:root {
    --background: #070a12;
    --background-secondary: #0b1020;
    --surface: rgba(17, 24, 39, 0.88);
    --surface-hover: rgba(30, 41, 59, 0.92);
    --border: rgba(148, 163, 184, 0.18);
    --border-strong: rgba(129, 140, 248, 0.42);
    --text: #f8fafc;
    --text-muted: #a8b3c7;
    --accent: #8b5cf6;
    --accent-secondary: #ec4899;
    --accent-light: #c4b5fd;
    --shadow: 0 24px 70px rgba(0, 0, 0, 0.38);
    --radius: 22px;
    --content-width: 1180px;
}

* {
    box-sizing: border-box;
}

html {
    min-height: 100%;
    scroll-behavior: smooth;
}

body.ks-site {
    min-height: 100vh;
    margin: 0;
    color: var(--text);
    background:
        radial-gradient(
            circle at 10% 0%,
            rgba(139, 92, 246, 0.18),
            transparent 33rem
        ),
        radial-gradient(
            circle at 90% 15%,
            rgba(236, 72, 153, 0.12),
            transparent 28rem
        ),
        linear-gradient(
            145deg,
            var(--background),
            var(--background-secondary)
        );
    font-family:
        Inter,
        ui-sans-serif,
        system-ui,
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        sans-serif;
    line-height: 1.65;
}

a {
    color: var(--accent-light);
    text-decoration-thickness: 1px;
    text-underline-offset: 0.2em;
}

a:hover {
    color: #ffffff;
}

.site-shell {
    display: flex;
    min-height: 100vh;
    flex-direction: column;
}

/* Kopfbereich */

.site-header {
    position: sticky;
    z-index: 50;
    top: 0;
    border-bottom: 1px solid var(--border);
    background: rgba(7, 10, 18, 0.82);
    backdrop-filter: blur(18px);
}

.site-header-inner {
    display: flex;
    width: min(calc(100% - 40px), var(--content-width));
    min-height: 82px;
    margin: 0 auto;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
}

.site-brand {
    display: inline-flex;
    min-width: max-content;
    align-items: center;
    gap: 13px;
    color: var(--text);
    text-decoration: none;
}

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

.site-brand-mark {
    display: grid;
    width: 46px;
    height: 46px;
    place-items: center;
    border: 1px solid rgba(196, 181, 253, 0.35);
    border-radius: 14px;
    background:
        linear-gradient(
            135deg,
            var(--accent),
            var(--accent-secondary)
        );
    box-shadow: 0 10px 30px rgba(139, 92, 246, 0.32);
    color: #ffffff;
    font-size: 0.96rem;
    font-weight: 850;
    letter-spacing: 0.08em;
}

.site-brand-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.site-brand-text strong {
    font-size: 1.08rem;
    letter-spacing: 0.015em;
}

.site-brand-text small {
    margin-top: 4px;
    color: var(--text-muted);
    font-size: 0.72rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

/* Navigation */

.main-navigation ul,
.footer-navigation ul {
    display: flex;
    margin: 0;
    padding: 0;
    align-items: center;
    gap: 6px;
    list-style: none;
}

.navigation-link {
    display: inline-flex;
    padding: 10px 13px;
    border: 1px solid transparent;
    border-radius: 11px;
    color: var(--text-muted);
    font-size: 0.91rem;
    font-weight: 650;
    text-decoration: none;
    transition:
        color 160ms ease,
        border-color 160ms ease,
        background 160ms ease,
        transform 160ms ease;
}

.navigation-link:hover {
    border-color: var(--border);
    background: rgba(148, 163, 184, 0.08);
    color: #ffffff;
    transform: translateY(-1px);
}

.navigation-link.is-active {
    border-color: var(--border-strong);
    background:
        linear-gradient(
            135deg,
            rgba(139, 92, 246, 0.23),
            rgba(236, 72, 153, 0.13)
        );
    color: #ffffff;
}

/* Inhaltsbereich */

.site-main {
    display: flex;
    width: min(calc(100% - 40px), var(--content-width));
    margin: 0 auto;
    padding: 70px 0;
    flex: 1;
    align-items: flex-start;
}

.content-card {
    width: 100%;
    padding: clamp(28px, 5vw, 68px);
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background:
        linear-gradient(
            145deg,
            rgba(17, 24, 39, 0.95),
            rgba(9, 14, 27, 0.92)
        );
    box-shadow: var(--shadow);
}

.content-card::before {
    display: block;
    width: 74px;
    height: 4px;
    margin-bottom: 30px;
    border-radius: 999px;
    background:
        linear-gradient(
            90deg,
            var(--accent),
            var(--accent-secondary)
        );
    content: "";
}

.content-card h1,
.content-card h2,
.content-card h3,
.content-card h4 {
    margin-top: 0;
    color: #ffffff;
    line-height: 1.18;
}

.content-card h1,
.content-card h2 {
    font-size: clamp(2rem, 5vw, 3.6rem);
    letter-spacing: -0.045em;
}

.content-card h3 {
    margin-top: 2.2rem;
    font-size: 1.35rem;
}

.content-card p {
    max-width: 78ch;
    color: #d7deea;
}

.content-card p:first-of-type {
    color: #ffffff;
    font-size: 1.1rem;
}

.content-card ul,
.content-card ol {
    padding-left: 1.35rem;
    color: #d7deea;
}

.content-card li {
    margin: 0.35rem 0;
}

.content-card .frame {
    margin: 0;
}

.content-card .frame + .frame {
    margin-top: 36px;
}

/* Footer */

.site-footer {
    border-top: 1px solid var(--border);
    background: rgba(5, 8, 15, 0.7);
}

.site-footer-inner {
    display: flex;
    width: min(calc(100% - 40px), var(--content-width));
    min-height: 90px;
    margin: 0 auto;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.site-footer p {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.88rem;
}

.footer-link {
    display: inline-flex;
    padding: 7px 9px;
    border-radius: 8px;
    color: var(--text-muted);
    font-size: 0.86rem;
    text-decoration: none;
}

.footer-link:hover,
.footer-link.is-active {
    background: rgba(148, 163, 184, 0.08);
    color: #ffffff;
}

/* Smartphone und Tablet */

@media (max-width: 940px) {
    .site-header-inner {
        padding: 17px 0;
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }

    .main-navigation {
        width: 100%;
        overflow-x: auto;
        padding-bottom: 3px;
    }

    .main-navigation ul {
        width: max-content;
    }

    .site-main {
        padding: 38px 0;
    }
}

@media (max-width: 640px) {
    .site-header-inner,
    .site-main,
    .site-footer-inner {
        width: min(calc(100% - 24px), var(--content-width));
    }

    .site-brand-mark {
        width: 42px;
        height: 42px;
        border-radius: 12px;
    }

    .navigation-link {
        padding: 9px 11px;
        font-size: 0.84rem;
    }

    .content-card {
        padding: 26px 21px;
        border-radius: 17px;
    }

    .content-card h1,
    .content-card h2 {
        font-size: 2rem;
    }

    .site-footer-inner {
        padding: 25px 0;
        flex-direction: column;
        align-items: flex-start;
    }
}