:root {
  --hvi-ink: #0c1216;
  --hvi-muted: #5d6b73;
  --hvi-line: #d4dde1;
  --hvi-paper: #f3f6f7;
  --hvi-surface: #ffffff;
  --hvi-dark: #101920;
  --hvi-dark-soft: #18242c;
  --hvi-accent: #35a4cd;
  --hvi-accent-soft: #dceff6;
  --hvi-shell: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body.hvi-page {
  margin: 0;
  color: var(--hvi-ink);
  background: var(--hvi-surface);
  font-family: Inter, Manrope, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
  text-rendering: optimizeLegibility;
}
.hvi-page a { color: inherit; text-decoration: none; }
.hvi-page button, .hvi-page textarea, .hvi-page input { font: inherit; }
.hvi-page button { color: inherit; }
.hvi-shell { width: min(calc(100% - 48px), var(--hvi-shell)); margin-inline: auto; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

.hi-product-header {
  position: relative;
  z-index: 20;
  background: rgba(255,255,255,.96);
  border-bottom: 1px solid var(--hvi-line);
  backdrop-filter: blur(18px);
}
.hi-product-nav { min-height: 68px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.hi-product-brand { display: inline-flex; align-items: center; }
.hi-product-brand img { width: 158px; height: auto; display: block; }
.hi-product-nav nav { display: flex; align-items: center; gap: 22px; color: #35434b; font-size: 12px; font-weight: 700; }
.hi-product-nav nav a { padding-block: 9px; }
.hi-product-nav nav a:hover, .hi-product-nav nav a:focus-visible { color: #000; }
.hi-product-nav nav span { color: #71818a; letter-spacing: .08em; }

.hvi-hero { min-height: calc(100svh - 68px); display: grid; align-items: center; padding: 46px 0 52px; background: var(--hvi-paper); }
.hvi-hero-inner { display: grid; justify-items: center; }
.hvi-product-title { max-width: 900px; margin-bottom: 30px; text-align: center; }
.hvi-product-title p { margin: 0 0 13px; color: #3d5966; font-size: 12px; font-weight: 900; letter-spacing: .16em; }
.hvi-product-title p span { color: #72838b; font-weight: 700; letter-spacing: .04em; text-transform: none; }
.hvi-product-title h1 { margin: 0; font-size: clamp(48px, 6.4vw, 88px); line-height: .94; letter-spacing: 0; text-wrap: balance; }
.hvi-privacy-note { margin: 15px 0 0; color: #687780; font-size: 11px; text-align: center; }

