/* Gestaltung: Briefblatt + Unterschriftsfeld.
   Nur Systemschriften, damit keine Verbindung zu Fremdservern nötig ist. */
:root {
    --accent: #E3000F;          /* SPD-Rot: Kopfzeile, Überschrift, Unterschriftsfeld, Hauptknöpfe */
    --ink: #14213D;             /* Tintenblau: Text, Kopfzeile, Unterschriftsfeld */
    --text: #14213D;
    --muted: #5A6577;
    --line: #D9DEE7;
    --paper: #F3F5F8;
    --sheet: #FFFFFF;
    --on-ink: #FFFFFF;
    --on-ink-muted: #C4CDE0;
    --on-red: #FFFFFF;
    --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, "Times New Roman", serif;
    --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-body: var(--sans);
    --font-head: var(--serif);
    --page: 72rem;
}

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

html { scroll-behavior: smooth; scroll-padding-top: 5rem; }

body {
    margin: 0;
    font-family: var(--sans);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--ink);
    background: var(--paper);
    -webkit-font-smoothing: antialiased;
}

a { color: var(--ink); text-decoration-color: var(--accent); text-underline-offset: .18em; text-decoration-thickness: 2px; }
a:hover { color: var(--accent); }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }

.skip { position: absolute; left: -9999px; }
.skip:focus { left: 1rem; top: 1rem; background: #fff; padding: .5rem 1rem; z-index: 20; }

.wrap { width: min(100% - 2.5rem, 760px); margin-inline: auto; }
.wrap--wide { width: min(100% - 2.5rem, var(--page)); margin-inline: auto; }

/* Kopfzeile */
.topbar {
    position: sticky; top: 0; z-index: 10;
    display: flex; align-items: center; justify-content: space-between; gap: 1rem;
    padding: .75rem max(1.25rem, calc((100% - var(--page)) / 2));
    background: var(--accent);
    color: var(--on-red);
}
.brand { font: 700 1.1rem/1.2 var(--serif); color: var(--on-red); text-decoration: none; letter-spacing: -.005em; }
.brand:hover { color: var(--on-red); }
.topbar :focus-visible { outline-color: #fff; }
.topbar .pill { border-color: var(--ink); }
.topbar .pill:hover { background: #fff; border-color: #fff; color: var(--accent); }
@media (max-width: 30rem) { .brand { font-size: .98rem; } }

/* Knöpfe (eckig, nicht rund) */
.pill {
    display: inline-block; cursor: pointer;
    padding: .8rem 1.4rem; border-radius: 3px;
    font: 600 .95rem/1.1 var(--sans);
    text-decoration: none; text-align: center;
    border: 2px solid var(--ink);
    background: var(--ink); color: #fff;
    transition: background-color .12s ease, color .12s ease, border-color .12s ease;
}
.pill:hover { background: #fff; color: var(--ink); }
.pill--small { padding: .55rem 1rem; font-size: .88rem; white-space: nowrap; }
.pill--solid { background: var(--accent); border-color: var(--accent); color: #fff; }
.pill--solid:hover { background: #fff; color: var(--accent); }

/* Titelbereich */
.hero { padding: clamp(2.5rem, 7vw, 5rem) 0 clamp(2rem, 5vw, 3.5rem); }
.kicker { margin: 0 0 .9rem; font: italic 400 1.15rem/1.4 var(--serif); color: var(--muted); }
h1 {
    margin: 0 0 1.4rem; max-width: 17em;
    font: 700 clamp(2.2rem, 6.4vw, 4.2rem)/1.04 var(--serif);
    letter-spacing: -.025em; color: var(--accent);
    overflow-wrap: break-word; hyphens: auto;
}
.lead { margin: 0 0 1.8rem; max-width: 33em; font: 400 clamp(1.15rem, 2.3vw, 1.4rem)/1.55 var(--serif); }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 1.4rem; margin: 0 0 1.6rem; }
.hero-actions a:not(.pill) { font-weight: 600; }
.counter { margin: 0; font: 400 1.05rem/1.4 var(--sans); color: var(--muted); }
.counter strong { font: 700 1.6rem/1 var(--serif); color: var(--accent); margin-right: .15em; }
.featured { margin: 1rem 0 0; max-width: 40em; font-size: .98rem; line-height: 1.7; color: var(--muted); }

/* Brief + Unterschriftsfeld */
.layout {
    width: min(100% - 2.5rem, var(--page)); margin-inline: auto;
    display: grid; grid-template-columns: minmax(0, 1fr); gap: 2.5rem;
    align-items: start; padding-bottom: 3.5rem;
}
@media (min-width: 62rem) {
    .layout { grid-template-columns: minmax(0, 1fr) 21.5rem; gap: 3.5rem; }
    .panel { position: sticky; top: 5rem; }
}

