/* 3D Print My STL
   Light, quiet and typographic. The brand is monochrome; colour is reserved
   almost entirely for results, so a red or amber panel actually means
   something. Distinct from 3D Guru (blue on cream) and 3D Print My Parts
   (burnt orange on grey) without reaching for a neon accent. */

:root{
  --bg:#f7f7f5;
  --surface:#fff;
  --raised:#fcfcfb;
  --line:#e7e7e2;
  --line-soft:#f0f0ec;
  --ink:#17171b;
  --ink-2:#3f3f48;
  --muted:#6d6d78;
  --faint:#9a9aa4;

  --ok:#0b7a58;   --ok-bg:#e8f5f0;  --ok-line:#bfe3d6;
  --warn:#9a6212; --warn-bg:#fcf3e5; --warn-line:#eed9b4;
  --bad:#b4322a;  --bad-bg:#fdeeec;  --bad-line:#f3ccc8;

  --r-lg:18px; --r-md:12px; --r-sm:9px;
  --sh-1:0 1px 2px rgba(20,20,28,.05);
  --sh-2:0 1px 3px rgba(20,20,28,.06),0 10px 28px -14px rgba(20,20,28,.22);
  --sh-3:0 2px 6px rgba(20,20,28,.07),0 20px 48px -20px rgba(20,20,28,.28);
  --num:ui-monospace,"SF Mono",SFMono-Regular,Menlo,Consolas,monospace;
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  background:var(--bg);color:var(--ink);
  font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  font-size:16px;line-height:1.62;letter-spacing:-.006em;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
.prose a,.ft a,.find a,.note a{text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px;text-decoration-color:#c9c9d2}
.prose a:hover,.ft a:hover,.note a:hover{text-decoration-color:var(--ink)}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}
.narrow{max-width:720px}

/* ── header ─────────────────────────────────────────────── */
header{background:#f7f7f5e6;backdrop-filter:saturate(180%) blur(10px);
  border-bottom:1px solid var(--line-soft);position:sticky;top:0;z-index:50}
.hd{display:flex;align-items:center;justify-content:space-between;gap:20px;height:68px}
.mark{display:flex;align-items:center;gap:10px;font-weight:640;font-size:16.5px;letter-spacing:-.02em}
.mark svg{display:block;flex:0 0 auto}
.mark b{font-weight:640;color:var(--muted)}
nav.top{display:flex;gap:26px;align-items:center;font-size:14.5px;color:var(--muted)}
nav.top a{transition:color .15s}
nav.top a:hover,nav.top a.on{color:var(--ink)}
.runby{font-size:13px;color:var(--faint);padding-left:20px;border-left:1px solid var(--line)}
@media(max-width:820px){nav.top .hide-sm,.runby{display:none}nav.top{gap:18px}}

/* ── hero + tool ────────────────────────────────────────── */
.tool{padding:72px 0 30px}
h1{font-size:clamp(34px,5.2vw,54px);line-height:1.06;letter-spacing:-.032em;font-weight:660;margin-bottom:18px}
h1 span{color:var(--faint)}
.sub{color:var(--ink-2);font-size:18.5px;line-height:1.55;max-width:560px;margin-bottom:30px;letter-spacing:-.01em}

.drop{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--sh-2);padding:54px 28px;text-align:center;cursor:pointer;
  transition:box-shadow .18s,transform .18s,border-color .18s;
}
.drop:hover{box-shadow:var(--sh-3);transform:translateY(-1px)}
.drop.over{border-color:var(--ink);box-shadow:var(--sh-3)}
.drop .ic{margin:0 auto 16px;width:44px;height:44px;border-radius:13px;background:var(--bg);
  border:1px solid var(--line);display:flex;align-items:center;justify-content:center}
.drop h3{font-size:19px;font-weight:620;letter-spacing:-.018em;margin-bottom:5px}
.drop p{color:var(--muted);font-size:14.5px}
.reassure{display:flex;align-items:center;justify-content:center;gap:8px;
  margin-top:18px;font-size:13.5px;color:var(--muted)}
.reassure svg{flex:0 0 auto;opacity:.6}
.err{color:var(--bad);font-size:14.5px;margin-top:16px;display:none}

