:root {
  --bg: #f4f6f8;
  --surface: #ffffff;
  --surface-raised: #fbfcfd;
  --surface-strong: #eef2f5;
  --ink: #12171c;
  --muted: #5f6b76;
  --subtle: #8b97a3;
  --border: #d7dee5;
  --border-strong: #b8c4cf;
  --focus: #0f766e;
  --focus-dark: #0b5f59;
  --focus-soft: rgba(15, 118, 110, 0.16);
  --danger: #b42318;
  --danger-soft: #fff1f0;
  --info: #1d5f99;
  --warning: #8a5b12;
  --success: #147a55;
  --neutral-line: #5f6b76;
  --teal: #167481;
  --shadow: 0 10px 26px rgba(18, 23, 28, 0.06);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--bg);
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(180deg, #e7edf2 0, rgba(231, 237, 242, 0) 320px),
    var(--bg);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.45;
}

.container {
  width: min(1520px, 100%);
  margin: 0 auto;
  padding: 18px;
  display: grid;
  gap: 16px;
}

.app-header {
  min-height: 96px;
  display: flex;
  justify-content: space-between;
  align-items: stretch;
  gap: 18px;
  padding: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.hero {
  min-width: 0;
  display: grid;
  align-content: center;
  gap: 4px;
  padding: 20px 22px;
  border-left: 5px solid var(--focus);
}

.eyebrow {
  margin: 0;
  color: var(--focus);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero h1,
.run-panel h2,
.controls h2,
.metrics h2,
.chart h2 {
  margin: 0;
  color: var(--ink);
  font-size: 1rem;
  font-weight: 760;
  letter-spacing: 0;
}

.hero h1 {
  font-size: 1.55rem;
}

.hero p,
.run-copy p,
.hint {
  margin: 0;
  color: var(--muted);
}

.github-cta {
  position: fixed;
  top: 0;
  right: 0;
  z-index: 20;
  width: 148px;
  height: 148px;
  display: inline-flex;
  flex-direction: column;
  align-items: flex-end;
  justify-content: center;
  gap: 3px;
  padding: 14px 14px 34px 34px;
  color: #ffffff;
  background: #141a20;
  border: 1px solid #10151a;
  border-top: 0;
  border-right: 0;
  border-bottom-left-radius: 148px;
  box-shadow: 0 14px 34px rgba(18, 23, 28, 0.18);
  font-size: 0.72rem;
  font-weight: 760;
  line-height: 1.1;
  text-align: right;
  text-decoration: none;
}

.github-cta svg {
  fill: currentColor;
  margin-bottom: 3px;
}

.github-cta:hover {
  background: #26313b;
}

.github-cta strong {
  font-size: 1rem;
  font-weight: 860;
}

.layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  align-items: start;
}

.sidebar,
.content {
  display: grid;
  gap: 12px;
  min-width: 0;
}

.sidebar {
  position: static;
  grid-template-columns: repeat(2, minmax(360px, 1fr));
  align-items: start;
}

.run-panel {
  grid-column: 1 / -1;
}

.panel,
.run-panel {
  min-width: 0;
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 1px 1px rgba(18, 23, 28, 0.03);
}

.panel {
  padding: 0;
}

.run-panel {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) minmax(280px, 1.2fr) minmax(220px, 300px);
  align-items: center;
  gap: 14px;
  padding: 16px;
  background: linear-gradient(180deg, #ffffff 0, #f8fbfa 100%);
  border-color: var(--border-strong);
}

.panel-heading {
  min-height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 16px;
  background: #ffffff;
  border-bottom: 1px solid var(--border);
}

.run-panel .panel-heading {
  min-height: auto;
  padding: 0;
  background: transparent;
  border-bottom: 0;
}

.panel-heading > div {
  min-width: 0;
  display: grid;
  gap: 2px;
}

.panel-badge,
.status-pill {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 3px 8px;
  color: #3b4854;
  background: var(--surface-strong);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.72rem;
  font-weight: 780;
  white-space: nowrap;
}

.status-pill {
  color: #0e5f45;
  background: #e8f5ef;
  border-color: #b9ddcf;
}

.run-copy {
  padding: 12px;
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.run-checklist {
  display: grid;
  gap: 6px;
  margin: 10px 0 0;
  padding: 0;
  list-style: none;
}

.run-checklist li {
  position: relative;
  min-height: 26px;
  display: flex;
  align-items: center;
  padding-left: 26px;
  color: #2f3b45;
  font-size: 0.8rem;
  font-weight: 750;
}

