/**
 * GammaTV - Design System
 * Netflix-inspired Black + Yellow theme
 */

:root {
    /* Colors - Primary */
    --bg-primary: #000000;
    --bg-secondary: #121212;
    --bg-tertiary: #1a1a1a;
    --bg-card: #1a1a1a;
    --bg-hover: #2a2a2a;
    --bg-active: #333333;

    /* Colors - Accent */
    --accent: #FFD300;
    --accent-hover: #ffdd33;
    --accent-active: #ffc800;
    --accent-light: #fff066;
    --accent-dark: #ccaa00;

    /* Colors - Text */
    --text-primary: #FFFFFF;
    --text-secondary: #999999;
    --text-muted: #666666;
    --text-disabled: #444444;
    --text-inverse: #000000;

    /* Colors - Status */
    --danger: #d32f2f;
    --danger-hover: #c62828;
    --danger-light: #ef5350;
    --success: #4CAF50;
    --success-hover: #43a047;
    --success-light: #66bb6a;
    --warning: #ff9800;
    --warning-hover: #f57c00;
    --warning-light: #ffb74d;
    --info: #2196F3;
    --info-hover: #1976d2;
    --info-light: #64b5f6;

    /* Colors - Borders */
    --border-color: #333333;
    --border-color-hover: #444444;
    --border-color-focus: var(--accent);
    --border-color-error: var(--danger);

    /* Spacing - Complete Scale */
    --spacing-0: 0;
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 12px;
    --spacing-lg: 16px;
    --spacing-xl: 24px;
    --spacing-2xl: 32px;
    --spacing-3xl: 48px;
    --spacing-4xl: 64px;
    --spacing-5xl: 96px;

    /* Typography - Font Family */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-family-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, monospace;
    --font-family-heading: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;

    /* Typography - Font Sizes */
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-base: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 20px;
    --font-size-2xl: 24px;
    --font-size-3xl: 30px;
    --font-size-4xl: 36px;
    --font-size-5xl: 48px;

    /* Typography - Font Weights */
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;

    /* Typography - Line Heights */
    --line-height-tight: 1.2;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;
    --line-height-loose: 2;

    /* Typography - Letter Spacing */
    --letter-spacing-tight: -0.025em;
    --letter-spacing-normal: 0;
    --letter-spacing-wide: 0.025em;
    --letter-spacing-wider: 0.05em;

    /* Border Radius - Complete Scale */
    --radius-none: 0;
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --radius-xl: 12px;
    --radius-2xl: 16px;
    --radius-3xl: 24px;
    --radius-full: 9999px;

    /* Border Width */
    --border-width-0: 0;
    --border-width-1: 1px;
    --border-width-2: 2px;
    --border-width-4: 4px;

    /* Shadows - Complete Scale */
    --shadow-none: none;
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 12px 24px rgba(0, 0, 0, 0.6);
    --shadow-2xl: 0 16px 32px rgba(0, 0, 0, 0.7);
    --shadow-inner: inset 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-focus: 0 0 0 4px rgba(255, 211, 0, 0.18);
    --shadow-focus-error: 0 0 0 4px rgba(211, 47, 47, 0.18);

    /* Transitions - Timing */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
    --transition-slower: 500ms ease;

    /* Transitions - Properties */
    --transition-all: all var(--transition-base);
    --transition-colors: color var(--transition-base), background-color var(--transition-base), border-color var(--transition-base);
    --transition-opacity: opacity var(--transition-base);
    --transition-transform: transform var(--transition-base);
    --transition-shadow: box-shadow var(--transition-base);

    /* Z-Index Scale */
    --z-base: 0;
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
    --z-toast: 1080;

    /* Breakpoints (for JS/media queries) */
    --breakpoint-xs: 0px;
    --breakpoint-sm: 640px;
    --breakpoint-md: 768px;
    --breakpoint-lg: 1024px;
    --breakpoint-xl: 1280px;
    --breakpoint-2xl: 1536px;

    /* Animation Durations */
    --animation-duration-fast: 150ms;
    --animation-duration-base: 200ms;
    --animation-duration-slow: 300ms;
    --animation-duration-slower: 500ms;

    /* Animation Easing */
    --easing-linear: linear;
    --easing-ease-in: ease-in;
    --easing-ease-out: ease-out;
    --easing-ease-in-out: ease-in-out;

    /* Opacity Scale */
    --opacity-0: 0;
    --opacity-25: 0.25;
    --opacity-50: 0.5;
    --opacity-75: 0.75;
    --opacity-100: 1;

