/* ===========================================================
   Upsilon Research — landing page
   Light, editorial. Serif display + grotesk UI + mono data.
   =========================================================== */

:root{
  /* surfaces */
  --paper:       #FBF9F6;
  --paper-tint:  #F4EFE7;
  --white:       #FFFFFF;

  /* ink */
  --ink:         #10161C;
  --ink-soft:    #2B343D;
  --muted:       #5F6B76;

  /* lines */
  --line:        #E5DED2;
  --line-strong: #D5CBBA;

  /* accent */
  --accent:      #9E1B3D;
  --accent-dark: #7C1430;
  --accent-wash: #FBEFF2;
  --ok:          #0E6B55;

  /* type */
  --serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --sans:  "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --mono:  "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  /* layout */
  --shell: 1180px;
  --gutter: 24px;
  --radius: 10px;
  --radius-sm: 6px;

  --shadow-sm: 0 1px 2px rgba(16,22,28,.04), 0 1px 1px rgba(16,22,28,.03);
  --shadow-md: 0 12px 32px -12px rgba(16,22,28,.14), 0 2px 6px rgba(16,22,28,.04);
}

*,*::before,*::after{ box-sizing:border-box; }

html{ -webkit-text-size-adjust:100%; scroll-behavior:smooth; }
@media (prefers-reduced-motion:reduce){ html{ scroll-behavior:auto; } }

body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

img,svg{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }

.shell{ width:100%; max-width:var(--shell); margin-inline:auto; padding-inline:var(--gutter); }

.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;
}
.skip-link{
  position:absolute; left:-9999px; top:0; z-index:100;
  background:var(--ink); color:#fff; padding:10px 16px; border-radius:0 0 var(--radius-sm) 0;
}
.skip-link:focus{ left:0; }

:focus-visible{ outline:2px solid var(--accent); outline-offset:2px; border-radius:3px; }

/* ── type scale ───────────────────────────────────────────── */
.display{
  font-family:var(--serif);
  font-weight:500;
  font-size:clamp(2.5rem, 5.6vw, 4.1rem);
  line-height:1.04;
  letter-spacing:-.022em;
  margin:0 0 20px;
}
.display em{
  font-style:italic;
  color:var(--accent);
  display:block;
}
.display-sm{
  font-family:var(--serif);
  font-weight:500;
  font-size:clamp(1.7rem, 3.1vw, 2.5rem);
  line-height:1.12;
  letter-spacing:-.018em;
  margin:0 0 14px;
}
.lede{
  font-size:clamp(1.02rem, 1.35vw, 1.175rem);
  line-height:1.62;
  color:var(--ink-soft);
  max-width:40ch;
  margin:0 0 30px;
}
.section-lede{ color:var(--muted); max-width:56ch; margin:0; font-size:1.0rem; }
.micro{ font-size:.78rem; line-height:1.5; }
.muted{ color:var(--muted); }
.mono{ font-family:var(--mono); font-feature-settings:"tnum" 1; letter-spacing:-.01em; }
.ok{ color:var(--ok); }

.eyebrow{
  display:inline-flex; align-items:center; gap:8px;
  font-size:.72rem; font-weight:600; letter-spacing:.13em; text-transform:uppercase;
  color:var(--accent);
  margin:0 0 18px;
}
.pulse{
  width:7px; height:7px; border-radius:50%;
  background:var(--accent);
  box-shadow:0 0 0 0 rgba(158,27,61,.45);
  animation:pulse 2.4s ease-out infinite;
}
@keyframes pulse{
  0%{ box-shadow:0 0 0 0 rgba(158,27,61,.4); }
  70%{ box-shadow:0 0 0 7px rgba(158,27,61,0); }
  100%{ box-shadow:0 0 0 0 rgba(158,27,61,0); }
}
@media (prefers-reduced-motion:reduce){ .pulse{ animation:none; } }

/* ── buttons ──────────────────────────────────────────────── */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  font-family:var(--sans); font-size:.92rem; font-weight:500; line-height:1;
  padding:14px 22px; border-radius:var(--radius-sm); border:1px solid transparent;
  cursor:pointer; white-space:nowrap;
  transition:background-color .16s ease, color .16s ease, border-color .16s ease, transform .16s ease;
}
.btn-sm{ padding:10px 16px; font-size:.86rem; }
.btn-primary{ background:var(--ink); color:#fff; }
.btn-primary:hover{ background:var(--accent); }
.btn-primary:active{ transform:translateY(1px); }

