/* ResearchOS site — dark, modern dev-tool landing aesthetics.
   Fluid type, sticky blur nav, glow accents, scroll reveals. */
@font-face { font-family: 'Inter'; src: url('assets/Inter-Regular.ttf'); font-weight: 400; font-display: swap; }
@font-face { font-family: 'Inter'; src: url('assets/Inter-SemiBold.ttf'); font-weight: 600; font-display: swap; }
@font-face { font-family: 'Inter'; src: url('assets/Inter-Bold.ttf'); font-weight: 700; font-display: swap; }

:root {
  --bg: #0B0D13; --bg2: #0F1117; --surface: #151A2B; --surface2: #1B2138;
  --border: #232A47; --border2: #2E3860;
  --text: #EDEBF2; --muted: #97A0B5; --faint: #6B7490;
  --indigo: #6366F1; --indigo2: #818CF8; --green: #34D399;
  --amber: #FBBF24; --blue: #60A5FA; --pink: #F472B6;
  --teal: #2DD4BF; --red: #F87171;
  --radius: 18px;
  --shadow-lg: 0 24px 80px rgba(0,0,0,.55);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg); color: var(--text);
  font-family: 'Inter', system-ui, sans-serif;
  line-height: 1.65; font-size: 16px;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
::selection { background: rgba(99,102,241,.35); }
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; display: block; }
code, pre, kbd {
  font-family: ui-monospace, 'JetBrains Mono', Menlo, monospace;
  font-size: .88em;
}
code { background: var(--surface); border: 1px solid var(--border);
  padding: 2px 7px; border-radius: 7px; }
pre { background: var(--surface); border: 1px solid var(--border);
  border-radius: 14px; padding: 18px 20px; overflow-x: auto;
  margin: 16px 0; line-height: 1.7; }
pre code { background: none; border: none; padding: 0; }
kbd { background: var(--surface); border: 1px solid var(--border2);
  border-bottom-width: 2px; border-radius: 6px; padding: 1px 7px; }

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* ---------- ambient glows ---------- */
.glow {
  position: fixed; pointer-events: none; z-index: 0;
  width: 640px; height: 640px; border-radius: 50%;
  filter: blur(140px); opacity: .16;
}
.glow.g1 { background: var(--indigo); top: -240px; left: -140px; }
.glow.g2 { background: var(--pink); top: 30%; right: -280px; opacity: .10; }
.glow.g3 { background: var(--teal); bottom: -260px; left: 20%; opacity: .08; }
main, header, footer { position: relative; z-index: 1; }

/* ---------- nav ---------- */
nav.top {
  position: sticky; top: 0; z-index: 50;
  background: rgba(11,13,19,.72);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(35,42,71,.7);
}
nav.top .bar {
  max-width: 1120px; margin: 0 auto; padding: 14px 24px;
  display: flex; align-items: center; gap: 12px;
}
nav.top img { width: 32px; height: 32px; border-radius: 9px; }
nav.top .brand { font-weight: 700; font-size: 17px; color: var(--text);
  letter-spacing: -.2px; }
nav.top .links { margin-left: auto; display: flex; gap: 26px;
  align-items: center; }
nav.top .links a { color: var(--muted); font-size: 14.5px;
  transition: color .18s; }
nav.top .links a:hover { color: var(--text); text-decoration: none; }
nav.top .links a.pill {
  color: #fff; background: var(--indigo); padding: 8px 16px;
  border-radius: 10px; font-weight: 600;
  transition: filter .18s, transform .18s;
}
nav.top .links a.pill:hover { filter: brightness(1.12);
  transform: translateY(-1px); }
#menu-toggle, label.burger { display: none; }

/* ---------- hero ---------- */
.hero { text-align: center; padding: clamp(56px, 9vw, 110px) 0 24px; }
.badge {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; color: var(--indigo2); font-weight: 600;
  border: 1px solid rgba(99,102,241,.4); background: rgba(99,102,241,.09);
  padding: 6px 14px; border-radius: 999px; margin-bottom: 26px;
}
.badge .pulse { width: 7px; height: 7px; border-radius: 50%;
  background: var(--green); animation: pulse 2s infinite; }
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(52,211,153,.5); }
  50% { box-shadow: 0 0 0 6px rgba(52,211,153,0); }
}
.hero h1 {
  font-size: clamp(38px, 6.5vw, 68px); line-height: 1.06;
  letter-spacing: -2.2px; font-weight: 700;
  max-width: 820px; margin: 0 auto 20px;
}
.hero h1 .grad {
  background: linear-gradient(92deg, var(--indigo2), var(--pink) 60%, var(--amber));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero p.tag {
  font-size: clamp(16px, 2.2vw, 19.5px); color: var(--muted);
  max-width: 660px; margin: 0 auto 32px;
}
.cta-row { display: flex; gap: 12px; justify-content: center;
  flex-wrap: wrap; }
.cta {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--indigo); color: #fff; padding: 13px 28px;
  border-radius: 13px; font-weight: 600; font-size: 15.5px;
  box-shadow: 0 8px 30px rgba(99,102,241,.35);
  transition: transform .18s, filter .18s, box-shadow .18s;
}
.cta:hover { text-decoration: none; transform: translateY(-2px);
  filter: brightness(1.1); box-shadow: 0 12px 40px rgba(99,102,241,.45); }
.cta.ghost { background: rgba(255,255,255,.04); color: var(--text);
  border: 1px solid var(--border2); box-shadow: none; }
.cta.ghost:hover { background: rgba(255,255,255,.08); }
.hero .meta { margin-top: 22px; font-size: 13.5px; color: var(--faint); }
.hero .meta code { font-size: .95em; }