    /* Theme Variables */
    --theme-primary: var(--accent);
    --theme-secondary: var(--bg-secondary);
    --theme-background: var(--bg-primary);
    --theme-surface: var(--bg-card);
    --theme-text: var(--text-primary);
    --theme-text-secondary: var(--text-secondary);

    /* Accessibility */
    --min-touch-target: 44px;
    --min-touch-target-large: 48px;
    --focus-ring-color: var(--accent);
    --focus-ring-offset: 2px;
    --focus-ring-width: 2px;

    color-scheme: dark;
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        /* Dark mode is default, but can be enhanced */
    }
}

/* Light Mode (if needed) */
[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f5f5f5;
    --bg-card: #ffffff;
    --text-primary: #000000;
    --text-secondary: #666666;
    --border-color: #e0e0e0;
}

/* Print Styles */
@media print {
    :root {
        --bg-primary: #ffffff;
        --bg-card: #ffffff;
        --text-primary: #000000;
        --shadow-md: none;
        --shadow-lg: none;
    }

    .no-print {
        display: none !important;
    }
}

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

html {
    color-scheme: dark;
}

body {
    font-family: var(--font-family);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md) var(--spacing-lg);
    min-height: 44px;
    font-size: var(--font-size-base);
    font-weight: 600;
    border: none;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
}

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

.btn-primary:hover:not(:disabled) {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid #333;
}

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

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

.btn:focus-visible {
    outline: none;
    box-shadow: var(--shadow-focus);
}

/* Forms */
.form-group {
    margin-bottom: var(--spacing-lg);
}

label {
    display: block;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="date"],
input[type="time"],
input[type="datetime-local"],
input[type="url"],
input[type="tel"],
select,
textarea {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    background: linear-gradient(135deg, rgba(26, 26, 26, 0.8) 0%, rgba(18, 18, 18, 0.9) 100%);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 211, 0, 0.2);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    transition: all var(--transition-base);
    box-sizing: border-box;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    cursor: pointer;
    color-scheme: dark;
    /* Force dark mode for native dropdowns */
}

select option {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    padding: var(--spacing-md);
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
input[type="number"]:focus,
input[type="date"]:focus,
input[type="time"]:focus,
input[type="datetime-local"]:focus,
input[type="url"]:focus,
input[type="tel"]:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(255, 211, 0, 0.15), 0 4px 12px rgba(0, 0, 0, 0.3);
    transform: translateY(-1px);
}

input[type="text"]:hover,
input[type="email"]:hover,
input[type="password"]:hover,
input[type="number"]:hover,
input[type="date"]:hover,
input[type="time"]:hover,
input[type="datetime-local"]:hover,
input[type="url"]:hover,
input[type="tel"]:hover,
select:hover,
textarea:hover {
    border-color: rgba(255, 211, 0, 0.3);
}

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

input:invalid {
    border-color: var(--danger);
}

.error-message {
    color: var(--danger);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-xs);
}

/* Cards */
.card {
    background: linear-gradient(135deg, rgba(26, 26, 26, 0.8) 0%, rgba(18, 18, 18, 0.9) 100%);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid rgba(255, 211, 0, 0.1);
    width: 100%;
    box-sizing: border-box;
    max-width: 100%;
    overflow-x: hidden;
    transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(255, 211, 0, 0.2);
}

.card-header {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid rgba(255, 211, 0, 0.15);
    background: linear-gradient(135deg, rgba(255, 211, 0, 0.05) 0%, transparent 100%);
    margin: calc(var(--spacing-xl) * -1) calc(var(--spacing-xl) * -1) var(--spacing-lg);
    padding: var(--spacing-lg) var(--spacing-xl);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.card-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
}

/* Tables */
.table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-card);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.table th,
.table td {
    padding: var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid #333;
}

.table th {
    background: var(--bg-secondary);
    font-weight: 600;
    color: var(--text-primary);
}

.table tr:hover {
    background: var(--bg-secondary);
}

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: var(--spacing-xl);
}

.modal {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    max-width: 900px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
}

.modal-header {
    padding: var(--spacing-xl);
    border-bottom: 1px solid #333;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-body {
    padding: var(--spacing-xl);
}

.modal-footer {
    padding: var(--spacing-xl);
    border-top: 1px solid #333;
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-md);
}

/* Loading */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 211, 0, 0.3);
    border-radius: 50%;
    border-top-color: var(--accent);
    animation: spin 0.8s linear infinite;
}

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

/* Responsive */
@media (max-width: 768px) {
    .modal {
        max-width: 100%;
        margin: var(--spacing-md);
    }

    .table {
        font-size: var(--font-size-sm);
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus visible for keyboard navigation */
*:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}