:root { color-scheme: light; --ink: #1c1915; --line: #d9d3c7; --paper: #f6f3ee; --card: #fff; --accent: #8a3b12; }
* { box-sizing: border-box; }
body { margin: 0; font: 16px/1.45 "Segoe UI", sans-serif; color: var(--ink); background: var(--paper); }
body:not(.desk) { min-height: 100vh; display: flex; flex-direction: column; }
body:not(.desk) main { flex: 1 0 auto; }
.top { display: flex; justify-content: space-between; align-items: baseline; padding: 16px 28px; border-bottom: 1px solid var(--line); background: var(--card); }
.brand { color: inherit; text-decoration: none; font-weight: 650; letter-spacing: .02em; }
.brand span { color: var(--accent); font-weight: 500; }
nav a { color: var(--ink); }
main { max-width: 1080px; margin: 0 auto; padding: 24px; }
.card { background: var(--card); border: 1px solid var(--line); padding: 20px 22px; margin-bottom: 16px; }
.narrow { max-width: 640px; }
h1 { font-size: 1.45rem; margin: 0 0 8px; }
h2 { font-size: 1.15rem; margin: 0 0 8px; }
.muted { color: #5c564c; }
label { display: flex; flex-direction: column; gap: 4px; font-size: .92rem; }
input, select, textarea { font: inherit; padding: 7px 8px; border: 1px solid var(--line); background: #fff; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px 16px; margin: 12px 0; }
.check { flex-direction: row; align-items: center; gap: 8px; }
fieldset { border: 1px solid var(--line); margin: 0; }
button { background: #141414; color: #fff; border: 0; padding: 10px 16px; font: inherit; cursor: pointer; }
table { width: 100%; border-collapse: collapse; font-size: .92rem; }
th, td { text-align: left; padding: 6px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
tr.fail td { background: #fbecea; }
.fail { color: #8d1d14; }
.ok { color: #1d5a32; }
.sketch { width: 100%; height: 160px; background: #fbfaf7; border: 1px solid var(--line); }
.sketch line, .sketch path { stroke: var(--ink); fill: var(--ink); }
body.desk main { max-width: none; margin: 0; padding: 0; }
body.desk .top { display: none; }
.menu { display: flex; gap: 18px; padding: 8px 16px; background: #fff; border-bottom: 1px solid var(--line); font-size: 14px; }
.menu a { color: #1c1915; text-decoration: none; }
.work { display: grid; grid-template-columns: 260px 6px minmax(420px, 1fr) 6px 360px; height: calc(100vh - 36px); background: var(--paper); }
.pane { min-width: 0; min-height: 0; overflow: auto; padding: 8px; }
.pane.side { background: #fff; border: 1px solid var(--line); }
.disp-title { font-size: 11px; color: #666; }
.calc-item { display: flex; justify-content: space-between; gap: 8px; padding: 6px 4px; background: #fff; border: 1px solid var(--line); margin-top: 8px; }
.badge { font-size: 11px; padding: 0 6px; border-radius: 3px; }
.badge.ok { background: #DCF2DC; }
.badge.bad { background: #F6C9C9; }
.badge.wait { background: #E4E7EB; }
.summary { background: var(--paper); border: 1px solid var(--line); padding: 8px 10px; margin-bottom: 6px; }
.summary h1 { font-size: 15px; margin: 0; }
.grid-wrap { overflow: auto; border: 1px solid var(--line); max-height: 38vh; }
table.vars { width: 100%; border-collapse: collapse; font-size: 12px; }
table.vars th, table.vars td { border-bottom: 1px solid var(--line); padding: 2px 4px; white-space: nowrap; }
table.vars th { background: #f7f7f7; font-weight: 600; text-align: center; position: sticky; top: 0; }
table.vars tr.pick { outline: 1px solid #141414; }
table.vars tr.rec { font-weight: 650; }
table.vars td.num { text-align: right; }
td.ok, .cell.ok { background: #DCF2DC; }
td.near, .cell.near { background: #FFF1B8; }
td.bad, .cell.bad { background: #F6C9C9; }
.verdict.ok { background: #DCF2DC; }
.verdict.bad { background: #F6C9C9; }
.beam { width: 100%; height: 200px; border: 1px solid var(--line); background: #fff; display: block; }
.detail-head { font-size: 14px; font-weight: 650; margin: 6px 0; }
table.checks { width: 100%; border-collapse: collapse; font-size: 12px; }
table.checks td, table.checks th { border-bottom: 1px solid var(--line); padding: 3px 6px; vertical-align: top; }
.params label { font-size: 12px; color: #333; margin-top: 6px; }
.params input, .params select { font: 13px "Segoe UI", sans-serif; padding: 3px 6px; border: 1px solid var(--line); width: 100%; }
.params .check { flex-direction: row; align-items: center; gap: 8px; margin-top: 6px; }
.params .check input { width: 16px; height: 16px; flex: 0 0 16px; padding: 0; margin: 0; }
.scheme-edit { margin: 8px 0 12px; }
.scheme-row { display: grid; grid-template-columns: 72px 1fr 64px; gap: 8px; align-items: center; margin-top: 4px; font-size: 12px; }
.scheme-row input[type="range"] { width: 100%; padding: 0; accent-color: #141414; }
.scheme-row input[type="number"] { width: 64px; }
.beam .grip { cursor: ew-resize; }
.disp-tools { display: flex; gap: 4px; margin: 8px 0; }
.disp-tools button { padding: 4px 8px; font-size: 12px; }
