/* ========================================
   GQ AI - Index Page (Midnight Indigo Theme)
   Inherits base styles from landing.css
   ======================================== */

/* Grid Layout for Index Page */
.lecture-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 30px;
}

/* Lecture Card Styles */
.lecture-card {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 220px;
    padding: 20px 24px 10px;
    background: var(--bg-panel);
    border: var(--glass-border);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-lg);
    box-shadow: var(--glass-shadow);
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.lecture-card:hover {
    transform: translateY(-5px);
    background: var(--bg-panel-hover);
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: 0 10px 40px -10px rgba(0, 0, 0, 0.5);
}

.lecture-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: transparent;
    transition: background 0.3s ease;
}

/* Category Colors */
.lecture-card.basic::before {
    background: var(--accent-cyan);
}

.lecture-card.intermediate::before {
    background: var(--primary);
}

.lecture-card.practical::before {
    background: var(--accent-purple);
}

.lecture-card.advanced::before {
    background: var(--accent-pink);
}

.lecture-card.expert::before {
    background: linear-gradient(to bottom, var(--accent-cyan), var(--accent-purple));
}

.card-icon-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 15px;
}

.card-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--text-muted);
    transition: all 0.3s ease;
}

.lecture-card:hover .card-icon {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    transform: scale(1.1);
}

/* Icon Colors per Category */
.lecture-card.basic:hover .card-icon {
    color: var(--accent-cyan);
    box-shadow: 0 0 15px rgba(6, 182, 212, 0.2);
}

.lecture-card.intermediate:hover .card-icon {
    color: var(--primary);
    box-shadow: 0 0 15px rgba(59, 130, 246, 0.2);
}

.lecture-card.practical:hover .card-icon {
    color: var(--accent-purple);
    box-shadow: 0 0 15px rgba(139, 92, 246, 0.2);
}

.lecture-card.advanced:hover .card-icon {
    color: var(--accent-pink);
    box-shadow: 0 0 15px rgba(236, 72, 153, 0.2);
}

.card-number {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-muted);
    opacity: 0.6;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 8px;
    line-height: 1.4;
}

.card-description {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: auto;
}

.card-meta {
    margin-top: 20px;
    display: flex;
    gap: 16px;
    font-size: 0.85rem;
    color: var(--text-muted);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 16px;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 6px;
}

/* Section Styling */
.section-wrapper {
    margin-bottom: 80px;
}

.section-head {
    display: flex;
    align-items: center;
    margin-bottom: 30px;
    /* cursor: pointer; */
    /* Toggle functionality requires JS */
}

.section-title {
    font-size: 1.8rem;
    font-weight: 800;
    margin-right: 16px;
    background: linear-gradient(to right, #fff, #94a3b8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.toggle-icon {
    font-size: 1.2rem;
    color: var(--text-muted);
    transition: transform 0.3s ease;
}

/* Landing Section Specifics for Index */
.index-hero {
    min-height: 60vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding-top: 100px;
}

.index-hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 20px;
    line-height: 1.2;
}

.index-hero p {
    font-size: 1.2rem;
    color: var(--text-muted);
    max-width: 600px;
    margin-bottom: 40px;
}

.scroll-indicator {
    font-size: 1.5rem;
    color: var(--accent-cyan);
    animation: bounce 2s infinite;
    cursor: pointer;
}

@keyframes bounce {

    0%,
    20%,
    50%,
    80%,
    100% {
        transform: translateY(0);
    }

    40% {
        transform: translateY(-10px);
    }

    60% {
        transform: translateY(-5px);
    }
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    .index-hero h1 {
        font-size: 2.5rem;
    }

    .lecture-grid {
        grid-template-columns: 1fr;
    }
}