:root {
  --blue: #2563eb;
  --blue-signal: #5ea7ff;
  --blue-deep: #0f2c6b;
  --abyss: #05070b;
  --surface: #0b0e14;
  --surface-raised: #10141c;
  --ice: #f4f6fa;
  --muted: #99a4b5;
  --line: rgba(160, 179, 211, 0.16);
  --line-bright: rgba(94, 167, 255, 0.38);
  --shadow: 0 34px 90px rgba(0, 0, 0, 0.42);
  --radius: 26px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Arial, sans-serif;
}

* { box-sizing: border-box; }

html {
  min-width: 320px;
  background: var(--abyss);
}

body {
  min-height: 100dvh;
  margin: 0;
  color: var(--ice);
  font-family: var(--font);
  background:
    radial-gradient(circle at 50% 8%, rgba(37, 99, 235, 0.14), transparent 30rem),
    radial-gradient(circle at 100% 70%, rgba(94, 167, 255, 0.06), transparent 28rem),
    var(--abyss);
  -webkit-font-smoothing: antialiased;
}

button,
input { font: inherit; }

button {
  color: inherit;
  -webkit-tap-highlight-color: transparent;
}

button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--blue-signal);
  outline-offset: 3px;
}

[hidden] { display: none !important; }

.app-shell {
  width: min(980px, calc(100% - 28px));
  margin: 0 auto;
  padding: max(28px, env(safe-area-inset-top)) 0 max(36px, env(safe-area-inset-bottom));
}

.card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(16, 20, 28, 0.96), rgba(8, 11, 16, 0.98));
  box-shadow: var(--shadow);
}

.gate {
  width: min(560px, 100%);
  margin: clamp(8vh, 12vh, 120px) auto 0;
  padding: clamp(28px, 6vw, 52px);
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #dfe5ef;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.brand-lockup strong { color: var(--blue-signal); }
.brand-lockup.compact { font-size: 12px; }
.brand-separator { color: #586477; }

.eyebrow {
  margin: 24px 0 8px;
  color: var(--blue-signal);
  font-size: 12px;
  font-weight: 760;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
p { margin-top: 0; }

h1 {
  margin-bottom: 16px;
  font-size: clamp(32px, 6vw, 54px);
  line-height: 1.02;
  letter-spacing: -0.045em;
}

h2 {
  margin-bottom: 0;
  font-size: 24px;
  letter-spacing: -0.03em;
}

.lede,
.stage-copy p,
.demo-footnote {
  color: var(--muted);
  line-height: 1.6;
}

.login-form { margin-top: 32px; }
.login-form label {
  display: block;
  margin-bottom: 9px;
  color: #c8d0dc;
  font-size: 13px;
  font-weight: 650;
}

.input-row,
.composer {
  display: flex;
  gap: 10px;
}

input {
  width: 100%;
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.045);
  color: var(--ice);
  padding: 14px 15px;
}

input::placeholder { color: #697486; }

.primary-button,
.talk-button,
.send-button,
.secondary-button,
.ghost-button,
.scenario-button {
  border: 0;
  border-radius: 14px;
  cursor: pointer;
  transition: transform 160ms ease, background 160ms ease, border-color 160ms ease, opacity 160ms ease;
}

.primary-button,
.talk-button,
.send-button {
  background: var(--ice);
  color: #070a0f;
  font-weight: 760;
}

.primary-button { padding: 0 20px; }
.primary-button:hover,
.talk-button:hover,
.send-button:hover { transform: translateY(-1px); }

.privacy-note {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  margin-top: 28px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  color: #7f8b9d;
  font-size: 12px;
  line-height: 1.5;
}

.status-dot {
  width: 7px;
  height: 7px;
  margin-top: 5px;
  flex: 0 0 auto;
  border-radius: 999px;
  background: #38d996;
  box-shadow: 0 0 14px rgba(56, 217, 150, 0.6);
}

.error-text {
  margin: 12px 0 0;
  color: #ff9a9a;
  font-size: 13px;
}

.demo-header {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: center;
  margin-bottom: 20px;
  padding: 2px 4px;
}

.demo-header .eyebrow { margin-top: 7px; margin-bottom: 0; }
.header-actions { display: flex; align-items: center; gap: 10px; }
.timer {
  color: #dce5f3;
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  font-weight: 700;
}

.ghost-button,
.secondary-button,
.scenario-button {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.035);
  color: #c8d0dc;
}

.ghost-button { padding: 9px 12px; font-size: 12px; }
.secondary-button { padding: 14px 18px; }
.secondary-button:disabled { cursor: not-allowed; opacity: 0.42; }