/* ── results ────────────────────────────────────────────── */
#out{display:none;padding-bottom:72px}
.verdict{display:flex;gap:15px;border-radius:var(--r-lg);padding:20px 24px;margin:30px 0 22px;
  border:1px solid;align-items:flex-start}
.verdict .ico{flex:0 0 auto;margin-top:1px}
.verdict h2{font-size:19px;font-weight:640;letter-spacing:-.02em;line-height:1.35;margin-bottom:2px}
.verdict p{font-size:14.5px;color:var(--ink-2);line-height:1.5}
.v-pass{background:var(--ok-bg);border-color:var(--ok-line)}   .v-pass h2{color:var(--ok)}
.v-warn{background:var(--warn-bg);border-color:var(--warn-line)}.v-warn h2{color:var(--warn)}
.v-fail{background:var(--bad-bg);border-color:var(--bad-line)}  .v-fail h2{color:var(--bad)}

.cols{display:grid;grid-template-columns:minmax(0,1fr) 348px;gap:22px;align-items:start}
@media(max-width:900px){.cols{grid-template-columns:1fr}}
.stack{display:grid;gap:22px;min-width:0}

.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--sh-1);overflow:hidden}
.panel-h{padding:15px 20px;display:flex;justify-content:space-between;align-items:center;gap:12px;
  border-bottom:1px solid var(--line-soft)}
.panel-h h3{font-size:14.5px;font-weight:620;letter-spacing:-.015em}
.panel-b{padding:20px}

#view{width:100%;height:400px;display:block;background:
  radial-gradient(120% 90% at 50% 0%,#fff 0%,#f2f2ef 70%,#ececE8 100%)}
.viewbar{display:flex;gap:3px;background:var(--bg);border:1px solid var(--line);
  border-radius:8px;padding:3px}
.viewbar button{background:none;border:0;color:var(--muted);font-family:inherit;
  font-size:12px;font-weight:560;padding:4px 10px;border-radius:6px;cursor:pointer;transition:.15s}
.viewbar button:hover{color:var(--ink)}
.viewbar button.on{background:var(--surface);color:var(--ink);box-shadow:var(--sh-1)}
.viewhint{font-size:13px;color:var(--muted);padding:12px 20px;border-top:1px solid var(--line-soft);
  display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;background:var(--raised)}
.viewhint .key{color:var(--bad);font-weight:600}

.stats{display:grid;grid-template-columns:1fr 1fr}
.stat{padding:15px 20px;border-bottom:1px solid var(--line-soft)}
.stat:nth-child(even){border-left:1px solid var(--line-soft)}
/* Dimensions are the longest value, so give them the full width rather than
   letting "mm" wrap onto its own line. */
.stat:first-child{grid-column:1/-1;border-left:0}
.stat:nth-last-child(-n+2){border-bottom:0}
.stat .k{font-size:12.5px;color:var(--muted);margin-bottom:2px}
.stat .v{font-size:17px;font-weight:600;letter-spacing:-.024em;font-variant-numeric:tabular-nums}
.stat .v small{color:var(--faint);font-size:12.5px;font-weight:500;letter-spacing:0}

.find{display:flex;gap:14px;padding:17px 20px;border-bottom:1px solid var(--line-soft)}
.find:last-child{border-bottom:0}
.find .ico{flex:0 0 auto;margin-top:2px}
.find h4{font-size:15.5px;font-weight:600;letter-spacing:-.014em;margin-bottom:3px}
.find p{font-size:14.5px;color:var(--ink-2);line-height:1.55}
.find .fix{font-size:14px;color:var(--muted);margin-top:6px}
.find .fix b{color:var(--ink-2);font-weight:600}

