:root {
  --bg: #f6f4ef;
  --card: #fffdf8;
  --ink: #1c1b18;
  --muted: #625e53;
  --line: #e2ddd0;
  --accent: #1d5c4d;
  --accent-ink: #fff;
  --ok: #1d5c4d;
  --ok-bg: #e6f0ec;
  --warn: #8a5a00;
  --warn-bg: #fbf1da;
  --stop: #9b2c1f;
  --stop-bg: #f9e7e3;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
.wrap { max-width: 720px; margin: 0 auto; padding: 0 16px; }
.top { padding: 16px 0 2px; }
.brand { margin: 0 0 8px; font-weight: 650; letter-spacing: .01em; display: flex; align-items: center; gap: 8px; }
.ring-mark { width: 18px; height: 18px; border: 4px solid var(--accent); border-radius: 50%; display: inline-block; }
.tag { font: 500 11px/1 var(--mono); text-transform: uppercase; letter-spacing: .08em; color: var(--muted); border: 1px solid var(--line); padding: 4px 6px; border-radius: 4px; }
h1 { font-size: clamp(1.3rem, 4.8vw, 1.9rem); line-height: 1.15; margin: 0 0 6px; letter-spacing: -.01em; text-wrap: balance; }
.lede { margin: 0 0 4px; color: var(--muted); max-width: 60ch; font-size: .95rem; }
h2 { font-size: 1.1rem; margin: 0 0 12px; display: flex; align-items: center; gap: 10px; }
.num { width: 26px; height: 26px; border-radius: 50%; background: var(--ink); color: var(--bg); font: 600 13px/26px var(--mono); text-align: center; flex: none; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 18px; margin: 14px 0; }
.card p { margin: 0 0 10px; }
.fine { font-size: .875rem; color: var(--muted); }
a { color: var(--accent); }

.sheet-row { display: grid; grid-template-columns: 150px 1fr; gap: 16px; align-items: center; margin-top: 8px; }
.sheet-art { width: 100%; height: auto; display: block; }
@media (max-width: 480px) { .sheet-row { grid-template-columns: 1fr; } .sheet-art { max-width: 220px; } }

.steps { margin: 0; padding-left: 1.2em; }
.steps li { margin: 0 0 6px; }

.btn-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 0; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 18px;
  border-radius: 10px; border: 1px solid var(--line); background: #fff; color: var(--ink);
  font: 600 1rem/1.2 inherit; text-decoration: none; cursor: pointer; -webkit-tap-highlight-color: transparent;
}
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); width: 100%; min-height: 56px; font-size: 1.05rem; margin-bottom: 10px; }
.btn.ghost { font-weight: 550; font-size: .95rem; }
.btn.small { min-height: 40px; padding: 0 12px; font-size: .875rem; }
.btn:focus-visible, summary:focus-visible, .btn:has(input:focus-visible) { outline: 3px solid #7fb3a4; outline-offset: 2px; }
.btn[aria-disabled="true"] { opacity: .6; pointer-events: none; }
.samples { border-top: 1px solid var(--line); padding-top: 12px; }
.samples .fine { margin-bottom: 8px; }

/* start screen: three steps and the upload button fit on one phone screen */
.start { padding: 6px 16px 14px; margin-top: 10px; }
.flow { list-style: none; margin: 0; padding: 0; }
.flow > li { display: grid; grid-template-columns: 26px 1fr; gap: 12px; padding: 12px 0; border-top: 1px solid var(--line); }
.flow > li:first-child { border-top: 0; }
.flow h2 { display: block; font-size: 1.02rem; line-height: 26px; margin: 0 0 2px; }
.flow p { margin: 0 0 8px; }
.flow > li > div > :last-child { margin-bottom: 0; }
.flow .btn.primary { margin-top: 4px; margin-bottom: 8px; }
.flow details.inline { border: 0; padding: 0; }
.flow details.inline summary { font-weight: 550; font-size: .9rem; color: var(--accent); padding: 0; }
.privacy { margin: 10px 0 0 !important; }
@media (max-width: 480px) { .top .lede { display: none; } .start { padding-top: 2px; } .flow > li { padding: 10px 0; } }
.has-result #start, .has-result .top h1, .has-result .top .lede { display: none; }
.has-result .top { padding-top: 12px; }
.has-result .brand { margin-bottom: 0; }
.res-bar { display: flex; gap: 8px; margin-bottom: 12px; }
.res-bar .btn { flex: 1 1 0; width: auto; min-height: 44px; margin: 0; padding: 0 10px; font-size: .9rem; font-weight: 600; text-align: center; }
.checks-d { border-top: 1px solid var(--line); padding: 8px 0; margin-bottom: 6px; }
.checks-d summary { font-size: .92rem; }
.checks-d .checks { margin: 6px 0 0; }
.reference > h2 { margin-bottom: 4px; }

details { border-top: 1px solid var(--line); padding: 10px 0; }
details:first-of-type { border-top: 0; }
.card > details:last-child { padding-bottom: 0; }
summary { cursor: pointer; font-weight: 600; padding: 4px 0; }
details ul, details ol { margin: 8px 0; padding-left: 1.2em; }
details li { margin-bottom: 5px; }

