:root {
  --bg: #0f1218;
  --bg2: #171c26;
  --bg3: #222a38;
  --line: #2e3a4d;
  --text: #e8eef7;
  --muted: #8b9bb0;
  --accent: #3d8bfd;
  --ok: #3dba74;
  --warn: #d4a017;
  --crit: #e05252;
  --font: "IBM Plex Sans", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; font-family: var(--font); color: var(--text);
  background: radial-gradient(900px 500px at 0% 0%, #1a2740 0%, transparent 55%), var(--bg); }
.hidden { display: none !important; }
.muted { color: var(--muted); font-size: 0.85rem; }
.err { color: var(--crit); margin: 0; font-size: 0.85rem; }

.login-screen { min-height: 100vh; display: grid; place-items: center; padding: 1.5rem; }
.login-card {
  width: min(380px, 100%); background: var(--bg2); border: 1px solid var(--line);
  border-radius: 14px; padding: 1.4rem; display: flex; flex-direction: column; gap: 0.75rem;
}
.login-card label { display: flex; flex-direction: column; gap: 0.3rem; font-size: 0.8rem; color: var(--muted); }
.login-card input, .form-grid input, .form-inline input, .select, textarea {
  background: var(--bg); border: 1px solid var(--line); border-radius: 8px;
  color: var(--text); padding: 0.5rem 0.65rem; font: inherit;
}
.brand { display: flex; gap: 0.75rem; align-items: center; }
.brand-mark {
  width: 36px; height: 36px; border-radius: 8px;
  background: linear-gradient(135deg, var(--accent), #1e5bb0);
}
.brand-name { font-weight: 700; }
.brand-sub { font-size: 0.75rem; color: var(--muted); }

.app { display: grid; grid-template-columns: 220px 1fr; min-height: 100vh; }
.sidebar {
  border-right: 1px solid var(--line); background: rgba(15,18,24,0.9);
  padding: 1.2rem 1rem; display: flex; flex-direction: column; gap: 1.25rem;
}
.nav { display: flex; flex-direction: column; gap: 0.25rem; }
.nav button {
  appearance: none; border: 0; background: transparent; color: var(--muted);
  text-align: left; padding: 0.6rem 0.8rem; border-radius: 8px; font: inherit; cursor: pointer;
}
.nav button:hover { background: var(--bg3); color: var(--text); }
.nav button.active { background: var(--bg3); color: var(--accent); font-weight: 600; }
.foot { margin-top: auto; display: flex; flex-direction: column; gap: 0.5rem; }
.main { padding: 1.25rem 1.5rem 2rem; }
.topbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1rem; }
.topbar h1 { margin: 0; font-size: 1.3rem; }
.view { display: none; } .view.active { display: block; }

.btn {
  appearance: none; border: 1px solid var(--line); background: var(--bg3);
  color: var(--text); border-radius: 8px; padding: 0.45rem 0.85rem; font: inherit; cursor: pointer;
}
.btn-accent { background: rgba(61,139,253,0.18); border-color: rgba(61,139,253,0.45); color: #9ec5ff; }
.btn-danger { background: rgba(224,82,82,0.15); border-color: rgba(224,82,82,0.4); color: #ffb4b4; }
.btn-sm { padding: 0.3rem 0.55rem; font-size: 0.8rem; }

.stat-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0.75rem; margin-bottom: 1rem; }
.stat { background: var(--bg2); border: 1px solid var(--line); border-radius: 12px; padding: 0.9rem 1rem; }
.stat .label { color: var(--muted); font-size: 0.8rem; }
.stat .value { font-family: var(--mono); font-size: 1.45rem; font-weight: 700; margin-top: 0.2rem; }

.panel {
  background: var(--bg2); border: 1px solid var(--line); border-radius: 12px;
  padding: 1rem; margin-bottom: 1rem;
}
.panel h2 { margin: 0 0 0.75rem; font-size: 1rem; }

.tier-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 0.75rem; }
.tier-card { background: rgba(0,0,0,0.2); border-radius: 10px; padding: 0.8rem; border: 1px solid var(--line); }
.tier-card h3 { margin: 0 0 0.2rem; font-size: 0.95rem; color: var(--accent); }
.tier-card p { margin: 0.15rem 0; font-size: 0.8rem; color: var(--muted); font-family: var(--mono); }
.tier-card .tier-code { font-size: 0.72rem; }
.tier-card .tier-desc {
  font-family: inherit; color: var(--text); line-height: 1.35; margin: 0.35rem 0 0.5rem; font-size: 0.84rem;
}
.tier-feats {
  margin: 0.4rem 0 0; padding-left: 1.1rem; font-size: 0.78rem; color: var(--muted);
  font-family: inherit; display: flex; flex-direction: column; gap: 0.12rem;
}

.form-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 0.65rem; align-items: end;
}
.form-grid label { display: flex; flex-direction: column; gap: 0.25rem; font-size: 0.8rem; color: var(--muted); }
.form-grid .span2 { grid-column: span 2; }
.form-inline { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1rem; }

.table { width: 100%; border-collapse: collapse; font-size: 0.82rem; }
.table th, .table td { text-align: left; padding: 0.5rem 0.4rem; border-bottom: 1px solid var(--line); vertical-align: top; }
.table th { color: var(--muted); font-size: 0.72rem; text-transform: uppercase; }
.table td { font-family: var(--mono); font-size: 0.76rem; }

.key-box {
  margin-top: 0.75rem; padding: 0.75rem; background: rgba(0,0,0,0.25);
  border-radius: 8px; font-family: var(--mono); font-size: 0.78rem; word-break: break-all;
}
.badge { display: inline-block; padding: 0.15rem 0.4rem; border-radius: 5px; font-size: 0.7rem; font-weight: 600; }
.badge.ok { background: rgba(61,186,116,0.15); color: var(--ok); }
.badge.bad { background: rgba(224,82,82,0.15); color: var(--crit); }

dialog {
  border: 1px solid var(--line); border-radius: 12px; background: var(--bg2); color: var(--text);
  padding: 0; max-width: 560px; width: calc(100% - 2rem);
}
dialog::backdrop { background: rgba(0,0,0,0.55); }
.dialog-body { padding: 1.1rem; }
.dialog-body textarea { width: 100%; margin: 0.5rem 0; font-family: var(--mono); font-size: 0.75rem; }
.dialog-actions { display: flex; justify-content: flex-end; }

@media (max-width: 800px) {
  .app { grid-template-columns: 1fr; }
  .stat-row { grid-template-columns: 1fr 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .form-grid .span2 { grid-column: span 1; }
}