:root {
  --ivory: #f4efe5;
  --paper: #fffdf8;
  --ink: #221c17;
  --muted: #6f6357;
  --line: #ded2bf;
  --clay: #a94b25;
  --clay-soft: #f3e2d7;
  --green: #2f6b4f;
  --green-soft: #e2efe7;
  --amber: #7d5508;
  --amber-soft: #f7ecd2;
  --slate: #5a5f66;
  --slate-soft: #eceef0;
  --radius: 16px;
  --radius-control: 10px;
  --shadow: 0 14px 34px rgba(56, 38, 20, 0.07);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  background: var(--ivory);
  color: var(--ink);
  font-family: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

button,
select,
a {
  cursor: pointer;
}

:focus-visible {
  outline: 3px solid #8b5a20;
  outline-offset: 2px;
  border-radius: 4px;
}

button:disabled {
  cursor: not-allowed;
}

h1,
h2,
h3 {
  font-family: 'Fraunces', Georgia, serif;
  font-weight: 700;
  letter-spacing: -0.015em;
  margin: 0;
}

p {
  margin: 0;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* -------------------------------- topbar -------------------------------- */

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 18px clamp(20px, 5vw, 64px);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 253, 248, 0.72);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--clay);
  color: #fff8ef;
  font-family: 'Fraunces', serif;
  font-size: 24px;
  line-height: 1;
}

.brand h1 {
  font-size: 24px;
  line-height: 1.1;
}

.tagline {
  font-size: 12.5px;
  color: var(--muted);
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 14px;
}

.demo-note {
  font-size: 13px;
  color: var(--muted);
}

.back-link {
  font-size: 13px;
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.back-link:hover {
  color: var(--ink);
  border-color: var(--ink);
}

/* -------------------------------- intro -------------------------------- */

.intro {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(280px, 1fr);
  gap: 36px;
  align-items: end;
  padding: clamp(32px, 5vw, 64px) clamp(20px, 5vw, 64px) 28px;
}

.eyebrow {
  display: none;
}

.intro h2 {
  font-size: clamp(34px, 4.4vw, 58px);
  line-height: 1.02;
  max-width: 14ch;
}

.lede {
  margin-top: 16px;
  max-width: 58ch;
  color: var(--muted);
  font-size: 15.5px;
}

.lede strong {
  color: var(--ink);
}

.impact {
  display: grid;
  gap: 10px;
}

.intro > *,
.stage > * {
  min-width: 0;
}

.impact-card {
  min-width: 0;
  display: flex;
  align-items: baseline;
  gap: 12px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 12px 16px;
}

.impact-value {
  font-family: 'Fraunces', serif;
  font-size: 30px;
  line-height: 1;
  color: var(--clay);
  min-width: 52px;
}

.impact-label {
  font-size: 12.5px;
  color: var(--muted);
}

.impact-note {
  margin-top: 8px;
  font-size: 11.5px;
  color: var(--muted);
}

/* -------------------------------- stage -------------------------------- */

.stage {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(320px, 1fr);
  gap: 20px;
  padding: 0 clamp(20px, 5vw, 64px) 20px;
  align-items: start;
}

.panel {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  padding: 18px 20px 12px;
  border-bottom: 1px solid #efe6d7;
}

.panel-title {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.step {
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  border-radius: 7px;
  background: var(--clay-soft);
  color: var(--clay);
  font-size: 12px;
  font-weight: 700;
  flex: none;
  margin-top: 1px;
}

.reset {
  border: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  border-radius: var(--radius-control);
  padding: 0 12px;
  min-height: 44px;
  font: inherit;
  font-size: 12px;
}

.reset:hover {
  border-color: var(--clay);
  color: var(--clay);
}

.current-persona {
  padding: 10px 20px 0;
  font-size: 12.5px;
  color: var(--muted);
}

