/* Murmur -- application chrome.
 *
 * A fixed left rail, a top bar over the working column, and content in cards.
 * Teal is spent only where a decision is: the primary button, the active nav
 * row, the brand tile, the score marker. Everything else is ink and grey.
 */

:root {
  --ink: #0f2b2e;
  --teal: #0d7a72;
  --teal-dark: #0a5f59;
  --teal-tint: #eaf4f2;
  --page: #f5f8f7;
  --card: #ffffff;
  --hair: #dfe6e5;
  --grey: #5c6b6c;
  --rail-w: 250px;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.55;
  overflow-x: hidden;
}

button { font: inherit; color: inherit; }

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 50;
  background: var(--ink);
  color: #fff;
  padding: 10px 14px;
}
.skip:focus { left: 8px; top: 8px; }

:focus-visible { outline: 2px solid var(--teal); outline-offset: 2px; }

/* ---- shell ------------------------------------------------------------- */

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

.rail {
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  width: var(--rail-w);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 24px;
  padding: 18px 14px 16px;
  background: var(--card);
  border-right: 1px solid var(--hair);
  overflow-y: auto;
  z-index: 10;
}

.main {
  flex: 1 1 auto;
  min-width: 0;
  margin-left: var(--rail-w);
  display: flex;
  flex-direction: column;
}

/* ---- rail -------------------------------------------------------------- */

.brand {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 4px 6px 0;
  margin-bottom: 16px;
}

.brand-tile {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 7px;
  background: var(--teal);
  color: #fff;
  flex: none;
}

.brand-name {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid var(--hair);
  background: var(--card);
  border-radius: 8px;
  padding: 9px 16px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  text-align: center;
}
.btn:hover { border-color: #c6d2d1; }
.btn[disabled] { opacity: 0.45; cursor: default; }

.btn-primary {
  background: var(--teal);
  border-color: var(--teal);
  color: #fff;
  font-weight: 600;
}
.btn-primary:hover { background: var(--teal-dark); border-color: var(--teal-dark); }
.btn-primary[disabled]:hover { background: var(--teal); border-color: var(--teal); }

.btn-rec { background: var(--ink); border-color: var(--ink); color: #fff; }
.btn-rec:hover { background: #0a2023; border-color: #0a2023; }

.rail-cta { width: 100%; padding: 10px 16px; }

.nav {
  display: flex;
  flex-direction: column;
  gap: 1px;
  margin-top: 18px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 11px;
  width: 100%;
  padding: 8px 10px;
  border: 0;
  border-radius: 7px;
  background: none;
  color: var(--ink);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  text-align: left;
}
.nav-item:hover { background: #f1f5f4; }
.nav-item .nav-ico { color: var(--grey); flex: none; }
.nav-item.is-on { background: var(--teal-tint); color: var(--teal-dark); }
.nav-item.is-on .nav-ico { color: var(--teal); }

.rail-foot { border-top: 1px solid var(--hair); padding: 14px 8px 0; }

.usage + .usage { margin-top: 12px; }

.usage-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: 12.5px;
  color: var(--grey);
}
.usage-row .num { font-family: var(--mono); font-size: 12px; color: var(--ink); }

.usage-bar {
  height: 3px;
  margin-top: 6px;
  border-radius: 2px;
  background: #eaefee;
  overflow: hidden;
}
.usage-bar span { display: block; height: 100%; background: var(--teal); }

.rail-note {
  margin: 14px 0 0;
  font-size: 11.5px;
  line-height: 1.5;
  color: var(--grey);
}

/* ---- top bar ----------------------------------------------------------- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 6;
  display: grid;
  grid-template-columns: 1fr minmax(0, 600px) 1fr;
  align-items: center;
  gap: 16px;
  padding: 11px 28px;
  background: var(--card);
  border-bottom: 1px solid var(--hair);
}

.topbar-field {
  grid-column: 2;
  display: flex;
  align-items: center;
  gap: 9px;
  min-width: 0;
  padding: 8px 14px;
  border: 1px solid var(--hair);
  border-radius: 9px;
  background: var(--page);
  color: var(--grey);
  font-size: 13.5px;
}
.topbar-field span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.topbar-field svg { flex: none; }

.topbar-acts {
  grid-column: 3;
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 18px;
}
.topbar-act { font-size: 13px; color: var(--grey); white-space: nowrap; }

