/* ===================================================================
   Omni — dark / acid-lime theme
   =================================================================== */

:root {
  --bg: #0a0b07;
  --bg-soft: #0e100a;
  --surface: #15170f;
  --surface-2: #1c1f15;
  --surface-border: rgba(255, 255, 255, 0.07);
  --accent: #c6fb3f;
  --accent-dim: rgba(198, 251, 63, 0.14);
  --accent-ink: #10230a;
  --text: #f2f4ea;
  --text-dim: #9aa08e;
  --text-faint: #676d5c;
  --radius-xl: 32px;
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 10px;
  --font-display: "Space Grotesk", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Inter", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "DM Mono", "SFMono-Regular", monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  position: relative;
  overflow-x: hidden;
}

/* subtle grid texture across the whole page, like the reference */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, black 40%, transparent 90%);
}

.grain {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: 0.05;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 700;
  margin: 0;
  letter-spacing: -0.01em;
  color: var(--text);
}
em { font-style: normal; color: var(--accent); }
p { color: var(--text-dim); margin: 0; }
a { color: inherit; text-decoration: none; }

.section-shell {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 40px;
  position: relative;
  z-index: 2;
}

.section-number {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 14px;
}

/* ---------- reveal-on-scroll ---------- */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.in-view { opacity: 1; transform: translateY(0); }
.reveal.delay-1.in-view { transition-delay: 0.1s; }
.reveal.delay-2.in-view { transition-delay: 0.2s; }

/* =========================== HEADER =========================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1120px;
  margin: 20px auto 0;
  padding: 12px 14px 12px 22px;
  background: rgba(15, 17, 10, 0.72);
  backdrop-filter: blur(14px);
  border: 1px solid var(--surface-border);
  border-radius: 999px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.06em;
  font-size: 15px;
}
.brand-mark { color: var(--accent); font-size: 16px; }
.nav-links { display: flex; gap: 30px; }
.nav-links a {
  font-size: 14px;
  color: var(--text-dim);
  transition: color 0.2s ease;
}
.nav-links a:hover { color: var(--text); }
.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 600;
  font-size: 14px;
  padding: 10px 18px;
  border-radius: 999px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.nav-cta:hover { transform: translateY(-1px); box-shadow: 0 8px 24px rgba(198, 251, 63, 0.25); }

/* =========================== HERO =========================== */
.hero {
  display: grid;
  grid-template-columns: 0.86fr 1.14fr;
  gap: 48px;
  align-items: start;
  padding-top: 88px;
  padding-bottom: 60px;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--text-dim);
  background: var(--surface);
  border: 1px solid var(--surface-border);
  padding: 7px 14px;
  border-radius: 999px;
  margin-bottom: 26px;
}
.eyebrow-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 10px var(--accent); }
.hero-copy h1 {
  font-size: 41px;
  line-height: 1.16;
  margin-bottom: 22px;
  white-space: nowrap;
}
.hero-lede {
  font-size: 16.5px;
  max-width: 420px;
  margin-bottom: 32px;
}
.hero-actions { display: flex; align-items: center; gap: 26px; margin-bottom: 36px; flex-wrap: wrap; }
.button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 24px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 14.5px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.button-dark {
  background: var(--accent);
  color: var(--accent-ink);
}
.button-dark:hover { transform: translateY(-2px); box-shadow: 0 10px 28px rgba(198, 251, 63, 0.28); }
.button-light {
  background: var(--text);
  color: var(--bg);
}
.button-light:hover { transform: translateY(-2px); box-shadow: 0 10px 28px rgba(255, 255, 255, 0.15); }
.text-link { font-size: 14px; color: var(--text-dim); display: inline-flex; gap: 6px; }
.text-link:hover { color: var(--text); }
.hero-meta { display: flex; gap: 22px; flex-wrap: wrap; font-family: var(--font-mono); font-size: 12.5px; color: var(--text-faint); }

/* ---- hero collage: app window as focal point, side cards muted ---- */
.hero-collage {
  position: relative;
  height: 580px;
}
.hero-collage::before {
  content: "";
  position: absolute;
  top: 8%;
  right: -6%;
  width: 66%;
  height: 66%;
  background: radial-gradient(circle, rgba(198, 251, 63, 0.2), transparent 70%);
  filter: blur(46px);
  z-index: 0;
  pointer-events: none;
}
.collage-note {
  position: absolute;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--text-faint);
  z-index: 3;
}
.note-top { top: -6px; left: 6px; opacity: 0.7; }
.note-bottom { bottom: -4px; right: 12px; opacity: 0.7; }

