/**
 * CyberSecBW Design System
 * Single Source of Truth - Produktionsreif
 * 
 * Gilt für: Homepage, Unterseiten, Auth, Kundenbereich
 */

/* ============================================
   1. CSS CUSTOM PROPERTIES (DESIGN TOKENS)
   ============================================ */

:root {
    /* === FARBEN === */
    
    /* Primary Brand Colors */
    --color-primary-50: #e8f4fc;
    --color-primary-100: #c5e4f7;
    --color-primary-200: #9dd2f2;
    --color-primary-300: #75bfec;
    --color-primary-400: #52afe8;
    --color-primary-500: #0a9ddd;
    --color-primary-600: #0889c7;
    --color-primary-700: #0672a8;
    --color-primary-800: #045b89;
    --color-primary-900: #034569;
    
    /* Secondary Colors (Accent) */
    --color-secondary-50: #fdf2f8;
    --color-secondary-100: #fce7f3;
    --color-secondary-200: #fbcfe8;
    --color-secondary-300: #f9a8d4;
    --color-secondary-400: #f472b6;
    --color-secondary-500: #ec4899;
    --color-secondary-600: #db2777;
    --color-secondary-700: #be185d;
    --color-secondary-800: #9d174d;
    --color-secondary-900: #831843;
    
    /* Neutral / Gray Scale */
    --color-gray-50: #f8fafc;
    --color-gray-100: #f1f5f9;
    --color-gray-200: #e2e8f0;
    --color-gray-300: #cbd5e1;
    --color-gray-400: #94a3b8;
    --color-gray-500: #64748b;
    --color-gray-600: #475569;
    --color-gray-700: #334155;
    --color-gray-800: #1e293b;
    --color-gray-900: #0f172a;
    --color-gray-950: #020617;
    
    /* Semantic Colors */
    --color-success-50: #ecfdf5;
    --color-success-100: #d1fae5;
    --color-success-500: #10b981;
    --color-success-600: #059669;
    --color-success-700: #047857;
    
    --color-warning-50: #fffbeb;
    --color-warning-100: #fef3c7;
    --color-warning-500: #f59e0b;
    --color-warning-600: #d97706;
    --color-warning-700: #b45309;
    
    --color-danger-50: #fef2f2;
    --color-danger-100: #fee2e2;
    --color-danger-500: #ef4444;
    --color-danger-600: #dc2626;
    --color-danger-700: #b91c1c;
    
    --color-info-50: #eff6ff;
    --color-info-100: #dbeafe;
    --color-info-500: #3b82f6;
    --color-info-600: #2563eb;
    --color-info-700: #1d4ed8;
    
    /* Dark Mode Base */
    --color-dark-bg: #0a0f1a;
    --color-dark-surface: #111827;
    --color-dark-elevated: #1f2937;
    --color-dark-border: #374151;
    
    /* === TYPOGRAFIE === */
    
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: 'Plus Jakarta Sans', 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    
    /* Font Sizes (Fluid) */
    --text-xs: clamp(0.7rem, 0.8vw, 0.75rem);
    --text-sm: clamp(0.8rem, 0.9vw, 0.875rem);
    --text-base: clamp(0.9rem, 1vw, 1rem);
    --text-lg: clamp(1rem, 1.1vw, 1.125rem);
    --text-xl: clamp(1.1rem, 1.3vw, 1.25rem);
    --text-2xl: clamp(1.25rem, 1.5vw, 1.5rem);
    --text-3xl: clamp(1.5rem, 2vw, 1.875rem);
    --text-4xl: clamp(1.875rem, 2.5vw, 2.25rem);
    --text-5xl: clamp(2.25rem, 3.5vw, 3rem);
    --text-6xl: clamp(2.75rem, 4.5vw, 3.75rem);
    --text-7xl: clamp(3.5rem, 6vw, 4.5rem);
    
    /* Line Heights */
    --leading-none: 1;
    --leading-tight: 1.25;
    --leading-snug: 1.375;
    --leading-normal: 1.5;
    --leading-relaxed: 1.625;
    --leading-loose: 2;
    
    /* Font Weights */
    --font-light: 300;
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;
    --font-extrabold: 800;
    