/* ---- content ----------------------------------------------------------- */

.content {
  flex: 1 1 auto;
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 40px 28px 56px;
}

.page-head { max-width: 700px; margin: 0 auto 40px; text-align: center; }

.page-title {
  margin: 0;
  font-size: 34px;
  line-height: 1.18;
  font-weight: 600;
  letter-spacing: -0.022em;
}

.page-lede { margin: 14px 0 0; color: var(--grey); font-size: 14.5px; }

.sec { margin-bottom: 36px; }

.sec-h {
  margin: 0 0 4px;
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.sec-note { margin: 0 0 14px; color: var(--grey); font-size: 13.5px; max-width: 68ch; }

.boot {
  margin: 0 0 26px;
  padding: 10px 14px;
  border: 1px solid var(--hair);
  border-radius: 8px;
  background: var(--card);
  color: var(--grey);
  font-size: 13.5px;
}
.boot[hidden] { display: none; }

/* ---- cards ------------------------------------------------------------- */

.cardrow {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(196px, 1fr));
  gap: 12px;
}

.card {
  display: block;
  width: 100%;
  padding: 14px;
  border: 1px solid var(--hair);
  border-radius: 10px;
  background: var(--card);
  text-align: left;
}

button.card { cursor: pointer; font: inherit; color: inherit; }
button.card:hover { border-color: #bfcecd; }
button.card[disabled] { opacity: 0.5; cursor: default; }
button.card[disabled]:hover { border-color: var(--hair); }
button.card[aria-pressed="true"] { border-color: var(--teal); box-shadow: inset 0 0 0 1px var(--teal); }

.card-head { display: flex; align-items: flex-start; gap: 11px; }

.tile {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  flex: none;
  border-radius: 8px;
  background: var(--teal-tint);
  color: var(--teal);
}

.card-t { font-size: 14.5px; font-weight: 600; letter-spacing: -0.005em; }
.card-s { margin-top: 1px; font-size: 12.5px; color: var(--grey); }

.card-wide { max-width: 720px; }
.card-body { margin: 14px 0 0; font-size: 13.5px; color: var(--grey); }

.card-warn {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--hair);
  font-size: 12.5px;
  color: var(--grey);
}

.mic { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; margin-top: 14px; }
.mic-state { font-family: var(--mono); font-size: 12.5px; color: var(--grey); }

.meter {
  width: 100%;
  height: 4px;
  border-radius: 2px;
  background: #eaefee;
  overflow: hidden;
}
.meter[hidden] { display: none; }
.meter-fill { display: block; height: 100%; width: 0; background: var(--teal); }

/* ---- status ------------------------------------------------------------ */

.status, .error {
  margin: 0 0 20px;
  padding: 10px 14px;
  border: 1px solid var(--hair);
  border-radius: 8px;
  background: var(--card);
  font-size: 13.5px;
  color: var(--grey);
}
.status[hidden], .error[hidden] { display: none; }
.error { border-color: #d9b4b0; color: #8c2f26; background: #fdf4f3; }

/* ---- result panel ------------------------------------------------------ */

.result {
  border: 1px solid var(--hair);
  border-radius: 12px;
  background: var(--card);
  overflow: hidden;
}
.result[hidden] { display: none; }

.result-head { padding: 26px 26px 22px; border-bottom: 1px solid var(--hair); }

.result-src {
  margin: 0 0 8px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--grey);
}

.verdict {
  margin: 0;
  font-size: 25px;
  font-weight: 600;
  letter-spacing: -0.02em;
}
.verdict.is-refer { color: var(--teal-dark); }

.verdict-sub { margin: 8px 0 0; max-width: 72ch; color: var(--grey); font-size: 14px; }

.block { padding: 24px 26px; border-top: 1px solid var(--hair); }
.block:first-child { border-top: 0; }

.block-h {
  margin: 0 0 16px;
  font-size: 14px;
  font-weight: 600;
}

/* ---- score scale ------------------------------------------------------- */

.scale { position: relative; margin: 30px 0 0; }

.scale-top { position: relative; height: 40px; }

.scale-score {
  position: absolute;
  bottom: 0;
  white-space: nowrap;
  line-height: 1.25;
}
.scale-score b {
  display: block;
  font-family: var(--mono);
  font-size: 18px;
  font-weight: 500;
  color: var(--teal-dark);
}
.scale-score span { font-size: 11.5px; color: var(--grey); }

