:root {
  --paper: #f7f5ef;
  --card: #fffef9;
  --ink: #172019;
  --muted: #6b726c;
  --line: #d8d6cc;
  --line-soft: #ebe9e0;
  --green: #1f6a39;
  --green-dark: #18592f;
  --green-soft: #e7f1e8;
  --red: #9d332c;
  --red-soft: #f6e9e7;
  --amber: #8a671d;
  --amber-soft: #fff8dd;
  --code: #1d241f;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.45;
}
button, input, select, textarea { font: inherit; }
button { color: inherit; }

.topbar {
  height: 66px;
  padding: 0 28px;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(247,245,239,.95);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--ink);
  text-decoration: none;
  font: 700 18px Georgia, serif;
}
.topbar-right { display: flex; align-items: center; gap: 18px; }
.topbar-right > a { color: var(--ink); font-size: 13px; }
.origin-state {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 9px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--card);
  color: #636b64;
  font-size: 12px;
}
.origin-state i { width: 7px; height: 7px; border-radius: 50%; background: #9aa09a; }
.origin-state i.up { background: #1ba63f; }

.page { width: min(1240px, calc(100% - 40px)); margin: 0 auto; padding: 42px 0 70px; }
.page-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 30px;
  margin-bottom: 24px;
}
.eyebrow, .label {
  color: var(--green);
  text-transform: uppercase;
  letter-spacing: .09em;
  font: 700 10px ui-monospace, SFMono-Regular, Menlo, monospace;
}
h1 { margin: 6px 0 8px; font: 700 clamp(34px, 5vw, 50px)/1.05 Georgia, serif; letter-spacing: -.025em; }
.page-heading p:last-child { max-width: 700px; color: var(--muted); margin: 0; }
.origin-note {
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--card);
  color: var(--muted);
  font-size: 11px;
  text-align: right;
}
.origin-note strong { color: var(--ink); font: 600 11px ui-monospace, monospace; }

.card { border: 1px solid var(--line); border-radius: 9px; background: var(--card); overflow: hidden; }
.card-head {
  min-height: 70px;
  padding: 15px 18px;
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.card-head h2 { margin: 4px 0 0; font-size: 17px; }
.text-button, .copy, .tab {
  border: 0;
  background: transparent;
  color: #687069;
  cursor: pointer;
}
.text-button:hover, .copy:hover { color: var(--ink); }

.lab-grid {
  display: grid;
  grid-template-columns: 205px minmax(310px, .9fr) minmax(390px, 1.1fr);
  gap: 14px;
  align-items: start;
}

.experiment-nav { overflow: visible; }
.nav-head { padding: 17px 16px 13px; border-bottom: 1px solid var(--line); }
.nav-head p { margin: 5px 0 0; color: var(--muted); font-size: 11px; }
.nav-group { padding: 12px 8px 5px; }
.nav-group + .nav-group { border-top: 1px solid var(--line-soft); }
.nav-group-last { padding-bottom: 12px; }
.nav-group h2 {
  margin: 0 8px 5px;
  color: #858b86;
  font-size: 9px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .1em;
}
.experiment-link {
  width: 100%;
  padding: 8px 9px;
  border: 0;
  border-radius: 5px;
  background: transparent;
  text-align: left;
  color: #4f5851;
  font-size: 12px;
  cursor: pointer;
}
.experiment-link:hover { background: #f5f3ec; color: var(--ink); }
.experiment-link.active { background: var(--green-soft); color: var(--green-dark); font-weight: 700; }

.experiment-card { min-height: 590px; }
.experiment-content { padding: 18px; }
.experiment-description { min-height: 42px; margin: 0 0 18px; color: var(--muted); font-size: 13px; }
.field { margin-top: 14px; }
.field:first-child { margin-top: 0; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 9px; }
.field label, .field-label {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 6px;
  font-size: 11px;
  font-weight: 750;
}
.field label span, .field-label span { color: var(--muted); font-weight: 400; }
select, input, textarea {
  width: 100%;
  color: var(--ink);
  background: #fbfaf5;
  border: 1px solid #cfcdc3;
  border-radius: 6px;
  font: 12px ui-monospace, SFMono-Regular, Menlo, monospace;
  outline: none;
}
select, input { height: 40px; padding: 0 10px; }
textarea { min-height: 100px; padding: 10px; resize: vertical; line-height: 1.55; }
select:focus, input:focus, textarea:focus { border-color: #71927a; box-shadow: 0 0 0 3px rgba(31,106,57,.08); }

