:root {
    /* Color Palette - Premium Gradient Theme */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --success-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --warning-gradient: linear-gradient(135deg, #fa709a 0%, #fee140 100%);

    /* Solid Colors */
    --primary-color: #667eea;
    --primary-dark: #5568d3;
    --secondary-color: #764ba2;
    --accent-color: #f5576c;
    --success-color: #0ea5e9;
    --warning-color: #f59e0b;

    /* Neutral Colors - Light Theme */
    --bg-primary: #f8f9fe;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f1f3f9;
    --bg-card: #ffffff;
    --bg-hover: #e8ebf5;

    /* Text Colors */
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --text-inverse: #ffffff;

    /* Border & Shadow */
    --border-color: rgba(102, 126, 234, 0.15);
    --border-focus: rgba(102, 126, 234, 0.4);
    --shadow-sm: 0 2px 8px rgba(102, 126, 234, 0.08);
    --shadow-md: 0 4px 16px rgba(102, 126, 234, 0.12);
    --shadow-lg: 0 8px 32px rgba(102, 126, 234, 0.16);
    --shadow-glow: 0 0 20px rgba(102, 126, 234, 0.25);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

/* Animated Background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(circle at 20% 20%, rgba(102, 126, 234, 0.06) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(118, 75, 162, 0.06) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

.app-container {
    position: relative;
    z-index: 1;
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

/* Header */
.header {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--primary-gradient);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.logo-section {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo-icon {
    width: 48px;
    height: 48px;
    background: var(--primary-gradient);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: var(--shadow-glow);
    animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.05);
    }
}

.logo-section h1 {
    font-size: 1.75rem;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-stats {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.stat-card {
    background: var(--bg-tertiary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 120px;
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 500;
}

.stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-top: 0.25rem;
}

.stat-active {
    background: var(--success-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-completed {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Main Content */
.main-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

/* Section Styles */
.section-header {
    margin-bottom: var(--spacing-md);
}

.section-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.section-subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Reservation Form Section */
.reservation-form-section {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.reservation-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.form-group.full-width {
    grid-column: 1 / -1;
}

.form-group label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-group input,
.form-group select,
.form-group textarea {
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 0.75rem 1rem;
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: inherit;
    transition: all var(--transition-normal);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--border-focus);
    background: var(--bg-secondary);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
}

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

/* Buttons */
.btn-primary {
    background: var(--primary-gradient);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-md);
    margin-top: var(--spacing-sm);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.btn-primary:active {
    transform: translateY(0);
}

/* Filters Section */
.filters-section {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.filters-container {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    align-items: center;
}

.search-box {
    flex: 1;
    min-width: 250px;
    position: relative;
    display: flex;
    align-items: center;
}

.search-box svg {
    position: absolute;
    left: 1rem;
    color: var(--text-muted);
    pointer-events: none;
}

.search-box input {
    width: 100%;
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 0.75rem 1rem 0.75rem 3rem;
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: all var(--transition-normal);
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--border-focus);
}

.filter-buttons {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
}

.filter-btn {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.filter-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.filter-btn.active {
    background: var(--primary-gradient);
    color: white;
    border-color: transparent;
    box-shadow: var(--shadow-glow);
}

.sort-select {
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 0.5rem 1rem;
    color: var(--text-primary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.sort-select:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* Reservations Section */
.reservations-section {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.reservations-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

/* Empty State */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    text-align: center;
}

.empty-icon {
    width: 80px;
    height: 80px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    margin-bottom: var(--spacing-md);
}

.empty-state h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
    color: var(--text-secondary);
}

.empty-state p {
    color: var(--text-muted);
}

/* Reservation Card */
.reservation-card {
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    transition: all var(--transition-normal);
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.reservation-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.reservation-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-sm);
    gap: var(--spacing-sm);
}

.reservation-client {
    flex: 1;
}

.client-name {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.client-contact {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.status-badge {
    padding: 0.375rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    white-space: nowrap;
}

.status-pending {
    background: rgba(245, 158, 11, 0.15);
    color: #d97706;
    border: 1px solid rgba(245, 158, 11, 0.3);
}

.status-confirmed {
    background: rgba(14, 165, 233, 0.15);
    color: #0284c7;
    border: 1px solid rgba(14, 165, 233, 0.3);
}

.status-completed {
    background: rgba(102, 126, 234, 0.15);
    color: #5568d3;
    border: 1px solid rgba(102, 126, 234, 0.3);
}

.status-cancelled {
    background: rgba(245, 87, 108, 0.15);
    color: #dc2626;
    border: 1px solid rgba(245, 87, 108, 0.3);
}

.reservation-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
}

.detail-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.9rem;
}

.detail-icon {
    width: 20px;
    height: 20px;
    color: var(--primary-color);
    flex-shrink: 0;
}

.detail-label {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.detail-value {
    color: var(--text-primary);
    font-weight: 500;
}

.special-requests {
    padding: var(--spacing-sm);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.special-requests-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.special-requests-text {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.reservation-actions {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
}

.action-btn {
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    gap: 0.375rem;
}

.btn-confirm {
    background: rgba(14, 165, 233, 0.15);
    color: #0284c7;
    border: 1px solid rgba(14, 165, 233, 0.3);
}

.btn-confirm:hover {
    background: rgba(14, 165, 233, 0.25);
    transform: translateY(-1px);
}

.btn-complete {
    background: rgba(102, 126, 234, 0.15);
    color: #5568d3;
    border: 1px solid rgba(102, 126, 234, 0.3);
}

.btn-complete:hover {
    background: rgba(102, 126, 234, 0.25);
    transform: translateY(-1px);
}

.btn-cancel {
    background: rgba(245, 87, 108, 0.15);
    color: #dc2626;
    border: 1px solid rgba(245, 87, 108, 0.3);
}

.btn-cancel:hover {
    background: rgba(245, 87, 108, 0.25);
    transform: translateY(-1px);
}

.btn-delete {
    background: var(--bg-tertiary);
    color: var(--text-muted);
    border: 1px solid var(--border-color);
}

.btn-delete:hover {
    background: rgba(245, 87, 108, 0.15);
    color: #dc2626;
    border-color: rgba(245, 87, 108, 0.3);
    transform: translateY(-1px);
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: var(--bg-card);
    color: var(--text-primary);
    padding: 1rem 1.5rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    transform: translateX(400px);
    transition: transform var(--transition-normal);
    z-index: 1000;
    max-width: 400px;
}

.toast.show {
    transform: translateX(0);
}

.toast-icon {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    flex-shrink: 0;
}

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

.toast.error .toast-icon {
    background: var(--secondary-gradient);
}

.toast.info .toast-icon {
    background: var(--primary-gradient);
}

.toast-message {
    font-size: 0.95rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .app-container {
        padding: var(--spacing-sm);
    }

    .header-content {
        flex-direction: column;
        align-items: stretch;
    }

    .header-stats {
        justify-content: space-between;
    }

    .stat-card {
        flex: 1;
        min-width: auto;
    }

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

    .filters-container {
        flex-direction: column;
        align-items: stretch;
    }

    .search-box {
        width: 100%;
    }

    .filter-buttons {
        justify-content: center;
    }

    .reservation-details {
        grid-template-columns: 1fr;
    }

    .toast {
        right: 1rem;
        left: 1rem;
        max-width: none;
    }
}

@media (max-width: 480px) {
    .logo-section h1 {
        font-size: 1.25rem;
    }

    .stat-value {
        font-size: 1.5rem;
    }

    .section-header h2 {
        font-size: 1.25rem;
    }
}