.run-checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 16px;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  background: #ffffff;
}

.run-checklist li[data-state="ok"]::before {
  border-color: #86c5ad;
  background: #e8f5ef;
  box-shadow: inset 0 0 0 4px #e8f5ef;
}

.run-checklist li[data-state="ok"]::after {
  content: "";
  position: absolute;
  left: 5px;
  width: 6px;
  height: 9px;
  border-right: 2px solid var(--success);
  border-bottom: 2px solid var(--success);
  transform: rotate(45deg);
}

.run-checklist li[data-state="dirty"] {
  color: #7a4c08;
}

.run-checklist li[data-state="dirty"]::before {
  border-color: #e0b561;
  background: #fff7e6;
}

.run-checklist li[data-state="dirty"]::after {
  content: "!";
  position: absolute;
  left: 5px;
  color: #8a5b12;
  font-size: 0.76rem;
  font-weight: 900;
}

.grid,
.compact-grid {
  display: grid;
  gap: 12px;
  padding: 16px;
}

.grid {
  grid-template-columns: 1fr 1fr;
}

.compact-grid {
  grid-template-columns: 1fr;
  padding-bottom: 0;
}

label {
  min-width: 0;
  position: relative;
  display: grid;
  gap: 6px;
  color: #2f3b45;
  font-size: 0.78rem;
  font-weight: 760;
}

label > span:first-child {
  padding-right: 28px;
}

.help-trigger {
  position: absolute;
  top: -2px;
  right: 0;
  width: 22px;
  height: 22px;
  min-height: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  color: #304f5c;
  background: #eef4f6;
  border: 1px solid #c8d5dc;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 850;
  line-height: 1;
}

.help-trigger:hover {
  color: #ffffff;
  background: #304f5c;
}

.help-popover {
  position: fixed;
  z-index: 40;
  width: min(340px, calc(100vw - 24px));
  padding: 14px;
  color: var(--ink);
  background: #ffffff;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  box-shadow: 0 18px 44px rgba(18, 23, 28, 0.18);
}

.help-popover strong {
  display: block;
  margin-bottom: 6px;
  font-size: 0.92rem;
}

.help-popover p {
  margin: 0;
  color: var(--muted);
  font-size: 0.84rem;
}

.help-visual {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  margin-top: 12px;
}

.help-visual span {
  min-height: 48px;
  display: grid;
  place-items: center;
  padding: 6px;
  color: #304f5c;
  background: #f3f7f8;
  border: 1px solid #d7e2e7;
  border-radius: var(--radius);
  font-size: 0.72rem;
  font-weight: 800;
  text-align: center;
}

.field-unit {
  color: var(--subtle);
  font-size: 0.72rem;
  font-weight: 650;
}

input,
select,
button {
  width: 100%;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  padding: 9px 10px;
  font: inherit;
  font-size: 0.92rem;
  background: #ffffff;
  color: var(--ink);
}

input,
select {
  min-height: 40px;
  box-shadow: inset 0 1px 1px rgba(18, 23, 28, 0.05);
}

input:hover,
select:hover {
  border-color: #8fa0af;
}

input:focus,
select:focus,
button:focus-visible,
.github-cta:focus-visible {
  outline: 3px solid var(--focus-soft);
  outline-offset: 2px;
  border-color: var(--focus);
}

button {
  border-color: transparent;
  background: var(--focus);
  color: #ffffff;
  font-weight: 780;
  cursor: pointer;
}

button:hover {
  background: var(--focus-dark);
}

.run-button {
  min-height: 50px;
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 0 14px;
  font-size: 1rem;
  box-shadow: 0 14px 28px rgba(15, 118, 110, 0.22);
}

.run-button span:last-child {
  width: auto;
  padding: 2px 6px;
  color: #d8f2ed;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 6px;
  font-size: 0.72rem;
}

.window-stack {
  display: grid;
  gap: 10px;
  padding: 16px;
  padding-top: 12px;
}

.window-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
}

.window-head strong {
  color: #2f3b45;
  font-size: 0.86rem;
}

#addWindowBtn {
  width: auto;
  min-height: 34px;
  padding: 7px 10px;
  background: #304f5c;
}

#addWindowBtn:hover {
  background: #263f49;
}

#windowRows {
  display: grid;
  gap: 8px;
}

.window-row {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 8px;
  align-items: end;
  padding: 10px;
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-left: 4px solid #304f5c;
  border-radius: var(--radius);
}

