:root {
    /* Premium Glassmorphism Variables */
    --bg-color: #f3f4f6;
    --text-color: #1f2937;
    --text-muted: #6b7280;
    --card-bg: rgba(255, 255, 255, 0.4);
    --card-border: rgba(255, 255, 255, 0.6);
    --card-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.07);
    --primary: #8b5cf6;
    --primary-hover: #7c3aed;
    --secondary: #ec4899;
    --input-bg: rgba(255, 255, 255, 0.6);
    --input-border: rgba(255, 255, 255, 0.8);
    --footer-bg: rgba(255, 255, 255, 0.3);
    --glass-blur: blur(12px);
    --radius: 20px;
}

[data-theme="dark"] {
    --bg-color: #0f172a;
    --text-color: #f8fafc;
    --text-muted: #94a3b8;
    --card-bg: rgba(30, 41, 59, 0.4);
    --card-border: rgba(255, 255, 255, 0.05);
    --card-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
    --primary: #a78bfa;
    --primary-hover: #8b5cf6;
    --secondary: #f472b6;
    --input-bg: rgba(15, 23, 42, 0.6);
    --input-border: rgba(255, 255, 255, 0.1);
    --footer-bg: rgba(15, 23, 42, 0.4);
}

body {
    margin: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.4s ease, color 0.4s ease;
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Animated Mesh Gradient Background */
.bg-gradient {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    z-index: -1;
    background: radial-gradient(circle at 15% 50%, rgba(139, 92, 246, 0.15), transparent 50%),
                radial-gradient(circle at 85% 30%, rgba(236, 72, 153, 0.15), transparent 50%),
                radial-gradient(circle at 50% 80%, rgba(56, 189, 248, 0.15), transparent 50%);
    animation: gradientShift 20s ease-in-out infinite alternate;
}
@keyframes gradientShift {
    0% { transform: scale(1); }
    100% { transform: scale(1.1); }
}

/* Glassmorphism Utilities */
.glass {
    background: var(--card-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--card-border);
    box-shadow: var(--card-shadow);
    border-radius: var(--radius);
}

/* Navbar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 5%;
    background: var(--card-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--card-border);
    position: sticky;
    top: 0;
    z-index: 100;
}
.navbar .logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 800;
    text-decoration: none;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.5px;
}
.nav-links {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}
.nav-links a {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--text-color);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: color 0.3s, transform 0.3s;
}
.nav-links a:hover {
    color: var(--primary);
    transform: translateY(-2px);
}
.nav-links svg {
    width: 18px; height: 18px;
    fill: currentColor;
}

/* Mobile Menu Toggle (Hidden by default) */
.menu-toggle {
    display: none;
    cursor: pointer;
    font-size: 1.5rem;
    color: var(--text-color);
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 6rem 20px 4rem 20px;
    max-width: 900px;
    margin: 0 auto;
}
.hero-badge {
    display: inline-block;
    padding: 6px 16px;
    border-radius: 50px;
    background: rgba(139, 92, 246, 0.1);
    color: var(--primary);
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
    border: 1px solid rgba(139, 92, 246, 0.2);
}
.hero h1 {
    font-size: 3.5rem;
    margin: 0 0 1.5rem 0;
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -1px;
}
.hero h1 span {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.hero p {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 650px;
    margin: 0 auto 3rem auto;
}

/* Downloader Form */
.downloader-box {
    padding: 2.5rem;
    max-width: 750px;
    margin: 0 auto;
    position: relative;
    z-index: 10;
}
.input-group {
    display: flex;
    gap: 12px;
    position: relative;
}
.input-group svg {
    position: absolute;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    width: 22px; height: 22px;
}
.input-group input {
    flex: 1;
    padding: 20px 20px 20px 54px;
    border-radius: 16px;
    border: 2px solid var(--input-border);
    background: var(--input-bg);
    color: var(--text-color);
    font-size: 1.1rem;
    outline: none;
    transition: all 0.3s ease;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.02);
}
.input-group input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(139, 92, 246, 0.15);
    background: var(--card-bg);
}
.btn-primary {
    padding: 0 32px;
    border-radius: 16px;
    border: none;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 4px 15px rgba(139, 92, 246, 0.3);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(139, 92, 246, 0.4);
}

