/* Hallmark · genre: modern-minimal editorial · macrostructure: Workbench · theme: custom warm paper · enrichment: none · nav: N9 · footer: Ft2 */
/* Hallmark · pre-emit critique: P5 H5 E4 S5 R5 V4 */
:root {
  --color-paper: oklch(96.5% 0.014 82);
  --color-paper-soft: oklch(93.5% 0.016 82);
  --color-ink: oklch(19% 0.016 68);
  --color-ink-soft: oklch(33% 0.014 68);
  --color-muted: oklch(44% 0.012 72);
  --color-rule: oklch(78% 0.014 80);
  --color-rule-strong: oklch(55% 0.014 76);
  --color-accent: oklch(52% 0.16 35);
  --color-accent-ink: oklch(96.5% 0.014 82);
  --color-success: oklch(48% 0.10 145);
  --color-danger: oklch(48% 0.15 30);
  --color-focus: oklch(50% 0.18 35);

  --font-display: "Songti SC", "STSong", "Noto Serif CJK SC", serif;
  --font-body: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Microsoft YaHei", sans-serif;

  --text-display: clamp(3.25rem, 10vw, 6.75rem);
  --text-title: clamp(1.5rem, 4vw, 2rem);
  --text-body: clamp(0.9375rem, 2vw, 1.0625rem);
  --text-label: 0.8125rem;
  --text-caption: 0.75rem;

  --space-3xs: 0.125rem;
  --space-2xs: 0.25rem;
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2.5rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;
  --space-4xl: 9rem;

  --rule-hairline: 1px;
  --rule-control: 1px;
  --radius-control: 0.375rem;
  --radius-round: 999px;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in: cubic-bezier(0.7, 0, 0.84, 0);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --dur-micro: 120ms;
  --dur-short: 220ms;
  --dur-long: 420ms;

  --z-base: 1;
  --z-raised: 10;
}

* { box-sizing: border-box; }

html {
  min-width: 20rem;
  overflow-x: clip;
  color-scheme: light;
  background: var(--color-paper);
}

body {
  min-width: 20rem;
  min-height: 100vh;
  min-height: 100svh;
  min-height: 100dvh;
  margin: 0;
  overflow-x: clip;
  color: var(--color-ink);
  background: var(--color-paper);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

button,
input { font: inherit; }

button,
a { -webkit-tap-highlight-color: transparent; }

button,
a,
input { touch-action: manipulation; }

button:focus-visible,
input:focus-visible,
a:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: var(--space-2xs);
}

.skip-link {
  position: fixed;
  top: var(--space-md);
  left: var(--space-md);
  z-index: var(--z-raised);
  padding: var(--space-sm) var(--space-md);
  color: var(--color-paper);
  background: var(--color-ink);
  transform: translateY(calc(-100% - var(--space-xl)));
  transition: transform var(--dur-micro) var(--ease-out);
}

.skip-link:focus { transform: translateY(0); }

.page {
  width: min(64rem, 100%);
  min-height: 100vh;
  min-height: 100svh;
  min-height: 100dvh;
  margin-inline: auto;
  padding: max(var(--space-md), env(safe-area-inset-top)) max(var(--space-md), env(safe-area-inset-right)) max(var(--space-lg), env(safe-area-inset-bottom)) max(var(--space-md), env(safe-area-inset-left));
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: var(--space-xl);
}

.masthead {
  min-height: 2.75rem;
  padding-bottom: var(--space-sm);
  border-bottom: var(--rule-hairline) solid var(--color-rule);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

.wordmark {
  min-height: 2.75rem;
  color: var(--color-ink);
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--text-label);
  font-weight: 650;
  letter-spacing: 0.08em;
  text-decoration: none;
  white-space: nowrap;
}

.wordmark-mark {
  color: var(--color-accent);
  font-family: var(--font-display);
  font-size: 1rem;
  letter-spacing: -0.05em;
}

.disclosure {
  margin: 0;
  color: var(--color-muted);
  font-size: var(--text-caption);
  line-height: 1.5;
  text-align: right;
}

