/* Root Variables */
:root {
    --primary-color: #3b82f6;
    --primary-dark: #2563eb;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --dark-bg: #1e293b;
    --light-bg: #f8fafc;
    --card-bg: #FFFFFF;
    --border-color: #e2e8f0;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 2px 4px rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: #f1f5f9;
    min-height: 100vh;
    padding: 20px;
    color: var(--text-primary);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

/* Header */
.header {
    background: var(--card-bg);
    padding: 24px 32px;
    border-radius: 4px;
    box-shadow: var(--shadow);
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    border: 1px solid var(--border-color);
}

.header h1 {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
    letter-spacing: -0.5px;
}

.auth-status {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--light-bg);
    border-radius: 4px;
    font-size: 13px;
    font-weight: 500;
    border: 1px solid var(--border-color);
}

.status-indicator {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.status-indicator.online {
    background: var(--success-color);
}

.status-indicator.offline {
    background: var(--text-secondary);
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* Login Section */
.login-section {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 60vh;
}

.login-section .card {
    max-width: 500px;
    width: 100%;
}

.login-buttons {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin: 24px 0;
}

.btn-large {
    padding: 16px 24px;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
    font-size: 15px;
    font-weight: 500;
    text-transform: none;
    letter-spacing: 0;
}

.btn-large small {
    font-size: 13px;
    font-weight: 400;
    margin-top: 6px;
    opacity: 0.8;
    text-transform: none;
}

/* Card */
.card {
    background: var(--card-bg);
    border-radius: 4px;
    padding: 24px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

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

.card-header h2 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.subtitle {
    color: var(--text-secondary);
    margin-bottom: 16px;
}

/* Info Box */
.info-box {
    background: #eff6ff;
    border: 1px solid #dbeafe;
    border-radius: 4px;
    padding: 16px;
    margin-top: 24px;
    font-size: 13px;
}

.info-box strong {
    display: block;
    margin-bottom: 8px;
    color: #1e40af;
    font-weight: 600;
}

.info-box ul {
    margin-left: 20px;
    color: var(--text-secondary);
}

.info-box li {
    margin: 4px 0;
    line-height: 1.5;
}

/* Buttons */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 13px;
}

.btn:hover {
    opacity: 0.9;
}

.btn:active {
    opacity: 1;
}

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

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

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

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

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

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

.btn-outline:hover {
    background: var(--light-bg);
}

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

/* Tabs */
.tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
}

.tab-btn {
    background: var(--card-bg);
    color: var(--text-secondary);
    padding: 12px 24px;
    border: 1px solid var(--border-color);
    border-radius: 4px 4px 0 0;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.tab-btn:hover {
    background: var(--light-bg);
}

.tab-btn.active {
    background: var(--primary-color);
    color: white;
    border: 1px solid var(--primary-color);
    font-weight: 600;
}

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

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table thead {
    background: var(--light-bg);
}

.data-table th {
    padding: 12px;
    text-align: left;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 2px solid var(--border-color);
}

.data-table td {
    padding: 12px;
    border-bottom: 1px solid var(--border-color);
}

.data-table tbody tr:hover {
    background: var(--light-bg);
}

.data-table .loading {
    text-align: center;
    color: var(--text-secondary);
    padding: 40px;
}

.data-table .empty {
    text-align: center;
    color: var(--text-secondary);
    padding: 40px;
}

/* Status Badge */
.status-badge {
    padding: 4px 12px;
    border-radius: 3px;
    font-size: 11px;
    font-weight: 600;
    display: inline-block;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.status-free {
    background: #d1fae5;
    color: #065f46;
    border: 1px solid #a7f3d0;
}

.status-occupied {
    background: #fecaca;
    color: #991b1b;
    border: 1px solid #fca5a5;
}

.status-reserved {
    background: #fef3c7;
    color: #92400e;
    border: 1px solid #fde68a;
}

.status-active {
    background: #dbeafe;
    color: #1e40af;
    border: 1px solid #bfdbfe;
}

.status-cancelled {
    background: #f1f5f9;
    color: #475569;
    border: 1px solid #cbd5e1;
}

.status-completed {
    background: #e0e7ff;
    color: #3730a3;
    border: 1px solid #c7d2fe;
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal-content {
    background: var(--card-bg);
    border-radius: 12px;
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    margin: 0;
    font-size: 20px;
}

.close-btn {
    background: none;
    border: none;
    font-size: 28px;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
}

.close-btn:hover {
    background: var(--light-bg);
}

.modal-body {
    padding: 20px;
}

.modal-footer {
    padding: 20px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

/* Toast */
.toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background: var(--dark-bg);
    color: white;
    padding: 16px 24px;
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    z-index: 2000;
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        transform: translateY(100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

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

.toast.error {
    background: var(--danger-color);
}

/* Logout Container */
.logout-container {
    text-align: center;
    margin-top: 24px;
}

/* Utility Classes */
.hidden {
    display: none !important;
}

.text-center {
    text-align: center;
}

/* Responsive */
@media (max-width: 768px) {
    .header {
        flex-direction: column;
        gap: 16px;
    }

    .tabs {
        flex-direction: column;
    }

    .card-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .data-table {
        font-size: 14px;
    }

    .data-table th,
    .data-table td {
        padding: 8px;
    }
}