/**
 * Kaya Exclusive Portal - Modern Design System
 * Complete CSS gebaseerd op originele React versie
 */

/* === ROOT VARIABLES === */
:root {
    /* Colors - Modern palette */
    --primary: #18181b;
    --primary-hover: #27272a;
    --secondary: #71717a;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    
    /* Background colors */
    --background: #ffffff;
    --surface: #f4f4f5;
    --surface-hover: #e4e4e7;
    --card: #ffffff;
    --border: #e4e4e7;
    
    /* Text colors */
    --text: #09090b;
    --text-muted: #71717a;
    --text-on-primary: #ffffff;
    
    /* Status colors */
    --success: #22c55e;
    --success-bg: #f0fdf4;
    --warning: #f59e0b;
    --warning-bg: #fffbeb;
    --danger: #ef4444;
    --danger-bg: #fef2f2;
    --info: #3b82f6;
    --info-bg: #eff6ff;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    
    /* Border radius */
    --radius: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-full: 9999px;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    
    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica', 'Arial', sans-serif;
    --font-mono: ui-monospace, 'Cascadia Code', 'Source Code Pro', Menlo, Consolas, monospace;
}

/* === RESET & BASE === */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    color: var(--text);
    background-color: var(--surface);
    line-height: 1.6;
}

/* === LAYOUT === */
.app-layout {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 16rem;
    background-color: var(--primary);
    color: var(--text-on-primary);
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    z-index: 40;
}

.sidebar-header {
    padding: 1.5rem 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 700;
    text-decoration: none;
    color: var(--text-on-primary);
}

.sidebar-nav {
    padding: 1rem 0;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: all 0.2s;
    cursor: pointer;
    border-left: 3px solid transparent;
}

.nav-item:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--text-on-primary);
}

.nav-item.active {
    background-color: rgba(255, 255, 255, 0.15);
    color: var(--text-on-primary);
    border-left-color: var(--accent);
    font-weight: 600;
}

.nav-item i {
    width: 1.25rem;
    height: 1.25rem;
    flex-shrink: 0;
}

.main-content {
    margin-left: 16rem;
    flex: 1;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.top-bar {
    background-color: var(--card);
    border-bottom: 1px solid var(--border);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 30;
}

.page-content {
    padding: 2rem;
    flex: 1;
}

/* === GRID SYSTEM === */
.grid {
    display: grid;
    gap: 1.5rem;
}

.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

@media (max-width: 768px) {
    .grid-cols-2, .grid-cols-3, .grid-cols-4 {
        grid-template-columns: repeat(1, minmax(0, 1fr));
    }
}

/* === CARDS === */
.card {
    background-color: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: box-shadow 0.2s;
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border);
}

.card-title {
    font-size: 1.125rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.card-body {
    padding: 0;
}

.card-footer {
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
}

/* === STAT CARDS === */
.stat-card {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
    color: white;
    border: none;
    padding: 2rem;
}

.stat-card.success {
    background: linear-gradient(135deg, var(--success) 0%, #16a34a 100%);
}

.stat-card.warning {
    background: linear-gradient(135deg, var(--warning) 0%, #d97706 100%);
}

.stat-card.danger {
    background: linear-gradient(135deg, var(--danger) 0%, #dc2626 100%);
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1;
    margin: 0.5rem 0;
}

.stat-label {
    font-size: 0.875rem;
    opacity: 0.9;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* === BUTTONS === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
    font-weight: 500;
    line-height: 1.25rem;
    border-radius: var(--radius);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    white-space: nowrap;
}

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

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

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

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

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

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

.btn-success:hover:not(:disabled) {
    background-color: #16a34a;
}

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

.btn-warning:hover:not(:disabled) {
    background-color: #d97706;
}

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

.btn-danger:hover:not(:disabled) {
    background-color: #dc2626;
}

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

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

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

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

.btn-sm {
    padding: 0.375rem 0.875rem;
    font-size: 0.8125rem;
}

.btn-lg {
    padding: 0.875rem 1.75rem;
    font-size: 1rem;
}

/* === FORMS === */
.form-group {
    margin-bottom: 1.25rem;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text);
}

.form-control {
    width: 100%;
    padding: 0.625rem 0.875rem;
    font-size: 0.875rem;
    line-height: 1.25rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background-color: var(--background);
    color: var(--text);
    transition: all 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-control:disabled {
    background-color: var(--surface);
    cursor: not-allowed;
    opacity: 0.6;
}

select.form-control {
    cursor: pointer;
}

textarea.form-control {
    min-height: 100px;
    resize: vertical;
}

.form-help {
    font-size: 0.8125rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

/* === TABLES === */
.table-container {
    overflow-x: auto;
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

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

.table thead {
    background-color: var(--surface);
}

.table th {
    padding: 0.875rem 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--text);
    border-bottom: 1px solid var(--border);
}

.table td {
    padding: 0.875rem 1rem;
    border-bottom: 1px solid var(--border);
}

.table tbody tr:hover {
    background-color: var(--surface);
}

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

/* === BADGES === */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.625rem;
    font-size: 0.75rem;
    font-weight: 500;
    border-radius: var(--radius-full);
    white-space: nowrap;
}

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

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

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

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

.badge-secondary {
    background-color: var(--surface);
    color: var(--text-muted);
}

/* === ALERTS === */
.alert {
    padding: 1rem 1.25rem;
    border-radius: var(--radius);
    border: 1px solid;
    margin-bottom: 1rem;
}

.alert-success {
    background-color: var(--success-bg);
    border-color: var(--success);
    color: #15803d;
}

.alert-warning {
    background-color: var(--warning-bg);
    border-color: var(--warning);
    color: #92400e;
}

.alert-danger {
    background-color: var(--danger-bg);
    border-color: var(--danger);
    color: #991b1b;
}

.alert-info {
    background-color: var(--info-bg);
    border-color: var(--info);
    color: #1e40af;
}

/* === MODALS === */
.modal-overlay {
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 50;
    padding: 1rem;
}

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

.modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-title {
    font-size: 1.25rem;
    font-weight: 600;
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
}

/* === UTILITIES === */
.text-muted { color: var(--text-muted); }
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.text-lg { font-size: 1.125rem; }
.text-xl { font-size: 1.25rem; }
.text-2xl { font-size: 1.5rem; }

.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-1 { gap: 0.25rem; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }

.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 0.75rem; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-4 { margin-top: 1rem; }

.p-4 { padding: 1rem; }
.p-6 { padding: 1.5rem; }

/* === RESPONSIVE === */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s;
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
}

/* === ANIMATIONS === */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.3s ease-in;
}

.slide-in {
    animation: slideIn 0.3s ease-out;
}