/*
 * Layout — Site-Header, Site-Nav, Site-Footer, Section-Grundgerüst.
 */

/* ================================================================
 * 1. Site-Header (sticky, transparent → blurred bei scroll)
 * ================================================================ */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: transparent;
    border-bottom: 1px solid transparent;
    transition: background     var(--dur-base) var(--ease-out),
                border-color   var(--dur-base) var(--ease-out),
                backdrop-filter var(--dur-base) var(--ease-out);
}

.site-header[data-state="scrolled"] {
    background: var(--color-bg-overlay);
    border-bottom-color: var(--color-border);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--sp-5);
    padding-block: var(--sp-3);
    min-height: 7rem;
}

.site-header__brand {
    display: inline-flex;
    align-items: center;
    flex-shrink: 0;
}

.site-header__logo {
    display: block;
    height: 3.75rem;
    width: auto;
}

@media (min-width: 768px) {
    .site-header__logo { height: 4.75rem; }
}

/* ================================================================
 * 2. Mobile Hamburger
 * ================================================================ */
.site-header__toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.75rem;
    height: 2.75rem;
    border-radius: var(--r-md);
    color: var(--color-text);
    transition: background var(--dur-fast) var(--ease-out);
}

.site-header__toggle:hover  { background: var(--color-bg-elevated); }
.site-header__toggle:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.site-header__toggle-bars,
.site-header__toggle-bars::before,
.site-header__toggle-bars::after {
    display: block;
    width: 1.5rem;
    height: 2px;
    background: currentColor;
    border-radius: 1px;
    transition: transform var(--dur-base) var(--ease-out),
                opacity   var(--dur-base) var(--ease-out),
                background var(--dur-base) var(--ease-out);
}

.site-header__toggle-bars         { position: relative; }
.site-header__toggle-bars::before,
.site-header__toggle-bars::after  { content: ""; position: absolute; inset-inline-start: 0; }
.site-header__toggle-bars::before { top: -7px; }
.site-header__toggle-bars::after  { top:  7px; }

.site-header__toggle[aria-expanded="true"] .site-header__toggle-bars         { background: transparent; }
.site-header__toggle[aria-expanded="true"] .site-header__toggle-bars::before { transform: translateY(7px) rotate(45deg); }
.site-header__toggle[aria-expanded="true"] .site-header__toggle-bars::after  { transform: translateY(-7px) rotate(-45deg); }

@media (min-width: 1024px) {
    .site-header__toggle { display: none; }
}

/* ================================================================
 * 3. Site-Nav — Mobile Drawer / Desktop Inline
 * ================================================================ */
.site-nav {
    position: fixed;
    inset: 7rem 0 0 0;
    background: var(--color-bg);
    transform: translateY(-110%);
    transition: transform var(--dur-base) var(--ease-out);
    overflow-y: auto;
    padding: var(--sp-6) var(--sp-5);
    visibility: hidden;
}

.site-nav[data-open="true"] {
    transform: translateY(0);
    visibility: visible;
}

.site-nav__menu {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: var(--sp-2);
}

.site-nav__menu a {
    display: block;
    padding: var(--sp-3) var(--sp-4);
    border-radius: var(--r-md);
    color: var(--color-text);
    font-family: var(--font-display);
    font-weight: var(--fw-medium);
    font-size: var(--fs-md);
    transition: background var(--dur-fast) var(--ease-out),
                color      var(--dur-fast) var(--ease-out);
}

.site-nav__menu a:hover,
.site-nav__menu a.is-active,
.site-nav__menu .current-menu-item > a {
    background: var(--color-bg-elevated);
    color: var(--color-accent-soft);
}

.site-nav__menu .is-external > a::after {
    content: "↗";
    margin-inline-start: 0.35em;
    font-weight: var(--fw-normal);
    color: var(--color-text-muted);
}

@media (min-width: 1024px) {
    .site-nav {
        position: static;
        inset: auto;
        background: transparent;
        transform: none;
        visibility: visible;
        overflow: visible;
        padding: 0;
    }
    .site-nav__menu {
        flex-direction: row;
        gap: var(--sp-1);
        align-items: center;
    }
    .site-nav__menu a {
        font-size: var(--fs-sm);
        letter-spacing: 0.01em;
        padding: var(--sp-2) var(--sp-3);
    }
}

body.nav-open { overflow: hidden; }

/* ================================================================
 * 4. Sections — Grundgerüst
 * ================================================================ */
.site-main { isolation: isolate; }

.section {
    padding-block: var(--sp-9);
    scroll-margin-top: 5rem;
}

.section--hero {
    padding-block: var(--sp-10) var(--sp-9);
    background: var(--color-bg-deep);
    min-height: 60vh;
    display: flex;
    align-items: center;
}

.section__placeholder {
    color: var(--color-text-muted);
    font-style: italic;
    text-align: center;
    padding: var(--sp-7) var(--sp-5);
    border: 1px dashed var(--color-border);
    border-radius: var(--r-lg);
}


/* ================================================================
 * 5. Site-Footer
 * ================================================================ */
.site-footer {
    background: var(--color-bg-deep);
    border-top: 1px solid var(--color-border);
    padding-block: var(--sp-8);
    color: var(--color-text-muted);
    font-size: var(--fs-sm);
    line-height: var(--lh-snug);
}

.site-footer__inner {
    display: grid;
    gap: var(--sp-5);
    grid-template-columns: 1fr;
}

.site-footer p { margin: 0 0 var(--sp-2) 0; }
.site-footer p:last-child { margin-bottom: 0; }

.site-footer__name    { color: var(--color-text); font-size: var(--fs-base); }
.site-footer__contact a { color: var(--color-accent-soft); }
.site-footer__contact a:hover { color: var(--color-accent); }
.site-footer__hours   { color: var(--color-text-subtle); }

.site-footer__menu {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: var(--sp-4);
}
.site-footer__menu a {
    color: var(--color-text-muted);
    transition: color var(--dur-fast) var(--ease-out);
}
.site-footer__menu a:hover { color: var(--color-accent-soft); }

.site-footer__copy   { color: var(--color-text-subtle); font-size: var(--fs-xs); }
.site-footer__cookie {
    color: var(--color-text-subtle);
    font-size: var(--fs-xs);
    padding-top: var(--sp-3);
    border-top: 1px solid var(--color-border-soft);
}

@media (min-width: 768px) {
    .site-footer__inner {
        grid-template-columns: 2fr 1fr;
        gap: var(--sp-6) var(--sp-7);
    }
    .site-footer__brand   { grid-column: 1; grid-row: 1; }
    .site-footer__nav     { grid-column: 2; grid-row: 1; justify-self: end; align-self: start; }
    .site-footer__copy    { grid-column: 1 / -1; grid-row: 2; }
    .site-footer__cookie  { grid-column: 1 / -1; grid-row: 3; }
}