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

:root {
    --primary: #1a73e8;
    --primary-dark: #1557b0;
    --danger: #d93025;
    --success: #188038;
    --warning: #f9ab00;
    --bg: #f8f9fa;
    --card: #ffffff;
    --text: #202124;
    --text-secondary: #5f6368;
    --border: #dadce0;
    --radius: 12px;
    --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-lg: 0 4px 6px rgba(0,0,0,0.07), 0 10px 15px rgba(0,0,0,0.1);
    --transition: 0.2s ease;
}

html {
    font-size: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
    min-height: 100vh;
}

a {
    color: var(--primary);
    text-decoration: none;
}

button, .btn {
    cursor: pointer;
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 500;
    padding: 10px 24px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--card);
    color: var(--text);
    transition: all var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    line-height: 1.2;
}

button:hover, .btn:hover {
    background: #f1f3f4;
    box-shadow: var(--shadow);
}

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

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

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

.btn-danger:hover {
    background: #c62828;
}

.btn-success {
    background: var(--success);
    color: white;
    border-color: var(--success);
}

.btn-success:hover {
    background: #137333;
}

.btn-sm {
    padding: 6px 14px;
    font-size: 0.8125rem;
}

input, select, textarea {
    font-family: inherit;
    font-size: 0.9375rem;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--card);
    color: var(--text);
    transition: border-color var(--transition), box-shadow var(--transition);
    width: 100%;
    outline: none;
}

input:focus, select:focus, textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(26,115,232,0.15);
}

textarea {
    resize: vertical;
    min-height: 80px;
}

label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 6px;
    color: var(--text);
}

.form-group {
    margin-bottom: 20px;
}

.form-check {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 12px;
}

.form-check input[type="checkbox"] {
    width: 18px;
    height: 18px;
    margin-top: 3px;
    flex-shrink: 0;
    accent-color: var(--primary);
}

.form-check label {
    margin-bottom: 0;
    font-weight: 400;
    font-size: 0.9375rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

@media (max-width: 640px) {
    .form-row {
        grid-template-columns: 1fr;
    }
}

.card {
    background: var(--card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 24px;
    border: 1px solid var(--border);
}

.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.badge-free {
    background: #e6f4ea;
    color: var(--success);
}

.badge-booked {
    background: #fef7e0;
    color: #e37400;
}

.badge-rented {
    background: #fce8e6;
    color: var(--danger);
}

.badge-completed {
    background: #e8f0fe;
    color: var(--primary);
}

.badge-cancelled {
    background: #f1f3f4;
    color: var(--text-secondary);
}

/* Header */
.header {
    background: var(--card);
    border-bottom: 1px solid var(--border);
    padding: 12px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text);
}

.header-logo img {
    height: 40px;
    width: auto;
}

.header-links {
    display: flex;
    gap: 16px;
    align-items: center;
}

/* Main page */
.main-page {
    max-width: 720px;
    margin: 0 auto;
    padding: 40px 24px 80px;
}

.main-page h1 {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: 8px;
    text-align: center;
}

.main-page .subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 40px;
    font-size: 1.05rem;
}

.booking-step {
    display: none;
}

.booking-step.active {
    display: block;
}

.step-indicators {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 36px;
}

.step-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--border);
    transition: background var(--transition);
}

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

.step-dot.done {
    background: var(--success);
}

.step-title {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 24px;
}

.notice-text {
    background: #e8f0fe;
    border-radius: 8px;
    padding: 14px 18px;
    font-size: 0.875rem;
    color: var(--primary-dark);
    margin-bottom: 24px;
    border-left: 4px solid var(--primary);
}

.bike-type-section {
    margin-bottom: 28px;
}

.bike-type-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border);
}

.bike-option {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: 8px;
    margin-bottom: 8px;
    cursor: pointer;
    transition: all var(--transition);
}

.bike-option:hover {
    border-color: var(--primary);
    background: #f8faff;
}

.bike-option.selected {
    border-color: var(--primary);
    background: #e8f0fe;
}

.bike-option input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary);
    flex-shrink: 0;
}

.bike-option .bike-info {
    flex: 1;
}

.bike-option .bike-name {
    font-weight: 500;
}

.bike-option .bike-details {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    margin-top: 2px;
}

.bike-option .bike-price {
    font-weight: 600;
    color: var(--primary);
    text-align: right;
    white-space: nowrap;
}

.summary-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 24px;
}

.summary-table th, .summary-table td {
    padding: 10px 12px;
    text-align: left;
    border-bottom: 1px solid var(--border);
    font-size: 0.9375rem;
}

.summary-table th {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.summary-total {
    font-size: 1.15rem;
    font-weight: 700;
    text-align: right;
    padding-top: 16px;
    border-top: 2px solid var(--text);
}

.actions {
    display: flex;
    gap: 12px;
    justify-content: space-between;
    margin-top: 28px;
}

