:root {
    color-scheme: dark;
    --bg: #0f1216;
    --panel: #171b21;
    --panel-2: #1e232b;
    --border: #2a313c;
    --text: #e6e9ee;
    --text-dim: #8b95a3;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --ok: #22c55e;
    --warn: #f59e0b;
    --danger: #ef4444;
}

* { box-sizing: border-box; }

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

a { color: var(--accent); }

/* ---- login ---- */
.login-wrap {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 32px;
    width: 100%;
    max-width: 420px;
}

.login-logo {
    display: block;
    width: 220px;
    height: 220px;
    margin: 0 auto 8px;
    object-fit: contain;
}

.login-card h1 {
    font-size: 20px;
    margin: 0 0 4px;
    text-align: center;
}

.login-card p.subtitle {
    color: var(--text-dim);
    margin: 0 0 24px;
    font-size: 13px;
    text-align: center;
}

.topbar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.topbar-brand img {
    width: 28px;
    height: 28px;
    object-fit: contain;
}

/* ---- sidebar layout ---- */

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

.sidebar {
    width: 240px;
    flex-shrink: 0;
    background: var(--panel);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 0;
    height: 100vh;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 18px 20px;
    border-bottom: 1px solid var(--border);
}

.sidebar-brand img {
    width: 30px;
    height: 30px;
    object-fit: contain;
}

.sidebar-brand span {
    font-weight: 600;
    font-size: 15px;
}

.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: 12px;
}

.sidebar-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 10px 12px;
    border-radius: 8px;
    color: var(--text-dim);
    text-decoration: none;
    font-size: 14px;
    background: transparent;
    border: none;
    text-align: left;
    cursor: pointer;
    margin-bottom: 2px;
}

.sidebar-item:hover {
    background: var(--panel-2);
    color: var(--text);
}

.sidebar-item.active {
    background: rgba(59, 130, 246, 0.15);
    color: var(--accent);
    font-weight: 500;
}

.sidebar-group .chevron {
    transition: transform 0.15s ease;
}

.sidebar-group.open .chevron {
    transform: rotate(90deg);
}

.sidebar-submenu {
    max-height: 0;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    padding-left: 12px;
    transition: max-height 0.15s ease;
}

.sidebar-group.open .sidebar-submenu {
    max-height: 200px;
}

.sidebar-sublink {
    padding: 8px 12px;
    border-radius: 8px;
    color: var(--text-dim);
    text-decoration: none;
    font-size: 13px;
}

.sidebar-sublink:hover {
    background: var(--panel-2);
    color: var(--text);
}

.sidebar-sublink.active {
    color: var(--accent);
    font-weight: 500;
}

.sidebar-footer {
    padding: 14px;
    border-top: 1px solid var(--border);
}

.main-content {
    flex: 1;
    min-width: 0;
    padding: 24px;
    max-width: 1200px;
}

.page-header {
    margin-bottom: 20px;
}

.page-header h1 {
    font-size: 18px;
    margin: 0;
}

.field {
    margin-bottom: 16px;
}

.field label {
    display: block;
    font-size: 13px;
    color: var(--text-dim);
    margin-bottom: 6px;
}

input, select, textarea {
    width: 100%;
    background: var(--panel-2);
    border: 1px solid var(--border);
    color: var(--text);
    border-radius: 8px;
    padding: 10px 12px;
    font-size: 14px;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--accent);
}

button, .btn {
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: 8px;
    padding: 10px 16px;
    font-size: 14px;
    cursor: pointer;
    font-weight: 500;
}

button:hover, .btn:hover { background: var(--accent-hover); }

button.secondary, .btn.secondary {
    background: var(--panel-2);
    border: 1px solid var(--border);
    color: var(--text);
}
button.secondary:hover { background: var(--border); }

button.danger { background: var(--danger); }
button.danger:hover { background: #dc2626; }

button:disabled { opacity: 0.5; cursor: not-allowed; }

.error-msg {
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid var(--danger);
    color: #fca5a5;
    padding: 10px 12px;
    border-radius: 8px;
    font-size: 13px;
    margin-bottom: 16px;
    display: none;
}

.error-msg.show { display: block; }

/* ---- layout general ---- */
.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 24px;
    border-bottom: 1px solid var(--border);
    background: var(--panel);
}

.topbar h1 {
    font-size: 16px;
    margin: 0;
}

.topbar .user-info {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 13px;
    color: var(--text-dim);
}

main {
    padding: 24px;
    max-width: 1200px;
    margin: 0 auto;
}

.tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border);
}

.tab-btn {
    background: transparent;
    border: none;
    color: var(--text-dim);
    padding: 10px 16px;
    border-radius: 0;
    border-bottom: 2px solid transparent;
}

.tab-btn.active {
    color: var(--text);
    border-bottom-color: var(--accent);
}

.tab-panel { display: none; }
.tab-panel.active { display: block; }

.panel {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 20px;
}

.panel h2 {
    font-size: 15px;
    margin: 0 0 16px;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

th, td {
    text-align: left;
    padding: 10px 12px;
    border-bottom: 1px solid var(--border);
}

th {
    color: var(--text-dim);
    font-weight: 500;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

tr:last-child td { border-bottom: none; }

.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 500;
}

.badge.ok { background: rgba(34,197,94,0.15); color: var(--ok); }
.badge.warn { background: rgba(245,158,11,0.15); color: var(--warn); }
.badge.danger { background: rgba(239,68,68,0.15); color: var(--danger); }
.badge.muted { background: var(--panel-2); color: var(--text-dim); }

.actions-cell { display: flex; gap: 6px; flex-wrap: wrap; }
.actions-cell button { padding: 5px 10px; font-size: 12px; }

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
}

.form-grid .full { grid-column: 1 / -1; }

.empty-state {
    color: var(--text-dim);
    text-align: center;
    padding: 30px;
    font-size: 13px;
}

.toast {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: var(--panel-2);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 12px 16px;
    font-size: 13px;
    max-width: 360px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.4);
    z-index: 1000;
}

.toast.ok { border-color: var(--ok); }
.toast.error { border-color: var(--danger); }

.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 900;
    padding: 20px;
}

.modal-overlay.hidden { display: none; }

.modal {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    max-width: 640px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal h2 { margin-top: 0; }

.modal-close {
    float: right;
    background: transparent;
    color: var(--text-dim);
    border: none;
    font-size: 20px;
    cursor: pointer;
    padding: 0;
}

pre.status-block {
    background: var(--panel-2);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 12px;
    font-size: 12px;
    white-space: pre-wrap;
    word-break: break-word;
    max-height: 300px;
    overflow-y: auto;
}

.refresh-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.text-dim { color: var(--text-dim); font-size: 12px; }