:root {
  --bg: #fdfdfc;
  --surface: #ffffff;
  --text: #111110;
  --text-2: #555551;
  --text-3: #8d8d86;
  --border: #e6e6e3;
  --border-s: #f0f0ed;
  --green: #1a7f37;
  --green-bg: #dafbe1;
  --indigo: #4f46e5;
  --indigo-bg: #eef2ff;
  --amber: #a16207;
  --amber-bg: #fef9c3;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --mono: 'JetBrains Mono', 'SF Mono', monospace;
  --w: 1060px;
  --r: 10px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body { font-family: var(--font); color: var(--text); background: var(--bg); line-height: 1.6; }
::selection { background: var(--text); color: var(--bg); }
a { color: inherit; }
img { max-width: 100%; display: block; }

/* ---- Gradient bar ---- */
.topbar {
  height: 2px;
  background: linear-gradient(90deg, var(--text) 0%, var(--indigo) 50%, var(--green) 100%);
  background-size: 200% 100%;
  animation: gshift 6s ease infinite alternate;
  position: fixed; top: 0; left: 0; right: 0; z-index: 200;
}
@keyframes gshift { from { background-position: 0% 0; } to { background-position: 100% 0; } }

/* ---- Nav ---- */
nav {
  position: fixed; top: 2px; left: 0; right: 0; z-index: 100;
  background: rgba(253,253,252,0.85);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}
nav .w {
  max-width: var(--w); margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between; height: 52px;
}
.logo { font-weight: 600; font-size: 1.05rem; letter-spacing: -0.04em; text-decoration: none; color: var(--text); }
.navr { display: flex; align-items: center; gap: 20px; list-style: none; }
.navr a { font-size: 0.82rem; color: var(--text-2); text-decoration: none; transition: color .15s; }
.navr a:hover { color: var(--text); }
.lang { font-size: 0.7rem; font-weight: 600; color: var(--text-3); cursor: pointer; background: #f4f4f1; border: 1px solid var(--border); padding: 3px 8px; border-radius: 4px; letter-spacing: 0.06em; transition: all .15s; }
.lang:hover { color: var(--text); border-color: var(--text-3); }

/* ---- Buttons ---- */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 10px 20px; font-size: 0.82rem; font-weight: 500; font-family: var(--font);
  border-radius: 6px; text-decoration: none; cursor: pointer; transition: all .15s; border: none;
}
.btn-p { background: var(--text); color: var(--bg); }
.btn-p:hover { background: #333; transform: translateY(-1px); box-shadow: 0 4px 12px rgba(0,0,0,.12); }
.btn-s { background: transparent; color: var(--text-2); border: 1px solid var(--border); }
.btn-s:hover { border-color: var(--text-3); color: var(--text); }
.btn-sm { padding: 6px 14px; font-size: 0.78rem; }
.btns { display: flex; gap: 12px; flex-wrap: wrap; }

/* ---- Layout ---- */
.w { max-width: var(--w); margin: 0 auto; padding: 0 24px; }
section { padding: 100px 0; }
section + section { border-top: 1px solid var(--border-s); }
.label { font-size: 0.68rem; font-weight: 600; color: var(--text-3); letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 12px; }
h1 { font-size: clamp(2.2rem,5vw,3.2rem); font-weight: 600; letter-spacing: -0.03em; line-height: 1.1; }
h2 { font-size: clamp(1.4rem,3vw,1.9rem); font-weight: 600; letter-spacing: -0.025em; line-height: 1.15; }
h3 { font-size: 1rem; font-weight: 600; letter-spacing: -0.01em; }
p.sub { color: var(--text-2); max-width: 520px; font-size: 1rem; line-height: 1.7; }

/* ---- Reveal ---- */
.rv { opacity: 0; transform: translateY(16px); transition: opacity .6s cubic-bezier(.16,1,.3,1), transform .6s cubic-bezier(.16,1,.3,1); }
.rv.v { opacity: 1; transform: none; }
.rv-d1 { transition-delay: .08s; }
.rv-d2 { transition-delay: .16s; }
.rv-d3 { transition-delay: .24s; }

/* ---- Hero ---- */
.hero { padding: 150px 0 80px; }
.hero h1 { max-width: 600px; margin-bottom: 16px; }
.hero p.sub { margin-bottom: 32px; }
.hero-tag { display: inline-flex; align-items: center; gap: 6px; font-size: 0.78rem; font-weight: 500; color: var(--text-3); margin-bottom: 20px; }
.hero-tag .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--green); animation: pulse 2.5s ease-in-out infinite; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: .3; } }