.alert {
    padding: 14px 18px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 0.9375rem;
}

.alert-success {
    background: #e6f4ea;
    color: var(--success);
    border-left: 4px solid var(--success);
}

.alert-error {
    background: #fce8e6;
    color: var(--danger);
    border-left: 4px solid var(--danger);
}

.duration-options {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    gap: 8px;
    margin-bottom: 16px;
}

.duration-opt {
    padding: 10px;
    text-align: center;
    border: 1px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.875rem;
    transition: all var(--transition);
}

.duration-opt:hover {
    border-color: var(--primary);
}

.duration-opt.selected {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.full-day-check {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    background: #f1f3f4;
    border-radius: 8px;
    margin-bottom: 16px;
}

.full-day-check input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary);
}

/* Login page */
.login-page {
    max-width: 400px;
    margin: 80px auto;
    padding: 0 24px;
}

.login-page .card {
    padding: 40px;
}

.login-page h1 {
    font-size: 1.5rem;
    text-align: center;
    margin-bottom: 28px;
}

/* Admin layout */
.admin-layout {
    display: flex;
    min-height: 100vh;
}

.admin-sidebar {
    width: 240px;
    background: var(--card);
    border-right: 1px solid var(--border);
    padding: 0;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 200;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

.admin-sidebar .sidebar-header {
    padding: 20px 20px 16px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.1rem;
}

.admin-sidebar .sidebar-header img {
    height: 32px;
    width: auto;
}

.sidebar-nav {
    flex: 1;
    padding: 12px 8px;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 16px;
    border-radius: 8px;
    color: var(--text);
    font-size: 0.9375rem;
    font-weight: 500;
    transition: all var(--transition);
    margin-bottom: 2px;
    text-decoration: none;
}

.sidebar-nav a:hover {
    background: #f1f3f4;
}

.sidebar-nav a.active {
    background: #e8f0fe;
    color: var(--primary);
}

.sidebar-nav a .icon {
    width: 20px;
    text-align: center;
    flex-shrink: 0;
}

.sidebar-footer {
    padding: 12px 8px;
    border-top: 1px solid var(--border);
}

.admin-main {
    flex: 1;
    margin-left: 240px;
    padding: 32px;
    min-height: 100vh;
}

.admin-main .page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 28px;
}

.admin-main .page-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
}

/* Dashboard cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 32px;
}

.stat-card {
    background: var(--card);
    border-radius: var(--radius);
    padding: 20px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}

.stat-card .stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text);
    line-height: 1.2;
}

.stat-card .stat-label {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    margin-top: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 500;
}

.stat-card .stat-icon {
    font-size: 1.5rem;
    margin-bottom: 8px;
}

/* Table */
.table-container {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9375rem;
}

table th {
    text-align: left;
    padding: 12px 16px;
    font-weight: 600;
    font-size: 0.8125rem;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    color: var(--text-secondary);
    border-bottom: 2px solid var(--border);
    white-space: nowrap;
}

table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    vertical-align: middle;
}

table tr:hover td {
    background: #f8f9fa;
}

.table-actions {
    display: flex;
    gap: 6px;
    flex-wrap: nowrap;
}

/* Modal */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.4);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.modal-overlay.open {
    display: flex;
}

.modal {
    background: var(--card);
    border-radius: var(--radius);
    padding: 32px;
    width: 100%;
    max-width: 520px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
}

.modal h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 20px;
}

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

.empty-state p {
    font-size: 1rem;
    margin-bottom: 8px;
}

/* Bike colors */
.color-preview {
    display: inline-block;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    border: 1px solid var(--border);
    vertical-align: middle;
}

/* Responsive admin */
@media (max-width: 768px) {
    .admin-sidebar {
        width: 60px;
        overflow: hidden;
    }

    .admin-sidebar .sidebar-header span,
    .sidebar-nav a span,
    .sidebar-footer span {
        display: none;
    }

    .sidebar-nav a {
        justify-content: center;
        padding: 12px;
    }

    .admin-main {
        margin-left: 60px;
        padding: 20px 16px;
    }

    .stats-grid {
        grid-template-columns: 1fr 1fr;
    }

    .admin-sidebar .sidebar-header {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
}

/* Loading */
.loading {
    text-align: center;
    padding: 40px;
    color: var(--text-secondary);
}

.spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
    margin: 0 auto 12px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Tabs in admin */
.admin-content {
    display: none;
}

.admin-content.active {
    display: block;
}

/* Client history */
.history-item {
    font-size: 0.8125rem;
    padding: 4px 0;
    color: var(--text-secondary);
}

/* Settings section */
.settings-section {
    margin-bottom: 36px;
}

.settings-section h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border);
}

.logo-preview {
    max-width: 200px;
    max-height: 80px;
    margin-bottom: 12px;
    display: block;
}