.scale-mark { position: relative; height: 7px; }
.scale-tri {
  position: absolute;
  bottom: 0;
  width: 0;
  height: 0;
  margin-left: -5px;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 6px solid var(--teal);
}

.scale-track {
  position: relative;
  height: 12px;
  border-radius: 6px;
  background: #eef2f1;
  border: 1px solid var(--hair);
}

.scale-over {
  position: absolute;
  top: 0;
  bottom: 0;
  right: 0;
  background: #d3e8e4;
  border-radius: 0 5px 5px 0;
}

.scale-thr {
  position: absolute;
  top: -4px;
  bottom: -4px;
  width: 1px;
  background: var(--ink);
}

.scale-pin {
  position: absolute;
  top: 50%;
  width: 12px;
  height: 12px;
  margin: -6px 0 0 -6px;
  border-radius: 50%;
  background: var(--teal);
  border: 2px solid var(--card);
}

.scale-ends {
  display: flex;
  justify-content: space-between;
  margin-top: 6px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--grey);
}

.scale-labels { position: relative; height: 34px; }

.scale-tag { position: absolute; top: 0; white-space: nowrap; line-height: 1.3; }
.scale-tag b {
  display: block;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
}
.scale-tag span { font-size: 11.5px; color: var(--grey); }

.scale-note {
  margin: 8px 0 0;
  max-width: 74ch;
  font-size: 13.5px;
  color: var(--grey);
}
.scale-gap { font-family: var(--mono); color: var(--ink); }

/* ---- segments ---------------------------------------------------------- */

.note { margin: 0 0 16px; max-width: 74ch; font-size: 13.5px; color: var(--grey); }

.segs {
  position: relative;
  display: flex;
  align-items: flex-end;
  gap: 10px;
  height: 140px;
  margin-top: 22px;
  padding: 0 2px;
  border-bottom: 1px solid var(--hair);
}

.seg-thr {
  position: absolute;
  left: 0;
  right: 0;
  height: 0;
  border-top: 1px dashed #9fb0b0;
  pointer-events: none;
}
.seg-thr-tag {
  position: absolute;
  right: 0;
  top: -15px;
  font-family: var(--mono);
  font-size: 10px;
  color: var(--grey);
  background: var(--card);
  padding: 0 3px;
}

.seg {
  position: relative;
  flex: 1 1 0;
  max-width: 88px;
  height: 100%;
  display: flex;
  align-items: flex-end;
  padding: 0;
  border: 0;
  background: none;
  cursor: pointer;
}

.seg-bar {
  display: block;
  width: 100%;
  background: #cbd8d7;
  border-radius: 3px 3px 0 0;
}
.seg:hover .seg-bar { background: #b3c4c3; }
.seg.is-top .seg-bar { background: var(--teal); }
.seg[aria-pressed="true"] .seg-bar { outline: 2px solid var(--ink); outline-offset: -2px; }

.seg-axis {
  display: flex;
  gap: 10px;
  padding: 0 2px;
  margin-top: 6px;
}
.seg-axis span {
  flex: 1 1 0;
  max-width: 88px;
  text-align: center;
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--grey);
}
.seg-axis span.is-sel { color: var(--ink); }

.seg-pick {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 18px;
  padding: 12px 14px;
  border: 1px solid var(--hair);
  border-radius: 9px;
  background: var(--page);
}

.seg-facts { font-size: 13px; color: var(--grey); }
.seg-facts b {
  display: block;
  font-family: var(--mono);
  font-size: 12.5px;
  font-weight: 500;
  color: var(--ink);
  white-space: pre;
}

/* ---- reference annotation ---------------------------------------------- */

.truth-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 8px;
  margin: 0 0 16px;
}
.truth-cell {
  padding: 11px 13px;
  border: 1px solid var(--hair);
  border-radius: 8px;
  background: var(--card);
}
.truth-cell dt { font-size: 11.5px; color: var(--grey); }
.truth-cell dd {
  margin: 2px 0 0;
  font-family: var(--mono);
  font-size: 13px;
}

