:root {
  --bg: #0f1115;
  --bg-elev: #171a21;
  --bg-elev-2: #1f232c;
  --border: #2a2f3a;
  --text: #e5e8ef;
  --text-dim: #9aa2b1;
  --accent: #6aa9ff;
  --accent-strong: #3c82f6;
  --success: #35c27b;
  --warn: #e4a94b;
  --danger: #e56466;
  --radius: 8px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.45 var(--font);
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.topbar {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 12px 24px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-elev);
}
.topbar .brand { font-weight: 700; letter-spacing: .2px; }
.topbar nav { display: flex; gap: 16px; flex: 1; }
.topbar nav a { color: var(--text-dim); }
.topbar nav a:hover { color: var(--text); text-decoration: none; }
.topbar .session { display: flex; align-items: center; gap: 12px; }
.topbar .heartbeat { color: var(--text-dim); font-family: var(--mono); font-size: 12px; }
.topbar .logout-form { margin: 0; }

main { max-width: 1280px; margin: 0 auto; padding: 24px; }

button, .button, .button-secondary {
  appearance: none;
  font: inherit;
  padding: 8px 14px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-elev-2);
  color: var(--text);
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
}
button:hover, .button:hover { border-color: var(--accent); }
button:disabled { opacity: .5; cursor: not-allowed; }
button.danger { border-color: var(--danger); color: var(--danger); background: transparent; }
button.danger:hover { background: rgba(229,100,102,.1); }
.button-secondary { background: transparent; }

.error {
  background: rgba(229,100,102,.12);
  border: 1px solid var(--danger);
  color: var(--danger);
  padding: 10px 14px;
  border-radius: var(--radius);
  margin-bottom: 16px;
}

.dashboard-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}
.dashboard-header h1 { font-size: 20px; margin: 0; }

.empty {
  text-align: center;
  padding: 48px 24px;
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  color: var(--text-dim);
}
.empty .button { margin-top: 12px; }

.tile-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 16px;
}

.tile {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  position: relative;
  transition: border-color .12s ease, transform .12s ease;
}
.tile:hover { border-color: var(--accent); }
.tile-link {
  position: absolute;
  inset: 0;
  z-index: 0;
  border-radius: var(--radius);
  background: transparent;
  text-decoration: none;
}
.tile > *:not(.tile-link) { position: relative; z-index: 1; }
.tile-primary-action { display: flex; gap: 8px; }
.tile-primary-action .inline { margin: 0; }
.tile-primary-action:empty { display: none; }
.tile-head { display: flex; justify-content: space-between; align-items: center; }
.tile-name { font-weight: 600; }
.tile-header-right { display: flex; align-items: center; gap: 10px; }
.tile-status { font-size: 12px; color: var(--text-dim); text-transform: uppercase; letter-spacing: .5px; }
.tile-idle .tile-status { color: var(--text-dim); }

.tile-last-seen {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-dim);
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.tile-last-seen::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--text-dim);
}
.tile-last-seen.online { color: var(--success); }
.tile-last-seen.online::before { background: var(--success); }
.tile-last-seen.stale::before { background: var(--warn); }
.tile-last-seen.offline::before { background: var(--text-dim); opacity: .5; }

.tile-meta { display: grid; grid-template-columns: 1fr 1fr; gap: 4px 16px; margin: 0; font-size: 13px; }
.tile-meta div { display: flex; justify-content: space-between; align-items: baseline; }
.tile-meta dt { color: var(--text-dim); }
.tile-meta dd { margin: 0; font-family: var(--mono); }

.tile-actions { display: flex; gap: 8px; }
.tile-actions .inline { margin: 0; flex: 0; }

.tile-meta dd.bad { color: var(--danger); }

.tile-hold {
  background: rgba(229,100,102,.08);
  border: 1px solid rgba(229,100,102,.35);
  border-radius: var(--radius);
  padding: 8px 10px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.tile-hold .hold-title {
  font-size: 12px;
  color: var(--danger);
  text-transform: uppercase;
  letter-spacing: .5px;
}
.tile-hold .hold-ssh {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text);
  word-break: break-all;
  user-select: all;
}

.tile-log {
  background: #0b0d12;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px 10px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-dim);
  max-height: 160px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.tile-log:empty { display: none; }
.tile-log .log-line { white-space: pre-wrap; }
.tile-log .log-warn { color: var(--warn); }
.tile-log .log-error { color: var(--danger); }

.tile-fail { border-color: rgba(229,100,102,.6); }
.tile-pass { border-color: rgba(53,194,123,.5); }
.tile-active { border-color: var(--accent); }

.form-wrap { max-width: 640px; }
.form-wrap h1 { font-size: 20px; }

.host-form { display: flex; flex-direction: column; gap: 14px; }
.host-form label { display: flex; flex-direction: column; gap: 4px; color: var(--text-dim); font-size: 13px; }
.host-form input,
.host-form textarea {
  font: inherit;
  font-family: var(--mono);
  color: var(--text);
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px 10px;
}
.host-form textarea { resize: vertical; min-height: 96px; }
.host-form .grid-2 { display: grid; grid-template-columns: 2fr 1fr; gap: 14px; }
.host-form .actions { display: flex; gap: 10px; margin-top: 4px; }