.scenarios-head {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 10px;
}

.scenarios-head .hint {
  margin-top: 1px;
}

.hint {
  font-size: 12px;
  color: var(--muted);
  margin-top: 2px;
}

/* personas */

.personas {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 14px 20px 4px;
}

.persona {
  border: 1px solid var(--line);
  background: #fffaf1;
  color: var(--ink);
  border-radius: var(--radius-control);
  padding: 9px 13px;
  min-height: 44px;
  font: inherit;
  font-size: 12.5px;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease, color 0.15s ease;
}

.persona:hover {
  border-color: var(--clay);
}

.persona[aria-pressed='true'] {
  background: var(--clay);
  border-color: var(--clay);
  color: #fff8ef;
}

.persona .persona-mode {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  color: var(--muted);
  margin-left: 6px;
}

.persona[aria-pressed='true'] .persona-mode {
  color: #ffe9dc;
}

/* scenarios */

.scenarios {
  padding: 12px 20px 16px;
  border-bottom: 1px solid #efe6d7;
}

.scenarios-label {
  font-size: 11.5px;
  font-weight: 600;
  color: var(--muted);
  display: block;
  margin-bottom: 8px;
}

.scenario-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.scenario {
  border: 1px solid #cbb99d;
  background: transparent;
  color: var(--muted);
  border-radius: 8px;
  padding: 8px 11px;
  min-height: 44px;
  font: inherit;
  font-size: 12px;
  cursor: pointer;
}

.scenario:hover {
  border-style: solid;
  border-color: var(--clay);
  color: var(--clay);
  background: #fff8ee;
}

/* chat */

.chat {
  height: min(46vh, 430px);
  overflow-y: auto;
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: #fbf7ef;
}

.chat-empty {
  margin: auto;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
  max-width: 34ch;
}

.bubble {
  max-width: 82%;
  padding: 10px 13px;
  border-radius: 14px;
  font-size: 14px;
  white-space: pre-wrap;
  word-break: break-word;
  border: 1px solid transparent;
}

.bubble.in {
  align-self: flex-start;
  background: #fff;
  border-color: #e8ddcb;
  border-bottom-left-radius: 5px;
}

.bubble.out {
  align-self: flex-end;
  background: var(--clay-soft);
  border-color: #e9c8b5;
  border-bottom-right-radius: 5px;
}

.bubble.system {
  align-self: center;
  background: var(--amber-soft);
  border-color: #e6d3a6;
  color: var(--amber);
  font-size: 12px;
  max-width: 92%;
  text-align: center;
}

.bubble .who {
  display: block;
  font-size: 10px;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 3px;
}

.bubble.typing {
  min-width: 64px;
  color: var(--muted);
}

/* composer */

.composer {
  display: flex;
  gap: 8px;
  padding: 14px 16px;
  border-top: 1px solid #efe6d7;
  background: #fffdf8;
}

.composer input {
  flex: 1;
  min-width: 0;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: var(--radius-control);
  padding: 12px 14px;
  min-height: 44px;
  font: inherit;
  font-size: 14px;
  color: var(--ink);
}

.composer input:focus {
  outline: 2px solid #dca887;
  outline-offset: 1px;
  border-color: var(--clay);
}

.composer select {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: var(--radius-control);
  padding: 0 10px;
  min-height: 44px;
  font: inherit;
  font-size: 12px;
  color: var(--ink);
}

.composer button {
  border: 0;
  background: var(--ink);
  color: #fff8ef;
  border-radius: var(--radius-control);
  padding: 0 20px;
  min-height: 44px;
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
}

.composer button:hover {
  background: var(--clay);
}

.composer button:disabled {
  opacity: 0.5;
  cursor: wait;
}

/* trace */

.trace-status {
  font-size: 11px;
  font-weight: 600;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 9px;
}

.trace-empty {
  padding: 26px 20px 30px;
  color: var(--muted);
  font-size: 13px;
}

