/* Explain: Layout structure and alignment utilities for the site. */
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(7, 11, 20, 0.88);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border-color);
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    font-family: var(--font-heading);
    font-size: 1.05rem;
    font-weight: 800;
    letter-spacing: -0.01em;
}

.brand-mark {
    display: grid;
    place-items: center;
    width: 38px;
    height: 38px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: #ffffff;
    font-size: 0.95rem;
}

.brand-accent {
    color: var(--primary-color);
}

.nav-link {
    display: inline-flex;
    align-items: center;
    min-height: 44px;
    padding: 0.4rem 0.85rem;
    border-radius: 999px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-muted);
    transition: color 0.2s ease, background 0.2s ease;
}

.nav-link:hover {
    color: #ffffff;
    background: var(--surface-2);
}

.mobile-drawer {
    position: fixed;
    inset: 0;
    z-index: 60;
}

.mobile-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(4, 7, 14, 0.72);
}

.mobile-panel {
    position: absolute;
    top: 0;
    right: 0;
    display: flex;
    flex-direction: column;
    width: min(340px, 88vw);
    height: 100%;
    padding: 1.25rem;
    background: var(--surface-color);
    border-left: 1px solid var(--border-color);
    overflow-y: auto;
}

.mobile-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    min-height: 50px;
    padding: 0.6rem 0.85rem;
    border-radius: var(--radius-sm);
    color: var(--text-color);
    font-weight: 600;
    transition: background 0.2s ease;
}

.mobile-link:hover {
    background: var(--surface-2);
}

.site-footer {
    border-top: 1px solid var(--border-color);
    background: var(--surface-color);
}

.footer-link {
    display: inline-block;
    padding: 0.3rem 0;
    color: var(--text-muted);
    font-size: 0.9rem;
    transition: color 0.2s ease;
}

.footer-link:hover {
    color: var(--primary-color);
}

.section-title {
    font-size: clamp(1.55rem, 3vw, 2.25rem);
    font-weight: 800;
}

.section-head {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.75rem;
}