/* ========== Reset & base ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: var(--text); text-decoration: none; }
a:hover { color: var(--accent); }
::selection { background: var(--accent-dim); color: #fff; }
code.inline {
  font-family: var(--mono);
  color: var(--accent);
  background: var(--accent-soft);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 0.9em;
}

/* ========== Layout ========== */
.wrap { max-width: 960px; margin: 0 auto; padding: 0 24px; }

/* ========== Nav ========== */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(10,10,10,0.72);
  backdrop-filter: saturate(180%) blur(10px);
  -webkit-backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 56px; gap: 12px; overflow: hidden;
}
.logo {
  display: inline-flex;
  align-items: center;
  min-width: 0;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  font-family: var(--mono);
  font-weight: 600;
  font-size: 14px;
  letter-spacing: -0.01em;
  color: var(--text);
}
.logo img { height: 16px; width: auto; flex-shrink: 0; display: block; margin-right: 7px; }
@media (max-width: 640px) { .logo img { display: none; } }
.logo:hover { color: var(--text); }
.logo .dot { color: var(--accent); }
.logo-root {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
  color: var(--text);
  white-space: nowrap;
}
.logo-root:hover { color: var(--text); }
.bc-sep { color: var(--muted); flex-shrink: 0; }
.bc-link { color: var(--muted); font-weight: 400; white-space: nowrap; }
.bc-link:hover { color: var(--text); }
.bc-cur { color: var(--muted); font-weight: 400; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; min-width: 0; }
.nav-links { display: flex; gap: 22px; align-items: center; font-size: 13px; color: var(--text-dim); }
.nav-links a { color: var(--text-dim); }
.nav-links a:hover { color: var(--text); }
.lang-switch {
  font-family: var(--mono);
  font-size: 11px;
  padding: 3px 8px;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  color: var(--text-dim) !important;
  letter-spacing: 0.05em;
}
.lang-switch:hover { border-color: var(--accent); color: var(--text) !important; }
@media (max-width: 640px) { .nav-links a.hide-sm { display: none; } }

/* ========== Hero ========== */
.hero { padding: 96px 0 72px; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--accent-dim);
  padding: 6px 12px;
  border-radius: 999px;
  margin-bottom: 28px;
}
.eyebrow::before {
  content: ''; width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
}
h1 {
  font-size: clamp(38px, 6.5vw, 64px);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.028em;
  margin-bottom: 24px;
}
h1 .accent { color: var(--accent); }
.lead {
  font-size: clamp(17px, 1.8vw, 20px);
  color: var(--text-dim);
  max-width: 620px;
  line-height: 1.6;
  margin-bottom: 40px;
}
.notice {
  border: 1px solid var(--border);
  background: var(--bg-elev);
  border-radius: 10px;
  padding: 16px 18px;
  margin: 0 0 28px;
  max-width: 720px;
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.6;
}
.notice strong { color: var(--text); font-weight: 600; }

/* ========== Buttons ========== */
.cta-row { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--sans);
  font-weight: 500;
  font-size: 14px;
  padding: 11px 18px;
  border-radius: 8px;
  border: 1px solid var(--border-strong);
  transition: all 0.15s ease;
}
.btn-primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-primary:hover { background: #8d85e6; color: #fff; transform: translateY(-1px); }
.btn-ghost { background: transparent; color: var(--text); }
.btn-ghost:hover { background: var(--bg-elev); color: var(--text); border-color: var(--border-strong); }
.btn svg { width: 14px; height: 14px; }

/* ========== Section ========== */
section { padding: 64px 0; border-top: 1px solid var(--border); }
section.no-top { border-top: none; }
.section-label {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 14px;
}
h2 {
  font-size: clamp(26px, 3.4vw, 34px);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 18px;
}
.section-lead {
  color: var(--text-dim);
  font-size: 16px;
  max-width: 640px;
  margin-bottom: 40px;
}

/* ========== Code block ========== */
.code {
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-family: var(--mono);
  font-size: 13.5px;
  line-height: 1.75;
  overflow: hidden;
}
.code-head {
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
  font-size: 12px;
  color: var(--muted);
}
.code-head .dots { display: flex; gap: 6px; }
.code-head .dots span { width: 10px; height: 10px; border-radius: 50%; background: #333; }
.code-meta { display: inline-flex; align-items: center; gap: 10px; }
.copy-btn {
  border: 1px solid var(--border-strong);
  background: transparent;
  color: var(--text-dim);
  border-radius: 6px;
  padding: 3px 8px;
  font-family: var(--mono);
  font-size: 11px;
  cursor: pointer;
}
.copy-btn:hover { color: var(--text); border-color: var(--accent-dim); }
.copy-btn.is-copied { color: var(--green); border-color: rgba(123,216,143,0.35); }
.copy-source {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  opacity: 0;
}
.helper-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 12px 0 0;
  font-size: 13px;
  color: var(--muted);
}
.helper-links a { color: var(--accent); font-family: var(--mono); }
.helper-links a:hover { color: var(--text); }
.code pre { padding: 18px 20px; overflow-x: auto; color: var(--text-dim); }
.code .c-dim { color: var(--muted); }
.code .c-acc { color: var(--accent); }
.code .c-gr  { color: var(--green); }
.code .c-tx  { color: var(--text); }

