:root {
  --bg: #0b0f14;
  --panel: #121821;
  --panel-raised: #161d27;
  --border: #212b37;
  --text: #e4e9f0;
  --muted: #7c8797;
  --accent: #4c9ffe;
  --success: #3ddc97;
  --running: #f5a623;
  --fail: #e5484d;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --sans: "Inter", system-ui, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 14px;
}

button, input, select { font-family: inherit; font-size: inherit; }

.app { display: flex; min-height: 100vh; }

/* ---- Rail (sidebar) ---- */
.rail {
  width: 220px;
  flex-shrink: 0;
  background: var(--panel);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 20px 14px;
}
.rail-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-weight: 600;
  font-size: 16px;
  padding: 0 6px 20px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}
.rail-brand-mark { color: var(--accent); }
.rail-nav { display: flex; flex-direction: column; gap: 2px; flex: 1; }
.rail-link {
  text-align: left;
  background: transparent;
  border: none;
  color: var(--muted);
  padding: 9px 10px;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 500;
}
.rail-link:hover { background: var(--panel-raised); color: var(--text); }
.rail-link.active { background: var(--panel-raised); color: var(--accent); }
.rail-foot {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  padding-top: 14px;
  border-top: 1px solid var(--border);
}

/* ---- Main ---- */
.main { flex: 1; padding: 32px 40px; max-width: 920px; }
.view-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 20px;
}
.view-head h1 { font-family: var(--mono); font-size: 22px; margin: 0; font-weight: 600; }
.view-head-actions { display: flex; gap: 8px; }
.muted { color: var(--muted); }
.mono { font-family: var(--mono); }

/* ---- Buttons ---- */
.btn {
  border: 1px solid var(--border);
  background: var(--panel-raised);
  color: var(--text);
  padding: 8px 14px;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 500;
}
.btn:hover { border-color: var(--accent); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #061018; font-weight: 600; }
.btn-primary:hover { filter: brightness(1.08); }
.btn-danger { color: var(--fail); }
.btn-danger:hover { border-color: var(--fail); }
.btn-ghost { background: transparent; }
.btn-sm { padding: 4px 10px; font-size: 12px; }

/* ---- Panels / lists ---- */
.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px 20px;
  margin-bottom: 18px;
}
.panel-title {
  font-family: var(--mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin: 0 0 12px;
}
.stack { display: flex; flex-direction: column; gap: 8px; }

.card-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 16px;
  cursor: pointer;
}
.card-row:hover { border-color: var(--accent); }
.card-row-main { display: flex; flex-direction: column; gap: 2px; }
.card-row-name { font-family: var(--mono); font-weight: 600; }
.card-row-meta { color: var(--muted); font-size: 12px; }
.card-row-right { display: flex; align-items: center; gap: 10px; }

.empty {
  color: var(--muted);
  border: 1px dashed var(--border);
  border-radius: 8px;
  padding: 30px;
  text-align: center;
}

/* ---- Status dot / badge ---- */
.dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; margin-right: 4px; }
.dot-idle { background: var(--muted); }
.dot-success { background: var(--success); }
.dot-running { background: var(--running); box-shadow: 0 0 0 3px rgba(245,166,35,0.18); animation: pulse 1.4s infinite; }
.dot-failed { background: var(--fail); }
.dot-pending { background: var(--muted); }

@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: 0.4; } }

.badge {
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 3px 9px;
  border-radius: 20px;
  border: 1px solid var(--border);
}
.badge-success { color: var(--success); border-color: var(--success); }
.badge-running { color: var(--running); border-color: var(--running); }
.badge-failed { color: var(--fail); border-color: var(--fail); }
.badge-pending, .badge-manual { color: var(--muted); }

/* ---- Form ---- */
.form { display: flex; flex-direction: column; gap: 16px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field span { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.05em; }
.field input, .field select {
  background: var(--panel-raised);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 9px 10px;
  color: var(--text);
}
.field input:focus, .field select:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
.form-actions { display: flex; justify-content: flex-end; }

