:root {
  --bg: #f7f8fb;
  --surface: #ffffff;
  --surface-2: #eef1f7;
  --text: #141a26;
  --muted: #5a6478;
  --line: #dde2ec;
  --accent: #2f5bea;
  --accent-2: #1c3fb8;
  --accent-soft: #e6ecff;
  --ok: #18794e;
  --warn: #a35c00;
  --danger: #c0262d;
  --shadow: 0 1px 2px rgb(20 26 38 / 6%), 0 8px 24px rgb(20 26 38 / 6%);
  --radius: 14px;
  --max: 1120px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0d1119;
    --surface: #151b26;
    --surface-2: #1c2431;
    --text: #e8ecf4;
    --muted: #9aa5ba;
    --line: #283244;
    --accent: #7c9bff;
    --accent-2: #a3b9ff;
    --accent-soft: #1d2a4d;
    --ok: #4cc38a;
    --warn: #f0a648;
    --danger: #ff6b6b;
    --shadow: 0 1px 2px rgb(0 0 0 / 30%), 0 8px 24px rgb(0 0 0 / 25%);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0d1119;
  --surface: #151b26;
  --surface-2: #1c2431;
  --text: #e8ecf4;
  --muted: #9aa5ba;
  --line: #283244;
  --accent: #7c9bff;
  --accent-2: #a3b9ff;
  --accent-soft: #1d2a4d;
  --ok: #4cc38a;
  --warn: #f0a648;
  --danger: #ff6b6b;
  --shadow: 0 1px 2px rgb(0 0 0 / 30%), 0 8px 24px rgb(0 0 0 / 25%);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
img { max-width: 100%; height: auto; }
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: var(--accent-2); }
h1, h2, h3 { line-height: 1.2; letter-spacing: -0.01em; }
h1 { font-size: clamp(2rem, 5vw, 3.2rem); margin: 0 0 16px; }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); margin: 0 0 12px; }
h3 { font-size: 1.15rem; margin: 0 0 6px; }
code, kbd, pre { font-family: ui-monospace, "Cascadia Code", Consolas, monospace; font-size: 0.92em; }
code, kbd { background: var(--surface-2); border: 1px solid var(--line); border-radius: 6px; padding: 1px 6px; }
pre { background: var(--surface-2); border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; overflow-x: auto; }
pre code { background: none; border: 0; padding: 0; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 16px; }
.muted { color: var(--muted); }
.small { font-size: 0.9rem; }

/* Header */
.top { position: sticky; top: 0; z-index: 10; background: color-mix(in srgb, var(--bg) 85%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.top .wrap { display: flex; align-items: center; gap: 16px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.1rem; color: var(--text); text-decoration: none; }
.brand img { width: 30px; height: 30px; }
.nav { display: flex; gap: 4px; margin-left: auto; align-items: center; }
.nav a { color: var(--muted); text-decoration: none; padding: 8px 12px; border-radius: 8px; font-weight: 500; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--text); background: var(--surface-2); }
.theme { border: 1px solid var(--line); background: var(--surface); color: var(--text); border-radius: 8px; width: 38px; height: 38px; cursor: pointer; font-size: 1rem; }
.menu-btn { display: none; }
@media (max-width: 760px) {
  .menu-btn { display: inline-block; margin-left: auto; }
  .nav { display: none; position: absolute; top: 64px; left: 0; right: 0; flex-direction: column; align-items: stretch; background: var(--surface); border-bottom: 1px solid var(--line); padding: 8px 16px 16px; }
  .nav.open { display: flex; }
}

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 20px; border-radius: 10px; font-weight: 600; text-decoration: none; border: 1px solid transparent; cursor: pointer; font-size: 1rem; font-family: inherit; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-2); color: #fff; }
:root[data-theme="dark"] .btn-primary, :root[data-theme="dark"] .btn-primary:hover { color: #0d1119; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .btn-primary, :root:not([data-theme="light"]) .btn-primary:hover { color: #0d1119; } }
.btn-ghost { background: var(--surface); color: var(--text); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--accent); color: var(--text); }
.btn:disabled { opacity: 0.6; cursor: default; }

/* Hero */
.hero { padding: 72px 0 48px; }
.hero .wrap { display: grid; grid-template-columns: 1.05fr 1fr; gap: 48px; align-items: center; }
.eyebrow { display: inline-block; color: var(--accent); background: var(--accent-soft); border-radius: 999px; padding: 4px 12px; font-weight: 600; font-size: 0.85rem; margin-bottom: 16px; }
.lead { font-size: 1.2rem; color: var(--muted); margin: 0 0 28px; }
.actions { display: flex; gap: 12px; flex-wrap: wrap; }
.hero-shot { border-radius: var(--radius); border: 1px solid var(--line); box-shadow: var(--shadow); background: var(--surface); }
.facts { display: flex; gap: 20px; flex-wrap: wrap; margin-top: 28px; color: var(--muted); font-size: 0.92rem; }
.facts span::before { content: "✓ "; color: var(--ok); font-weight: 700; }
@media (max-width: 900px) { .hero .wrap { grid-template-columns: 1fr; } .hero { padding-top: 40px; } }