.button-row { display: flex; gap: 8px; margin-top: 16px; flex-wrap: wrap; }
.primary, .secondary, .mini-button {
  min-height: 40px;
  border-radius: 6px;
  padding: 0 13px;
  font-weight: 750;
  cursor: pointer;
}
.primary { border: 1px solid var(--green); background: var(--green); color: white; }
.primary:hover { background: var(--green-dark); }
.secondary { border: 1px solid #c9c7bd; background: #fbfaf5; color: var(--ink); }
.secondary:hover { border-color: #a8aaa3; }
.mini-button { min-height: 30px; padding: 0 9px; border: 1px solid #d2d0c7; background: #fbfaf5; font-size: 10px; }
.preset-buttons { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 7px; }

.watch-box {
  margin-top: 18px;
  padding: 11px 12px;
  border-left: 3px solid #a9c3ae;
  background: #f5f7f2;
}
.watch-box strong { display: block; font-size: 11px; }
.watch-box p { margin: 4px 0 0; color: #5f6861; font-size: 11px; }
.request-preview {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--line-soft);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.request-preview span { display: block; margin-bottom: 3px; color: var(--muted); font-size: 9px; text-transform: uppercase; letter-spacing: .08em; }
.request-preview code { color: #39423b; font: 10px/1.5 ui-monospace, monospace; overflow-wrap: anywhere; }

.run-summary {
  margin-top: 14px;
  border: 1px solid var(--line);
  border-radius: 7px;
  overflow: hidden;
  background: #fbfaf5;
}
.summary-title { padding: 9px 10px; border-bottom: 1px solid var(--line); font-size: 10px; font-weight: 800; text-transform: uppercase; letter-spacing: .07em; }
.summary-row {
  display: grid;
  grid-template-columns: 42px 56px 62px 1fr;
  gap: 7px;
  padding: 7px 10px;
  border-bottom: 1px solid var(--line-soft);
  align-items: center;
  font: 10px ui-monospace, monospace;
}
.summary-row:last-child { border-bottom: 0; }
.summary-row .good { color: var(--green); }
.summary-row .bad { color: var(--red); }
.summary-note { padding: 9px 10px; color: var(--muted); font-size: 10px; }

.response-status { padding: 7px 9px; border-radius: 6px; color: #6c746d; font: 700 12px ui-monospace, monospace; }
.response-status.good { color: var(--green); background: var(--green-soft); }
.response-status.bad { color: var(--red); background: var(--red-soft); }
.response-status.redirect { color: var(--amber); background: var(--amber-soft); }
.metrics { display: grid; grid-template-columns: repeat(3, 1fr); border-bottom: 1px solid var(--line); }
.metrics div { padding: 12px 16px; border-right: 1px solid var(--line); }
.metrics div:last-child { border-right: 0; }
.metrics span { display: block; margin-bottom: 4px; color: var(--muted); font-size: 10px; text-transform: uppercase; letter-spacing: .08em; }
.metrics strong { font: 600 11px ui-monospace, monospace; overflow-wrap: anywhere; }
.tabs { height: 42px; padding: 0 14px; display: flex; align-items: end; gap: 8px; border-bottom: 1px solid var(--line); }
.tab { height: 100%; padding: 0 8px; border-bottom: 2px solid transparent; font-size: 12px; }
.tab.active { color: var(--ink); border-bottom-color: var(--green); }
.output-wrap { position: relative; }
.output-wrap pre {
  margin: 0;
  min-height: 370px;
  max-height: 470px;
  padding: 18px;
  overflow: auto;
  background: var(--code);
  color: #edf1ed;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  font: 12px/1.65 ui-monospace, SFMono-Regular, Menlo, monospace;
}
.copy {
  position: absolute;
  top: 9px;
  right: 9px;
  color: #d3dad4;
  border: 1px solid #485149;
  border-radius: 5px;
  padding: 5px 8px;
  background: #272f29;
  font-size: 10px;
}
.notice { margin: 12px; padding: 10px 12px; border: 1px solid #ddcd9a; border-radius: 6px; background: var(--amber-soft); color: var(--amber); font-size: 11px; }

.history-card { margin-top: 14px; }
.history { min-height: 78px; }
.history-row {
  width: 100%;
  display: grid;
  grid-template-columns: 78px 90px 55px 1fr 60px 66px;
  gap: 9px;
  align-items: center;
  padding: 10px 18px;
  border: 0;
  border-bottom: 1px solid var(--line-soft);
  background: transparent;
  text-align: left;
  font-size: 11px;
  cursor: pointer;
}
.history-row:hover { background: #faf9f4; }
.history-row:last-child { border-bottom: 0; }
.history-row code { min-width: 0; overflow: hidden; white-space: nowrap; text-overflow: ellipsis; color: #465049; background: transparent; padding: 0; }
.history-row .good { color: var(--green); }
.history-row .bad { color: var(--red); }
.history-row .redirect { color: var(--amber); }
.empty { padding: 18px; color: var(--muted); font-size: 12px; }