.hvi-assistant {
  width: min(100%, 940px);
  overflow: hidden;
  color: #eaf1f3;
  background: var(--hvi-dark);
  border: 1px solid #273740;
  border-radius: 8px;
  box-shadow: 0 28px 80px rgba(22, 35, 43, .16);
}
.hvi-assistant-bar { min-height: 55px; display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 12px 16px 12px 20px; border-bottom: 1px solid #2c3a42; }
.hvi-assistant-bar > div { display: flex; align-items: baseline; gap: 8px; }
.hvi-assistant-bar strong { color: #fff; font-size: 14px; }
.hvi-assistant-bar h1 { margin: 0; color: #fff; font-size: 14px; line-height: 1.2; letter-spacing: 0; }
.hvi-assistant-bar span { color: #81939d; font-size: 11px; }
.hvi-assistant-bar button { padding: 7px 9px; border: 0; color: #aebdc4; background: transparent; font-size: 11px; cursor: pointer; }
.hvi-assistant-bar button:hover, .hvi-assistant-bar button:focus-visible { color: #fff; }
.hvi-source-context { margin: 14px 18px 0; padding: 10px 12px; color: #bfe3ef; background: #19313c; border-left: 2px solid var(--hvi-accent); font-size: 12px; }
.hvi-thread { min-height: 100px; max-height: 330px; overflow-y: auto; padding: 18px; scrollbar-color: #425761 transparent; scrollbar-width: thin; }
.hvi-welcome { max-width: 680px; color: #b8c6cc; font-size: 14px; }
.hvi-welcome strong { display: block; margin-bottom: 5px; color: #fff; font-size: 16px; }
.hvi-turn { display: grid; gap: 10px; margin-bottom: 16px; }
.hvi-turn.user { justify-items: end; }
.hvi-turn.user .hvi-rich-stack { justify-items: end; }
.hvi-turn.assistant { justify-items: start; }
.hvi-message-bubble { max-width: min(82%, 700px); padding: 11px 14px; border-radius: 8px; font-size: 14px; line-height: 1.5; }
.hvi-turn.user .hvi-message-bubble { color: #0d1a20; background: #dceff6; }
.hvi-turn.assistant .hvi-message-bubble { color: #dfe9ed; background: #1b2830; border: 1px solid #30414a; }
.hvi-rich-stack { width: min(100%, 760px); display: grid; gap: 9px; }
.hvi-rich-card { padding: 15px; color: #dbe6ea; background: #15232b; border: 1px solid #31434d; border-radius: 6px; }
.hvi-rich-card > span { display: block; margin-bottom: 8px; color: #81c8e1; font-size: 10px; font-weight: 850; letter-spacing: .12em; text-transform: uppercase; }
.hvi-rich-card strong { color: #fff; }
.hvi-rich-card p { margin: 7px 0 0; color: #afc0c7; font-size: 13px; }
.hvi-rich-card a { display: inline-flex; margin-top: 12px; color: #a9def0; font-size: 12px; font-weight: 800; }
.hvi-scheme { display: grid; gap: 7px; }
.hvi-scheme-node { position: relative; padding: 9px 11px; color: #e9f2f5; background: #1e3039; border-left: 2px solid #57b7d8; font-size: 12px; font-weight: 750; }
.hvi-scheme-node + .hvi-scheme-node::before { content: "↓"; display: block; margin: -6px 0 4px; color: #69b9d4; }
.hvi-rich-table { width: 100%; border-collapse: collapse; font-size: 12px; }
.hvi-rich-table th, .hvi-rich-table td { padding: 9px 8px; border-top: 1px solid #344750; text-align: left; vertical-align: top; }
.hvi-rich-table th { color: #91a5ae; font-weight: 700; }
.hvi-comparison { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 8px; }
.hvi-comparison > div { padding: 11px; background: #1b2b34; }
.hvi-comparison small { display: block; margin-top: 5px; color: #a7b8bf; }
.hvi-meter { display: grid; grid-template-columns: repeat(8,1fr); gap: 4px; margin-top: 12px; }
.hvi-meter span { height: 26px; background: #233842; }
.hvi-meter span.on { background: #4ba9ca; }
.hvi-file-card { display: flex; align-items: center; justify-content: space-between; gap: 15px; }
.hvi-file-card small { color: #8fa3ad; }
.hvi-handoff-card { border-color: #4d7889; background: #19303a; }
.hvi-page .hvi-handoff-button { min-height: 42px; margin-top: 13px; padding: 9px 14px; border: 1px solid #9edcf1; color: #10202a; background: #9edcf1; border-radius: 999px; font-weight: 850; cursor: pointer; }
.hvi-typing { display: inline-flex; gap: 4px; padding: 9px 11px; background: #1b2830; border-radius: 8px; }
.hvi-typing span { width: 5px; height: 5px; border-radius: 50%; background: #8bbccc; animation: hvi-typing 1s infinite; }
.hvi-typing span:nth-child(2) { animation-delay: .15s; }.hvi-typing span:nth-child(3) { animation-delay: .3s; }

