:root {
      --bg: #f5f5f5;
      --card-bg: #ffffff;
      --text: #1a1a1a;
      --text-muted: #666;
      --border: #e0e0e0;
      --e5-color: #2563eb;
      --e10-color: #16a34a;
      --diesel-color: #7c3aed;
      --red: #dc2626;
      --green: #16a34a;
      --shadow: 0 2px 8px rgba(0,0,0,.08);
    }
    @media (prefers-color-scheme: dark) {
      :root:not([data-theme="light"]) {
        --bg: #111;
        --card-bg: #1e1e1e;
        --text: #f0f0f0;
        --text-muted: #999;
        --border: #333;
        --shadow: 0 2px 8px rgba(0,0,0,.4);
      }
    }
    :root[data-theme="dark"] {
      --bg: #111;
      --card-bg: #1e1e1e;
      --text: #f0f0f0;
      --text-muted: #999;
      --border: #333;
      --shadow: 0 2px 8px rgba(0,0,0,.4);
    }
    :root[data-theme="light"] {
      --bg: #f5f5f5;
      --card-bg: #ffffff;
      --text: #1a1a1a;
      --text-muted: #666;
      --border: #e0e0e0;
      --shadow: 0 2px 8px rgba(0,0,0,.08);
    }

    * { box-sizing: border-box; margin: 0; padding: 0; }
    body { background: var(--bg); color: var(--text); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }

    header {
      background: #1a1a2e;
      color: #fff;
      padding: 16px 24px;
      display: flex;
      align-items: center;
      gap: 14px;
    }
    .logo {
      background: #e11d48;
      color: #fff;
      font-weight: 800;
      font-size: 1rem;
      width: 38px; height: 38px;
      border-radius: 8px;
      display: flex; align-items: center; justify-content: center;
      flex-shrink: 0;
    }
    .header-text { flex: 1; min-width: 0; }
    header h1 { font-size: 1.1rem; font-weight: 600; }
    header .subtitle { font-size: 0.8rem; color: #aaa; margin-top: 1px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

    .theme-toggle {
      background: rgba(255,255,255,.1);
      border: 1px solid rgba(255,255,255,.2);
      border-radius: 8px;
      color: #fff;
      cursor: pointer;
      font-size: 1rem;
      width: 36px; height: 36px;
      display: flex; align-items: center; justify-content: center;
      flex-shrink: 0;
      transition: background .15s;
      text-decoration: none;
    }
    .theme-toggle:hover { background: rgba(255,255,255,.2); }

    .logout-form { margin: 0; }
    .logout-btn {
      background: rgba(255,255,255,.1);
      border: 1px solid rgba(255,255,255,.2);
      border-radius: 8px;
      color: #fff;
      cursor: pointer;
      font-size: 0.78rem;
      padding: 8px 12px;
      white-space: nowrap;
      transition: background .15s;
    }
    .logout-btn:hover { background: rgba(255,255,255,.2); }

    main { max-width: 900px; margin: 0 auto; padding: 24px 16px; }

    .compare-card {
      background: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: 14px;
      padding: 18px 20px;
      box-shadow: var(--shadow);
      margin-bottom: 28px;
      overflow-x: auto;
    }
    .compare-empty {
      text-align: center;
      font-size: 0.9rem;
      color: var(--text-muted);
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      font-size: 0.86rem;
    }
    .compare-table th, .compare-table td {
      padding: 8px 6px;
      text-align: right;
    }
    .compare-table th:first-child, .compare-table td:first-child {
      text-align: left;
    }
    .compare-table thead th {
      font-size: 0.72rem;
      font-weight: 700;
      letter-spacing: .04em;
      text-transform: uppercase;
      color: var(--text-muted);
      border-bottom: 1px solid var(--border);
    }
    .compare-table tbody td {
      font-variant-numeric: tabular-nums;
      border-bottom: 1px solid var(--border);
    }
    .compare-table tbody tr:last-child td { border-bottom: none; }
    .compare-table .row-label { color: var(--text-muted); font-weight: 600; }
    .compare-table .cheapest { color: var(--green); font-weight: 700; }
    .compare-table .compare-street,
    .compare-table .compare-place {
      font-size: 0.68rem;
      font-weight: 400;
      text-transform: none;
      letter-spacing: normal;
      color: var(--text-muted);
      margin-top: 2px;
    }