.login-card {
  max-width: 360px;
  margin: 12vh auto;
  padding: 28px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.login-card h1 { margin: 0 0 16px; font-size: 22px; }
.login-card label { display: flex; flex-direction: column; gap: 4px; color: var(--text-dim); font-size: 13px; }
.login-card input {
  font: inherit;
  color: var(--text);
  background: var(--bg-elev-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px;
  margin-bottom: 12px;
}
.login-card button { width: 100%; background: var(--accent-strong); border-color: var(--accent-strong); color: #fff; }
.login-card button:hover { background: var(--accent); border-color: var(--accent); }

body.bare main { max-width: none; }

.quick-register {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  margin-bottom: 20px;
}
.quick-register h2 { margin: 0 0 8px; font-size: 16px; }
.quick-register p { margin: 6px 0; font-size: 13px; color: var(--text-dim); }
.quick-register p b { color: var(--text); }
.quick-register .muted { color: var(--text-dim); font-weight: 400; }
.quick-register code { font-family: var(--mono); }
.quick-register .one-liner {
  background: #0b0d12;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 12px;
  margin: 8px 0;
  overflow-x: auto;
  user-select: all;
  font-size: 13px;
  color: var(--text);
}
.quick-register .one-liner code { white-space: pre; }

.manual-register { margin-top: 16px; }
.manual-register summary {
  cursor: pointer;
  color: var(--text-dim);
  font-size: 13px;
  padding: 6px 0;
}
.manual-register summary:hover { color: var(--text); }
.manual-register[open] summary { margin-bottom: 12px; }

/* ===== Host detail page ===== */
.detail { display: flex; flex-direction: column; gap: 20px; }
.breadcrumb { color: var(--text-dim); font-size: 13px; display: flex; gap: 6px; }
.breadcrumb a { color: var(--text-dim); }
.breadcrumb a:hover { color: var(--text); }
.breadcrumb-sep { opacity: .5; }

.detail-summary {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.detail-summary.tile-fail { border-color: rgba(229,100,102,.6); }
.detail-summary.tile-pass { border-color: rgba(53,194,123,.5); }
.detail-summary.tile-active { border-color: var(--accent); }
.detail-summary-head { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; flex-wrap: wrap; }
.detail-name { margin: 0; font-size: 22px; }
.detail-status-row { display: flex; align-items: center; gap: 12px; }
.detail-meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 8px 24px;
  margin: 0;
  font-size: 13px;
}
.detail-meta div { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; }
.detail-meta dt { color: var(--text-dim); }
.detail-meta dd { margin: 0; font-family: var(--mono); }
.detail-meta dd.bad { color: var(--danger); }

.detail-section {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
}
.detail-section h2 { margin: 0 0 12px; font-size: 15px; color: var(--text-dim); text-transform: uppercase; letter-spacing: .5px; font-weight: 600; }
.detail-section details > summary { list-style: none; cursor: pointer; display: flex; align-items: center; gap: 8px; }
.detail-section details > summary::before { content: "▸"; color: var(--text-dim); font-size: 12px; transition: transform .1s ease; }
.detail-section details[open] > summary::before { transform: rotate(90deg); }
.detail-section details > summary h2 { margin: 0; }

.detail-hold {
  background: rgba(229,100,102,.08);
  border-color: rgba(229,100,102,.35);
}
.detail-hold h2 { color: var(--danger); }
.hold-ssh {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--text);
  word-break: break-all;
  user-select: all;
  display: block;
  padding: 10px 12px;
  background: #0b0d12;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.detail-actions-row { display: flex; flex-wrap: wrap; gap: 10px; }
.detail-actions-row .inline { margin: 0; }

.detail-log {
  background: #0b0d12;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 12px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-dim);
  max-height: 500px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.detail-log:empty::before { content: "(no log output yet)"; color: var(--text-dim); opacity: .5; }
.detail-log .log-line { white-space: pre-wrap; }
.detail-log .log-warn { color: var(--warn); }
.detail-log .log-error { color: var(--danger); }

/* ===== Log tabs (CSS-only radio switch) ===== */
/* Radios are visually hidden but still functional: checked state is read
   by sibling selectors below to flip the active label + pane. */
.log-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #0b0d12;
  overflow: hidden;
}
.log-tab-input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
  width: 0;
  height: 0;
}
.log-tab-label {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  font-size: 12px;
  font-family: var(--mono);
  color: var(--text-dim);
  cursor: pointer;
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  user-select: none;
  background: transparent;
  transition: background .12s ease, color .12s ease;
}
.log-tab-label:hover { background: rgba(255,255,255,.03); color: var(--text); }
/* Active tab: coloured bar + filled background. */
.log-tab-input:checked + .log-tab-label {
  background: var(--bg-elev-2);
  color: var(--text);
  box-shadow: inset 0 -2px 0 0 var(--accent);
}
.log-pane {
  display: none;
  flex-basis: 100%;
  flex-direction: column;
  gap: 2px;
  padding: 10px 12px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-dim);
  max-height: 500px;
  overflow-y: auto;
  order: 99; /* keep panes below the tab labels in flex order */
}
.log-pane .log-line { white-space: pre-wrap; }
.log-pane .log-warn { color: var(--warn); }
.log-pane .log-error { color: var(--danger); }
.log-pane .log-stage { color: var(--text-dim); opacity: .75; margin-right: 4px; }
.log-pane:empty::before { content: "(no log output yet)"; color: var(--text-dim); opacity: .5; }

