:root {
  --bg: #0f172a; --panel: #1e293b; --line: #334155; --text: #e2e8f0;
  --muted: #94a3b8; --accent: #2563eb; --accent-hover: #1d4ed8; --danger: #ef4444;
  --ok: #22c55e;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bg); color: var(--text); }
h1, h2, h3 { margin: 0 0 .5rem; }
.muted { color: var(--muted); font-size: .85rem; }
.error { color: var(--danger); min-height: 1.2em; }
button { cursor: pointer; border: none; border-radius: 6px; padding: .5rem .9rem;
  background: var(--accent); color: #fff; font-size: .9rem; }
button:hover { background: var(--accent-hover); }
button.ghost { background: transparent; border: 1px solid var(--line); color: var(--text); }
input, textarea, select { width: 100%; padding: .5rem; border-radius: 6px;
  border: 1px solid var(--line); background: #0b1220; color: var(--text); font-size: .9rem; }
label { display: block; font-size: .8rem; color: var(--muted); margin-bottom: .6rem; }
label input, label textarea, label select { margin-top: .25rem; }
label.inline { display: inline-flex; align-items: center; gap: .4rem; width: auto; }
textarea { min-height: 180px; font-family: ui-monospace, Menlo, monospace; resize: vertical; }
textarea.tall { min-height: 240px; }

.center-view { min-height: 100vh; display: grid; place-items: center; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 1.5rem; }
.login-card { width: 340px; }
.login-card button { width: 100%; margin-top: .5rem; }

.topbar { display: flex; align-items: center; gap: .5rem; padding: .6rem 1rem;
  background: var(--panel); border-bottom: 1px solid var(--line); }
.brand { font-weight: 700; }
.topbar nav { display: flex; gap: .25rem; margin-left: 1rem; }
.tab { background: transparent; color: var(--muted); }
.tab.active { background: var(--accent); color: #fff; }
.spacer { flex: 1; }

main { padding: 1rem; }
.toolbar { display: flex; align-items: center; gap: .6rem; margin-bottom: 1rem; flex-wrap: wrap; }
.toolbar h2 { margin: 0; margin-right: auto; }

.data-table { width: 100%; border-collapse: collapse; background: var(--panel);
  border-radius: 10px; overflow: hidden; }
.data-table th, .data-table td { text-align: left; padding: .6rem .8rem;
  border-bottom: 1px solid var(--line); font-size: .88rem; }
.data-table th { color: var(--muted); font-weight: 600; }
.data-table tr:hover td { background: #24314a; }
.badge { padding: .15rem .5rem; border-radius: 999px; font-size: .75rem; }
.badge.new { background: #1e3a8a; } .badge.in_progress { background: #92400e; }
.badge.resolved { background: #166534; } .badge.closed { background: #374151; }
.dot { width: .6rem; height: .6rem; border-radius: 50%; display: inline-block; }
.dot.on { background: var(--ok); } .dot.off { background: var(--muted); }

.split { display: grid; grid-template-columns: 260px 1fr; gap: 1rem; }
.sidebar .list { list-style: none; padding: 0; margin: 0; }
.sidebar .list li { padding: .5rem .6rem; border-radius: 6px; cursor: pointer; }
.sidebar .list li:hover, .sidebar .list li.active { background: var(--panel); }
.editor-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.preview { width: 100%; height: 320px; border: 1px solid var(--line); border-radius: 8px; background: #fff; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: .5rem 1rem; margin-bottom: 1rem; }
.form-grid .full { grid-column: 1 / -1; }

.toast { position: fixed; bottom: 1rem; right: 1rem; background: var(--panel);
  border: 1px solid var(--line); border-left: 4px solid var(--ok); padding: .7rem 1rem;
  border-radius: 8px; box-shadow: 0 8px 24px rgba(0,0,0,.4); }
.toast.err { border-left-color: var(--danger); }

@media (max-width: 800px) {
  .split, .editor-grid, .form-grid { grid-template-columns: 1fr; }
}