    /* === SPACING === */
    
    --space-0: 0;
    --space-1: 0.25rem;   /* 4px */
    --space-2: 0.5rem;    /* 8px */
    --space-3: 0.75rem;   /* 12px */
    --space-4: 1rem;      /* 16px */
    --space-5: 1.25rem;   /* 20px */
    --space-6: 1.5rem;    /* 24px */
    --space-7: 1.75rem;   /* 28px */
    --space-8: 2rem;      /* 32px */
    --space-10: 2.5rem;   /* 40px */
    --space-12: 3rem;     /* 48px */
    --space-14: 3.5rem;   /* 56px */
    --space-16: 4rem;     /* 64px */
    --space-20: 5rem;     /* 80px */
    --space-24: 6rem;     /* 96px */
    --space-32: 8rem;     /* 128px */
    
    /* === BORDERS & RADIUS === */
    
    --radius-none: 0;
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    --radius-2xl: 1rem;
    --radius-3xl: 1.5rem;
    --radius-full: 9999px;
    
    --border-width: 1px;
    --border-width-2: 2px;
    
    /* === SHADOWS === */
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --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);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
    --shadow-inner: inset 0 2px 4px 0 rgb(0 0 0 / 0.05);
    
    /* Glow Effects */
    --glow-primary: 0 0 20px rgba(10, 157, 221, 0.3);
    --glow-success: 0 0 20px rgba(16, 185, 129, 0.3);
    --glow-danger: 0 0 20px rgba(239, 68, 68, 0.3);
    
    /* === TRANSITIONS === */
    
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;
    --transition-bounce: 500ms cubic-bezier(0.68, -0.55, 0.265, 1.55);
    
    /* === Z-INDEX SCALE === */
    
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal-backdrop: 400;
    --z-modal: 500;
    --z-popover: 600;
    --z-tooltip: 700;
    --z-toast: 800;
    
    /* === BREAKPOINTS (for reference) === */
    /* sm: 640px, md: 768px, lg: 1024px, xl: 1280px, 2xl: 1536px */
    
    /* === LAYOUT === */
    
    --container-sm: 640px;
    --container-md: 768px;
    --container-lg: 1024px;
    --container-xl: 1280px;
    --container-2xl: 1400px;
    
    --navbar-height: 72px;
    --sidebar-width: 280px;
    --sidebar-collapsed: 80px;
}

/* ============================================
   2. BASE STYLES & RESET
   ============================================ */

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-primary);
    font-size: var(--text-base);
    font-weight: var(--font-normal);
    line-height: var(--leading-normal);
    color: var(--color-gray-100);
    background-color: var(--color-dark-bg);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Focus Styles */
:focus-visible {
    outline: 2px solid var(--color-primary-500);
    outline-offset: 2px;
}

/* Selection */
::selection {
    background-color: var(--color-primary-500);
    color: white;
}

/* Links */
a {
    color: var(--color-primary-400);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-primary-300);
}

/* Images */
img, video {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Lists */
ul, ol {
    list-style: none;
}

/* ============================================
   3. TYPOGRAPHY UTILITIES
   ============================================ */

.font-display { font-family: var(--font-display); }
.font-mono { font-family: var(--font-mono); }

.text-xs { font-size: var(--text-xs); }
.text-sm { font-size: var(--text-sm); }
.text-base { font-size: var(--text-base); }
.text-lg { font-size: var(--text-lg); }
.text-xl { font-size: var(--text-xl); }
.text-2xl { font-size: var(--text-2xl); }
.text-3xl { font-size: var(--text-3xl); }
.text-4xl { font-size: var(--text-4xl); }
.text-5xl { font-size: var(--text-5xl); }
.text-6xl { font-size: var(--text-6xl); }
.text-7xl { font-size: var(--text-7xl); }

.font-light { font-weight: var(--font-light); }
.font-normal { font-weight: var(--font-normal); }
.font-medium { font-weight: var(--font-medium); }
.font-semibold { font-weight: var(--font-semibold); }
.font-bold { font-weight: var(--font-bold); }
.font-extrabold { font-weight: var(--font-extrabold); }

.leading-none { line-height: var(--leading-none); }
.leading-tight { line-height: var(--leading-tight); }
.leading-normal { line-height: var(--leading-normal); }
.leading-relaxed { line-height: var(--leading-relaxed); }

.text-gradient {
    background: linear-gradient(135deg, var(--color-primary-400), var(--color-secondary-500));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ============================================
   4. COLOR UTILITIES
   ============================================ */

/* Text Colors */
.text-white { color: white; }
.text-muted { color: var(--color-gray-400); }
.text-primary { color: var(--color-primary-500); }
.text-secondary { color: var(--color-secondary-500); }
.text-success { color: var(--color-success-500); }
.text-warning { color: var(--color-warning-500); }
.text-danger { color: var(--color-danger-500); }
.text-info { color: var(--color-info-500); }

