/* ============================================
   Visualizers - Shared Base Styles
   Common design system for all visualizers
   ============================================ */

:root {
    /* Background Colors - Dark Theme */
    --bg-primary: #171C17;
    --bg-surface: #1E241E;
    --bg-surface-light: #282F28;
    --border-color: #3D4A3D;

    /* Text Colors - Warm Cream */
    --text-primary: #FAF6F0;
    --text-secondary: #B5AFA5;
    --text-muted: #7A756C;

    /* Semantic Colors */
    --color-success: #7B9E7B;
    --color-warning: #D4A855;
    --color-error: #C2785C;
    --color-danger: #E57373;
    --color-danger-dark: #C62828;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;

    /* Shadows */
    --shadow-sm: 0 2px 4px 0 rgba(23, 28, 23, 0.25);
    --shadow-md: 0 4px 12px -2px rgba(23, 28, 23, 0.35);
    --shadow-lg: 0 8px 24px -4px rgba(23, 28, 23, 0.4);
    --shadow-xl: 0 16px 40px -8px rgba(23, 28, 23, 0.5);

    /* Transitions */
    --transition-fast: 200ms cubic-bezier(0.34, 1.56, 0.64, 1);
    --transition-base: 350ms cubic-bezier(0.22, 1, 0.36, 1);
    --transition-slow: 500ms cubic-bezier(0.22, 1, 0.36, 1);

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', Monaco, Consolas, monospace;
}

/* ============================================
   Reset & Base Styles
   ============================================ */

* {
    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);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* ============================================
   Typography
   ============================================ */

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    color: var(--text-primary);
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.125rem; }

p {
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
}

code {
    font-family: var(--font-mono);
    background-color: var(--bg-surface-light);
    padding: 0.125rem 0.375rem;
    border-radius: var(--radius-sm);
    font-size: 0.875em;
}

/* ============================================
   Utility Classes
   ============================================ */

.hidden {
    display: none !important;
}

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

/* ============================================
   Animations
   ============================================ */

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

@keyframes glow {
    0%, 100% { filter: drop-shadow(0 0 8px currentColor); }
    50% { filter: drop-shadow(0 0 16px currentColor); }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideInRight {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

@keyframes slideOutRight {
    from { transform: translateX(0); opacity: 1; }
    to { transform: translateX(100%); opacity: 0; }
}

.animate-pulse {
    animation: pulse 2s ease-in-out infinite;
}

.animate-fade-in {
    animation: fadeIn var(--transition-base) ease-out;
}

/* ============================================
   Scrollbar Styling
   ============================================ */

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-surface);
}

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

::-webkit-scrollbar-thumb:hover {
    background: var(--bg-surface-light);
}

/* ============================================
   Common Component Styles
   ============================================ */

/* Navbar Base */
.viz-navbar {
    background-color: var(--bg-surface) !important;
    border-bottom: 1px solid var(--border-color);
    padding: 0.75rem 0;
    box-shadow: var(--shadow-sm);
}

.viz-menu-btn {
    border-color: var(--border-color) !important;
    color: var(--text-secondary) !important;
    padding: 0.5rem;
}

.viz-menu-btn:hover,
.viz-menu-btn:focus {
    background-color: var(--bg-surface-light) !important;
    border-color: var(--border-color) !important;
    color: var(--text-primary) !important;
}

/* Sidebar Base */
.viz-sidebar {
    background-color: var(--bg-surface);
    border-right: 1px solid var(--border-color);
    height: calc(100vh - 58px);
    overflow-y: auto;
    position: sticky;
    top: 58px;
}

/* Main Content Area */
.viz-main {
    min-height: calc(100vh - 58px);
    display: flex;
    flex-direction: column;
    background-color: var(--bg-primary);
    position: relative;
}

.viz-scene-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    background-color: var(--bg-surface);
}

/* Canvas Container */
.viz-canvas-container {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
    position: relative;
}

#canvas {
    width: 100%;
    max-width: 1200px;
    height: auto;
    background-color: var(--bg-primary);
    border-radius: var(--radius-lg);
}

/* Floating Controls */
.viz-controls {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: rgba(30, 36, 30, 0.95);
    backdrop-filter: blur(12px);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    z-index: 100;
}

.viz-control-btn {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    border: none;
    background-color: var(--bg-surface-light);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.viz-control-btn:hover {
    background-color: var(--bg-surface);
    transform: scale(1.05);
}

.viz-control-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* Speed Control */
.viz-speed-control {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 0 var(--spacing-sm);
}

.viz-speed-slider {
    width: 80px;
    height: 4px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--border-color);
    border-radius: 2px;
    outline: none;
}

.viz-speed-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.viz-speed-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.viz-speed-slider::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    cursor: pointer;
    border: none;
}

/* SVG Text Styles */
.svg-label {
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 600;
    fill: var(--text-primary);
}

.svg-sublabel {
    font-family: var(--font-sans);
    font-size: 11px;
    fill: var(--text-secondary);
}

/* Lesson Items */
.viz-lesson-item {
    display: grid;
    grid-template-columns: 36px 1fr;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    border-left: 3px solid transparent;
    cursor: pointer;
    transition: all var(--transition-base);
}

.viz-lesson-item:hover {
    background-color: var(--bg-surface-light);
}

.lesson-number {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background-color: var(--bg-surface-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
}

/* Responsive */
@media (max-width: 991.98px) {
    .viz-controls {
        bottom: var(--spacing-md);
        padding: var(--spacing-xs) var(--spacing-sm);
    }

    .viz-control-btn {
        width: 40px;
        height: 40px;
    }

    .viz-speed-slider {
        width: 60px;
    }
}