:root {
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --danger: #dc2626;
  --danger-hover: #b91c1c;
  --success: #16a34a;
  --warning: #f59e0b;
  --bg: #f8fafc;
  --card: #ffffff;
  --border: #e2e8f0;
  --text: #1e293b;
  --text-muted: #64748b;
  --shadow: 0 1px 3px rgba(0,0,0,0.1);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

#app { max-width: 960px; margin: 0 auto; padding: 1rem; }

/* Header */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
  margin-bottom: 1.5rem;
  border-bottom: 2px solid var(--primary);
}

.app-header h1 { font-size: 1.4rem; color: var(--primary); }

.header-controls { display: flex; gap: 0.5rem; align-items: center; }

/* Wizard stepper */
.stepper {
  display: flex;
  gap: 0;
  margin-bottom: 2rem;
  background: var(--card);
  border-radius: 0.5rem;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.stepper-step {
  flex: 1;
  padding: 0.75rem 1rem;
  text-align: center;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  border-bottom: 3px solid transparent;
  transition: all 0.2s;
  color: var(--text-muted);
}

.stepper-step:hover { background: #f1f5f9; }
.stepper-step.active { border-bottom-color: var(--primary); color: var(--primary); font-weight: 600; }
.stepper-step.completed { border-bottom-color: var(--success); color: var(--success); }

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 50%;
  background: var(--border);
  color: var(--text-muted);
  font-size: 0.75rem;
  margin-right: 0.4rem;
}

.stepper-step.active .step-number { background: var(--primary); color: white; }
.stepper-step.completed .step-number { background: var(--success); color: white; }

/* Cards */
.card {
  background: var(--card);
  border-radius: 0.5rem;
  box-shadow: var(--shadow);
  padding: 1.5rem;
  margin-bottom: 1rem;
}

.card-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text);
}

/* Form elements */
input, select, textarea {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 0.375rem;
  font-size: 0.9rem;
  font-family: inherit;
  color: var(--text);
  background: white;
  transition: border-color 0.2s;
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

input[type="number"] { width: 120px; }

label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 0.25rem;
  color: var(--text-muted);
}

.form-row {
  display: flex;
  gap: 1rem;
  align-items: flex-end;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
}

.form-group { flex: 1; min-width: 150px; }
.form-group-sm { flex: 0 0 auto; min-width: 100px; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.5rem 1rem;
  border: none;
  border-radius: 0.375rem;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
  white-space: nowrap;
}

.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-hover); }

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

.btn-success { background: var(--success); color: white; }
.btn-success:hover { background: #15803d; }

.btn-outline {
  background: white;
  color: var(--primary);
  border: 1px solid var(--primary);
}
.btn-outline:hover { background: #eff6ff; }

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  padding: 0.35rem 0.5rem;
}
.btn-ghost:hover { color: var(--danger); background: #fef2f2; }

.btn-sm { padding: 0.35rem 0.65rem; font-size: 0.8rem; }
.btn-lg { padding: 0.65rem 1.5rem; font-size: 1rem; }

.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* Participant list */
.participant-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 0.375rem;
  margin-bottom: 0.5rem;
  background: white;
}

.participant-row .name { flex: 1; font-weight: 500; }

.role-badge {
  font-size: 0.75rem;
  padding: 0.15rem 0.5rem;
  border-radius: 1rem;
  font-weight: 500;
}

.role-badge.leader { background: #dbeafe; color: #1d4ed8; }
.role-badge.deputy { background: #fef3c7; color: #92400e; }
.role-badge.normal { background: #f1f5f9; color: #64748b; }

/* Leg / Car cards */
.leg-card {
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  padding: 1rem;
  margin-bottom: 1rem;
  background: #fafbfc;
}

.leg-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}

.leg-title { font-weight: 600; font-size: 1rem; }

.car-card {
  border: 1px solid #e0e7ff;
  border-radius: 0.375rem;
  padding: 0.75rem;
  margin-bottom: 0.5rem;
  background: white;
}

.car-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
}

/* Checkboxes */
.checkbox-group { display: flex; flex-wrap: wrap; gap: 0.5rem; }

.checkbox-label {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.85rem;
  cursor: pointer;
  padding: 0.25rem 0.5rem;
  border-radius: 0.25rem;
  border: 1px solid var(--border);
  background: white;
  transition: all 0.15s;
}

.checkbox-label:hover { border-color: var(--primary); }
.checkbox-label.checked { background: #eff6ff; border-color: var(--primary); color: var(--primary); }

.checkbox-label input { display: none; }

/* Expense row */
.expense-card {
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  padding: 1rem;
  margin-bottom: 0.75rem;
  background: white;
}

/* Summary table */
.summary-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

.summary-table th {
  background: #f1f5f9;
  padding: 0.6rem 0.75rem;
  text-align: left;
  font-weight: 600;
  border-bottom: 2px solid var(--border);
  white-space: nowrap;
}

