:root {
  --dark-blue: #0b2a4a;
  --blue: #14477a;
  --accent: #1f6feb;
  --bg: #f5f7fa;
  --card-bg: #ffffff;
  --border: #dbe2ea;
  --danger: #c0392b;
  --success: #1e8449;
  --warn: #b9770e;
  --text: #1c2733;
  --muted: #5b6b7c;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: "Segoe UI", Roboto, Arial, sans-serif;
  line-height: 1.5;
  -webkit-user-select: none;
  user-select: none;
}

body.allow-select {
  -webkit-user-select: text;
  user-select: text;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 24px 16px 60px;
}

.wide {
  max-width: 1200px;
}

h1, h2, h3 {
  color: var(--dark-blue);
  margin: 0 0 8px;
}

.subtitle {
  color: var(--muted);
  margin-bottom: 24px;
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px;
  margin-bottom: 20px;
  box-shadow: 0 1px 3px rgba(11, 42, 74, 0.06);
}

.field {
  margin-bottom: 16px;
}

.field label {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--dark-blue);
}

.field input,
.field select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 16px;
  background: #fff;
  color: var(--text);
}

.field input:focus,
.field select:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 12px 22px;
  border-radius: 6px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease;
}

.btn:hover {
  background: #1657b8;
}

.btn:disabled {
  background: #9db4c9;
  cursor: not-allowed;
}

.btn-secondary {
  background: #fff;
  color: var(--blue);
  border: 1px solid var(--blue);
}

.btn-secondary:hover {
  background: #eef4fb;
}

.btn-danger {
  background: var(--danger);
}

.btn-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}

.error-box {
  background: #fdecea;
  border: 1px solid #f5c2be;
  color: var(--danger);
  padding: 12px 14px;
  border-radius: 6px;
  margin-bottom: 16px;
  font-weight: 500;
}

.info-box {
  background: #eaf2fb;
  border: 1px solid #c3d9f0;
  color: var(--blue);
  padding: 12px 14px;
  border-radius: 6px;
  margin-bottom: 16px;
}

.hidden {
  display: none !important;
}

/* Test header */
.test-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  background: var(--dark-blue);
  color: #fff;
  padding: 14px 20px;
  border-radius: 10px;
  margin-bottom: 20px;
}

.test-header .meta {
  font-size: 14px;
  opacity: 0.9;
}

.timer {
  font-size: 22px;
  font-weight: 700;
  background: rgba(255, 255, 255, 0.15);
  padding: 6px 16px;
  border-radius: 8px;
  letter-spacing: 1px;
}

.timer.low {
  background: var(--danger);
  animation: pulse 1s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

.progress-text {
  font-weight: 600;
  color: var(--blue);
  margin-bottom: 10px;
}

.progress-bar-track {
  width: 100%;
  height: 8px;
  background: #e3eaf1;
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 20px;
}

.progress-bar-fill {
  height: 100%;
  background: var(--accent);
  transition: width 0.2s ease;
}

pre.code-block {
  background: #0b1d33;
  color: #e7f0fa;
  padding: 16px;
  border-radius: 8px;
  overflow-x: auto;
  font-family: "Consolas", "Courier New", monospace;
  font-size: 14.5px;
  line-height: 1.55;
  white-space: pre;
}

.question-text {
  font-weight: 600;
  font-size: 17px;
  margin: 16px 0 12px;
  color: var(--dark-blue);
}

.option {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 10px;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease;
}

.option:hover {
  border-color: var(--accent);
  background: #f7fafd;
}

.option.selected {
  border-color: var(--accent);
  background: #eaf2fb;
}

.option input {
  margin-top: 3px;
}

.option-label {
  font-weight: 700;
  color: var(--blue);
  min-width: 18px;
}

.nav-buttons {
  display: flex;
  justify-content: space-between;
  margin-top: 20px;
  gap: 10px;
  flex-wrap: wrap;
}

.jump-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(38px, 1fr));
  gap: 6px;
  margin: 16px 0;
}

.jump-btn {
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 6px;
  padding: 6px 0;
  font-size: 13px;
  cursor: pointer;
  color: var(--muted);
}

.jump-btn.answered {
  background: #e3f3e8;
  border-color: var(--success);
  color: var(--success);
  font-weight: 600;
}

.jump-btn.current {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(31, 111, 235, 0.3);
}

.result-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px 24px;
  margin: 16px 0;
}

.result-grid .label {
  color: var(--muted);
  font-size: 13px;
}

.result-grid .value {
  font-size: 18px;
  font-weight: 700;
  color: var(--dark-blue);
}

footer.note {
  color: var(--muted);
  font-size: 13px;
  margin-top: 30px;
  text-align: center;
}

/* Dashboard */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 12px;
  margin-bottom: 20px;
}

.stat-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px;
  text-align: center;
}

.stat-card .num {
  font-size: 26px;
  font-weight: 800;
  color: var(--dark-blue);
}

.stat-card .lbl {
  font-size: 12.5px;
  color: var(--muted);
  margin-top: 4px;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  font-size: 14px;
}

table th, table td {
  border: 1px solid var(--border);
  padding: 8px 10px;
  text-align: left;
  white-space: nowrap;
}

table th {
  background: var(--dark-blue);
  color: #fff;
  position: sticky;
  top: 0;
}

.table-wrap {
  overflow-x: auto;
  border-radius: 8px;
  border: 1px solid var(--border);
}

.badge {
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 12.5px;
  font-weight: 700;
  display: inline-block;
}

.badge.Completed { background: #e3f3e8; color: var(--success); }
.badge.Terminated { background: #fdecea; color: var(--danger); }
.badge.TimeExpired { background: #fdf1de; color: var(--warn); }
.badge.InProgress { background: #eaf2fb; color: var(--blue); }
.badge.NotAttended { background: #eee; color: #666; }

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-bottom: 16px;
}

.toolbar input, .toolbar select {
  padding: 9px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
}

@media (max-width: 600px) {
  .result-grid {
    grid-template-columns: 1fr;
  }
  .test-header {
    flex-direction: column;
    align-items: flex-start;
  }
}