/* SEO Backlinks — Layout primitives */

.grid { display: grid; gap: var(--spacing-md); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 968px) {
    .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--spacing-xs); }
.gap-md { gap: var(--spacing-sm); }
.gap-lg { gap: var(--spacing-md); }

.section-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-border-strong), transparent);
    margin: 0 auto;
    max-width: var(--max-width);
}

/* Header */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(8, 8, 12, 0.65);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 1rem 1.5rem;
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 2rem;
}

.site-header__logo {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--color-text-light);
    letter-spacing: -0.02em;
}

.site-header__logo-mark {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: var(--gradient-primary);
    display: grid;
    place-items: center;
    color: #fff;
    font-weight: 700;
    box-shadow: 0 0 16px var(--color-primary-dim);
    position: relative;
    overflow: hidden;
}

.site-header__logo-mark::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent 0%, rgba(255,255,255,0.4) 50%, transparent 100%);
    transform: translateX(-100%);
    transition: transform 0.6s ease;
}

.site-header__logo:hover .site-header__logo-mark::after {
    transform: translateX(100%);
}

.site-header__nav {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
}

.site-header__nav a {
    color: var(--color-text-medium);
    padding: 0.5rem 0.95rem;
    border-radius: var(--radius-md);
    font-size: 0.92rem;
    font-weight: 500;
    transition: color var(--transition-normal), background var(--transition-normal);
}

.site-header__nav a:hover {
    color: var(--color-text-light);
    background: var(--color-surface);
}

.site-header__cta {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

.mobile-toggle {
    display: none;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    color: var(--color-text-light);
    width: 42px;
    height: 42px;
    border-radius: var(--radius-md);
    cursor: pointer;
    align-items: center;
    justify-content: center;
}

@media (max-width: 900px) {
    .site-header__nav { display: none; }
    .site-header__cta .btn { display: none; }
    .mobile-toggle { display: inline-flex; }
}

/* Mobile drawer */
.mobile-drawer {
    position: fixed;
    inset: 0;
    z-index: 200;
    background: rgba(5, 5, 7, 0.96);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    display: none;
    flex-direction: column;
}

.mobile-drawer.is-open { display: flex; }

.mobile-drawer__head {
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--color-border);
}

.mobile-drawer__nav {
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    flex: 1;
}

.mobile-drawer__nav a {
    padding: 1rem 1.25rem;
    color: var(--color-text-light);
    font-size: 1.2rem;
    font-weight: 500;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-surface);
}

.mobile-drawer__cta { padding: 0 1.5rem 2rem; }

/* Footer */
.site-footer {
    position: relative;
    padding: 5rem 1.5rem 2rem;
    background: var(--color-bg-darker);
    border-top: 1px solid var(--color-border);
    margin-top: 6rem;
    overflow: hidden;
}

.site-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
    opacity: 0.6;
}

.site-footer__inner {
    max-width: var(--max-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1.5fr repeat(4, 1fr);
    gap: 3rem;
    margin-bottom: 3rem;
}

.site-footer__brand h4 {
    font-size: 1.4rem;
    margin-bottom: 0.75rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    display: inline-block;
}

.site-footer__brand p {
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    max-width: 280px;
}

.site-footer__col h5 {
    color: var(--color-text-light);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1rem;
}

.site-footer__col ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
}

.site-footer__col a {
    color: var(--color-text-muted);
    font-size: 0.92rem;
    transition: color var(--transition-normal);
}

.site-footer__col a:hover { color: var(--color-text-light); }

.site-footer__bottom {
    border-top: 1px solid var(--color-border);
    padding-top: 1.5rem;
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.site-footer__bottom p { font-size: 0.85rem; color: var(--color-text-dark); }

.site-footer__social { display: flex; gap: 0.5rem; }

.site-footer__social a {
    width: 38px;
    height: 38px;
    border-radius: var(--radius-md);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    display: grid;
    place-items: center;
    color: var(--color-text-medium);
    transition: all var(--transition-normal);
}

.site-footer__social a:hover {
    color: var(--color-text-light);
    border-color: var(--color-primary);
    background: var(--color-primary-dim);
}

@media (max-width: 900px) {
    .site-footer__inner {
        grid-template-columns: 1fr 1fr;
        gap: 2rem;
    }
}

@media (max-width: 600px) {
    .site-footer__inner { grid-template-columns: 1fr; }
    .site-footer__bottom { flex-direction: column; text-align: center; }
}