:root {
    --blue: #fa0113;      /* BTG-Rot, aus dem Logo */
    --blue-dark: #c40010;
    --bg: #ffffff;
    --card: #ffffff;
    --text: #000000;
    --muted: #6b7280;
    --green: #16a34a;
    --red: #dc2626;
    --border: #e5e7eb;
    --header-bg: #000000;  /* passend zum schwarzen Logo-Hintergrund */
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
}

.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--header-bg);
    color: #fff;
    padding: 0.5rem 1rem;
    position: sticky;
    top: 0;
    z-index: 10;
}

.app-logo {
    white-space: nowrap;
    display: flex;
    align-items: center;
}

.app-logo img {
    height: 32px;
    width: auto;
    display: block;
}

.menu-toggle {
    background: none;
    border: none;
    color: #fff;
    font-size: 1.5rem;
    cursor: pointer;
    display: block;
}

.app-nav {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--blue-dark);
}

.app-nav.open {
    display: flex;
}

.app-nav a {
    color: #fff;
    text-decoration: none;
    padding: 0.85rem 1.25rem;
    border-bottom: 1px solid rgba(255,255,255,0.15);
}

.app-nav a:hover {
    background: rgba(255,255,255,0.1);
}

.app-content {
    max-width: 720px;
    margin: 0 auto;
    padding: 1.25rem 1rem 3rem;
}

h1 { font-size: 1.4rem; margin-top: 0; }
h2 { font-size: 1.1rem; margin-top: 2rem; }

.form {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    background: var(--card);
    padding: 1rem;
    border-radius: 10px;
    border: 1px solid var(--border);
    box-shadow: 0 1px 3px rgba(0,0,0,0.06);
    margin-bottom: 1rem;
}

.form label {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    font-size: 0.9rem;
    color: var(--muted);
}

input[type=text], input[type=email], input[type=password], select {
    padding: 0.6rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 1rem;
}

button {
    background: var(--blue);
    color: #fff;
    border: none;
    padding: 0.65rem 1rem;
    border-radius: 6px;
    font-size: 0.95rem;
    cursor: pointer;
}

button:hover { background: var(--blue-dark); }

.btn-ok { background: var(--green); }
.btn-no { background: var(--red); }

.card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.06);
    margin-bottom: 1rem;
}

.ergebnis {
    text-align: center;
}

.ergebnis-plz {
    color: var(--muted);
    font-size: 1rem;
    margin: 0 0 .25rem;
}

.ergebnis-kuerzel {
    font-size: 3rem;
    font-weight: 800;
    color: var(--blue);
    margin: 0;
    line-height: 1.1;
    letter-spacing: 1px;
}

.ergebnis-bezeichnung {
    font-size: 1rem;
    color: var(--text);
    margin: .25rem 0 0;
}

.hint { color: var(--muted); font-size: 0.85rem; }

.error {
    background: #fee2e2;
    color: #991b1b;
    padding: 0.7rem 1rem;
    border-radius: 6px;
}

.success {
    background: #dcfce7;
    color: #166534;
    padding: 0.7rem 1rem;
    border-radius: 6px;
}

.table {
    width: 100%;
    border-collapse: collapse;
    background: var(--card);
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid var(--border);
    font-size: 0.9rem;
}

.table th, .table td {
    padding: 0.6rem;
    border-bottom: 1px solid var(--border);
    text-align: left;
}

.inline-form {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
    align-items: center;
    margin-bottom: 0.4rem;
}

.payload {
    background: #f3f4f6;
    padding: 0.6rem;
    border-radius: 6px;
    font-size: 0.8rem;
    overflow-x: auto;
}

.stats {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-bottom: 1.5rem;
}

.stat-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 0.9rem 1.2rem;
    flex: 1;
    min-width: 110px;
    text-align: center;
}

.stat-card span {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--blue);
}

/* ab Tablet-Breite: Menü immer sichtbar, Toggle ausblenden */
@media (min-width: 720px) {
    .menu-toggle { display: none; }
    .app-nav {
        display: flex !important;
        flex-direction: row;
        position: static;
        background: none;
    }
    .app-nav a {
        border-bottom: none;
        padding: 0.4rem 0.9rem;
    }
    .app-header { justify-content: space-between; }
}