:root {
  --bg: #0d1117;
  --panel: #161b22;
  --panel-2: #1c2330;
  --border: #2b3444;
  --text: #e6edf3;
  --muted: #8b98a9;
  --accent: #58a6ff;
  --isr: #f0b429;
  --task: #58a6ff;
  --bad: #f85149;
  --ok: #3fb950;
  --warn: #d29922;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

/* ---------- Header ---------- */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 22px;
  background: linear-gradient(90deg, #121a2b, #161b22);
  border-bottom: 1px solid var(--border);
  flex-wrap: nowrap;
  gap: 10px;
}
.title-block { flex: 0 1 auto; min-width: 0; }
.title-block h1 { margin: 0; font-size: 18px; letter-spacing: .3px; white-space: nowrap; }
.title-link { color: var(--text); text-decoration: none; border-bottom: 1px dashed transparent; transition: color .15s, border-color .15s; }
.title-link:hover { color: var(--accent); border-bottom-color: var(--accent); }
.subtitle { margin: 2px 0 0; color: var(--muted); font-size: 11.5px; }
.byline { margin: 2px 0 0; font-size: 11px; color: var(--muted); }
.byline a { color: var(--accent); text-decoration: none; border-bottom: 1px dashed transparent; transition: border-color .15s; }
.byline a:hover { border-bottom-color: var(--accent); }

/* Inline simulation config in the header */
.sim-inline {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  padding: 4px 8px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: rgba(13, 20, 32, 0.5);
  flex: 1 1 auto;
  min-width: 0;
  justify-content: center;
}
.sim-title { font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .5px; color: var(--accent); padding-right: 6px; }
.sim-field {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 3px 8px;
  border-radius: 6px;
  background: var(--panel-2);
  border: 1px solid var(--border);
}
.sim-lbl { display: flex; align-items: baseline; gap: 4px; font-size: 10px; font-weight: 600; color: var(--text); }
.sim-inline .unit { font-size: 8.5px; font-weight: 400; color: var(--muted); }
.sim-inline input[type="number"] {
  width: 78px;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 2px 6px;
  font-size: 11px;
}
.sim-inline select {
  width: auto;
  min-width: 120px;
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 2px 6px;
  font-size: 11px;
  font-family: inherit;
}
.sim-chk { justify-content: center; }
.sim-chk .sim-lbl { justify-content: center; }
.sim-inline input[type="checkbox"] { width: 15px; height: 15px; accent-color: var(--accent); cursor: pointer; align-self: center; margin: 1px 0; }

.sim-controls { display: flex; gap: 8px; flex: 0 0 auto; align-items: center; }

/* ---------- Buttons ---------- */
.btn {
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 9px 16px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  transition: .15s;
  white-space: nowrap;
}
.btn:hover:not(:disabled) { border-color: var(--accent); background: #222c3d; }
.btn:disabled { opacity: .4; cursor: not-allowed; }
.btn-primary { background: var(--accent); color: #06101f; border-color: var(--accent); }
.btn-primary:hover:not(:disabled) { background: #79b8ff; }
.btn-ghost { background: transparent; }
.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-off { opacity: .6; border-style: dashed; }
.upload-btn { display: inline-flex; align-items: center; }

/* ---------- Error banner ---------- */
.error-banner {
  margin: 12px 22px 0;
  padding: 10px 14px;
  border-radius: 8px;
  background: rgba(248,81,73,.14);
  border: 1px solid rgba(248,81,73,.4);
  color: #ffb4ad;
  font-size: 13px;
}

/* ---------- Layout ---------- */
.layout { display: flex; flex-direction: column; gap: 16px; padding: 16px; }
.workspace { display: flex; flex-direction: column; gap: 16px; min-width: 0; }

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
}
.panel h2 {
  margin: 0 0 12px;
  font-size: 15px;
  display: flex;
  align-items: baseline;
  gap: 8px;
  flex-wrap: wrap;
}
.panel h2 .hint { font-weight: 400; }
.panel-actions { margin-left: auto; display: flex; gap: 6px; }
.unit { color: #5f6b7c; font-size: 11px; }

/* ---------- Tables ---------- */
.table-scroll { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 12.5px; }
th, td { text-align: left; padding: 5px 8px; border-bottom: 1px solid var(--border); white-space: nowrap; }
th { color: var(--muted); font-weight: 600; font-size: 11px; text-transform: uppercase; letter-spacing: .3px; vertical-align: bottom; }
th .unit { text-transform: none; letter-spacing: 0; }

.stats-table td { font-variant-numeric: tabular-nums; }
.stats-table .row-bad td { background: rgba(248,81,73,.09); }
.ellipsis { max-width: 130px; overflow: hidden; text-overflow: ellipsis; }
.dot { display: inline-block; width: 9px; height: 9px; border-radius: 50%; margin-right: 6px; vertical-align: middle; }

