/* ==========================================================================
   Ultimate Showcase - Main Stylesheet
   ========================================================================== */

:root {
    /* Colors - Light theme */
    --color-bg: #f8f9fa;
    --color-surface: #ffffff;
    --color-text: #212529;
    --color-text-secondary: #6c757d;
    --color-primary: #4361ee;
    --color-primary-dark: #3a56d4;
    --color-secondary: #7209b7;
    --color-accent: #f72585;
    --color-success: #4cc9f0;
    --color-warning: #f8961e;
    --color-danger: #e63946;
    --color-border: #dee2e6;
    --color-shadow: rgba(0, 0, 0, 0.1);
    --color-glass: rgba(255, 255, 255, 0.2);
    --color-neon: #00ff9d;
    --font-heading: 'Orbitron', sans-serif;
    --font-body: 'Inter', sans-serif;
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --transition: all 0.3s ease;
    --header-height: 80px;
    --container-width: 1200px;
}

[data-theme="dark"] {
    --color-bg: #121212;
    --color-surface: #1e1e1e;
    --color-text: #e9ecef;
    --color-text-secondary: #adb5bd;
    --color-primary: #5a6ff0;
    --color-primary-dark: #4a5fd8;
    --color-secondary: #9d4edd;
    --color-accent: #ff4d8d;
    --color-success: #56cfe1;
    --color-warning: #ffb347;
    --color-danger: #ff6b6b;
    --color-border: #495057;
    --color-shadow: rgba(0, 0, 0, 0.3);
    --color-glass: rgba(30, 30, 30, 0.4);
    --color-neon: #00ff9d;
}

/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    transition: var(--transition);
    overflow-x: hidden;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 {
    font-size: 3rem;
}

h2 {
    font-size: 2.5rem;
}

h3 {
    font-size: 1.8rem;
}

p {
    margin-bottom: 1rem;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--color-accent);
}

/* Header */
.header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 4px 12px var(--color-shadow);
    height: var(--header-height);
    display: flex;
    align-items: center;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo h1 {
    font-size: 1.8rem;
    margin-bottom: 0.2rem;
}

.subtitle {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

/* Navigation */
.main-nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    font-weight: 600;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
}

.nav-link:hover {
    background-color: var(--color-primary);
    color: white;
}

/* Controls */
.controls {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.control-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.control-label {
    font-size: 0.9rem;
    font-weight: 600;
}

select, button {
    font-family: var(--font-body);
    font-size: 0.95rem;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
    background-color: var(--color-surface);
    color: var(--color-text);
    cursor: pointer;
    transition: var(--transition);
}

select:focus, button:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.btn-icon {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.2rem;
}

.btn-text {
    margin-left: 0.5rem;
}

/* Switch */
.switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 26px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--color-border);
    transition: .4s;
    border-radius: 34px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--color-primary);
}

input:checked + .slider:before {
    transform: translateX(24px);
}

/* Sections */
.section {
    padding: 5rem 0;
    border-bottom: 1px solid var(--color-border);
}

.section-title {
    text-align: center;
    margin-bottom: 1.5rem;
    color: var(--color-primary);
}

.section-desc {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 3rem;
    color: var(--color-text-secondary);
    font-size: 1.1rem;
}

/* Hero */
.hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    color: white;
    border-bottom: none;
}

.hero .section-title,
.hero .section-desc {
    color: white;
}

.hero-canvas-container {
    display: flex;
    justify-content: center;
    margin: 3rem 0;
}

#hero-canvas {
    background-color: rgba(0, 0, 0, 0.2);
    border-radius: var(--radius-md);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

/* Buttons */
.btn-primary, .btn-secondary, .btn-warning, .btn-small, .btn-accessible {
    padding: 0.8rem 2rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

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

.btn-primary:hover {
    background-color: var(--color-primary-dark);
    transform: translateY(-3px);
    box-shadow: 0 6px 12px var(--color-shadow);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.btn-secondary:hover {
    background-color: var(--color-primary);
    color: white;
}

