/* SmarType website. Brand colours from design/ (Ink, Porcelain, Graphite, the brand gradient). Light and dark follow
   the system setting. The phone mockups use the keyboard's SmarType Day and Night themes (design/src/spec.css). */
:root {
  --bg: #F5FAFB; --surface: #FFFFFF; --surface-2: #E8F3F5; --on: #08323B; --on-2: #4C6066; --line: #D3E4E8;
  --accent: #0B727B; --grad: linear-gradient(120deg, #1257A8, #0E8DA6 55%, #119A76);
  --ai: linear-gradient(135deg, #2AA8E0, #4BDCA4);
  --r-sm: 12px; --r-md: 16px; --r-lg: 24px; --r-xl: 32px;
  --elev-1: 0 1px 2px rgba(8,50,59,.06), 0 6px 18px rgba(8,50,59,.06);
  --elev-2: 0 2px 4px rgba(8,50,59,.06), 0 18px 40px rgba(8,50,59,.12);
  --edge: color-mix(in srgb, var(--line) 70%, transparent);
  --kb-bg: #edf2f4; --kb-key: #ffffff; --kb-key-var: #e0e9ed; --kb-on: #171c1f; --kb-on-var: #414a4f; --kb-primary: #126577;
  --kb-on-primary: #ffffff; --kb-line: #414a4f33; --host-bg: #f7f9f9; --host-bubble: #e7ecec; --host-field: #ffffff;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0B1416; --surface: #122024; --surface-2: #1A2C31; --on: #E6F1F3; --on-2: #A9BEC3; --line: #23363A;
    --accent: #5FD3DF; --grad: linear-gradient(120deg, #2AA8E0, #4BDCA4);
    --elev-1: 0 1px 0 rgba(255,255,255,.04) inset, 0 8px 22px rgba(0,0,0,.35);
    --elev-2: 0 1px 0 rgba(255,255,255,.06) inset, 0 22px 48px rgba(0,0,0,.5);
    --kb-bg: #0d1114; --kb-key: #222c32; --kb-key-var: #2f3d45; --kb-on: #e3e7ea; --kb-on-var: #bec8cd; --kb-primary: #86d1df;
    --kb-on-primary: #073640; --kb-line: #bec8cd40; --host-bg: #101415; --host-bubble: #1d2426; --host-field: #1d2426;
    color-scheme: dark; }
}
* { box-sizing: border-box; }
html, body { overflow-x: clip; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }
body { margin: 0; background: var(--bg); color: var(--on); font: 400 17px/1.6 "Google Sans Flex", "DM Sans", system-ui, sans-serif; }
a { color: var(--accent); }
img { max-width: 100%; height: auto; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 max(20px, env(safe-area-inset-left, 0px)); }
.skip { position: absolute; left: -999px; z-index: 99; } .skip:focus { left: 12px; top: 12px; background: var(--surface); padding: 8px 12px; border-radius: 8px; }
.ic { width: 24px; height: 24px; flex: 0 0 auto; } .ic.sm { width: 18px; height: 18px; vertical-align: -3px; }
em { font-style: normal; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
h1, h2, h3 { line-height: 1.08; letter-spacing: -.02em; text-wrap: balance; margin: 0; }
h1 { font-size: clamp(42px, 7vw, 76px); font-weight: 700; }
h2 { font-size: clamp(30px, 4.4vw, 46px); font-weight: 700; margin-bottom: 18px; }
h3 { font-size: 20px; font-weight: 600; letter-spacing: -.01em; }
.lede { font-size: clamp(18px, 2vw, 21px); color: var(--on-2); max-width: 60ch; margin: 18px 0 0; }

/* ---------- header: one floating pill ----------
   Logo, links and the Play button in one capsule. The section you are in gets a soft pill that slides between the
   links (site.js), the same shape as the keyboard's chips. On phones the links move into a Menu sheet. */
main { padding-top: 68px; }
.top { position: fixed; inset: 0 0 auto; z-index: 30; padding: 12px 12px 0; pointer-events: none; }
.top-pill { pointer-events: auto; position: relative; margin: 0 auto; width: fit-content; max-width: 100%; height: 56px; display: flex; align-items: center; gap: 22px;
  padding: 0 8px 0 18px; border-radius: 999px; background: color-mix(in srgb, var(--surface) 78%, transparent);
  -webkit-backdrop-filter: blur(16px) saturate(1.5); backdrop-filter: blur(16px) saturate(1.5); border: 1px solid var(--edge); box-shadow: var(--elev-1);
  transition: background .3s, box-shadow .3s; }
html.scrolled .top-pill { background: color-mix(in srgb, var(--surface) 90%, transparent); box-shadow: var(--elev-2); }
.brand img { display: block; height: 28px; width: auto; }
.top-nav { position: relative; display: flex; gap: 2px; }
.top-nav a { position: relative; z-index: 1; padding: 8px 14px; border-radius: 999px; color: var(--on-2); text-decoration: none; font-weight: 500; font-size: 15px; white-space: nowrap; transition: color .2s; }
.top-nav a:hover, .top-nav a.on, .top-nav a[aria-current] { color: var(--on); }
.nav-hl { position: absolute; z-index: 0; left: 0; top: 0; height: 100%; width: 0; border-radius: 999px; background: var(--surface-2); opacity: 0;
  transition: transform .45s cubic-bezier(.3,1.25,.5,1), width .45s cubic-bezier(.3,1.25,.5,1), opacity .25s; }
.menu-btn { display: none; }
.menu { display: none; }
@media (max-width: 860px) {
  main { padding-top: 64px; }
  .top-nav, .top-pill > .btn { display: none; }
  .top-pill { width: 100%; height: 52px; justify-content: space-between; padding: 0 6px 0 16px; }
  .brand img { height: 26px; }