/* Results Area */
#result {
    margin-top: 2rem;
}
.video-card {
    display: flex;
    gap: 24px;
    padding: 24px;
    align-items: flex-start;
    animation: slideUp 0.5s ease-out;
}
@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}
.video-card img {
    width: 220px;
    border-radius: 12px;
    object-fit: cover;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}
.video-info {
    flex: 1;
}
.video-info h3 {
    margin: 0 0 1rem 0;
    font-size: 1.25rem;
    line-height: 1.4;
}
.download-links {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}
.btn-download {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: var(--primary);
    color: white;
    text-decoration: none;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.2s;
    box-shadow: 0 4px 10px rgba(139, 92, 246, 0.2);
}
.btn-download:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
}
.btn-download.audio {
    background: var(--secondary);
    box-shadow: 0 4px 10px rgba(236, 72, 153, 0.2);
}
.btn-download.audio:hover {
    background: #db2777;
}

/* Features Section */
.features-section {
    padding: 4rem 5%;
    max-width: 1200px;
    margin: 0 auto;
}
.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    font-weight: 800;
}
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}
.feature-card {
    padding: 2rem;
    text-align: center;
    transition: transform 0.3s;
}
.feature-card:hover {
    transform: translateY(-5px);
}
.feature-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 1.5rem auto;
    background: linear-gradient(135deg, rgba(139,92,246,0.1), rgba(236,72,153,0.1));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
}
.feature-icon svg {
    width: 32px; height: 32px;
}
.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}
.feature-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Instructions / How to Use */
.steps-section {
    padding: 4rem 5%;
    background: rgba(0,0,0,0.02);
}
.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
    counter-reset: step;
}
.step-card {
    position: relative;
    padding: 2rem;
}
.step-card::before {
    counter-increment: step;
    content: counter(step);
    position: absolute;
    top: -20px;
    left: 20px;
    width: 40px; height: 40px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.2rem;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

/* FAQ Section */
.faq-section {
    max-width: 800px;
    margin: 4rem auto;
    padding: 0 20px;
}
.faq-item {
    margin-bottom: 1rem;
    padding: 1.5rem;
    transition: transform 0.2s;
}
.faq-item:hover {
    transform: scale(1.01);
}
.faq-item h4 {
    margin: 0 0 0.5rem 0;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 10px;
}
.faq-item h4::before {
    content: '';
    width: 8px; height: 8px;
    background: var(--secondary);
    border-radius: 50%;
}
.faq-item p {
    margin: 0;
    color: var(--text-muted);
    padding-left: 18px;
}

/* Content Sections (SEO Pages like About) */
.content-section {
    max-width: 800px;
    margin: 4rem auto;
    padding: 3rem;
}
.content-section h1, .content-section h2 {
    color: var(--primary);
    margin-bottom: 1.5rem;
}
.content-section p {
    color: var(--text-muted);
    font-size: 1.05rem;
    margin-bottom: 1.5rem;
}

/* Ads Area */
.ad-slot {
    margin: 2rem auto;
    text-align: center;
    min-height: 90px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0,0,0,0.02);
    border-radius: var(--radius);
    overflow: hidden;
}

/* Footer */
footer {
    background: var(--footer-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: 3rem 20px;
    text-align: center;
    border-top: 1px solid var(--card-border);
    margin-top: auto;
}
.footer-links {
    margin-bottom: 1.5rem;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
}
.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.2s;
}
.footer-links a:hover {
    color: var(--primary);
}
.copyright {
    color: var(--text-muted);
    font-size: 0.9rem;
    max-width: 600px;
    margin: 0 auto;
}

/* Loader */
.loader-container {
    text-align: center;
    padding: 2rem 0;
}
.loader {
    width: 48px;
    height: 48px;
    border: 4px solid var(--card-border);
    border-bottom-color: var(--primary);
    border-radius: 50%;
    display: inline-block;
    box-sizing: border-box;
    animation: rotation 1s linear infinite;
    margin-bottom: 1rem;
}
@keyframes rotation {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Responsive Design */
@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        gap: 1rem;
    }
    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
    }
    .hero h1 {
        font-size: 2.5rem;
    }
    .input-group {
        flex-direction: column;
    }
    .input-group svg {
        top: 28px;
    }
    .btn-primary {
        padding: 16px;
        justify-content: center;
    }
    .video-card {
        flex-direction: column;
    }
    .video-card img {
        width: 100%;
        height: 200px;
    }
    .downloader-box {
        padding: 1.5rem;
    }
}