:root {
    --bg: #0b0f1a;
    --bg-elev: #121826;
    --bg-elev-2: #1a2235;
    --border: #1f2940;
    --border-strong: #2a3551;
    --text: #e6edf3;
    --text-dim: #8b94a8;
    --accent: #f59e0b;
    --accent-soft: rgba(245, 158, 11, 0.15);
    --nav: #5b7bff;
    --nav-soft: rgba(91, 123, 255, 0.16);
    --nav-strong: rgba(91, 123, 255, 0.85);
    --brand: #c9d2ff;
    --danger: #f87171;
    --danger-soft: rgba(248, 113, 113, 0.12);
    --ok: #34d399;
    --warn: #fbbf24;
    --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
    --radius: 10px;
    --sidebar-w: 220px;
    --topbar-h: 56px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--text); }
body {
    font: 14px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    min-height: 100vh;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code, .mono { font-family: var(--mono); }

/* ---------- App shell (sidebar + topbar + main) ---------- */

body.has-shell {
    display: grid;
    grid-template-columns: var(--sidebar-w) 1fr;
    min-height: 100vh;
}

.sidebar {
    background: linear-gradient(180deg, #0e1424 0%, #0a1020 100%);
    border-right: 1px solid var(--border);
    padding: 18px 12px 28px;
    position: sticky; top: 0;
    height: 100vh; overflow-y: auto;
}
.sidebar-brand {
    color: var(--brand);
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 0.6px;
    text-align: center;
    padding: 6px 8px 22px;
}

.side-nav { display: flex; flex-direction: column; gap: 2px; }
.nav-item {
    display: flex; align-items: center; gap: 10px;
    padding: 10px 12px;
    color: var(--text);
    border-radius: 8px;
    font-size: 14px;
    line-height: 1;
    transition: background 0.15s, color 0.15s;
}
.nav-item:hover { background: rgba(255,255,255,0.04); color: var(--text); text-decoration: none; }
.nav-item.active {
    background: var(--nav);
    color: #fff;
    box-shadow: 0 6px 18px -8px var(--nav-strong);
}
.nav-item.active:hover { background: var(--nav); }
.nav-item .ico { width: 18px; height: 18px; fill: currentColor; flex-shrink: 0; opacity: 0.85; }
.nav-item.active .ico { opacity: 1; }

.nav-group { margin-top: 6px; }
.nav-group-head {
    display: flex; align-items: center; gap: 10px;
    width: 100%; padding: 10px 12px;
    background: transparent; border: none;
    color: var(--text-dim);
    font: inherit; font-size: 14px; line-height: 1;
    border-radius: 8px;
    cursor: pointer;
}
.nav-group-head:hover { background: rgba(255,255,255,0.03); color: var(--text); }
.nav-group-head .ico { width: 18px; height: 18px; fill: currentColor; opacity: 0.7; }
.nav-group-head span { flex: 1; text-align: left; }
.nav-group-head .caret {
    width: 14px; height: 14px; fill: currentColor;
    transition: transform 0.18s; opacity: 0.6;
}
.nav-group.open .nav-group-head .caret { transform: rotate(180deg); }

.nav-sub {
    display: none;
    flex-direction: column;
    gap: 2px;
    padding: 2px 0 4px 12px;
    margin-left: 14px;
    border-left: 1px solid var(--border);
}
.nav-group.open .nav-sub { display: flex; }
.nav-item.sub { padding: 8px 10px; font-size: 13.5px; color: var(--text-dim); }
.nav-item.sub:hover { color: var(--text); }
.nav-item.sub.active {
    background: var(--nav-soft);
    color: var(--nav);
    box-shadow: none;
}

/* disabled / placeholder nav rows (gray-out, non-interactive) */
.nav-item.disabled {
    color: #4a546b;
    cursor: not-allowed;
    background: transparent;
}
.nav-item.disabled .ico { opacity: 0.45; }
.nav-item.disabled:hover { background: transparent; color: #4a546b; }
.nav-item.sub.disabled { color: #4a546b; }
.nav-item.sub.disabled:hover { color: #4a546b; background: transparent; }

/* ---------- Shell main area ---------- */

.shell { min-width: 0; display: flex; flex-direction: column; }
.topbar {
    display: flex; align-items: center; justify-content: space-between;
    gap: 16px;
    height: var(--topbar-h);
    padding: 0 24px;
    background: var(--bg-elev);
    border-bottom: 1px solid var(--border);
    position: sticky; top: 0; z-index: 10;
}
.topbar-left, .topbar-right { display: flex; align-items: center; gap: 12px; }
.topbar-host { color: var(--text-dim); font-family: var(--mono); font-size: 12.5px; }
.topbar-user { color: var(--text-dim); font-size: 13px; }
.topbar-logout { color: var(--text-dim); font-size: 13px; }
.topbar-logout:hover { color: var(--danger); text-decoration: none; }

.container { max-width: 1280px; margin: 0 auto; padding: 24px; width: 100%; }
.container-bare { max-width: 1280px; margin: 0 auto; padding: 24px; }

.page-head { margin-bottom: 16px; }
.page-head h1 { margin: 0 0 4px 0; font-size: 20px; }
.muted { color: var(--text-dim); }

.card {
    background: var(--bg-elev);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px 20px;
    margin-bottom: 18px;
}
.card h2 { margin: 0 0 12px 0; font-size: 15px; color: var(--text-dim); font-weight: 600; }

.grid { display: grid; gap: 16px; }
.stat-grid { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }
.stat { display: block; }
.stat-label { color: var(--text-dim); font-size: 13px; }
.stat-value { font-size: 32px; font-weight: 700; margin-top: 4px; color: var(--accent); }