.paper {
  position: absolute;
  background: #101208;
  border: 1px solid rgba(255, 255, 255, 0.045);
  border-radius: var(--radius-md);
  padding: 16px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.35);
  opacity: 0.62;
  filter: saturate(0.7);
  transition: opacity 0.3s ease, transform 0.3s ease, filter 0.3s ease;
}
.paper:hover { opacity: 1; filter: saturate(1); transform: translateY(-4px); }
.paper-left {
  top: 44px;
  left: -26px;
  width: 152px;
  z-index: 1;
}
.paper-kicker {
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.1em;
  color: var(--text-faint);
}
.paper-left h3 {
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  margin: 10px 0 8px;
  color: var(--text-dim);
}
.paper-left h3 span { color: var(--text-faint); font-weight: 500; }
.paper-left p { font-size: 11px; line-height: 1.5; color: var(--text-faint); }
.paper-line { display: block; height: 1px; background: var(--surface-border); margin-top: 12px; }

.paper-right {
  bottom: 118px;
  left: -34px;
  width: 120px;
  padding: 10px;
  z-index: 1;
}
.paper-image {
  height: 56px;
  border-radius: var(--radius-sm);
  background: radial-gradient(circle at 30% 30%, #6f7a52, #16210a 70%);
}
.paper-caption { font-size: 10px; color: var(--text-faint); margin-top: 8px; }

.omni-window {
  position: absolute;
  top: -10px;
  right: -16px;
  width: 408px;
  background: linear-gradient(180deg, #161910, #0d0e09);
  border: 1px solid rgba(198, 251, 63, 0.16);
  border-radius: var(--radius-lg);
  box-shadow: 0 40px 90px rgba(0, 0, 0, 0.55), 0 0 80px rgba(198, 251, 63, 0.1), 0 0 0 1px rgba(198, 251, 63, 0.06);
  padding: 18px 18px 22px;
  z-index: 4;
  transition: transform 0.3s ease;
}
.omni-window:hover { transform: translateY(-4px); }
.window-bar { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.window-dots { display: flex; gap: 6px; }
.window-dots i { width: 8px; height: 8px; border-radius: 50%; background: var(--surface-2); display: block; }
.window-model {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-faint);
  background: var(--surface-2);
  padding: 4px 10px;
  border-radius: 999px;
  margin-right: auto;
}
.window-spark { color: var(--accent); }
.window-selection {
  font-size: 13px;
  color: var(--text-dim);
  background: var(--surface-2);
  border-left: 2px solid var(--accent);
  padding: 10px 12px;
  border-radius: 8px;
  margin-bottom: 14px;
}
.window-divider { height: 1px; background: var(--surface-border); margin-bottom: 14px; }
.prompt-stack { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; }
.prompt-row {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 10px;
  padding: 9px 10px;
  cursor: pointer;
  font-family: var(--font-body);
  text-align: left;
  transition: background 0.2s ease, border-color 0.2s ease;
}
.prompt-row:hover { background: var(--surface-2); }
.prompt-row.active { background: var(--accent-dim); border-color: rgba(198, 251, 63, 0.35); }
.prompt-icon { color: var(--accent); font-size: 13px; width: 16px; text-align: center; }
.prompt-row span:nth-child(2) { display: flex; flex-direction: column; flex: 1; }
.prompt-row b { font-size: 13px; color: var(--text); font-weight: 600; }
.prompt-row small { font-size: 11px; color: var(--text-faint); }
.prompt-arrow { color: var(--text-faint); font-size: 12px; }
.prompt-row.active .prompt-arrow { color: var(--accent); }
.window-response {
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--text-dim);
  background: var(--surface-2);
  border-radius: 10px;
  padding: 12px;
}

/* =========================== PROOF STRIP =========================== */
.proof-strip {
  display: flex;
  align-items: center;
  gap: 28px;
  flex-wrap: wrap;
  padding: 28px 40px;
  border-top: 1px solid var(--surface-border);
  border-bottom: 1px solid var(--surface-border);
}
.proof-label { font-family: var(--font-mono); font-size: 12px; color: var(--text-faint); }
.proof-items { display: flex; gap: 26px; flex-wrap: wrap; }
.proof-items span { font-size: 14px; color: var(--text-dim); }

/* =========================== SECTION INTRO =========================== */
.section-intro { max-width: 620px; margin-bottom: 52px; }
.section-intro h2 { font-size: 34px; line-height: 1.2; margin-bottom: 16px; }
.section-intro h2 span { color: var(--text-dim); }
.section-intro p { font-size: 15px; max-width: 460px; }

