:root {
    --bg: #f4f7fb;
    --surface: #ffffff;
    --surface-muted: #f8fafc;
    --text: #1f2937;
    --text-muted: #6b7280;
    --primary: #1f5fa8;
    --primary-strong: #184d88;
    --accent: #2b8a6d;
    --border: #dbe3ee;
    --success: #1f8a4c;
    --warning: #c27a14;
    --danger: #c83b37;
    --info: #2d79c7;
    --radius-sm: 10px;
    --radius-md: 14px;
    --radius-lg: 18px;
    --shadow-sm: 0 2px 8px rgba(24, 39, 75, 0.06);
    --shadow-md: 0 10px 28px rgba(24, 39, 75, 0.08);
    --space-1: 0.375rem;
    --space-2: 0.625rem;
    --space-3: 0.875rem;
    --space-4: 1.125rem;
    --space-5: 1.5rem;
    --space-6: 2rem;
    --container: 1160px;
    --trans-fast: 140ms ease;
    --trans-normal: 220ms ease;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
    font-family: "Inter", "Segoe UI", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.55;
    background: var(--bg);
    color: var(--text);
}

a { color: var(--primary); text-underline-offset: 2px; }
a:hover { color: var(--primary-strong); }
:focus-visible {
    outline: 3px solid color-mix(in srgb, var(--primary) 36%, white);
    outline-offset: 2px;
}

.container { max-width: var(--container); margin: 0 auto; padding: 0 var(--space-4); }
.app-main { padding-top: var(--space-6); padding-bottom: 3.5rem; }
.app-main > * + * { margin-top: var(--space-4); }

.site-header {
    position: sticky;
    top: 0;
    z-index: 25;
    background: rgba(255, 255, 255, 0.95);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(8px);
}
.site-header-inner {
    min-height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
}
.brand {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text);
    text-decoration: none;
}
.brand-dot {
    width: 12px;
    height: 12px;
    border-radius: 999px;
    background: linear-gradient(140deg, var(--primary), var(--accent));
}

.menu-toggle {
    display: none;
    width: auto;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text);
    border-radius: var(--radius-sm);
    padding: 0.55rem 0.85rem;
}
.main-nav {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    flex-wrap: wrap;
}
.main-nav a {
    text-decoration: none;
    color: var(--text);
    font-weight: 600;
    font-size: 0.94rem;
    padding: 0.5rem 0.7rem;
    border-radius: 9px;
    transition: background var(--trans-fast), color var(--trans-fast);
}
.main-nav a:hover,
.main-nav a[aria-current="page"] {
    background: var(--surface-muted);
    color: var(--primary-strong);
}
.inline-form { display: inline-flex; margin: 0; }
.inline-form button {
    width: auto;
    background: #f4f6fa;
    color: var(--text);
    border: 1px solid var(--border);
}
.inline-form button:hover { background: #e9eef6; }

.site-footer {
    border-top: 1px solid var(--border);
    background: var(--surface);
    color: var(--text-muted);
}
.site-footer-inner {
    min-height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
    flex-wrap: wrap;
    font-size: 0.93rem;
}

h1, h2, h3 { line-height: 1.22; letter-spacing: -0.01em; margin-top: 0; }
h1 { font-size: clamp(1.6rem, 2vw, 2.1rem); margin-bottom: var(--space-3); }
h2 { font-size: clamp(1.18rem, 1.45vw, 1.45rem); margin-bottom: var(--space-2); }
h3 { font-size: 1.02rem; margin-bottom: var(--space-2); }
p { margin-top: 0; color: var(--text); }

.hero, .card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}
.hero { padding: clamp(1.2rem, 2vw, 2rem); margin-bottom: var(--space-4); }
.hero-muted { background: linear-gradient(180deg, #ffffff 0%, #f8fbff 100%); }
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: var(--space-4); margin-bottom: var(--space-4); }
.card {
    padding: clamp(1rem, 1.6vw, 1.35rem);
    transition: transform var(--trans-fast), box-shadow var(--trans-fast);
}
.card:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); }
.card p:last-child { margin-bottom: 0; }

.card-link {
    color: inherit;
    text-decoration: none;
    display: block;
}
.card-link .btn { margin-top: var(--space-3); }

.meta-row {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-bottom: var(--space-3);
}

label { display: block; margin-bottom: var(--space-3); font-weight: 600; color: var(--text); }
.hint { font-weight: 400; color: var(--text-muted); display: block; margin-top: 0.25rem; font-size: 0.92rem; }
input, textarea, select, button {
    width: 100%;
    margin-top: 0.4rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0.67rem 0.72rem;
    font: inherit;
    color: var(--text);
    background: #fff;
}
input[type="checkbox"],
input[type="radio"] {
    width: auto;
    margin-top: 0;
}
input::placeholder, textarea::placeholder { color: #9aa4b2; }
textarea { min-height: 96px; resize: vertical; }

button, .btn {
    width: auto;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    padding: 0.64rem 0.95rem;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    background: var(--primary);
    color: #fff;
    text-decoration: none;
    font-weight: 600;
    cursor: pointer;
    transition: transform var(--trans-fast), background var(--trans-fast), border-color var(--trans-fast);
    min-height: 44px;
}
button:hover, .btn:hover { background: var(--primary-strong); transform: translateY(-1px); }
button:disabled { opacity: 0.65; cursor: not-allowed; transform: none; }
.btn-secondary { background: var(--surface-muted); border-color: var(--border); color: var(--text); }
.btn-secondary:hover { background: #e9eff8; color: var(--text); }
.btn-success { background: var(--accent); }
.btn-danger { background: var(--danger); }

