:root {
    --bg: #f5f6f8;
    --surface: #ffffff;
    --surface2: #f0f1f4;
    --border: #e0e2e8;
    --text: #1a1a2e;
    --text2: #6b7080;
    --accent: #2563eb;
    --accent2: #1d4ed8;
    --green: #16a34a;
    --orange: #d97706;
    --red: #dc2626;
    --radius: 8px;
    --mono: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
    min-height: 100vh;
}

.layout {
    display: grid;
    grid-template-columns: 220px 1fr;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    background: var(--surface);
    border-right: 1px solid var(--border);
    padding: 24px 0;
    position: sticky;
    top: 0;
    height: 100vh;
    box-shadow: 1px 0 4px rgba(0,0,0,0.04);
}

.sidebar .logo {
    padding: 0 20px 24px;
    font-size: 18px;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: -0.5px;
}

.sidebar .logo span { color: var(--text2); font-weight: 400; font-size: 13px; }

nav a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 20px;
    color: var(--text2);
    text-decoration: none;
    font-size: 14px;
    transition: all 0.15s;
}

nav a:hover { color: var(--text); background: var(--surface2); }
nav a.active { color: var(--accent); background: rgba(37,99,235,0.06); border-right: 2px solid var(--accent); }
nav a svg { width: 18px; height: 18px; flex-shrink: 0; }

/* Sidebar footer */
.sidebar-footer {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 16px 20px;
    border-top: 1px solid var(--border);
}

.datenstand {
    display: flex;
    flex-direction: column;
    gap: 2px;
    font-size: 10px;
    color: var(--text2);
    line-height: 1.4;
}

.datenstand strong {
    font-size: 11px;
    color: var(--text);
    margin-bottom: 4px;
}

/* Main */
main {
    padding: 32px 40px;
    max-width: 1400px;
    overflow-x: auto;
}

h1 { font-size: 24px; font-weight: 700; margin-bottom: 24px; letter-spacing: -0.5px; }
h2 { font-size: 18px; font-weight: 600; margin: 32px 0 16px; color: var(--text2); }
h3 { font-size: 15px; font-weight: 600; margin-bottom: 12px; }

/* Stat Grid */
.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
    margin-bottom: 32px;
}

.stat-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}

.stat-value {
    font-size: 28px;
    font-weight: 700;
    font-family: var(--mono);
    color: var(--accent);
}

.stat-label { font-size: 13px; color: var(--text2); margin-top: 4px; }

/* Tables */
.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

.data-table th {
    text-align: left;
    padding: 10px 12px;
    background: var(--surface);
    border-bottom: 2px solid var(--border);
    font-weight: 600;
    color: var(--text2);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    white-space: nowrap;
    position: sticky;
    top: 0;
}

.data-table td {
    padding: 8px 12px;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 300px;
}

.data-table tr:hover { background: var(--surface2); }
.data-table .r { text-align: right; font-family: var(--mono); font-size: 12px; }
.data-table .clickable { cursor: pointer; }
.data-table .clickable:hover { background: rgba(37,99,235,0.06); }
.data-table.compact td, .data-table.compact th { padding: 5px 8px; }

/* Cards */
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 16px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}

.detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

dl { display: grid; grid-template-columns: 120px 1fr; gap: 4px 12px; font-size: 13px; }
dt { color: var(--text2); }
dd { font-family: var(--mono); font-size: 12px; }

.building-card { margin-bottom: 12px; }
.building-meta {
    display: flex;
    gap: 16px;
    font-size: 12px;
    color: var(--text2);
    margin-bottom: 12px;
    flex-wrap: wrap;
}

/* Badges */
.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
    font-family: var(--mono);
    background: var(--surface2);
    color: var(--text2);
}

.badge-WO, .badge-WA { background: rgba(22,163,74,0.1); color: var(--green); }
.badge-BU, .badge-GE { background: rgba(37,99,235,0.1); color: var(--accent); }
.badge-GA, .badge-KE { background: rgba(217,119,6,0.1); color: var(--orange); }

/* Search */
.search-box { margin-bottom: 24px; }
.search-box input {
    width: 100%;
    max-width: 600px;
    padding: 12px 16px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    font-size: 15px;
    outline: none;
    transition: border-color 0.15s;
}

.search-box input:focus { border-color: var(--accent); }

/* Filters */
.filters {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
    flex-wrap: wrap;
    align-items: center;
}

.filters select, .filters input {
    padding: 8px 12px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    font-size: 13px;
    min-width: 180px;
}

.filters select:disabled { opacity: 0.5; }

.btn {
    padding: 8px 20px;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: var(--radius);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s;
}

.btn:hover { background: var(--accent2); }

/* Pagination */
.pagination {
    display: flex;
    gap: 4px;
    margin-top: 16px;
    justify-content: center;
}

.page-btn {
    padding: 6px 12px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 4px;
    color: var(--text2);
    font-size: 13px;
    cursor: pointer;
}

.page-btn:hover { background: var(--surface2); color: var(--text); }
.page-btn.current { background: var(--accent); color: #fff; border-color: var(--accent); }

/* Utility */
.loading { color: var(--text2); padding: 40px 0; text-align: center; }
.error { color: var(--red); padding: 20px; background: rgba(220,38,38,0.06); border-radius: var(--radius); }
.muted { color: var(--text2); font-size: 13px; }
.result-count { font-size: 13px; color: var(--text2); margin-bottom: 12px; }
.back { color: var(--text2); text-decoration: none; font-size: 13px; display: inline-block; margin-bottom: 12px; }
.back:hover { color: var(--accent); }

@media (max-width: 900px) {
    .layout { grid-template-columns: 1fr; }
    .sidebar { display: none; }
    main { padding: 16px; }
    .detail-grid { grid-template-columns: 1fr; }
}