.how-to-use, .features, .workflow, .use-cases, .download { padding: 100px 40px; }

/* =========================== USAGE CARDS =========================== */
.usage-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.usage-card {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  padding: 20px;
  transition: transform 0.25s ease, border-color 0.25s ease;
}
.usage-card:hover { transform: translateY(-4px); border-color: rgba(198, 251, 63, 0.25); }
.usage-art { border-radius: var(--radius-md); overflow: hidden; margin-bottom: 22px; }
.usage-art svg { display: block; width: 100%; height: auto; }
.usage-number { font-family: var(--font-mono); color: var(--accent); font-size: 13px; margin-bottom: 10px; }
.usage-card h3 { font-size: 18px; margin-bottom: 10px; }
.usage-card p { font-size: 13.5px; }

/* =========================== FEATURE CARDS =========================== */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature-card {
  border-radius: var(--radius-lg);
  padding: 28px;
  min-height: 340px;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--surface-border);
  transition: transform 0.25s ease;
}
.feature-card:hover { transform: translateY(-5px); }
.feature-large, .feature-cream { background: var(--surface); }
.feature-coral {
  background: var(--accent);
  border-color: transparent;
  box-shadow: 0 30px 70px rgba(198, 251, 63, 0.16);
}
.card-index { font-family: var(--font-mono); font-size: 13px; color: var(--text-faint); margin-bottom: 20px; }
.feature-coral .card-index { color: var(--accent-ink); opacity: 0.65; }
.feature-card h3 { font-size: 21px; margin-top: auto; margin-bottom: 10px; }
.feature-coral h3, .feature-coral p { color: var(--accent-ink); }
.feature-card p { font-size: 13.5px; }

.card-visual { height: 120px; display: flex; align-items: center; justify-content: center; position: relative; margin-bottom: 20px; }

.shortcut-visual { gap: 8px; }
.keycap {
  background: var(--surface-2);
  border: 1px solid var(--surface-border);
  border-radius: 10px;
  padding: 12px 16px;
  font-family: var(--font-mono);
  font-size: 16px;
  z-index: 2;
}
.keycap.wide { padding: 12px 22px; }
.plus { color: var(--text-faint); z-index: 2; }
.orbit {
  position: absolute;
  border: 1px dashed rgba(198, 251, 63, 0.3);
  border-radius: 50%;
}
.orbit-a { width: 150px; height: 150px; }
.orbit-b { width: 200px; height: 90px; }

.model-visual { flex-direction: column; align-items: flex-start; gap: 10px; position: relative; }
.model-pill {
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 7px 12px;
  border-radius: 999px;
  background: rgba(16, 35, 10, 0.55);
  color: var(--accent-ink);
  border: 1px solid rgba(16, 35, 10, 0.35);
}
.model-pill.muted { opacity: 0.6; }
.model-pill.ghost { background: transparent; border-style: dashed; opacity: 0.55; }
.model-line { position: absolute; left: 0; right: 0; bottom: -6px; height: 1px; background: rgba(16, 35, 10, 0.2); }

.privacy-visual { flex-direction: column; align-items: flex-start; gap: 8px; }
.privacy-visual span { font-family: var(--font-mono); font-size: 11px; color: var(--accent); letter-spacing: 0.08em; }
.privacy-visual strong { font-family: var(--font-display); font-size: 17px; font-weight: 600; color: var(--text); }
.privacy-visual small { font-family: var(--font-mono); font-size: 10.5px; color: var(--text-faint); }

