/* Calm, minimal theme — no framework, kept dependency-free for shared hosting. */

:root {
  --bg: #f7f8fa;
  --card-bg: #ffffff;
  --border: #e1e4e8;
  --text: #1f2328;
  --text-muted: #6b7280;
  --primary: #1f5aa8;
  --primary-hover: #174785;
  --success: #1e8e5a;
  --success-bg: #e8f5ee;
  --error: #c0392b;
  --error-bg: #fdecea;
  --radius: 8px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

a { color: var(--primary); }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
}

.brand {
  font-weight: 700;
  font-size: 1.1rem;
  text-decoration: none;
  color: var(--text);
}

.topbar-right { display: flex; align-items: center; gap: 12px; }
.signed-in-as { font-size: 0.9rem; color: var(--text-muted); }

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 24px;
}

h1 { font-size: 1.6rem; margin-bottom: 4px; }
.subtitle { color: var(--text-muted); margin-top: 0; }

.auth-card {
  max-width: 480px;
  margin: 40px auto;
  padding: 32px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.tabs {
  display: flex;
  gap: 4px;
  margin: 20px 0;
  border-bottom: 1px solid var(--border);
}
.tab {
  padding: 8px 16px;
  text-decoration: none;
  color: var(--text-muted);
  border-bottom: 2px solid transparent;
}
.tab-active {
  color: var(--primary);
  border-bottom-color: var(--primary);
  font-weight: 600;
}

.form { display: flex; flex-direction: column; gap: 14px; }
.form-row { display: flex; gap: 14px; }
.form-row label { flex: 1; }

label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
}

input[type="text"], input[type="email"], input[type="password"], select {
  font: inherit;
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-weight: normal;
}
input:focus, select:focus { outline: 2px solid var(--primary); outline-offset: 1px; }

.btn {
  display: inline-block;
  padding: 10px 18px;
  border: none;
  border-radius: 6px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  text-align: center;
  text-decoration: none;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-secondary { background: transparent; color: var(--text); border: 1px solid var(--border); }
.btn-small { padding: 6px 12px; font-size: 0.85rem; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.hint { font-size: 0.85rem; color: var(--text-muted); margin-top: 16px; }

.flash {
  padding: 10px 14px;
  border-radius: 6px;
  margin-bottom: 14px;
  font-size: 0.9rem;
}
.flash-error { background: var(--error-bg); color: var(--error); }
.flash-success { background: var(--success-bg); color: var(--success); }

.footer { max-width: 900px; margin: 0 auto; padding: 0 24px 24px; }
.disclaimer { font-size: 0.8rem; color: var(--text-muted); }

.hint { font-size: 0.85rem; color: var(--text-muted); }
.warning { color: #92400e; background: #fff7ed; padding: 8px 12px; border-radius: 6px; font-size: 0.9rem; }
.btn-block { width: 100%; }

/* Home page */
.resume-banner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 16px; background: #eef4fc; border: 1px solid #c9dcf3;
  border-radius: var(--radius); margin-bottom: 20px;
}
.exam-cards { display: flex; gap: 20px; flex-wrap: wrap; }
.exam-card {
  flex: 1; min-width: 320px; padding: 20px; background: var(--card-bg);
  border: 1px solid var(--border); border-radius: var(--radius);
  display: flex; flex-direction: column; gap: 6px;
}
.exam-card h2 { margin: 0 0 2px; font-size: 1.2rem; }
.exam-card form { margin-top: 10px; }
.fresh-caption { font-size: 0.85rem; color: var(--text-muted); }
.ai-details { margin-top: 10px; }
.ai-details summary { cursor: pointer; font-weight: 600; font-size: 0.9rem; }
.ai-form { margin-top: 12px; }
.history-table { width: 100%; border-collapse: collapse; margin: 12px 0 24px; }
.history-table th, .history-table td {
  text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); font-size: 0.9rem;
}

