:root {
  color-scheme: light;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #20252b;
  background: #f4f6f7;
  font-synthesis: none;
}

* { box-sizing: border-box; }

body { margin: 0; min-width: 320px; }

button, summary { font: inherit; }

button:focus-visible, summary:focus-visible {
  outline: 3px solid rgba(21, 101, 192, .25);
  outline-offset: 2px;
}

.app-header {
  min-height: 104px;
  padding: 24px clamp(20px, 5vw, 64px);
  background: #ffffff;
  border-bottom: 1px solid #d9dee3;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

h1, h2, p { margin: 0; }
h1 { font-size: 24px; line-height: 1.2; letter-spacing: 0; }
h2 { font-size: 18px; line-height: 1.3; letter-spacing: 0; }

.eyebrow {
  margin-bottom: 5px;
  color: #68717b;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
}

main { width: min(1040px, calc(100% - 40px)); margin: 28px auto 48px; }

.quick-guide {
  margin-bottom: 18px;
  overflow: hidden;
  background: #ffffff;
  border: 1px solid #d4dae0;
  border-radius: 6px;
}

.quick-guide summary {
  min-height: 48px;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  cursor: pointer;
  font-weight: 750;
  list-style: none;
}

.quick-guide summary::-webkit-details-marker { display: none; }
.quick-guide summary::before { content: "▸"; margin-right: -7px; color: #68717b; }
.quick-guide[open] summary::before { content: "▾"; }
.guide-summary { margin-left: auto; color: #68717b; font-size: 12px; font-weight: 500; }
.guide-content { padding: 0 18px 16px 42px; border-top: 1px solid #e4e8eb; }
.guide-content ol { margin: 14px 0 10px; padding-left: 20px; }
.guide-content li { margin: 7px 0; line-height: 1.55; }
.guide-note { color: #8a4b00; font-size: 13px; line-height: 1.5; }

.status {
  min-width: 88px;
  padding: 7px 10px;
  border: 1px solid;
  border-radius: 6px;
  text-align: center;
  font-size: 13px;
  font-weight: 700;
}

.status-offline { color: #616971; background: #f0f2f3; border-color: #cbd1d6; }
.status-connecting { color: #8a4b00; background: #fff5df; border-color: #e6b76a; }
.status-online { color: #176a3a; background: #e9f7ef; border-color: #7dc49b; }
.status-error { color: #a12222; background: #fff0f0; border-color: #df8f8f; }

.call-bar {
  min-height: 86px;
  padding: 16px 18px;
  background: #252b31;
  color: #ffffff;
  border-radius: 6px;
  display: grid;
  grid-template-columns: auto minmax(150px, 1fr) auto;
  align-items: center;
  gap: 24px;
}

.call-actions { display: flex; gap: 8px; }
button { border-radius: 5px; border: 1px solid transparent; cursor: pointer; }
button:disabled { opacity: .46; cursor: default; }
.primary { padding: 10px 15px; color: #ffffff; background: #16834b; font-weight: 700; }
.primary.is-active { background: #b43636; }
.secondary { padding: 10px 13px; color: #ffffff; background: #39414a; border-color: #59636d; }
.secondary.is-active { color: #2b2525; background: #ffc9c9; border-color: #e58f8f; }

.meter { min-width: 0; display: flex; align-items: center; gap: 10px; color: #c8cfd6; font-size: 12px; }
.meter-track { height: 8px; flex: 1; overflow: hidden; background: #444d56; border-radius: 4px; }
.meter-fill { width: 0; height: 100%; background: #54bd7d; transition: width 70ms linear; }

.runtime-status { margin: 0; display: flex; gap: 24px; }
.runtime-status div { min-width: 68px; }
.runtime-status dt { color: #9fa8b1; font-size: 10px; text-transform: uppercase; }
.runtime-status dd { margin: 3px 0 0; font-size: 13px; font-weight: 700; font-variant-numeric: tabular-nums; }

.conversation-section { margin-top: 22px; padding: 22px 0 10px; }
.section-heading { display: flex; justify-content: space-between; align-items: end; gap: 16px; padding: 0 2px 14px; border-bottom: 1px solid #cfd5da; }
.policy-label { color: #5e6871; font-size: 12px; }
.conversation { min-height: 260px; max-height: 440px; overflow-y: auto; padding: 18px 2px; }
.empty-state { color: #7a838b; font-size: 14px; }

.turn { display: grid; grid-template-columns: 92px minmax(0, 1fr); gap: 12px; padding: 12px 0; border-bottom: 1px solid #e0e4e7; }
.turn-role { padding-top: 2px; color: #68717b; font-size: 11px; font-weight: 800; text-transform: uppercase; }
.turn-user .turn-role { color: #1565c0; }
.turn-assistant .turn-role { color: #a45117; }
.turn-text { min-width: 0; white-space: pre-wrap; overflow-wrap: anywhere; line-height: 1.55; }
.turn-live .turn-text::after { content: ""; display: inline-block; width: 6px; height: 14px; margin-left: 4px; background: #9098a0; vertical-align: -2px; animation: blink 1s step-end infinite; }
@keyframes blink { 50% { opacity: 0; } }

.diagnostics { margin-top: 18px; border-top: 1px solid #bfc6cc; border-bottom: 1px solid #bfc6cc; background: #ffffff; }
.diagnostics summary { padding: 13px 14px; display: flex; justify-content: space-between; cursor: pointer; font-weight: 700; list-style: none; }
.diagnostics summary::-webkit-details-marker { display: none; }
.event-count { color: #6f7880; font-size: 12px; font-weight: 500; }
.log-toolbar { min-height: 40px; padding: 7px 12px; border-top: 1px solid #e0e4e7; display: flex; align-items: center; justify-content: space-between; gap: 12px; color: #69727a; font-size: 12px; }
.icon-button { padding: 5px 9px; color: #394149; background: #f4f6f7; border-color: #cdd3d8; }
.event-log { height: 200px; margin: 0; padding: 12px 14px; overflow: auto; background: #171b1f; color: #d9e0e6; font: 11px/1.55 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; white-space: pre-wrap; }
.log-error { color: #ff9f9f; }

@media (max-width: 760px) {
  .app-header { min-height: 88px; padding: 18px 20px; }
  h1 { font-size: 20px; }
  main { width: min(100% - 24px, 620px); margin-top: 16px; }
  .quick-guide summary { align-items: flex-start; }
  .guide-summary { max-width: 130px; text-align: right; }
  .guide-content { padding: 0 14px 14px 30px; }
  .call-bar { grid-template-columns: 1fr; gap: 15px; }
  .call-actions button { flex: 1; }
  .runtime-status { justify-content: space-between; gap: 10px; }
  .section-heading { align-items: start; flex-direction: column; gap: 7px; }
  .conversation { min-height: 230px; }
  .turn { grid-template-columns: 72px minmax(0, 1fr); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}