:root {
    /* DEFAULT: Dark Theme */
    --bg-primary: #121212;
    --bg-secondary: #1e1e1e;
    --bg-card: #2c2c2c;
    --text-primary: #ffffff;
    --text-secondary: #b3b3b3;
    --accent-primary: #3b82f6;
    --accent-hover: #2563eb;
    --accent-success: #10b981;
    --border-color: #333333;
    --glow-effect: none;
    --font-heading: 'Inter', sans-serif;
    --font-body: 'Inter', sans-serif;
    --glass-bg: rgba(30, 30, 30, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
}

[data-theme="light"] {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-card: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --accent-primary: #3b82f6;
    --accent-hover: #2563eb;
    --accent-success: #10b981;
    --border-color: #e2e8f0;
    --glow-effect: none;
    --font-heading: 'Inter', sans-serif;
    --font-body: 'Inter', sans-serif;
    --glass-bg: rgba(255, 255, 255, 0.8);
    --glass-border: rgba(0, 0, 0, 0.1);
}

[data-theme="cyberpunk"] {
    --bg-primary: #050511;
    --bg-secondary: #0c0822;
    --bg-card: rgba(20, 10, 45, 0.8);
    --text-primary: #e0f2fe;
    --text-secondary: #bae6fd;
    --accent-primary: #ff00ff; /* Neon Pink */
    --accent-hover: #00ffff; /* Neon Cyan */
    --accent-success: #39ff14; /* Neon Green */
    --border-color: #ff00ff;
    --glow-effect: 0 0 10px var(--accent-primary), 0 0 20px var(--accent-primary), 0 0 40px var(--accent-primary);
    --font-heading: 'Orbitron', sans-serif;
    --font-body: 'Inter', sans-serif;
    --glass-bg: rgba(10, 5, 25, 0.8);
    --glass-border: #00ffff;
    background-image: 
        linear-gradient(rgba(5, 5, 17, 0.9), rgba(5, 5, 17, 0.9)),
        repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(0,255,255,0.1) 2px, rgba(0,255,255,0.1) 4px);
    background-attachment: fixed;
}

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

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-body);
    line-height: 1.6;
    transition: background-color 0.4s ease, color 0.4s ease;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

h1, h2, h3, h4 {
    font-family: var(--font-heading);
    margin-bottom: 1rem;
    font-weight: 700;
}

a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: all 0.3s ease;
}

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

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* --- Navigation --- */
.navbar {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--glass-border);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 1rem 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-primary);
    text-decoration: none;
    font-family: var(--font-heading);
}
.logo-icon {
    width: 32px;
    height: 32px;
    color: var(--accent-primary);
}

.nav-links {
    display: flex;
    gap: 20px;
}

.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
}

.nav-links a:hover, .nav-links a.active {
    color: var(--accent-primary);
}

.theme-switcher {
    display: flex;
    gap: 10px;
    background: var(--bg-secondary);
    padding: 5px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
}

.theme-btn {
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 1.2rem;
    padding: 5px;
    border-radius: 50%;
    transition: transform 0.2s, background-color 0.2s;
    width: 35px;
    height: 35px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-btn.active {
    background: var(--bg-card);
    transform: scale(1.1);
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

[data-theme="cyberpunk"] .cyberpunk-btn {
    text-shadow: var(--glow-effect);
}

.mobile-menu-btn {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* --- Hero & Converter Section --- */
.main-content {
    flex: 1;
}

.hero {
    text-align: center;
    padding: 80px 20px;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 15px;
    color: var(--text-primary);
}

[data-theme="cyberpunk"] .hero h1 {
    color: var(--accent-hover);
    text-shadow: 0 0 10px var(--accent-hover);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.converter-box {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 40px;
    max-width: 800px;
    margin: 0 auto;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

[data-theme="cyberpunk"] .converter-box {
    box-shadow: var(--glow-effect);
    border: 2px solid var(--accent-hover);
    background: rgba(10, 5, 20, 0.85);
    backdrop-filter: blur(5px);
}

.input-group {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

input[type="url"], input[type="text"], input[type="email"], textarea {
    flex: 1;
    min-width: 250px;
    padding: 15px 20px;
    border-radius: 8px;
    border: 2px solid var(--border-color);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 1rem;
    outline: none;
    transition: all 0.3s;
    font-family: var(--font-body);
}

input[type="url"]:focus, input[type="text"]:focus, input[type="email"]:focus, textarea:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

[data-theme="cyberpunk"] input:focus {
    box-shadow: 0 0 15px var(--accent-primary);
}

.btn-primary {
    background: var(--accent-primary);
    color: #fff;
    border: none;
    padding: 15px 30px;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: var(--font-heading);
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
}