.hvi-files { display: flex; flex-wrap: wrap; gap: 7px; padding: 0 18px 12px; }
.hvi-files span { display: inline-flex; align-items: center; gap: 7px; max-width: 100%; padding: 7px 9px; color: #c5d3d8; background: #1c2a32; border: 1px solid #364852; border-radius: 999px; font-size: 11px; }
.hvi-files button { padding: 0; border: 0; color: #92a6ae; background: transparent; cursor: pointer; }
.hvi-composer { margin: 0 18px; overflow: hidden; background: #fff; border: 1px solid #6c7d86; border-radius: 8px; }
.hvi-composer textarea { width: 100%; min-height: 82px; display: block; resize: vertical; padding: 14px 15px 8px; border: 0; outline: 0; color: #101820; background: #fff; font-size: 15px; line-height: 1.45; }
.hvi-composer textarea::placeholder { color: #77858c; }
.hvi-composer-actions { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 8px; }
.hvi-composer-actions button { min-height: 40px; padding: 8px 13px; border-radius: 999px; cursor: pointer; }
.hvi-attach { border: 0; color: #53666f; background: transparent; font-size: 12px; font-weight: 750; }
.hvi-send { border: 1px solid #111b21; color: #fff !important; background: #111b21; font-size: 13px; font-weight: 850; }
.hvi-send span { margin-left: 8px; }
.hvi-send:disabled { opacity: .55; cursor: wait; }
.hvi-quick-prompts { display: flex; flex-wrap: wrap; gap: 7px; padding: 13px 18px 18px; }
.hvi-quick-prompts button { min-height: 34px; padding: 6px 11px; border: 1px solid #3a4b54; color: #b9c8ce; background: transparent; border-radius: 999px; font-size: 11px; cursor: pointer; }
.hvi-quick-prompts button:hover, .hvi-quick-prompts button:focus-visible { color: #fff; border-color: #72bad3; }

.hvi-handoff-form { width: min(100%, 760px); padding: 16px; color: #dae6ea; background: #14242c; border: 1px solid #3d5763; border-radius: 6px; }
.hvi-handoff-form h3 { margin: 0 0 12px; color: #fff; font-size: 18px; }
.hvi-handoff-form-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 9px; }
.hvi-handoff-form label { display: grid; gap: 5px; color: #9eb0b8; font-size: 11px; font-weight: 750; }
.hvi-handoff-form input { min-width: 0; height: 42px; padding: 8px 10px; border: 1px solid #536873; border-radius: 4px; color: #fff; background: #1e3038; }
.hvi-handoff-form button { margin-top: 12px; min-height: 42px; padding: 9px 14px; border: 0; border-radius: 999px; color: #0c1b22; background: #9edcf1; font-weight: 850; cursor: pointer; }
.hvi-handoff-status { margin: 10px 0 0; color: #b8c8ce; font-size: 12px; }
.hvi-handoff-status.error { color: #ffaaa2; }
.hvi-handoff-success { color: #dff4e8; }