  .menu-btn { display: inline-flex; align-items: center; height: 40px; padding: 0 18px; border: 0; border-radius: 999px; background: var(--surface-2); color: var(--on);
    font: inherit; font-size: 15px; font-weight: 600; cursor: pointer; }
  .menu:not([hidden]) { pointer-events: auto; display: grid; gap: 2px; margin-top: 8px; padding: 8px; border-radius: var(--r-lg); background: var(--surface);
    border: 1px solid var(--edge); box-shadow: var(--elev-2); animation: menu-in .22s ease-out; }
  .menu a { padding: 12px 14px; border-radius: 14px; color: var(--on); text-decoration: none; font-weight: 600; font-size: 17px; }
  .menu a.on, .menu a[aria-current] { background: var(--surface-2); }
  .menu .btn { margin: 6px 4px 4px; justify-content: center; }
}
@keyframes menu-in { from { opacity: 0; transform: translateY(-6px); } }

/* footer */
.foot { border-top: 1px solid var(--line); margin-top: 40px; padding: 40px 0 48px; color: var(--on-2); font-size: 15px; }
.foot-in { display: grid; grid-template-columns: 1fr auto; gap: 18px 40px; align-items: start; }
.foot img { display: block; height: 26px; width: auto; } .foot p { margin: 10px 0 0; max-width: 40ch; }
.foot nav { display: flex; flex-wrap: wrap; gap: 10px 22px; } .foot nav a { color: var(--on-2); text-decoration: none; } .foot nav a:hover { color: var(--on); }
.copy { grid-column: 1 / -1; font-size: 13px; }

/* buttons: one style everywhere, flat. Primary: the AI gradient, left to right. Alt: an outline on the page. */
.cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.btn { display: inline-flex; align-items: center; gap: 10px; min-height: 52px; padding: 0 24px; border-radius: var(--r-md); font-weight: 600; font-size: 16px; text-decoration: none; }
.btn.key { color: #08323B; cursor: default; background: linear-gradient(90deg, #2AA8E0, #22C3CF 50%, #4BDCA4); transition: filter .2s ease, box-shadow .2s ease, border-color .2s ease; }
.btn.key.alt { background: transparent; color: var(--on); border: 1.5px solid var(--line); }
a.btn.key { cursor: pointer; }
.btn.key:hover { filter: brightness(1.08) saturate(1.1); box-shadow: 0 6px 20px color-mix(in srgb, #22C3CF 35%, transparent); }
.btn.key.alt:hover { border-color: var(--accent); filter: none; box-shadow: none; }
.play-chip { display: grid; place-items: center; width: 30px; height: 30px; margin-left: -8px; border-radius: 9px; background: #fff; box-shadow: 0 1px 2px rgba(8,50,59,.2); }
.play { width: 18px; height: 18px; display: block; }
.btn.key.sm { min-height: 40px; padding: 0 16px 0 6px; gap: 8px; font-size: 14px; border-radius: 999px; }
.btn.key.sm .play-chip { width: 28px; height: 28px; margin-left: 0; border-radius: 50%; } .btn.key.sm .play { width: 15px; height: 15px; }

/* documents */
.doc { max-width: 760px; padding-top: 48px; padding-bottom: 24px; }
.doc h1 { font-size: clamp(36px, 5vw, 52px); }
.doc h2 { font-size: 24px; margin: 36px 0 8px; }
.doc .meta { color: var(--on-2); font-size: 14px; margin: 10px 0 0; }
.doc p, .doc li { color: var(--on-2); } .doc li { margin: 6px 0; }
.toc { margin: 24px 0 8px; padding: 16px 20px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--r-lg); }
.toc ol { margin: 0; padding-left: 20px; columns: 2; } .toc a { text-decoration: none; }
details { border-bottom: 1px solid var(--line); padding: 14px 0; }
summary { cursor: pointer; font-weight: 600; font-size: 18px; color: var(--on); }
details p { margin: 10px 0 2px; }
.contact { text-align: center; } .contact .art img { width: 200px; margin: 0 auto 8px; display: block; } .contact .lede { margin-left: auto; margin-right: auto; }
@media (max-width: 560px) { .foot-in { grid-template-columns: 1fr; } .toc ol { columns: 1; } }

/* ---------- home (motion in home.js) ---------- */
.kicker { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; font-weight: 600; letter-spacing: .12em; text-transform: uppercase; color: var(--accent); margin: 0 0 14px; }
.kicker::before { content: ""; display: inline-block; width: 6px; height: 6px; border-radius: 50%; background: #22C3CF; box-shadow: 0 0 8px #22C3CF; }
.caret { display: inline-block; width: 2px; height: 1em; margin-left: 2px; vertical-align: -.12em; background: currentColor; animation: blink 1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }
/* A demo's caret shows only while its section is the one in the middle of the screen: one blinking caret at a time. */
html.motion section:not(.is-focus) .dc { visibility: hidden; }
[data-type] { position: relative; }
.tw-src { opacity: .13; } .tw-out { position: absolute; inset: 0; }
.tw-out .caret { background: #22C3CF; margin: 0 -1px; } .tw-rest { visibility: hidden; }
html.motion [data-reveal] { opacity: 0; transform: translateY(16px); }
.glow { position: absolute; border-radius: 50%; pointer-events: none; will-change: transform; }
.story, .tone, .stack, .closing2 { position: relative; }
