/* BitAxe Dashboard — dark theme (deliberately dark-only) */

:root {
  --page: #0d0d0d;
  --surface: #1a1a19;
  --surface-2: #232322;
  --border: rgba(255, 255, 255, 0.10);
  --grid: #2c2c2a;
  --ink: #ffffff;
  --ink-2: #c3c2b7;
  --muted: #898781;
  --series-1: #3987e5;   /* blue */
  --series-2: #199e70;   /* aqua */
  --series-3: #c98500;   /* yellow */
  --good: #0ca30c;
  --warning: #fab219;
  --serious: #ec835a;
  --critical: #d03b3b;
  --accent: #f7931a;     /* bitcoin orange, chrome accent only (never a series) */
  --radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 14px;
  line-height: 1.45;
}

a { color: var(--series-1); }

/* ---------- header ---------- */
header {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 20px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 20;
  flex-wrap: wrap;
}
.logo { font-weight: 700; font-size: 16px; display: flex; align-items: center; gap: 8px; }
.logo .coin { color: var(--accent); }

.miner-chips { display: flex; gap: 6px; flex-wrap: wrap; }
.chip {
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--ink-2);
  border-radius: 999px;
  padding: 4px 12px;
  cursor: pointer;
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.chip.active { border-color: var(--accent); color: var(--ink); }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--muted); }
.dot.online { background: var(--good); }
.dot.offline { background: var(--critical); }

header .spacer { flex: 1; }
.alerts-badge {
  background: var(--critical);
  color: #fff;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  padding: 2px 9px;
  display: none;
}
.alerts-badge.show { display: inline-block; }

/* ---------- nav tabs ---------- */
nav {
  display: flex;
  gap: 2px;
  padding: 0 20px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  overflow-x: auto;
}
nav button {
  appearance: none;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--muted);
  padding: 10px 14px;
  font: inherit;
  cursor: pointer;
  white-space: nowrap;
}
nav button.active { color: var(--ink); border-bottom-color: var(--accent); }
nav button:hover { color: var(--ink-2); }

main { max-width: 1280px; margin: 0 auto; padding: 20px; }
.tab { display: none; }
.tab.active { display: block; }

/* ---------- stat tiles ---------- */
.tiles {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 10px;
  margin-bottom: 18px;
}
.tile {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px;
  min-width: 0;
}
.tile .label { color: var(--muted); font-size: 12px; margin-bottom: 4px; }
.tile .value { font-size: 22px; font-weight: 600; }
.tile .value .unit { font-size: 13px; font-weight: 400; color: var(--ink-2); margin-left: 3px; }
.tile .sub { color: var(--muted); font-size: 12px; margin-top: 2px; }
.tile.hero { grid-column: span 2; }
.tile.hero .value { font-size: 48px; font-weight: 600; line-height: 1.1; }
.delta { font-size: 12px; font-weight: 600; }
.delta.up { color: var(--good); }
.delta.down { color: var(--critical); }
.status-chip { display: inline-flex; align-items: center; gap: 5px; font-size: 12px; }

/* ---------- filter row ---------- */
.filter-row {
  display: flex;
  align-items: center;
  gap: 6px;
  margin: 4px 0 14px;
  flex-wrap: wrap;
}
.filter-row .hint { color: var(--muted); font-size: 12px; margin-left: auto; }
.range-btn {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--ink-2);
  border-radius: 8px;
  padding: 5px 12px;
  cursor: pointer;
  font: inherit;
  font-size: 13px;
}
.range-btn.active { border-color: var(--accent); color: var(--ink); background: var(--surface-2); }

/* ---------- charts ---------- */
.charts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 14px;
}
.chart-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 14px 10px;
}
.chart-card h3 { margin: 0 0 10px; font-size: 13px; font-weight: 600; color: var(--ink-2); }
.chart-card .canvas-wrap { position: relative; height: 220px; }
.charts.loading .chart-card { opacity: 0.55; transition: opacity 0.2s; }

/* ---------- tables ---------- */
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th {
  text-align: left;
  color: var(--muted);
  font-weight: 500;
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
td { padding: 8px 10px; border-bottom: 1px solid var(--grid); vertical-align: top; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
.table-wrap { overflow-x: auto; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); }

.sev { display: inline-flex; align-items: center; gap: 5px; font-size: 12px; font-weight: 600; }
.sev::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: currentColor; }
.sev.info { color: var(--series-1); }
.sev.warning { color: var(--warning); }
.sev.error, .sev.serious { color: var(--serious); }
.sev.critical { color: var(--critical); }

/* ---------- forms / cards ---------- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  margin-bottom: 16px;
}
.card h2 { margin: 0 0 4px; font-size: 15px; }
.card .desc { color: var(--muted); font-size: 13px; margin: 0 0 14px; }

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: 12px;
}
.field label { display: block; color: var(--ink-2); font-size: 12px; margin-bottom: 4px; }
input[type="number"], input[type="text"], input[type="password"], select {
  width: 100%;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--ink);
  border-radius: 8px;
  padding: 7px 10px;
  font: inherit;
}
input:focus, select:focus { outline: none; border-color: var(--accent); }
.field.check { display: flex; align-items: center; gap: 8px; }
.field.check label { margin: 0; }

.btn {
  appearance: none;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--ink);
  border-radius: 8px;
  padding: 8px 16px;
  font: inherit;
  cursor: pointer;
}
.btn.primary { background: var(--accent); border-color: var(--accent); color: #101010; font-weight: 600; }
.btn:hover { filter: brightness(1.1); }
.btn-row { display: flex; gap: 10px; margin-top: 16px; align-items: center; }
.save-note { color: var(--good); font-size: 13px; opacity: 0; transition: opacity 0.3s; }
.save-note.show { opacity: 1; }
.save-note.err { color: var(--critical); }

.empty { color: var(--muted); padding: 30px; text-align: center; }

.tuner-state-badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
}
.tuner-state-badge.on { background: rgba(12, 163, 12, 0.15); color: var(--good); }
.tuner-state-badge.off { background: rgba(137, 135, 129, 0.15); color: var(--muted); }

/* ---------- login ---------- */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}
.login-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 36px;
  width: 320px;
  text-align: center;
}
.login-card h1 { font-size: 20px; margin: 0 0 6px; }
.login-card p { color: var(--muted); margin: 0 0 20px; font-size: 13px; }
.login-card input { text-align: center; font-size: 18px; letter-spacing: 4px; margin-bottom: 12px; }
.login-card .btn { width: 100%; }
.login-error { color: var(--critical); font-size: 13px; margin-top: 10px; min-height: 18px; }

@media (max-width: 640px) {
  .tile.hero { grid-column: span 2; }
  .tile.hero .value { font-size: 36px; }
  main { padding: 12px; }
}