:root{
  --bg: #0a0f1a;
  --bg-alt: #0d1526;
  --card: #101c33;
  --card-border: #1c2a45;
  --text: #e7edf7;
  --text-dim: #9db0cc;
  --accent: #38bdf8;
  --accent-2: #fb923c;
  --radius: 14px;
  --header-bg: rgba(10,15,26,0.85);
  --shadow-soft: rgba(0,0,0,0.6);
  --shadow-strong: rgba(0,0,0,0.7);
}
@media (prefers-color-scheme: light){
  :root{
    --bg: #f6f8fb;
    --bg-alt: #eef1f7;
    --card: #ffffff;
    --card-border: #dde3ee;
    --text: #0f1b2d;
    --text-dim: #55607a;
    --accent: #0284c7;
    --accent-2: #ea580c;
    --header-bg: rgba(246,248,251,0.85);
    --shadow-soft: rgba(15,23,42,0.18);
    --shadow-strong: rgba(15,23,42,0.22);
  }
}
*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.5;
}
a{ color: inherit; }
img{ max-width: 100%; height: auto; display: block; }
.wrap{ max-width: 1120px; margin: 0 auto; padding: 0 24px; }

header{
  position: sticky; top: 0; z-index: 20;
  background: var(--header-bg);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--card-border);
}
.nav{ display: flex; align-items: center; justify-content: space-between; padding: 14px 24px; }
.brand{ display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 18px; text-decoration: none; }
.brand img{ width: 28px; height: 28px; border-radius: 7px; }
.nav-links{ display: flex; align-items: center; gap: 28px; }
.nav-links a{ text-decoration: none; color: var(--text-dim); font-size: 15px; font-weight: 600; }
.nav-links a:hover{ color: var(--text); }
.nav-cta{ display:flex; gap: 10px; align-items:center; }

.btn{
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 20px; border-radius: 999px; font-weight: 700; font-size: 15px;
  text-decoration: none; border: 1px solid transparent; white-space: nowrap;
}
.btn-primary{ background: linear-gradient(135deg, var(--accent), #60a5fa); color: #06111f; }
.btn-primary:hover{ filter: brightness(1.08); }
.btn-ghost{ border-color: var(--card-border); color: var(--text); }
.btn-ghost:hover{ border-color: var(--accent); }
.btn-sm{ padding: 8px 16px; font-size: 14px; }

.hero{ padding: 88px 0 40px; text-align: center; }
.eyebrow{
  display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: .04em;
  color: var(--accent); background: rgba(56,189,248,0.1); border: 1px solid rgba(56,189,248,0.3);
  padding: 6px 14px; border-radius: 999px; margin-bottom: 22px;
}
h1{ font-size: 46px; font-weight: 800; line-height: 1.15; margin: 0 0 20px; letter-spacing: -0.02em; }
h1 span{ background: linear-gradient(135deg, var(--accent), var(--accent-2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p.lead{ font-size: 19px; color: var(--text-dim); max-width: 640px; margin: 0 auto 32px; }
.hero-actions{ display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; margin-bottom: 56px; }

.shot{
  border-radius: var(--radius); border: 1px solid var(--card-border);
  box-shadow: 0 30px 80px -20px var(--shadow-soft);
  overflow: hidden;
}
.hero-shot{ position: relative; max-width: 980px; margin: 0 auto 64px; }
.popup-float{
  position: absolute; right: 0; bottom: 0; z-index: 2;
  width: 55%; min-width: 140px; max-width: 300px;
  transform: translate(22%, 20%);
  filter: drop-shadow(0 18px 34px rgba(0,0,0,0.55));
}

section{ padding: 20px 0; }
#features{ padding-bottom: 50px; }
.section-head{ text-align: center; max-width: 640px; padding-top: 20px; margin: 0 auto 5px; }
.section-head h2{ font-size: 32px; font-weight: 800; margin: 0 0 14px; letter-spacing: -0.01em; text-wrap: balance; }
.section-head p{ color: var(--text-dim); font-size: 16px; margin: 0; }

.grid{ display: grid; gap: 20px; }
.grid-features{ grid-template-columns: repeat(3, 1fr); }
.card{
  background: var(--card); border: 1px solid var(--card-border); border-radius: var(--radius);
  padding: 26px;
}
.card .icon{
  width: 40px; height: 40px; border-radius: 10px; display: flex; align-items: center; justify-content: center;
  background: rgba(56,189,248,0.12); color: var(--accent); margin-bottom: 16px; font-size: 20px;
}
.card h3{ font-size: 17px; margin: 0 0 8px; font-weight: 700; }
.card p{ font-size: 14.5px; color: var(--text-dim); margin: 0; }