.voice-stage {
  min-height: 610px;
  padding: clamp(26px, 5vw, 48px);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.stage-copy { max-width: 650px; }
.stage-copy .eyebrow { margin-top: 0; }
.stage-copy h1 { font-size: clamp(30px, 5vw, 48px); margin-bottom: 12px; }
.stage-copy p { max-width: 580px; margin-inline: auto; }

.voice-orb {
  position: relative;
  width: clamp(170px, 29vw, 250px);
  aspect-ratio: 1;
  margin: clamp(28px, 5vw, 52px) auto 26px;
  display: grid;
  place-items: center;
  filter: drop-shadow(0 24px 55px rgba(37, 99, 235, 0.18));
}

.orb-core,
.orb-ring {
  position: absolute;
  border-radius: 50%;
}

.orb-core {
  inset: 16%;
  background:
    radial-gradient(circle at 35% 28%, rgba(255,255,255,0.82), transparent 7%),
    radial-gradient(circle at 42% 46%, rgba(94,167,255,0.85), rgba(23,61,130,0.55) 28%, rgba(7,11,18,0.85) 63%),
    radial-gradient(circle at 65% 68%, rgba(89,122,255,0.24), transparent 40%);
  border: 1px solid rgba(142, 193, 255, 0.3);
  box-shadow:
    inset 0 0 30px rgba(255,255,255,0.08),
    0 0 50px rgba(37,99,235,0.2);
  animation: orb-breathe 4.2s ease-in-out infinite;
}

.orb-ring {
  inset: 5%;
  border: 1px solid rgba(94,167,255,0.16);
  animation: ring-spin 12s linear infinite;
}

.orb-ring-two {
  inset: 0;
  border-style: dashed;
  border-color: rgba(94,167,255,0.1);
  animation-duration: 18s;
  animation-direction: reverse;
}

.voice-orb[data-state="connecting"] .orb-core,
.voice-orb[data-state="thinking"] .orb-core {
  animation-duration: 1.25s;
  box-shadow: inset 0 0 34px rgba(255,255,255,0.1), 0 0 70px rgba(37,99,235,0.38);
}

.voice-orb[data-state="listening"] .orb-core {
  animation: orb-listen 720ms ease-in-out infinite alternate;
}

.voice-orb[data-state="speaking"] .orb-core {
  animation: orb-speak 420ms ease-in-out infinite alternate;
}

.voice-status {
  min-height: 56px;
  display: grid;
  gap: 5px;
}

.voice-status strong { font-size: 17px; }
.voice-status span { color: var(--muted); font-size: 13px; }

.scenario-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 9px;
  margin-top: 24px;
}

.scenario-button { padding: 10px 13px; font-size: 12px; }
.scenario-button:hover { border-color: var(--line-bright); background: rgba(94,167,255,0.06); }

.main-controls {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 26px;
}

.talk-button {
  min-width: 190px;
  padding: 14px 20px;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
}

.mic-icon {
  color: var(--blue);
  font-size: 11px;
}

.conversation-panel {
  margin-top: 18px;
  padding: clamp(22px, 4vw, 34px);
}

.conversation-head {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 20px;
  margin-bottom: 20px;
}

.conversation-head .eyebrow { margin-top: 0; }
.transcript {
  min-height: 170px;
  max-height: 360px;
  overflow: auto;
  padding-right: 4px;
}

.empty-transcript { color: #697486; font-size: 13px; }
.turn {
  display: grid;
  gap: 5px;
  margin: 0 0 18px;
}
.turn-label {
  color: var(--blue-signal);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.turn-user .turn-label { color: #c1cad8; }
.turn-text { margin: 0; color: #e9eef6; line-height: 1.52; }
.turn-user .turn-text { color: #bcc6d4; }

.composer {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.send-button { padding: 0 18px; }
.demo-footnote { margin: 14px 4px 0; text-align: center; font-size: 11px; }

@keyframes orb-breathe {
  0%, 100% { transform: scale(0.98); }
  50% { transform: scale(1.025); }
}

@keyframes orb-listen {
  from { transform: scale(0.98); filter: saturate(1); }
  to { transform: scale(1.04); filter: saturate(1.25); }
}

@keyframes orb-speak {
  from { transform: scale(0.97); }
  to { transform: scale(1.055); }
}

@keyframes ring-spin {
  to { transform: rotate(360deg); }
}

@media (max-width: 640px) {
  .app-shell { width: min(100% - 18px, 980px); }
  .gate { margin-top: 6vh; padding: 26px 20px; }
  .input-row { flex-direction: column; }
  .primary-button { min-height: 48px; }
  .demo-header { align-items: flex-start; }
  .voice-stage { min-height: 570px; padding: 28px 18px; }
  .main-controls { width: 100%; }
  .talk-button { min-width: 0; flex: 1; }
  .conversation-panel { padding: 22px 18px; }
  .composer { gap: 8px; }
  .send-button { padding-inline: 14px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; }
}