/* Erpira Website – Farben und Typografie laut Softwarekonzept, Abschnitt 3 (Inter lokal nicht eingebunden: Systemschrift als Fallback). */
:root {
    --primary: #0078d4;
    --primary-dark: #005fa8;
    --secondary: #00b8d9;
    --tertiary: #14b8a6;
    --navy: #0f2d4a;
    --bg: #f8fafc;
    --surface: #ffffff;
    --text: #1e293b;
    --muted: #64748b;
    --border: #e2e8f0;
    --danger: #c0392b;
    --radius: 12px;
    --shadow: 0 1px 2px rgba(15, 45, 74, .06), 0 8px 24px rgba(15, 45, 74, .06);
    --font: Inter, "Segoe UI", system-ui, -apple-system, Roboto, Arial, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
    margin: 0;
    font-family: var(--font);
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

img, svg { max-width: 100%; }
a { color: var(--primary); }
h1, h2, h3 { color: var(--navy); line-height: 1.2; margin: 0 0 .6em; letter-spacing: -.01em; }
h1 { font-size: clamp(2rem, 4.5vw, 3.25rem); font-weight: 800; }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); font-weight: 700; }
h3 { font-size: 1.15rem; font-weight: 700; }
p { margin: 0 0 1em; }
code { font-family: ui-monospace, Consolas, monospace; font-size: .9em; background: #eef2f7; padding: .1em .35em; border-radius: 4px; }

.container { width: min(1120px, 100% - 32px); margin-inline: auto; }
.narrow { width: min(820px, 100% - 32px); }
.center { text-align: center; }
.muted { color: var(--muted); }
.spaced { margin-top: 2.5rem; }

/* Kopfzeile */
.site-header {
    position: sticky; top: 0; z-index: 10;
    background: rgba(255, 255, 255, .92);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; min-height: 64px; gap: 16px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: var(--navy); font-weight: 800; font-size: 1.3rem; }
.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav a { text-decoration: none; color: var(--navy); padding: 8px 14px; border-radius: 8px; font-weight: 500; }
.main-nav a:hover, .main-nav a.active { background: #eaf3fb; color: var(--primary-dark); }
.main-nav a.button { color: #fff; margin-left: 8px; }
.main-nav a.button:hover { background: var(--primary-dark); color: #fff; }
.nav-toggle { position: absolute; opacity: 0; pointer-events: none; }
.nav-burger { display: none; width: 40px; height: 40px; border-radius: 8px; cursor: pointer; align-items: center; justify-content: center; }
.nav-burger span, .nav-burger span::before, .nav-burger span::after {
    display: block; width: 22px; height: 2px; background: var(--navy); position: relative; content: ""; border-radius: 2px;
}
.nav-burger span::before { position: absolute; top: -7px; }
.nav-burger span::after { position: absolute; top: 7px; }
.nav-toggle:focus-visible + .nav-burger { outline: 2px solid var(--primary); }

/* Schaltflächen */
.button {
    display: inline-block; border: 0; cursor: pointer; font: inherit; font-weight: 600;
    background: var(--primary); color: #fff; text-decoration: none;
    padding: 12px 22px; border-radius: 10px; transition: background .15s, transform .15s;
}
.button:hover { background: var(--primary-dark); }
.button:active { transform: translateY(1px); }
.button-small { padding: 7px 14px; font-size: .92rem; border-radius: 8px; }
.button-ghost { background: transparent; color: var(--primary-dark); box-shadow: inset 0 0 0 1.5px #b9d7ef; }
.button-ghost:hover { background: #eaf3fb; }
.button-light { background: #fff; color: var(--navy); }
.button-light:hover { background: #eaf3fb; }
.button-danger { background: var(--danger); }
.button-danger:hover { background: #a02f23; }
.text-link { font-weight: 600; text-decoration: none; }
.text-link:hover { text-decoration: underline; }
:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }

/* Hero */
.hero { background: radial-gradient(1000px 500px at 85% -10%, #d9f2fa 0%, transparent 60%), linear-gradient(180deg, #fff 0%, var(--bg) 100%); padding: clamp(40px, 8vw, 96px) 0; }
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: center; }
.eyebrow { text-transform: uppercase; letter-spacing: .12em; font-size: .78rem; font-weight: 700; color: var(--tertiary); margin-bottom: .8em; }
.lead { font-size: 1.15rem; color: var(--muted); max-width: 60ch; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 1.6rem; }