    .city-heading {
      font-size: 0.76rem;
      font-weight: 700;
      letter-spacing: .06em;
      text-transform: uppercase;
      color: var(--text-muted);
      margin-bottom: 14px;
    }
    .station-section { margin-bottom: 40px; }
    .station-heading-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 8px;
    }
    .station-heading {
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 4px;
    }
    .remove-station-btn {
      background: none;
      border: 1px solid var(--border);
      border-radius: 8px;
      color: var(--text-muted);
      cursor: pointer;
      font-size: 0.76rem;
      padding: 4px 10px;
      flex-shrink: 0;
      transition: background .15s;
    }
    .remove-station-btn:hover { background: var(--border); color: var(--red); }
    .station-address {
      font-size: 0.8rem;
      color: var(--text-muted);
      margin-bottom: 6px;
    }
    .stale-warning {
      font-size: 0.78rem;
      color: #b45309;
      margin-bottom: 14px;
    }
    .closed-badge {
      font-size: 0.78rem;
      color: var(--text-muted);
      margin-bottom: 14px;
    }

    .price-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 16px;
      margin-bottom: 20px;
    }
    .price-card {
      background: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: 14px;
      padding: 20px 24px;
      box-shadow: var(--shadow);
      display: flex;
      flex-direction: column;
      gap: 6px;
    }
    .price-card .label {
      font-size: 0.78rem;
      font-weight: 700;
      letter-spacing: .06em;
      text-transform: uppercase;
      color: var(--text-muted);
    }
    .price-display {
      display: flex;
      align-items: flex-start;
      line-height: 1;
    }
    .price-euro {
      font-size: 2.6rem;
      font-weight: 800;
      font-variant-numeric: tabular-nums;
      letter-spacing: -1px;
    }
    .price-cent {
      font-size: 1.3rem;
      font-weight: 700;
      margin-top: 5px;
      font-variant-numeric: tabular-nums;
    }
    .price-unit {
      font-size: 0.85rem;
      color: var(--text-muted);
      padding-left: 4px;
      align-self: flex-end;
      padding-bottom: 4px;
    }
    .trend { font-size: 0.82rem; margin-top: 2px; }
    .trend.up   { color: var(--red); }
    .trend.down { color: var(--green); }
    .trend.flat { color: var(--text-muted); }

    .badge-alert {
      font-size: 0.76rem;
      font-weight: 700;
      color: #b45309;
      background: rgba(180,83,9,.12);
      border-radius: 20px;
      padding: 2px 10px;
      align-self: flex-start;
      margin-top: 2px;
    }

    .e5-price     .price-euro { color: var(--e5-color); }
    .e10-price    .price-euro { color: var(--e10-color); }
    .diesel-price .price-euro { color: var(--diesel-color); }

    .stats-row { display: flex; gap: 8px; flex-wrap: wrap; }
    .stat-pill {
      font-size: 0.76rem;
      color: var(--text-muted);
      background: var(--bg);
      border-radius: 20px;
      padding: 3px 10px;
      border: 1px solid var(--border);
    }

    .section-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 12px;
      flex-wrap: wrap;
      gap: 8px;
    }
    .section-title { font-size: 0.9rem; font-weight: 600; color: var(--text-muted); }
    .range-tabs { display: flex; gap: 4px; }
    .range-tab {
      background: none;
      border: 1px solid var(--border);
      border-radius: 20px;
      padding: 4px 14px;
      font-size: 0.78rem;
      cursor: pointer;
      color: var(--text-muted);
      transition: all .15s;
    }
    .range-tab.active {
      background: #1a1a2e;
      border-color: #1a1a2e;
      color: #fff;
    }

