/* Grundlegendes Seitenlayout: Container, Header, Footer, Sektionen, Grid. */

/* Selbst gehostete Fonts, keine externen Requests. */
@font-face {
    font-family: 'Plus Jakarta Sans';
    font-style: normal;
    font-weight: 200 800;
    font-display: swap;
    src: url('/assets/fonts/plus-jakarta-sans-variable.woff2') format('woff2-variations');
}

@font-face {
    font-family: 'DM Mono';
    font-style: normal;
    font-weight: 400;
    font-display: swap;
    src: url('/assets/fonts/dm-mono-400.woff2') format('woff2');
}

@font-face {
    font-family: 'DM Mono';
    font-style: normal;
    font-weight: 500;
    font-display: swap;
    src: url('/assets/fonts/dm-mono-500.woff2') format('woff2');
}

body {
    background: var(--color-background);
    color: var(--color-text);
    font-family: var(--font-sans);
    font-size: 1rem;
}

.container {
    width: 100%;
    max-width: var(--container-width);
    margin-inline: auto;
    padding-inline: var(--container-padding);
}

.skip-link {
    position: absolute;
    left: 1rem;
    top: -3rem;
    background: var(--color-ink);
    color: #fff;
    padding: 0.75rem 1.25rem;
    border-radius: var(--radius-sm);
    z-index: 999;
    transition: top 0.15s ease;
}

.skip-link:focus {
    top: 1rem;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ---------- Header ---------- */

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(247, 248, 252, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
    min-height: var(--header-height);
}

.site-header__actions {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.nav-login {
    font-weight: 500;
    font-size: 0.9375rem;
    color: var(--color-text);
    padding: 0.5rem 0.25rem;
}

.nav-login:hover {
    color: var(--color-primary);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 42px;
    height: 42px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
}

.nav-toggle__bar {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--color-ink);
    transition: transform 0.2s ease, opacity 0.2s ease;
}

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

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

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

/* ---------- Primary Navigation ---------- */

.primary-nav {
    display: flex;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    flex-wrap: wrap;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: inline-flex;
    align-items: center;
    padding: 0.6rem 0.75rem;
    border-radius: var(--radius-sm);
    font-weight: 500;
    font-size: 0.9375rem;
    color: var(--color-text);
}

.nav-link:hover,
.nav-link:focus-visible {
    color: var(--color-primary);
}

.nav-dropdown {
    position: relative;
}

.nav-dropdown > summary {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.6rem 0.75rem;
    border-radius: var(--radius-sm);
    font-weight: 500;
    font-size: 0.9375rem;
    cursor: pointer;
    list-style: none;
}

.nav-dropdown > summary::-webkit-details-marker {
    display: none;
}

.nav-dropdown > summary::after {
    content: "";
    width: 7px;
    height: 7px;
    border-right: 2px solid currentColor;
    border-bottom: 2px solid currentColor;
    transform: rotate(45deg) translateY(-2px);
    transition: transform 0.15s ease;
    opacity: 0.6;
}

.nav-dropdown:hover > summary,
.nav-dropdown > summary:focus-visible {
    color: var(--color-primary);
}

.nav-dropdown[open] > summary::after {
    transform: rotate(-135deg) translateY(1px);
}

.nav-dropdown__panel {
    padding-top: var(--space-1);
}

.nav-dropdown__panel ul {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.nav-dropdown__panel a {
    display: block;
    padding: 0.55rem 0.9rem;
    border-radius: var(--radius-sm);
    font-size: 0.9375rem;
    color: var(--color-muted);
}

.nav-dropdown__panel a:hover,
.nav-dropdown__panel a:focus-visible {
    background: var(--color-surface-alt);
    color: var(--color-ink);
}

@media (min-width: 1024px) {
    .nav-dropdown__panel {
        position: absolute;
        top: 100%;
        left: -0.5rem;
        min-width: 280px;
        background: var(--color-surface);
        border: 1px solid var(--color-border);
        border-radius: var(--radius-md);
        box-shadow: var(--shadow-lg);
        padding: 0.6rem;
        margin-top: 0.4rem;
    }
}