/* ── header ───────────────────────────────────────────────── */
.site-header{
  position:sticky; top:0; z-index:50;
  background:rgba(251,249,246,.86);
  backdrop-filter:saturate(150%) blur(10px);
  border-bottom:1px solid transparent;
  transition:border-color .2s ease, box-shadow .2s ease;
}
.site-header.is-stuck{ border-bottom-color:var(--line); box-shadow:0 1px 0 rgba(16,22,28,.02); }

.header-inner{ display:flex; align-items:center; gap:24px; height:68px; }

.brand{ display:inline-flex; align-items:center; gap:10px; margin-right:auto; }
.brand-mark{
  display:grid; place-items:center;
  width:36px; height:36px; border-radius:9px;
  background:var(--ink); color:#fff;
  font-family:var(--serif); font-size:1.39rem; line-height:1;
}
.brand-text{ font-weight:600; font-size:1.2rem; letter-spacing:-.015em; }
/* nbsp keeps the words unbreakable; the negative margin tightens the visual gap. */
.brand-text-light{ font-weight:400; color:#454F59; margin-left:-.16em; }

.nav{ display:flex; gap:28px; }
.nav a{ font-size:.92rem; color:var(--ink-soft); position:relative; padding:4px 0; }
.nav a::after{
  content:""; position:absolute; left:0; right:100%; bottom:0; height:1px;
  background:var(--accent); transition:right .2s ease;
}
.nav a:hover{ color:var(--ink); }
.nav a:hover::after{ right:0; }

.header-actions{ display:flex; align-items:center; gap:12px; }

.nav-toggle{
  display:none; width:38px; height:38px; border:1px solid var(--line-strong);
  border-radius:var(--radius-sm); background:transparent; cursor:pointer;
  padding:11px 9px; flex-direction:column; justify-content:space-between;
}
.nav-toggle span{ display:block; height:1.5px; background:var(--ink); transition:transform .2s ease, opacity .2s ease; }
.nav-toggle[aria-expanded="true"] span:first-child{ transform:translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:last-child{ transform:translateY(-6px) rotate(-45deg); }

.mobile-nav{
  display:none; flex-direction:column; gap:4px;
  padding:8px var(--gutter) 20px;
  border-top:1px solid var(--line);
  background:var(--paper);
}
.mobile-nav a{ padding:12px 0; font-size:1rem; border-bottom:1px solid var(--line); }
.mobile-nav .btn{ margin-top:14px; border-bottom:0; }

/* ── hero ─────────────────────────────────────────────────── */
.hero{ padding-top:clamp(48px, 7vw, 92px); position:relative; overflow:hidden; }
.hero::before{
  content:""; position:absolute; inset:0 0 auto 0; height:620px; z-index:-1;
  background:
    radial-gradient(900px 420px at 78% -8%, var(--accent-wash) 0%, transparent 62%),
    radial-gradient(700px 360px at 8% 0%, #F3EFE6 0%, transparent 60%);
}
.hero-grid{
  display:grid; grid-template-columns:1.08fr .92fr; gap:clamp(32px, 5vw, 72px);
  align-items:center; padding-bottom:clamp(48px, 6vw, 80px);
}
.hero-copy{ min-width:0; }

/* signup */
.signup{ display:flex; flex-wrap:wrap; gap:10px; max-width:470px; margin:0 0 26px; }
.signup input[type="email"]{
  flex:1 1 220px; min-width:0;
  font-family:var(--sans); font-size:.95rem; color:var(--ink);
  padding:14px 16px; background:var(--white);
  border:1px solid var(--line-strong); border-radius:var(--radius-sm);
  transition:border-color .16s ease, box-shadow .16s ease;
}
.signup input::placeholder{ color:#9AA3AC; }
.signup input:focus{ outline:none; border-color:var(--ink); box-shadow:0 0 0 3px rgba(16,22,28,.07); }
.signup input[aria-invalid="true"]{ border-color:var(--accent); }
.signup-note{ flex:1 0 100%; margin:2px 0 0; font-size:.78rem; color:var(--muted); }
.signup-note.is-ok{ color:var(--ok); font-weight:500; }
.signup-note.is-err{ color:var(--accent); font-weight:500; }
.signup-note a{ text-decoration:underline; }
.signup-lg{ margin-inline:auto; }