.header-editor { margin-top: 8px; }
.header-row { display: grid; grid-template-columns: 1fr 1fr 28px; gap: 6px; margin-bottom: 6px; }
.header-row input { height: 34px; }
.remove-header { border: 0; background: transparent; color: #8b514b; cursor: pointer; }
.browser-note { margin: 7px 0 0; color: var(--muted); font-size: 10px; }
.inline-check { display: flex; align-items: center; gap: 7px; margin-top: 10px; color: #515a53; font-size: 11px; }
.inline-check input { width: auto; height: auto; }

footer {
  width: min(1240px, calc(100% - 40px));
  margin: 0 auto;
  min-height: 80px;
  border-top: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--muted);
  font-size: 12px;
}

@media (max-width: 1080px) {
  .lab-grid { grid-template-columns: 190px 1fr; }
  .response-card { grid-column: 2; }
  .experiment-card { min-height: auto; }
}
@media (max-width: 760px) {
  .page { width: min(100% - 24px, 1240px); padding-top: 30px; }
  .topbar { padding: 0 14px; }
  .origin-state { display: none; }
  .page-heading { align-items: flex-start; flex-direction: column; }
  .origin-note { text-align: left; }
  .lab-grid { grid-template-columns: 1fr; }
  .experiment-nav, .experiment-card, .response-card { grid-column: 1; }
  .experiment-nav { display: grid; grid-template-columns: 1fr 1fr; }
  .nav-head { grid-column: 1 / -1; }
  .nav-group + .nav-group { border-top: 0; }
  .nav-group { border-top: 1px solid var(--line-soft) !important; }
  .metrics { grid-template-columns: 1fr; }
  .metrics div { border-right: 0; border-bottom: 1px solid var(--line); }
  .history-row { grid-template-columns: 62px 55px 1fr 48px; }
  .history-row span:nth-child(2), .history-row span:last-child { display: none; }
  footer { width: min(100% - 24px, 1240px); flex-direction: column; align-items: flex-start; justify-content: center; gap: 4px; }
}
@media (max-width: 480px) {
  .experiment-nav { grid-template-columns: 1fr; }
  .nav-head { grid-column: 1; }
  .field-row { grid-template-columns: 1fr; }
}

/* Playground v3 additions */
.history-actions { display: flex; align-items: center; gap: 10px; }
.history-compare {
  border-top: 1px solid var(--line);
  padding: 14px 18px 18px;
  background: #fbfaf5;
}
.compare-title {
  margin-bottom: 10px;
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .08em;
}
.compare-grid {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr) minmax(0, 1fr);
  gap: 7px 12px;
  align-items: start;
  font-size: 11px;
}
.compare-grid + .compare-grid { margin-top: 7px; }
.compare-grid-head { color: var(--muted); font-size: 10px; }
.compare-grid code, .compare-header-row code { overflow-wrap: anywhere; color: #465049; }
.compare-grid .good, .compare-header-row .good { color: var(--green); }
.compare-grid .bad, .compare-header-row .bad { color: var(--red); }
.compare-grid .redirect, .compare-header-row .redirect { color: var(--amber); }
.compare-header-head, .compare-header-row {
  display: grid;
  grid-template-columns: 170px minmax(0, 1fr) minmax(0, 1fr);
  gap: 10px;
  padding: 8px 0;
  border-top: 1px solid var(--line-soft);
  font-size: 10px;
}
.compare-header-head {
  margin-top: 12px;
  color: var(--muted);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
}
.compare-header-row span { overflow-wrap: anywhere; font: 10px/1.45 ui-monospace, monospace; }
.compare-no-change { margin: 8px 0 0; color: var(--muted); font-size: 11px; }
.ws-state {
  margin-top: 14px;
  padding: 9px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  display: flex;
  justify-content: space-between;
  background: #fbfaf5;
  font-size: 11px;
}
.ws-state span { color: var(--muted); }
.ws-log {
  margin: 8px 0 0;
  min-height: 150px;
  max-height: 230px;
  padding: 11px;
  overflow: auto;
  border-radius: 6px;
  background: var(--code);
  color: #edf1ed;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  font: 10px/1.55 ui-monospace, monospace;
}
button:disabled { cursor: not-allowed; opacity: .5; }

@media (max-width: 760px) {
  .compare-grid, .compare-header-head, .compare-header-row { grid-template-columns: 76px 1fr 1fr; }
  .history-actions { gap: 4px; }
}