/* ---------- Mobile Navigation ---------- */

@media (max-width: 1023.98px) {
    .nav-toggle {
        display: inline-flex;
    }

    .primary-nav {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-surface);
        border-bottom: 1px solid var(--color-border);
        box-shadow: var(--shadow-lg);
        padding: var(--space-2) var(--container-padding) var(--space-3);
    }

    .primary-nav[hidden] {
        display: none;
    }

    .nav-list {
        flex-direction: column;
        align-items: stretch;
        gap: 0.15rem;
    }

    .nav-link {
        padding: 0.75rem 0.5rem;
    }

    .nav-dropdown > summary {
        padding: 0.75rem 0.5rem;
    }

    .nav-dropdown__panel a {
        padding-left: 1.4rem;
    }

    .site-header__actions .nav-login {
        display: none;
    }
}

@media (min-width: 1024px) {
    .primary-nav[hidden] {
        display: flex;
    }
}

/* Sehr schmale Viewports (320-420px): Header-Inhalte (Logo + Jetzt-starten-Button
   + Menü-Button) sind sonst breiter als der verfügbare Platz und erzeugen eine
   horizontale Scrollbar. */
@media (max-width: 420px) {
    :root {
        --container-padding: 1rem;
    }

    .logo {
        font-size: 0.95rem;
        gap: 0.4rem;
    }

    .logo__mark {
        width: 28px;
        height: 28px;
    }

    .site-header__actions {
        gap: 0.4rem;
    }

    .site-header__actions .btn {
        padding: 0.5rem 0.7rem;
        font-size: 0.8125rem;
    }

    .nav-toggle {
        width: 38px;
        height: 38px;
    }
}

/* ---------- Sektionen ---------- */

.section {
    padding-block: var(--space-7);
}

.section--tight {
    padding-block: var(--space-6);
}

.section--dark {
    background: var(--color-dark-bg);
    color: var(--color-dark-text);
}

.section--alt {
    background: var(--color-surface-alt);
}

.section-head {
    max-width: 46rem;
    margin-bottom: var(--space-5);
}

.section-head--center {
    margin-inline: auto;
    text-align: center;
}

/* ---------- Grid-Hilfen ---------- */

.grid {
    display: grid;
    gap: var(--space-4);
}

.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: 900px) {
    .grid-3,
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
}

/* ---------- Footer ---------- */

.site-footer {
    background: var(--color-dark-bg);
    color: var(--color-dark-muted);
    padding-block: var(--space-6) var(--space-4);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.2fr repeat(5, 1fr);
    gap: var(--space-4);
    padding-bottom: var(--space-5);
    border-bottom: 1px solid var(--color-dark-border);
}

.footer-brand p {
    margin-top: var(--space-2);
    max-width: 28ch;
    font-size: 0.9375rem;
}

.footer-col h2 {
    font-size: 0.8125rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--color-dark-text);
    margin-bottom: var(--space-2);
}

.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.footer-col a {
    font-size: 0.9375rem;
}

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

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-2);
    padding-top: var(--space-3);
    font-size: 0.875rem;
}

@media (max-width: 1100px) {
    .footer-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .footer-brand {
        grid-column: 1 / -1;
    }
}

@media (max-width: 700px) {
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }
}

/* ---------- Breadcrumb ---------- */

.breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.875rem;
    color: var(--color-muted);
    padding-top: var(--space-3);
}

.breadcrumb a {
    color: var(--color-muted);
}

.breadcrumb a:hover {
    color: var(--color-primary);
}

.breadcrumb li {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.breadcrumb li:not(:last-child)::after {
    content: "/";
    opacity: 0.5;
}

.breadcrumb li[aria-current="page"] {
    color: var(--color-text);
}