:root {
  --bg: #f4f5f1; --surface: #ffffff; --ink: #1a1f1c; --muted: #565f59; --line: #d9ddd6;
  --accent: #0e6b5a; --accent-ink: #ffffff; --accent-soft: #e0eeea; --good: #1b7a44; --warn: #9a4f06; --bad: #b3261e;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #111513; --surface: #1a201d; --ink: #e8ece9; --muted: #9aa59e; --line: #2c3530;
    --accent: #4fc3ab; --accent-ink: #06201a; --accent-soft: #1b2b27; --good: #5fd08c; --warn: #e8a25a; --bad: #f2877f;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.6 var(--font); }
a { color: var(--accent); }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.wrap { width: 100%; max-width: 1000px; margin: 0 auto; padding-inline: max(16px, env(safe-area-inset-left, 0px)); }
.skip { position: absolute; left: -999px; top: 0; background: var(--accent); color: var(--accent-ink); padding: 8px 12px; z-index: 50; }
.skip:focus { left: 8px; top: 8px; }

.site-header { border-bottom: 1px solid var(--line); background: var(--surface); }
.site-header .wrap { display: flex; flex-wrap: wrap; gap: 8px 24px; align-items: center; justify-content: space-between; padding-block: 12px; }
.logo { font-weight: 800; font-size: 20px; letter-spacing: -0.02em; text-decoration: none; color: var(--ink); }
.logo b { color: var(--accent); }
.site-header nav { display: flex; flex-wrap: wrap; gap: 4px 18px; }
.site-header nav a { color: var(--ink); text-decoration: none; font-weight: 500; font-size: 15px; }
.site-header nav a:hover { color: var(--accent); }

main { padding-block: 28px 56px; display: flex; flex-direction: column; gap: 32px; }
.crumbs { font-size: 13px; color: var(--muted); margin: 0; }
.crumbs a { color: var(--muted); }
h1 { font-size: clamp(28px, 5vw, 40px); line-height: 1.12; letter-spacing: -0.02em; margin: 0 0 10px; text-wrap: balance; }
h2 { font-size: 22px; line-height: 1.25; margin: 0 0 12px; letter-spacing: -0.01em; }
h3 { font-size: 16px; margin: 0 0 8px; }
.lead { color: var(--muted); font-size: 18px; margin: 0; max-width: 62ch; }
.hero { display: flex; flex-direction: column; gap: 6px; }

.tool { display: flex; flex-direction: column; gap: 16px; }
.layout { display: grid; grid-template-columns: 290px minmax(0, 1fr); gap: 20px; align-items: start; }
@media (max-width: 760px) { .layout { grid-template-columns: minmax(0, 1fr); } .layout .right { order: -1; } }
.panel, .card { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 16px; min-width: 0; }
.panel { display: flex; flex-direction: column; gap: 18px; }
fieldset { border: 0; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 8px; min-width: 0; }
legend, .label { font-size: 11px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); padding: 0; margin-bottom: 8px; display: flex; justify-content: space-between; width: 100%; }
.seg { display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.seg4 { grid-template-columns: repeat(4, 1fr); }
.seg label { position: relative; text-align: center; padding: 8px 0; font-weight: 600; font-size: 14px; cursor: pointer; border-right: 1px solid var(--line); }
.seg label:last-child { border-right: 0; }
.seg input { position: absolute; opacity: 0; inset: 0; cursor: pointer; margin: 0; }
.seg label:has(input:checked) { background: var(--accent); color: var(--accent-ink); }
.seg label:has(input:focus-visible) { outline: 2px solid var(--accent); outline-offset: -3px; }
.seg label:has(input:disabled) { opacity: 0.4; cursor: not-allowed; }
input[type="range"] { width: 100%; accent-color: var(--accent); }
.hint { margin: 0; color: var(--muted); font-size: 13px; }
.hint.ok, .ok { color: var(--good); } .hint.bad, .bad { color: var(--bad); }
input[type="number"], input[type="text"], input[type="date"], select, textarea {
  width: 100%; min-width: 0; font: 500 15px var(--font); color: var(--ink); background: var(--bg);