/* ---- Product visual (the core) ---- */
.pv {
  margin-top: 64px;
  border: 1px solid var(--border);
  border-radius: var(--r);
  background: var(--surface);
  overflow: hidden;
}
.pv-bar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  background: #fafaf8;
}
.pv-bar-title { font-size: 0.72rem; font-weight: 600; color: var(--text-3); letter-spacing: 0.06em; text-transform: uppercase; }
.pv-bar-dots { display: flex; gap: 5px; }
.pv-bar-dots span { width: 8px; height: 8px; border-radius: 50%; background: var(--border); }

.pv-table { width: 100%; border-collapse: collapse; font-size: 0.85rem; }
.pv-table th {
  text-align: left; font-weight: 600; font-size: 0.68rem; letter-spacing: 0.06em;
  text-transform: uppercase; color: var(--text-3); padding: 10px 16px;
  border-bottom: 1px solid var(--border); background: #fafaf8;
}
.pv-table td { padding: 12px 16px; border-bottom: 1px solid var(--border-s); color: var(--text-2); }
.pv-table tr:last-child td { border-bottom: none; }
.pv-table tr { transition: background .12s; }
.pv-table tbody tr:hover { background: #fafaf8; }
.pv-table .name { color: var(--text); font-weight: 500; }
.tag {
  display: inline-block; font-size: 0.65rem; font-weight: 600; letter-spacing: 0.04em;
  text-transform: uppercase; padding: 2px 7px; border-radius: 4px;
}
.tag-s { background: var(--green-bg); color: var(--green); }
.tag-p { background: var(--indigo-bg); color: var(--indigo); }
.tag-g { background: var(--amber-bg); color: var(--amber); }
.bar-v { display: flex; align-items: center; gap: 8px; }
.bar-fill { height: 4px; border-radius: 2px; background: var(--border); }
.bar-fill-inner { height: 100%; border-radius: 2px; background: var(--text-3); }
.bar-num { font-size: 0.75rem; color: var(--text-3); font-family: var(--mono); min-width: 28px; }

.pv-table--compact td { padding: 10px 16px; font-size: 0.82rem; }

/* ---- Guard flow ---- */
.flow {
  display: grid; grid-template-columns: 1fr auto 1fr auto 1fr;
  align-items: center; gap: 0;
  margin: 40px 0;
}
.flow-box {
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: var(--r);
  background: var(--surface);
  text-align: center;
}
.flow-box h3 { margin-bottom: 4px; }
.flow-box p { font-size: 0.82rem; color: var(--text-2); max-width: none; }
.flow-box.guard {
  border-color: var(--text);
  background: var(--text);
  color: var(--bg);
}
.flow-box.guard p { color: rgba(255,255,255,.6); }
.flow-arrow { text-align: center; color: var(--text-3); font-size: 1.2rem; padding: 0 8px; }

/* ---- Features grid ---- */
.fgrid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--r);
  overflow: hidden;
  margin: 40px 0;
}
.fgrid-item {
  padding: 24px;
  background: var(--surface);
}
.fgrid-item h3 { margin-bottom: 6px; font-size: 0.9rem; }
.fgrid-item p { font-size: 0.82rem; color: var(--text-2); max-width: none; line-height: 1.6; }

/* ---- Modes side by side ---- */
.modes { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 32px 0; }
.mode {
  padding: 24px; border-radius: var(--r); border: 1px solid var(--border);
  transition: transform .15s, box-shadow .15s;
}
.mode:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(0,0,0,.05); }
.mode-s { background: #f0fdf4; border-color: #bbf7d0; }
.mode-pr { background: #eef2ff; border-color: #c7d2fe; }
.mode .label { margin-bottom: 8px; }
.mode-s .label { color: var(--green); }
.mode-pr .label { color: var(--indigo); }
.mode h3 { margin-bottom: 6px; font-size: 0.92rem; }
.mode p { font-size: 0.82rem; color: var(--text-2); max-width: none; line-height: 1.6; }

/* ---- Quote ---- */
.q {
  font-size: 0.95rem; font-style: italic; color: var(--text);
  border-left: 2px solid var(--text); padding-left: 20px; margin: 32px 0; max-width: 500px;
}

