2) var(--pct, 0%));
}

.score-ring.pass { --ring-color: var(--green); }
.score-ring.fail { --ring-color: var(--red); }

.score-ring-face {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 128px;
  height: 128px;
  border-radius: 50%;
  background: var(--surface);
}

.score-num {
  font-family: 'Oswald', sans-serif;
  font-size: 2.4rem;
  font-weight: 700;
  line-height: 1;
}

.score-ring.pass .score-num { color: var(--green); }
.score-ring.fail .score-num { color: var(--red); }

.score-fraction {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.76rem;
  color: var(--muted);
  margin-top: 0.25rem;
  letter-spacing: 0.04em;
}

.score-status {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  margin-top: 0.75rem;
}

.score-status .status-label { color: var(--muted); }
.score-status .status-value { color: var(--accent); }

.result-msg {
  font-family: 'Oswald', sans-serif;
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}

.pass-msg { color: var(--green); }
.fail-msg { color: var(--red); }

.missed-section { text-align: left; margin-top: 1rem; }

.missed-section h2 { color: var(--muted); margin-bottom: 1rem; }
.missed-section h2::before { content: "// "; color: var(--red); }

.missed-list { list-style: none; display: flex; flex-direction: column; gap: 1rem; }

.missed-item {
  background: var(--surface2);
  border: 1px solid var(--border);
  border-top: 2px solid var(--red);
  border-radius: var(--radius);
  padding: 1rem;
}

.missed-q {
  margin-bottom: 0.5rem;
  font-size: 0.95rem;
  line-height: 1.55;
}

.missed-meta {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  margin-bottom: 0.4rem;
  flex-wrap: wrap;
}

.missed-explain { margin-top: 0.5rem; }

.missed-explain summary {
  cursor: pointer;
  color: var(--accent);
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  padding: 0.3rem 0;
  user-select: none;
  list-style: none;
}

.missed-explain summary::-webkit-details-marker { display: none; }
.missed-explain summary::before { content: "▶ "; font-size: 0.6em; }
details[open] .missed-explain summary::before { content: "▼ "; }
.missed-explain summary:hover { text-decoration: underline; }

.missed-explain p {
  margin-top: 0.5rem;
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.6;
}

.summary-actions { margin-top: 2rem; }

/* ---- Header nav ---- */

.header-nav {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin-left: auto;
  margin-right: 1rem;
}

.header-nav-link {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.15s;
  padding: 0.2rem 0;
}

.header-nav-link:hover { color: var(--text); }
.header-nav-link.active { color: var(--accent); }

/* ---- Welcome modal ---- */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(12, 14, 20, 0.88);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 1rem;
}

.modal-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-top: 2px solid var(--accent);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  max-width: 480px;
  width: 100%;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.modal-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.modal-logo {
  font-family: 'Share Tech Mono', monospace;
  font-size: 1.8rem;
  color: var(--accent);
  text-shadow: 0 0 14px rgba(240,160,48,0.35);
  flex-shrink: 0;
}

.modal-header h2 {
  margin: 0;
  font-size: 1.1rem;
}

.modal-tagline {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--muted);
  text-transform: uppercase;
  margin-top: 0.2rem;
}

.modal-body {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.modal-body p {
  font-size: 0.92rem;
  color: var(--muted);
  line-height: 1.6;
}

.modal-modes {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  padding: 0.75rem 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.modal-mode-row {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.5;
}

.modal-mode-row strong { color: var(--text); }

.modal-mode-icon {
  font-family: 'Share Tech Mono', monospace;
  font-size: 1rem;
  flex-shrink: 0;
  width: 1.2rem;
  text-align: center;
  margin-top: 0.1em;
}

.modal-tip {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  color: var(--muted);
  border-left: 2px solid var(--border);
  padding-left: 0.75rem;
}

.modal-tip strong { color: var(--text); }

/* ---- About page ---- */

.about-card {
  max-width: 680px;
  margin: 0 auto;
}

.about-card p {
  font-size: 0.95rem;
  color: var(--muted);
  line-height: 1.7;
  margin-bottom: 0.75rem;
}

.about-sources,
.about-modes {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  margin-top: 0.5rem;
}

.about-sources li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.5;
}

.src-label {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 0 3px 3px 0;
  padding: 0.15rem 0.5rem;
  white-space: nowrap;
  flex-shrink: 0;
  color: var(--muted);
  margin-top: 0.1em;
}

.about-modes li {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.5;
}

.about-mode-icon {
  font-family: 'Share Tech Mono', monospace;
  font-size: 1rem;
  flex-shrink: 0;
  width: 1.2rem;
  text-align: center;
  margin-top: 0.1em;
}

.about-modes li strong { color: var(--text); }

.updates-header {
  max-width: 680px;
  margin: 2rem auto 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}

.updates-header .terminal-header {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.76rem;
  letter-spacing: 0.12em;
  color: var(--muted);
  text-transform: uppercase;
}

.posts-list {
  max-width: 680px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.post-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 1.5rem;
}

.post-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}

.post-date {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.post-title {
  font-family: 'Oswald', sans-serif;
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: none;
  color: var(--text);
  margin-bottom: 0.85rem;
}

.post-body p {
  font-size: 0.92rem;
  color: var(--muted);
  line-height: 1.75;
  margin-bottom: 0.65rem;
}

.post-body p:last-child { margin-bottom: 0; }

/* ---- Utilities ---- */

.hidden { display: none !important; }

/* ---- Responsive ---- */

/* Allow index mode-grid to exceed the default main width */
main {
  max-width: 900px;
}

/* Quiz/summary pages use a narrower content width */
.quiz-header,
.question-card,
.summary-card {
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

@media (max-width: 800px) {
  .mode-grid {
    grid-template-columns: 1fr;
    max-width: 520px;
  }
}

@media (max-width: 480px) {
  .header-inner { padding: 0.75rem 1rem; }
  .site-subtitle { display: none; }
  footer { padding: 0.75rem 1rem; flex-direction: column; gap: 0.4rem; text-align: center; }
  main { padding: 1.25rem 0.75rem; }
  .card { padding: 1.5rem 1.25rem; }
  .btn { width: 100%; text-align: center; }
  .score-ring { width: 140px; height: 140px; }
  .score-ring-face { width: 110px; height: 110px; }
  .score-num { font-size: 2rem; }
  .form-row { grid-template-columns: 1fr; }
  .field-narrow { max-width: 100%; }
}