    .chart-card {
      background: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: 14px;
      padding: 20px;
      box-shadow: var(--shadow);
    }
    .chart-wrap { position: relative; height: 240px; }

    .chart-details summary {
      cursor: pointer;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-muted);
      padding: 6px 0 12px;
      list-style: none;
    }
    .chart-details summary::-webkit-details-marker { display: none; }
    .chart-details summary::before {
      content: '▸';
      display: inline-block;
      margin-right: 6px;
      transition: transform .15s;
    }
    .chart-details[open] summary::before { transform: rotate(90deg); }

    .status-bar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 8px;
      margin-bottom: 20px;
    }
    .status-text { font-size: 0.78rem; color: var(--text-muted); }

    .alert-row {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-wrap: wrap;
      font-size: 0.82rem;
      color: var(--text-muted);
      margin-bottom: 20px;
    }
    .alert-fuel {
      display: flex;
      align-items: center;
      gap: 5px;
      font-size: 0.78rem;
    }
    .alert-row input[type="number"] {
      width: 74px;
      background: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: 8px;
      padding: 5px 8px;
      font-size: 0.82rem;
      color: var(--text);
    }
    .alert-save-status {
      font-size: 0.76rem;
      color: var(--green);
      opacity: 0;
      transition: opacity .3s;
    }
    .alert-save-status.visible { opacity: 1; }

    .footnote {
      font-size: 0.75rem;
      color: var(--text-muted);
      text-align: center;
      margin-top: 8px;
    }

    hr.divider {
      border: none;
      border-top: 1px solid var(--border);
      margin: 32px 0;
    }

    .finder-form {
      display: flex;
      gap: 8px;
      flex-wrap: wrap;
      margin-bottom: 14px;
    }
    .finder-form input[type="text"] {
      flex: 1;
      min-width: 160px;
      background: var(--bg);
      border: 1px solid var(--border);
      border-radius: 8px;
      padding: 8px 12px;
      font-size: 0.9rem;
      color: var(--text);
    }
    .finder-form select {
      background: var(--bg);
      border: 1px solid var(--border);
      border-radius: 8px;
      padding: 8px 10px;
      font-size: 0.9rem;
      color: var(--text);
    }
    .finder-form button {
      background: #1a1a2e;
      color: #fff;
      border: none;
      border-radius: 8px;
      padding: 8px 18px;
      font-size: 0.9rem;
      cursor: pointer;
    }
    .finder-form button:disabled { opacity: .6; cursor: default; }
    .finder-status-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 10px;
      margin-bottom: 10px;
    }
    .finder-status {
      font-size: 0.82rem;
      color: var(--text-muted);
    }
    .finder-status.error { color: var(--red); }
    .finder-toggle {
      background: none;
      border: 1px solid var(--border);
      border-radius: 8px;
      padding: 3px 10px;
      font-size: 0.76rem;
      color: var(--text-muted);
      cursor: pointer;
      flex-shrink: 0;
      transition: background .15s;
    }
    .finder-toggle:hover { background: var(--border); }
    .finder-table {
      width: 100%;
      border-collapse: collapse;
      font-size: 0.85rem;
    }
    .finder-table th, .finder-table td {
      padding: 8px 6px;
      text-align: right;
      border-bottom: 1px solid var(--border);
    }
    .finder-table th:first-child, .finder-table td:first-child,
    .finder-table th:nth-child(2), .finder-table td:nth-child(2) {
      text-align: left;
    }
    .finder-table thead th {
      font-size: 0.72rem;
      font-weight: 700;
      letter-spacing: .04em;
      text-transform: uppercase;
      color: var(--text-muted);
    }
    .finder-table tbody td { font-variant-numeric: tabular-nums; }
    .finder-table .station-name { font-weight: 600; }
    .finder-table .station-address { font-size: 0.76rem; color: var(--text-muted); font-weight: 400; }
    .finder-table .closed { color: var(--text-muted); font-style: italic; }
    .finder-table .cheapest { color: var(--green); font-weight: 700; }
    .finder-checkbox-cell { width: 34px; }
    .finder-checkbox-cell input { width: 17px; height: 17px; cursor: pointer; }