/* ---- Roadmap ---- */
.road { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 12px; margin: 40px 0; }
.road-col {
  padding: 20px; border: 1px solid var(--border); border-radius: var(--r); background: var(--surface);
}
.road-col h3 {
  font-size: 0.72rem; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase;
  margin-bottom: 12px; padding-bottom: 8px; border-bottom: 2px solid var(--text);
}
.road-col:nth-child(2) h3 { border-color: var(--text-2); }
.road-col:nth-child(3) h3 { border-color: var(--border); }
.road-item { font-size: 0.8rem; color: var(--text-2); padding: 6px 0; line-height: 1.5; }
.road-item + .road-item { border-top: 1px solid var(--border-s); }

/* ---- CTA ---- */
.cta h2 { max-width: 500px; margin-bottom: 12px; }
.cta p.sub { margin-bottom: 28px; }

/* ---- Footer ---- */
footer { padding: 24px 0; border-top: 1px solid var(--border-s); }
footer .w { display: flex; justify-content: space-between; align-items: center; }
.ft { font-size: 0.75rem; color: var(--text-3); }
.fl { display: flex; gap: 20px; list-style: none; }
.fl a { font-size: 0.75rem; color: var(--text-3); text-decoration: none; transition: color .15s; }
.fl a:hover { color: var(--text); }

/* ---- Responsive ---- */
@media (max-width: 768px) {
  section { padding: 72px 0; }
  .hero { padding: 120px 0 60px; }
  .fgrid, .modes, .road { grid-template-columns: 1fr; }
  .flow { grid-template-columns: 1fr; gap: 8px; }
  .flow-arrow { transform: rotate(90deg); }
  .navr .hm { display: none; }
  footer .w { flex-direction: column; gap: 12px; }
  .pv-table .hm { display: none; }
}


/* ========================================
   DOCS
   ======================================== */
.docs-l {
  display: grid; grid-template-columns: 180px 1fr; gap: 64px;
  padding-top: 120px; padding-bottom: 100px;
}
.docs-n { position: sticky; top: 80px; align-self: start; }
.docs-n ul { list-style: none; }
.docs-n li + li { margin-top: 2px; }
.docs-n a { display: block; font-size: 0.8rem; color: var(--text-3); text-decoration: none; padding: 3px 0; transition: color .15s; }
.docs-n a:hover, .docs-n a.active { color: var(--text); }
.docs-c { max-width: 600px; }
.docs-c h1 { font-size: 1.6rem; margin-bottom: 12px; }
.docs-c h2 { font-size: 1.2rem; margin-top: 56px; margin-bottom: 12px; padding-top: 32px; border-top: 1px solid var(--border-s); }
.docs-c h2:first-of-type { margin-top: 40px; border-top: none; padding-top: 0; }
.docs-c h3 { font-size: 0.95rem; margin-top: 28px; margin-bottom: 6px; }
.docs-c p { font-size: 0.87rem; color: var(--text-2); margin-bottom: 12px; max-width: none; line-height: 1.7; }
.docs-c ul, .docs-c ol { margin-bottom: 12px; padding-left: 20px; }
.docs-c li { font-size: 0.87rem; color: var(--text-2); line-height: 1.7; margin-bottom: 3px; }
.docs-c code { font-family: var(--mono); font-size: 0.8rem; background: #f4f4f1; border: 1px solid var(--border); padding: 1px 5px; border-radius: 3px; }
.docs-c pre { background: var(--text); color: #d4d4d8; padding: 20px; border-radius: var(--r); overflow-x: auto; margin-bottom: 20px; font-size: 0.8rem; line-height: 1.6; }
.docs-c pre code { background: none; border: none; padding: 0; color: inherit; }
.docs-c table { width: 100%; border-collapse: collapse; margin-bottom: 20px; font-size: 0.82rem; }
.docs-c th { text-align: left; font-weight: 600; font-size: 0.68rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--text-3); padding: 8px 12px; border-bottom: 2px solid var(--border); }
.docs-c td { padding: 8px 12px; border-bottom: 1px solid var(--border-s); color: var(--text-2); vertical-align: top; }
@media (max-width: 768px) {
  .docs-l { grid-template-columns: 1fr; gap: 24px; }
  .docs-n { position: static; border-bottom: 1px solid var(--border); padding-bottom: 12px; }
  .docs-n ul { display: flex; flex-wrap: wrap; gap: 4px 16px; }
  .docs-n li + li { margin-top: 0; }
}