/* =========================== WORKFLOW =========================== */
.workflow { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 60px; align-items: center; }
.workflow-art { position: relative; height: 320px; }
.workflow-card {
  position: absolute;
  border-radius: var(--radius-lg);
  border: 1px solid var(--surface-border);
  padding: 22px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.card-back { background: var(--surface); width: 220px; height: 150px; top: 10px; left: 0; opacity: 0.7; font-family: var(--font-mono); font-size: 12px; color: var(--text-faint); }
.card-back b { font-size: 22px; color: var(--text-dim); }
.card-mid {
  background: var(--surface-2);
  width: 220px;
  height: 150px;
  top: 60px;
  left: 60px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-dim);
  flex-direction: row;
  align-items: center;
  gap: 10px;
  justify-content: center;
}
.card-front {
  background: var(--accent);
  color: var(--accent-ink);
  width: 240px;
  height: 170px;
  top: 130px;
  left: 120px;
  box-shadow: 0 30px 70px rgba(198, 251, 63, 0.2);
}
.card-front strong { font-family: var(--font-display); font-size: 18px; }
.card-front small { font-family: var(--font-mono); font-size: 11px; opacity: 0.7; }
.mini-spark { font-size: 18px; }
.scribble { position: absolute; bottom: -6px; right: 10px; font-family: var(--font-display); font-style: italic; color: var(--text-faint); font-size: 13px; }
.workflow-copy h2 { font-size: 32px; margin-bottom: 18px; }
.workflow-lede { font-size: 14.5px; max-width: 400px; margin-bottom: 34px; line-height: 1.6; }
.steps { display: flex; flex-direction: column; gap: 22px; margin-bottom: 40px; }
.step { display: flex; gap: 16px; align-items: flex-start; }
.step-badge {
  flex: none;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 1px solid rgba(198, 251, 63, 0.3);
  background: var(--accent-dim);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.step b { font-size: 15.5px; color: var(--text); display: block; margin-bottom: 4px; }
.step small { font-size: 13px; color: var(--text-dim); }

.workflow-stats {
  display: flex;
  gap: 28px;
  padding-top: 26px;
  border-top: 1px solid var(--surface-border);
}
.stat { display: flex; flex-direction: column; gap: 4px; }
.stat b { font-family: var(--font-display); font-size: 24px; color: var(--accent); font-weight: 700; }
.stat span { font-family: var(--font-mono); font-size: 11.5px; color: var(--text-faint); }

/* =========================== USE CASES =========================== */
.case-masonry { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.case-card {
  background: var(--surface);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-lg);
  padding: 26px;
  min-height: 260px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform 0.25s ease;
}
.case-card:hover { transform: translateY(-5px); }
.case-tag { font-family: var(--font-mono); font-size: 11px; color: var(--accent); letter-spacing: 0.08em; margin-bottom: 18px; }
.case-card h3 { font-size: 19px; margin-bottom: 10px; }
.case-card p { font-size: 13.5px; }
.case-quote { margin-top: auto; padding-top: 20px; font-size: 12.5px; color: var(--text-faint); font-style: italic; }
.case-blue { background: linear-gradient(160deg, #171c11, #10120b); }
.case-yellow { background: var(--accent); }
.case-yellow h3, .case-yellow p, .case-yellow .case-tag { color: var(--accent-ink); }
.case-symbol { margin-top: auto; font-family: var(--font-mono); font-size: 22px; color: var(--accent-ink); opacity: 0.6; }
.case-photo { overflow: hidden; }
.photo-lines { position: absolute; top: 0; right: 0; width: 60%; height: 100%; opacity: 0.5; }
.photo-lines span { position: absolute; right: 0; width: 200%; height: 1px; background: var(--surface-border); }
.photo-lines span:nth-child(1) { top: 30%; transform: rotate(20deg); }
.photo-lines span:nth-child(2) { top: 55%; transform: rotate(20deg); }
.photo-lines span:nth-child(3) { top: 80%; transform: rotate(20deg); }

/* =========================== DOWNLOAD =========================== */
.download-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  flex-wrap: wrap;
  background: linear-gradient(135deg, #171c10, #0c0d08);
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-xl);
  padding: 56px;
}
.download-inner h2 { font-size: 32px; margin: 10px 0 12px; }
.download-inner p { font-size: 14px; }

/* =========================== FOOTER =========================== */
.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  padding: 40px;
  border-top: 1px solid var(--surface-border);
  font-size: 13px;
  color: var(--text-faint);
}
.site-footer .brand { font-size: 14px; }
.site-footer p { color: var(--text-faint); }

/* =========================== RESPONSIVE =========================== */
@media (max-width: 980px) {
  .hero { grid-template-columns: 1fr; padding-top: 140px; }
  .hero-collage { height: 620px; margin-top: 20px; }
  .usage-grid, .feature-grid, .case-masonry { grid-template-columns: 1fr; }
  .workflow { grid-template-columns: 1fr; }
  .workflow-art { margin-bottom: 30px; }
  .nav-links { display: none; }
  .site-header { margin: 12px 16px 0; }
}

@media (max-width: 620px) {
  .section-shell { padding: 0 20px; }
  .how-to-use, .features, .workflow, .use-cases, .download { padding: 70px 20px; }
  .hero-copy h1 { font-size: 34px; }
  .omni-window { position: static; width: 100%; margin-top: 40px; }
  .paper-left, .paper-right { display: none; }
  .hero-collage { height: auto; }
  .download-inner { padding: 34px; }
}

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}