:root {
    --bg: #f5f8fc;
    --bg-alt: #e6eef8;
    --surface: #ffffff;
    --text: #14243a;
    --muted: #55657a;
    --accent: #0a5aa8;
    --accent-dark: #063f78;
    --border: #d5e1ef;
    --radius: 14px;
    --max: 1100px;
    --font-head: "Fraunces", Georgia, serif;
    --font-body: "Inter", system-ui, -apple-system, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-body);
    font-size: 1.05rem;
    line-height: 1.65;
}

img { max-width: 100%; display: block; }
a { color: var(--accent); }
a:hover { color: var(--accent-dark); }

h1, h2, h3 {
    font-family: var(--font-head);
    line-height: 1.15;
    margin: 0 0 .6em;
}
h1 { font-size: clamp(2rem, 5vw, 3.2rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.2rem); }
h3 { font-size: 1.25rem; }

.container {
    width: 100%;
    max-width: var(--max);
    margin: 0 auto;
    padding: 0 16px;
}

/* Header */
.site-header {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 10;
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    min-height: 72px;
}
.brand {
    display: flex;
    align-items: center;
    gap: .7rem;
    text-decoration: none;
    color: var(--text);
}
.brand-mark {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: var(--accent);
    color: #fff;
    display: grid;
    place-items: center;
    font-family: var(--font-head);
    font-weight: 700;
    font-size: 1.3rem;
}
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-text small { color: var(--muted); font-size: .8rem; }

.main-nav ul {
    list-style: none;
    display: flex;
    gap: .3rem;
    margin: 0;
    padding: 0;
}
.main-nav a {
    display: block;
    padding: .5rem .9rem;
    border-radius: 999px;
    text-decoration: none;
    color: var(--text);
    font-weight: 500;
}
.main-nav a:hover { background: var(--bg-alt); color: var(--text); }
.main-nav a[aria-current="page"] { background: var(--accent); color: #fff; }

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
}

.nav-toggle {
    display: none;
    width: 44px;
    height: 44px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--surface);
    cursor: pointer;
    place-items: center;
    padding: 0;
}
.nav-toggle-bars,
.nav-toggle-bars::before,
.nav-toggle-bars::after {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: transform .2s, background .2s;
}
.nav-toggle-bars { position: relative; }
.nav-toggle-bars::before,
.nav-toggle-bars::after {
    content: "";
    position: absolute;
    left: 0;
}
.nav-toggle-bars::before { top: -6px; }
.nav-toggle-bars::after { top: 6px; }
.nav-open .nav-toggle-bars { background: transparent; }
.nav-open .nav-toggle-bars::before { transform: translateY(6px) rotate(45deg); }
.nav-open .nav-toggle-bars::after { transform: translateY(-6px) rotate(-45deg); }

/* Hero */
.hero { padding: 4rem 0 3rem; }
.hero-inner {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 3rem;
    align-items: center;
}
.eyebrow {
    text-transform: uppercase;
    letter-spacing: .08em;
    font-size: .8rem;
    font-weight: 600;
    color: var(--accent);
    margin: 0 0 .8rem;
}
.lead { font-size: 1.15rem; color: var(--muted); max-width: 60ch; }

.photo-placeholder {
    aspect-ratio: 4 / 5;
    border-radius: var(--radius);
    background:
        radial-gradient(circle at 30% 30%, #b9d3ef 0, transparent 55%),
        radial-gradient(circle at 70% 75%, #7fa9d8 0, transparent 50%),
        var(--bg-alt);
    display: grid;
    place-items: center;
    color: var(--muted);
    font-weight: 500;
}

.btn {
    display: inline-block;
    margin-top: .8rem;
    padding: .85rem 1.6rem;
    background: var(--accent);
    color: #fff;
    border-radius: 999px;
    text-decoration: none;
    font-weight: 600;
    transition: background .15s;
}
.btn:hover { background: var(--accent-dark); color: #fff; }

/* Sections */
.section { padding: 3.5rem 0; }
.section-alt { background: var(--bg-alt); }
.prose { max-width: 760px; }

.cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.2rem;
    margin-top: 1.5rem;
}
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
}
.card p { margin: 0; color: var(--muted); }
.cta-line { margin-top: 2rem; font-weight: 500; }

/* Events iframe */
.iframe-wrap {
    margin-top: 2rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}
.iframe-wrap iframe {
    display: block;
    width: 100%;
    height: 1200px; /* Startwert, wird per JS an den Inhalt angepasst */
    border: 0;
}
.iframe-fallback { margin-top: 1rem; font-size: .95rem; color: var(--muted); }

/* Footer */
.site-footer {
    border-top: 1px solid var(--border);
    background: var(--surface);
    padding: 1.5rem 0;
    font-size: .9rem;
    color: var(--muted);
}
.footer-inner {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: .5rem;
}
.footer-inner p { margin: 0; }

/* Mobile */
@media (max-width: 760px) {
    .hero { padding: 2.5rem 0 2rem; }
    .hero-inner { grid-template-columns: 1fr; gap: 2rem; }
    .hero-photo { order: -1; max-width: 320px; }
    .cards { grid-template-columns: 1fr; }
    .header-inner { position: relative; }
    .nav-toggle { display: grid; }
    .main-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--surface);
        border-bottom: 1px solid var(--border);
        box-shadow: 0 12px 24px rgba(20, 36, 58, .08);
        padding: .5rem 16px 1rem;
    }
    .nav-open .main-nav { display: block; }
    .main-nav ul { flex-direction: column; gap: .25rem; }
    .main-nav a { padding: .8rem 1rem; border-radius: 10px; font-size: 1.05rem; }
}