:root {
    --bg-primary: #0a0a0a;
    --bg-secondary: #1a1a1a;
    --bg-tertiary: #2a2a2a;
    --text-primary: #ffffff;
    --text-secondary: #b3b3b3;
    --accent-primary: #ff006e;
    --accent-secondary: #8338ec;
    --accent-tertiary: #3a86ff;
    --border-color: #333333;
    --success: #06ffa5;
    --error: #ff4757;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

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

.gradient-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 20% 50%, rgba(255, 0, 110, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(131, 56, 236, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 40% 20%, rgba(58, 134, 255, 0.1) 0%, transparent 50%);
    z-index: -1;
}

.header {
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
    background: rgba(10, 10, 10, 0.8);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
}

.logo i {
    color: #ff0000;
    font-size: 2rem;
}

.nav {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.hero {
    padding: 4rem 0;
    min-height: 80vh;
    display: flex;
    align-items: center;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 1rem;
}

.gradient-text {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.download-form {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    padding: 1.5rem;
    backdrop-filter: blur(10px);
}

.url-input-container {
    position: relative;
    margin-bottom: 1rem;
}

.input-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
}

.url-input {
    width: 100%;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 1rem 1rem 1rem 3rem;
    color: var(--text-primary);
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.url-input:focus {
    outline: none;
    border-color: var(--accent-primary);
}

.clear-btn {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    transition: color 0.3s ease;
}

.clear-btn:hover {
    color: var(--text-primary);
}

.options-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}

.toggle-container {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
}

.toggle-slider {
    position: relative;
    width: 48px;
    height: 24px;
    background: var(--border-color);
    border-radius: 12px;
    transition: background 0.3s ease;
}

.toggle-slider::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 20px;
    height: 20px;
    background: var(--text-primary);
    border-radius: 50%;
    transition: transform 0.3s ease;
}

input[type="checkbox"]:checked + .toggle-slider {
    background: var(--accent-primary);
}

input[type="checkbox"]:checked + .toggle-slider::after {
    transform: translateX(24px);
}

input[type="checkbox"] {
    display: none;
}

.toggle-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.download-btn {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border: none;
    border-radius: 0.5rem;
    padding: 0.75rem 1.5rem;
    color: var(--text-primary);
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(255, 0, 110, 0.3);
}

.loading-spinner {
    text-align: center;
    margin: 2rem 0;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.results-container {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    padding: 1.5rem;
    margin-top: 2rem;
}

.result-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    border-radius: 0.5rem;
    background: var(--bg-tertiary);
    margin-bottom: 1rem;
}

.result-item:last-child {
    margin-bottom: 0;
}

.result-thumbnail {
    width: 80px;
    height: 60px;
    background: var(--border-color);
    border-radius: 0.25rem;
}

.result-info {
    flex: 1;
}

.result-title {
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.result-duration {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.result-download {
    background: var(--accent-primary);
    border: none;
    border-radius: 0.25rem;
    padding: 0.5rem 1rem;
    color: var(--text-primary);
    font-size: 0.875rem;
    cursor: pointer;
    transition: background 0.3s ease;
}

.result-download:hover {
    background: var(--accent-secondary);
}

.hero-visual {
    position: relative;
    height: 400px;
}

.floating-card {
    position: absolute;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    animation: float 6s ease-in-out infinite;
}

.floating-card:nth-child(1) {
    top: 20%;
    left: 10%;
}

.floating-card:nth-child(2) {
    top: 50%;
    right: 20%;
    animation-delay: -2s;
}

.floating-card:nth-child(3) {
    bottom: 20%;
    left: 30%;
    animation-delay: -4s;
}

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

.floating-card span {
    font-size: 0.875rem;
    font-weight: 600;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

.features {
    padding: 4rem 0;
    background: var(--bg-secondary);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 3rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    padding: 2rem;
    text-align: center;
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-primary);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1rem;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.feature-card p {
    color: var(--text-secondary);
}

.howto {
    padding: 4rem 0;
}

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

.step {
    text-align: center;
}

.step-number {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto 1rem;
}

.step h3 {
    margin-bottom: 0.5rem;
}

.step p {
    color: var(--text-secondary);
}

.footer {
    padding: 2rem 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.hidden {
    display: none;
}

@media (max-width: 768px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .options-row {
        flex-direction: column;
        gap: 1rem;
    }
    
    .floating-card {
        display: none;
    }
}