.story > .wrap, .tone > .wrap, .stack > .wrap, .closing2 > .wrap { position: relative; z-index: 1; }

/* hero: the promise, the button and one picture */
.hero2 { position: relative; padding: clamp(28px, 5vw, 64px) 0 clamp(48px, 7vw, 96px); }
.g1 { width: 680px; height: 680px; right: -140px; top: -120px; background: radial-gradient(circle, color-mix(in srgb, #22C3CF 30%, transparent), transparent 68%); }
.hero2-in { position: relative; display: grid; grid-template-columns: 1.05fr 1fr; gap: 40px; align-items: center; min-height: min(640px, calc(100svh - 120px)); }
.hero2 h1 { font-size: clamp(46px, 7.6vw, 92px); letter-spacing: -.035em; }
.hero2-art { display: grid; place-items: center; }
.hero2-art .art { display: block; width: min(500px, 100%); }
.hero2-art img { display: block; width: 100%; }
html.motion .hero2-art { opacity: 0; }
.assure { display: flex; align-items: center; gap: 8px; margin: 20px 0 0; color: var(--on-2); font-size: 15px; }
.assure .ic { color: var(--accent); vertical-align: 0; }

/* how it works: the steps and the phone */
.g-story { width: 640px; height: 540px; right: -80px; top: 10%; background: radial-gradient(ellipse at center, color-mix(in srgb, #22C3CF 20%, transparent), transparent 70%); }
.story { padding: clamp(64px, 8.5vw, 120px) 0; }
.story-head { margin-bottom: clamp(28px, 4vw, 48px); }
.story-in { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.accordion { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.acc-item { position: relative; overflow: hidden; border-radius: var(--r-lg); background: var(--surface); border: 1px solid var(--edge); box-shadow: var(--elev-1);
  transition: box-shadow .3s, transform .3s, border-color .3s; }
.acc-item:hover { border-color: var(--line); }
.acc-item.on { border-color: var(--line); box-shadow: var(--elev-2); transform: translateY(-2px); }
.acc-bar { position: absolute; inset: 0 0 auto; height: 3px; }
.acc-fill { display: block; height: 100%; background: linear-gradient(90deg, #2AA8E0, #4BDCA4); transform-origin: left; transform: scaleX(0); }
.acc-item.on .acc-fill.run { animation: acc-fill var(--dur, 5s) linear forwards; }
.accordion.paused .acc-fill.run { animation-play-state: paused; }
@keyframes acc-fill { to { transform: scaleX(1); } }
.acc-h { margin: 0; font: inherit; letter-spacing: 0; }
.acc-head { display: flex; align-items: center; gap: 14px; width: 100%; padding: 18px 22px; border: 0; background: none; color: inherit; font: inherit; text-align: left; cursor: pointer; }
.acc-head:focus-visible { outline-offset: -4px; border-radius: var(--r-lg); }
.acc-num { font-size: 14px; font-weight: 700; letter-spacing: .08em; color: var(--on-2); transition: color .3s; }
.acc-item.on .acc-num { color: var(--accent); }
.acc-title { font-size: clamp(20px, 2.2vw, 24px); font-weight: 600; letter-spacing: -.01em; color: var(--on-2); transition: color .3s; }
.acc-item.on .acc-title { color: var(--on); }
.acc-icon { margin-left: auto; width: 34px; height: 34px; border-radius: 50%; display: grid; place-items: center; background: var(--surface-2); color: var(--on-2); transition: background .3s, color .3s; }
.acc-item.on .acc-icon { background: var(--ai); color: #08323B; }
.acc-body { display: grid; grid-template-rows: 0fr; transition: grid-template-rows .4s cubic-bezier(.16,1,.3,1); }
.acc-body-in { overflow: hidden; visibility: hidden; transition: visibility 0s .4s; }
.acc-item.on .acc-body { grid-template-rows: 1fr; }
.acc-item.on .acc-body-in { visibility: visible; transition-delay: 0s; }
html:not(.js) .acc-body { grid-template-rows: 1fr; } html:not(.js) .acc-body-in { visibility: visible; }
/* Every step's text is the same height, so the list never changes height and the page below never moves. */
.acc-pad { min-height: 108px; padding: 0 22px 20px 56px; }
.acc-pad p { margin: 0; color: var(--on-2); font-size: 16px; line-height: 1.55; }
.step-detail { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: 14px; }
.tag { display: inline-flex; align-items: center; gap: 8px; padding: 7px 13px; border-radius: 999px; background: var(--surface-2); border: 1px solid var(--edge); font-size: 14px; font-weight: 500; color: var(--on); }
.tag.on { background: var(--ai); color: #08323B; border-color: transparent; font-weight: 600; }
.diff { display: inline-flex; align-items: center; gap: 6px; padding: 6px 12px; border-radius: var(--r-sm); background: var(--surface-2); border: 1px solid var(--edge); font-size: 14px; }
.diff s { color: #E5484D; } .diff b { color: var(--accent); font-weight: 600; }
.wave { display: inline-flex; gap: 3px; align-items: center; height: 16px; }
.wave i { width: 3px; height: 100%; border-radius: 2px; background: currentColor; animation: wave 1s ease-in-out infinite; }