.form-grid {
    display: grid; gap: 12px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
}
.form-grid label { display: flex; flex-direction: column; gap: 4px; font-size: 12px; color: var(--text-dim); }
.form-grid .span-2 { grid-column: span 2; }
.form-actions { display: flex; gap: 10px; align-items: center; }

/* Single-row form: every label+input pair and every button lined up horizontally.
   flex-wrap is explicitly disabled so it stays as a single row even on narrow
   viewports (will horizontal-scroll if it has to). */
.form-row-inline {
    display: flex;
    flex-wrap: nowrap;
    gap: 10px;
    align-items: flex-end;
    width: 100%;
}
.form-row-inline label {
    display: flex; flex-direction: column;
    gap: 4px; font-size: 12px; color: var(--text-dim);
    min-width: 0;
}
.form-row-inline label.grow { flex: 1 1 0; }
.form-row-inline input { width: 100%; }
.form-row-inline > button { flex-shrink: 0; white-space: nowrap; }

input, select, button {
    font: inherit; color: var(--text);
    background: var(--bg-elev-2);
    border: 1px solid var(--border-strong);
    border-radius: 8px;
    padding: 8px 10px;
    outline: none;
}
input:focus, select:focus { border-color: var(--accent); }
button {
    background: var(--accent); color: #1a1206; border: none;
    cursor: pointer; font-weight: 600;
    padding: 8px 14px;
}
button:hover { filter: brightness(1.08); }
.btn-ghost {
    background: transparent; color: var(--text);
    border: 1px solid var(--border-strong);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }
.btn-primary {
    display: inline-block; padding: 8px 14px; border-radius: 8px;
    background: var(--accent); color: #1a1206; font-weight: 600;
}
.btn-primary:hover { text-decoration: none; filter: brightness(1.08); }
.btn-danger {
    background: var(--danger-soft); color: var(--danger);
    border: 1px solid rgba(248,113,113,0.4);
    padding: 5px 10px; font-weight: 600; cursor: pointer;
}
.btn-danger:hover { background: rgba(248,113,113,0.2); }

.filters {
    display: flex; gap: 10px; flex-wrap: wrap;
    margin-bottom: 14px; align-items: center;
}
.filters input { min-width: 220px; }

.table-wrap { overflow-x: auto; }
table.data {
    width: 100%; border-collapse: collapse;
    font-size: 13px;
}
table.data th, table.data td {
    padding: 8px 10px;
    border-bottom: 1px solid var(--border);
    text-align: left; vertical-align: top;
}
table.data thead th {
    color: var(--text-dim); font-weight: 600;
    background: var(--bg-elev-2);
    position: sticky; top: 0;
}
table.data tbody tr:hover { background: rgba(245,158,11,0.04); }
table.clickable-copy td[data-copy] { cursor: pointer; }
table.clickable-copy td[data-copy]:hover { color: var(--accent); }
table.clickable-copy .copy-row { cursor: pointer; color: var(--accent); font-weight: 600; }

.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 999px;
    font-size: 11px; font-weight: 700;
    background: var(--bg-elev-2);
    border: 1px solid var(--border-strong);
}
.badge.super { color: var(--accent); border-color: var(--accent); background: var(--accent-soft); }
.badge.user { color: var(--ok); border-color: rgba(52,211,153,0.4); background: rgba(52,211,153,0.12); }

form.inline { display: inline; }

.checklist { padding-left: 20px; }
.checklist li { margin: 6px 0; }

.alert {
    background: var(--danger-soft); color: var(--danger);
    border: 1px solid rgba(248,113,113,0.4);
    padding: 10px 12px; border-radius: 8px; margin-bottom: 12px;
}
.alert-strong {
    border-color: var(--accent); background: var(--accent-soft);
}
.alert-strong h2 { color: var(--accent); }
.copyable { cursor: pointer; }
.copyable:hover { color: var(--accent); }

.login-wrap {
    min-height: 70vh; display: grid; place-items: center;
}
.login {
    width: 360px;
}
.login h1 { margin: 0 0 4px 0; font-size: 20px; color: var(--brand); }
.login label { display: flex; flex-direction: column; gap: 4px; margin: 12px 0; font-size: 12px; color: var(--text-dim); }
.login button { width: 100%; margin-top: 8px; padding: 10px; }

#toast {
    position: fixed; left: 50%; bottom: 32px;
    transform: translateX(-50%);
    background: var(--bg-elev-2); color: var(--text);
    border: 1px solid var(--accent);
    padding: 8px 16px; border-radius: 999px;
    opacity: 0; transition: opacity 0.2s;
    pointer-events: none; z-index: 1000;
    font-size: 13px;
}
#toast.show { opacity: 1; }

/* ---------- Responsive: collapse sidebar under 900px ---------- */
@media (max-width: 900px) {
    body.has-shell { grid-template-columns: 64px 1fr; }
    :root { --sidebar-w: 64px; }
    .sidebar { padding: 12px 6px; }
    .sidebar-brand { font-size: 0; padding: 8px 0 18px; }
    .sidebar-brand::before {
        content: "A"; font-size: 18px; color: var(--brand);
    }
    .nav-item span, .nav-group-head span, .nav-group-head .caret { display: none; }
    .nav-item, .nav-group-head { justify-content: center; padding: 12px 6px; }
    .nav-sub { display: none !important; }
    .nav-item.sub { display: none !important; }
}

tr.highlight-secure { background: rgba(245, 158, 11, 0.08); }
tr.highlight-secure td { border-left-color: var(--brand); }