/* Inkmetry — a measuring instrument for handwriting.
   Identity: ink on paper, ruled-line blue as structure, proofreader red-orange for annotations,
   monospace numerals for the "instrument" feel. Everything sits on a writing-guide grid. */

:root{
  --paper:#FBFAF7;
  --paper-2:#F4F2EC;
  --ink:#1A1D26;
  --ink-soft:#3A3E4A;
  --rule:#4C6FB0;          /* baseline blue */
  --rule-faint:#C9D6EC;
  --xwash:#EAF0F8;
  --annot:#E4572E;         /* proofreader red-orange, annotations ONLY */
  --graphite:#6A6F7B;
  --good:#3F8F6B;
  --line:#E4E0D6;
  --shadow:0 1px 2px rgba(26,29,38,.06),0 12px 32px rgba(26,29,38,.07);
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,monospace;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Helvetica,Arial,sans-serif;
  --wrap:1080px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);
  line-height:1.5;-webkit-font-smoothing:antialiased;
  /* faint ruled-paper texture */
  background-image:linear-gradient(to bottom,transparent 27px,var(--rule-faint) 27px,transparent 28px);
  background-size:100% 28px;background-position:0 8px;
}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px}
a{color:var(--rule);text-decoration:none}
button{font-family:inherit}
h1,h2,h3{line-height:1.08;letter-spacing:-.02em;margin:0}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}

/* nav */
.nav{position:sticky;top:0;z-index:20;background:rgba(251,250,247,.86);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:60px}
.brand{display:flex;align-items:baseline;gap:10px;font-weight:800;font-size:20px;letter-spacing:-.03em}
.brand .tick{display:inline-block;width:16px;height:16px;border-bottom:2px solid var(--rule);
  border-left:2px solid var(--rule);transform:translateY(-2px)}
.nav .disc{font-size:12px;color:var(--graphite)}

/* buttons */
.btn{display:inline-flex;align-items:center;gap:9px;border:none;border-radius:10px;cursor:pointer;
  font-weight:650;font-size:15px;padding:13px 20px;transition:transform .08s ease, box-shadow .15s}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--ink);color:#fff}
.btn-primary:hover{box-shadow:var(--shadow)}
.btn-ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}
.btn-ghost:hover{border-color:var(--ink)}
.btn-annot{background:var(--annot);color:#fff}
.btn[disabled]{opacity:.5;cursor:not-allowed}

/* hero */
.hero{padding:64px 0 40px}
.eyebrow{font-family:var(--mono);font-size:12.5px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--rule);margin-bottom:18px}
.hero h1{font-size:clamp(34px,5.4vw,60px);font-weight:820;max-width:15ch}
.hero p.lead{font-size:clamp(17px,2.2vw,21px);color:var(--ink-soft);max-width:52ch;margin:20px 0 28px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.hero-note{font-size:13px;color:var(--graphite)}

.specimen{margin-top:44px;border:1px solid var(--line);border-radius:16px;background:#fff;
  box-shadow:var(--shadow);overflow:hidden;position:relative}
.specimen img{display:block;width:100%;height:auto}
.specimen .scan{position:absolute;top:0;bottom:0;width:36%;left:-40%;
  background:linear-gradient(90deg,transparent,rgba(76,111,176,.14),transparent);
  animation:scan 4.6s cubic-bezier(.5,.1,.5,.9) infinite}
.specimen .cap{position:absolute;left:14px;bottom:10px;font-family:var(--mono);font-size:11px;
  color:var(--graphite);background:rgba(255,255,255,.7);padding:2px 7px;border-radius:6px}
@keyframes scan{0%{left:-40%}60%,100%{left:110%}}

/* section scaffold */
.section{padding:52px 0;border-top:1px solid var(--line)}
.section-label{font-family:var(--mono);font-size:12px;letter-spacing:.12em;text-transform:uppercase;
  color:var(--graphite);margin-bottom:10px}
.section h2{font-size:clamp(24px,3.4vw,34px);font-weight:780;max-width:20ch;margin-bottom:8px}
.section .sub{color:var(--ink-soft);max-width:60ch}

/* steps: laid out like measured columns */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:30px}
.step{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px;box-shadow:var(--shadow)}
.step .n{font-family:var(--mono);font-size:13px;color:var(--rule);border-bottom:2px solid var(--rule);
  display:inline-block;padding-bottom:2px;margin-bottom:14px}
.step h3{font-size:18px;font-weight:720;margin-bottom:6px}
.step p{color:var(--ink-soft);font-size:15px;margin:0}

/* the flow / uploader */
.flow{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin-top:26px}
.card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:26px;box-shadow:var(--shadow)}
.card h3{font-size:19px;font-weight:740;margin-bottom:8px}
.card p.muted{color:var(--graphite);font-size:14.5px;margin:0 0 18px}
.drop{border:1.5px dashed var(--rule-faint);border-radius:12px;background:var(--paper);
  padding:34px 20px;text-align:center;cursor:pointer;transition:.15s}
.drop:hover,.drop.over{border-color:var(--rule);background:var(--xwash)}
.drop .big{font-weight:700;margin-bottom:4px}
.drop .small{font-size:13px;color:var(--graphite)}
.hidden{display:none!important}

