/* ============================================
   LAYOUT — Navigation, Footer, Grid
   rolandmantama.ch
   ============================================ */

/* --- Navigation --- */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: background-color var(--transition-normal), box-shadow var(--transition-normal);
}

.site-header.is-scrolled {
    background-color: var(--color-bg-primary);
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

[data-theme="dark"] .site-header.is-scrolled {
    background-color: rgba(12, 10, 9, 0.9);
}

.nav {
    height: var(--nav-height);
}

.nav__container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.nav__logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--color-text-primary);
    font-family: var(--font-display);
    font-weight: 700;
    text-decoration: none;
    z-index: 10;
}

.nav__logo:hover {
    color: var(--color-text-primary);
}

.nav__logo-monogram {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    background: var(--color-accent);
    color: #fff;
    font-family: var(--font-mono);
    font-size: var(--text-sm);
    font-weight: 700;
    border-radius: var(--radius-md);
    letter-spacing: 0.05em;
}

.nav__logo-text {
    font-size: var(--text-sm);
    letter-spacing: -0.01em;
}

.nav__links {
    display: flex;
    gap: var(--space-lg);
}

.nav__link {
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
    font-weight: 500;
    position: relative;
    padding: var(--space-xs) 0;
    transition: color var(--transition-fast);
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: width var(--transition-normal);
}

.nav__link:hover,
.nav__link.is-active {
    color: var(--color-accent);
}

.nav__link:hover::after,
.nav__link.is-active::after {
    width: 100%;
}

.nav__actions {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    z-index: 10;
}

.nav__lang-switch {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-xs) var(--space-sm);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

.nav__lang-switch:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
}

.nav__theme-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.25rem;
    height: 2.25rem;
    background: none;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.nav__theme-toggle:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
}

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

/* Burger */
.nav__burger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 2.25rem;
    height: 2.25rem;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
}

.nav__burger-line {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--color-text-primary);
    border-radius: 2px;
    transition: transform var(--transition-normal), opacity var(--transition-fast);
}

.nav__burger[aria-expanded="true"] .nav__burger-line:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav__burger[aria-expanded="true"] .nav__burger-line:nth-child(2) {
    opacity: 0;
}

.nav__burger[aria-expanded="true"] .nav__burger-line:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* Mobile */
@media (max-width: 767px) {
    .nav__links {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: var(--space-xl);
        background: var(--color-bg-primary);
        opacity: 0;
        visibility: hidden;
        transition: opacity var(--transition-normal), visibility var(--transition-normal);
    }

    .nav__links.is-open {
        opacity: 1;
        visibility: visible;
    }

    .nav__link {
        font-size: var(--text-xl);
    }

    .nav__burger {
        display: flex;
    }

    .nav__logo-text {
        display: none;
    }
}

/* --- Footer --- */
.site-footer {
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    padding: var(--space-4xl) 0 var(--space-xl);
    margin-top: var(--space-5xl);
}

.footer__container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.footer__grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-2xl);
}

@media (max-width: 767px) {
    .footer__grid {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }
}

@media (min-width: 768px) and (max-width: 1023px) {
    .footer__grid {
        grid-template-columns: 1fr 1fr;
    }
}

.footer__logo-monogram {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 3rem;
    height: 3rem;
    background: var(--color-accent);
    color: #fff;
    font-family: var(--font-mono);
    font-size: var(--text-base);
    font-weight: 700;
    border-radius: var(--radius-md);
    margin-bottom: var(--space-md);
}

.footer__tagline {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-sm);
}

.footer__mantra {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    font-style: italic;
}

.footer__heading {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--space-md);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer__links {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.footer__links a,
.footer__links li {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}

.footer__links a:hover {
    color: var(--color-accent);
}

.footer__bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-md);
    padding-top: var(--space-xl);
    margin-top: var(--space-2xl);
    border-top: 1px solid var(--color-border);
}

.footer__copyright,
.footer__craft {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
}

.footer__legal-links {
    display: flex;
    gap: var(--space-md);
}

.footer__legal-links a {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
}

.footer__legal-links a:hover {
    color: var(--color-accent);
}