@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url('assets/fonts/inter-var-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Instrument Serif';
  font-style: italic;
  font-weight: 400;
  font-display: swap;
  src: url('assets/fonts/instrument-serif-italic-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'Geist Mono';
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url('assets/fonts/geist-mono-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

:root {
  color-scheme: dark;

  --void:        #07090c;
  --basin:       #0c1017;
  --shelf:       #12171f;
  --shelf-edge:  #1a212b;

  --ink:         #eef2f7;
  --ink-soft:    #a8b2c2;
  --ink-faint:   #6b7688;
  --rule:        #1e2632;
  --rule-strong: #2a3543;

  --signal:      #5ee2c8;
  --signal-deep: #1fb598;
  --signal-soft: rgba(94, 226, 200, 0.10);

  --pos:  #5ee2c8;
  --neg:  #ff6b8a;
  --warn: #f5b843;

  --p-chatgpt:     #10a37f;
  --p-claude:      #d97757;
  --p-gemini:      #4285f4;
  --p-perplexity:  #20808d;
  --p-grok:        #c8c8ce;
  --p-aioverviews: #4285f4;

  --lift-1: 0 12px 32px -8px rgba(0,0,0,0.5), 0 2px 4px rgba(0,0,0,0.3);
  --lift-2: 0 30px 60px -20px rgba(0,0,0,0.6);

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'Geist Mono', ui-monospace, 'SF Mono', Menlo, monospace;
  --font-serif: 'Instrument Serif', Georgia, 'Times New Roman', serif;

  --container: 1180px;
  --container-narrow: 720px;
  --nav-h: 64px;

  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-soft: cubic-bezier(0.16, 1, 0.3, 1);
  --t-fast: 180ms;
  --t-med: 320ms;
  --t-slow: 600ms;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  background: var(--void);
  overflow-x: hidden;
  max-width: 100vw;
}

body {
  background: var(--void);
  color: var(--ink-soft);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.65;
  letter-spacing: -0.011em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  max-width: 100vw;
  font-feature-settings: 'cv11', 'ss01';
  font-optical-sizing: auto;
}

body.menu-open { overflow: hidden; }

img, svg { display: block; max-width: 100%; }

::selection { background: var(--signal-soft); color: var(--ink); }

a { color: inherit; text-decoration: none; }

h1, h2, h3, h4, h5, h6 {
  color: var(--ink);
  font-weight: 500;
  line-height: 1.08;
  letter-spacing: -0.028em;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
.container--narrow { max-width: var(--container-narrow); }

.section { padding: 120px 0; position: relative; }
.section--tight { padding: 80px 0; }
.section--basin { background: var(--basin); }
.section--divide { border-top: 1px solid var(--rule); }

.display   { font-size: clamp(44px, 5.8vw, 72px); line-height: 1.04; letter-spacing: -0.035em; font-weight: 500; color: var(--ink); }
.h1        { font-size: clamp(40px, 5.5vw, 64px); line-height: 1.05; letter-spacing: -0.032em; font-weight: 500; color: var(--ink); }
.h2        { font-size: clamp(32px, 4vw, 48px);   line-height: 1.08; letter-spacing: -0.028em; font-weight: 500; color: var(--ink); }
.h3        { font-size: 22px; line-height: 1.25; letter-spacing: -0.02em; font-weight: 500; color: var(--ink); }
.lead      { font-size: 20px; line-height: 1.5; letter-spacing: -0.011em; color: var(--ink-soft); }
.small     { font-size: 14px; line-height: 1.5; color: var(--ink-soft); }
.eyebrow   { font-family: var(--font-mono); font-size: 12px; font-weight: 500; letter-spacing: 0.12em; text-transform: uppercase; color: var(--signal); display: inline-block; margin-bottom: 20px; }
.meta      { font-family: var(--font-mono); font-size: 13px; font-feature-settings: 'tnum' 1; color: var(--ink-faint); letter-spacing: 0; }

.signal-text {
  background: linear-gradient(96deg, var(--signal) 0%, var(--signal-deep) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 11px 20px;
  border: 1px solid transparent;
  border-radius: 0;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: -0.01em;
  cursor: pointer;
  white-space: nowrap;
  transition: background var(--t-fast) var(--ease), color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
.btn svg { width: 14px; height: 14px; transition: transform var(--t-fast) var(--ease); }
.btn:hover svg { transform: translateX(2px); }

.btn--primary { background: var(--signal-deep); color: var(--void); border-color: var(--signal-deep); }
.btn--primary:hover { background: var(--signal); border-color: var(--signal); }

.btn--ghost { background: transparent; color: var(--ink); border-color: var(--rule-strong); }
.btn--ghost:hover { border-color: var(--ink); }

.btn--nav {
  background: transparent;
  color: var(--signal);
  border-color: var(--signal);
  padding: 9px 16px;
}
.btn--nav:hover { background: var(--signal); color: var(--void); }

.btn--large { padding: 16px 28px; font-size: 14px; }
.btn--full { width: 100%; justify-content: center; }

a:focus-visible, button:focus-visible, .btn:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 3px;
}