.card[data-feature]{
  cursor: pointer; position: relative;
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.card[data-feature]:hover, .card[data-feature]:focus-visible{
  transform: translateY(-6px) scale(1.02);
  box-shadow: 0 16px 34px -12px rgba(0,0,0,0.55);
  border-color: var(--accent);
  outline: none;
}
.card[data-feature] .expand-hint{
  display: block; margin-top: 14px; font-size: 13px; font-weight: 700;
  color: var(--accent); opacity: 0; transform: translateY(4px);
  transition: opacity .18s ease, transform .18s ease;
}
.card[data-feature]:hover .expand-hint, .card[data-feature]:focus-visible .expand-hint{
  opacity: 1; transform: translateY(0);
}

.modal-overlay{
  position: fixed; inset: 0; z-index: 100; display: flex; align-items: center; justify-content: center;
  background: rgba(5,8,14,0.72); backdrop-filter: blur(4px);
  padding: 24px;
  opacity: 0; visibility: hidden; transition: opacity .18s ease;
}
.modal-overlay.open{ opacity: 1; visibility: visible; }
.modal{
  background: var(--card); border: 1px solid var(--card-border); border-radius: var(--radius);
  max-width: 480px; width: 100%; padding: 32px; position: relative;
  transform: translateY(12px) scale(0.98); transition: transform .18s ease;
  box-shadow: 0 30px 80px -20px var(--shadow-strong);
}
.modal-overlay.open .modal{ transform: translateY(0) scale(1); }
.modal-close{
  position: absolute; top: 16px; right: 16px; width: 32px; height: 32px; border-radius: 50%;
  background: transparent; border: 1px solid var(--card-border); color: var(--text-dim);
  cursor: pointer; font-size: 14px; line-height: 1;
}
.modal-close:hover{ color: var(--text); border-color: var(--accent); }
.modal-icon{ font-size: 32px; margin-bottom: 16px; }
.modal h3{ font-size: 22px; margin: 0 0 14px; font-weight: 800; }
.modal p{ font-size: 15.5px; color: var(--text-dim); margin: 0; line-height: 1.6; }
.modal-link{
  display: none; margin-top: 20px; color: var(--accent); text-decoration: none; font-size: 14px; font-weight: 700;
}
.modal-link:hover{ text-decoration: underline; }

.carousel{
  position: relative; max-width: 1160px; margin: 0 auto;
  height: 440px; display: flex; align-items: center; justify-content: center;
}
.carousel-track{ position: relative; width: 100%; height: 100%; }
.carousel-slide{
  position: absolute; top: 50%; left: 50%; width: min(720px, 62vw);
  transition: transform .45s cubic-bezier(.22,.61,.36,1), opacity .45s ease;
  cursor: pointer;
}
.carousel-slide img{
  border-radius: var(--radius); border: 1px solid var(--card-border);
  box-shadow: 0 20px 50px -15px var(--shadow-soft);
}
.carousel-slide.is-active{ transform: translate(-50%, -50%) scale(1.2); opacity: 1; z-index: 3; cursor: default; }
.carousel-slide.is-prev{ transform: translate(calc(-50% - 280px), -50%) scale(0.74); opacity: 0.5; z-index: 2; }
.carousel-slide.is-next{ transform: translate(calc(-50% + 280px), -50%) scale(0.74); opacity: 0.5; z-index: 2; }
.carousel-slide.is-hidden{ transform: translate(-50%, -50%) scale(0.5); opacity: 0; z-index: 1; pointer-events: none; }

.carousel-arrow{
  position: absolute; top: 50%; transform: translateY(-50%); z-index: 4;
  width: 48px; height: 48px; border-radius: 50%;
  background: var(--card); border: 1px solid var(--card-border); color: var(--text);
  font-size: 22px; line-height: 1; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
}
.carousel-arrow:hover{ border-color: var(--accent); color: var(--accent); }
.carousel-arrow-prev{ left: 0; }
.carousel-arrow-next{ right: 0; }

.carousel-caption{ text-align: center; margin: 20px 0 0; font-weight: 700; color: var(--text); }
.carousel-dots{ display: flex; justify-content: center; gap: 8px; margin-top: 14px; }
.carousel-dot{
  width: 8px; height: 8px; border-radius: 50%; padding: 0;
  background: var(--card-border); border: none; cursor: pointer;
}
.carousel-dot.is-active{ background: var(--accent); }