  border: 1px solid var(--line); border-radius: 8px; padding: 9px 10px;
}
textarea { font: 14px/1.5 var(--mono); resize: vertical; min-height: 220px; }
input[type="color"] { width: 44px; height: 36px; padding: 2px; border: 1px solid var(--line); border-radius: 8px; background: var(--bg); }
.dims { display: grid; grid-template-columns: 1fr auto 1fr; gap: 8px; align-items: center; color: var(--muted); }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { font: 500 12px var(--mono); background: transparent; color: var(--ink); border: 1px solid var(--line); border-radius: 999px; padding: 4px 10px; cursor: pointer; }
.chip[aria-pressed="true"] { background: var(--accent-soft); border-color: var(--accent); color: var(--accent); }
.check { display: flex; gap: 8px; align-items: center; cursor: pointer; font-size: 14px; }
.check input { accent-color: var(--accent); width: 16px; height: 16px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field label { font-size: 13px; font-weight: 600; }
.grid2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.grid3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
@media (max-width: 480px) { .grid2 { grid-template-columns: minmax(0, 1fr); } }
.right { display: flex; flex-direction: column; gap: 16px; min-width: 0; }
.drop { position: relative; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 4px; text-align: center; border: 1.5px dashed var(--line); border-radius: 10px; padding: 30px 16px; background: var(--surface); cursor: pointer; }
.drop.over { border-color: var(--accent); background: var(--accent-soft); }
.drop strong { font-size: 18px; }
.drop span { color: var(--muted); font-size: 14px; }
.drop input { position: absolute; width: 1px; height: 1px; opacity: 0; }
.drop:focus-within { outline: 2px solid var(--accent); outline-offset: 2px; }
.summary { display: flex; flex-wrap: wrap; gap: 10px 16px; align-items: center; justify-content: space-between; }
.totals { font: 13px var(--mono); }
.totals b { color: var(--good); }
.btns { display: flex; gap: 8px; flex-wrap: wrap; }
button.btn { font: 600 14px var(--font); border-radius: 8px; padding: 9px 16px; cursor: pointer; background: var(--accent); color: var(--accent-ink); border: 1px solid var(--accent); }
button.btn.ghost { background: transparent; color: var(--ink); border-color: var(--line); }
button.btn.small { padding: 5px 10px; font-size: 13px; }
button.btn:disabled { opacity: 0.5; cursor: not-allowed; }
ul.list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.row { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 10px; display: grid; grid-template-columns: 72px minmax(0, 1fr) auto auto; gap: 6px 14px; align-items: center; }
.row-simple { grid-template-columns: minmax(0, 1fr) auto; }
.thumb { width: 72px; height: 56px; object-fit: cover; border-radius: 6px; background: var(--bg); border: 1px solid var(--line); display: block; }
.meta { min-width: 0; }
.name { margin: 0; font-weight: 600; overflow-wrap: anywhere; font-size: 15px; }
.sub { margin: 0; font: 12px var(--mono); color: var(--muted); }
.sizes { font: 13px var(--mono); display: flex; flex-wrap: wrap; gap: 4px 8px; align-items: center; justify-content: flex-end; }
.sizes .from { color: var(--muted); }
.badge { font-weight: 600; font-size: 12px; border-radius: 999px; padding: 2px 8px; background: var(--accent-soft); font-family: var(--font); }
.badge.good { color: var(--good); } .badge.warn { color: var(--warn); }
.actions { display: flex; gap: 6px; flex-wrap: wrap; }
@media (max-width: 560px) {
  .row { grid-template-columns: 72px minmax(0, 1fr); }
  .row-simple { grid-template-columns: minmax(0, 1fr); }
  .sizes, .actions { grid-column: 1 / -1; justify-content: flex-start; }
}
