:root {
  color-scheme: light dark;
  --bg: #f4f8ff;
  --surface: #ffffff;
  --surface-2: #eaf2ff;
  --ink: #071a35;
  --muted: #52657f;
  --line: #9db8d8;
  --accent: #0669f7;
  --accent-strong: #0348b8;
  --accent-soft: #dceaff;
  --success: #087a55;
  --warning: #9a5b00;
  --danger: #b42318;
  --shadow: 0 24px 64px rgba(8, 49, 106, 0.14);
  /* Inverted panel. A surface colour, so it must not follow --ink. */
  --panel-invert: #071a35;
  --panel-invert-ink: #ffffff;
  --panel-invert-muted: #c2d0e3;
  --panel-invert-accent: #8cc0ff;
  --radius-sm: 14px;
  --radius-md: 24px;
  --radius-lg: 36px;
  --space-1: 0.5rem;
  --space-2: 0.75rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2rem;
  --space-6: 3rem;
  --space-7: 5rem;
  --font-sans: "Hiragino Sans", "Yu Gothic UI", "Yu Gothic", system-ui, sans-serif;
  --text-xs: 0.78rem;
  --text-sm: 0.9rem;
  --text-md: 1rem;
  --text-lg: clamp(1.08rem, 1.8vw, 1.28rem);
  --text-xl: clamp(1.55rem, 4vw, 2.35rem);
  --text-2xl: clamp(2.7rem, 8vw, 6.7rem);
  --lh-tight: 1.05;
  --lh-body: 1.85;
  --dur-1: 160ms;
  --dur-2: 320ms;
  --dur-3: 720ms;
  --ease-out: cubic-bezier(0.2, 0.8, 0.2, 1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  background:
    radial-gradient(circle at 72% 12%, rgba(62, 145, 255, 0.2), transparent 34rem),
    linear-gradient(180deg, #f8fbff 0%, var(--bg) 58%, #edf4ff 100%);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: var(--text-md);
  line-height: var(--lh-body);
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.2em;
}

a:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 4px;
  border-radius: 4px;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 0.75rem;
  left: 0.75rem;
  padding: 0.65rem 1rem;
  border-radius: 999px;
  background: var(--panel-invert);
  color: var(--panel-invert-ink);
  transform: translateY(-160%);
}

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

.site-header {
  position: relative;
  z-index: 10;
  display: flex;
  width: min(1180px, calc(100% - 2rem));
  min-height: 76px;
  margin: 0 auto;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--ink);
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border-radius: 12px;
  background: var(--accent);
  box-shadow: 0 9px 24px rgba(6, 105, 247, 0.25);
  color: white;
}

.brand-mark svg {
  width: 25px;
  height: 25px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(0.8rem, 2.4vw, 1.8rem);
  color: var(--muted);
  font-size: var(--text-sm);
  font-weight: 700;
}

.site-nav a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

.site-nav a:hover {
  color: var(--accent-strong);
}

main {
  overflow: hidden;
}

.hero {
  position: relative;
  display: grid;
  width: min(1180px, calc(100% - 2rem));
  min-height: calc(100svh - 76px);
  margin: 0 auto;
  padding: var(--space-6) 0 var(--space-7);
  grid-template-columns: minmax(0, 1.12fr) minmax(300px, 0.88fr);
  align-items: center;
  gap: clamp(2rem, 7vw, 7rem);
}

.eyebrow {
  display: inline-flex;
  width: fit-content;
  align-items: center;
  gap: 0.55rem;
  margin: 0 0 var(--space-4);
  color: var(--accent-strong);
  font-size: var(--text-xs);
  font-weight: 800;
  letter-spacing: 0.14em;
}

.eyebrow::before {
  width: 28px;
  height: 2px;
  background: currentColor;
  content: "";
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 8.5ch;
  margin-bottom: var(--space-4);
  font-size: var(--text-2xl);
  font-weight: 850;
  letter-spacing: -0.065em;
  line-height: var(--lh-tight);
}

.hero-lead {
  max-width: 39rem;
  margin-bottom: var(--space-5);
  color: var(--muted);
  font-size: var(--text-lg);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.button {
  display: inline-flex;
  min-height: 52px;
  padding: 0.75rem 1.3rem;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 999px;
  font-weight: 800;
  text-decoration: none;
  transition: transform var(--dur-1) var(--ease-out), box-shadow var(--dur-1) var(--ease-out), background var(--dur-1) var(--ease-out);
}

.button-primary {
  background: var(--accent);
  box-shadow: 0 12px 30px rgba(6, 105, 247, 0.28);
  color: white;
}

.button-secondary {
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.68);
  color: var(--ink);
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary:hover {
  background: var(--accent-strong);
  box-shadow: 0 16px 36px rgba(6, 105, 247, 0.34);
}