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

.btn-small {
    padding: 0.4rem 1rem;
    font-size: 0.9rem;
}

.btn-accessible {
    background-color: var(--color-success);
    color: var(--color-text);
    font-weight: 700;
}

/* Canvas containers */
.canvas-container, .game-container, .visualization, .audio-visual {
    display: flex;
    justify-content: center;
    margin: 2rem 0;
}

canvas {
    border-radius: var(--radius-md);
    box-shadow: 0 8px 24px var(--color-shadow);
    background-color: var(--color-surface);
}

/* Controls within sections */
.visual-controls, .data-controls, .audio-controls {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    margin-bottom: 2rem;
    padding: 1.5rem;
    background-color: var(--color-glass);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}

.slider-group {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.slider-group label {
    font-weight: 600;
    min-width: 120px;
}

input[type="range"] {
    width: 200px;
    height: 8px;
    border-radius: 4px;
    background: var(--color-border);
    outline: none;
    -webkit-appearance: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--color-primary);
    cursor: pointer;
}

/* Game UI */
.game-ui {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    margin-top: 1.5rem;
}

.score, .lives {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-accent);
}

/* UI Cards */
.ui-demos {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.ui-card {
    background-color: var(--color-surface);
    border-radius: var(--radius-md);
    padding: 2rem;
    box-shadow: 0 10px 20px var(--color-shadow);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.ui-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px var(--color-shadow);
}

.ui-card-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.ui-card-header i {
    font-size: 2rem;
    color: var(--color-primary);
}

.glass-box {
    width: 100%;
    height: 100px;
    background: var(--color-glass);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.2);
    margin-top: 1rem;
}

.neon-text {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 900;
    color: var(--color-neon);
    text-align: center;
    text-shadow: 0 0 10px var(--color-neon),
                 0 0 20px var(--color-neon),
                 0 0 30px var(--color-neon);
    margin-top: 1rem;
    animation: neon-pulse 2s infinite alternate;
}

/* UI Features */
.ui-features ul {
    list-style: none;
    padding-left: 0;
}

.ui-features li {
    padding: 0.5rem 0;
    padding-left: 2rem;
    position: relative;
}

.ui-features li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--color-success);
    font-weight: bold;
}

/* Article preview */
.article-preview {
    background-color: var(--color-surface);
    border-radius: var(--radius-lg);
    margin: 3rem auto;
    padding: 3rem;
    max-width: 900px;
    box-shadow: 0 20px 40px var(--color-shadow);
}

.article-excerpt {
    margin-top: 2rem;
    padding: 2rem;
    background-color: var(--color-bg);
    border-radius: var(--radius-md);
    border-left: 5px solid var(--color-primary);
}

/* Footer */
.footer {
    background-color: var(--color-surface);
    border-top: 1px solid var(--color-border);
    padding: 3rem 0 1.5rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-links ul,
.footer-tech ul {
    list-style: none;
    padding-left: 0;
}

.footer-links li,
.footer-tech li {
    margin-bottom: 0.5rem;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

.version {
    display: inline-block;
    margin-left: 1rem;
    padding: 0.2rem 0.8rem;
    background-color: var(--color-primary);
    color: white;
    border-radius: 20px;
    font-size: 0.8rem;
}

/* Responsive */
@media (max-width: 992px) {
    .header .container {
        flex-direction: column;
        height: auto;
        padding: 1rem;
    }
    .main-nav ul {
        flex-wrap: wrap;
        justify-content: center;
        margin: 1rem 0;
    }
    .controls {
        flex-wrap: wrap;
        justify-content: center;
    }
    h1 {
        font-size: 2.5rem;
    }
    h2 {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    .section {
        padding: 3rem 0;
    }
    .visual-controls,
    .data-controls,
    .audio-controls {
        flex-direction: column;
        align-items: stretch;
    }
    .slider-group {
        flex-direction: column;
        align-items: flex-start;
    }
    input[type="range"] {
        width: 100%;
    }
    .ui-demos {
        grid-template-columns: 1fr;
    }
}