.wave i:nth-child(2) { animation-delay: .1s; } .wave i:nth-child(3) { animation-delay: .2s; } .wave i:nth-child(4) { animation-delay: .3s; } .wave i:nth-child(5) { animation-delay: .4s; }
@keyframes wave { 0%, 100% { transform: scaleY(.3); } 50% { transform: scaleY(1); } }
html.motion section:not(.is-focus) .wave i { animation-play-state: paused; }

/* the phone: a chat, and the keyboard in the theme of the page */
.story-stage { display: grid; place-items: center; }
.phone { width: 340px; max-width: 100%; padding: 12px; border-radius: 48px; background: #0B1416; box-shadow: 0 40px 80px rgba(8,50,59,.25), inset 0 0 0 2px #23363A; }
.ph-screen { overflow: hidden; border-radius: 38px; background: var(--host-bg); }
.ph-chat { display: flex; flex-direction: column; justify-content: flex-end; gap: 10px; min-height: 200px; padding: 30px 14px 12px; }
.incoming { align-self: flex-start; max-width: 85%; padding: 9px 13px; border-radius: 18px 18px 18px 6px; background: var(--host-bubble); color: var(--on); font-size: 14px; line-height: 1.4; }
.ph-field { min-height: 66px; padding: 10px 13px; border-radius: 20px; background: var(--host-field); color: var(--on); font-size: 15px; line-height: 1.45; box-shadow: 0 0 0 1.5px var(--kb-primary); }
.typo { text-decoration: underline wavy #E5484D; text-underline-offset: 4px; }
.ime { position: relative; height: 256px; background: var(--kb-bg); color: var(--kb-on); }
.ime-top { position: relative; height: 44px; }
.ime-bar, .ime-voice { position: absolute; inset: 0; display: flex; align-items: center; padding: 0 4px; transition: opacity .25s, transform .3s; }
.ime-voice { gap: 4px; opacity: 0; transform: translateY(8px); }
.ime.voice .ime-bar { opacity: 0; transform: translateY(-8px); }
.ime.voice .ime-voice { opacity: 1; transform: none; }
.sb { display: grid; place-items: center; flex: 0 0 38px; width: 38px; height: 44px; color: var(--kb-on-var); }
.sb .ic { width: 20px; height: 20px; }
.sb.ai > span { display: grid; place-items: center; width: 32px; height: 32px; border-radius: 50%; background: var(--ai); color: #08323B; transition: transform .18s, box-shadow .25s; }
.sb.ai .ic { width: 18px; height: 18px; }
.sb.tap > span { transform: scale(.86); box-shadow: 0 0 0 7px color-mix(in srgb, #22C3CF 32%, transparent); }
.sp { flex: 1; }
.ime-sugg { display: flex; align-items: center; height: 34px; padding: 0 6px; font-size: 14px; }
.ime-sugg span { position: relative; flex: 1 1 0; overflow: hidden; text-align: center; white-space: nowrap; text-overflow: ellipsis; padding: 0 4px; }
.ime-sugg span + span::before { content: ""; position: absolute; left: 0; top: 3px; bottom: 3px; width: 1px; background: var(--kb-line); }
.ime-sugg .b { font-weight: 600; }
.ime-keys { display: grid; gap: 6px; padding: 2px 3px 10px; }
.krow { display: grid; grid-template-columns: repeat(20, 1fr); }
.krow i { grid-column: span 2; display: grid; place-items: center; height: 36px; margin: 0 2px; border-radius: 7px; background: var(--kb-key); color: var(--kb-on);
  font-style: normal; font-size: 15px; box-shadow: 0 1px 0 rgba(0,0,0,.1); transition: background .1s, transform .1s; }
.krow .k3 { grid-column: span 3; } .krow .k10 { grid-column: span 10; } .krow b { grid-column: span 1; }
.krow i.fn { background: var(--kb-key-var); font-size: 12px; } .krow i.fn .ic { width: 16px; height: 16px; vertical-align: 0; }
.krow i.space { font-size: 11px; color: var(--kb-on-var); }
.krow i.ent { background: var(--kb-primary); color: var(--kb-on-primary); }
.krow i.tap { background: var(--kb-key-var); transform: translateY(1px) scale(.96); }
/* A panel takes the place of the smartbar, the suggestions and the keys, as in the app. */
.ime-panel { position: absolute; inset: 0; display: flex; flex-direction: column; background: var(--kb-bg); opacity: 0; visibility: hidden; transform: translateY(12px);
  transition: opacity .25s, transform .35s cubic-bezier(.2,.9,.3,1), visibility 0s .35s; }
.ime[data-open="fix"] .ip-fix, .ime[data-open="tr"] .ip-tr { opacity: 1; visibility: visible; transform: none; transition: opacity .25s, transform .35s cubic-bezier(.2,.9,.3,1); }
.ip-head { display: flex; align-items: center; gap: 2px; height: 44px; flex: 0 0 44px; padding: 0 12px 0 2px; border-bottom: 1px solid var(--kb-line); font-size: 15px; font-weight: 500; }
.ip-head .sb { color: var(--kb-on); }
.ip-body { display: flex; flex-direction: column; gap: 10px; flex: 1; min-height: 0; padding: 10px; }
.ip-chips { display: flex; gap: 6px; overflow: hidden; }
.ip-chips span { flex: 0 0 auto; display: inline-flex; align-items: center; height: 30px; padding: 0 11px; border-radius: 10px; background: var(--kb-key); color: var(--kb-on); font-size: 13px; font-weight: 500; }
.ip-chips .sel { background: var(--ai); color: #08323B; }
.ip-res { flex: 1; min-height: 0; padding: 10px 12px; border-radius: 12px; background: var(--kb-key); }
