/* ==========================================================================
   Site chrome - navigation and footer
   New component classes (site-*) so this is additive alongside the legacy
   .nav / .contact styles in main.css until every page has migrated off them.
   ========================================================================== */

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(10, 13, 11, 0.85);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--ns-border);
}

[data-theme="light"] .site-header {
    background: rgba(250, 250, 248, 0.85);
}

.site-nav-inner {
    max-width: var(--ns-container);
    margin: 0 auto;
    padding: var(--ns-space-sm) var(--ns-space-lg);
    display: flex;
    align-items: center;
    gap: var(--ns-space-lg);
}

.site-logo {
    font-family: var(--ns-font-mono);
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--ns-accent);
    text-decoration: none;
    letter-spacing: 0.02em;
}

.site-nav-menu {
    display: flex;
    align-items: center;
    gap: var(--ns-space-md);
    flex: 1;
}

.site-nav-link {
    font-size: var(--ns-text-small);
    font-weight: 500;
    color: var(--ns-text-secondary);
    text-decoration: none;
    padding: var(--ns-space-xs) 0;
    position: relative;
    transition: color var(--ns-transition);
}

.site-nav-link:hover {
    color: var(--ns-text);
}

.site-nav-link.is-active {
    color: var(--ns-text);
}

.site-nav-link.is-active::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: -6px;
    height: 2px;
    background: var(--ns-accent);
    border-radius: var(--ns-radius-full);
}

.site-nav-actions {
    display: flex;
    align-items: center;
    gap: var(--ns-space-xs);
}

.icon-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--ns-radius-sm);
    border: 1px solid var(--ns-border);
    background: var(--ns-bg-raised);
    color: var(--ns-text-secondary);
    text-decoration: none;
    cursor: pointer;
    transition: border-color var(--ns-transition), color var(--ns-transition);
}

.icon-btn:hover {
    border-color: var(--ns-border-strong);
    color: var(--ns-text);
}

.icon-btn svg {
    width: 18px;
    height: 18px;
}

.theme-toggle .icon-moon,
.theme-toggle .icon-sun {
    display: none;
}

:root .theme-toggle .icon-moon,
[data-theme="dark"] .theme-toggle .icon-moon {
    display: block;
}

[data-theme="light"] .theme-toggle .icon-moon {
    display: none;
}

[data-theme="light"] .theme-toggle .icon-sun {
    display: block;
}

.site-nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 4px;
    width: 36px;
    height: 36px;
    border-radius: var(--ns-radius-sm);
    border: 1px solid var(--ns-border);
    background: var(--ns-bg-raised);
    cursor: pointer;
}

.site-nav-toggle span {
    display: block;
    width: 16px;
    height: 2px;
    margin: 0 auto;
    background: var(--ns-text-secondary);
    transition: transform var(--ns-transition), opacity var(--ns-transition);
}

@media (max-width: 860px) {
    .site-nav-toggle {
        display: flex;
        order: 3;
    }

    .site-logo {
        order: 1;
    }

    .site-nav-actions {
        order: 2;
    }

    .site-nav-menu {
        order: 4;
        flex-basis: 100%;
        flex-direction: column;
        align-items: flex-start;
        gap: 0;
        max-height: 0;
        overflow: hidden;
        transition: max-height var(--ns-transition);
    }

    .site-nav-menu.is-open {
        max-height: 320px;
    }

    .site-nav-link {
        width: 100%;
        padding: var(--ns-space-sm) 0;
        border-bottom: 1px solid var(--ns-border);
    }
}

/* Matrix rain background
   Fixed full-viewport canvas painted by assets/js/matrix-rain.js. Negative
   z-index puts it behind normal in-flow content but above the flat body
   background, so any element with its own background (cards, buttons, the
   hero art panel) naturally occludes it without extra styling.
   ========================================================================== */

.ns-matrix-rain {
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    opacity: 0.35;
}

[data-theme="light"] .ns-matrix-rain {
    opacity: 0.16;
}

/* Glitch text
   Reusable on any element via assets/js/glitch.js: a constant CSS chromatic-
   aberration flicker (data-text overlay) plus a JS character scramble on the
   real text nodes, so nested markup like accent spans survives.
   ========================================================================== */

.ns-glitch {
    position: relative;
}

.ns-glitch::before,
.ns-glitch::after {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--ns-bg);
    opacity: 0;
    pointer-events: none;
    animation: ns-glitch-flicker 3s infinite;
}

.ns-glitch::before {
    color: var(--ns-glitch-a);
    animation-delay: 0.1s;
    transform: translateX(-2px);
}

.ns-glitch::after {
    color: var(--ns-glitch-b);
    animation-delay: 0.2s;
    transform: translateX(2px);
}

@keyframes ns-glitch-flicker {
    0%, 90%, 100% { opacity: 0; }
    91%, 99% { opacity: 1; }
}

/* Footer
   ========================================================================== */

.site-footer {
    border-top: 1px solid var(--ns-border);
    background: var(--ns-bg-raised);
    margin-top: var(--ns-space-2xl);
}

.site-footer-inner {
    max-width: var(--ns-container);
    margin: 0 auto;
    padding: var(--ns-space-xl) var(--ns-space-lg);
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr;
    gap: var(--ns-space-xl);
}

.site-footer-brand p {
    margin-top: var(--ns-space-xs);
    color: var(--ns-text-secondary);
    font-size: var(--ns-text-small);
    max-width: 32ch;
}

.site-footer-col h3 {
    font-family: var(--ns-font-mono);
    font-size: var(--ns-text-label);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--ns-accent);
    margin-bottom: var(--ns-space-sm);
}

.site-footer-col {
    display: flex;
    flex-direction: column;
    gap: var(--ns-space-xs);
}

.site-footer-col a {
    color: var(--ns-text-secondary);
    text-decoration: none;
    font-size: var(--ns-text-small);
    transition: color var(--ns-transition);
}

.site-footer-col a:hover {
    color: var(--ns-text);
}

.site-footer-bottom {
    border-top: 1px solid var(--ns-border);
    padding: var(--ns-space-sm) var(--ns-space-lg);
    text-align: center;
    color: var(--ns-text-muted);
    font-size: var(--ns-text-label);
}

@media (max-width: 700px) {
    .site-footer-inner {
        grid-template-columns: 1fr;
        gap: var(--ns-space-lg);
    }
}