.hvi-product-section { padding: clamp(70px,7vw,100px) 0; background: #fff; }
.hvi-product-copy { display: grid; grid-template-columns: minmax(0,.9fr) minmax(0,1.1fr); column-gap: clamp(50px,8vw,120px); align-items: start; }
.hvi-product-copy .hvi-kicker { grid-column: 1 / -1; }
.hvi-trust-section { padding: clamp(62px,7vw,94px) 0; background: #e9eff1; }
.hvi-trust-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); border-top: 1px solid #bdcbd0; border-left: 1px solid #bdcbd0; }
.hvi-trust-grid article { min-height: 330px; padding: clamp(28px,4vw,52px); border-right: 1px solid #bdcbd0; border-bottom: 1px solid #bdcbd0; }
.hvi-trust-grid article p:last-child { margin: 24px 0 0; color: #4d626c; font-size: 16px; line-height: 1.65; }
.hvi-kicker { margin: 0 0 16px; color: #486370; font-size: 11px; font-weight: 900; letter-spacing: .14em; }
.hvi-page h2 { margin: 0; max-width: 680px; font-size: clamp(38px,5vw,66px); line-height: 1.02; letter-spacing: 0; text-wrap: balance; }
.hvi-lead { margin: 0; color: #42555f; font-size: clamp(18px,1.8vw,23px); line-height: 1.6; }
.hvi-value-grid { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); margin-top: 45px; border-top: 1px solid var(--hvi-line); border-left: 1px solid var(--hvi-line); }
.hvi-value-grid article { min-height: 260px; padding: 22px; border-right: 1px solid var(--hvi-line); border-bottom: 1px solid var(--hvi-line); }
.hvi-value-grid span { color: #70858f; font-size: 11px; font-weight: 850; letter-spacing: .12em; }
.hvi-value-grid strong { display: block; margin-top: 42px; font-size: 21px; line-height: 1.15; }
.hvi-value-grid p { margin: 18px 0 0; color: #536771; font-size: 14px; line-height: 1.55; }
.hvi-home-hero { padding: clamp(48px,6vw,78px) 0; background: var(--hvi-paper); }
.hvi-home-layout { display: grid; grid-template-columns: minmax(280px,.62fr) minmax(620px,1.38fr); gap: clamp(42px,6vw,82px); align-items: center; }
.hvi-home-copy { align-self: start; padding-top: 28px; }
.hvi-home-copy .hvi-kicker span { color: #7a8990; letter-spacing: .03em; text-transform: none; }
.hvi-home-copy h1 { margin: 0; max-width: 430px; font-size: clamp(42px,4.3vw,62px); line-height: 1.02; letter-spacing: 0; text-wrap: balance; }
.hvi-home-copy > p:last-child { margin: 28px 0 0; max-width: 430px; color: #4d626c; font-size: 17px; line-height: 1.65; }
.hvi-home-layout .hvi-assistant { width: 100%; box-shadow: 0 26px 76px rgba(22,35,43,.18); }
.hvi-home-layout .hvi-thread { max-height: 320px; }
.hvi-home-value-section { padding: clamp(68px,7vw,100px) 0; background: #fff; }
.hvi-home-value-heading { display: grid; grid-template-columns: minmax(0,1fr) minmax(300px,.72fr); column-gap: clamp(42px,8vw,120px); align-items: end; }
.hvi-home-value-heading .hvi-kicker { grid-column: 1 / -1; }
.hvi-home-value-heading > p:last-child { margin: 0; color: #50646e; font-size: 18px; line-height: 1.6; }
.hvi-home-values { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); margin-top: 46px; border-top: 1px solid var(--hvi-line); border-left: 1px solid var(--hvi-line); background: #fff; }
.hvi-home-values article { min-width: 0; min-height: 280px; padding: 24px; border-right: 1px solid var(--hvi-line); border-bottom: 1px solid var(--hvi-line); }
.hvi-home-values span { color: #70858f; font-size: 10px; font-weight: 850; letter-spacing: .12em; }
.hvi-home-values strong { display: block; margin-top: 38px; font-size: 20px; line-height: 1.18; overflow-wrap: normal; word-break: normal; hyphens: none; }
.hvi-home-values p { margin: 17px 0 0; color: #536771; font-size: 14px; line-height: 1.58; }
.hvi-explore { padding: clamp(62px,7vw,94px) 0; color: #e8f0f2; background: #101920; }
.hvi-explore .hvi-kicker { color: #76bed8; }
.hvi-explore h2 { color: #fff; }
.hvi-explore-links { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); margin-top: 50px; border-top: 1px solid #34464f; border-left: 1px solid #34464f; }
.hvi-explore-links a { min-height: 100px; display: flex; align-items: flex-end; gap: 15px; padding: 20px; border-right: 1px solid #34464f; border-bottom: 1px solid #34464f; font-size: 18px; font-weight: 800; }
.hvi-explore-links a:hover, .hvi-explore-links a:focus-visible { background: #172730; }
.hvi-explore-links span { color: #6eaec6; font-size: 11px; }