.strip{ background: var(--bg-alt); border-top: 1px solid var(--card-border); border-bottom: 1px solid var(--card-border); }
.grid-strip{ grid-template-columns: repeat(4, 1fr); text-align: center; }
.grid-strip .num{ font-size: 15px; }

.grid-modern{ grid-template-columns: repeat(4, 1fr); }

.docs-list{ display: grid; gap: 14px; grid-template-columns: repeat(3, 1fr); }
.doc-card{
  background: var(--card); border: 1px solid var(--card-border); border-radius: var(--radius);
  padding: 22px; text-decoration: none; transition: border-color .15s;
}
.doc-card:hover{ border-color: var(--accent); }
.doc-card h3{ margin: 0 0 6px; font-size: 16px; }
.doc-card p{ margin: 0; color: var(--text-dim); font-size: 14px; }

.usecase{
  margin-top: 28px; background: var(--card); border: 1px solid var(--card-border); border-radius: var(--radius);
  padding: 32px;
}
.usecase-head{ max-width: 720px; }
.usecase-tag{
  display: inline-block; font-size: 12px; font-weight: 700; letter-spacing: .04em; text-transform: uppercase;
  color: var(--accent-2); background: rgba(251,146,60,0.1); border: 1px solid rgba(251,146,60,0.3);
  padding: 5px 12px; border-radius: 999px; margin-bottom: 14px;
}
.usecase-head h3{ font-size: 22px; font-weight: 800; margin: 0 0 10px; letter-spacing: -0.01em; }
.usecase-head p{ color: var(--text-dim); font-size: 15px; margin: 0; }
.usecase-grid{ display: grid; grid-template-columns: 1fr 1fr; gap: 28px; margin-top: 24px; }
.usecase-grid h4{ font-size: 13px; font-weight: 700; letter-spacing: .02em; text-transform: uppercase; color: var(--text-dim); margin: 0 0 14px; }
.usecase-reqs ul, .usecase-map ul{ margin: 0; padding: 0; list-style: none; display: flex; flex-direction: column; gap: 10px; }
.usecase-reqs li, .usecase-map li{ font-size: 14.5px; color: var(--text-dim); line-height: 1.55; padding-left: 22px; position: relative; }
.usecase-reqs li::before{ content: '•'; position: absolute; left: 4px; color: var(--accent-2); font-weight: 800; }
.usecase-map li::before{ content: '✓'; position: absolute; left: 0; color: var(--accent); font-weight: 800; font-size: 13px; }
.usecase-map li strong{ color: var(--text); }
.usecase-foot{ margin: 24px 0 0; padding-top: 20px; border-top: 1px solid var(--card-border); color: var(--text-dim); font-size: 14px; }

@media (max-width: 860px){
  .usecase-grid{ grid-template-columns: 1fr; }
}

.cta{ text-align: center; padding-top: 20px; }
.cta h2{ font-size: 30px; font-weight: 800; margin: 0 0 12px; }
.cta p{ color: var(--text-dim); margin: 0 0 28px; }

.note{
  max-width: 760px; margin: 0 auto; text-align: center; color: var(--text-dim);
  font-size: 14px; background: rgba(251,146,60,0.08); border: 1px solid rgba(251,146,60,0.25);
  padding: 14px 20px; border-radius: 10px;
}

footer{ border-top: 1px solid var(--card-border); padding: 40px 0; }
.foot-row{ display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px; }
.foot-links{ display: flex; gap: 20px; flex-wrap: wrap; }
.foot-links a{ color: var(--text-dim); text-decoration: none; font-size: 14px; font-weight: 600; }
.foot-links a:hover{ color: var(--text); }
.copy{ color: var(--text-dim); font-size: 13px; }
.trademark-note{ color: var(--text-dim); font-size: 12px; opacity: 0.7; margin: 16px 0 0; }

@media (max-width: 860px){
  .nav-links{ display: none; }
  h1{ font-size: 34px; }
  .grid-features{ grid-template-columns: repeat(2, 1fr); }
  .grid-strip{ grid-template-columns: repeat(2, 1fr); }
  .grid-modern{ grid-template-columns: repeat(2, 1fr); }
  .docs-list{ grid-template-columns: 1fr; }
  .carousel{ height: 300px; }
  .carousel-slide{ width: min(520px, 80vw); }
  .carousel-slide.is-prev{ transform: translate(calc(-50% - 170px), -50%) scale(0.7); }
  .carousel-slide.is-next{ transform: translate(calc(-50% + 170px), -50%) scale(0.7); }
}
@media (max-width: 480px){
  .grid-features{ grid-template-columns: 1fr; }
  .grid-strip{ grid-template-columns: 1fr; }
  .grid-modern{ grid-template-columns: 1fr; }
  .carousel{ height: 230px; }
  .carousel-slide{ width: min(380px, 88vw); }
  .carousel-slide.is-prev{ transform: translate(calc(-50% - 115px), -50%) scale(0.62); }
  .carousel-slide.is-next{ transform: translate(calc(-50% + 115px), -50%) scale(0.62); }
}

