:root {
  --bg: #0e1116;
  --bg-elev: #161b22;
  --bg-elev-2: #1c232c;
  --border: #262d38;
  --text: #e6edf3;
  --text-dim: #8b98a9;
  --accent: #4c9aff;
  --accent-dim: #2a4f80;
  --ok: #3fb950;
  --warn: #d29922;
  --err: #f85149;
  --radius: 10px;
  color-scheme: dark;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.5 -apple-system, "Segoe UI", Roboto, Ubuntu, sans-serif;
}

a { color: var(--accent); text-decoration: none; }
code, .mono { font-family: ui-monospace, "SF Mono", Consolas, monospace; font-size: 12.5px; }

/* ------------------------------------------------------------- auth screen */

.auth-wrap {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.auth-card {
  width: 100%;
  max-width: 420px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 32px;
}

.auth-card h1 { margin: 0 0 6px; font-size: 21px; }
.auth-card .sub { color: var(--text-dim); margin-bottom: 24px; }

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

.app { display: none; min-height: 100vh; grid-template-columns: 236px 1fr; }
.app.active { display: grid; }

.sidebar {
  background: var(--bg-elev);
  border-right: 1px solid var(--border);
  padding: 18px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.brand { padding: 6px 10px 16px; }
.brand b { font-size: 16px; }
.brand div { color: var(--text-dim); font-size: 12px; }

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-radius: 8px;
  cursor: pointer;
  color: var(--text-dim);
  user-select: none;
}
.nav-item:hover { background: var(--bg-elev-2); color: var(--text); }
.nav-item.active { background: var(--accent-dim); color: #fff; }
.nav-spacer { flex: 1; }

.main { padding: 26px 30px 60px; max-width: 1180px; }
.page { display: none; }
.page.active { display: block; }

.page-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px; gap: 16px; flex-wrap: wrap; }
.page-head h2 { margin: 0; font-size: 20px; }
.page-head p { margin: 4px 0 0; color: var(--text-dim); font-size: 13px; }

/* ------------------------------------------------------------------- cards */

.card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  margin-bottom: 16px;
}
.card h3 { margin: 0 0 4px; font-size: 15px; }
.card .card-help { color: var(--text-dim); font-size: 12.5px; margin: 0 0 16px; }

.grid { display: grid; gap: 12px; }
.grid.cols-2 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid.cols-4 { grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); }

.stat { background: var(--bg-elev); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; }
.stat .label { color: var(--text-dim); font-size: 12px; text-transform: uppercase; letter-spacing: .04em; }
.stat .value { font-size: 24px; font-weight: 600; margin-top: 6px; }
.stat .sub { color: var(--text-dim); font-size: 12px; margin-top: 2px; }

/* ------------------------------------------------------------------- forms */

.field { margin-bottom: 16px; }
.field label { display: block; font-weight: 500; margin-bottom: 5px; }
.field .help { color: var(--text-dim); font-size: 12.5px; margin-top: 5px; }

input[type=text], input[type=password], input[type=number], input[type=url], select, textarea {
  width: 100%;
  padding: 9px 11px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font: inherit;
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--accent); }
textarea { min-height: 74px; resize: vertical; font-family: ui-monospace, Consolas, monospace; font-size: 12.5px; }

.switch { display: flex; align-items: center; gap: 10px; cursor: pointer; }
.switch input { width: 18px; height: 18px; accent-color: var(--accent); }

.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.row > .grow { flex: 1; min-width: 160px; }

button {
  padding: 9px 15px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-elev-2);
  color: var(--text);
  font: inherit;
  cursor: pointer;
}
button:hover { border-color: var(--accent); }
button.primary { background: var(--accent); border-color: var(--accent); color: #06121f; font-weight: 600; }
button.danger { color: var(--err); }
button.small { padding: 5px 10px; font-size: 12.5px; }
button:disabled { opacity: .5; cursor: not-allowed; }

/* ------------------------------------------------------------------ tables */

table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--border); }
th { color: var(--text-dim); font-weight: 500; font-size: 12px; text-transform: uppercase; letter-spacing: .03em; }
tbody tr:hover { background: var(--bg-elev-2); }
.table-wrap { overflow-x: auto; }

/* ------------------------------------------------------------------ badges */

.badge { display: inline-block; padding: 2px 8px; border-radius: 20px; font-size: 11.5px; font-weight: 600; }
.badge.ok { background: rgba(63,185,80,.16); color: var(--ok); }
.badge.warn { background: rgba(210,153,34,.16); color: var(--warn); }
.badge.err { background: rgba(248,81,73,.16); color: var(--err); }
.badge.info { background: rgba(76,154,255,.16); color: var(--accent); }
.badge.muted { background: var(--bg-elev-2); color: var(--text-dim); }

/* -------------------------------------------------------------------- bars */

.bar { height: 8px; background: var(--bg-elev-2); border-radius: 4px; overflow: hidden; margin-top: 8px; }
.bar > span { display: block; height: 100%; background: var(--accent); transition: width .3s; }
.bar.warn > span { background: var(--warn); }
.bar.err > span { background: var(--err); }

.spark { display: flex; align-items: flex-end; gap: 2px; height: 60px; margin-top: 12px; }
.spark div { flex: 1; background: var(--accent-dim); border-radius: 2px 2px 0 0; min-height: 2px; }
.spark div.hit { background: var(--ok); }

/* ------------------------------------------------------------------ modals */

.modal-back {
  position: fixed; inset: 0; background: rgba(0,0,0,.6);
  display: none; place-items: center; padding: 20px; z-index: 50;
}
.modal-back.active { display: grid; }
.modal {
  background: var(--bg-elev); border: 1px solid var(--border); border-radius: 14px;
  padding: 24px; width: 100%; max-width: 560px; max-height: 88vh; overflow-y: auto;
}
.modal h3 { margin: 0 0 18px; }

/* ------------------------------------------------------------------ toasts */

.toasts { position: fixed; right: 18px; bottom: 18px; display: flex; flex-direction: column; gap: 8px; z-index: 100; }
.toast {
  background: var(--bg-elev-2); border: 1px solid var(--border); border-left: 3px solid var(--accent);
  padding: 11px 16px; border-radius: 8px; max-width: 380px; animation: slide .2s ease;
}
.toast.err { border-left-color: var(--err); }
.toast.ok { border-left-color: var(--ok); }
@keyframes slide { from { transform: translateX(20px); opacity: 0; } }

.err-text { color: var(--err); margin-top: 12px; min-height: 20px; font-size: 13px; }
.dim { color: var(--text-dim); }
.right { text-align: right; }
.nowrap { white-space: nowrap; }

.doc h4 { margin: 22px 0 8px; font-size: 14px; }
.doc p, .doc li { color: var(--text-dim); font-size: 13.5px; }
.doc pre {
  background: var(--bg); border: 1px solid var(--border); border-radius: 8px;
  padding: 12px 14px; overflow-x: auto; font-size: 12.5px; color: var(--text);
}
.doc ul { padding-left: 20px; }

@media (max-width: 780px) {
  .app.active { grid-template-columns: 1fr; }
  .sidebar { position: static; height: auto; flex-direction: row; flex-wrap: wrap; }
  .main { padding: 18px; }
}