.truth-call {
  margin: 0;
  padding: 13px 15px;
  border: 1px solid var(--hair);
  border-left: 3px solid var(--grey);
  border-radius: 0 9px 9px 0;
  background: var(--page);
  font-size: 13.5px;
  color: var(--grey);
  max-width: 80ch;
}
.truth-call b { color: var(--ink); }
.truth-call.call-hit { border-left-color: var(--teal); }
.truth-call.call-miss { border-left-color: #8c2f26; }
.truth-call.call-over { border-left-color: #9a6b1f; }

/* ---- how it works ------------------------------------------------------ */

.panel {
  max-width: 860px;
  padding: 20px 22px;
  border: 1px solid var(--hair);
  border-radius: 10px;
  background: var(--card);
}

.stages { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; max-width: 880px; }

.stage {
  display: flex;
  gap: 16px;
  padding: 18px 20px;
  border: 1px solid var(--hair);
  border-radius: 10px;
  background: var(--card);
}

.stage-n {
  flex: none;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--teal);
  padding-top: 2px;
}

.stage-t { font-size: 14.5px; font-weight: 600; }
.stage-d { margin-top: 5px; font-size: 13.5px; color: var(--grey); max-width: 72ch; }
.stage-k {
  margin-top: 8px;
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--grey);
}

.figures {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 12px;
  margin: 0;
}
.figures > div {
  padding: 16px 18px;
  border: 1px solid var(--hair);
  border-radius: 10px;
  background: var(--card);
}
.figures dt { font-size: 12.5px; color: var(--grey); }
.figures dd {
  margin: 6px 0 0;
  font-family: var(--mono);
  font-size: 24px;
  line-height: 1.1;
}
.fig-sub {
  display: block;
  margin-top: 6px;
  font-family: var(--sans);
  font-size: 12px;
  color: var(--grey);
}

.prose { margin: 0 0 14px; font-size: 14px; max-width: 78ch; }
.prose:last-child { margin-bottom: 0; }

.cite {
  margin: 0 0 12px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--grey);
  max-width: 88ch;
}
.cite:last-child { margin-bottom: 0; }

.bullets { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; max-width: 880px; }
.bullets li {
  padding: 16px 18px;
  border: 1px solid var(--hair);
  border-radius: 10px;
  background: var(--card);
  font-size: 13.5px;
  color: var(--grey);
  max-width: 82ch;
}
.bullets strong { color: var(--ink); }

/* ---- footer ------------------------------------------------------------ */

.foot {
  margin-top: 48px;
  padding-top: 18px;
  border-top: 1px solid var(--hair);
  font-size: 12.5px;
  color: var(--grey);
}
.foot p { margin: 0 0 4px; }
.foot-dim { color: #8b9797; }

/* ---- narrow ------------------------------------------------------------ */

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

  .rail {
    position: static;
    width: auto;
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    gap: 16px;
    flex-wrap: wrap;
    padding: 12px 18px;
    border-right: 0;
    border-bottom: 1px solid var(--hair);
    overflow: visible;
  }

  .rail-top {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
    flex: 1 1 auto;
    min-width: 0;
  }

  .brand { margin: 0; padding: 0; }
  .rail-cta { width: auto; }
  .nav { flex-direction: row; margin: 0; gap: 2px; flex-wrap: wrap; }

  .rail-foot {
    display: flex;
    align-items: center;
    gap: 20px;
    border-top: 0;
    padding: 0;
  }
  .usage + .usage { margin-top: 0; }
  .usage { min-width: 104px; }
  .rail-note { display: none; }

  .main { margin-left: 0; }
  .topbar { padding: 10px 18px; grid-template-columns: minmax(0, 1fr) auto; }
  .topbar-field { grid-column: 1; }
  .topbar-acts { grid-column: 2; }
  .content { padding: 30px 18px 44px; }
  .page-title { font-size: 28px; }
}

@media (max-width: 640px) {
  .topbar { grid-template-columns: minmax(0, 1fr); }
  .topbar-acts { grid-column: 1; justify-self: start; gap: 14px; }
  .topbar-act { font-size: 12px; }
  .rail-foot { display: none; }
  .content { padding: 24px 16px 40px; }
  .page-title { font-size: 24px; }
  .verdict { font-size: 21px; }
  .result-head { padding: 20px 16px 18px; }
  .block { padding: 20px 16px; }
  .cardrow { grid-template-columns: 1fr; }
  .seg-facts b { white-space: normal; }
}