.alert, .error {
    border-radius: var(--radius-sm);
    padding: var(--space-3) var(--space-4);
    border: 1px solid;
    margin-bottom: var(--space-4);
}
.error, .alert-danger { background: #fff4f4; border-color: #f2c4c4; color: #8d2525; }
.alert-success { background: #f2fcf6; border-color: #c2efd0; color: #166a39; }
.alert-info { background: #f2f8ff; border-color: #caddf7; color: #1f5696; }
.alert-warning { background: #fff8ec; border-color: #f1d39b; color: #875311; }

.split-header { display: flex; justify-content: space-between; align-items: center; gap: var(--space-3); flex-wrap: wrap; }
.success-card {
    border-color: #c6e7d3;
    background: #f5fcf8;
}
.important-box {
    border-color: #f1d39b;
    background: #fff8ec;
}
.form-section {
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: var(--space-3);
    margin: 0 0 var(--space-3);
    background: var(--surface-muted);
}
.form-section legend {
    font-weight: 700;
    color: var(--text);
    padding: 0 0.3rem;
}
.cluster-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}
.cluster-actions form {
    margin: 0;
}
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.62rem;
    border-radius: 999px;
    background: #eaf0f8;
    color: #36506f;
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}
.badge-status-idee, .badge-status-ungeklaert { background: #edf0f5; color: #526074; }
.badge-status-pruefung, .badge-status-prüfung, .badge-status-teilweise { background: #fff4dd; color: #8a580f; }
.badge-status-mitwirkende-gesucht, .badge-status-ressourcenprüfung, .badge-status-ressourcenpruefung { background: #e9f5ff; color: #2f5a86; }
.badge-status-prototyp, .badge-status-aktiv, .badge-status-tragfaehig { background: #e8f8f0; color: #1f6b49; }
.badge-status-abgeschlossen, .badge-status-bestaetigt, .badge-status-bestätigt { background: #e5f4ec; color: #1e6745; }
.badge-status-abgebrochen, .badge-status-verworfen, .badge-status-kritisch { background: #fdecec; color: #9a3431; }
.badge-status-vorgeschlagen { background: #eef3fb; color: #446188; }
.badge-status-uebernommen, .badge-status-übernommen { background: #ecf7ee; color: #236142; }
.badge-status-von-ki-vorgeschlagen { background: #eef3fb; color: #446188; }
.badge-status-von-menschen-bestaetigt { background: #e5f4ec; color: #1e6745; }
.badge-status-vom-nutzer-angegeben { background: #f4f7fb; color: #4b5b74; }
.badge-status-real-vorhanden { background: #e1f4ea; color: #145d3c; }

.wizard-progress {
    margin-bottom: var(--space-4);
    display: grid;
    gap: var(--space-2);
}
.progress-track {
    width: 100%;
    height: 10px;
    border-radius: 999px;
    background: #e7edf7;
    overflow: hidden;
}
.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    width: 0;
    transition: width var(--trans-normal);
}
.wizard-step { display: none; }
.wizard-step.active { display: block; }
.wizard-actions {
    margin-top: var(--space-4);
    padding-top: var(--space-3);
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    gap: var(--space-2);
    flex-wrap: wrap;
}

.traffic { list-style: none; padding: 0; margin: 0; display: grid; gap: var(--space-2); }
.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    display: inline-block;
    margin-right: 0.45rem;
    border: 1px solid rgba(0, 0, 0, 0.2);
}
.grün { background: #2bb24c; }
.gelb { background: #f2c936; }
.rot { background: #df3a31; }
.grau { background: #b6bcc1; }

.status-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    gap: var(--space-3);
}

@media (max-width: 960px) {
    .menu-toggle { display: inline-flex; }
    .main-nav {
        display: none;
        width: 100%;
        padding-bottom: var(--space-3);
        border-top: 1px solid var(--border);
        margin-top: var(--space-2);
        padding-top: var(--space-2);
    }
    .main-nav.is-open { display: grid; gap: 0.2rem; }
    .main-nav a, .main-nav .inline-form { width: 100%; }
    .main-nav .inline-form button { width: 100%; justify-content: flex-start; }
}

@media (max-width: 640px) {
    .container { padding: 0 var(--space-3); }
    .app-main { padding-top: var(--space-5); }
    .cards { grid-template-columns: 1fr; }
    button, .btn { width: 100%; }
    .cluster-actions form { width: 100%; }
    .wizard-actions button { flex: 1 1 100%; }
}