.voice-stage {
  position: relative;
  display: grid;
  min-height: 510px;
  place-items: center;
  isolation: isolate;
}

.voice-stage::before,
.voice-stage::after {
  position: absolute;
  z-index: -1;
  width: min(31rem, 90vw);
  aspect-ratio: 1;
  border: 1px solid rgba(6, 105, 247, 0.14);
  border-radius: 50%;
  content: "";
  animation: breathe 4.4s var(--ease-out) infinite;
}

.voice-stage::after {
  width: min(24rem, 72vw);
  animation-delay: -2.2s;
}

.voice-orb {
  position: relative;
  display: grid;
  width: clamp(225px, 31vw, 350px);
  aspect-ratio: 1;
  place-items: center;
  overflow: hidden;
  border: 14px solid rgba(255, 255, 255, 0.84);
  border-radius: 50%;
  background:
    radial-gradient(circle at 35% 27%, #ffffff 0 5%, rgba(255, 255, 255, 0.4) 13%, transparent 30%),
    radial-gradient(circle at 56% 58%, #3f9cff, #0568f7 48%, #0344a8 100%);
  box-shadow: var(--shadow), inset -22px -30px 55px rgba(1, 35, 92, 0.25);
  color: white;
}

.voice-orb svg {
  width: 43%;
  filter: drop-shadow(0 10px 20px rgba(2, 38, 94, 0.24));
}

.status-pill {
  position: absolute;
  right: 0;
  bottom: 13%;
  display: flex;
  min-width: 210px;
  padding: 0.8rem 1rem;
  align-items: center;
  gap: 0.7rem;
  border: 1px solid rgba(255, 255, 255, 0.82);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.88);
  box-shadow: 0 16px 40px rgba(8, 49, 106, 0.16);
  backdrop-filter: blur(12px);
  color: var(--ink);
  font-size: var(--text-sm);
  font-weight: 800;
}

.status-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 0 6px rgba(8, 122, 85, 0.12);
}

.section {
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
  padding: var(--space-7) 0;
}

.section-heading {
  display: grid;
  margin-bottom: var(--space-6);
  grid-template-columns: minmax(0, 0.72fr) minmax(280px, 1.28fr);
  gap: var(--space-5);
  align-items: end;
}

.section-heading h2,
.prose-hero h1 {
  margin: 0;
  font-size: var(--text-xl);
  line-height: 1.25;
  letter-spacing: -0.035em;
}

.section-heading p {
  max-width: 50rem;
  margin: 0;
  color: var(--muted);
}

.feature-rail {
  display: grid;
  padding: 0 clamp(1.2rem, 3vw, 2.4rem);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
  box-shadow: 0 12px 32px rgba(8, 49, 106, 0.07);
}

.feature {
  display: grid;
  padding: clamp(1.4rem, 3vw, 2.3rem) 0;
  border-bottom: 1px solid var(--line);
  grid-template-columns: 5rem minmax(180px, 0.65fr) minmax(260px, 1.35fr);
  gap: var(--space-4);
  align-items: baseline;
}

.feature:last-child {
  border-bottom: 0;
}

.feature-number {
  color: var(--accent);
  font-weight: 850;
}

.feature h3 {
  margin: 0;
  font-size: var(--text-lg);
  line-height: 1.4;
}

.feature p {
  margin: 0;
  color: var(--muted);
}

.safety-panel {
  display: grid;
  padding: clamp(2rem, 6vw, 5rem);
  border-radius: var(--radius-lg);
  background: var(--panel-invert);
  box-shadow: var(--shadow);
  color: var(--panel-invert-ink);
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.78fr);
  gap: var(--space-6);
}

.safety-panel h2 {
  margin-bottom: var(--space-4);
  font-size: var(--text-xl);
  line-height: 1.25;
}

.safety-panel p {
  color: var(--panel-invert-muted);
}

/* The default eyebrow colour is tuned for the light page. On the dark panel it
   sat at 2.17:1, which is what made "SAFETY BY DESIGN" hard to read. */
.safety-panel .eyebrow {
  color: var(--panel-invert-accent);
}

.safety-list {
  display: grid;
  margin: 0;
  padding: 0;
  gap: var(--space-3);
  list-style: none;
}

.safety-list li {
  position: relative;
  padding: 1rem 1rem 1rem 3.3rem;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.05);
}

.safety-list li::before {
  position: absolute;
  top: 1rem;
  left: 1rem;
  display: grid;
  width: 1.5rem;
  height: 1.5rem;
  place-items: center;
  border-radius: 50%;
  background: var(--accent);
  content: "✓";
  font-size: 0.8rem;
  font-weight: 900;
}