.sheet {
    background: var(--sheet); border: 1px solid var(--line);
    padding: clamp(1.5rem, 5vw, 3.5rem);
}
.letter h2 { font: 700 clamp(1.6rem, 3.6vw, 2.1rem)/1.15 var(--serif); letter-spacing: -.015em; margin: 0 0 1.2rem; }
.letter h2:not(:first-child) { margin-top: 2.8rem; }
.letter h3 { font: italic 700 1.25rem/1.3 var(--serif); margin: 2rem 0 .6rem; }
.letter p, .letter li { font: 400 1.1875rem/1.75 var(--serif); max-width: 36em; margin: 0 0 1.05em; }
.letter .closing { font: 700 1.45rem/1.4 var(--serif); letter-spacing: -.01em; color: var(--accent); margin-top: 2.2rem; padding-top: 1.6rem; border-top: 1px solid var(--line); }
.letter .to-sign { margin-top: 2rem; }
@media (min-width: 62rem) { .letter .to-sign { display: none; } }

.share { margin-top: 3rem; padding-top: 1.6rem; border-top: 1px solid var(--line); }
.share h2 { font: 700 1.35rem/1.2 var(--serif); margin: 0 0 .5rem; }
.share p { margin: 0 0 1rem; max-width: 34em; font: 400 1.05rem/1.65 var(--sans); color: var(--muted); }
.chips { display: flex; flex-wrap: wrap; gap: .6rem; margin: 0; }
.chip {
    padding: .45rem .9rem; border: 1px solid var(--ink); border-radius: 3px;
    color: var(--ink); text-decoration: none; font-weight: 600; font-size: .92rem;
}
.chip:hover { background: var(--ink); color: #fff; }

/* Unterschriftsfeld (rot) */
.panel { background: var(--accent); color: var(--on-red); padding: clamp(1.5rem, 4vw, 2rem); }
.panel h2 { font: 700 1.55rem/1.2 var(--serif); letter-spacing: -.01em; margin: 0 0 .7rem; color: var(--on-red); }
.panel p { margin: 0 0 1rem; color: var(--on-red); font-size: .96rem; line-height: 1.55; }
.panel a { color: var(--on-red); text-decoration-color: var(--on-red); }
.panel a:hover { color: var(--on-red); text-decoration-thickness: 3px; }
.panel :focus-visible { outline-color: #fff; }

.sign { display: grid; gap: 1.25rem; margin-top: 1.4rem; }
.sign label { display: grid; gap: .2rem; font-weight: 600; font-size: .9rem; color: var(--on-red); }
.sign .hint { font-weight: 400; }
.panel .sign input[type=text], .panel .sign input[type=email] {
    font: italic 400 1.2rem/1.3 var(--serif); color: #fff;
    padding: .45rem 0 .5rem; background: transparent;
    border: 0; border-bottom: 2px solid rgba(255,255,255,.8); border-radius: 0;
}
.panel .sign input[type=text]:focus, .panel .sign input[type=email]:focus { border-bottom-color: #fff; outline: none; box-shadow: 0 2px 0 0 #fff; }
.sign .check { grid-template-columns: auto 1fr; align-items: start; gap: .7rem; font-weight: 400; font-size: .85rem; line-height: 1.5; color: var(--on-red); }
.sign .check input { margin-top: .2rem; width: 1.1rem; height: 1.1rem; accent-color: var(--ink); }
.panel .pill--solid { width: 100%; padding: 1rem 1.4rem; font-size: 1rem; background: var(--ink); border-color: var(--ink); color: #fff; }
.panel .pill--solid:hover { background: #fff; border-color: #fff; color: var(--accent); }
.hp { position: absolute; left: -9999px; height: 0; overflow: hidden; }

.flash { padding: .8rem 1rem; border-radius: 3px; font-weight: 500; font-size: .95rem; margin: 1rem 0 0; }
.flash--ok  { background: #E5F4EA; color: #14532D; border: 1px solid #B7E4C7; }
.flash--err { background: #FFFFFF; color: #7F1D1D; border: 1px solid #F5B5B5; }

/* Unterzeichnende */
.signers-block { background: var(--sheet); border-top: 1px solid var(--line); padding: clamp(2.5rem, 6vw, 4rem) 0; }
.signers-block h2 { font: 700 clamp(1.5rem, 3.4vw, 2rem)/1.2 var(--serif); letter-spacing: -.015em; margin: 0 0 1.5rem; }
.signers { list-style: none; margin: 0; padding: 0; columns: 3 15rem; column-gap: 2.5rem; }
.signers li { break-inside: avoid; padding: .35rem 0; font: italic 400 1.2rem/1.35 var(--serif); }
.signers .aff { display: block; font: 400 .85rem/1.3 var(--sans); color: var(--muted); }
.signers-empty { color: var(--muted); max-width: 34em; }

/* Fußzeile */
.footer { background: var(--sheet); border-top: 6px solid var(--accent); padding: 1.4rem 0 2.2rem; font-size: .9rem; }
.footer .wrap, .footer .wrap--wide { display: flex; gap: 1.5rem; flex-wrap: wrap; }
.footer a { color: var(--muted); }
.footer a:hover { color: var(--accent); }

/* Rechtsseiten und Verwaltung */
.legal { padding: 3rem 0 4rem; }
.legal h1 { font-size: clamp(2rem, 6vw, 2.8rem); letter-spacing: -.02em; }
.legal h2 { font: 700 1.4rem/1.25 var(--serif); margin: 2rem 0 .6rem; }
.legal .note { background: #FFF7E0; border: 1px solid #F0D98A; padding: .9rem 1.1rem; border-radius: 3px; font-size: .95rem; }

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .pill { transition: none; }
}