.window-algorithm {
  grid-column: 1 / -1;
  color: #304f5c;
  font-size: 0.74rem;
  font-weight: 820;
}

.algorithm-note {
  margin: 0 16px;
  padding: 10px 12px;
  color: #304f5c;
  background: #f3f7f8;
  border: 1px solid #cfdae0;
  border-radius: var(--radius);
  font-size: 0.82rem;
}

.window-row button {
  width: auto;
  min-width: 78px;
  height: 40px;
  background: var(--danger-soft);
  color: var(--danger);
  border-color: #f0bab6;
}

.window-row button:hover {
  background: #ffe2df;
}

.hint {
  padding: 0 16px 16px;
  font-size: 0.82rem;
}

.mini-chart {
  display: grid;
  gap: 8px;
  margin: 0 16px 16px;
  padding: 12px;
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.mini-chart > div {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  color: var(--muted);
  font-size: 0.76rem;
}

.mini-chart strong {
  color: #2f3b45;
}

.mini-chart canvas {
  height: 120px;
}

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 0;
  border-top: 1px solid var(--border);
}

.kpi {
  min-width: 0;
  padding: 15px;
  background: var(--surface);
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.kpi .name {
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 820;
  letter-spacing: 0;
  text-transform: uppercase;
}

.kpi .value {
  margin-top: 6px;
  color: var(--ink);
  font-size: 1.15rem;
  font-weight: 820;
  overflow-wrap: anywhere;
}

.kpi[data-kind="served"] {
  box-shadow: inset 4px 0 0 var(--success);
}

.kpi[data-kind="danger"] {
  box-shadow: inset 4px 0 0 var(--danger);
}

.kpi[data-kind="latency"] {
  box-shadow: inset 4px 0 0 var(--info);
}

.kpi[data-kind="queue"] {
  box-shadow: inset 4px 0 0 var(--warning);
}

.chart .panel-heading {
  border-bottom: 0;
}

.chart-frame {
  position: relative;
  padding: 0 16px 16px;
}

canvas {
  width: 100%;
  max-width: 100%;
  height: auto;
  display: block;
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.chart-tooltip {
  position: absolute;
  z-index: 5;
  min-width: 180px;
  max-width: 260px;
  padding: 10px;
  color: #ffffff;
  background: rgba(18, 23, 28, 0.94);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
  box-shadow: 0 14px 30px rgba(18, 23, 28, 0.24);
  font-size: 0.78rem;
  pointer-events: none;
}

.chart-tooltip strong {
  display: block;
  margin-bottom: 6px;
  font-size: 0.82rem;
}

.chart-tooltip div {
  display: flex;
  justify-content: space-between;
  gap: 16px;
}

.chart-tooltip span {
  color: #d7dee5;
}

.toggles {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 0 16px 12px;
}

.toggles label {
  width: auto;
  min-height: 32px;
  display: inline-flex;
  flex-direction: row;
  align-items: center;
  gap: 8px;
  padding: 5px 9px;
  color: #26323c;
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.78rem;
  font-weight: 760;
  box-shadow: 0 1px 1px rgba(18, 23, 28, 0.03);
}

.toggles label::before {
  content: "";
  width: 10px;
  height: 10px;
  background: var(--legend-color, #6b7280);
  border-radius: 3px;
}

.toggles input[type="checkbox"] {
  width: 14px;
  height: 14px;
  margin: 0;
  accent-color: var(--focus);
}

@media (max-width: 1200px) {
  .sidebar {
    grid-template-columns: 1fr;
  }

  .run-panel {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 900px) {
  .app-header {
    flex-direction: column;
    align-items: stretch;
  }

  .github-cta {
    width: 118px;
    height: 118px;
    padding: 10px 10px 26px 28px;
    border-bottom-left-radius: 118px;
    font-size: 0.66rem;
  }

  .github-cta strong {
    font-size: 0.9rem;
  }

  .layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    grid-template-columns: 1fr;
  }

  .grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .container {
    padding: 10px;
  }

  .hero {
    padding: 16px;
  }

  .panel-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .grid,
  .window-row {
    grid-template-columns: 1fr;
  }

  .panel-heading,
  .grid,
  .compact-grid,
  .window-stack,
  .chart-frame,
  .toggles,
  .mini-chart {
    padding-left: 12px;
    padding-right: 12px;
  }

  .run-panel {
    padding: 12px;
  }

  .window-row button,
  #addWindowBtn {
    width: 100%;
  }
}