/* ==============================
   Design Tokens (Farbsystem)
   Zweck:
   - brand: Marken- und Primärfarben
   - background: Seiten-/Flächenhintergründe
   - text: Haupttext und sekundärer Text
   - accent/buttons: Hervorhebungen, Interaktion
   - border: Linien und Kartenränder
   - state: positive Hinweise / Warnhinweise
   ============================== */
:root {
    --color-brand-primary: #1d4ed8;      /* Brand: primär (Header, Markenelemente) */
    --color-brand-secondary: #f59e0b;    /* Brand: sekundär (Akzente, Highlights) */
    --color-brand-tertiary: #22c55e;     /* Brand: ergänzend (Lern-/Erfolgsakzente) */

    --color-bg-page: #f7fafc;            /* Hintergrund: gesamte Seite */
    --color-bg-surface: #ffffff;         /* Hintergrund: Cards/Panels */
    --color-bg-alt: #e8f0ff;             /* Hintergrund: abgesetzte Sektionen */
    --color-bg-hero: #102a56;            /* Hintergrund: Hero-Bereich */

    --color-text-primary: #10213f;       /* Text: Standard-Fließtext */
    --color-text-secondary: #445069;     /* Text: ergänzend/Meta */
    --color-text-inverse: #ffffff;       /* Text: auf dunklem Hintergrund */

    --color-accent: #f59e0b;             /* Akzentfarbe */
    --color-accent-strong: #c97a00;      /* Akzent stark (Hover/Fokus-Nuancen) */

    --color-button-primary-bg: #f59e0b;  /* Button primär Hintergrund */
    --color-button-primary-text: #10213f;/* Button primär Text */
    --color-button-secondary-bg: transparent; /* Button sekundär Hintergrund */
    --color-button-secondary-text: #ffffff;   /* Button sekundär Text */

    --color-border-soft: #d4dfef;        /* weiche Rahmenlinien */
    --color-border-strong: #a9bdd8;      /* stärkere Rahmenlinien */

    --color-state-success: #15803d;      /* positive Hinweise */
    --color-state-warning: #b45309;      /* Warn-/Platzhalter-Hinweise */

    --shadow-card: 0 10px 24px rgba(16, 33, 63, 0.1);
    --shadow-focus: 0 0 0 3px rgba(29, 78, 216, 0.35);

    --radius-s: 0.5rem;
    --radius-m: 0.8rem;
    --radius-l: 1.2rem;

    --container-width: 70rem;
}

/* ==============================
   Reset / Base
   ============================== */
* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    color: var(--color-text-primary);
    background: var(--color-bg-page);
    font-family: "Inter", "Segoe UI", Arial, sans-serif;
    line-height: 1.6;
}

img,
svg {
    max-width: 100%;
    display: block;
}

a {
    color: inherit;
}

h1,
h2,
h3,
p,
ul {
    margin-top: 0;
}

h1,
h2,
h3 {
    line-height: 1.2;
}

h1 {
    font-size: clamp(1.9rem, 3.6vw, 3rem);
}

h2 {
    font-size: clamp(1.5rem, 2.9vw, 2.2rem);
}

h3 {
    font-size: clamp(1.1rem, 2vw, 1.3rem);
}

ul {
    padding-left: 1.2rem;
}

:focus-visible {
    outline: none;
    box-shadow: var(--shadow-focus);
    border-radius: var(--radius-s);
}

/* ==============================
   Layout
   ============================== */
.container {
    width: min(var(--container-width), calc(100% - 2rem));
    margin-inline: auto;
}

.section {
    padding: 4.5rem 0;
}

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

.split-layout {
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: 1.5rem;
    align-items: start;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
}

/* ==============================
   Components
   ============================== */
.skip-link {
    position: absolute;
    top: 0.6rem;
    left: 0.6rem;
    z-index: 20;
    transform: translateY(-150%);
    padding: 0.55rem 0.8rem;
    border-radius: var(--radius-s);
    background: var(--color-text-primary);
    color: var(--color-text-inverse);
    text-decoration: none;
}

.skip-link:focus-visible {
    transform: translateY(0);
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 10;
    border-bottom: 1px solid var(--color-border-soft);
    background: color-mix(in srgb, var(--color-bg-surface) 92%, transparent);
    backdrop-filter: blur(8px);
}

.header-inner {
    min-height: 4.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    justify-content: space-between;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 0.65rem;
    text-decoration: none;
    font-weight: 700;
}

.brand-logo {
    width: 2.2rem;
    height: 2.2rem;
    object-fit: contain;
}

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

.nav-toggle {
    display: none;
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius-s);
    background: var(--color-bg-surface);
    color: var(--color-text-primary);
    font: inherit;
    padding: 0.45rem 0.8rem;
    cursor: pointer;
}

.nav-list {
    margin: 0;
    padding: 0;
    list-style: none;
    display: flex;
    gap: 0.35rem;
}

.nav-list a {
    display: inline-flex;
    min-height: 2.4rem;
    align-items: center;
    text-decoration: none;
    color: var(--color-text-primary);
    font-weight: 600;
    padding: 0 0.65rem;
    border-radius: var(--radius-s);
}

.nav-list a:hover,
.nav-list a:focus-visible,
.nav-list a[aria-current="true"] {
    background: color-mix(in srgb, var(--color-brand-secondary) 24%, var(--color-bg-surface));
    color: var(--color-accent-strong);
}

