:root {
  --bg: #F5F5F5;
  --surface: #FFFFFF;
  --text: #1A1A1A;
  --text-secondary: #666666;
  --accent: #1F4E79;
  --accent-light: #D6E4F0;
  --ok: #2E7D32;
  --ok-bg: #E8F5E9;
  --defect: #C62828;
  --defect-bg: #FFEBEE;
  --na: #757575;
  --na-bg: #EEEEEE;
  --border: #E0E0E0;
  --header-bg: #1A1A1A;
  --header-text: #FFFFFF;
  --radius: 2px;
}

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

html, body {
  height: 100%;
  overflow: hidden;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  display: flex;
  flex-direction: column;
  -webkit-tap-highlight-color: transparent;
  -webkit-user-select: none;
  user-select: none;
}

/* Header */
header {
  background: var(--header-bg);
  color: var(--header-text);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-shrink: 0;
  z-index: 100;
}

.header-title {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 1.5px;
}

.header-btn {
  background: none;
  border: 1px solid rgba(255,255,255,0.3);
  color: white;
  padding: 4px 12px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.5px;
  cursor: pointer;
  border-radius: var(--radius);
}

/* Main */
main {
  flex: 1;
  overflow-y: auto;
  padding: 12px;
  padding-bottom: 60px;
  -webkit-overflow-scrolling: touch;
}

/* Bottom nav */
#bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--surface);
  display: flex;
  border-top: 1px solid var(--border);
  z-index: 100;
}

.nav-btn {
  flex: 1;
  padding: 10px 0;
  background: none;
  border: none;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.8px;
  color: var(--text-secondary);
  cursor: pointer;
  border-top: 2px solid transparent;
}

.nav-btn.active {
  color: var(--accent);
  border-top-color: var(--accent);
}

/* Cards */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px;
  margin-bottom: 8px;
}

/* Vehicle card */
.vehicle-card {
  display: flex;
  align-items: center;
  gap: 12px;
}

.vehicle-info { flex: 1; }

.vehicle-rego {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 1px;
}

.vehicle-detail {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 2px;
}

.vehicle-badge {
  font-size: 10px;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: var(--radius);
  margin-left: 6px;
  vertical-align: middle;
}

.vehicle-badge.site {
  background: #FFF3E0;
  color: #E65100;
}

/* Buttons */
.btn {
  padding: 10px 16px;
  border: none;
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  letter-spacing: 0.5px;
}

.btn-primary { background: var(--accent); color: white; }
.btn-secondary { background: var(--border); color: var(--text); }
.btn-danger { background: var(--defect); color: white; }
.btn-start { background: var(--ok); color: white; padding: 8px 16px; }
.btn-block { display: block; width: 100%; }
.btn-sm { padding: 6px 12px; font-size: 11px; }

/* FAB */
.fab {
  position: fixed;
  bottom: 68px;
  right: 16px;
  width: 48px;
  height: 48px;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: var(--radius);
  font-size: 24px;
  cursor: pointer;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Form elements */
.form-group { margin-bottom: 12px; }

.form-label {
  display: block;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 4px;
  letter-spacing: 0.5px;
}

.form-input, .form-select {
  width: 100%;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  background: var(--surface);
  color: var(--text);
}

.form-input:focus, .form-select:focus {
  outline: none;
  border-color: var(--accent);
}

textarea.form-input { resize: vertical; font-family: inherit; }

.form-row { display: flex; gap: 8px; }
.form-row > * { flex: 1; }

/* Toggle switch */
.toggle-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0;
}

.toggle {
  position: relative;
  width: 44px;
  height: 24px;
  flex-shrink: 0;
}

.toggle input { opacity: 0; width: 0; height: 0; position: absolute; }

.toggle-slider {
  position: absolute;
  inset: 0;
  background: var(--border);
  border-radius: 12px;
  cursor: pointer;
  transition: 0.2s;
}

.toggle-slider::before {
  content: '';
  position: absolute;
  width: 18px;
  height: 18px;
  bottom: 3px;
  left: 3px;
  background: white;
  border-radius: 50%;
  transition: 0.2s;
}

.toggle input:checked + .toggle-slider { background: var(--accent); }
.toggle input:checked + .toggle-slider::before { transform: translateX(20px); }

/* Prestart form */
.prestart-header {
  background: var(--accent);
  color: white;
  padding: 12px;
  border-radius: var(--radius);
  margin-bottom: 12px;
}

