:root {
  color-scheme: light;
  --page: #f9f9f7; --surface: #fcfcfb; --surface-2: #f3f2ef;
  --ink: #0b0b0b; --ink-2: #52514e; --muted: #898781; --ring: rgba(11,11,11,0.10);
  --accent: #2a78d6; --good: #0ca30c; --critical: #d03b3b;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --page: #0d0d0d; --surface: #1a1a19; --surface-2: #232321;
    --ink: #ffffff; --ink-2: #c3c2b7; --muted: #898781; --ring: rgba(255,255,255,0.10); --accent: #3987e5;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --page: #0d0d0d; --surface: #1a1a19; --surface-2: #232321;
  --ink: #ffffff; --ink-2: #c3c2b7; --muted: #898781; --ring: rgba(255,255,255,0.10); --accent: #3987e5;
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body { background: var(--page); color: var(--ink); font: 15px/1.6 var(--sans); }
a { color: var(--accent); }
.nav { display: flex; align-items: center; gap: 16px; padding: 14px 20px; border-bottom: 1px solid var(--ring); background: var(--surface); flex-wrap: wrap; }
.nav .brand { font-weight: 700; color: var(--ink); text-decoration: none; letter-spacing: -0.01em; }
.nav .spacer { flex: 1; }
.nav a:not(.brand):not(.btn) { color: var(--ink-2); text-decoration: none; }
.wrap { max-width: 880px; margin: 0 auto; padding: 32px 20px 64px; }
@media (max-width: 600px) { .wrap { padding: 24px 16px 48px; } .nav { padding: 12px 16px; } }
h1 { font-size: clamp(28px, 5vw, 42px); line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 12px; }
h2 { font-size: 22px; letter-spacing: -0.01em; margin: 40px 0 10px; }
h3 { font-size: 16px; margin: 24px 0 6px; }
p.lede { font-size: 18px; color: var(--ink-2); max-width: 640px; }
.card { background: var(--surface); border: 1px solid var(--ring); border-radius: 14px; padding: 20px; }
.btn { display: inline-block; border: 1px solid var(--ring); background: var(--surface); color: var(--ink); border-radius: 10px; padding: 8px 16px; font: inherit; font-weight: 600; cursor: pointer; text-decoration: none; }
.btn:hover { background: var(--surface-2); }
.btn-primary { background: var(--ink); color: var(--surface); border-color: var(--ink); }
.btn-primary:hover { background: var(--ink-2); }
.btn:disabled { opacity: .5; cursor: default; }
code, pre { font-family: var(--mono); font-size: 13px; }
:not(pre) > code { background: var(--surface-2); padding: 1px 6px; border-radius: 5px; word-break: break-word; }
pre { background: var(--surface-2); border: 1px solid var(--ring); padding: 12px 14px; border-radius: 10px; overflow-x: auto; line-height: 1.5; }
label { display: block; font-weight: 600; font-size: 14px; margin: 14px 0 6px; }
input, select { width: 100%; font: inherit; color: inherit; background: var(--surface); border: 1px solid var(--ring); border-radius: 8px; padding: 9px 12px; }
input:focus, select:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
.hint { color: var(--muted); font-size: 13px; margin-top: 4px; }
.msg { margin-top: 12px; font-size: 14px; min-height: 1.4em; }
.msg.err { color: var(--critical); }
.msg.ok { color: var(--good); }
.grid2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
@media (max-width: 700px) { .grid2 { grid-template-columns: minmax(0, 1fr); } }
.price { font-size: 30px; font-weight: 700; letter-spacing: -0.02em; margin: 4px 0 8px; }
ul.ticks { padding-left: 20px; margin: 8px 0 16px; color: var(--ink-2); }
.proxy-big { border: 2px solid var(--accent); border-radius: 14px; padding: 18px 20px; background: var(--surface); }
.proxy-big .label { font-size: 13px; font-weight: 700; color: var(--ink-2); text-transform: uppercase; letter-spacing: .05em; }
.proxy-big .row { display: flex; gap: 12px; align-items: center; margin-top: 8px; flex-wrap: wrap; }
.proxy-big code { font-size: clamp(15px, 2.4vw, 22px); font-weight: 700; background: var(--surface-2); padding: 8px 12px; border-radius: 8px; word-break: break-all; flex: 1; min-width: 0; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--ring); vertical-align: top; }
th { color: var(--ink-2); font-weight: 600; }
.meter { height: 8px; background: var(--surface-2); border-radius: 0 4px 4px 0; overflow: hidden; margin: 6px 0; }
.meter > div { height: 100%; background: var(--accent); border-radius: 0 4px 4px 0; }
.demo-card { display: flex; gap: 18px; align-items: center; flex-wrap: wrap; margin: 28px 0 8px; padding: 20px 22px; border-radius: 16px; background: var(--surface); border: 1px solid var(--ring); color: var(--ink); text-decoration: none; }
.demo-card:hover { border-color: var(--accent); }
.demo-card > span:nth-child(2) { flex: 1; min-width: 220px; color: var(--ink-2); }
.demo-card b { color: var(--ink); }
.demo-orb { width: 44px; height: 44px; border-radius: 50%; flex: none; background: radial-gradient(circle at 35% 35%, #eb6834, #2a78d6 70%); box-shadow: 0 0 28px rgba(42,120,214,.55); animation: orb 2.4s ease-in-out infinite; }
@keyframes orb { 50% { transform: scale(1.12); box-shadow: 0 0 40px rgba(235,104,52,.55); } }
@media (prefers-reduced-motion: reduce) { .demo-orb { animation: none; } }
.toc { display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0; }
.toc a { border: 1px solid var(--ring); border-radius: 999px; padding: 2px 12px; text-decoration: none; color: var(--ink-2); font-size: 14px; }