.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  z-index: 100;
  display: flex;
  align-items: center;
  background: rgba(7, 9, 12, 0.72);
  border-bottom: 1px solid var(--rule);
  -webkit-backdrop-filter: blur(14px) saturate(1.4);
          backdrop-filter: blur(14px) saturate(1.4);
  transition: background var(--t-med) var(--ease), border-color var(--t-med) var(--ease);
}
.nav--scrolled {
  background: rgba(7, 9, 12, 0.88);
  border-bottom-color: var(--rule-strong);
}

.nav__inner {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 40px;
}

.nav__brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  font-weight: 500;
  font-size: 22px;
  letter-spacing: -0.025em;
}
.nav__brand-icon {
  width: 28px; height: 28px;
  color: var(--signal);
  display: inline-flex;
}
.nav__brand-icon svg { width: 100%; height: 100%; }

.nav__links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav__link {
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--ink-soft);
  transition: color var(--t-fast) var(--ease);
}
.nav__link:hover, .nav__link[aria-current="page"] { color: var(--ink); }

.nav__actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 20px;
}
.nav__login {
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--ink-soft);
  transition: color var(--t-fast) var(--ease);
}
.nav__login:hover { color: var(--ink); }

.nav__toggle {
  display: none;
  min-width: 68px;
  height: 40px;
  padding: 0 14px;
  background: transparent;
  border: 1px solid var(--rule-strong);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: -0.01em;
  cursor: pointer;
}
.nav__toggle::before { content: "Menu"; }
.nav__toggle[aria-expanded="true"]::before { content: "Close"; color: var(--signal); }

.nav__mobile {
  position: fixed;
  inset: var(--nav-h) 0 0 0;
  z-index: 99;
  background: var(--void);
  padding: 24px;
  display: none;
  flex-direction: column;
  gap: 4px;
}
.nav__mobile.open { display: flex; }
.nav__mobile a {
  padding: 18px 0;
  border-bottom: 1px solid var(--rule);
  font-size: 20px;
  color: var(--ink);
  font-weight: 500;
}
.nav__mobile .btn { margin-top: 24px; }

@media (max-width: 900px) {
  .nav__links { display: none; }
  .nav__actions .nav__login { display: none; }
  .nav__actions .btn--nav { display: none; }  
  .nav__toggle { display: inline-flex; align-items: center; justify-content: center; }
}

.contour {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
  --cx: 70%;
  --cy: 40%;
}
.contour svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
.contour__base path, .contour__base ellipse { fill: none; stroke: var(--rule-strong); stroke-width: 0.45; vector-effect: non-scaling-stroke; }
.contour__base { opacity: 0.35; }
.contour__signal path, .contour__signal ellipse { fill: none; stroke: var(--signal); stroke-width: 0.5; vector-effect: non-scaling-stroke; }
.contour__signal {
  opacity: 0.22;
  -webkit-mask-image: radial-gradient(320px circle at var(--cx) var(--cy), #000 0%, rgba(0,0,0,0.5) 45%, transparent 72%);
          mask-image: radial-gradient(320px circle at var(--cx) var(--cy), #000 0%, rgba(0,0,0,0.5) 45%, transparent 72%);
}
@media (prefers-reduced-motion: reduce) {
  .contour__signal { display: none; }
}

main, .footer { position: relative; z-index: 1; }
.nav { z-index: 100; }

.footer {
  background: var(--basin);
  border-top: 1px solid var(--rule);
  padding: 72px 24px 0;
}
.footer__inner {
  max-width: var(--container);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.4fr 2fr;
  gap: 56px;
  padding-bottom: 48px;
}
.footer__brand p { color: var(--ink-faint); margin-top: 12px; font-size: 14px; max-width: 320px; }
.footer__socials { margin-top: 20px; display: flex; gap: 10px; }
.footer__socials a {
  width: 36px; height: 36px;
  display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid var(--rule-strong);
  color: var(--ink-faint);
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
.footer__socials a:hover { color: var(--signal); border-color: var(--signal); }
.footer__socials svg { width: 15px; height: 15px; }

.footer__cols { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; }
.footer__col h4 {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink);
  margin-bottom: 18px;
}
.footer__col a {
  display: block;
  font-size: 14px;
  color: var(--ink-faint);
  margin-bottom: 10px;
  transition: color var(--t-fast) var(--ease);
}
.footer__col a:hover { color: var(--ink); }

.footer__bottom {
  max-width: var(--container);
  margin: 0 auto;
  border-top: 1px solid var(--rule);
  padding: 22px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ink-faint);
  text-transform: uppercase;
}
@media (max-width: 900px) {
  .footer__inner { grid-template-columns: 1fr; gap: 40px; }
  .footer__cols { grid-template-columns: 1fr 1fr; }
  .footer__bottom { flex-direction: column; gap: 12px; text-align: center; }
}

.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity var(--t-slow) var(--ease-soft), transform var(--t-slow) var(--ease-soft);
}
.reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}