.coverage-pills{
  display:flex; flex-wrap:wrap; gap:8px; list-style:none; padding:0; margin:0;
}
.coverage-pills li{
  font-size:.76rem; color:var(--ink-soft); background:var(--white);
  border:1px solid var(--line); border-radius:999px; padding:6px 13px;
}

/* hero visual */
.hero-visual{ min-width:0; }
.card{
  background:var(--white);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow-sm);
}
.report-preview{ padding:22px; box-shadow:var(--shadow-md); }
.report-head{ display:flex; align-items:center; justify-content:space-between; gap:12px; margin-bottom:14px; }
.tag{
  display:inline-block; font-size:.68rem; font-weight:500; letter-spacing:.06em; text-transform:uppercase;
  padding:4px 9px; border-radius:4px; background:var(--paper-tint); color:var(--ink-soft);
}
.tag-accent{ background:var(--accent-wash); color:var(--accent); }
.section-tint .tag{ background:var(--white); border:1px solid var(--line); }
.report-head .micro{ color:var(--muted); }
.report-title{
  font-family:var(--serif); font-weight:500; font-size:1.28rem; line-height:1.22;
  letter-spacing:-.012em; margin:0 0 6px;
}
.report-meta{ color:var(--muted); margin:0 0 18px; }

.spark{ width:100%; height:96px; margin-bottom:18px; }
.spark .grid line{ stroke:var(--line); stroke-width:1; stroke-dasharray:2 4; }
.spark-line{ stroke:var(--accent); stroke-width:1.75; stroke-linejoin:round; }
.spark-dot{ fill:var(--accent); }

.report-stats{
  display:grid; grid-template-columns:repeat(3,1fr); gap:14px;
  margin:0; padding-top:16px; border-top:1px solid var(--line);
}
.report-stats dt{ font-size:.68rem; letter-spacing:.07em; text-transform:uppercase; color:var(--muted); margin-bottom:4px; }
.report-stats dd{ margin:0; font-size:.86rem; }
.report-foot{ margin:16px 0 0; color:var(--muted); }

/* ── ticker ───────────────────────────────────────────────── */
.ticker{
  border-top:1px solid var(--line); border-bottom:1px solid var(--line);
  background:var(--white); overflow:hidden; padding:11px 0;
}
.ticker-track{
  display:flex; gap:40px; width:max-content;
  animation:marquee 46s linear infinite;
}
.ticker-track span{ font-size:.76rem; color:var(--muted); white-space:nowrap; }
.ticker-track span.mono{ color:var(--accent); letter-spacing:.14em; font-size:.7rem; }
@keyframes marquee{ from{ transform:translateX(0); } to{ transform:translateX(-50%); } }
@media (prefers-reduced-motion:reduce){ .ticker-track{ animation:none; } }

/* ── sections ─────────────────────────────────────────────── */
.section{ padding:clamp(64px, 8vw, 104px) 0; }
.section-tint{ background:var(--paper-tint); border-block:1px solid var(--line); }
.section-ink{
  background:
    radial-gradient(600px 300px at 50% 0%, #F7F2EA 0%, transparent 70%),
    var(--paper);
  border-top:1px solid var(--line);
}
.section-head{ margin-bottom:clamp(32px, 4vw, 52px); max-width:62ch; }
.section-head-row{
  display:flex; flex-wrap:wrap; gap:20px 48px; align-items:flex-end;
  justify-content:space-between; max-width:none;
}
.section-head-row .section-lede{ max-width:44ch; }