/* quality + estimate */
.qual{display:flex;gap:3px;background:var(--bg);border:1px solid var(--line);
  border-radius:10px;padding:3px;margin-bottom:18px}
.qual button{flex:1;background:none;border:0;color:var(--muted);padding:8px 4px;border-radius:7px;
  cursor:pointer;font-family:inherit;font-size:13.5px;font-weight:560;transition:.15s}
.qual button:hover{color:var(--ink)}
.qual button.on{background:var(--surface);color:var(--ink);box-shadow:var(--sh-1)}
.est{display:flex;justify-content:space-between;align-items:baseline;padding:10px 0;
  border-bottom:1px solid var(--line-soft);font-size:14.5px}
.est .k{color:var(--muted)}
.est .v{font-weight:600;font-variant-numeric:tabular-nums;letter-spacing:-.02em}
.est-total{border-bottom:0;padding-top:14px}
.est-total .v{font-size:24px;letter-spacing:-.032em}

.btn{display:block;width:100%;text-align:center;padding:13px 20px;border-radius:10px;
  font-weight:600;font-size:15px;cursor:pointer;border:1px solid transparent;
  font-family:inherit;letter-spacing:-.01em;transition:.15s}
.btn-main{background:var(--ink);color:#fff;box-shadow:var(--sh-1)}
.btn-main:hover{background:#000;box-shadow:var(--sh-2)}
.btn-ghost{background:var(--surface);border-color:var(--line);color:var(--ink);margin-top:9px}
.btn-ghost:hover{border-color:#d2d2cb;background:var(--raised)}
.cta-note{font-size:12.5px;color:var(--faint);text-align:center;margin-top:12px;line-height:1.5}

.files{display:flex;flex-wrap:wrap;gap:8px;margin-top:26px}
.chip{display:flex;align-items:center;gap:8px;background:var(--surface);border:1px solid var(--line);
  border-radius:9px;padding:7px 13px;font-size:13.5px;cursor:pointer;transition:.15s;
  box-shadow:var(--sh-1);color:var(--ink-2)}
.chip:hover{border-color:#d2d2cb}
.chip.on{border-color:var(--ink);color:var(--ink);font-weight:560}
.chip .d{width:7px;height:7px;border-radius:99px;flex:0 0 auto}

/* ── content pages ──────────────────────────────────────── */
.page{padding:68px 0 80px}
.page h1{font-size:clamp(32px,4.4vw,44px);margin-bottom:16px}
.lead{font-size:19px;color:var(--ink-2);margin-bottom:40px;line-height:1.55;letter-spacing:-.012em}
.prose h2{font-size:23px;font-weight:640;letter-spacing:-.024em;margin:44px 0 12px}
.prose h3{font-size:17px;font-weight:620;letter-spacing:-.015em;margin:28px 0 7px}
.prose p{color:var(--ink-2);margin-bottom:15px}
.prose ul,.prose ol{color:var(--ink-2);margin:0 0 18px 22px}
.prose li{margin-bottom:8px}
.prose strong{color:var(--ink);font-weight:600}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:24px 26px;margin:26px 0;box-shadow:var(--sh-1)}
.card h3{margin-top:0}
.note{background:var(--surface);border:1px solid var(--line);border-left:3px solid var(--ink);
  border-radius:0 var(--r-md) var(--r-md) 0;padding:17px 22px;margin:26px 0;box-shadow:var(--sh-1)}
.note p{color:var(--ink-2);margin:0;font-size:15px}
table.spec{width:100%;border-collapse:collapse;margin:20px 0 28px;font-size:15px}
table.spec th,table.spec td{text-align:left;padding:14px 16px;border-bottom:1px solid var(--line-soft);vertical-align:top}
table.spec tr:first-child th,table.spec tr:first-child td{border-top:1px solid var(--line-soft)}
table.spec th{font-weight:600;width:32%;color:var(--ink)}
table.spec td{color:var(--ink-2)}

/* ── footer ─────────────────────────────────────────────── */
footer{border-top:1px solid var(--line);padding:44px 0;margin-top:24px;background:var(--raised)}
.ft{display:flex;justify-content:space-between;gap:34px;flex-wrap:wrap;font-size:14px;color:var(--muted)}
.ft .who{max-width:430px;line-height:1.65}
.ft .who strong{color:var(--ink);font-weight:600}
.ft .links{display:flex;gap:22px;flex-wrap:wrap}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}

