:root {
  --bg: #fbfbf9; --bg2: #f1f1ec; --card: #ffffff; --ink: #1b1f23; --muted: #5b646e; --line: #dcdcd4;
  --accent: #0f766e; --accent-ink: #ffffff; --accent-soft: #d9efec; --warn: #8a5a00; --warn-bg: #fdf3dc;
  --code-bg: #eeeee8;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #111416; --bg2: #181c1f; --card: #1c2125; --ink: #e8ebed; --muted: #9aa4ad; --line: #2c343a;
    --accent: #2dd4bf; --accent-ink: #06201d; --accent-soft: #123532; --warn: #f0c36b; --warn-bg: #2a2212;
    --code-bg: #20262b;
  }
}
:root[data-theme="dark"] {
  --bg: #111416; --bg2: #181c1f; --card: #1c2125; --ink: #e8ebed; --muted: #9aa4ad; --line: #2c343a;
  --accent: #2dd4bf; --accent-ink: #06201d; --accent-soft: #123532; --warn: #f0c36b; --warn-bg: #2a2212;
  --code-bg: #20262b;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
a { color: var(--accent); }
a:hover { text-decoration-thickness: 2px; }
.wrap { max-width: 1040px; margin: 0 auto; padding: 0 16px; }
.narrow { max-width: 760px; }
header.top { position: sticky; top: 0; z-index: 10; background: color-mix(in srgb, var(--bg) 92%, transparent); backdrop-filter: blur(6px); border-bottom: 1px solid var(--line); }
header.top .wrap { display: flex; align-items: center; gap: 20px; height: 56px; }
.logo { font-weight: 700; font-size: 20px; color: var(--ink); text-decoration: none; letter-spacing: -.01em; }
.logo span { color: var(--accent); }
nav.main { display: flex; gap: 18px; margin-left: auto; align-items: center; font-size: 15px; }
nav.main a { color: var(--muted); text-decoration: none; }
nav.main a:hover { color: var(--ink); }
.btn { display: inline-block; padding: 10px 18px; border-radius: 8px; border: 1px solid var(--accent); background: var(--accent); color: var(--accent-ink) !important; font-weight: 600; text-decoration: none !important; font-size: 16px; cursor: pointer; }
.btn.ghost { background: transparent; color: var(--accent) !important; }
.btn.small { padding: 6px 12px; font-size: 14px; }
.theme { background: none; border: 1px solid var(--line); border-radius: 8px; color: var(--muted); padding: 4px 9px; cursor: pointer; font-size: 14px; }
section { padding: 56px 0; }
section.alt { background: var(--bg2); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
h1 { font-size: clamp(30px, 5vw, 46px); line-height: 1.15; margin: 0 0 16px; letter-spacing: -.02em; }
h2 { font-size: clamp(24px, 3.4vw, 32px); line-height: 1.2; margin: 0 0 12px; letter-spacing: -.01em; }
h3 { font-size: 19px; margin: 24px 0 6px; }
p { margin: 0 0 14px; }
.lead { font-size: 20px; color: var(--muted); max-width: 720px; }
.hero { padding: 72px 0 48px; }
.hero .cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.eyebrow { color: var(--accent); font-weight: 600; font-size: 14px; text-transform: uppercase; letter-spacing: .06em; margin-bottom: 10px; }
.grid { display: grid; gap: 16px; }
.grid > * { min-width: 0; }
code { overflow-wrap: anywhere; }
.g2 { grid-template-columns: repeat(2, 1fr); }
.g3 { grid-template-columns: repeat(3, 1fr); }
.g4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 880px) { .g4 { grid-template-columns: repeat(2, 1fr); } .g3 { grid-template-columns: 1fr; } }
@media (max-width: 640px) { .g2, .g4 { grid-template-columns: minmax(0, 1fr); } header.top .wrap { gap: 10px; } nav.main { gap: 10px; } .logo { font-size: 18px; } nav.main a.hide-s { display: none; } section { padding: 40px 0; } }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 20px; }
.card h3 { margin-top: 0; }
.stat { font-size: 30px; font-weight: 700; letter-spacing: -.02em; line-height: 1.1; }