.trace-empty-title {
  color: var(--ink);
  font-weight: 600;
  margin-bottom: 8px;
}

.trace-steps {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 6px;
}

.trace {
  padding: 16px 20px 20px;
}

.trace-action {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.action-pill {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 5px 10px;
  border-radius: 999px;
  border: 1px solid transparent;
}

.action-pill.auto {
  background: var(--green-soft);
  color: var(--green);
  border-color: #bcd8c7;
}

.action-pill.draft {
  background: var(--amber-soft);
  color: var(--amber);
  border-color: #e6d3a6;
}

.action-pill.ignore {
  background: var(--slate-soft);
  color: var(--slate);
  border-color: #d5d9dd;
}

.action-pill.error {
  background: #fbe3e0;
  color: #a33527;
  border-color: #efbdb7;
}

.trace-reason {
  font-size: 12.5px;
  color: var(--muted);
}

.trace-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: #efe6d7;
  border: 1px solid #efe6d7;
  border-radius: 12px;
  overflow: hidden;
  margin: 0 0 16px;
}

.trace-grid > div {
  background: #fffdf8;
  padding: 10px 12px;
  min-width: 0;
}

.trace-grid dt {
  font-size: 11px;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 3px;
}

.trace-grid dd {
  margin: 0;
  font-size: 13px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
}

.confidence-bar {
  display: inline-block;
  width: 62px;
  height: 5px;
  border-radius: 999px;
  background: #e9e0d2;
  overflow: hidden;
}

.confidence-bar span {
  display: block;
  height: 100%;
  width: 0%;
  background: var(--green);
  transition: width 0.35s ease;
}

.trace-block {
  margin-top: 14px;
}

.trace-label {
  display: block;
  font-size: 11.5px;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 6px;
}

.sources {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.source {
  font-size: 11.5px;
  background: #f1ece2;
  border: 1px solid #e2d7c3;
  border-radius: 7px;
  padding: 4px 8px;
  color: #5c5143;
}

.source b {
  font-family: 'JetBrains Mono', monospace;
  font-size: 9px;
  color: var(--clay);
  margin-right: 5px;
}

.source-empty {
  font-size: 12px;
  color: var(--muted);
}

.owner-reason {
  font-size: 12.5px;
  color: var(--amber);
  background: var(--amber-soft);
  border: 1px solid #e6d3a6;
  border-radius: 9px;
  padding: 9px 11px;
}

.legend {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 6px;
  font-size: 12px;
  color: var(--muted);
}

.legend li {
  display: flex;
  align-items: center;
  gap: 7px;
}

.legend strong {
  color: var(--ink);
  font-weight: 600;
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex: none;
}

.dot-auto {
  background: var(--green);
}
.dot-draft {
  background: var(--amber);
}
.dot-ignore {
  background: var(--slate);
}

/* footer */

.foot {
  padding: 6px clamp(20px, 5vw, 64px) 40px;
}

.foot p {
  font-size: 12px;
  color: var(--muted);
  max-width: 78ch;
}

/* ------------------------------- responsive ------------------------------ */

@media (min-width: 981px) {
  .trace-panel {
    position: sticky;
    top: 92px;
  }
}

@media (max-width: 980px) {
  .intro {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .impact {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .impact-card {
    flex-direction: column;
    gap: 4px;
    align-items: flex-start;
  }

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

  .chat {
    height: 44vh;
  }
}

@media (max-width: 600px) {
  .topbar {
    flex-wrap: wrap;
  }

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

  .impact-card {
    flex-direction: row;
    align-items: baseline;
    gap: 12px;
  }

  .impact-value {
    font-size: 24px;
  }

  .panel-head {
    flex-wrap: wrap;
  }

  .composer {
    flex-wrap: wrap;
  }

  .composer input {
    flex: 1 1 100%;
  }

  .composer select {
    flex: 1;
    padding: 10px;
  }

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

@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
  }
}