/* Base styles and global resets */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* CSS Custom Properties for consistent theming */
:root {
    --primary-color: #ffd700;
    --primary-color-alpha: rgba(255, 215, 0, 0.2);
    --background-gradient: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    --background-dark: linear-gradient(135deg, #0f1419 0%, #1a1f2e 100%);
    --glass-bg: rgba(0, 0, 0, 0.3);
    --glass-border: rgba(255, 255, 255, 0.1);
    --text-primary: white;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --success-color: #00ff00;
    --error-color: #ff6b6b;
    --warning-color: #ffd700;
    
    /* Spacing system */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 12px;
    --spacing-lg: 16px;
    --spacing-xl: 20px;
    --spacing-2xl: 24px;
    --spacing-3xl: 32px;
    
    /* Border radius system */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 10px;
    --radius-xl: 15px;
    --radius-full: 50%;
    
    /* Transition system */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Z-index system */
    --z-dropdown: 100;
    --z-sticky: 200;
    --z-fixed: 300;
    --z-modal-backdrop: 999;
    --z-modal: 1000;
    --z-popover: 1100;
    --z-tooltip: 1200;
    --z-toast: 1300;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--background-gradient);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Improved container with better mobile handling */
.container {
    display: flex;
    min-height: 100vh;
    position: relative;
    width: 100%;
    max-width: 100vw;
}

/* Status and loading components */
.status {
    position: fixed;
    top: var(--spacing-xl);
    right: var(--spacing-xl);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-xl);
    font-weight: 600;
    z-index: var(--z-toast);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    max-width: 400px;
    display: none;
    font-size: 14px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    transition: all var(--transition-normal);
}

.status.success {
    background: rgba(0, 255, 0, 0.15);
    color: var(--success-color);
    border-color: var(--success-color);
}

.status.error {
    background: rgba(255, 107, 107, 0.15);
    color: var(--error-color);
    border-color: var(--error-color);
}

.status.loading {
    background: rgba(255, 215, 0, 0.15);
    color: var(--warning-color);
    border-color: var(--warning-color);
}

.loading-spinner {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: var(--z-modal);
    display: none;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(255, 255, 255, 0.2);
    border-top: 4px solid var(--primary-color);
    border-radius: var(--radius-full);
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Enhanced button styles */
.btn-small {
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: var(--radius-xl);
    cursor: pointer;
    font-size: 12px;
    font-weight: 600;
    transition: all var(--transition-normal);
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    min-height: 32px;
    white-space: nowrap;
}

.btn-small:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

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

/* Enhanced scrollbar styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color-alpha);
    border-radius: var(--radius-sm);
    transition: background var(--transition-normal);
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 215, 0, 0.4);
}

::-webkit-scrollbar-corner {
    background: transparent;
}

/* Enhanced focus styles for accessibility */
.btn-small:focus,
.search-input:focus,
.category-item:focus,
.channel-guide-row:focus,
.collapse-toggle:focus,
.video-minimize-btn:focus,
button:focus,
input:focus,
select:focus,
textarea:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Focus visible for better keyboard navigation */
.btn-small:focus-visible,
.search-input:focus-visible,
.category-item:focus-visible,
.channel-guide-row:focus-visible,
.collapse-toggle:focus-visible,
.video-minimize-btn:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Remove focus outline for mouse users */
.btn-small:focus:not(:focus-visible),
.search-input:focus:not(:focus-visible),
.category-item:focus:not(:focus-visible),
.channel-guide-row:focus:not(:focus-visible),
.collapse-toggle:focus:not(:focus-visible),
.video-minimize-btn:focus:not(:focus-visible) {
    outline: none;
}

/* Improved mobile responsiveness */
@media (max-width: 768px) {
    .status {
        top: 70px;
        right: var(--spacing-md);
        left: var(--spacing-md);
        max-width: none;
        font-size: 13px;
        padding: var(--spacing-md) var(--spacing-lg);
    }
    
    .btn-small {
        font-size: 11px;
        padding: var(--spacing-xs) var(--spacing-sm);
        min-height: 28px;
    }
    
    .spinner {
        width: 40px;
        height: 40px;
        border-width: 3px;
    }
}

@media (max-width: 480px) {
    .status {
        font-size: 12px;
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .btn-small {
        font-size: 10px;
        padding: var(--spacing-xs) var(--spacing-sm);
        min-height: 24px;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    
    .spinner {
        animation: none;
    }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    body {
        background: var(--background-dark);
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --glass-bg: rgba(0, 0, 0, 0.8);
        --glass-border: rgba(255, 255, 255, 0.3);
    }
    
    .btn-small {
        border-width: 2px;
    }
}

/* Print styles */
@media print {
    .sidebar-container,
    .video-container,
    .status,
    .loading-spinner,
    .btn-small {
        display: none !important;
    }
    
    .main-content {
        width: 100% !important;
    }
    
    .tv-guide-container {
        background: white !important;
        color: black !important;
    }
    
    body {
        background: white !important;
        color: black !important;
    }
}

/* Utility classes for common patterns */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.glass-effect {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
}

.text-truncate {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

.flex-between {
    display: flex;
    align-items: center;
    justify-content: space-between;
}