.ip-meta { font-size: 11px; color: var(--kb-on-var); }
.ip-text { margin-top: 4px; font-size: 14px; line-height: 1.45; }
.ip-text.wait { height: 2.6em; background: linear-gradient(var(--kb-key-var) 0 0) 0 .25em / 92% .7em no-repeat, linear-gradient(var(--kb-key-var) 0 0) 0 1.6em / 64% .7em no-repeat;
  animation: shimmer 1s ease-in-out infinite alternate; }
@keyframes shimmer { to { opacity: .45; } }
.ip-dock { display: flex; justify-content: flex-end; gap: 8px; }
.ip-btn { display: inline-flex; align-items: center; height: 34px; padding: 0 16px; border-radius: 999px; background: var(--kb-key-var); color: var(--kb-on); font-size: 13px; font-weight: 600; transition: transform .15s, box-shadow .25s; }
.ip-btn.ai { background: var(--ai); color: #08323B; }
.ip-btn.tap { transform: scale(.93); box-shadow: 0 0 0 7px color-mix(in srgb, #22C3CF 32%, transparent); }
/* Voice: the voice bar takes the smartbar's place while you speak (design/src/components.py, voicebar). */
.rec { display: inline-flex; align-items: center; gap: 6px; font: 500 12px/1 ui-monospace, Menlo, monospace; color: var(--kb-on-var); }
.rec i { width: 8px; height: 8px; border-radius: 50%; background: #E5484D; }
.veq { display: flex; align-items: center; gap: 2px; flex: 1; height: 26px; margin: 0 4px; }
.veq i { flex: 1; height: 100%; border-radius: 2px; background: linear-gradient(#2AA8E0, #4BDCA4); transform: scaleY(.1); }
.vlang { display: inline-flex; align-items: center; height: 28px; padding: 0 10px; border-radius: 10px; border: 1px solid var(--kb-line); font-size: 12px; }
.vprog { position: relative; display: none; flex: 1; align-items: center; height: 30px; margin: 0 4px; padding: 0 12px; overflow: hidden; border-radius: 15px; background: var(--kb-key); color: var(--kb-on-var); font-size: 12px; white-space: nowrap; }
.vprog::after { content: ""; position: absolute; left: 0; bottom: 0; width: 40%; height: 3px; background: var(--kb-primary); animation: prog 1s linear infinite; }
@keyframes prog { from { transform: translateX(-100%); } to { transform: translateX(260%); } }
.ime.tidy .rec, .ime.tidy .veq, .ime.tidy .vlang { display: none; }
.ime.tidy .vprog { display: flex; }

/* styles */
.g-tone { width: 720px; height: 460px; left: 50%; top: 15%; margin-left: -360px; background: radial-gradient(ellipse at center, color-mix(in srgb, #0E8DA6 16%, transparent), transparent 70%); }
.tone { padding: clamp(64px, 8.5vw, 120px) 0; text-align: center; }
.tone .lede { margin-left: auto; margin-right: auto; }
.tone-box { max-width: 820px; margin: 40px auto 0; }
.tone-in { display: flex; flex-wrap: wrap; justify-content: center; align-items: baseline; gap: 4px 10px; margin: 0 0 18px; color: var(--on-2); font-size: 16px; }
.tone-in span { font-size: 12px; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; color: var(--accent); }
.tone-chips { position: relative; display: inline-flex; flex-wrap: wrap; justify-content: center; gap: 4px; padding: 5px; border-radius: 999px; background: var(--surface); border: 1px solid var(--edge); box-shadow: var(--elev-1); }
.chip { position: relative; z-index: 1; padding: 10px 18px; border: 0; border-radius: 999px; background: none; color: var(--on-2); font: inherit; font-size: 15px; font-weight: 600; cursor: pointer; transition: color .2s; }
.chip.on { color: #08323B; }
html:not(.js) .chip.on { background: var(--ai); }
.chip-pill { position: absolute; z-index: 0; top: 0; left: 0; border-radius: 999px; background: var(--ai);
  transition: transform .5s cubic-bezier(.3,1.35,.5,1), width .5s cubic-bezier(.3,1.35,.5,1), height .5s; }
.tone-screen { display: flex; align-items: center; justify-content: center; min-height: 170px; margin-top: 24px; padding: clamp(28px, 4vw, 44px) clamp(20px, 3.5vw, 36px);
  border-radius: var(--r-lg); background: var(--surface); border: 1px solid var(--edge); box-shadow: var(--elev-2); }
.tone-text { margin: 0; color: var(--on); font-size: clamp(22px, 3vw, 34px); font-weight: 600; letter-spacing: -.02em; line-height: 1.35; text-wrap: balance; }
.tone-text .caret { width: 3px; background: #22C3CF; }

/* everything around it: stacking cards */
.stack { padding: clamp(64px, 8.5vw, 120px) 0 clamp(96px, 12vw, 160px); }
.cards { display: grid; gap: 24px; margin-top: 36px; }
.stack-end { height: clamp(140px, 20vh, 240px); }
.card { --mini: rgba(255,255,255,.75); --item: #fff; --item-on: #08323B;
  position: sticky; top: calc(92px + var(--i, 0) * 16px); z-index: var(--i, 0); display: grid; grid-template-columns: 1fr 1.1fr; gap: 32px; align-items: center;
  min-height: min(460px, 70vh); padding: clamp(24px, 4vw, 48px); border-radius: var(--r-xl); border: 1px solid var(--edge); background: var(--c-bg); color: var(--c-on);
  box-shadow: 0 -10px 40px rgba(8,50,59,.08); transform-origin: 50% 0; will-change: transform; }