/* Step editor rows */
.steps-list { display: flex; flex-direction: column; gap: 8px; margin-bottom: 10px; }
.step-row {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--panel-raised);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 10px;
}
.step-row-index { font-family: var(--mono); color: var(--muted); width: 18px; }
.step-row-type { font-family: var(--mono); font-weight: 600; width: 140px; }
.step-row input {
  flex: 1;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 6px 8px;
  color: var(--text);
  font-family: var(--mono);
  font-size: 12px;
}
.steps-add { display: flex; gap: 8px; }
.steps-add select {
  background: var(--panel-raised);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  padding: 8px 10px;
}

/* ---- Pipeline "chain" (signature element): steps as coupled containers ---- */
.chain {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  gap: 0;
}
.chain-link {
  position: relative;
  background: repeating-linear-gradient(
    var(--panel-raised),
    var(--panel-raised) 5px,
    #131a23 5px,
    #131a23 6px
  );
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 12px 16px;
  min-width: 150px;
  margin-right: 18px;
}
.chain-link::after {
  content: "";
  position: absolute;
  right: -18px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 2px;
  background: var(--border);
}
.chain-link:last-child { margin-right: 0; }
.chain-link:last-child::after { display: none; }
.chain-link-type {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--accent);
}
.chain-link-detail {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  margin-top: 4px;
  word-break: break-all;
}

/* ---- Terminal (run logs) ---- */
.terminal {
  background: #05080b;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px 18px;
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 70vh;
  overflow-y: auto;
}
.log-line-error { color: var(--fail); }
.log-line-step { color: var(--accent); font-weight: 600; }
.log-line-info { color: var(--text); }

/* ---- Optimize view ---- */
.code-input {
  background: #05080b;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px 14px;
  color: var(--text);
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.6;
  resize: vertical;
}
.code-input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }

.change-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.change-list li {
  font-size: 13px;
  padding-left: 20px;
  position: relative;
  line-height: 1.5;
}
.change-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--success);
  font-weight: 700;
}
.change-list-suggestion { margin-top: 10px; padding-top: 10px; border-top: 1px dashed var(--border); }
.change-list-suggestion li::before { content: "?"; color: var(--running); }
.change-list-suggestion li { color: var(--muted); }

.diff-view { max-height: 50vh; }
.diff-line-added { background: rgba(61, 220, 151, 0.08); color: var(--success); display: block; }
.diff-line-removed { background: rgba(229, 72, 77, 0.08); color: var(--fail); display: block; text-decoration: line-through; text-decoration-color: rgba(229,72,77,0.4); }
.diff-line-context { color: var(--muted); display: block; }

/* ---- Storage gauge ---- */
.gauge-track {
  width: 100%;
  height: 10px;
  background: var(--panel-raised);
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
}
.gauge-fill {
  height: 100%;
  width: 0%;
  background: var(--success);
  transition: width 0.4s ease, background 0.4s ease;
}
.gauge-fill.gauge-warn { background: var(--running); }
.gauge-fill.gauge-danger { background: var(--fail); }

/* ---- Insights panel ---- */
.insight-row { display: flex; gap: 24px; flex-wrap: wrap; margin-bottom: 14px; }
.insight-stat { display: flex; flex-direction: column; gap: 2px; }
.insight-stat-label { font-size: 11px; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); }
.insight-stat-value { font-family: var(--mono); font-size: 15px; font-weight: 600; }
.failure-pattern { padding: 8px 0; border-top: 1px solid var(--border); font-size: 13px; }
.failure-pattern:first-child { border-top: none; }
.failure-pattern-count { color: var(--fail); font-family: var(--mono); font-weight: 700; margin-right: 6px; }

/* ---- Optimize: security banner + category groups ---- */
.security-banner {
  background: rgba(76, 159, 254, 0.08);
  border: 1px solid var(--accent);
  color: var(--text);
  border-radius: 8px;
  padding: 12px 16px;
  margin-bottom: 18px;
  font-size: 13px;
  line-height: 1.5;
}
.category-group { margin-bottom: 16px; }
.category-group:last-child { margin-bottom: 0; }
.category-group-head {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}