/* window-framed screenshot */
.frame {
  max-width: 980px; margin: clamp(36px, 6vw, 64px) auto 0;
  border-radius: var(--radius); border: 1px solid var(--border2);
  background: var(--bg2); box-shadow: var(--shadow-lg);
  overflow: hidden; position: relative;
}
.frame::before {
  content: ""; position: absolute; inset: -1px; z-index: -1;
  border-radius: var(--radius);
  background: linear-gradient(140deg, rgba(99,102,241,.5), transparent 30%,
    transparent 70%, rgba(244,114,182,.35));
  filter: blur(18px); opacity: .55;
}
.frame .chrome {
  display: flex; gap: 7px; padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}
.frame .chrome i { width: 11px; height: 11px; border-radius: 50%;
  background: var(--border2); }
.frame .chrome i:nth-child(1) { background: #F87171aa; }
.frame .chrome i:nth-child(2) { background: #FBBF24aa; }
.frame .chrome i:nth-child(3) { background: #34D399aa; }

/* ---------- sections ---------- */
section { padding: clamp(56px, 8vw, 96px) 0; }
.kicker { font-size: 12.5px; font-weight: 700; letter-spacing: 2.4px;
  text-transform: uppercase; margin-bottom: 12px; }
section h2 { font-size: clamp(26px, 4vw, 38px); letter-spacing: -1px;
  line-height: 1.15; margin-bottom: 14px; max-width: 640px; }
section p.lead { color: var(--muted); max-width: 640px;
  margin-bottom: 34px; font-size: clamp(15px, 1.8vw, 17px); }
section.center { text-align: center; }
section.center h2, section.center p.lead { margin-left: auto;
  margin-right: auto; }

/* pills band */
.pills { display: flex; gap: 12px; flex-wrap: wrap;
  justify-content: center; padding: 6px 0 0; }
.pill-stat {
  border: 1px solid var(--border); background: var(--surface);
  padding: 10px 20px; border-radius: 999px; font-size: 14px;
  color: var(--muted);
}
.pill-stat b { color: var(--text); }

/* alternating feature rows */
.row {
  display: grid; grid-template-columns: 1fr 1.15fr; gap: 48px;
  align-items: center; margin: clamp(40px, 6vw, 72px) 0;
}
.row.flip .txt { order: 2; }
.row .txt h3 { font-size: clamp(20px, 2.6vw, 26px);
  letter-spacing: -.6px; margin-bottom: 10px; }
.row .txt p { color: var(--muted); font-size: 15.5px; }
.row .txt ul { margin: 14px 0 0; padding: 0; list-style: none; }
.row .txt li { color: var(--muted); font-size: 14.5px; margin: 8px 0;
  padding-left: 26px; position: relative; }
.row .txt li::before { content: "✓"; position: absolute; left: 0;
  color: var(--green); font-weight: 700; }
.row .shot-wrap { border-radius: var(--radius);
  border: 1px solid var(--border2); overflow: hidden;
  box-shadow: var(--shadow-lg);
  transition: transform .35s cubic-bezier(.2,.8,.2,1); }
.row .shot-wrap:hover { transform: translateY(-6px) scale(1.012); }

/* card grid */
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card {
  background: linear-gradient(180deg, var(--surface), var(--bg2));
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 26px 24px; position: relative; overflow: hidden;
  transition: transform .25s, border-color .25s, box-shadow .25s;
}
.card:hover { transform: translateY(-5px); border-color: var(--border2);
  box-shadow: 0 18px 50px rgba(0,0,0,.45); }
.card .dot { width: 40px; height: 40px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 19px; margin-bottom: 14px; }
.card h3 { font-size: 16.5px; margin-bottom: 7px; letter-spacing: -.2px; }
.card p { font-size: 14px; color: var(--muted); }

/* security steps */
.steps { max-width: 760px; counter-reset: step; margin-top: 10px; }
.step { display: flex; gap: 20px; padding: 22px 0; position: relative; }
.step + .step { border-top: 1px dashed var(--border); }
.step .n { counter-increment: step; flex: none; width: 38px; height: 38px;
  border-radius: 50%; background: linear-gradient(135deg, var(--indigo), var(--pink));
  color: #fff; display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 15px;
  box-shadow: 0 6px 20px rgba(99,102,241,.35); }
.step .n::before { content: counter(step); }
.step p, .step div { color: var(--muted); font-size: 15px; }
.step strong { color: var(--text); }

