.hero {
    background: linear-gradient(135deg, rgba(100, 108, 255, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
    padding: 3rem 2rem;
    text-align: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}
.hero-content {
    max-width: 800px;
    margin: 0 auto;
}
.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.hero p {
    font-size: 1.1rem;
    color: var(--gray);
}
.main-container {
    max-width: 1000px;
    margin: 3rem auto;
    padding: 0 2rem;
}
/* Collapsible Upload Section */
.collapsible-upload {
    margin-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding-top: 2rem;
}
.collapsible-toggle {
    width: 100%;
    padding: 1rem 1.5rem;
    background: var(--darker);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: var(--light);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}
.collapsible-toggle:hover {
    border-color: var(--primary);
    background: rgba(100, 108, 255, 0.05);
}
.collapsible-content {
    margin-top: 1.5rem;
    padding: 1.5rem;
    background: var(--darker);
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    overflow: hidden;
    transition: height 0.3s ease;
}