/*
  Quiz app — styles.css
  ─────────────────────
  Same design tokens as every other RBDG app.
  App-specific additions are at the bottom:
    • .intro-card / .result-card  — hero sections
    • .question-text              — large, readable question display
    • .answer-btn                 — selectable options with correct/wrong states
*/
:root {
  --bg-primary:   #000000;
  --bg-secondary: #0a0a0f;
  --bg-tertiary:  #14141f;
  --bg-card:      #1a1a2e;

  --text-primary:   #ffffff;
  --text-secondary: #a0a0b0;

  --accent-primary: #00d4ff;
  --focus-ring:     #00d4ff;
  --focus-glow:     rgba(0, 212, 255, 0.4);

  --correct:        #00ff88;
  --correct-bg:     rgba(0, 255, 136, 0.15);
  --wrong:          #ff4466;
  --wrong-bg:       rgba(255, 68, 102, 0.15);

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  width: 600px;
  height: 600px;
  overflow: hidden;
}

#app { width: 100%; height: 100%; position: relative; }

/* ── Screens ──────────────────────────────────────────────────────────── */
.screen {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  position: absolute;
  top: 0; left: 0;
}
.screen.hidden { display: none; }

/* ── Header ───────────────────────────────────────────────────────────── */
.header {
  display: flex;
  align-items: center;
  padding: 16px 20px;
  background: var(--bg-secondary);
  gap: 12px;
  flex-shrink: 0;
}
.header h1 { font-size: 22px; font-weight: 600; flex: 1; }

.back-btn {
  background: transparent;
  color: var(--text-primary);
  font-size: 22px;
  padding: 8px 12px;
  border-radius: 8px;
  border: 2px solid transparent;
  text-decoration: none;
}

/* ── Content ──────────────────────────────────────────────────────────── */
.content {
  flex: 1;
  padding: 16px 20px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* ── Focus ────────────────────────────────────────────────────────────── */
.focusable {
  border: 2px solid transparent;
  transition: border-color 0.15s ease, box-shadow 0.15s ease,
              background 0.15s ease;
  cursor: pointer;
}
.focusable:focus {
  outline: none;
  border-color: var(--focus-ring);
  box-shadow: 0 0 20px var(--focus-glow);
}

/* ── Buttons ──────────────────────────────────────────────────────────── */
.btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 14px 16px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  gap: 8px;
}
.btn:focus { background: var(--bg-card); }

.btn-primary {
  background: var(--accent-primary);
  color: #0a0a0f; /* dark text on bright button */
  font-weight: 700;
}
.btn-primary:focus { background: #33ddff; border-color: #33ddff; }

/* ── Intro card (start screen) ────────────────────────────────────────── */
.intro-card {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: 32px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  border: 1px solid #1e1e30;
  flex: 1; /* fill available space so the button sits at the bottom */
  justify-content: center;
}
.intro-emoji { font-size: 52px; line-height: 1; }
.intro-title { font-size: 20px; font-weight: 700; color: var(--accent-primary); }
.intro-sub   { font-size: 14px; color: var(--text-secondary); text-align: center; }

/* ── Question text ────────────────────────────────────────────────────── */
/*
  Large, easy to read at arm's length.
  Two lines max for typical questions — overflow wraps naturally.
*/
.question-text {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.4;
  padding: 4px 0;
}

/* ── Answer buttons ───────────────────────────────────────────────────── */
.answers {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.answer-btn {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 14px;
  font-weight: 500;
  text-align: left;
  border: 2px solid transparent;
}
.answer-btn:focus:not(:disabled) {
  background: var(--bg-card);
}

/* Applied by app.js after the user picks an answer */
.answer-btn.correct {
  background: var(--correct-bg);
  border-color: var(--correct);
  color: var(--correct);
}
.answer-btn.wrong {
  background: var(--wrong-bg);
  border-color: var(--wrong);
  color: var(--wrong);
}
.answer-btn:disabled {
  opacity: 0.6;
  cursor: default;
}

/* ── Result card ──────────────────────────────────────────────────────── */
.result-card {
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: 36px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  border: 1px solid #1e1e30;
  flex: 1;
  justify-content: center;
}
.result-emoji { font-size: 52px; line-height: 1; }
.result-score { font-size: 32px; font-weight: 700; color: var(--accent-primary); }
.result-label { font-size: 14px; color: var(--text-secondary); }

/* ── Utility ──────────────────────────────────────────────────────────── */
.hidden { display: none !important; }