/* ---- Doc pages ---- */
.doc-header{ padding: 48px 0 0; }
.doc-header .eyebrow-link{
  display: inline-flex; align-items: center; gap: 6px; text-decoration: none;
  color: var(--text-dim); font-size: 14px; font-weight: 600; margin-bottom: 18px;
}
.doc-header .eyebrow-link:hover{ color: var(--accent); }
.doc-header h1{ font-size: 34px; text-align: left; margin-bottom: 10px; }
.doc-header p.dek{ color: var(--text-dim); font-size: 16px; max-width: 720px; margin: 0 0 28px; }

.doc-nav{ display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 40px; }
.doc-nav a{
  text-decoration: none; color: var(--text-dim); font-size: 14px; font-weight: 600;
  padding: 8px 14px; border-radius: 999px; border: 1px solid var(--card-border);
}
.doc-nav a:hover{ color: var(--text); border-color: var(--accent); }
.doc-nav a.active{ color: #06111f; background: var(--accent); border-color: var(--accent); }

.doc-body{ max-width: 760px; margin: 0 auto; padding-bottom: 80px; }
.doc-body h2{ font-size: 24px; font-weight: 800; margin: 48px 0 16px; letter-spacing: -0.01em; }
.doc-body h2:first-child{ margin-top: 0; }
.doc-body p{ color: var(--text-dim); font-size: 16px; margin: 0 0 18px; }
.doc-body strong{ color: var(--text); }
.doc-body em{ color: var(--text); }
.doc-body ul, .doc-body ol{ color: var(--text-dim); font-size: 16px; margin: 0 0 18px; padding-left: 22px; }
.doc-body li{ margin-bottom: 8px; }
.doc-body li::marker{ color: var(--accent); }
.doc-body a{ color: var(--accent); text-decoration: underline; text-decoration-color: rgba(56,189,248,0.35); }
.doc-body a:hover{ text-decoration-color: var(--accent); }
.doc-body code{
  background: var(--card); border: 1px solid var(--card-border); border-radius: 5px;
  padding: 2px 6px; font-size: 0.9em; font-family: "SF Mono", Consolas, Menlo, monospace; color: var(--accent);
}
.doc-body pre{
  background: var(--card); border: 1px solid var(--card-border); border-radius: var(--radius);
  padding: 18px 20px; overflow-x: auto; margin: 0 0 24px;
}
.doc-body pre code{ background: none; border: none; padding: 0; color: var(--text); font-size: 13.5px; line-height: 1.6; }
.doc-body .shot{ margin: 8px 0 28px; }
.doc-body .shot img{ width: 100%; }

.callout{
  background: rgba(251,146,60,0.08); border: 1px solid rgba(251,146,60,0.25); border-radius: 10px;
  padding: 16px 20px; margin: 0 0 24px; color: var(--text-dim); font-size: 15px;
}
.callout strong{ color: var(--accent-2); }

.doc-table-wrap{ overflow-x: auto; margin: 0 0 28px; border: 1px solid var(--card-border); border-radius: var(--radius); }
.doc-body table{ width: 100%; border-collapse: collapse; font-size: 14.5px; }
.doc-body th, .doc-body td{ text-align: left; padding: 12px 16px; border-bottom: 1px solid var(--card-border); color: var(--text-dim); }
.doc-body th{ color: var(--text); font-weight: 700; background: var(--card); }
.doc-body tr:last-child td{ border-bottom: none; }

.mermaid-wrap{
  background: var(--card); border: 1px solid var(--card-border); border-radius: var(--radius);
  padding: 24px; margin: 0 0 28px; overflow-x: auto;
}
.doc-body .mermaid-wrap{
  width: 100vw; max-width: 1120px;
  margin-left: 50%; transform: translateX(-50%);
}
.mermaid-wrap svg{ min-width: 720px; }
@media (max-width: 860px){
  .doc-body .mermaid-wrap{ width: 100%; margin-left: 0; transform: none; }
}