/* Exam-taking layout */
.exam-layout { display: flex; gap: 24px; align-items: flex-start; }
.palette-sidebar {
  width: 200px; flex-shrink: 0; position: sticky; top: 20px;
  background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px;
}
.palette-sidebar h3 { margin-top: 0; font-size: 1rem; }
.palette-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 6px; margin-bottom: 10px; }
.palette-btn {
  padding: 6px 0; border: 1px solid var(--border); border-radius: 4px; background: #fff;
  cursor: pointer; font-size: 0.85rem;
}
.palette-btn.answered { border-color: var(--success); color: var(--success); }
.palette-btn.flagged { background: #fff7ed; }
.palette-btn.current { background: var(--primary); color: #fff; border-color: var(--primary); }

.question-main { flex: 1; min-width: 0; }
.question-top { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; }
.question-top h2 { margin-bottom: 2px; font-size: 1.2rem; }
.progress-bar { height: 6px; background: var(--border); border-radius: 3px; margin-top: 6px; overflow: hidden; width: 260px; }
.progress-fill { height: 100%; background: var(--primary); }
.timer {
  display: inline-block; padding: 8px 18px; border-radius: 8px; background: rgba(31,90,168,0.08);
  border: 1px solid var(--primary); font-size: 1.3rem; font-weight: 700;
  font-variant-numeric: tabular-nums; color: var(--primary); white-space: nowrap;
}
.timer.danger { border-color: var(--error); color: var(--error); background: var(--error-bg); }

.question-card {
  background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px; margin: 16px 0;
}
.meta { color: var(--text-muted); font-size: 0.9rem; }
.scenario { font-size: 1.05rem; margin: 12px 0; }
fieldset { border: none; padding: 0; margin: 0 0 16px; }
legend { font-weight: 600; margin-bottom: 8px; padding: 0; }
.option {
  display: block; font-weight: normal; flex-direction: row; align-items: center; gap: 8px;
  padding: 8px 10px; border-radius: 6px; cursor: pointer;
}
.option:hover { background: var(--bg); }
.option input { margin-right: 8px; }
.flag-checkbox { flex-direction: row; align-items: center; gap: 8px; font-weight: normal; }
.flag-checkbox input { width: auto; }

.nav-row { display: flex; justify-content: space-between; align-items: center; margin-top: 16px; }
.confirm-actions { display: flex; gap: 12px; margin-top: 20px; }

/* Results page */
.gauge { margin: 14px 0; }
.gauge-track {
  position: relative; height: 24px; background: rgba(128,128,128,0.25); border-radius: 6px; overflow: hidden;
}
.gauge-fill { position: absolute; left: 0; top: 0; bottom: 0; }
.gauge-fill.pass { background: var(--success); }
.gauge-fill.fail { background: var(--error); }
.gauge-pass-line { position: absolute; top: 0; bottom: 0; width: 2px; background: #333; }
.gauge-labels { display: flex; justify-content: space-between; font-size: 12px; color: var(--text-muted); margin-top: 3px; }

.metrics-row { display: flex; gap: 16px; margin: 20px 0; }
.metric {
  flex: 1; background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 14px; display: flex; flex-direction: column; gap: 4px;
}
.metric-label { font-size: 0.8rem; color: var(--text-muted); }
.metric-value { font-size: 1.4rem; font-weight: 700; }

.bar-chart { display: flex; flex-direction: column; gap: 8px; margin: 12px 0 24px; }
.bar-row { display: flex; align-items: center; gap: 10px; }
.bar-label { width: 240px; font-size: 0.9rem; flex-shrink: 0; }
.bar-track { flex: 1; height: 14px; background: var(--border); border-radius: 4px; overflow: hidden; }
.bar-fill { height: 100%; background: var(--primary); }
.bar-pct { width: 48px; text-align: right; font-size: 0.85rem; color: var(--text-muted); }

.review-item {
  background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius);
  margin-bottom: 8px; padding: 10px 14px;
}
.review-item summary { cursor: pointer; font-weight: 600; }
.review-body { margin-top: 12px; }
.review-body ul { padding-left: 20px; }
.rationale { background: #eef4fc; padding: 10px 12px; border-radius: 6px; }

.result-actions { display: flex; gap: 12px; margin-top: 20px; }