:root {
    --primary: #1877f2;
    --primary-dark: #166fe5;
    --success: #42b72a;
    --danger: #fa383e;
    --dark: #1c1e21;
    --gray: #65676b;
    --light: #f0f2f5;
    --white: #ffffff;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--light);
    color: var(--dark);
    line-height: 1.6;
}

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

/* Header */
.header {
    background: var(--white);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo {
    font-size: 24px;
    font-weight: bold;
    color: var(--primary);
    text-decoration: none;
}

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

.nav-links a {
    text-decoration: none;
    color: var(--gray);
    font-weight: 500;
    transition: color 0.3s;
    padding: 8px 12px;
    border-radius: 8px;
}

.nav-links a:hover {
    color: var(--primary);
    background: rgba(24, 119, 242, 0.1);
}

/* Hero */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 80px 0;
    text-align: center;
    color: var(--white);
}

.reels-hero {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.story-hero {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.mp3-hero {
    background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
}

.thum-hero {
    background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
}

.hero h1 {
    font-size: 48px;
    margin-bottom: 20px;
}

.hero p {
    font-size: 20px;
    margin-bottom: 40px;
    opacity: 0.9;
}

/* Download Form */
.download-form {
    max-width: 700px;
    margin: 0 auto;
}

.input-group {
    display: flex;
    gap: 10px;
    background: var(--white);
    padding: 10px;
    border-radius: 50px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.input-group input {
    flex: 1;
    padding: 15px 25px;
    border: none;
    outline: none;
    font-size: 16px;
    border-radius: 50px;
    background: var(--light);
}

.input-group button {
    padding: 15px 30px;
    background: var(--primary);
    color: var(--white);
    border: none;
    border-radius: 50px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    white-space: nowrap;
}

.input-group button:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(24, 119, 242, 0.4);
}

/* Video Preview */
.video-preview {
    padding: 60px 0;
}

.preview-card {
    background: var(--white);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    max-width: 600px;
    margin: 0 auto;
}

.preview-card img {
    width: 100%;
    height: auto;
    display: block;
}

.video-details {
    padding: 30px;
}

.video-details h2 {
    font-size: 24px;
    margin-bottom: 10px;
}

.quality-selector {
    margin-top: 20px;
}

.quality-option {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    background: var(--light);
    border-radius: 10px;
    margin-bottom: 10px;
    cursor: pointer;
    transition: all 0.3s;
}

.quality-option:hover {
    background: rgba(24, 119, 242, 0.1);
    transform: translateX(5px);
}

.quality-option .quality-label {
    font-weight: 600;
}

.quality-option .download-btn {
    background: var(--success);
    color: var(--white);
    border: none;
    padding: 10px 20px;
    border-radius: 25px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s;
}

.quality-option .download-btn:hover {
    background: #36a420;
    transform: scale(1.05);
}

/* Features */
.features {
    padding: 80px 0;
    background: var(--white);
}

.features h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 50px;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.feature-card {
    text-align: center;
    padding: 30px;
    background: var(--light);
    border-radius: 15px;
    transition: all 0.3s;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.feature-card h3 {
    color: var(--primary);
    font-size: 22px;
    margin-bottom: 10px;
}

/* Error Message */
.error-message {
    background: #fee;
    color: var(--danger);
    padding: 15px;
    border-radius: 10px;
    margin-top: 20px;
    text-align: center;
    font-weight: 500;
}

.success-message {
    background: #efe;
    color: var(--success);
    padding: 15px;
    border-radius: 10px;
    margin-top: 20px;
    text-align: center;
    font-weight: 500;
}

/* Spinner */
.spinner {
    width: 20px;
    height: 20px;
    border: 3px solid var(--white);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto;
}

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

/* Footer */
.footer {
    background: var(--dark);
    color: var(--white);
    text-align: center;
    padding: 30px 0;
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 32px;
    }
    
    .hero p {
        font-size: 16px;
    }
    
    .input-group {
        flex-direction: column;
        border-radius: 25px;
    }
    
    .input-group button {
        width: 100%;
    }
    
    .nav {
        flex-direction: column;
        gap: 15px;
    }
    
    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .feature-grid {
        grid-template-columns: 1fr;
    }
}