:root {
    --primary-color: #4361ee;
    --secondary-color: #3a0ca3;
    --accent-color: #f72585;
    --light-color: #f8f9fa;
    --dark-color: #212529;
    --success-color: #4cc9f0;
    --warning-color: #f9c74f;
    --danger-color: #f94144;
    --gray-color: #6c757d;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--light-color);
    min-height: 100vh;
    padding-bottom: 2rem;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* Header */
header {
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(10px);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--light-color);
}

nav ul {
    display: flex;
    list-style: none;
    gap: 1.5rem;
}

nav a {
    color: var(--light-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
    display: flex;
    align-items: center;
    gap: 5px;
}

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

.user-actions {
    display: flex;
    gap: 1rem;
}

.btn {
    padding: 0.5rem 1rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

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

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

.btn-outline {
    border: 2px solid var(--light-color);
    color: var(--light-color);
}

.btn-outline:hover {
    background: var(--light-color);
    color: var(--primary-color);
}

/* Hero */
.hero {
    text-align: center;
    padding: 4rem 0;
}

.hero h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    background: linear-gradient(to right, #f72585, #4cc9f0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto 2rem;
    color: var(--light-color);
}

/* Upload Section */
.upload-section {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 2rem;
    margin: 2rem auto;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.section-title {
    text-align: center;
    margin-bottom: 2rem;
    font-size: 1.8rem;
    color: var(--light-color);
}

.upload-area {
    border: 3px dashed rgba(255, 255, 255, 0.3);
    border-radius: 15px;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s;
    cursor: pointer;
    margin-bottom: 1.5rem;
}

.upload-area:hover {
    border-color: var(--accent-color);
    background: rgba(255, 255, 255, 0.05);
}

.upload-icon {
    font-size: 4rem;
    color: var(--light-color);
    margin-bottom: 1rem;
}

.upload-text h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.upload-text p {
    color: rgba(255, 255, 255, 0.8);
}

.file-input {
    display: none;
}

.upload-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0.8rem 2rem;
    font-size: 1.1rem;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: 1rem;
}

.upload-btn:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.2);
}

/* Features */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 4rem 0;
}

.feature-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 1.5rem;
    text-align: center;
    transition: transform 0.3s;
}

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

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--accent-color);
}

.feature-card h3 {
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.feature-card p {
    color: rgba(255, 255, 255, 0.8);
}

/* Footer */
footer {
    background: rgba(0, 0, 0, 0.8);
    padding: 2rem 0;
    margin-top: 4rem;
    text-align: center;
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--light-color);
    text-decoration: none;
    transition: color 0.3s;
}

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

.copyright {
    color: rgba(255, 255, 255, 0.6);
    margin-top: 1rem;
}

/* Responsive */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 1rem;
    }
    
    nav ul {
        gap: 1rem;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .hero h2 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .upload-area {
        padding: 1.5rem;
    }
}