/* result */
.result { margin-top: 10px; padding: 14px; }
.verdict { display: flex; gap: 12px; align-items: flex-start; padding: 12px 14px; border-radius: 10px; margin-bottom: 12px; }
.verdict.ok { background: var(--ok-bg); }
.verdict.retake { background: var(--stop-bg); }
.verdict.choose { background: var(--warn-bg); }
.verdict .ico { font: 700 15px/28px var(--mono); width: 28px; height: 28px; border-radius: 50%; text-align: center; flex: none; color: #fff; }
.verdict.ok .ico { background: var(--ok); } .verdict.retake .ico { background: var(--stop); } .verdict.choose .ico { background: var(--warn); }
.verdict h3 { margin: 0 0 2px; font-size: 1.05rem; }
.verdict p { margin: 0; }
.big { font: 600 clamp(2rem, 9vw, 2.8rem)/1.05 var(--mono); letter-spacing: -.02em; margin: 2px 0 4px; }
.big small { display: block; white-space: nowrap; margin-top: 4px; font-size: .45em; font-weight: 500; color: var(--muted); letter-spacing: 0; }
.sizes { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 0 0 14px; }
.size { border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; background: #fff; }
.size .k { font-size: .78rem; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; }
.size .v { font: 600 1.5rem/1.2 var(--mono); }
.size .r { font-size: .85rem; color: var(--muted); }
.views { display: grid; grid-template-columns: 1.5fr 1fr; gap: 10px; margin-bottom: 6px; }
@media (max-width: 480px) { .views { grid-template-columns: 1fr; } }
.views figure { margin: 0; }
.views canvas { width: 100%; height: auto; display: block; border-radius: 8px; border: 1px solid var(--line); background: #ddd; touch-action: manipulation; }
.views figcaption { font-size: .8rem; color: var(--muted); margin-top: 4px; }
.legend { display: flex; flex-wrap: wrap; gap: 4px 14px; font-size: .82rem; color: var(--muted); margin: 6px 0 14px; }
.legend i { display: inline-block; width: 14px; height: 3px; vertical-align: middle; margin-right: 5px; border-radius: 2px; }
.notes { margin: 0 0 14px; padding: 10px 12px 10px 30px; background: var(--warn-bg); border-radius: 10px; font-size: .92rem; }
.notes li { margin-bottom: 4px; }
.checks { width: 100%; border-collapse: collapse; font-size: .9rem; margin-bottom: 12px; }
.checks td { padding: 6px 4px; border-top: 1px solid var(--line); vertical-align: top; }
.checks td:nth-child(2) { font-family: var(--mono); white-space: nowrap; text-align: right; }
.checks td:nth-child(3) { text-align: right; width: 4.5em; font-weight: 600; }
.pass { color: var(--ok); } .warn { color: var(--warn); } .fail { color: var(--stop); }
.meter { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }

.meter > div { border: 1px dashed var(--line); border-radius: 10px; padding: 8px 12px; }
.meter .k { font-size: .78rem; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; }
.meter .v { font: 600 1.05rem/1.3 var(--mono); }
.meter .d { font-size: .8rem; color: var(--muted); }
.busy { display: flex; align-items: center; gap: 12px; }
.spin { width: 22px; height: 22px; border: 3px solid var(--line); border-top-color: var(--accent); border-radius: 50%; animation: sp 0.8s linear infinite; }
@keyframes sp { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .spin { animation: none; } }

.table-scroll { overflow-x: auto; max-height: 320px; border: 1px solid var(--line); border-radius: 8px; }
table#sizeTable { border-collapse: collapse; width: 100%; font: .85rem/1.3 var(--mono); }
#sizeTable th, #sizeTable td { padding: 6px 10px; text-align: right; border-bottom: 1px solid var(--line); white-space: nowrap; }
#sizeTable th { position: sticky; top: 0; background: var(--card); font-family: system-ui, sans-serif; font-size: .78rem; }
#sizeTable tr.hit td { background: var(--ok-bg); font-weight: 700; }
.foot { color: var(--muted); font-size: .8rem; padding-bottom: 32px; }