.beta-note {
  display: flex;
  margin-top: var(--space-6);
  padding: var(--space-4);
  align-items: flex-start;
  gap: var(--space-3);
  border: 1px solid #f1c985;
  border-radius: var(--radius-sm);
  background: #fff7e8;
  color: #6c4300;
}

.beta-note strong {
  white-space: nowrap;
}

.site-footer {
  width: min(1180px, calc(100% - 2rem));
  margin: var(--space-7) auto 0;
  padding: var(--space-5) 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: var(--text-sm);
}

.footer-row {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.footer-links {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.prose-hero {
  width: min(820px, calc(100% - 2rem));
  margin: 0 auto;
  padding: var(--space-7) 0 var(--space-6);
}

.prose-hero .eyebrow {
  margin-bottom: var(--space-3);
}

.prose-hero h1 {
  max-width: none;
  font-size: clamp(2.2rem, 7vw, 4.5rem);
}

.prose-hero .lead {
  max-width: 42rem;
  margin-top: var(--space-4);
  color: var(--muted);
  font-size: var(--text-lg);
}

.prose {
  width: min(820px, calc(100% - 2rem));
  margin: 0 auto var(--space-7);
  padding: 0 clamp(1.2rem, 4vw, 2.6rem);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
  box-shadow: 0 12px 32px rgba(8, 49, 106, 0.07);
}

.prose section {
  padding: var(--space-5) 0;
  border-top: 1px solid var(--line);
}

.prose section:first-child,
.prose .faq-item:first-child {
  border-top: 0;
}

.prose h2 {
  margin-bottom: var(--space-3);
  font-size: clamp(1.28rem, 3vw, 1.7rem);
  line-height: 1.4;
}

.prose h3 {
  margin: var(--space-4) 0 var(--space-2);
  font-size: var(--text-lg);
}

.prose p,
.prose li {
  color: var(--muted);
}

.prose ul,
.prose ol {
  padding-left: 1.4rem;
}

.prose li + li {
  margin-top: 0.6rem;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.data-table th,
.data-table td {
  padding: 0.85rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.data-table th {
  color: var(--ink);
}

.faq-item {
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--line);
}

.faq-item h2 {
  margin-bottom: var(--space-2);
}

@keyframes breathe {
  0%, 100% { transform: scale(0.94); opacity: 0.46; }
  50% { transform: scale(1.03); opacity: 0.9; }
}

@media (max-width: 820px) {
  .site-header {
    min-height: 68px;
  }

  .site-nav a:not(:last-child) {
    display: none;
  }

  .hero {
    min-height: auto;
    padding-top: var(--space-5);
    grid-template-columns: 1fr;
  }

  .hero-copy {
    position: relative;
    z-index: 2;
  }

  h1 {
    max-width: 9ch;
  }

  .voice-stage {
    min-height: 390px;
  }

  .status-pill {
    right: 4%;
  }

  .section-heading,
  .safety-panel {
    grid-template-columns: 1fr;
  }

  .feature {
    grid-template-columns: 3.5rem 1fr;
  }

  .feature p {
    grid-column: 2;
  }
}

@media (max-width: 520px) {
  .hero-actions .button {
    width: 100%;
  }

  .voice-stage {
    min-height: 340px;
  }

  .status-pill {
    right: 0;
    bottom: 5%;
    min-width: 190px;
  }

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

  .feature p {
    grid-column: 1;
  }

  .data-table,
  .data-table tbody,
  .data-table tr,
  .data-table th,
  .data-table td {
    display: block;
  }

  .data-table tr {
    padding: var(--space-3) 0;
    border-bottom: 1px solid var(--line);
  }

  .data-table th,
  .data-table td {
    padding: 0.2rem 0;
    border: 0;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #061326;
    --surface: #0b1e38;
    --surface-2: #102b4d;
    --ink: #f3f7ff;
    --muted: #adc0da;
    --line: #31527a;
    --accent: #4598ff;
    --accent-strong: #7bb5ff;
    --accent-soft: #123a69;
    --success: #48d5a4;
    --shadow: 0 24px 64px rgba(0, 0, 0, 0.28);
    --panel-invert: #071a35;
    --panel-invert-ink: #ffffff;
    --panel-invert-muted: #c2d0e3;
    --panel-invert-accent: #8cc0ff;
  }

  body {
    background:
      radial-gradient(circle at 72% 12%, rgba(44, 126, 242, 0.2), transparent 34rem),
      linear-gradient(180deg, #07182d 0%, var(--bg) 58%, #081a31 100%);
  }

  .button-secondary,
  .status-pill {
    background: rgba(10, 30, 56, 0.86);
  }

  .voice-orb {
    border-color: rgba(18, 48, 83, 0.9);
  }

  .beta-note {
    border-color: #76551d;
    background: #2b210f;
    color: #f7d596;
  }
}

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