.stat small { display: block; font-size: 14px; font-weight: 400; color: var(--muted); letter-spacing: 0; margin-top: 6px; line-height: 1.4; }
code, pre { font-family: ui-monospace, "SFMono-Regular", Consolas, monospace; font-size: .9em; }
code { background: var(--code-bg); padding: 1px 5px; border-radius: 4px; }
pre { background: var(--code-bg); border-radius: 10px; padding: 14px 16px; overflow-x: auto; margin: 0 0 14px; }
pre code { background: none; padding: 0; }
.note { background: var(--warn-bg); color: var(--ink); border-left: 4px solid var(--warn); padding: 12px 16px; border-radius: 6px; margin: 16px 0; font-size: 15.5px; }
.diagram { width: 100%; height: auto; display: block; }
.diagram text { fill: var(--ink); font: 14px system-ui, sans-serif; }
.diagram .sub { fill: var(--muted); font-size: 12px; }
.diagram .box { fill: var(--card); stroke: var(--line); stroke-width: 1.5; }
.diagram .hl { fill: var(--accent-soft); stroke: var(--accent); stroke-width: 1.5; }
.diagram .wire { stroke: var(--muted); stroke-width: 1.5; fill: none; }
.diagram .tun { stroke: var(--accent); stroke-width: 2.5; fill: none; stroke-dasharray: 7 4; }
.diagram .zone { fill: none; stroke: var(--line); stroke-width: 1.5; stroke-dasharray: 3 5; }
figure { margin: 16px 0; }
figure img { width: 100%; height: auto; display: block; border: 1px solid var(--line); border-radius: 10px; background: var(--card); }
figcaption { color: var(--muted); font-size: 14.5px; margin-top: 6px; }
.price { display: flex; flex-direction: column; }
.price .amount { font-size: 34px; font-weight: 700; letter-spacing: -.02em; }
.price .amount small { font-size: 16px; font-weight: 400; color: var(--muted); }
.price ul { padding-left: 20px; margin: 12px 0 18px; flex: 1; }
.price li { margin-bottom: 6px; }
.price.featured { border: 2px solid var(--accent); }
.price .btn { text-align: center; }
details { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 14px 18px; margin-bottom: 10px; }
summary { cursor: pointer; font-weight: 600; }
details[open] summary { margin-bottom: 8px; }
form.access { display: grid; gap: 14px; }
form.access label { display: grid; gap: 4px; font-weight: 600; font-size: 15px; }
form.access input, form.access select, form.access textarea { font: inherit; padding: 10px 12px; border-radius: 8px; border: 1px solid var(--line); background: var(--card); color: var(--ink); }
form.access input:focus-visible, form.access select:focus-visible, form.access textarea:focus-visible, .btn:focus-visible, a:focus-visible, summary:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
form.access .hp { position: absolute; left: -9999px; }
.status { min-height: 1.5em; font-weight: 600; }
.status.err { color: #c2410c; }
footer { border-top: 1px solid var(--line); padding: 32px 0 48px; color: var(--muted); font-size: 15px; }
footer .cols { display: flex; flex-wrap: wrap; gap: 24px 48px; justify-content: space-between; }
footer a { color: var(--muted); }
.legal h1 { font-size: 32px; }
.legal h2 { font-size: 22px; margin-top: 32px; }
.legal ol, .legal ul { padding-left: 22px; }
.legal li { margin-bottom: 6px; }
.draft { background: var(--warn-bg); border: 1px solid var(--warn); border-radius: 8px; padding: 14px 18px; margin: 20px 0 28px; font-size: 15.5px; }
.ph { background: var(--warn-bg); padding: 0 4px; border-radius: 3px; }
table.t { width: 100%; border-collapse: collapse; margin: 12px 0 18px; font-size: 15.5px; }
table.t th, table.t td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }