/* ==========================================================================
   DIAI Layout CSS
   Structure, spacing, containers, header, nav, footer
   ========================================================================== */

.container,
.site-header__inner,
.site-nav__inner,
.footer-container,
.footer-bottom {
    width: min(100% - 48px, var(--container-width));
    margin-inline: auto;
}

/* Page */

.page {
    min-height: 60vh;
}

.section {
    padding: 72px 0;
}

.section-header {
    max-width: 760px;
    margin-bottom: 36px;
}

.section-header h2 {
    margin-top: 8px;
}

/* Header */

.site-header {
    background: rgba(255, 255, 255, 0.86);
    border-bottom: 1px solid var(--color-border);
    backdrop-filter: blur(18px);
}

.site-header__inner {
    min-height: 76px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.site-brand {
    display: flex;
    align-items: center;
    gap: 14px;
}

.site-brand__mark {
    width: 52px;
    height: 52px;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-soft));
    color: #ffffff;
    display: grid;
    place-items: center;
    font-weight: 800;
    letter-spacing: -0.04em;
}

.site-brand__title {
    font-size: 16px;
    font-weight: 700;
    line-height: 1.25;
}

.site-brand__subtitle {
    margin-top: 2px;
    font-size: 13px;
    color: var(--color-text-muted);
}

/* Tools */

.site-tools {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    font-weight: 700;
}

.language-link {
    color: var(--color-text-muted);
}

.language-link.is-active {
    color: var(--color-primary);
}

.language-separator {
    color: var(--color-border);
}

/* Navigation */

.site-nav {
    position: relative;
    z-index: 1000;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 8px 22px rgba(7, 24, 39, 0.08);
}

.site-nav.is-fixed {
    position: fixed;
    inset: 0 0 auto;
    width: 100%;
    animation: nav-settle .18s ease-out;
}

.site-nav-spacer {
    display: none;
}

.site-nav-spacer.is-active {
    display: block;
}

@keyframes nav-settle {
    from { transform: translateY(-8px); opacity: .96; }
    to { transform: translateY(0); opacity: 1; }
}

.site-nav__inner {
    min-height: 52px;
    display: flex;
    align-items: center;
    gap: 26px;
    overflow-x: auto;
    overscroll-behavior-x: contain;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}

.site-nav__inner::-webkit-scrollbar {
    display: none;
}

.site-nav a {
    position: relative;
    white-space: nowrap;
    font-size: 14px;
    font-weight: 650;
    color: var(--color-text-soft);
}

.site-nav a:hover,
.site-nav a.is-active {
    color: var(--color-primary);
}

.site-nav a.is-active::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: -17px;
    height: 3px;
    border-radius: 999px;
    background: var(--color-accent);
}

/* Footer */

.site-footer {
    margin-top: 72px;
    padding: 48px 0 28px;
    background: #0b1220;
    color: rgba(255, 255, 255, 0.82);
}

.footer-container {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 42px;
}

.site-footer h3,
.site-footer h4 {
    color: #ffffff;
    margin-bottom: 12px;
}

.site-footer p,
.site-footer li {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.68);
}

.site-footer a:hover {
    color: #ffffff;
}

.footer-bottom {
    margin-top: 36px;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    display: flex;
    justify-content: space-between;
    gap: 24px;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.52);
}