/* CTA band */
.band {
  border-radius: 24px; padding: clamp(36px, 6vw, 64px);
  text-align: center; position: relative; overflow: hidden;
  background:
    radial-gradient(600px 300px at 20% 0%, rgba(99,102,241,.22), transparent),
    radial-gradient(600px 300px at 80% 100%, rgba(244,114,182,.14), transparent),
    var(--surface);
  border: 1px solid var(--border2);
}
.band h2 { margin-left: auto; margin-right: auto; }
.band p { color: var(--muted); max-width: 560px; margin: 0 auto 28px; }

footer { border-top: 1px solid var(--border); padding: 44px 0 56px;
  color: var(--faint); font-size: 14px; margin-top: 40px; }
footer .cols { display: flex; gap: 60px; flex-wrap: wrap; }
footer h5 { color: var(--muted); font-size: 12px; letter-spacing: 1.6px;
  text-transform: uppercase; margin-bottom: 10px; }
footer a { display: block; color: var(--faint); margin: 6px 0; }
footer a:hover { color: var(--text); text-decoration: none; }
footer .brandline { display: flex; align-items: center; gap: 10px;
  margin-bottom: 10px; }
footer .brandline img { width: 26px; height: 26px; border-radius: 7px; }

/* ---------- reveal animations ---------- */
.reveal { opacity: 0; transform: translateY(26px);
  transition: opacity .7s ease, transform .7s cubic-bezier(.2,.8,.2,1);
  transition-delay: var(--d, 0s); }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .badge .pulse { animation: none; }
  html { scroll-behavior: auto; }
}

/* ---------- tables ---------- */
table { border-collapse: collapse; width: 100%; margin: 16px 0;
  font-size: 14px; }
th, td { border: 1px solid var(--border); padding: 9px 14px;
  text-align: left; }
th { background: var(--surface); }

/* ---------- docs ---------- */
.docs { display: flex; gap: 44px; padding: 38px 0 90px;
  align-items: flex-start; }
.sidebar { flex: none; width: 232px; position: sticky; top: 82px; }
.sidebar h4 { font-size: 11.5px; letter-spacing: 1.8px;
  color: var(--faint); text-transform: uppercase; margin: 20px 0 8px; }
.sidebar a { display: block; padding: 6px 12px; border-radius: 9px;
  color: var(--muted); font-size: 14px; transition: all .15s; }
.sidebar a:hover { color: var(--text); background: var(--surface);
  text-decoration: none; }
.sidebar a.active { color: var(--indigo2); font-weight: 600;
  background: rgba(99,102,241,.10); }
.content { flex: 1; min-width: 0; max-width: 760px; }
.content h1 { font-size: clamp(28px, 4vw, 36px); letter-spacing: -1px;
  margin-bottom: 8px; }
.content h2 { font-size: 22px; letter-spacing: -.4px; margin: 38px 0 12px;
  padding-top: 8px; }
.content h3 { font-size: 17px; margin: 26px 0 8px; }
.content p, .content li { color: #C6CBD9; font-size: 15.5px; }
.content ul, .content ol { padding-left: 24px; margin: 10px 0; }
.content li { margin: 6px 0; }
.note { border: 1px solid rgba(251,191,36,.35);
  background: rgba(251,191,36,.06); border-left: 3px solid var(--amber);
  padding: 14px 18px; border-radius: 12px; margin: 18px 0;
  font-size: 14.5px; }
.note.green { border-color: rgba(52,211,153,.35);
  border-left-color: var(--green); background: rgba(52,211,153,.06); }

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .grid { grid-template-columns: 1fr 1fr; }
  .row { grid-template-columns: 1fr; gap: 26px; }
  .row.flip .txt { order: 0; }
}
@media (max-width: 640px) {
  .grid { grid-template-columns: 1fr; }
  .docs { flex-direction: column; }
  .sidebar { position: static; width: 100%; }
  .cta-row .cta { width: 100%; justify-content: center; }
  footer .cols { gap: 30px; }

  /* hamburger nav */
  label.burger { display: block; margin-left: auto; cursor: pointer;
    padding: 6px; }
  label.burger span { display: block; width: 22px; height: 2px;
    background: var(--text); margin: 5px 0; border-radius: 2px;
    transition: transform .25s, opacity .25s; }
  nav.top .links {
    display: none; position: absolute; left: 0; right: 0; top: 100%;
    flex-direction: column; align-items: stretch; gap: 0;
    background: rgba(11,13,19,.97); border-bottom: 1px solid var(--border);
    padding: 8px 24px 18px;
  }
  nav.top .links a { padding: 12px 4px; font-size: 16px;
    border-bottom: 1px solid rgba(35,42,71,.5); }
  nav.top .links a.pill { margin-top: 12px; text-align: center;
    border-bottom: none; }
  #menu-toggle:checked ~ .links { display: flex; }
  #menu-toggle:checked ~ label.burger span:nth-child(1) {
    transform: translateY(7px) rotate(45deg); }
  #menu-toggle:checked ~ label.burger span:nth-child(2) { opacity: 0; }
  #menu-toggle:checked ~ label.burger span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg); }
}