/* Sibling-selector cascade: .log-tab-all:checked flips .log-pane-all,
   .log-tab-Inventory:checked flips .log-pane-Inventory, etc. The radios
   live as siblings of the panes inside .log-tabs, so ~ works. */
.log-tab-all:checked ~ .log-pane-all { display: flex; }
.log-tab-Inventory:checked ~ .log-pane-Inventory { display: flex; }
.log-tab-SpecValidate:checked ~ .log-pane-SpecValidate { display: flex; }
.log-tab-SMART:checked ~ .log-pane-SMART { display: flex; }
.log-tab-CPUStress:checked ~ .log-pane-CPUStress { display: flex; }
.log-tab-Storage:checked ~ .log-pane-Storage { display: flex; }
.log-tab-Network:checked ~ .log-pane-Network { display: flex; }
.log-tab-GPU:checked ~ .log-pane-GPU { display: flex; }
.log-tab-PSU:checked ~ .log-pane-PSU { display: flex; }
.log-tab-Reporting:checked ~ .log-pane-Reporting { display: flex; }

.diff-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.diff-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 12px;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 13px;
}
.diff-row code { font-family: var(--mono); font-size: 12px; color: var(--text); }
.diff-field { font-weight: 600; }
.diff-expected, .diff-actual { color: var(--text-dim); }
.diff-critical { border-color: rgba(229,100,102,.5); background: rgba(229,100,102,.06); }
.diff-critical .diff-field { color: var(--danger); }
.diff-warning { border-color: rgba(228,169,75,.45); background: rgba(228,169,75,.05); }
.diff-warning .diff-field { color: var(--warn); }
.diff-info { opacity: .75; }

.detail-host-meta h3 { margin: 12px 0 6px; font-size: 13px; color: var(--text-dim); }
.detail-notes p { margin: 0; color: var(--text); }
.detail-spec-yaml {
  font-family: var(--mono);
  font-size: 12px;
  background: #0b0d12;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 12px;
  white-space: pre;
  overflow-x: auto;
  margin: 0;
}

/* ===== Pipeline timeline =====
   13 nodes (3 pre-stage + 9 stage + Completed). flex:1 on every node
   so they share the full width evenly; overflow-x:auto only kicks in
   on very narrow viewports. */
.pipeline {
  display: flex;
  align-items: stretch;
  gap: 0;
  width: 100%;
  overflow-x: auto;
  padding: 28px 12px 16px;
  background: #0b0d12;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.stage-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  flex: 1 1 0;
  min-width: 72px;
  padding: 0 4px;
}
.stage-dot {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  border: 2px solid var(--border);
  background: var(--bg-elev-2);
  color: var(--text-dim);
  line-height: 1;
  transition: transform .12s ease, box-shadow .12s ease;
}
.stage-node:hover .stage-dot { transform: scale(1.12); }
.stage-dot-passed { background: var(--success); border-color: var(--success); color: #0b0d12; }
.stage-dot-running { background: var(--accent-strong); border-color: var(--accent); color: #fff; animation: pulse 1.2s ease-in-out infinite; }
.stage-dot-failed { background: var(--danger); border-color: var(--danger); color: #fff; }
.stage-dot-skipped { background: transparent; border-color: var(--border); color: var(--text-dim); opacity: .45; }
.stage-dot-pending { background: transparent; border-color: var(--border); color: transparent; }

.stage-name {
  font-size: 12px;
  color: var(--text-dim);
  text-align: center;
  font-weight: 500;
  line-height: 1.2;
}
.stage-node-passed .stage-name { color: var(--text); }
.stage-node-running .stage-name { color: var(--accent); font-weight: 600; }
.stage-node-failed .stage-name { color: var(--danger); font-weight: 600; }
.stage-node-skipped .stage-name { opacity: .5; }
.stage-duration { font-size: 10px; color: var(--text-dim); font-family: var(--mono); min-height: 12px; }

.stage-connector {
  flex: 1 1 0;
  min-width: 8px;
  height: 3px;
  align-self: center;
  margin-top: -30px;
  background: var(--border);
  border-radius: 2px;
}
.stage-connector-passed { background: var(--success); }
.stage-connector-running { background: linear-gradient(90deg, var(--success), var(--accent)); }
.stage-connector-failed { background: var(--danger); }
.stage-connector-skipped { background: var(--border); opacity: .5; }

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(60,130,246,.55); }
  50%       { box-shadow: 0 0 0 8px rgba(60,130,246,0); }
}