:root {
    --bg: #f5f6f8;
    --card: #ffffff;
    --border: #e0e3e8;
    --text: #23272f;
    --muted: #6b7280;
    --primary: #2563eb;
    --success: #16a34a;
    --error: #dc2626;
}

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

.layout { display: flex; min-height: 100vh; }

.sidebar {
    width: 220px;
    flex-shrink: 0;
    background: #1f2430;
    color: #cfd3dc;
    display: flex;
    flex-direction: column;
    padding: 16px 0;
}
.sidebar a {
    color: #cfd3dc;
    text-decoration: none;
    padding: 10px 20px;
}
.sidebar a:hover { background: #2b3140; color: #fff; }
.sidebar-brand { font-weight: 700; font-size: 1.2rem; padding: 10px 20px 20px; color: #fff; }
.sidebar-spacer { flex: 1; }
.sidebar-user { padding: 10px 20px; font-size: 0.85rem; color: #8b91a0; }

.content { flex: 1; padding: 24px; max-width: 1000px; }

h1 { margin-top: 0; }

.stat-row { display: flex; gap: 16px; margin-bottom: 24px; flex-wrap: wrap; }
.stat-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 16px 24px;
    min-width: 140px;
}
.stat-value { font-size: 1.8rem; font-weight: 700; }
.stat-label { color: var(--muted); font-size: 0.9rem; }

.data-table { width: 100%; border-collapse: collapse; background: var(--card); border-radius: 8px; overflow: hidden; }
.data-table th, .data-table td { padding: 10px 12px; border-bottom: 1px solid var(--border); text-align: left; }
.data-table th { background: #f0f1f4; font-size: 0.85rem; color: var(--muted); }

.row-actions { display: flex; gap: 10px; align-items: center; white-space: nowrap; }
.inline-form { display: inline; }
.link-danger {
    background: none; border: none; padding: 0; cursor: pointer;
    color: var(--error); text-decoration: underline; font-size: inherit;
}

.search-bar { display: flex; gap: 8px; margin-bottom: 16px; align-items: center; }
.search-bar input[type=text] { padding: 8px; border: 1px solid var(--border); border-radius: 6px; flex: 1; max-width: 300px; }

label { display: block; margin-bottom: 12px; font-size: 0.9rem; color: var(--muted); }
label.inline { display: inline-block; margin-bottom: 20px; }
input[type=text], input[type=email], input[type=password], textarea, select {
    display: block;
    width: 100%;
    margin-top: 4px;
    padding: 8px 10px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 1rem;
    font-family: inherit;
    color: var(--text);
}

.field-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 4px 16px; }

.street-row { display: grid; grid-template-columns: 1fr 140px; gap: 4px 16px; }

.tabs { margin: 16px 0; border: 1px solid var(--border); border-radius: 8px; background: var(--card); }
.tab-buttons { display: flex; flex-wrap: wrap; border-bottom: 1px solid var(--border); }
.tab-btn {
    background: none; border: none; padding: 12px 16px; cursor: pointer;
    font-size: 0.95rem; color: var(--muted); border-bottom: 2px solid transparent;
}
.tab-btn.active { color: var(--primary); border-bottom-color: var(--primary); font-weight: 600; }
.tab-panel { padding: 16px; }
.tab-panel.hidden { display: none; }

.form-actions { margin-top: 16px; display: flex; gap: 10px; }

.duplicate-warning {
    grid-column: 1 / -1;
    background: #fff7e6;
    border: 1px solid #f0c36d;
    color: #7a5b00;
    border-radius: 6px;
    padding: 8px 12px;
    font-size: 0.85rem;
    margin: -4px 0 8px;
}
.duplicate-warning.hidden { display: none; }
.duplicate-warning ul { margin: 4px 0 0; padding-left: 18px; }
.duplicate-warning a { font-weight: 600; }

button, .btn {
    display: inline-block;
    background: var(--primary);
    color: #fff;
    border: none;
    padding: 10px 18px;
    border-radius: 6px;
    cursor: pointer;
    text-decoration: none;
    font-size: 0.95rem;
}
button:hover, .btn:hover { opacity: 0.9; }
a.btn { background: #e5e7eb; color: var(--text); }

.alert { padding: 10px 14px; border-radius: 6px; margin-bottom: 16px; }
.alert-success { background: #dcfce7; color: #166534; }
.alert-error { background: #fee2e2; color: #991b1b; }

.muted { color: var(--muted); }

.login-page { display: flex; align-items: center; justify-content: center; height: 100vh; background: var(--bg); }
.login-box { background: var(--card); padding: 32px; border-radius: 10px; width: 320px; border: 1px solid var(--border); }
.login-box h1 { margin-top: 0; text-align: center; }
.login-box button { width: 100%; margin-top: 8px; }

/* Mobil */
@media (max-width: 700px) {
    .layout { flex-direction: column; }
    .sidebar { width: 100%; flex-direction: row; flex-wrap: wrap; padding: 8px; }
    .sidebar-brand { padding: 8px 12px; }
    .sidebar-spacer { display: none; }
    .content { padding: 14px; }
    .field-grid { grid-template-columns: 1fr; }
    .street-row { grid-template-columns: 1fr; }
}