.card h3 { margin: 16px 0 14px; font-size: clamp(30px, 4vw, 48px); letter-spacing: -.03em; }
.card p { margin: 0; max-width: 36ch; font-size: 18px; opacity: .82; }
.card-ic { display: grid; place-items: center; width: 48px; height: 48px; border-radius: var(--r-md); background: var(--ai); color: #08323B; }
.c-format { --c-bg: #E3F6EC; --c-on: #08323B; } .c-notes { --c-bg: #FFF3CF; --c-on: #3A2C00; }
.c-clip { --c-bg: #1257A8; --c-on: #fff; --mini: rgba(255,255,255,.1); --item: rgba(255,255,255,.14); --item-on: #fff; }
.c-langs { --c-bg: #DDF3F6; --c-on: #08323B; }
.c-clip em { background: linear-gradient(120deg, #BFF3FF, #8FF0C8); -webkit-background-clip: text; background-clip: text; }
@media (prefers-color-scheme: dark) {
  /* Deep tints of the same colours, so dark mode has no bright slabs. */
  .card { --mini: rgba(255,255,255,.05); --item: rgba(255,255,255,.08); --item-on: #E6F1F3; box-shadow: 0 -10px 40px rgba(0,0,0,.35); }
  .c-format { --c-bg: #10261F; --c-on: #E6F1F3; } .c-notes { --c-bg: #29230F; --c-on: #F6EBC8; }
  .c-clip { --c-bg: #0F2C50; --c-on: #E6F1F3; } .c-langs { --c-bg: #0E262B; --c-on: #E6F1F3; }
}
.mini { display: grid; gap: 12px; padding: 22px; border-radius: var(--r-lg); background: var(--mini); color: var(--item-on); font-size: 16px; box-shadow: var(--elev-1); border: 1px solid rgba(255,255,255,.12); }
.raw { opacity: .6; font-style: italic; }
.list { margin: 0; padding: 14px 18px 14px 36px; border-radius: var(--r-md); background: var(--item); } .list li { min-height: 1.4em; margin: 4px 0; }
.note { padding: 16px; border-radius: var(--r-md); background: var(--item); line-height: 1.5; } .note mark { background: color-mix(in srgb, #4BDCA4 35%, transparent); color: inherit; border-radius: 4px; }
.ask { display: flex; align-items: center; gap: 8px; min-height: 44px; padding: 10px 14px; border-radius: 999px; background: #08323B; color: #E6F1F3; font-size: 15px; }
.ask .ic { color: #4BDCA4; }
.clip { display: flex; justify-content: space-between; align-items: center; gap: 8px; padding: 12px 16px; border-radius: var(--r-md); background: var(--item); }
.clip.pin { outline: 1px solid rgba(255,255,255,.3); }
.hello { gap: 0; padding: 26px; }
.hello-card { display: flex; align-items: center; min-height: 1.4em; font-size: clamp(40px, 5.4vw, 64px); font-weight: 700; letter-spacing: -.02em; line-height: 1.3; }
.hello-card .caret { width: 3px; background: #22C3CF; }
.hello-foot { display: flex; align-items: flex-start; gap: 14px; margin-top: 18px; padding-top: 18px; border-top: 1px solid color-mix(in srgb, currentColor 14%, transparent); }
.globe { display: grid; place-items: center; flex: 0 0 auto; width: 42px; height: 42px; border-radius: var(--r-sm); background: var(--item); }
.lang-names { display: flex; flex-wrap: wrap; gap: 4px 14px; margin: 0; padding: 0; list-style: none; font-size: 15px; }
.lang-names li { opacity: .7; transition: color .3s, opacity .3s; } .lang-names li.on { opacity: 1; color: #0B727B; font-weight: 600; }
@media (prefers-color-scheme: dark) { .lang-names li.on { color: #5FD3DF; } }

/* privacy: the promises and where your text goes */
.vault { position: relative; overflow: clip; padding: clamp(80px, 10vw, 140px) 0; background: #061113; color: #E6F1F3; }
.vault .lede { color: #A9BEC3; } .vault .kicker { color: #5FD3DF; }
.vault em { background: linear-gradient(120deg, #2AA8E0, #4BDCA4); -webkit-background-clip: text; background-clip: text; }
.g3 { width: 760px; height: 760px; right: -10%; top: 0; background: radial-gradient(circle, rgba(34,195,207,.16), transparent 70%); }
.vault-grid { position: relative; display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.vows { display: grid; gap: 6px; margin: 28px 0 0; padding: 0; list-style: none; }
.vow button { display: flex; align-items: flex-start; gap: 16px; width: 100%; padding: 14px 16px; border: 0; border-radius: var(--r-md); background: none; color: inherit; font: inherit;
  text-align: left; cursor: pointer; opacity: .55; transition: opacity .3s, background .3s; }
.vow button:hover { opacity: .85; }
.vow.on button { opacity: 1; background: rgba(230,241,243,.05); }
.vow button:focus-visible { outline-color: #5FD3DF; }
html:not(.js) .vow button { opacity: 1; }
.pk { display: grid; place-items: center; flex: 0 0 auto; width: 40px; height: 40px; border-radius: var(--r-sm); background: rgba(230,241,243,.08); color: #8FF0C8; transition: background .3s, color .3s; }
.pk .ic { width: 22px; height: 22px; }
.vow.on .pk { background: var(--ai); color: #08323B; }
.vow-t b { display: block; font-size: 18px; font-weight: 600; color: #E6F1F3; }
.vow-t span { display: block; margin-top: 4px; color: #A9BEC3; font-size: 15px; line-height: 1.5; }
/* The last word: the key won't look at your message. */