/* Background Colors */
.bg-dark { background-color: var(--color-dark-bg); }
.bg-surface { background-color: var(--color-dark-surface); }
.bg-elevated { background-color: var(--color-dark-elevated); }
.bg-primary { background-color: var(--color-primary-500); }
.bg-success { background-color: var(--color-success-500); }
.bg-warning { background-color: var(--color-warning-500); }
.bg-danger { background-color: var(--color-danger-500); }

/* ============================================
   5. LAYOUT & CONTAINER
   ============================================ */

.container {
    width: 100%;
    max-width: var(--container-xl);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--space-4);
    padding-right: var(--space-4);
}

@media (min-width: 768px) {
    .container {
        padding-left: var(--space-6);
        padding-right: var(--space-6);
    }
}

.container--sm { max-width: var(--container-sm); }
.container--md { max-width: var(--container-md); }
.container--lg { max-width: var(--container-lg); }
.container--xl { max-width: var(--container-xl); }
.container--2xl { max-width: var(--container-2xl); }

/* Grid System */
.grid {
    display: grid;
    gap: var(--space-6);
}

.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)); }
.grid-cols-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
.grid-cols-12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }

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

@media (min-width: 1024px) {
    .lg\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .lg\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

/* Flexbox */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-end { justify-content: flex-end; }
.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

/* ============================================
   6. BUTTONS
   ============================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    font-family: var(--font-primary);
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    line-height: 1;
    text-decoration: none;
    border: var(--border-width-2) solid transparent;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-normal);
    white-space: nowrap;
}

.btn:disabled,
.btn.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

/* Primary Button */
.btn--primary {
    background: linear-gradient(135deg, var(--color-primary-500), var(--color-primary-600));
    color: white;
    box-shadow: var(--shadow-md), var(--glow-primary);
}

.btn--primary:hover {
    background: linear-gradient(135deg, var(--color-primary-400), var(--color-primary-500));
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), 0 0 30px rgba(10, 157, 221, 0.4);
}

/* Secondary Button */
.btn--secondary {
    background: transparent;
    color: var(--color-gray-100);
    border-color: var(--color-gray-600);
}

.btn--secondary:hover {
    background: var(--color-gray-800);
    border-color: var(--color-gray-500);
    color: white;
}

/* Ghost Button */
.btn--ghost {
    background: transparent;
    color: var(--color-primary-400);
    border-color: transparent;
}

.btn--ghost:hover {
    background: rgba(10, 157, 221, 0.1);
    color: var(--color-primary-300);
}

/* Danger Button */
.btn--danger {
    background: linear-gradient(135deg, var(--color-danger-500), var(--color-danger-600));
    color: white;
}

.btn--danger:hover {
    background: linear-gradient(135deg, var(--color-danger-400), var(--color-danger-500));
}

/* Success Button */
.btn--success {
    background: linear-gradient(135deg, var(--color-success-500), var(--color-success-600));
    color: white;
}

.btn--success:hover {
    background: linear-gradient(135deg, var(--color-success-400), var(--color-success-500));
}

/* Button Sizes */
.btn--sm {
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-xs);
}

.btn--lg {
    padding: var(--space-4) var(--space-6);
    font-size: var(--text-base);
}

.btn--xl {
    padding: var(--space-5) var(--space-8);
    font-size: var(--text-lg);
}

.btn--full {
    width: 100%;
}

/* Icon Button */
.btn--icon {
    width: 40px;
    height: 40px;
    padding: 0;
    border-radius: var(--radius-lg);
}

.btn--icon.btn--sm {
    width: 32px;
    height: 32px;
}

.btn--icon.btn--lg {
    width: 48px;
    height: 48px;
}

/* ============================================
   7. FORM ELEMENTS
   ============================================ */

.form-group {
    margin-bottom: var(--space-5);
}

.form-label {
    display: block;
    margin-bottom: var(--space-2);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--color-gray-200);
}

.form-label--required::after {
    content: ' *';
    color: var(--color-danger-500);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-family: var(--font-primary);
    font-size: var(--text-base);
    color: var(--color-gray-100);
    background-color: var(--color-dark-elevated);
    border: var(--border-width) solid var(--color-dark-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

.form-input:hover,
.form-select:hover,
.form-textarea:hover {
    border-color: var(--color-gray-500);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary-500);
    box-shadow: 0 0 0 3px rgba(10, 157, 221, 0.2);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--color-gray-500);
}

