/* UtterAI — landing page. Shares the app's visual language:
   cool near-white / near-black, iris accent, Bricolage + Inter, one signature
   element (the speech ribbon). */

@font-face {
  font-family: "Bricolage Grotesque";
  src: url("./fonts/bricolage.woff2") format("woff2");
  font-weight: 200 800;
  font-display: swap;
}
@font-face {
  font-family: "InterVar";
  src: url("./fonts/inter.woff2") format("woff2");
  font-weight: 100 900;
  font-display: swap;
}
@font-face {
  font-family: "JetBrains Mono";
  src: url("./fonts/jetbrains-mono.woff2") format("woff2");
  font-weight: 400;
  font-display: swap;
}

:root {
  --bg: #f7f8fa;
  --surface: #ffffff;
  --surface-2: #f0f1f5;
  --border: #e2e4ea;
  --text: #16171b;
  --muted: #53565d;
  --faint: #64676f;
  --iris: #5b54e8;
  --iris-2: #8f8af2;
  --teal: #12a594;
  --shadow: 0 1px 2px rgb(16 17 27 / 0.04), 0 12px 32px -12px rgb(16 17 27 / 0.16);
  --shadow-lg: 0 2px 6px rgb(16 17 27 / 0.05), 0 40px 80px -24px rgb(16 17 27 / 0.28);
  --maxw: 1080px;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0c0d10;
    --surface: #151619;
    --surface-2: #1c1d22;
    --border: #2a2c34;
    --text: #e9eaee;
    --muted: #9194a0;
    --faint: #636570;
    --iris: #817afa;
    --iris-2: #5c55c8;
    --teal: #2dbeaa;
    --shadow: 0 1px 2px rgb(0 0 0 / 0.3), 0 12px 32px -12px rgb(0 0 0 / 0.5);
    --shadow-lg: 0 2px 6px rgb(0 0 0 / 0.4), 0 40px 80px -24px rgb(0 0 0 / 0.7);
  }
}

* {
  box-sizing: border-box;
  margin: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  background: var(--bg);
  color: var(--text);
  font-family: "InterVar", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-feature-settings: "cv05", "ss03";
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
}
h1,
h2,
h3 {
  font-family: "Bricolage Grotesque", "InterVar", sans-serif;
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 1.1;
  text-wrap: balance;
}
:focus-visible {
  outline: 2px solid var(--iris);
  outline-offset: 3px;
  border-radius: 4px;
}

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding-inline: 24px;
}
.eyebrow {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--iris);
}
.muted {
  color: var(--muted);
}

/* buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: 12px;
  font: inherit;
  font-weight: 550;
  font-size: 0.95rem;
  cursor: pointer;
  border: 1px solid transparent;
  transition:
    transform 0.14s ease,
    filter 0.14s ease,
    background 0.14s ease;
}
.btn-primary {
  background: var(--iris);
  color: #fff;
  box-shadow: var(--shadow);
}
.btn-primary:hover {
  filter: brightness(1.08);
  transform: translateY(-1px);
}
.btn-ghost {
  border-color: var(--border);
  background: var(--surface);
  color: var(--text);
}
.btn-ghost:hover {
  background: var(--surface-2);
}

/* nav */
header.nav {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(12px);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s;
}
header.nav.scrolled {
  border-color: var(--border);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: "Bricolage Grotesque", sans-serif;
  font-weight: 600;
  font-size: 1.05rem;
}
.brand .mark {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--iris);
  display: grid;
  place-items: center;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 0.9rem;
  color: var(--muted);
}
.nav-links a:hover {
  color: var(--text);
}
.nav-links .btn {
  padding: 9px 16px;
  font-size: 0.88rem;
}
.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 7px;
  color: var(--text);
  cursor: pointer;
}
@media (max-width: 760px) {
  .nav-toggle {
    display: inline-flex;
  }
  .nav-links {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 12px 24px 20px;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition:
      opacity 0.16s ease,
      transform 0.16s ease;
  }
  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .nav-links a:not(.btn) {
    padding: 10px 4px;
    font-size: 0.98rem;
    border-bottom: 1px solid var(--border);
  }
  .nav-links .btn {
    margin-top: 8px;
    justify-content: center;
  }
}

/* hero */
.hero {
  padding: 72px 0 48px;
  text-align: center;
}
.hero h1 {
  font-size: clamp(2.4rem, 6vw, 4rem);
  max-width: 16ch;
  margin: 18px auto 0;
}
.hero p.lede {
  font-size: clamp(1.05rem, 2.2vw, 1.25rem);
  color: var(--muted);
  max-width: 46ch;
  margin: 20px auto 0;
  text-wrap: pretty;
}
.hero-cta {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 32px;
}
.trust {
  margin-top: 18px;
  font-size: 0.85rem;
  color: var(--faint);
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}
.trust b {
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