.peek-note { display: grid; grid-template-columns: 240px 1fr; gap: 36px; align-items: center; margin-top: clamp(56px, 7vw, 88px); padding: 28px 36px;
  border-radius: 28px; background: rgba(230,241,243,.04); border: 1px solid rgba(230,241,243,.1); }
.peek-note h3 { font-size: clamp(22px, 2.6vw, 28px); font-weight: 700; color: #E6F1F3; }
.peek-note p { margin: 10px 0 14px; max-width: 58ch; color: #A9BEC3; font-size: 16px; line-height: 1.6; }
.peek { display: block; width: 100%; height: auto; overflow: visible; }
.peek-msg { fill: rgba(230,241,243,.08); stroke: rgba(230,241,243,.16); }
.peek-words { fill: #E6F1F3; opacity: .6; }
.peek-key, .peek-say { transform-box: fill-box; transform-origin: 50% 100%; }
.peek-key { transform: rotate(7deg); }
html.motion .peek-note .peek-key { animation: peek-turn 4.8s ease-in-out infinite; }
html.motion .peek-note .peek-say { animation: peek-say 4.8s ease-in-out infinite; }
html.motion section:not(.is-focus) .peek-note .peek-key, html.motion section:not(.is-focus) .peek-note .peek-say { animation-play-state: paused; }
@keyframes peek-turn { 0%, 100% { transform: rotate(7deg); } 8% { transform: rotate(-3deg) translateX(-2px); } 14% { transform: rotate(10deg); } 20%, 92% { transform: rotate(7deg); } }
@keyframes peek-say { 0%, 4% { opacity: 0; transform: scale(.8); } 12%, 84% { opacity: 1; transform: none; } 94%, 100% { opacity: 0; transform: scale(.9); } }
.vault .link { display: inline-flex; align-items: center; gap: 2px; color: #5FD3DF; font-weight: 600; text-decoration: none; white-space: nowrap; }
.vault .link:hover { text-decoration: underline; }
/* The seal: your phone, a locked boundary; the only way out is the encrypted line to AI, and only on a tap. */
.seal { position: relative; display: grid; justify-items: center; }
.seal-phone { position: relative; width: min(420px, 100%); padding: 18px; border-radius: 28px; background: linear-gradient(#0F1E22, #0A1518);
  box-shadow: 0 0 0 6px rgba(34,195,207,.05), 0 30px 60px rgba(0,0,0,.45), 0 0 70px rgba(34,195,207,.12); }
.seal-phone::before { content: ""; position: absolute; inset: 0; padding: 1px; border-radius: inherit; pointer-events: none;
  background: linear-gradient(140deg, #2AA8E0, rgba(95,211,223,.15) 35%, rgba(75,220,164,.15) 65%, #4BDCA4);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0); -webkit-mask-composite: xor; mask-composite: exclude; }
.seal-head { display: flex; align-items: center; gap: 10px; font-size: 13px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: #A9BEC3; }
.seal-lock { display: grid; place-items: center; width: 30px; height: 30px; border-radius: 10px; background: rgba(75,220,164,.14); color: #8FF0C8; transition: box-shadow .4s; }
.seal-badge { margin-left: auto; padding: 4px 10px; border-radius: 999px; background: rgba(75,220,164,.14); color: #8FF0C8; font-size: 12px; letter-spacing: .02em; text-transform: none; }
.seal.p0 .seal-lock { box-shadow: 0 0 0 6px rgba(75,220,164,.12), 0 0 24px rgba(75,220,164,.35); }
.seal-field { min-height: 76px; margin-top: 14px; padding: 12px 14px; border-radius: 16px; background: rgba(230,241,243,.06); border: 1px solid rgba(230,241,243,.1); }
.seal-label { display: block; margin-bottom: 4px; color: #7F969B; font-size: 11px; letter-spacing: .1em; text-transform: uppercase; }
.seal-text { color: #E6F1F3; font-size: 17px; transition: background .2s; }
.seal-text.sel { background: rgba(34,195,207,.3); border-radius: 4px; }
.seal-text.code { color: #8FF0C8; font-family: ui-monospace, Menlo, monospace; font-size: 15px; }
.seal-field .caret { background: #5FD3DF; }
.seal-bar { display: flex; align-items: center; margin-top: 10px; }
.seal-bar .sb { flex-basis: 42px; width: 42px; }
.seal-bar .sb.ai > span { transition: transform .18s, box-shadow .25s, filter .3s, opacity .3s; }
.seal.pw .seal-bar .sb.ai > span { filter: grayscale(1); opacity: .3; }
.seal-offs { display: flex; flex-wrap: wrap; gap: 6px; max-height: 0; overflow: hidden; opacity: 0; transition: max-height .4s, opacity .3s, margin .4s; }
.seal.pw .seal-offs { max-height: 60px; margin-top: 10px; opacity: 1; }
.seal-offs span { display: inline-flex; align-items: center; gap: 6px; padding: 5px 10px; border-radius: 999px; background: rgba(75,220,164,.14); color: #8FF0C8; font-size: 13px; font-weight: 600; }
.seal-pipe { position: relative; width: 2px; height: 116px; }
.pipe { position: absolute; inset: 0; background: repeating-linear-gradient(to bottom, rgba(95,211,223,.28) 0 6px, transparent 6px 12px); transition: opacity .3s; }
.seal.p1 .pipe { background: repeating-linear-gradient(to bottom, #5FD3DF 0 6px, transparent 6px 12px); animation: flow .5s linear infinite; }
.seal.pw .pipe, .seal.p0 .pipe { opacity: .45; }
@keyframes flow { to { background-position: 0 12px; } }
