:root {
  color-scheme: dark;
  --ink: #080909;
  --surface: #101112;
  --surface-2: #151719;
  --line: #2a2d30;
  --line-light: #3b3f43;
  --text: #f1f2f2;
  --muted: #94999e;
  --metal: #c3c7ca;
  --mint: #79d8c4;
  --violet: #aeb1d9;
}

* { box-sizing: border-box; }

html { background: var(--ink); }

body {
  min-height: 100vh;
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 72% 10%, rgba(121,216,196,.055), transparent 27%),
    linear-gradient(180deg, #0b0c0c 0, var(--ink) 42%);
  font: 400 16px/1.6 "Archivo", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.nav {
  position: sticky;
  z-index: 3;
  top: 0;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  min-height: 72px;
  padding: 0 clamp(20px, 4vw, 58px);
  border-bottom: 1px solid var(--line);
  background: rgba(8,9,9,.92);
  backdrop-filter: blur(14px);
}

.brand {
  color: var(--text);
  font: 600 22px/1 "Barlow Condensed", sans-serif;
  letter-spacing: .16em;
  text-decoration: none;
}

.nav nav { display: flex; gap: clamp(16px, 2.5vw, 34px); }

.nav nav a {
  color: var(--muted);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .11em;
  text-decoration: none;
  text-transform: uppercase;
}

.nav nav a:hover,
.nav nav a.active { color: var(--text); }

main {
  width: min(1180px, calc(100% - 40px));
  margin: auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, .72fr);
  gap: clamp(40px, 8vw, 110px);
  align-items: end;
  padding: clamp(68px, 10vw, 132px) 0 58px;
  border-bottom: 1px solid var(--line);
  text-align: left;
}

.eyebrow {
  grid-column: 1 / -1;
  margin: 0 0 -18px;
  color: var(--mint);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .18em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  font: 600 clamp(76px, 12vw, 156px)/.78 "Barlow Condensed", sans-serif;
  letter-spacing: -.035em;
  text-transform: uppercase;
}

.hero h1 span {
  color: transparent;
  -webkit-text-stroke: 1px #626868;
}

.hero > p:not(.eyebrow) {
  margin: 0;
  color: #a9afae;
  font-size: clamp(15px, 1.5vw, 19px);
  line-height: 1.75;
}

.status {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--line);
  background: rgba(255,255,255,.02);
}

.status span {
  position: relative;
  padding: 15px 16px 15px 31px;
  border-right: 1px solid var(--line);
  color: var(--muted);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: .09em;
  text-transform: uppercase;
}

.status span:last-child { border-right: 0; }

.status span::before {
  position: absolute;
  top: 50%;
  left: 15px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--mint);
  box-shadow: 0 0 10px rgba(121,216,196,.55);
  content: "";
  transform: translateY(-50%);
}

.status span:nth-last-child(-n+2)::before {
  background: #747b7a;
  box-shadow: none;
}

.chat {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 270px;
  margin: 56px 0 0;
  border: 1px solid var(--line-light);
  background: var(--surface);
  box-shadow: 0 35px 100px rgba(0,0,0,.35);
}

.messages {
  grid-column: 1;
  min-height: 390px;
  max-height: 58vh;
  padding: clamp(22px, 4vw, 42px);
  overflow: auto;
  border-right: 1px solid var(--line);
}

.message {
  width: min(680px, 90%);
  margin: 0 0 24px;
  padding: 0 0 20px 18px;
  border-bottom: 1px solid var(--line);
  border-left: 2px solid var(--mint);
}

.message.user {
  margin-left: auto;
  border-left-color: var(--violet);
}

.message strong {
  color: var(--mint);
  font-size: 9px;
  letter-spacing: .15em;
  text-transform: uppercase;
}

.message.user strong { color: var(--violet); }

.message p {
  margin: 7px 0 0;
  color: #d8dcdb;
  white-space: pre-wrap;
}

.answer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 13px;
}

.answer-links a {
  color: var(--metal);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: .08em;
  text-decoration: underline;
  text-underline-offset: 4px;
  text-transform: uppercase;
}

.suggestions {
  grid-column: 2;
  grid-row: 1;
  display: grid;
  align-content: start;
  padding: 22px;
  background: var(--surface-2);
}

.suggestions::before {
  margin-bottom: 13px;
  color: #686f6e;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  content: "Suggested queries";
}

.suggestions button {
  padding: 14px 0;
  border: 0;
  border-bottom: 1px solid var(--line);
  color: #abb1b0;
  background: transparent;
  font: 500 12px/1.45 "Archivo", sans-serif;
  text-align: left;
  cursor: pointer;
}

.suggestions button:hover { color: var(--mint); }

form {
  grid-column: 1 / -1;
  display: flex;
  min-height: 66px;
  border-top: 1px solid var(--line-light);
}

input {
  min-width: 0;
  flex: 1;
  padding: 0 22px;
  border: 0;
  outline: 0;
  color: var(--text);
  background: #0b0d0d;
  font: 500 14px "Archivo", sans-serif;
}

input:focus { box-shadow: inset 0 0 0 1px var(--mint); }

form button {
  min-width: 132px;
  border: 0;
  color: #07100f;
  background: var(--mint);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  cursor: pointer;
}

form button:hover { background: #91e2d1; }

.busy button { opacity: .5; }

.safety {
  grid-column: 1 / -1;
  margin: 0;
  padding: 15px 22px;
  border-top: 1px solid var(--line);
  color: #6f7675;
  background: #0b0d0d;
  font-size: 9px;
  letter-spacing: .03em;
}

footer {
  display: grid;
  grid-template-columns: 1fr auto;
  width: min(1180px, calc(100% - 40px));
  margin: 28px auto 54px;
  color: #666d6c;
  font-size: 9px;
  letter-spacing: .1em;
  text-transform: uppercase;
}

footer a { color: var(--metal); text-decoration: none; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
}

@media (max-width: 980px) {
  .nav { min-height: 64px; padding: 14px 20px; }
  .nav nav { gap: 12px; }
  .nav nav a { font-size: 9px; }
  main { width: min(100% - 28px, 1180px); }
  .hero { grid-template-columns: 1fr; gap: 24px; padding: 64px 0 38px; }
  .eyebrow, .status { grid-column: 1; }
  .hero h1 { font-size: clamp(72px, 23vw, 108px); }
  .status { grid-template-columns: 1fr 1fr; }
  .status span:nth-child(2) { border-right: 0; }
  .status span:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .chat { grid-template-columns: 1fr; margin-top: 32px; }
  .messages { grid-column: 1; min-height: 350px; border-right: 0; }
  .suggestions { grid-column: 1; grid-row: 2; border-top: 1px solid var(--line); }
  form { grid-column: 1; }
  form button { min-width: 88px; }
}

@media (max-width: 520px) {
  .brand { font-size: 18px; }
  .nav nav { gap: 9px; }
  .nav nav a { font-size: 8px; letter-spacing: .07em; }
  .hero h1 { font-size: clamp(62px, 22vw, 92px); }
  .status { grid-template-columns: 1fr; }
  .status span { border-right: 0; border-bottom: 1px solid var(--line); }
  .status span:last-child { border-bottom: 0; }
}