.summary-table td {
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--border);
}

.summary-table tr:last-child td { border-bottom: none; }

.summary-table .number { text-align: right; font-variant-numeric: tabular-nums; }

.balance-positive { color: var(--danger); font-weight: 600; }
.balance-negative { color: var(--success); font-weight: 600; }
.balance-zero { color: var(--text-muted); }

/* Transfer suggestions */
.transfer-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  border: 1px solid #dcfce7;
  border-radius: 0.375rem;
  margin-bottom: 0.35rem;
  background: #f0fdf4;
  font-size: 0.9rem;
}

.transfer-amount { font-weight: 700; color: var(--primary); }

/* Autocomplete dropdown */
.autocomplete-wrapper { position: relative; }

.autocomplete-list {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: white;
  border: 1px solid var(--border);
  border-top: none;
  border-radius: 0 0 0.375rem 0.375rem;
  max-height: 200px;
  overflow-y: auto;
  z-index: 50;
  box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.autocomplete-item {
  padding: 0.5rem 0.75rem;
  cursor: pointer;
  font-size: 0.85rem;
}

.autocomplete-item:hover { background: #eff6ff; }

/* Nav buttons */
.nav-buttons {
  display: flex;
  justify-content: space-between;
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

/* Saved trips panel */
.trips-panel {
  border-top: 1px solid var(--border);
  padding-top: 1rem;
  margin-top: 1rem;
}

.trip-list-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 0.375rem;
  margin-bottom: 0.35rem;
  background: white;
}

.trip-list-item .trip-info { flex: 1; }
.trip-list-item .trip-name { font-weight: 500; }
.trip-list-item .trip-date { font-size: 0.8rem; color: var(--text-muted); }

/* Toast notification */
.toast {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  background: var(--success);
  color: white;
  padding: 0.75rem 1.25rem;
  border-radius: 0.5rem;
  font-size: 0.9rem;
  font-weight: 500;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  z-index: 100;
  animation: slideIn 0.3s ease;
}

@keyframes slideIn {
  from { transform: translateY(1rem); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

/* API key banner */
.api-banner {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  border-radius: 0.375rem;
  margin-bottom: 1rem;
  font-size: 0.85rem;
}

.api-banner.configured { background: #f0fdf4; border: 1px solid #bbf7d0; color: #166534; }
.api-banner.missing { background: #fefce8; border: 1px solid #fef08a; color: #854d0e; }

/* Totals row */
.totals-bar {
  display: flex;
  gap: 1.5rem;
  padding: 0.75rem 1rem;
  background: #f1f5f9;
  border-radius: 0.375rem;
  margin-top: 0.75rem;
  font-size: 0.85rem;
  font-weight: 500;
}

.totals-bar .total-label { color: var(--text-muted); }
.totals-bar .total-value { color: var(--text); font-weight: 700; }

/* Responsive */
@media (max-width: 640px) {
  .form-row { flex-direction: column; }
  .form-group, .form-group-sm { min-width: 100%; }
  .stepper { flex-wrap: wrap; }
  .stepper-step { flex: 1 1 45%; font-size: 0.8rem; }
  .summary-table { font-size: 0.75rem; }
  .summary-table th, .summary-table td { padding: 0.4rem; }
  .nav-buttons { flex-direction: column; gap: 0.5rem; }
  .nav-buttons .btn { width: 100%; justify-content: center; }
}

/* Select dropdown */
.select-wrapper { position: relative; }

select {
  appearance: none;
  padding-right: 2rem;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2364748b' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
}

/* Toggle switch for 6+ seats */
.toggle-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
}

.toggle {
  position: relative;
  width: 2.5rem;
  height: 1.4rem;
  background: var(--border);
  border-radius: 0.7rem;
  cursor: pointer;
  transition: background 0.2s;
  flex-shrink: 0;
}

.toggle.active { background: var(--primary); }

.toggle::after {
  content: '';
  position: absolute;
  top: 0.15rem;
  left: 0.15rem;
  width: 1.1rem;
  height: 1.1rem;
  background: white;
  border-radius: 50%;
  transition: transform 0.2s;
}

.toggle.active::after { transform: translateX(1.1rem); }

/* Info text */
.info-text { font-size: 0.8rem; color: var(--text-muted); font-style: italic; }

/* Text export box */
.text-export-box {
  margin-top: 1rem;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  overflow: hidden;
  background: #f8fafc;
}

.text-export-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 0.75rem;
  background: #f1f5f9;
  border-bottom: 1px solid var(--border);
}

.text-export-content {
  padding: 0.75rem;
  margin: 0;
  font-family: inherit;
  font-size: 0.85rem;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--text);
  max-height: 400px;
  overflow-y: auto;
}
/* Cost display inline */
.cost-display {
  font-size: 0.85rem;
  color: var(--primary);
  font-weight: 600;
  padding: 0.25rem 0.5rem;
  background: #eff6ff;
  border-radius: 0.25rem;
}