[data-theme="cyberpunk"] .btn-primary {
    background: transparent;
    border: 2px solid var(--accent-primary);
    color: var(--accent-primary);
    text-transform: uppercase;
    box-shadow: 0 0 10px var(--accent-primary) inset, 0 0 10px var(--accent-primary);
}
[data-theme="cyberpunk"] .btn-primary:hover {
    background: var(--accent-primary);
    color: #000;
    box-shadow: 0 0 20px var(--accent-primary) inset, 0 0 20px var(--accent-primary);
}

/* --- Status & Result --- */
.hidden {
    display: none !important;
}

.status-container {
    margin-top: 30px;
    text-align: center;
}

.loader {
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--accent-primary);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto 15px auto;
}

[data-theme="cyberpunk"] .loader {
    border-top-color: var(--accent-hover);
    box-shadow: 0 0 15px var(--accent-hover);
}

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

.result-card {
    margin-top: 30px;
    display: flex;
    gap: 20px;
    align-items: center;
    background: var(--bg-secondary);
    padding: 20px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    text-align: left;
}

.thumbnail img {
    width: 120px;
    height: auto;
    border-radius: 8px;
}

.result-details {
    flex: 1;
}

.result-details h3 {
    margin-bottom: 10px;
    font-size: 1.2rem;
}

.btn-success {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--accent-success);
    color: #fff;
    padding: 10px 20px;
    border-radius: 8px;
    font-weight: 600;
}

.btn-success:hover {
    filter: brightness(1.1);
}

[data-theme="cyberpunk"] .btn-success {
    background: transparent;
    border: 2px solid var(--accent-success);
    color: var(--accent-success);
    box-shadow: 0 0 10px var(--accent-success) inset, 0 0 10px var(--accent-success);
}
[data-theme="cyberpunk"] .btn-success:hover {
    background: var(--accent-success);
    color: #000;
}


/* --- Cyberpunk Game Zone --- */
#cyberpunk-game-zone {
    margin: 40px auto;
    background: rgba(0, 0, 0, 0.8);
    border: 2px solid #00ffff;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 0 20px #00ffff;
}

[data-theme="light"] #cyberpunk-game-zone,
[data-theme="dark"] #cyberpunk-game-zone {
    display: none !important;
}

.game-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    font-family: 'Orbitron', sans-serif;
    color: #00ffff;
}

.game-container {
    position: relative;
    width: 100%;
    overflow: hidden;
    background: #050511;
    border: 1px solid #ff00ff;
    border-radius: 4px;
}

#game-canvas {
    display: block;
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
}

.game-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ff00ff;
    font-family: 'Orbitron', sans-serif;
    text-shadow: 0 0 10px #ff00ff;
}

/* --- Features Section --- */
.features {
    padding: 60px 20px;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--bg-card);
    padding: 30px;
    border-radius: 12px;
    text-align: center;
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
}

[data-theme="cyberpunk"] .feature-card {
    border-color: rgba(0, 255, 255, 0.3);
}
[data-theme="cyberpunk"] .feature-card:hover {
    box-shadow: 0 0 15px rgba(0,255,255,0.4);
    border-color: #00ffff;
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

/* --- Page Content (About, Contact, Legal) --- */
.page-header {
    text-align: center;
    padding: 60px 20px 40px;
}

.page-header h1 {
    font-size: 2.5rem;
    color: var(--text-primary);
}

[data-theme="cyberpunk"] .page-header h1 {
    color: #ff00ff;
    text-shadow: 0 0 10px #ff00ff;
}

.page-content {
    background: var(--bg-card);
    padding: 40px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    margin-bottom: 60px;
}

.page-content h2 {
    margin-top: 30px;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
}

.page-content h3 {
    margin-top: 25px;
    color: var(--text-secondary);
}

.page-content p, .page-content ul, .page-content ol {
    margin-bottom: 20px;
}

.page-content ul, .page-content ol {
    padding-left: 20px;
}

/* --- Contact Form --- */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-bottom: 60px;
}

.contact-form-card {
    background: var(--bg-card);
    padding: 40px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
}

/* --- Footer --- */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 40px 0;
    margin-top: auto;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 20px;
}

.footer-links {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    justify-content: center;
}

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

/* --- Responsive --- */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    .mobile-menu-btn {
        display: block;
    }
    .hero h1 {
        font-size: 2rem;
    }
    .contact-grid {
        grid-template-columns: 1fr;
    }
    .result-card {
        flex-direction: column;
        text-align: center;
    }
    .input-group {
        flex-direction: column;
    }
    .btn-primary {
        width: 100%;
    }
}