.grid-4{ display:grid; grid-template-columns:repeat(4,1fr); gap:18px; }

/* desks */
.desk{ padding:24px 22px 26px; display:flex; flex-direction:column; }
.desk-num{ font-size:.72rem; color:var(--accent); letter-spacing:.1em; }
.desk h3{
  font-family:var(--serif); font-weight:500; font-size:1.3rem; line-height:1.2;
  letter-spacing:-.012em; margin:10px 0 10px;
}
.desk p{ margin:0 0 18px; font-size:.91rem; color:var(--muted); line-height:1.58; }
.checks{ list-style:none; margin:auto 0 0; padding:16px 0 0; border-top:1px solid var(--line); }
.checks li{
  position:relative; padding-left:18px; font-size:.84rem; color:var(--ink-soft); margin-bottom:7px;
}
.checks li:last-child{ margin-bottom:0; }
.checks li::before{
  content:""; position:absolute; left:0; top:.55em;
  width:7px; height:7px; border-radius:2px; background:var(--accent); opacity:.55;
}

/* pipeline */
.pipeline{ list-style:none; margin:0 0 18px; padding:0; border-top:1px solid var(--line-strong); }
.pipeline li{
  display:grid; grid-template-columns:84px 1fr auto 86px; align-items:center; gap:18px;
  padding:19px 4px; border-bottom:1px solid var(--line-strong);
  transition:background-color .16s ease;
}
.pipeline li:hover{ background:rgba(255,255,255,.6); }
.pipeline-id{ font-size:.78rem; color:var(--accent); }
.pipeline-title{ font-family:var(--serif); font-size:1.12rem; line-height:1.3; letter-spacing:-.01em; }
.pipeline-status{ font-size:.76rem; color:var(--muted); text-align:right; }

/* tooling */
.tooling-grid{
  display:grid; grid-template-columns:1fr 1.02fr; gap:clamp(32px, 5vw, 64px); align-items:start;
}
.tooling-grid .section-lede{ margin-bottom:34px; }
.tool-list{ display:grid; grid-template-columns:repeat(2,1fr); gap:26px 28px; }
.tool h3{
  font-size:.95rem; font-weight:600; margin:0 0 7px; padding-top:13px;
  border-top:2px solid var(--ink);
}
.tool p{ margin:0; font-size:.87rem; color:var(--muted); line-height:1.55; }

/* terminal */
.terminal{ overflow:hidden; padding:0 0 16px; }
.terminal-bar{
  display:flex; align-items:center; gap:7px;
  padding:11px 16px; border-bottom:1px solid var(--line); background:var(--paper);
}
.terminal-bar .dot{ width:9px; height:9px; border-radius:50%; background:var(--line-strong); }
.terminal-bar .micro{ margin-left:8px; color:var(--muted); }
.terminal-body{
  margin:0; padding:20px 18px 6px;
  font-size:.8rem; line-height:1.85; color:var(--ink-soft);
  overflow-x:auto; white-space:pre;
}
.c-prompt{ color:var(--accent); }
.c-dim{ color:var(--muted); }
.c-ok{ color:var(--ok); font-weight:500; }
.terminal .report-foot{ padding-inline:18px; }

/* gates */
.gates .gate{
  background:var(--white); border:1px solid var(--line); border-radius:var(--radius);
  padding:24px 22px; box-shadow:var(--shadow-sm);
}
.gate-id{
  display:inline-block; font-size:.68rem; letter-spacing:.1em; text-transform:uppercase;
  color:var(--accent); background:var(--accent-wash); padding:4px 8px; border-radius:4px;
}
.gate h3{ font-family:var(--serif); font-weight:500; font-size:1.22rem; margin:14px 0 8px; letter-spacing:-.01em; }
.gate p{ margin:0; font-size:.88rem; color:var(--muted); line-height:1.58; }

/* faq */
.faq-grid{ display:grid; grid-template-columns:.8fr 1.2fr; gap:clamp(28px, 5vw, 64px); align-items:start; }
.faq-grid .section-head{ margin-bottom:0; }
.faq-list{ border-top:1px solid var(--line-strong); }
.faq-list details{ border-bottom:1px solid var(--line-strong); }
.faq-list summary{
  display:flex; align-items:center; justify-content:space-between; gap:16px;
  padding:19px 2px; cursor:pointer; list-style:none;
  font-size:1rem; font-weight:500; color:var(--ink);
}
.faq-list summary::-webkit-details-marker{ display:none; }
.faq-list summary::after{
  content:"+"; font-family:var(--mono); font-size:1.1rem; color:var(--accent); flex:0 0 auto;
  transition:transform .2s ease;
}
.faq-list details[open] summary::after{ content:"−"; }
.faq-list summary:hover{ color:var(--accent); }
.faq-list details p{
  margin:-4px 0 20px; padding-right:40px;
  font-size:.92rem; color:var(--muted); line-height:1.62; max-width:62ch;
}