.calc-item { cursor: pointer; }
.calc-item.on { outline: 1px solid #141414; }
.pair { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
details { border-bottom: 1px solid #e4e4e4; padding: 4px 0 8px; }
details > summary { cursor: pointer; font-weight: 650; }
.go { height: 40px; width: 100%; margin-top: 8px; font-size: 14px; font-weight: 650; }
.hint { color: #777; font-size: 11px; margin: 2px 0 0; }
.note { margin-top: 12px; padding: 8px; border: 1px solid var(--line); background: var(--paper); }
.note textarea { width: 100%; font: inherit; }
input.need, select.need { border-color: #b42318 !important; background: #fdecea !important; box-shadow: 0 0 0 1px #b42318; }
label:has(.need) { color: #b42318; }
.center { display: flex; flex-direction: column; min-height: 0; }
.center .grid-wrap { flex: 1; }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 10px; }
.stats div { border: 1px solid var(--line); padding: 10px 12px; }
.stats b { display: block; font-size: 1.4rem; }
.stats span, .muted { color: #5c564c; }
.row, .tools { display: flex; gap: 16px; align-items: center; justify-content: space-between; flex-wrap: wrap; }
.tools form { margin: 0; }
button.quiet { background: transparent; color: var(--ink); border: 1px solid var(--line); }
nav { display: flex; gap: 14px; }
.foot { margin-top: auto; padding: 24px 28px 28px; color: #5c564c; font-size: 14px; line-height: 1.45; }
.foot p { margin: 0; }
body.desk .foot { display: none; }
body.welcome { background: #141414; color: #f4f1ea; min-height: 100vh; }
body.welcome .foot { color: #8a847a; padding: 24px 48px 36px; }
body.welcome .top { background: transparent; border: 0; padding: 28px 48px 8px; }
body.welcome .brand, body.welcome nav a { color: #f4f1ea; text-decoration: none; letter-spacing: .04em; }
body.welcome nav a { color: #b9b3a8; }
body.welcome main { max-width: 1120px; padding: 28px 48px 72px; }
body.welcome .card { background: transparent; border: 0; border-bottom: 1px solid #2a2a2a; color: inherit; padding: 8px 0 28px; overflow-x: auto; }
body.welcome .muted, body.welcome .stats span { color: #b9b3a8; }
body.welcome main a { color: #c6a15b; }
body.welcome th, body.welcome td { border-bottom-color: #333; }
body.welcome input, body.welcome select, body.welcome textarea { background: #1c1c1c; color: #f4f1ea; border-color: #3a3a3a; }
body.welcome button { background: #f4f1ea; color: #141414; }
body.welcome .actions button { background: #141414; color: #f4f1ea; border: 1px solid #f4f1ea; }
body.welcome button.quiet { background: transparent; color: #f4f1ea; border-color: #3a3a3a; }
body.welcome .stats div { border-color: #3a3a3a; }
body.welcome .fail { color: #f0b4ae; }
.hero { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(280px, .85fr); gap: 72px; align-items: start; padding-top: 48px; }
.eyebrow { margin: 0 0 18px; color: #c6a15b; letter-spacing: .16em; text-transform: uppercase; font-size: 12px; }
.hero h1 { font-weight: 400; font-size: clamp(36px, 4.4vw, 56px); line-height: 1.08; letter-spacing: -.03em; margin: 0 0 20px; max-width: 16ch; }
.actions { display: flex; flex-direction: column; align-items: flex-start; gap: 14px; margin-top: 8px; }
.actions form { display: flex; gap: 8px; flex-wrap: wrap; }
.actions input { background: #1c1c1c; color: #f4f1ea; border: 1px solid #3a3a3a; min-width: 180px; }
.btn, .actions button { background: #f4f1ea; color: #141414; text-decoration: none; padding: 10px 16px; border: 0; cursor: pointer; font: inherit; }
.actions a.btn, .actions button { background: #141414; color: #f4f1ea; border: 1px solid #f4f1ea; }
.lead { color: #d9d3c7; font-size: 18px; max-width: 36ch; margin: 0 0 28px; }
.schemes { list-style: none; margin: 0; padding: 0 0 0 16px; border-left: 2px solid #c6a15b; }
.schemes li { padding: 6px 0; color: #f4f1ea; }
.hero-side, .aside-note { color: #b9b3a8; }
.hero-side p, .aside-note { margin: 0 0 16px; }
.hero-links { display: flex; gap: 18px; }
.hero-links a { color: #f4f1ea; }
.gate { background: #1c1c1c; border-top: 2px solid #c6a15b; padding: 28px 24px; display: flex; flex-direction: column; gap: 12px; }
.gate h2 { margin: 0; font-weight: 500; }
.gate p { margin: 0; color: #b9b3a8; font-size: 14px; }
.gate label { color: #f4f1ea; }
.gate input { background: #141414; color: #f4f1ea; border-color: #3a3a3a; }
.gate .check { color: #d9d3c7; align-items: flex-start; }
.gate .check span { flex: 1; line-height: 1.4; }
.gate a, .gate .check a { color: #c6a15b; }
.gate button { margin-top: 8px; background: #f4f1ea; color: #141414; }
.gate .fail { color: #f0b4ae; }
.doc { max-width: 760px; }
.doc h1 { font-size: 2rem; font-weight: 500; letter-spacing: -.02em; }
.doc p, .doc li { max-width: 68ch; }
@media (max-width: 800px) {
  body.welcome .top, body.welcome main, body.welcome .foot { padding-left: 20px; padding-right: 20px; }
  .hero { grid-template-columns: 1fr; gap: 36px; padding-top: 12px; }
}