/* ========== Steps ========== */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 8px;
}
@media (max-width: 780px) { .steps { grid-template-columns: 1fr; } }
.step {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 22px;
}
.step-num { font-family: var(--mono); font-size: 12px; color: var(--accent); margin-bottom: 10px; }
.step h3 { font-size: 16px; font-weight: 600; margin-bottom: 8px; letter-spacing: -0.01em; }
.step p { font-size: 14px; color: var(--text-dim); line-height: 1.6; }

/* ========== Comparison table ========== */
.table-wrap {
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  background: var(--bg-elev);
}
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td {
  padding: 14px 18px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
th { font-weight: 600; color: var(--text); background: var(--bg-code); font-size: 13px; }
tr:last-child td { border-bottom: none; }
td.dim { color: var(--muted); }
td.hi { color: var(--accent); }
td.yes { color: var(--green); }
td.no { color: var(--red); }
.col-feat { font-weight: 500; color: var(--text); }
@media (max-width: 640px) {
  table { font-size: 13px; }
  th, td { padding: 10px 12px; }
}

/* ========== Card grid (products / experiments / ecosystem) ========== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
@media (max-width: 640px) { .card-grid { grid-template-columns: 1fr; } }
.card {
  border: 1px solid var(--border);
  background: var(--bg-elev);
  border-radius: 12px;
  padding: 22px;
  position: relative;
  transition: border-color 0.15s ease;
}
.card.linked:hover { border-color: var(--accent-dim); }
.card .card-domain {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--accent);
  margin-bottom: 6px;
}
.card .card-status {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  float: right;
}
.card .card-status.shipping { color: var(--green); }
.card h3 { font-size: 16px; font-weight: 600; margin-bottom: 8px; letter-spacing: -0.01em; }
.card p { font-size: 14px; color: var(--text-dim); line-height: 1.6; }
.card .card-cta {
  display: inline-block;
  margin-top: 12px;
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--accent);
}

/* ========== Experiment cards ========== */
.experiments { display: grid; gap: 16px; }
.experiment {
  border: 1px solid var(--border);
  background: var(--bg-elev);
  border-radius: 12px;
  padding: 22px 24px;
}
.experiment-head {
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}
.badge {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--mono);
  font-size: 11px;
  padding: 3px 9px;
  border-radius: 999px;
  background: rgba(123,216,143,0.1);
  color: var(--green);
  border: 1px solid rgba(123,216,143,0.2);
}
.badge::before { content: ''; width: 5px; height: 5px; border-radius: 50%; background: var(--green); }
.experiment h3 { font-size: 15px; font-weight: 600; letter-spacing: -0.01em; }
.experiment p { color: var(--text-dim); font-size: 14px; line-height: 1.65; }
.experiment .meta {
  margin-top: 12px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
  display: flex; gap: 20px; flex-wrap: wrap;
}
.experiment .meta span strong { color: var(--text-dim); font-weight: 400; }

/* ========== Diagram ========== */
.diagram {
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px 22px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.9;
  overflow-x: auto;
  white-space: pre;
}
.diagram .hi { color: var(--accent); }
.diagram .dim { color: var(--muted); }

/* ========== Quote ========== */
.quote {
  border-left: 2px solid var(--accent);
  padding: 4px 0 4px 20px;
  margin: 32px 0;
  color: var(--text-dim);
  font-size: 16px;
  font-style: italic;
}
.quote cite {
  display: block;
  margin-top: 8px;
  font-style: normal;
  font-size: 13px;
  color: var(--muted);
  font-family: var(--mono);
}

/* ========== Footer ========== */
footer {
  padding: 56px 0 40px;
  border-top: 1px solid var(--border);
  margin-top: 40px;
}
.foot-inner {
  display: flex; justify-content: space-between; align-items: center;
  gap: 24px; flex-wrap: wrap;
}
.foot-links { display: flex; gap: 22px; font-size: 13px; }
.foot-links a { color: var(--muted); }
.foot-links a:hover { color: var(--text); }
.copy { font-size: 12px; color: var(--muted); font-family: var(--mono); }