:root {
  --bg: #0f1214;
  --panel: #171b1e;
  --panel-2: #1e2327;
  --line: #2a3034;
  --text: #e7ebed;
  --muted: #9aa0a4;
  --accent: #3fdce8;
  --accent-dim: #178a9a;
  --ok: #22c55e;
  --warn: #f59e0b;
  --bad: #ef4444;
  --radius: 10px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.45 "Segoe UI", system-ui, sans-serif;
}

.hidden { display: none !important; }

.brand {
  font-size: 26px;
  font-weight: 700;
  letter-spacing: 2px;
  margin: 0 0 18px;
}
.brand span {
  color: var(--accent);
  font-size: 13px;
  letter-spacing: 3px;
  margin-left: 8px;
  vertical-align: middle;
}
.brand.small { font-size: 18px; letter-spacing: 1px; margin: 4px 0 20px; }

/* ---------- login ---------- */
.login {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  background: radial-gradient(1200px 500px at 30% 0%, rgba(0, 130, 154, .25), transparent 60%), var(--bg);
}
.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
}
.login-card { width: 340px; display: grid; gap: 12px; }
.login-card label { display: grid; gap: 6px; font-size: 12px; color: var(--muted); }
.login-card input {
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  color: var(--text);
  font-size: 14px;
  outline: none;
}
.login-card input:focus { border-color: var(--accent-dim); }

button { font: inherit; cursor: pointer; }
.primary {
  background: linear-gradient(90deg, var(--accent-dim), #0f6f80);
  border: 0;
  color: #fff;
  padding: 10px 14px;
  border-radius: 8px;
  font-weight: 600;
}
.primary:hover { filter: brightness(1.1); }
.ghost {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--text);
  padding: 8px 12px;
  border-radius: 8px;
}
.ghost:hover { border-color: var(--accent-dim); }
.danger {
  background: rgba(239, 68, 68, .15);
  border: 1px solid rgba(239, 68, 68, .5);
  color: #fca5a5;
  padding: 8px 12px;
  border-radius: 8px;
}
.link {
  background: none;
  border: 0;
  color: var(--accent);
  padding: 0;
  text-decoration: underline;
}

.error { color: var(--bad); font-size: 12px; margin: 4px 0 0; min-height: 16px; }

/* ---------- shell ---------- */
.app { display: grid; grid-template-columns: 220px 1fr; height: 100%; }
.sidebar {
  background: var(--panel);
  border-right: 1px solid var(--line);
  padding: 18px 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.nav-item {
  display: block;
  width: 100%;
  text-align: left;
  background: transparent;
  border: 0;
  color: var(--muted);
  padding: 9px 10px;
  border-radius: 8px;
}
.nav-item:hover { background: var(--panel-2); color: var(--text); }
.nav-item.active { background: rgba(63, 220, 232, .12); color: var(--accent); }
.sidebar-footer {
  margin-top: auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--muted);
  border-top: 1px solid var(--line);
  padding-top: 12px;
}

.content { padding: 22px 26px; overflow: auto; }
h2 { margin: 0 0 16px; font-size: 20px; }
h3 { margin: 18px 0 10px; font-size: 15px; color: var(--muted); font-weight: 600; }

/* ---------- blocks ---------- */
.grid { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); }
.stat {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 16px;
}
.stat .label { color: var(--muted); font-size: 12px; }
.stat .value { font-size: 24px; font-weight: 700; margin-top: 4px; }

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 16px;
}
.panel-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; gap: 10px; }

table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: middle; }
th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .04em; }
tr:hover td { background: rgba(255, 255, 255, .02); }

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 11px;
  border: 1px solid var(--line);
  color: var(--muted);
}
.badge.ok { color: var(--ok); border-color: rgba(34, 197, 94, .4); }
.badge.warn { color: var(--warn); border-color: rgba(245, 158, 11, .4); }
.badge.bad { color: var(--bad); border-color: rgba(239, 68, 68, .4); }
.badge.accent { color: var(--accent); border-color: rgba(63, 220, 232, .4); }

.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.muted { color: var(--muted); }
.mono { font-family: Consolas, "Cascadia Mono", monospace; font-size: 12px; }

input, select, textarea {
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 10px;
  color: var(--text);
  font: inherit;
  outline: none;
}
input:focus, select:focus, textarea:focus { border-color: var(--accent-dim); }
textarea { width: 100%; min-height: 70px; resize: vertical; }
label.field { display: grid; gap: 6px; font-size: 12px; color: var(--muted); }

.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px; }

.icon-btn { background: transparent; border: 0; color: var(--muted); padding: 4px 6px; }
.icon-btn:hover { color: var(--text); }

.toast {
  position: fixed;
  right: 20px;
  bottom: 20px;
  background: var(--panel-2);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  padding: 10px 14px;
  border-radius: 8px;
  max-width: 380px;
  font-size: 13px;
}
.toast.bad { border-left-color: var(--bad); }