.prestart-vehicle {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 1px;
}

.prestart-meta {
  font-size: 12px;
  opacity: 0.8;
  margin-top: 4px;
}

/* Section headers */
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  margin-top: 16px;
  border-bottom: 2px solid var(--accent);
}

.section-title {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--accent);
}

.mark-all-btn {
  font-size: 10px;
  font-weight: 600;
  padding: 4px 8px;
  background: var(--ok-bg);
  color: var(--ok);
  border: 1px solid var(--ok);
  border-radius: var(--radius);
  cursor: pointer;
  letter-spacing: 0.3px;
}

/* Check rows */
.check-item {
  border-bottom: 1px solid var(--border);
}

.check-row {
  display: flex;
  align-items: center;
  padding: 10px 0;
  gap: 8px;
}

.check-label {
  flex: 1;
  font-size: 13px;
  line-height: 1.3;
}

.check-buttons {
  display: flex;
  gap: 3px;
  flex-shrink: 0;
}

.check-btn {
  width: 38px;
  height: 32px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  font-size: 10px;
  font-weight: 700;
  cursor: pointer;
  color: var(--text-secondary);
  transition: all 0.15s;
}

.check-btn.ok.active { background: var(--ok); color: white; border-color: var(--ok); }
.check-btn.na.active { background: var(--na); color: white; border-color: var(--na); }
.check-btn.defect.active { background: var(--defect); color: white; border-color: var(--defect); }

.check-comment {
  width: 100%;
  padding: 6px 8px;
  border: 1px solid var(--defect);
  border-radius: var(--radius);
  font-size: 12px;
  margin: 0 0 8px 0;
  background: var(--defect-bg);
  color: var(--text);
  font-family: inherit;
}

.check-comment::placeholder { color: #999; }

/* Signature */
.signature-container { margin-top: 16px; }

.signature-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.5px;
  margin-bottom: 4px;
}

.signature-pad {
  width: 100%;
  height: 120px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: white;
  touch-action: none;
  cursor: crosshair;
}

.signature-actions {
  display: flex;
  justify-content: flex-end;
  margin-top: 4px;
}

/* Submit bar */
.submit-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 12px 16px;
  background: var(--surface);
  border-top: 2px solid var(--accent);
  z-index: 100;
}

/* History & detail view */
.prestart-card {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
}

.prestart-info { flex: 1; }

.prestart-date {
  font-size: 13px;
  font-weight: 600;
}

.prestart-vehicle-name {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 1px;
}

.prestart-odo {
  font-size: 11px;
  color: var(--text-secondary);
  margin-top: 1px;
}

/* Status badges */
.status-badge {
  font-size: 11px;
  font-weight: 700;
  padding: 4px 8px;
  border-radius: var(--radius);
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.status-pass { background: var(--ok-bg); color: var(--ok); }
.status-fail { background: var(--defect-bg); color: var(--defect); }

/* Detail view */
.detail-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 6px 0;
  border-bottom: 1px solid var(--border);
}

.detail-label { font-size: 13px; flex: 1; }

.detail-status {
  font-size: 12px;
  font-weight: 600;
  flex-shrink: 0;
  margin-left: 8px;
}

.detail-status.ok { color: var(--ok); }
.detail-status.na { color: var(--na); }
.detail-status.defect { color: var(--defect); }

.detail-comment {
  font-size: 11px;
  color: var(--defect);
  padding: 2px 0 6px 8px;
  border-left: 2px solid var(--defect);
  margin: 2px 0 4px 0;
}

.detail-signature img {
  width: 100%;
  max-height: 120px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  object-fit: contain;
}

/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 200;
  display: flex;
  align-items: flex-end;
}

.modal-content {
  background: var(--surface);
  width: 100%;
  padding: 16px;
  border-radius: var(--radius) var(--radius) 0 0;
  max-height: 85vh;
  overflow-y: auto;
}

.modal-title {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.5px;
  margin-bottom: 16px;
}

/* Settings */
.settings-section { margin-bottom: 16px; }

.settings-label {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-secondary);
  letter-spacing: 0.5px;
  margin-bottom: 8px;
}

.settings-stat {
  font-size: 13px;
  color: var(--text-secondary);
  padding: 4px 0;
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-secondary);
}

.empty-state-text {
  font-size: 14px;
  margin-bottom: 8px;
}

/* Responsive */
@media (min-width: 600px) {
  main { max-width: 600px; margin: 0 auto; }
  .submit-bar { max-width: 600px; left: 50%; transform: translateX(-50%); }
}