/* cta */
.cta{
  background:var(--paper-tint); border-top:1px solid var(--line);
  padding:clamp(64px, 8vw, 100px) 0;
}
.cta-inner{ text-align:center; max-width:720px; margin-inline:auto; }
.cta-inner .section-lede{ margin:0 auto 30px; }
.cta-inner .display-sm{ max-width:22ch; margin-inline:auto; }
.signup-lg{ max-width:520px; }
.signup-lg .signup-note{ text-align:center; }

/* ── 404 ──────────────────────────────────────────────────── */
.notfound{
  display:grid; place-items:center; text-align:center;
  padding:clamp(80px, 13vw, 160px) 0;
}
.notfound-inner{ max-width:50ch; }
.notfound .display-sm{ margin-bottom:14px; }
.notfound .section-lede{ margin:0 auto 30px; }
.notfound-links{
  display:flex; flex-wrap:wrap; gap:12px 26px; justify-content:center;
  list-style:none; padding:0; margin:30px 0 0;
}
.notfound-links a{
  font-size:.89rem; color:var(--ink-soft);
  border-bottom:1px solid var(--line-strong); padding-bottom:2px;
  transition:color .16s ease, border-color .16s ease;
}
.notfound-links a:hover{ color:var(--accent); border-color:var(--accent); }
.notfound-code{
  display:block; margin-top:40px;
  font-family:var(--mono); font-size:.7rem; letter-spacing:.16em; color:var(--muted);
}

/* footer */
.site-footer{ background:var(--white); border-top:1px solid var(--line); padding:clamp(44px,5vw,64px) 0 28px; }
.footer-grid{
  display:grid; grid-template-columns:1.6fr repeat(3,1fr); gap:32px;
  padding-bottom:36px; border-bottom:1px solid var(--line);
}
.footer-brand .brand{ margin-bottom:12px; }
.footer-brand p{ max-width:28ch; }
.footer-col{ display:flex; flex-direction:column; gap:9px; }
.footer-col h2{
  font-size:.7rem; font-weight:600; letter-spacing:.12em; text-transform:uppercase;
  color:var(--muted); margin:0 0 4px;
}
.footer-col a{ font-size:.88rem; color:var(--ink-soft); }
.footer-col a:hover{ color:var(--accent); }
.footer-base{
  display:flex; flex-wrap:wrap; gap:14px 40px; justify-content:space-between;
  padding-top:24px;
}
.footer-base .disclaimer{ max-width:72ch; }

/* ── responsive ───────────────────────────────────────────── */
@media (max-width:1020px){
  .grid-4{ grid-template-columns:repeat(2,1fr); }
  .hero-grid{ grid-template-columns:1fr; }
  .hero-visual{ max-width:560px; }
  .lede{ max-width:52ch; }
  .tooling-grid{ grid-template-columns:1fr; }
  .faq-grid{ grid-template-columns:1fr; }
  .footer-grid{ grid-template-columns:1fr 1fr; }
}
@media (max-width:760px){
  .nav{ display:none; }
  .nav-toggle{ display:flex; }
  .site-header.is-open .mobile-nav{ display:flex; }
  .header-actions .btn-primary{ display:none; }
  .pipeline li{ grid-template-columns:1fr auto; gap:6px 14px; padding:17px 2px; }
  .pipeline-id{ order:1; }
  .pipeline-status{ order:2; }
  .pipeline-title{ order:4; grid-column:1 / -1; font-size:1.05rem; }
  .pipeline .tag{ order:3; grid-column:1 / -1; justify-self:start; }
}
@media (max-width:560px){
  :root{ --gutter:18px; }
  .grid-4{ grid-template-columns:1fr; }
  .tool-list{ grid-template-columns:1fr; gap:22px; }
  .report-stats{ grid-template-columns:1fr 1fr; }
  .footer-grid{ grid-template-columns:1fr; gap:26px; }
  .signup input[type="email"]{ flex-basis:100%; }
  .signup .btn{ width:100%; }
}