.inline { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.inline input { width: 110px; }
.result, .big { font-size: 28px; font-weight: 800; letter-spacing: -0.01em; margin: 10px 0 0; overflow-wrap: anywhere; }
.big { margin: 0 0 8px; } .big .unit { font-size: 15px; font-weight: 500; color: var(--muted); }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 10px; margin: 12px 0; }
.stats div { background: var(--bg); border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; }
.stats dt { font-size: 12px; color: var(--muted); } .stats dd { margin: 0; font: 600 18px var(--font); overflow-wrap: anywhere; }
.scale { position: relative; height: 12px; border-radius: 6px; margin: 14px 0 4px; background: linear-gradient(90deg, #5aa7d6 0 14%, #4cb782 14% 40%, #e3a93f 40% 60%, #d9694b 60% 100%); }
.scale .mark { position: absolute; top: -5px; width: 4px; height: 22px; background: var(--ink); border-radius: 2px; transform: translateX(-2px); }
.scale-labels { display: flex; justify-content: space-between; font: 11px var(--mono); color: var(--muted); }
.split { height: 12px; border-radius: 6px; background: var(--warn); overflow: hidden; margin: 12px 0 6px; }
.split span { display: block; height: 100%; background: var(--accent); }
.tablewrap { overflow-x: auto; margin-top: 14px; border: 1px solid var(--line); border-radius: 8px; max-height: 360px; }
table { border-collapse: collapse; width: 100%; font-size: 14px; font-variant-numeric: tabular-nums; }
th, td { padding: 8px 12px; text-align: right; border-bottom: 1px solid var(--line); white-space: nowrap; }
th:first-child, td:first-child { text-align: left; }
thead th { position: sticky; top: 0; background: var(--surface); font-size: 12px; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); }
.qrbox { display: flex; flex-direction: column; align-items: center; gap: 12px; }
#qcanvas { width: min(100%, 320px); height: auto; aspect-ratio: 1; border: 1px solid var(--line); border-radius: 8px; image-rendering: pixelated; }
.two { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
@media (max-width: 720px) { .two { grid-template-columns: minmax(0, 1fr); } }
.note { margin: 0; padding: 10px 12px; border-radius: 8px; background: var(--accent-soft); font-size: 14px; }

.prose { display: flex; flex-direction: column; gap: 28px; max-width: 70ch; }
.prose p { margin: 0 0 10px; }
.prose ol { margin: 0; padding-left: 22px; display: flex; flex-direction: column; gap: 6px; }
details { border: 1px solid var(--line); border-radius: 8px; background: var(--surface); padding: 12px 14px; }
details + details { margin-top: 8px; }
summary { cursor: pointer; font-weight: 600; }
details p { margin: 10px 0 0; color: var(--muted); }
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; }
.cards a.card { text-decoration: none; color: var(--ink); display: flex; flex-direction: column; gap: 4px; }
.cards a.card:hover { border-color: var(--accent); }
.cards a.card strong { color: var(--accent); } .cards a.card span { color: var(--muted); font-size: 14px; }
.site-footer { border-top: 1px solid var(--line); background: var(--surface); color: var(--muted); font-size: 14px; }
.site-footer .wrap { padding-block: 24px; display: flex; flex-wrap: wrap; gap: 10px 24px; justify-content: space-between; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 6px 18px; }
.site-footer a { color: var(--muted); }
#toast { position: fixed; left: 50%; transform: translateX(-50%); bottom: calc(16px + env(safe-area-inset-bottom, 0px)); background: var(--ink); color: var(--bg); padding: 9px 16px; border-radius: 8px; font-size: 14px; max-width: calc(100% - 32px); z-index: 40; }
[hidden] { display: none !important; }
@media (prefers-reduced-motion: no-preference) { .drop, .cards a.card { transition: background 0.15s, border-color 0.15s; } }