.form-input--error,
.form-select--error,
.form-textarea--error {
    border-color: var(--color-danger-500);
}

.form-input--error:focus,
.form-textarea--error:focus {
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.2);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 0.75rem center;
    background-repeat: no-repeat;
    background-size: 1.25rem;
    padding-right: 2.5rem;
}

.form-help {
    margin-top: var(--space-2);
    font-size: var(--text-sm);
    color: var(--color-gray-400);
}

.form-error {
    margin-top: var(--space-2);
    font-size: var(--text-sm);
    color: var(--color-danger-500);
}

/* Checkbox & Radio */
.form-check {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
}

.form-check-input {
    width: 18px;
    height: 18px;
    margin-top: 2px;
    flex-shrink: 0;
    accent-color: var(--color-primary-500);
}

.form-check-label {
    font-size: var(--text-sm);
    color: var(--color-gray-300);
}

/* ============================================
   8. CARDS
   ============================================ */

.card {
    background: var(--color-dark-surface);
    border: var(--border-width) solid var(--color-dark-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.card:hover {
    border-color: var(--color-gray-600);
}

.card--elevated {
    background: var(--color-dark-elevated);
}

.card--interactive:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-primary-500);
}

.card__header {
    padding: var(--space-5) var(--space-6);
    border-bottom: var(--border-width) solid var(--color-dark-border);
}

.card__body {
    padding: var(--space-6);
}

.card__footer {
    padding: var(--space-4) var(--space-6);
    border-top: var(--border-width) solid var(--color-dark-border);
    background: rgba(0, 0, 0, 0.2);
}

.card__title {
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    color: var(--color-gray-100);
}

.card__subtitle {
    font-size: var(--text-sm);
    color: var(--color-gray-400);
    margin-top: var(--space-1);
}

/* ============================================
   9. TABLES
   ============================================ */

.table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    border: var(--border-width) solid var(--color-dark-border);
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--text-sm);
}

.table th,
.table td {
    padding: var(--space-3) var(--space-4);
    text-align: left;
    border-bottom: var(--border-width) solid var(--color-dark-border);
}

.table th {
    background: var(--color-dark-elevated);
    font-weight: var(--font-semibold);
    color: var(--color-gray-300);
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.table tbody tr {
    transition: background var(--transition-fast);
}

.table tbody tr:hover {
    background: rgba(255, 255, 255, 0.02);
}

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

/* ============================================
   10. ALERTS & NOTIFICATIONS
   ============================================ */

.alert {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-4);
    border-radius: var(--radius-lg);
    font-size: var(--text-sm);
}

.alert__icon {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
}

.alert__content {
    flex: 1;
}

.alert__title {
    font-weight: var(--font-semibold);
    margin-bottom: var(--space-1);
}

.alert--info {
    background: rgba(59, 130, 246, 0.1);
    border: var(--border-width) solid rgba(59, 130, 246, 0.3);
    color: var(--color-info-100);
}

.alert--success {
    background: rgba(16, 185, 129, 0.1);
    border: var(--border-width) solid rgba(16, 185, 129, 0.3);
    color: var(--color-success-100);
}

.alert--warning {
    background: rgba(245, 158, 11, 0.1);
    border: var(--border-width) solid rgba(245, 158, 11, 0.3);
    color: var(--color-warning-100);
}

.alert--danger {
    background: rgba(239, 68, 68, 0.1);
    border: var(--border-width) solid rgba(239, 68, 68, 0.3);
    color: var(--color-danger-100);
}

/* ============================================
   11. BADGES & TAGS
   ============================================ */

.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-1) var(--space-2);
    font-size: var(--text-xs);
    font-weight: var(--font-medium);
    border-radius: var(--radius-md);
    white-space: nowrap;
}

.badge--primary {
    background: rgba(10, 157, 221, 0.15);
    color: var(--color-primary-400);
}

.badge--success {
    background: rgba(16, 185, 129, 0.15);
    color: var(--color-success-400);
}

.badge--warning {
    background: rgba(245, 158, 11, 0.15);
    color: var(--color-warning-400);
}

.badge--danger {
    background: rgba(239, 68, 68, 0.15);
    color: var(--color-danger-400);
}

.badge--info {
    background: rgba(59, 130, 246, 0.15);
    color: var(--color-info-400);
}

.badge--gray {
    background: rgba(148, 163, 184, 0.15);
    color: var(--color-gray-400);
}