@keyframes hvi-typing { 50% { opacity: .3; transform: translateY(-2px); } }

@media (max-width: 780px) {
  .hvi-shell { width: min(calc(100% - 32px), var(--hvi-shell)); }
  .hi-product-nav { min-height: 62px; }
  .hi-product-brand img { width: 142px; }
  .hi-product-nav nav { gap: 12px; font-size: 11px; }
  .hi-product-nav nav a:first-child { display: none; }
  .hvi-hero { min-height: calc(100svh - 62px); padding: 34px 0 38px; }
  .hvi-product-title { margin-bottom: 23px; }
  .hvi-product-title p { font-size: 10px; }
  .hvi-product-title h1 { font-size: clamp(41px,12vw,57px); line-height: .98; }
  .hvi-assistant-bar { min-height: 52px; padding-left: 14px; }
  .hvi-assistant-bar > div { display: grid; gap: 0; }
  .hvi-thread { max-height: 300px; padding: 14px; }
  .hvi-message-bubble { max-width: 94%; }
  .hvi-composer { margin-inline: 12px; }
  .hvi-files, .hvi-quick-prompts { padding-inline: 12px; }
  .hvi-quick-prompts { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); }
  .hvi-quick-prompts button { width: 100%; }
  .hvi-product-copy, .hvi-trust-grid { grid-template-columns: 1fr; }
  .hvi-product-copy { row-gap: 26px; }
  .hvi-value-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .hvi-value-grid article { min-height: 230px; }
  .hvi-home-hero { padding: 36px 0 48px; }
  .hvi-home-layout { grid-template-columns: 1fr; gap: 30px; }
  .hvi-home-copy { padding-top: 0; }
  .hvi-home-copy h1 { max-width: 600px; font-size: clamp(38px,8vw,52px); }
  .hvi-home-copy > p:last-child { max-width: 660px; margin-top: 20px; font-size: 16px; }
  .hvi-home-layout .hvi-thread { max-height: 270px; }
  .hvi-home-value-heading { grid-template-columns: 1fr; row-gap: 20px; }
  .hvi-home-value-heading > p:last-child { font-size: 16px; }
  .hvi-home-values { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .hvi-home-values article { min-height: 240px; padding: 20px; }
  .hvi-home-values strong { margin-top: 26px; font-size: 18px; }
  .hvi-home-values p { font-size: 13px; }
  .hvi-trust-grid article { min-height: 0; }
  .hvi-explore-links { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .hvi-handoff-form-grid, .hvi-comparison { grid-template-columns: 1fr; }
}

@media (max-width: 430px) {
  .hi-product-nav nav a { display: none; }
  .hvi-product-title h1 { font-size: 39px; }
  .hvi-product-title h1 br { display: none; }
  .hvi-assistant-bar button { font-size: 10px; }
  .hvi-composer textarea { min-height: 76px; font-size: 14px; }
  .hvi-composer-actions { align-items: stretch; }
  .hvi-composer-actions button { padding-inline: 11px; }
  .hvi-privacy-note { max-width: 310px; }
  .hvi-page h2 { font-size: 36px; }
  .hvi-value-grid { grid-template-columns: 1fr; }
  .hvi-value-grid article { min-height: 0; }
  .hvi-value-grid strong { margin-top: 24px; }
  .hvi-home-hero { padding-top: 26px; }
  .hvi-home-layout { gap: 24px; }
  .hvi-home-copy h1 { font-size: 34px; }
  .hvi-home-copy > p:last-child { font-size: 15px; line-height: 1.55; }
  .hvi-home-layout .hvi-thread { max-height: 170px; }
  .hvi-home-value-section { padding: 54px 0 64px; }
  .hvi-home-values { grid-template-columns: 1fr; margin-top: 32px; }
  .hvi-home-values article { min-height: 0; padding: 20px; }
  .hvi-home-values strong { margin-top: 18px; font-size: 18px; }
  .hvi-home-values p { margin-top: 10px; font-size: 13px; }
  .hvi-explore-links { grid-template-columns: 1fr; }
  .hvi-explore-links a { min-height: 78px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .hvi-typing span { animation: none; }
}