.disclosure span {
  color: var(--color-accent);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.workbench {
  width: min(48rem, 100%);
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.intro {
  max-width: 42rem;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--text-display);
  font-weight: 500;
  letter-spacing: -0.065em;
  line-height: 0.93;
  text-wrap: balance;
}

.lead {
  max-width: 36rem;
  margin: 0;
  color: var(--color-ink-soft);
  font-size: var(--text-body);
  line-height: 1.75;
}

.studio {
  min-width: 0;
  padding-block: var(--space-md) var(--space-lg);
  border-top: var(--rule-hairline) solid var(--color-ink);
  border-bottom: var(--rule-hairline) solid var(--color-rule);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.studio-head {
  min-height: 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

.status {
  color: var(--color-ink-soft);
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--text-label);
}

.status-dot {
  width: 0.5rem;
  height: 0.5rem;
  flex: 0 0 auto;
  border: var(--rule-hairline) solid var(--color-rule-strong);
  border-radius: var(--radius-round);
  background: transparent;
}

.status-dot[data-state="connecting"],
.status-dot[data-state="thinking"] {
  border-color: var(--color-accent);
  background: var(--color-accent);
  animation: status-breathe 1.2s var(--ease-in-out) infinite;
}

.status-dot[data-state="listening"],
.status-dot[data-state="speaking"] {
  border-color: var(--color-success);
  background: var(--color-success);
}

.status-dot[data-state="error"] {
  border-color: var(--color-danger);
  background: var(--color-danger);
}

.timer {
  color: var(--color-muted);
  font-size: var(--text-caption);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.08em;
}

.voice-stage {
  min-height: 4.5rem;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: var(--space-md);
}

.voice-rule {
  height: var(--rule-hairline);
  background: var(--color-rule);
}

.wave {
  height: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2xs);
}

.wave i {
  width: 0.125rem;
  height: 1rem;
  border-radius: var(--radius-round);
  background: var(--color-rule-strong);
  opacity: 0.7;
  transform: scaleY(var(--level, 0.45));
  transition: transform 80ms linear, opacity var(--dur-micro) var(--ease-out);
}

.wave.active i {
  background: var(--color-accent);
  opacity: 1;
}

.wave i:nth-child(2),
.wave i:nth-child(8) { height: 1.5rem; }

.wave i:nth-child(3),
.wave i:nth-child(7) { height: 2rem; }

.wave i:nth-child(4),
.wave i:nth-child(6) { height: 2.5rem; }

.wave i:nth-child(5) { height: 2.75rem; }

.transcript {
  min-height: 3.5rem;
  color: var(--color-ink);
  display: grid;
  place-items: center start;
  font-family: var(--font-display);
  font-size: var(--text-title);
  line-height: 1.45;
  overflow-wrap: anywhere;
}

.transcript.placeholder {
  color: var(--color-muted);
  font-family: var(--font-body);
  font-size: var(--text-label);
}

.access {
  display: none;
  grid-template-columns: minmax(6rem, 0.28fr) 1fr;
  align-items: center;
  gap: var(--space-md);
}

.access.visible { display: grid; }

.access label {
  color: var(--color-ink-soft);
  font-size: var(--text-label);
}

.access label span { color: var(--color-muted); }

.access input {
  width: 100%;
  min-height: 2.75rem;
  padding: var(--space-sm) var(--space-md);
  border: var(--rule-control) solid var(--color-rule-strong);
  border-radius: var(--radius-control);
  color: var(--color-ink);
  background: var(--color-paper);
}

.access input:hover { border-color: var(--color-ink-soft); }
.access input:focus { border-color: var(--color-accent); }
.access input:disabled { color: var(--color-muted); background: var(--color-paper-soft); cursor: not-allowed; }
.access input::placeholder { color: var(--color-muted); opacity: 1; }

