:root {
    --primary: #3b82f6;
    --primary-glow: rgba(59, 130, 246, 0.5);
}

/* Feature Grid Layout System from original vtc-hub-docs.html */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 25px;
    margin-bottom: 40px;
}

.feature-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 30px;
    transition: 0.3s;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.5);
}

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

.card-icon {
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    color: #fff;
}

.card-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 10px;
}

.card-desc {
    font-size: 0.95rem;
    color: var(--text-dim);
    line-height: 1.6;
    flex-grow: 1;
}

.card-image {
    width: 100%;
    height: 150px;
    object-fit: cover;
    border-radius: 8px;
    margin-top: 20px;
    border: 1px solid var(--border);
    opacity: 0.8;
    transition: 0.3s;
}

.feature-card:hover .card-image {
    opacity: 1;
}

/* Subscription Tier Indicators */
.plan-badge {
    font-size: 0.65rem;
    font-weight: 800;
    padding: 4px 10px;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.plan-community {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.plan-supporter {
    background: rgba(59, 130, 246, 0.15);
    color: #3b82f6;
    border: 1px solid rgba(59, 130, 246, 0.3);
}

.plan-elite {
    background: rgba(255, 215, 0, 0.15);
    color: #ffd700;
    border: 1px solid rgba(255, 215, 0, 0.3);
}

.feature-card ul { margin-top: 15px; padding-left: 10px; list-style-type: none; }
.feature-card li { margin-bottom: 8px; font-size: 0.85rem; color: var(--text-dim); position: relative; padding-left: 15px; line-height: 1.4; }
.feature-card li::before { content: "•"; color: var(--primary); position: absolute; left: 0; font-weight: bold; }
.feature-card li strong { color: #e2e8f0; font-weight: 700; }
.tip-box {
    background: rgba(245, 158, 11, 0.1); border: 1px solid rgba(245, 158, 11, 0.3);
    border-radius: 12px; padding: 12px; margin-top: 15px;
    font-size: 0.8rem; color: #f59e0b; display: flex; gap: 10px; align-items: flex-start;
    line-height: 1.5;
}
.tip-box i { font-size: 1.1rem; margin-top: 1px; flex-shrink: 0; }
.tip-box strong { color: #fff; font-weight: 800; }

/* Mystery Cards for Roadmap */
.mystery-card .card-title,
.mystery-card p {
    filter: blur(8px);
    opacity: 0.5;
    user-select: none;
}
.coming-soon-badge {
    display: inline-flex; align-items: center; gap: 8px;
    background: rgba(245, 158, 11, 0.15); border: 1px solid rgba(245, 158, 11, 0.4);
    color: #f59e0b; padding: 8px 16px; border-radius: 8px;
    font-weight: 800; font-size: 0.75rem; letter-spacing: 1px; text-transform: uppercase;
    margin-bottom: 10px;
}