.mock { background: var(--surface); border: 1px solid var(--border); border-radius: 16px; box-shadow: var(--shadow); padding: 14px 16px 10px; }
.mock-bar { display: flex; align-items: center; gap: 6px; padding-bottom: 12px; }
.mock-bar span { width: 10px; height: 10px; border-radius: 50%; background: #d5dde6; }
.mock-bar em { margin-left: 10px; font-style: normal; font-weight: 700; color: var(--navy); }
.mock-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.mock-card { background: var(--bg); border: 1px solid var(--border); border-radius: 10px; padding: 10px 12px; }
.mock-card small { display: block; color: var(--muted); font-size: .72rem; font-weight: 600; }
.mock-card strong { display: block; font-size: 1.7rem; color: var(--navy); line-height: 1.2; }
.mock-card p { margin: 0; font-size: .74rem; color: var(--muted); }
.mock-alert strong { color: #d64545; }
.mock-wide { grid-column: 1 / -1; }
.mock-note { text-align: right; font-size: .7rem; color: var(--muted); margin: 8px 0 0; }

.strip { background: var(--navy); color: #fff; }
.strip-inner { display: flex; flex-wrap: wrap; gap: 8px 32px; justify-content: center; padding: 14px 0; font-weight: 600; font-size: .95rem; }
.strip-inner span::before { content: "✓"; color: var(--secondary); margin-right: 8px; }

/* Abschnitte */
.section { padding: clamp(40px, 6vw, 80px) 0; }
.section-alt { background: #eef4fa; }
.section-lead { color: var(--muted); font-size: 1.08rem; max-width: 70ch; margin-bottom: 2rem; }
.center .section-lead { margin-inline: auto; }
.page-head { background: linear-gradient(180deg, #fff, var(--bg)); padding: clamp(32px, 5vw, 64px) 0 8px; border-bottom: 1px solid var(--border); }
.page-head .lead { margin-bottom: 1.5rem; }
.head-row { display: flex; justify-content: space-between; align-items: end; gap: 16px; flex-wrap: wrap; }

.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 20px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow); }
.card p { color: var(--muted); margin: 0; }
.icon { color: var(--primary); background: #eaf3fb; border-radius: 12px; padding: 10px; width: 46px; height: 46px; margin-bottom: 12px; }

.steps { list-style: none; margin: 2rem 0 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 20px; counter-reset: step; }
.steps li { position: relative; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px 20px 20px; counter-increment: step; }
.steps li::before {
    content: counter(step); position: absolute; top: -14px; left: 18px; width: 30px; height: 30px; border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--tertiary)); color: #fff; font-weight: 700; display: grid; place-items: center;
}
.steps strong { display: block; color: var(--navy); margin-bottom: 4px; }
.steps span { color: var(--muted); }

.split { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: start; }
.ticks { list-style: none; padding: 0; margin: 0; }
.ticks li { position: relative; padding: 6px 0 6px 28px; }
.ticks li::before { content: ""; position: absolute; left: 4px; top: 13px; width: 12px; height: 7px; border-left: 2.5px solid var(--tertiary); border-bottom: 2.5px solid var(--tertiary); transform: rotate(-45deg); }
.update-box { background: linear-gradient(160deg, #fff, #eaf7fb); border: 1px solid #cfe7f1; border-radius: var(--radius); padding: 26px; }
.badge { display: inline-block; background: var(--navy); color: #fff; font-size: .85rem; font-weight: 600; padding: 4px 12px; border-radius: 999px; margin: 0; }
.badge-inline { margin-left: 8px; font-size: .72rem; padding: 2px 8px; background: var(--tertiary); }

.chips { list-style: none; display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; padding: 0; margin: 0 0 1rem; }
.chips li { background: #fff; border: 1px dashed #9db6cc; color: var(--navy); border-radius: 999px; padding: 6px 16px; font-weight: 600; }

.cta { background: linear-gradient(135deg, var(--navy), #0b4d80); color: #fff; }
.cta-inner { text-align: center; padding: clamp(40px, 6vw, 72px) 0; }
.cta h2 { color: #fff; }
.cta p { color: #cfe3f3; max-width: 60ch; margin-inline: auto; }