/* ── nav CTA ─────────────────────────────────────────────── */
.nav-cta{background:var(--ink);color:#fff;padding:8px 16px;border-radius:8px;
  font-weight:560;font-size:14px;box-shadow:var(--sh-1);transition:.15s}
.nav-cta:hover{background:#000;box-shadow:var(--sh-2)}
@media(max-width:560px){.nav-cta{padding:7px 12px;font-size:13.5px}}

/* ── service ladder: check → fix → print ─────────────────── */
.ladder{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:40px}
@media(max-width:880px){.ladder{grid-template-columns:1fr}}
.rung{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:22px 24px;box-shadow:var(--sh-1);display:flex;flex-direction:column}
.rung.hero-rung{border-color:#d6d6cf;box-shadow:var(--sh-2)}
.rung-h{display:flex;align-items:center;gap:10px;margin-bottom:10px}
.rung-h h3{font-size:17px;font-weight:640;letter-spacing:-.018em;flex:1}
.step{width:23px;height:23px;border-radius:99px;background:var(--ink);color:#fff;
  font-size:12.5px;font-weight:600;display:flex;align-items:center;justify-content:center;flex:0 0 auto}
.price{font-size:14px;font-weight:620;letter-spacing:-.015em;white-space:nowrap}
.price.free{color:var(--ok)}
.rung p{font-size:14.5px;color:var(--ink-2);line-height:1.55;flex:1}
.rung-link{display:inline-block;margin-top:14px;font-size:14px;font-weight:560;
  border-bottom:1px solid #c9c9d2;padding-bottom:1px;align-self:flex-start}
.rung-link:hover{border-bottom-color:var(--ink)}

/* ── order band shown with the results ──────────────────── */
.act{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--sh-2);padding:22px 26px;margin-bottom:22px;
  display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap}
.act-copy{flex:1;min-width:260px}
.act-copy h3{font-size:18px;font-weight:640;letter-spacing:-.02em;margin-bottom:3px}
.act-copy p{font-size:14.5px;color:var(--ink-2);line-height:1.5}
.act-btns{display:flex;gap:10px;flex-wrap:wrap}
.act-btns .btn{width:auto;padding:12px 22px;white-space:nowrap}

/* ── marketing sections ─────────────────────────────────── */
.sec-h{font-size:26px;font-weight:650;letter-spacing:-.026em;margin:56px 0 8px}
.sec-sub{font-size:16.5px;color:var(--ink-2);max-width:620px;margin-bottom:24px;line-height:1.55}
.specs{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
@media(max-width:880px){.specs{grid-template-columns:repeat(2,1fr)}}
@media(max-width:480px){.specs{grid-template-columns:1fr}}
.spec{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  padding:18px 20px;box-shadow:var(--sh-1)}
.spec .k{font-size:12.5px;color:var(--muted);margin-bottom:3px}
.spec .v{font-size:23px;font-weight:650;letter-spacing:-.03em;margin-bottom:6px}
.spec .n{font-size:13.5px;color:var(--muted);line-height:1.5}
.price-tbl{width:100%;border-collapse:collapse;font-size:15.5px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;box-shadow:var(--sh-1)}
.price-tbl th,.price-tbl td{text-align:left;padding:15px 20px;border-bottom:1px solid var(--line-soft)}
.price-tbl tr:last-child th,.price-tbl tr:last-child td{border-bottom:0}
.price-tbl th{font-weight:600;width:42%}
.price-tbl td{color:var(--ink-2)}
.why{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
@media(max-width:880px){.why{grid-template-columns:1fr}}
.why-i h3{font-size:16.5px;font-weight:620;letter-spacing:-.016em;margin-bottom:6px}
.why-i p{font-size:14.5px;color:var(--ink-2);line-height:1.6}
.band{background:var(--ink);color:#fff;border-radius:var(--r-lg);padding:30px 34px;margin:52px 0 0;
  display:flex;align-items:center;justify-content:space-between;gap:26px;flex-wrap:wrap}
.band h3{font-size:21px;font-weight:640;letter-spacing:-.024em;margin-bottom:4px}
.band p{font-size:15px;color:#b9b9c2;max-width:520px;line-height:1.55}
.band-btn{width:auto;background:#fff;color:var(--ink);padding:13px 26px;white-space:nowrap}
.band-btn:hover{background:#f0f0ec}