/* SOA-C03 practice exam — single-page quiz styles */
:root {
  --bg: #0f1419;
  --card: #1a2129;
  --border: #2d3742;
  --text: #e6e8ea;
  --muted: #8b98a5;
  --accent: #ff9900;      /* AWS orange */
  --correct: #2e9e5b;
  --wrong: #d64545;
  --correct-bg: rgba(46, 158, 91, 0.12);
  --wrong-bg: rgba(214, 69, 69, 0.12);
}

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

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  min-height: 100vh;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 24px;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 5;
}

header h1 { font-size: 1rem; font-weight: 600; color: var(--muted); }

#timer {
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--accent);
}
#timer.low { color: var(--wrong); }

main { max-width: 860px; margin: 0 auto; padding: 32px 20px 80px; }

.hidden { display: none !important; }

/* ----- Home screen ----- */
.home h2 { margin-bottom: 8px; }
.home p.sub { color: var(--muted); margin-bottom: 28px; }

.mode-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  margin-bottom: 16px;
}
.mode-card h3 { margin-bottom: 6px; }
.mode-card p { color: var(--muted); font-size: 0.92rem; margin-bottom: 14px; }

.domain-buttons { display: flex; flex-wrap: wrap; gap: 8px; }

/* ----- Buttons ----- */
button {
  font: inherit;
  cursor: pointer;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  border-radius: 8px;
  padding: 10px 18px;
  transition: border-color 0.15s, background 0.15s;
}
button:hover { border-color: var(--accent); }
button.primary { background: var(--accent); border-color: var(--accent); color: #111; font-weight: 700; }
button.primary:hover { filter: brightness(1.1); }
button:disabled { opacity: 0.45; cursor: not-allowed; }

/* ----- Question screen ----- */
.progress { color: var(--muted); font-size: 0.88rem; margin-bottom: 14px; display: flex; justify-content: space-between; }
.domain-tag {
  display: inline-block;
  font-size: 0.75rem;
  padding: 2px 10px;
  border-radius: 99px;
  border: 1px solid var(--border);
  color: var(--accent);
}

.question-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px;
}
.question-card .stem { font-size: 1.05rem; margin-bottom: 6px; white-space: pre-wrap; }
.question-card .hint { color: var(--muted); font-size: 0.85rem; margin-bottom: 18px; }

.option {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  width: 100%;
  text-align: left;
  padding: 13px 16px;
  margin-bottom: 10px;
  border-radius: 8px;
  background: transparent;
}
.option .letter { font-weight: 700; color: var(--muted); }
.option.selected { border-color: var(--accent); background: rgba(255, 153, 0, 0.08); }
.option.correct { border-color: var(--correct); background: var(--correct-bg); }
.option.wrong { border-color: var(--wrong); background: var(--wrong-bg); }
.option.correct .letter { color: var(--correct); }
.option.wrong .letter { color: var(--wrong); }
.option.locked { pointer-events: none; }

/* ----- Explanation (shown on the spot after answering) ----- */
.explanation {
  margin-top: 18px;
  padding: 16px;
  border-radius: 8px;
  border-left: 4px solid var(--accent);
  background: rgba(255, 153, 0, 0.06);
  font-size: 0.95rem;
}
.explanation .verdict { font-weight: 700; margin-bottom: 6px; }
.explanation .verdict.ok { color: var(--correct); }
.explanation .verdict.bad { color: var(--wrong); }

.actions { margin-top: 20px; display: flex; justify-content: space-between; align-items: center; }

/* ----- Results screen ----- */
.score-big { font-size: 3rem; font-weight: 800; }
.score-big.pass { color: var(--correct); }
.score-big.fail { color: var(--wrong); }
.results table { width: 100%; border-collapse: collapse; margin: 20px 0; }
.results th, .results td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); font-size: 0.92rem; }
.results th { color: var(--muted); font-weight: 600; }

.missed-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
  margin-bottom: 10px;
  font-size: 0.92rem;
}
.missed-item .q { font-weight: 600; margin-bottom: 6px; }
.missed-item .a { color: var(--correct); }
.missed-item .e { color: var(--muted); margin-top: 4px; }