/* Funktionsseite */
.feature-list { display: grid; gap: 20px; }
.feature { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px; scroll-margin-top: 84px; }
.feature-head { display: flex; align-items: center; gap: 14px; margin-bottom: 8px; }
.feature-head h2 { margin: 0; font-size: 1.4rem; }
.feature-head .icon { margin: 0; flex: none; }

/* Versionen */
.timeline { list-style: none; margin: 0; padding: 0 0 0 22px; border-left: 2px solid var(--border); }
.timeline li { position: relative; padding: 0 0 28px 20px; }
.timeline li::before { content: ""; position: absolute; left: -30px; top: 8px; width: 12px; height: 12px; border-radius: 50%; background: var(--tertiary); box-shadow: 0 0 0 4px var(--bg); }
.timeline-head { display: flex; flex-wrap: wrap; gap: 4px 16px; align-items: baseline; }
.timeline-head h2 { font-size: 1.25rem; margin: 0; }
.notes { white-space: pre-wrap; margin: 6px 0 0; }

.contact-card, .panel { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow); }
.prose h2 { font-size: 1.2rem; margin-top: 1.6em; }
.notice { background: #fff8e1; border: 1px solid #f0d98a; border-radius: 8px; padding: 10px 14px; }

/* Formulare und Admin */
.form { display: grid; gap: 8px; max-width: 640px; }
.form label { font-weight: 600; margin-top: 8px; }
.form input:not([type="checkbox"]), .form textarea {
    font: inherit; padding: 10px 12px; border: 1px solid #cbd5e1; border-radius: 8px; background: #fff; width: 100%;
}
.form input:focus, .form textarea:focus { outline: 2px solid var(--primary); border-color: transparent; }
.form button { justify-self: start; margin-top: 10px; }
.check { display: flex; align-items: center; gap: 8px; font-weight: 500 !important; }
.login-form { max-width: 420px; margin-inline: auto; }
.alert { padding: 12px 16px; border-radius: 8px; margin: 0 0 20px; border: 1px solid; }
.alert-ok { background: #e8f8f2; border-color: #a7dfc7; color: #0b5a3f; }
.alert-error { background: #fdecea; border-color: #f2b8b1; color: #8a2119; }
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
.table { width: 100%; border-collapse: collapse; }
.table th, .table td { text-align: left; padding: 12px 16px; border-bottom: 1px solid var(--border); vertical-align: top; }
.table th { font-size: .8rem; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); background: #f3f7fb; }
.table .detail-row td { background: #fbfdff; padding-top: 4px; }
.table .hash { font-size: .8rem; }
.table tbody tr:last-child td { border-bottom: 0; }
details summary { cursor: pointer; color: var(--primary-dark); font-weight: 600; padding: 4px 0; }
.delete-form { margin-top: 14px; padding-top: 14px; border-top: 1px dashed var(--border); }
.plain { list-style: none; padding: 0; margin: 0; }
.plain li { padding: 6px 0; }

/* Fußzeile */
.site-footer { background: #fff; border-top: 1px solid var(--border); padding: 32px 0 20px; }
.footer-inner { display: flex; flex-wrap: wrap; gap: 24px; justify-content: space-between; }
.brand-footer { font-size: 1.1rem; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 6px 20px; align-content: start; }
.footer-nav a { color: var(--muted); text-decoration: none; }
.footer-nav a:hover { color: var(--primary-dark); text-decoration: underline; }
.footer-copy { margin-top: 20px; font-size: .88rem; }

/* Schmale Bildschirme */
@media (max-width: 860px) {
    .hero-grid, .split { grid-template-columns: 1fr; gap: 32px; }
    .nav-burger { display: inline-flex; }
    .main-nav {
        display: none; position: absolute; left: 0; right: 0; top: 64px; flex-direction: column; align-items: stretch;
        background: #fff; border-bottom: 1px solid var(--border); padding: 12px 16px 16px; box-shadow: var(--shadow);
    }
    .main-nav a.button { margin: 8px 0 0; text-align: center; }
    .nav-toggle:checked ~ .main-nav { display: flex; }
}

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