:root {
    --color-bg: #fafafa;
    --color-surface: #ffffff;
    --color-border: #e8e8e8;
    --color-border-light: #f0f0f0;
    --color-text: #1a1a1a;
    --color-text-muted: #6b6b6b;
    --color-text-light: #999;
    --color-primary: #1a1a1a;
    --color-primary-hover: #333;
    --color-accent: #c9a962;
    --color-accent-light: #f5f0e6;
    --color-success: #2d6a4f;
    --color-success-bg: #e8f5e9;
    --color-warning: #b8860b;
    --color-warning-bg: #fff8e1;
    --color-error: #c0392b;
    --color-error-bg: #fdecea;
    --color-info: #2563eb;
    --font: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --radius: 8px;
    --radius-lg: 12px;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.08);
    --transition: 0.2s ease;
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

body {
    font-family: var(--font);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.5;
    min-height: 100vh;
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
}

img {
    max-width: 80%;
    height: auto;
    display: block;
}

.container {
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Typography */
h1 {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

h2 {
    font-size: 1.375rem;
    font-weight: 600;
    letter-spacing: -0.01em;
}

h3 {
    font-size: 1.125rem;
    font-weight: 600;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    font-family: var(--font);
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
}

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

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

.btn-primary:hover:not(:disabled) {
    background: var(--color-primary-hover);
}

.btn-outline {
    background: transparent;
    color: var(--color-text);
    border-color: var(--color-border);
}

.btn-outline:hover:not(:disabled) {
    border-color: var(--color-text);
}

.btn-ghost {
    background: transparent;
    color: var(--color-text-muted);
    border-color: transparent;
}

.btn-ghost:hover:not(:disabled) {
    color: var(--color-text);
    background: var(--color-border-light);
}

.btn-success {
    background: var(--color-success);
    color: #fff;
}

.btn-danger {
    background: var(--color-error);
    color: #fff;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 0.8125rem;
}

.btn-lg {
    padding: 14px 28px;
    font-size: 1rem;
}

.btn-block {
    width: 100%;
}

/* Forms */
.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--color-text-muted);
    margin-bottom: 6px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px 14px;
    font-family: var(--font);
    font-size: 0.9375rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-surface);
    transition: border-color var(--transition);
}

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

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

.form-actions {
    display: flex;
    gap: 12px;
    margin-top: 24px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.875rem;
    cursor: pointer;
}

/* Alerts */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius);
    font-size: 0.875rem;
    margin-bottom: 16px;
}

.alert-error {
    background: var(--color-error-bg);
    color: var(--color-error);
}

.alert-success {
    background: var(--color-success-bg);
    color: var(--color-success);
}

.alert-info {
    background: #e3f2fd;
    color: var(--color-info);
}

/* Badges */
.badge {
    display: inline-block;
    padding: 4px 10px;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: 100px;
    letter-spacing: 0.01em;
}

.badge-pending {
    background: var(--color-warning-bg);
    color: var(--color-warning);
}

.badge-confirmed {
    background: var(--color-success-bg);
    color: var(--color-success);
}

.badge-rejected,
.badge-cancelled {
    background: var(--color-error-bg);
    color: var(--color-error);
}

.badge-seated {
    background: #e3f2fd;
    color: var(--color-info);
}

.badge-completed {
    background: #f3e5f5;
    color: #7b1fa2;
}

.badge-no_show {
    background: #eceff1;
    color: #546e7a;
}

.badge-active {
    background: var(--color-success-bg);
    color: var(--color-success);
}

.badge-inactive,
.badge-suspended {
    background: var(--color-error-bg);
    color: var(--color-error);
}

.badge-pending_approval {
    background: var(--color-warning-bg);
    color: var(--color-warning);
}

/* Landing */
.landing-header {
    padding: 20px 0;
    border-bottom: 1px solid var(--color-border-light);
    background: var(--color-surface);
}

.landing-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.landing-header nav {
    display: flex;
    gap: 12px;
    align-items: center;
}

.logo {
    font-size: 1.125rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.hero {
    padding: 100px 0 80px;
    text-align: center;
}

.hero h1 {
    font-size: 2.75rem;
    max-width: 640px;
    margin: 0 auto 20px;
    line-height: 1.15;
}

.hero p {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    max-width: 520px;
    margin: 0 auto 36px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.features {
    padding: 60px 0 100px;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-card {
    padding: 32px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
}

.feature-card h3 {
    margin-bottom: 8px;
}

.feature-card p {
    color: var(--color-text-muted);
    font-size: 0.9375rem;
}

/* Auth pages */
.auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 24px;
    background: var(--color-bg);
}

.auth-card,
.register-container {
    width: 100%;
    max-width: 440px;
    padding: 40px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

.register-container {
    max-width: 560px;
}

.auth-card h1,
.register-container h1 {
    font-size: 1.5rem;
    margin: 16px 0 24px;
}

.auth-footer {
    margin-top: 24px;
    text-align: center;
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.auth-footer a {
    color: var(--color-primary);
    font-weight: 500;
    text-decoration: underline;
}

/* Registration steps */
.steps-indicator {
    display: flex;
    gap: 8px;
    margin-bottom: 32px;
    flex-wrap: wrap;
}

.steps-indicator .step {
    font-size: 0.75rem;
    color: var(--color-text-light);
    padding: 4px 0;
}

.steps-indicator .step.active {
    color: var(--color-primary);
    font-weight: 600;
}

.form-step {
    display: none;
}

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

.hours-row {
    display: grid;
    grid-template-columns: 120px 80px 1fr auto 1fr;
    gap: 8px;
    align-items: center;
    margin-bottom: 12px;
    font-size: 0.875rem;
}

.hours-row .day-label {
    font-weight: 500;
}

.hours-row input[type="time"] {
    padding: 6px 8px;
    font-size: 0.8125rem;
}

/* Tables */
.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.data-table th,
.data-table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--color-border-light);
}

.data-table th {
    font-weight: 500;
    color: var(--color-text-muted);
    font-size: 0.8125rem;
    background: var(--color-bg);
}

.data-table tbody tr:hover {
    background: #fafafa;
}

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

/* Cards */
.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 24px;
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.card-header h2 {
    font-size: 1rem;
    font-weight: 600;
}

/* Empty / Loading states */
.empty-state,
.loading-state {
    text-align: center;
    padding: 48px 24px;
    color: var(--color-text-muted);
}

.loading-spinner {
    width: 32px;
    height: 32px;
    border: 2px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 16px;
}

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

/* Pagination */
.pagination {
    display: flex;
    gap: 8px;
    justify-content: center;
    margin-top: 24px;
}

.pagination a,
.pagination span {
    padding: 8px 14px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 0.875rem;
}

.pagination a:hover {
    border-color: var(--color-primary);
}

.pagination .active {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

/* Filters bar */
.filters-bar {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 20px;
    align-items: flex-end;
}

.filters-bar .form-group {
    margin-bottom: 0;
    flex: 1;
    min-width: 140px;
}

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

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

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

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--color-text-muted);
    line-height: 1;
}

/* Responsive */
@media (max-width: 768px) {
    .grid-3 {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hours-row {
        grid-template-columns: 1fr;
        gap: 4px;
    }
}

@media (max-width: 480px) {

    .auth-card,
    .register-container {
        padding: 24px;
    }
}