    .admin-table {
      width: 100%;
      border-collapse: collapse;
      font-size: 0.85rem;
    }
    .admin-table th, .admin-table td {
      padding: 8px 10px;
      text-align: left;
      vertical-align: top;
      border-bottom: 1px solid var(--border);
    }
    .admin-table thead th {
      font-size: 0.72rem;
      font-weight: 700;
      letter-spacing: .04em;
      text-transform: uppercase;
      color: var(--text-muted);
    }
    .admin-badge {
      display: inline-block;
      margin-left: 8px;
      padding: 1px 8px;
      border-radius: 999px;
      background: var(--e5-color);
      color: #fff;
      font-size: 0.68rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: .04em;
    }
    .admin-muted { color: var(--text-muted); }

    @media (max-width: 480px) {
      .price-euro { font-size: 2.1rem; }
      .price-cent { font-size: 1.05rem; }
      .chart-wrap { height: 200px; }
      .compare-card { flex-direction: column; }
    }

    .back-link {
      display: inline-block;
      font-size: 0.82rem;
      color: var(--text-muted);
      margin-bottom: 20px;
    }
    .back-link:hover { color: var(--text); }
    .faq-item {
      background: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: 14px;
      padding: 18px 20px;
      box-shadow: var(--shadow);
      margin-bottom: 16px;
    }
    .faq-item h2 {
      font-size: 0.98rem;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .faq-item p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.55;
    }
    .faq-item p + p { margin-top: 8px; }

    /* Auth-Seiten (Login, Registrierung, Passwort vergessen/zurücksetzen) */
    .auth-body {
      min-height: 100vh;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 16px;
    }
    .auth-card {
      background: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: 14px;
      box-shadow: var(--shadow);
      padding: 32px 28px;
      width: 100%;
      max-width: 360px;
    }
    .auth-card .logo-row { display: flex; align-items: center; gap: 10px; margin-bottom: 22px; }
    .auth-card .logo {
      background: #e11d48; color: #fff; font-weight: 800; font-size: 1rem;
      width: 36px; height: 36px; border-radius: 8px;
      display: flex; align-items: center; justify-content: center; flex-shrink: 0;
    }
    .auth-card .logo-row h1 { font-size: 1.1rem; font-weight: 600; }
    .auth-card label { display: block; font-size: 0.82rem; color: var(--text-muted); margin-bottom: 4px; margin-top: 14px; }
    .auth-card label:first-of-type { margin-top: 0; }
    .auth-card input[type="email"], .auth-card input[type="password"] {
      width: 100%;
      background: var(--bg);
      border: 1px solid var(--border);
      border-radius: 8px;
      padding: 10px 12px;
      font-size: 0.92rem;
      color: var(--text);
    }
    .auth-card .hint { font-size: 0.74rem; color: var(--text-muted); margin-top: 4px; }
    .auth-card p.hint { font-size: 0.84rem; margin-top: 0; margin-bottom: 18px; line-height: 1.4; }
    .auth-card button[type="submit"] {
      width: 100%;
      background: #1a1a2e;
      color: #fff;
      border: none;
      border-radius: 8px;
      padding: 11px;
      font-size: 0.92rem;
      cursor: pointer;
      margin-top: 20px;
    }
    .auth-card .error {
      background: rgba(220,38,38,.1);
      color: var(--red);
      border-radius: 8px;
      padding: 8px 12px;
      font-size: 0.82rem;
      margin-bottom: 14px;
    }
    .auth-card .success {
      background: rgba(22,163,74,.1);
      color: var(--green);
      border-radius: 8px;
      padding: 10px 12px;
      font-size: 0.84rem;
      line-height: 1.4;
    }
    .auth-card .switch-link { text-align: center; font-size: 0.82rem; color: var(--text-muted); margin-top: 18px; }
    .auth-card .switch-link a { color: var(--text); font-weight: 600; }