.badge--lg {
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-sm);
}

/* ============================================
   12. MODALS
   ============================================ */

.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    z-index: var(--z-modal-backdrop);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.95);
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    background: var(--color-dark-surface);
    border: var(--border-width) solid var(--color-dark-border);
    border-radius: var(--radius-2xl);
    z-index: var(--z-modal);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    overflow: hidden;
}

.modal.active {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, -50%) scale(1);
}

.modal__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-5) var(--space-6);
    border-bottom: var(--border-width) solid var(--color-dark-border);
}

.modal__title {
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
}

.modal__close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    color: var(--color-gray-400);
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.modal__close:hover {
    background: var(--color-dark-elevated);
    color: var(--color-gray-100);
}

.modal__body {
    padding: var(--space-6);
    overflow-y: auto;
    max-height: calc(90vh - 140px);
}

.modal__footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-6);
    border-top: var(--border-width) solid var(--color-dark-border);
    background: rgba(0, 0, 0, 0.2);
}

.modal--lg {
    max-width: 700px;
}

.modal--xl {
    max-width: 900px;
}

/* ============================================
   13. LOADING STATES
   ============================================ */

.spinner {
    width: 24px;
    height: 24px;
    border: 3px solid var(--color-dark-border);
    border-top-color: var(--color-primary-500);
    border-radius: var(--radius-full);
    animation: spin 0.8s linear infinite;
}

.spinner--sm {
    width: 16px;
    height: 16px;
    border-width: 2px;
}

.spinner--lg {
    width: 40px;
    height: 40px;
    border-width: 4px;
}

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

.skeleton {
    background: linear-gradient(
        90deg,
        var(--color-dark-elevated) 0%,
        var(--color-dark-border) 50%,
        var(--color-dark-elevated) 100%
    );
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s ease infinite;
    border-radius: var(--radius-md);
}

@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* ============================================
   14. EMPTY STATES
   ============================================ */

.empty-state {
    text-align: center;
    padding: var(--space-12) var(--space-6);
}

.empty-state__icon {
    font-size: 3rem;
    color: var(--color-gray-600);
    margin-bottom: var(--space-4);
}

.empty-state__title {
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    color: var(--color-gray-200);
    margin-bottom: var(--space-2);
}

.empty-state__text {
    color: var(--color-gray-400);
    max-width: 400px;
    margin: 0 auto var(--space-6);
}

/* ============================================
   15. UTILITIES
   ============================================ */

/* Display */
.hidden { display: none !important; }
.block { display: block; }
.inline-block { display: inline-block; }

/* Spacing */
.m-0 { margin: 0; }
.m-auto { margin: auto; }
.mt-0 { margin-top: 0; }
.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mb-0 { margin-bottom: 0; }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }
.my-4 { margin-top: var(--space-4); margin-bottom: var(--space-4); }
.my-8 { margin-top: var(--space-8); margin-bottom: var(--space-8); }

.p-0 { padding: 0; }
.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }
.py-4 { padding-top: var(--space-4); padding-bottom: var(--space-4); }
.py-8 { padding-top: var(--space-8); padding-bottom: var(--space-8); }
.py-12 { padding-top: var(--space-12); padding-bottom: var(--space-12); }
.py-16 { padding-top: var(--space-16); padding-bottom: var(--space-16); }
.py-20 { padding-top: var(--space-20); padding-bottom: var(--space-20); }
.px-4 { padding-left: var(--space-4); padding-right: var(--space-4); }
.px-6 { padding-left: var(--space-6); padding-right: var(--space-6); }

/* Text Alignment */
.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }

/* Overflow */
.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }

/* Width / Height */
.w-full { width: 100%; }
.h-full { height: 100%; }
.min-h-screen { min-height: 100vh; }

/* Position */
.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.sticky { position: sticky; }

/* Cursor */
.cursor-pointer { cursor: pointer; }

/* Rounded */
.rounded { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-full { border-radius: var(--radius-full); }

/* Shadow */
.shadow { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }

/* Divider */
.divider {
    height: 1px;
    background: var(--color-dark-border);
    margin: var(--space-6) 0;
}

/* SR Only */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

/* ============================================
   16. RESPONSIVE UTILITIES
   ============================================ */

@media (max-width: 767px) {
    .hide-mobile { display: none !important; }
}

@media (min-width: 768px) {
    .hide-desktop { display: none !important; }
}

@media (max-width: 1023px) {
    .hide-tablet { display: none !important; }
}