/* result */
#result{margin-top:26px}
.result-head{display:flex;justify-content:space-between;align-items:flex-end;flex-wrap:wrap;gap:16px;
  padding-bottom:18px;border-bottom:1px solid var(--line)}
.rtype .k{font-family:var(--mono);font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--graphite)}
.rtype h2{font-size:clamp(26px,4vw,40px);font-weight:800;margin-top:4px}
.overall{text-align:right}
.overall .num{font-family:var(--mono);font-size:60px;font-weight:700;line-height:.9;letter-spacing:-.03em}
.overall .lab{font-size:12px;color:var(--graphite);font-family:var(--mono)}
.conf{font-family:var(--mono);font-size:12px;color:var(--graphite);margin-top:6px}

/* metric gauges = ruler with a tick */
.gauges{margin:22px 0}
.gauge{display:grid;grid-template-columns:150px 1fr 42px;align-items:center;gap:14px;padding:9px 0}
.gauge .name{font-size:14px}
.gauge .rail{position:relative;height:22px}
.gauge .rail:before{content:"";position:absolute;left:0;right:0;top:50%;height:2px;background:var(--rule-faint)}
.gauge .rail .ticks{position:absolute;inset:0}
.gauge .rail .ticks i{position:absolute;top:6px;width:1px;height:10px;background:var(--rule-faint)}
.gauge .rail .mark{position:absolute;top:2px;width:3px;height:18px;border-radius:2px;background:var(--ink);
  transition:left .6s cubic-bezier(.2,.7,.2,1)}
.gauge .rail .fill{position:absolute;top:50%;height:2px;background:var(--rule);transition:width .6s}
.gauge.weak .rail .mark{background:var(--annot)}
.gauge .val{font-family:var(--mono);text-align:right;font-size:15px}

.callouts{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:8px 0 4px}
.callout{border-left:3px solid var(--good);padding:4px 0 4px 14px}
.callout.fix{border-left-color:var(--annot)}
.callout .k{font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--graphite)}
.callout .v{font-size:16px;font-weight:640;margin-top:3px}
.obs{margin-top:14px;color:var(--ink-soft);font-style:italic}

.preview{margin-top:20px;border:1px solid var(--line);border-radius:12px;overflow:hidden;background:#fff}
.preview img{display:block;width:100%}
.preview .cap{font-family:var(--mono);font-size:11px;color:var(--graphite);padding:8px 12px;border-top:1px solid var(--line)}

.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}

/* abstain */
.abstain{background:#fff;border:1px solid var(--annot);border-radius:14px;padding:26px;margin-top:26px}
.abstain h3{color:var(--annot);margin-bottom:8px}

/* pricing */
.plans{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:30px}
.plan{background:#fff;border:1px solid var(--line);border-radius:16px;padding:24px;box-shadow:var(--shadow);
  display:flex;flex-direction:column}
.plan.featured{border:1.5px solid var(--rule)}
.plan .pname{font-weight:720;font-size:18px}
.plan .price{font-family:var(--mono);font-size:34px;font-weight:700;margin:10px 0}
.plan .price small{font-size:14px;color:var(--graphite);font-weight:500}
.plan ul{list-style:none;padding:0;margin:0 0 20px;color:var(--ink-soft);font-size:14.5px}
.plan li{padding:6px 0;border-bottom:1px dashed var(--line)}
.plan .btn{margin-top:auto;justify-content:center}

/* footer */
footer{border-top:1px solid var(--line);padding:40px 0;color:var(--graphite);font-size:13.5px}
footer .disc{max-width:70ch;margin-bottom:14px}
footer .row{display:flex;gap:22px;flex-wrap:wrap}

/* toast */
#toast{position:fixed;left:50%;bottom:26px;transform:translateX(-50%) translateY(20px);
  background:var(--ink);color:#fff;padding:12px 18px;border-radius:10px;font-size:14px;opacity:0;
  pointer-events:none;transition:.25s;z-index:50;box-shadow:var(--shadow)}
#toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

.spinner{width:18px;height:18px;border:2px solid rgba(255,255,255,.4);border-top-color:#fff;border-radius:50%;
  animation:spin .7s linear infinite;display:inline-block}
@keyframes spin{to{transform:rotate(360deg)}}

@media (max-width:820px){
  .steps,.flow,.plans{grid-template-columns:1fr}
  .callouts{grid-template-columns:1fr}
  .gauge{grid-template-columns:120px 1fr 38px}
}
:focus-visible{outline:2px solid var(--rule);outline-offset:2px}
@media (prefers-reduced-motion:reduce){.specimen .scan{animation:none;display:none}}