/* Entity editor */
.entity-table input.mini,
.entity-table input.name-in {
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 4px 6px;
  font-size: 12px;
}
.entity-table input.mini { width: 72px; font-variant-numeric: tabular-nums; }
.entity-table select.mini-select { width: 56px; padding: 3px 4px; font-family: inherit; }
.entity-table input.name-in { width: 130px; }
.entity-table input:focus { outline: none; border-color: var(--accent); }
.entity-table input:disabled { opacity: .45; }
.entity-table input::placeholder { color: #5f6b7c; }
.entity-table .row-off td { opacity: .45; }
.entity-table .st { font-variant-numeric: tabular-nums; color: var(--muted); text-align: right; }
.entity-table .row-bad td { background: rgba(248,81,73,.09); }
.entity-table .row-bad .st-miss { color: var(--bad); font-weight: 700; }
.col-sep, .entity-table .st-sep { border-left: 2px solid var(--border); }
.entity-table.single-core .col-core { display: none; }

/* ---------- Core tabs ---------- */
.core-tabs { display: flex; gap: 4px; flex-wrap: wrap; margin-bottom: 10px; border-bottom: 1px solid var(--border); }
.core-tab {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--panel-2);
  color: var(--muted);
  border: 1px solid var(--border);
  border-bottom: none;
  border-radius: 8px 8px 0 0;
  padding: 6px 14px;
  margin-bottom: -1px;
  cursor: pointer;
  font-size: 12.5px;
  font-weight: 600;
  transition: .12s;
}
.core-tab:hover { color: var(--text); border-color: var(--accent); }
.core-tab.active { background: var(--panel); color: var(--accent); border-color: var(--border); border-bottom: 1px solid var(--panel); }
.core-tab .tab-count {
  font-size: 10.5px;
  font-weight: 700;
  color: var(--muted);
  background: var(--bg);
  border-radius: 10px;
  padding: 0 6px;
  min-width: 18px;
  text-align: center;
}
.core-tab.active .tab-count { color: var(--accent); }
.row-del { background: transparent; border: 1px solid transparent; color: var(--muted); border-radius: 5px; padding: 2px 7px; cursor: pointer; font-size: 13px; }
.row-del:hover { color: var(--bad); border-color: rgba(248,81,73,.4); background: rgba(248,81,73,.1); }

.hint { color: var(--muted); font-size: 12px; }
.hint-block { margin: 10px 0 0; line-height: 1.6; }
.hint-block strong { color: var(--text); }

/* ---------- Gantt ---------- */
.gantt-stack { display: flex; flex-direction: column; gap: 16px; }
.core-gantt-head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px 10px;
  margin-bottom: 6px;
}
.core-gantt-title { font-size: 12px; font-weight: 700; color: var(--text); letter-spacing: .3px; }
.core-summary { display: flex; flex-wrap: wrap; gap: 5px; }
.core-chip {
  display: inline-flex;
  align-items: baseline;
  gap: 5px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 2px 7px;
  font-size: 10.5px;
  line-height: 1.5;
  white-space: nowrap;
}
.core-chip-label { color: var(--muted); }
.core-chip-value { font-weight: 700; font-variant-numeric: tabular-nums; color: var(--text); }
.core-chip.bad .core-chip-value { color: var(--bad); }
.core-chip.ok .core-chip-value { color: var(--ok); }
.core-chip.isr .core-chip-value { color: var(--isr); }
.core-chip.task .core-chip-value { color: var(--accent); }
.legend { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 10px; font-size: 11.5px; color: var(--muted); }
.legend-item { display: flex; align-items: center; gap: 6px; }
.swatch { display: inline-block; width: 14px; height: 10px; border-radius: 2px; }
.swatch.exec { background: var(--accent); }
.swatch.pending { background: rgba(255,255,255,0.22); }
.swatch.activation { background: #f5d442; clip-path: polygon(0 0, 100% 0, 50% 100%); }
.swatch.miss { background: rgba(248,81,73,.5); }
.swatch.idle { background: rgba(120,128,140,.4); }
.canvas-wrap { width: 100%; overflow-x: auto; }
#ganttCanvas, .gantt-canvas { width: 100%; display: block; }

/* ---------- Responsive ---------- */
@media (max-width: 820px) {
  .app-header { flex-wrap: wrap; justify-content: center; text-align: center; padding: 10px 14px; gap: 8px; }
  .title-block { flex: 1 1 100%; text-align: center; }
  .title-block h1 { white-space: normal; font-size: 16px; }
  .sim-inline { flex: 1 1 100%; order: 3; }
  .sim-controls { flex: 1 1 100%; order: 2; justify-content: center; flex-wrap: wrap; }
}

/* ---------- Footer ---------- */
.app-footer { margin-top: 12px; border-top: 1px solid var(--border); background: var(--panel); }
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.footer-credit { display: flex; flex-direction: column; gap: 2px; }
.footer-by { font-size: 13.5px; color: var(--text); }
.footer-by strong { color: var(--accent); }
.footer-role { font-size: 12px; color: var(--muted); }
.footer-links { display: flex; gap: 16px; flex-wrap: wrap; }
.footer-links a { color: var(--accent); text-decoration: none; font-size: 13px; border-bottom: 1px solid transparent; transition: border-color .15s; }
.footer-links a:hover { border-bottom-color: var(--accent); }
.footer-meta {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 10px;
  align-items: center;
  font-size: 11.5px;
  color: var(--muted);
}
.footer-meta .footer-dot { color: var(--border); }
@media (max-width: 720px) {
  .footer-inner { flex-direction: column; align-items: flex-start; }
}