/* Sections */
section { padding: 56px 0; }
.section-head { max-width: 680px; margin-bottom: 32px; }
.section-head p { color: var(--muted); margin: 0; }
.alt { background: var(--surface); border-block: 1px solid var(--line); }
.grid { display: grid; gap: 20px; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.alt .card { background: var(--bg); }
.card p { margin: 0; color: var(--muted); }
.card-link { text-decoration: none; color: inherit; transition: border-color 0.15s; }
.card-link:hover { border-color: var(--accent); color: inherit; }
.icon { width: 40px; height: 40px; border-radius: 10px; background: var(--accent-soft); color: var(--accent); display: grid; place-items: center; font-size: 1.2rem; margin-bottom: 14px; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
@media (max-width: 860px) { .split { grid-template-columns: 1fr; } }
.shots { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.shots figure { margin: 0; }
.shots img { border-radius: 10px; border: 1px solid var(--line); }
.shots figcaption { color: var(--muted); font-size: 0.9rem; margin-top: 6px; }
@media (max-width: 760px) { .shots { grid-template-columns: 1fr; } }
.diagram { background: var(--surface-2); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; font: 0.86rem/1.5 ui-monospace, Consolas, monospace; overflow-x: auto; white-space: pre; }

/* Pricing */
.plans { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 20px; }
.plan { display: flex; flex-direction: column; gap: 12px; }
.plan.featured { border: 2px solid var(--accent); }
.price { font-size: 2.2rem; font-weight: 700; }
.plan ul { margin: 0; padding-left: 20px; color: var(--muted); flex: 1; }

/* Steps */
.steps { counter-reset: step; display: grid; gap: 16px; padding: 0; list-style: none; }
.steps li { counter-increment: step; position: relative; padding-left: 52px; }
.steps li::before { content: counter(step); position: absolute; left: 0; top: 0; width: 36px; height: 36px; border-radius: 50%; background: var(--accent-soft); color: var(--accent); font-weight: 700; display: grid; place-items: center; }

/* Forms */
.form { display: grid; gap: 16px; }
.form .row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; align-items: end; }
@media (max-width: 640px) { .form .row { grid-template-columns: 1fr; } }
label { display: grid; gap: 6px; font-weight: 600; font-size: 0.95rem; }
label .hint { font-weight: 400; color: var(--muted); font-size: 0.85rem; }
input, textarea, select { font: inherit; color: var(--text); background: var(--bg); border: 1px solid var(--line); border-radius: 10px; padding: 11px 13px; width: 100%; }
input:focus, textarea:focus, select:focus { outline: 2px solid var(--accent); outline-offset: 0; border-color: var(--accent); }
input.code { font-family: ui-monospace, Consolas, monospace; letter-spacing: 0.06em; text-transform: uppercase; }
input[aria-invalid="true"] { border-color: var(--danger); }
.check { display: flex; gap: 10px; align-items: flex-start; font-weight: 400; }
.check input { width: auto; margin-top: 5px; }
.hp { position: absolute; left: -9999px; }
.notice { border-radius: 10px; padding: 14px 16px; border: 1px solid var(--line); background: var(--surface-2); }
.notice.ok { border-color: var(--ok); }
.notice.err { border-color: var(--danger); color: var(--danger); }
.license-key { display: block; word-break: break-all; padding: 10px 12px; font-size: 0.85rem; }
.field-msg { font-weight: 400; font-size: 0.85rem; min-height: 1.2em; }
.field-msg.ok { color: var(--ok); }
.field-msg.err { color: var(--danger); }

/* Knowledge base */
.kb { display: grid; grid-template-columns: 240px 1fr; gap: 40px; padding: 40px 0 64px; }
.kb-nav { position: sticky; top: 88px; align-self: start; display: grid; gap: 2px; }
.kb-nav a { color: var(--muted); text-decoration: none; padding: 7px 10px; border-radius: 8px; font-size: 0.95rem; }
.kb-nav a:hover, .kb-nav a[aria-current="page"] { background: var(--surface-2); color: var(--text); }
.kb-nav .group { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); margin: 14px 10px 4px; font-weight: 700; }
.article { min-width: 0; max-width: 760px; }
.article h2 { margin-top: 36px; font-size: 1.4rem; }
.article h3 { margin-top: 24px; }
.article table { border-collapse: collapse; width: 100%; margin: 16px 0; display: block; overflow-x: auto; }
.article th, .article td { border: 1px solid var(--line); padding: 8px 10px; text-align: left; vertical-align: top; }
.article th { background: var(--surface-2); }
.article blockquote { margin: 16px 0; padding: 10px 16px; border-left: 4px solid var(--accent); background: var(--accent-soft); border-radius: 0 10px 10px 0; }
.article blockquote p { margin: 0; }
.kb-search { margin-bottom: 8px; }
@media (max-width: 860px) { .kb { grid-template-columns: 1fr; } .kb-nav { position: static; } }

/* Page */
.page { padding: 48px 0 72px; max-width: 820px; }

/* Footer */
.foot { border-top: 1px solid var(--line); padding: 32px 0; color: var(--muted); font-size: 0.92rem; }
.foot .wrap { display: flex; gap: 20px; flex-wrap: wrap; justify-content: space-between; }
.foot nav { display: flex; gap: 16px; flex-wrap: wrap; }
.foot a { color: var(--muted); }