.control {
  width: 100%;
  min-height: 3.25rem;
  padding: var(--space-sm) var(--space-lg);
  border: var(--rule-control) solid var(--color-ink);
  border-radius: var(--radius-control);
  color: var(--color-paper);
  background: var(--color-ink);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  font-weight: 650;
  letter-spacing: 0.04em;
  white-space: nowrap;
  transition: transform var(--dur-micro) var(--ease-out);
}

.control:hover { background: var(--color-ink-soft); }
.control:active { transform: translateY(1px); }
.control.connected { color: var(--color-ink); background: transparent; }
.control.connected:hover { color: var(--color-accent); border-color: var(--color-accent); }
.control:disabled { color: var(--color-paper-soft); background: var(--color-muted); border-color: var(--color-muted); cursor: wait; }

.mic-icon {
  width: 1.125rem;
  height: 1.125rem;
  flex: 0 0 auto;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
}

.privacy {
  margin: 0;
  color: var(--color-muted);
  font-size: var(--text-caption);
  line-height: 1.6;
  text-align: center;
}

.prompt-list {
  display: grid;
  grid-template-columns: minmax(9rem, 0.34fr) 1fr;
  gap: var(--space-xl);
}

.prompt-heading h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--text-title);
  font-weight: 500;
  letter-spacing: -0.03em;
}

.prompt-heading p {
  margin: var(--space-xs) 0 0;
  color: var(--color-muted);
  font-size: var(--text-caption);
  line-height: 1.6;
}

.topics { border-top: var(--rule-hairline) solid var(--color-rule); }

.topic {
  width: 100%;
  min-height: 3rem;
  padding: var(--space-sm) 0;
  border: 0;
  border-bottom: var(--rule-hairline) solid var(--color-rule);
  border-radius: 0;
  color: var(--color-ink-soft);
  background: transparent;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  text-align: left;
}

.topic span:first-child {
  overflow-wrap: anywhere;
  transition: transform var(--dur-short) var(--ease-out);
}
.topic span:last-child { color: var(--color-muted); font-size: var(--text-caption); font-variant-numeric: tabular-nums; }
.topic:hover { color: var(--color-accent); }
.topic:hover span:first-child { transform: translateX(var(--space-xs)); }
.topic:active { color: var(--color-ink); }
.topic[aria-pressed="true"] { color: var(--color-accent); }
.topic[aria-pressed="true"] span:last-child { color: var(--color-accent); }
.topic:disabled { color: var(--color-muted); cursor: not-allowed; }

footer {
  padding-top: var(--space-md);
  border-top: var(--rule-hairline) solid var(--color-rule);
  color: var(--color-muted);
  display: flex;
  justify-content: space-between;
  gap: var(--space-md);
  font-size: var(--text-caption);
  line-height: 1.6;
}

footer span:last-child { text-align: right; }

@keyframes status-breathe {
  50% { opacity: 0.35; }
}

@media (min-width: 48rem) {
  .page { padding-inline: max(var(--space-xl), env(safe-area-inset-left)); }
  .intro { margin-left: -6rem; }
  .studio { padding-inline: var(--space-lg); }
}

@media (max-width: 35rem) {
  .page { gap: var(--space-lg); }
  .workbench { gap: var(--space-lg); }
  .masthead { align-items: flex-start; }
  .disclosure { max-width: 9.5rem; }
  h1 { font-size: clamp(3.25rem, 17vw, 4.5rem); }
  .lead { line-height: 1.65; }
  .studio { gap: var(--space-sm); }
  .voice-stage { min-height: 3.5rem; }
  .transcript { min-height: 3rem; }
  .access { grid-template-columns: 1fr; gap: var(--space-xs); }
  .prompt-list { grid-template-columns: 1fr; gap: var(--space-md); }
  footer { flex-direction: column; gap: var(--space-2xs); }
  footer span:last-child { text-align: left; }
}

@media (max-width: 22rem) {
  .page { padding-inline: max(var(--space-sm), env(safe-area-inset-left)); }
  .disclosure { max-width: 8.5rem; }
  .wordmark { gap: var(--space-xs); }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 150ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 150ms !important;
  }
}