/* ribbon */
.ribbon {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 3px;
  height: 56px;
  margin: 40px auto 0;
  max-width: 760px;
}
.ribbon span {
  width: 4px;
  border-radius: 2px;
  background: var(--border);
  transition: height 0.4s ease, background 0.4s ease;
}
.ribbon span.on {
  background: var(--iris);
}

/* window frame */
.frame {
  margin: 40px auto 0;
  max-width: 940px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}
.frame .bar {
  display: flex;
  gap: 6px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
}
.frame .bar i {
  width: 11px;
  height: 11px;
  border-radius: 999px;
  background: var(--border);
}
.frame picture {
  display: block;
  aspect-ratio: 1160 / 745;
}
.frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  display: block;
}

/* sections */
section {
  padding-block: 80px;
}
.section-head {
  max-width: 40ch;
  margin-bottom: 44px;
}
.section-head h2 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  margin-top: 12px;
}
.section-head p {
  margin-top: 14px;
  color: var(--muted);
  font-size: 1.05rem;
}

.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.pillar {
  padding: 26px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: var(--surface);
}
.pillar .ic {
  width: 40px;
  height: 40px;
  border-radius: 11px;
  background: color-mix(in srgb, var(--iris) 12%, transparent);
  color: var(--iris);
  display: grid;
  place-items: center;
  margin-bottom: 16px;
}
.pillar h3 {
  font-size: 1.15rem;
}
.pillar p {
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.95rem;
}

.steps {
  display: grid;
  gap: 28px;
}
.step {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: 40px;
  align-items: center;
}
.step:nth-child(even) .step-media {
  order: -1;
}
.step-num {
  font-family: "Bricolage Grotesque", sans-serif;
  font-size: 0.9rem;
  color: var(--iris);
  font-weight: 600;
}
.step h3 {
  font-size: 1.5rem;
  margin: 10px 0;
}
.step p {
  color: var(--muted);
}
.step-media {
  border-radius: 14px;
  border: 1px solid var(--border);
  overflow: hidden;
  background: var(--surface-2);
  box-shadow: var(--shadow);
  align-self: center;
  aspect-ratio: 1160 / 745;
}
.step-media img,
.step-media picture {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  display: block;
}

.formats {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.fmt {
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  font-size: 0.85rem;
  font-weight: 550;
  font-family: "JetBrains Mono", ui-monospace, monospace;
}
.sample {
  margin-top: 28px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--surface);
  padding: 22px;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.82rem;
  line-height: 1.9;
  color: var(--muted);
  overflow-x: auto;
}
.sample .ts {
  color: var(--iris);
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.feat {
  padding: 22px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--surface);
}
.feat h3 {
  font-size: 1.02rem;
  margin-bottom: 6px;
}
.feat p {
  font-size: 0.9rem;
  color: var(--muted);
}

/* download */
.dl {
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.dl-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.dl-card {
  padding: 28px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: var(--bg);
}
.dl-card h3 {
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  gap: 10px;
}
.dl-card .opts {
  margin-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.dl-card .opts a {
  display: flex;
  justify-content: space-between;
  padding: 11px 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface);
  font-size: 0.9rem;
  font-weight: 500;
}
.dl-card .opts a:hover {
  border-color: var(--iris);
}
.dl-card .opts a span {
  color: var(--faint);
  font-family: "JetBrains Mono", monospace;
  font-size: 0.8rem;
}
.dl-note {
  margin-top: 24px;
  font-size: 0.85rem;
  color: var(--faint);
  text-align: center;
}

/* faq */
.faq details {
  border-bottom: 1px solid var(--border);
  padding: 20px 0;
}
.faq summary {
  font-weight: 550;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.faq summary::-webkit-details-marker {
  display: none;
}
.faq summary::after {
  content: "+";
  color: var(--faint);
  font-size: 1.3rem;
}
.faq details[open] summary::after {
  content: "–";
}
.faq p {
  margin-top: 12px;
  color: var(--muted);
  max-width: 62ch;
}

footer {
  padding: 48px 0;
  text-align: center;
  color: var(--faint);
  font-size: 0.85rem;
}
footer a {
  color: var(--muted);
}
footer a:hover {
  color: var(--text);
}

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition:
    opacity 0.6s ease,
    transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}
.reveal.in,
.no-js .reveal {
  opacity: 1;
  transform: none;
}

@media (max-width: 860px) {
  .pillars,
  .grid,
  .dl-cards {
    grid-template-columns: 1fr;
  }
  .step {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .step:nth-child(even) .step-media {
    order: 0;
  }
  section {
    padding: 56px 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
    animation: none !important;
    scroll-behavior: auto !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}