.hero {
    background:
        radial-gradient(circle at 88% 15%, color-mix(in srgb, var(--color-brand-secondary) 35%, transparent), transparent 35%),
        linear-gradient(130deg, var(--color-bg-hero), color-mix(in srgb, var(--color-brand-primary) 72%, var(--color-bg-hero)));
    color: var(--color-text-inverse);
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 1.2rem;
    align-items: center;
}

.eyebrow {
    display: inline-flex;
    margin-bottom: 0.8rem;
    padding: 0.15rem 0.5rem;
    border-radius: 999px;
    background: color-mix(in srgb, var(--color-brand-secondary) 24%, transparent);
    color: var(--color-text-inverse);
    font-weight: 700;
    font-size: 0.82rem;
    letter-spacing: 0.03em;
}

.cta-row {
    display: flex;
    gap: 0.7rem;
    flex-wrap: wrap;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 2.9rem;
    padding: 0 1rem;
    border-radius: var(--radius-s);
    border: 2px solid transparent;
    font-weight: 700;
    text-decoration: none;
    transition: transform 150ms ease, box-shadow 150ms ease;
}

.button:hover,
.button:focus-visible {
    transform: translateY(-1px);
}

.button-primary {
    background: var(--color-button-primary-bg);
    color: var(--color-button-primary-text);
}

.button-secondary {
    background: var(--color-button-secondary-bg);
    color: var(--color-button-secondary-text);
    border-color: color-mix(in srgb, var(--color-text-inverse) 70%, transparent);
}

.hero-visual {
    min-height: 16rem;
    border-radius: var(--radius-l);
    border: 2px dashed color-mix(in srgb, var(--color-brand-secondary) 70%, transparent);
    background: color-mix(in srgb, var(--color-text-inverse) 10%, transparent);
    position: relative;
    display: grid;
    place-items: center;
}

.hero-visual-label {
    margin: 0;
    color: var(--color-text-inverse);
    font-weight: 600;
    text-align: center;
    padding: 0 1rem;
}

.hero-visual-teaser {
    font-size: clamp(5rem, 12vw, 8rem);
    font-weight: 800;
    line-height: 1;
    color: var(--color-brand-secondary);
}

.teaser {
    color: var(--color-accent-strong);
    font-size: 1.2rem;
}

.chip {
    position: absolute;
    border-radius: 0.5rem;
    background: color-mix(in srgb, var(--color-text-inverse) 60%, transparent);
    border: 1px solid color-mix(in srgb, var(--color-brand-primary) 45%, transparent);
}

.chip-1 {
    width: 3rem;
    height: 3rem;
    top: 14%;
    left: 10%;
}

.chip-2 {
    width: 4rem;
    height: 2.4rem;
    top: 60%;
    left: 20%;
}

.chip-3 {
    width: 2.7rem;
    height: 4rem;
    top: 24%;
    right: 12%;
}

.panel,
.card,
.faq-item {
    border: 1px solid var(--color-border-soft);
    border-radius: var(--radius-m);
    background: var(--color-bg-surface);
    box-shadow: var(--shadow-card);
}

.panel,
.card {
    padding: 1rem;
}

.card {
    display: grid;
    gap: 0.55rem;
}

.card-icon {
    width: 2.2rem;
    height: 2.2rem;
    border-radius: 50%;
    display: grid;
    place-items: center;
    color: var(--color-text-inverse);
    font-weight: 700;
    background: var(--color-brand-primary);
}

.card p,
.panel,
.hint,
.faq-item p,
.site-footer p {
    color: var(--color-text-secondary);
}

.hint {
    margin-top: 1rem;
    color: var(--color-state-warning);
    font-weight: 600;
}

.faq-list {
    display: grid;
    gap: 0.8rem;
}

.faq-item summary {
    cursor: pointer;
    font-weight: 700;
    color: var(--color-text-primary);
    padding: 1rem;
}

.faq-item p {
    padding: 0 1rem 1rem;
    margin: 0;
}

.cta-section {
    border-top: 1px solid var(--color-border-soft);
}

.site-footer {
    padding: 1.4rem 0;
    background: var(--color-text-primary);
    color: color-mix(in srgb, var(--color-text-inverse) 88%, transparent);
}

.footer-inner {
    display: flex;
    flex-wrap: wrap;
    gap: 0.7rem;
    justify-content: space-between;
}

.legal-content {
    max-width: 45rem;
}

.legal-content h2 {
    margin-top: 2.5rem;
}

/* ==============================
   Utilities
   ============================== */
.is-hidden {
    display: none !important;
}

/* ==============================
   Responsive
   ============================== */
@media (max-width: 56rem) {
    .hero-grid,
    .split-layout {
        grid-template-columns: 1fr;
    }

    .card-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .site-nav {
        width: 100%;
    }

    .nav-list {
        flex-wrap: wrap;
    }
}

@media (max-width: 45rem) {
    .section {
        padding: 3.2rem 0;
    }

    .nav-toggle {
        display: inline-flex;
    }

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

    .js .site-nav.is-open {
        display: block;
    }

    .js .site-nav .nav-list {
        flex-direction: column;
        align-items: stretch;
        padding: 0.35rem 0;
    }

    .js .site-nav .nav-list a {
        padding: 0.5rem 0.6rem;
    }

    .no-js .site-nav {
        display: block;
    }

    .card-grid {
        grid-template-columns: 1fr;
    }

    .button {
        width: 100%;
    }
}

/* ==============================
   Reduced Motion
   ============================== */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}