.packet { position: absolute; left: 50%; top: 50%; translate: -50% -50%; padding: 6px 12px; border-radius: 999px; background: #0B1D20; border: 1px solid rgba(75,220,164,.45);
  box-shadow: 0 0 24px rgba(75,220,164,.25); color: #8FF0C8; font: 600 12px/1 ui-monospace, Menlo, monospace; letter-spacing: .08em; white-space: nowrap; opacity: 0;
  transition: top .9s cubic-bezier(.45,0,.25,1), opacity .25s; }
html:not(.js) .packet, .seal.p1 .packet.go { opacity: 1; }
.pipe-tag { position: absolute; left: 62px; top: 50%; translate: 0 -50%; display: inline-flex; align-items: center; gap: 6px; color: #A9BEC3; font-size: 13px; white-space: nowrap; }
.pipe-tag .ic { color: #5FD3DF; }
.seal-ai { display: inline-flex; align-items: center; gap: 10px; padding: 8px 18px 8px 8px; border-radius: 999px; background: rgba(230,241,243,.05); border: 1px solid rgba(230,241,243,.12);
  color: #A9BEC3; font-weight: 600; transition: opacity .3s; }
.ai-orb { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 50%; background: var(--ai); color: #08323B; }
.seal.pw .seal-ai, .seal.p0 .seal-ai { opacity: .45; }
.seal-ai.busy .ai-orb { animation: orb .45s ease-in-out infinite alternate; }
@keyframes orb { to { box-shadow: 0 0 0 9px rgba(34,195,207,.16), 0 0 36px rgba(75,220,164,.55); } }

/* closing */
.g-close { width: 520px; height: 420px; left: -80px; top: -20px; background: radial-gradient(ellipse at center, color-mix(in srgb, #22C3CF 20%, transparent), transparent 70%); }
.closing2 { padding: clamp(72px, 9vw, 130px) 0; }
.split { display: grid; grid-template-columns: 1fr 1.2fr; gap: 48px; align-items: center; }
.close-art img { display: block; width: min(320px, 70vw); margin: 0 auto; }

@media (max-width: 860px) {
  .hero2-in, .story-in, .vault-grid, .card, .split { grid-template-columns: 1fr; }
  .hero2-in { min-height: 0; gap: 8px; }
  .hero2-art .art { width: min(340px, 86vw); }
  .story-in { gap: 32px; }
  /* The steps become a row of tabs above the phone, so a step and its demo are on screen together.
     Every step's text shares one cell, so the phone below never moves. Without JavaScript the list stays as written. */
  html.js .story-in { gap: 24px; }
  html.js .accordion { grid-template-columns: repeat(4, 1fr); gap: 0; width: min(100%, 460px); justify-self: center; }
  html.js .accordion::before { content: ""; grid-row: 1; grid-column: 1 / -1; border-radius: 999px; background: var(--surface); border: 1px solid var(--edge); box-shadow: var(--elev-1); }
  html.js .acc-item { display: contents; }
  html.js .acc-item:nth-child(1) > :not(.acc-body) { grid-column: 1; }
  html.js .acc-item:nth-child(2) > :not(.acc-body) { grid-column: 2; }
  html.js .acc-item:nth-child(3) > :not(.acc-body) { grid-column: 3; }
  html.js .acc-item:nth-child(4) > :not(.acc-body) { grid-column: 4; }
  html.js .acc-h { grid-row: 1; position: relative; z-index: 1; margin: 4px; }
  html.js .acc-head { justify-content: center; gap: 0; padding: 10px 4px; border-radius: 999px; transition: background .3s; }
  html.js .acc-item.on .acc-head { background: var(--surface-2); }
  html.js .acc-num, html.js .acc-icon, html.js .step-detail { display: none; }
  html.js .acc-title { font-size: 15px; }
  html.js .acc-bar { grid-row: 1; position: relative; inset: auto; z-index: 2; align-self: end; height: 2px; margin: 0 20px 9px; border-radius: 2px; overflow: hidden; opacity: 0; transition: opacity .3s; }
  html.js .acc-item.on .acc-bar { opacity: 1; }
  html.js .acc-body { grid-row: 2; grid-column: 1 / -1; grid-template-rows: 1fr; transition: none; }
  html.js .acc-body-in { opacity: 0; transition: opacity .25s, visibility 0s .25s; }
  html.js .acc-item.on .acc-body-in { opacity: 1; transition: opacity .3s; }
  html.js .acc-pad { min-height: 0; padding: 16px 6px 0; }
  .card { top: calc(76px + var(--i, 0) * 10px); min-height: 0; }
  /* The heading first, then the demo, then the promises that drive it. */
  .vault-grid { gap: 0; }
  .vault-copy { display: contents; }
  .seal { order: 1; margin: 36px 0 8px; }
  .vows { order: 2; }
  .peek-note { grid-template-columns: 1fr; gap: 12px; padding: 24px 22px; }
  .peek { width: min(240px, 80%); margin: 0 auto; }
}
@media (max-width: 560px) {
  .acc-head { padding: 16px 18px; } .acc-pad { padding: 0 18px 18px; min-height: 0; }
  .phone { width: 312px; border-radius: 44px; } .ph-chat { min-height: 172px; padding-top: 22px; }
  .tone-chips { width: 100%; } .chip { padding: 8px 11px; font-size: 13px; }
  .tone-screen { min-height: 140px; margin-top: 18px; padding: 20px 14px; } .tone-text { font-size: 19px; }
  .vow button { padding: 12px 8px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .caret, .wave i, .vprog::after, .ip-text.wait, .pipe, .ai-orb { animation: none !important; }
  .acc-body, .acc-body-in, .chip-pill, .nav-hl, .ime-panel, .ime-bar, .ime-voice, .packet { transition: none !important; }
}