/* ===== Lab Section ===== */
.lab-section {
    padding: 0 0 100px;
}

.lab-block {
    margin-bottom: 80px;
}

.lab-block-header {
    max-width: 700px;
    margin: 0 auto 32px;
    text-align: center;
}

.lab-block-header h2 {
    font-size: 1.8rem;
    margin-bottom: 10px;
}

.lab-block-header p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===== Shader Preview ===== */
.shader-preview {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 0;
}

.shader-preview-visual {
    min-height: 320px;
    background: linear-gradient(135deg, #0a0a0a, #111, #0a0a0a);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    color: var(--text-secondary);
}

.shader-preview-visual i {
    font-size: 3rem;
    color: var(--accent);
    opacity: 0.3;
}

.shader-preview-visual span {
    font-size: 0.85rem;
}

.shader-preview-info {
    padding: 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.shader-preview-info h3 {
    font-size: 1.3rem;
    margin-bottom: 12px;
}

.shader-preview-info p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 24px;
}

/* ===== Lab Grid ===== */
.lab-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.lab-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    padding: 28px;
    transition: all var(--transition);
}

.lab-card:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.lab-card-visual {
    width: 100%;
    aspect-ratio: 16 / 9;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--accent);
    opacity: 0.5;
    margin-bottom: 20px;
}

.lab-card h3 {
    font-size: 1.05rem;
    margin-bottom: 8px;
}

.lab-card p {
    color: var(--text-secondary);
    font-size: 0.88rem;
    line-height: 1.6;
    margin-bottom: 16px;
}

.lab-status {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.lab-status--wip {
    background: rgba(0, 229, 255, 0.1);
    color: var(--accent);
}

.lab-status--concept {
    background: rgba(124, 77, 255, 0.1);
    color: var(--accent2);
}

/* ===== Lab Notes ===== */
.lab-notes {
    display: flex;
    flex-direction: column;
    gap: 16px;
    max-width: 700px;
    margin: 0 auto;
}

.lab-note {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    transition: all var(--transition);
}

.lab-note:hover {
    border-color: var(--accent);
}

.lab-note-meta {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
    flex-wrap: wrap;
}

.lab-note-meta time {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--text-secondary);
}

.lab-note h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
}

.lab-note h3 a {
    color: var(--text-primary);
    transition: color var(--transition);
}

.lab-note h3 a:hover {
    color: var(--accent);
}

.lab-note p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 12px;
}

.lab-note-link {
    font-size: 0.85rem;
    color: var(--accent);
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: gap var(--transition);
}

.lab-note-link:hover {
    gap: 10px;
}

.lab-notes-more {
    text-align: center;
    margin-top: 32px;
}

/* ===== Shared Blog Label ===== */
.blog-label {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 3px 10px;
    border-radius: 20px;
    border: 1px solid;
}

/* ===== Loading & Empty States ===== */
.loading,
.empty,
.error {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.error i {
    color: #f59e0b;
    margin-right: 6px;
}

.error button,
.empty button {
    background: none;
    border: 1px solid var(--border);
    color: var(--accent);
    padding: 8px 18px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.85rem;
    margin-left: 8px;
    transition: all var(--transition);
}

.error button:hover,
.empty button:hover {
    border-color: var(--accent);
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
    .shader-preview {
        grid-template-columns: 1fr;
    }

    .shader-preview-visual {
        min-height: 220px;
    }
}