/* Docuron marketing site — the approved "H" direction (paper, Barlow, ink blue).
   Every size is in rem; the root font-size grows with the viewport above 1440 px,
   so the page keeps the same proportions from a laptop to a 4K screen. */

:root {
  --ink: #1F3A93;
  --text: #1A1917;
  --muted: #5E5A52;
  --soft: #46423B;
  --rule: #D6D0C4;
  --warn: #9A4A0B;
  --paper: #F3F2EF;
  --gut: clamp(1.25rem, 5vw, 5rem);
  color-scheme: light;
}

html { font-size: clamp(16px, calc(100vw / 90), 40px); scroll-behavior: smooth; scroll-padding-top: 4.5rem; }
@media (max-width: 1440px) { html { font-size: 16px; } }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: 'Barlow', system-ui, sans-serif;
  font-variant-numeric: tabular-nums;
  color: var(--text);
  background: var(--paper) url(/assets/paper.webp) top left / 120rem auto repeat;
  -webkit-font-smoothing: antialiased;
}
::selection { background: rgba(31, 58, 147, .16); color: var(--text); }
a { color: var(--text); }
a:hover { color: var(--ink); }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }
em { font-style: italic; color: var(--ink); }
img { max-width: 100%; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: -999px; top: 0; background: var(--text); color: #fff; padding: .75rem 1rem; z-index: 20; }
.skip:focus { left: 1rem; top: 1rem; }

.paper-sheet, .sheet {
  background: linear-gradient(rgba(255,255,255,.6), rgba(255,255,255,.6)), url(/assets/paper.webp) 40% 30% / 87.5rem auto;
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; height: 3.5rem; padding: 0 1.75rem;
  border: 1px solid var(--text); font-size: .9375rem; font-weight: 600; letter-spacing: .08em;
  text-transform: uppercase; text-decoration: none; color: var(--text);
  transition: background-color .2s cubic-bezier(.2,.7,.2,1), color .2s, border-color .2s;
}
.btn:hover { background: var(--text); color: #fff; }
.btn-primary { background: var(--text); color: #fff; }
.btn-primary:hover { background: var(--ink); border-color: var(--ink); color: #fff; }
.btn-sm { height: auto; padding: .75rem 1.125rem; font-size: .875rem; }

/* ---------- header ---------- */
.top {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding: 1.375rem var(--gut);
  background: rgba(243, 242, 239, .9); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--text);
}
.top-logo img { height: 2rem; width: auto; display: block; transition: height .3s ease-in-out; }
.top { transition: padding .3s ease-in-out; }
.top .btn-sm { transition: padding .3s ease-in-out; }
.top.compact { padding-top: .625rem; padding-bottom: .625rem; }
.top.compact .top-logo img { height: 1.5rem; }
.top.compact .btn-sm { padding-top: .5rem; padding-bottom: .5rem; }
.top-nav { display: flex; align-items: center; gap: 2.25rem; font-size: .875rem; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; }
.top-nav > a:not(.btn) { text-decoration: none; }
.lang { position: relative; }
.lang summary { list-style: none; cursor: pointer; display: flex; align-items: center; gap: .4rem; padding: .5rem .25rem; }
.lang summary::-webkit-details-marker { display: none; }
.lang summary svg { width: 1rem; height: 1rem; }
.lang ul { position: absolute; right: 0; top: 100%; margin: .5rem 0 0; padding: .375rem; list-style: none; background: #fff; border: 1px solid var(--rule); box-shadow: 0 .5rem 1.25rem -.625rem rgba(40,32,20,.4); min-width: 9rem; }
.lang li a { display: block; padding: .5rem .75rem; text-decoration: none; text-transform: none; letter-spacing: 0; font-weight: 500; }
.lang li a[aria-current="true"] { color: var(--ink); font-weight: 600; }
.lang li a:hover { background: rgba(31,58,147,.07); }

/* ---------- hero ---------- */
.hero { display: grid; grid-template-columns: minmax(0, 45rem) minmax(0, 1fr); gap: 2rem; padding: 0 var(--gut); min-height: 51.25rem; }
.hero-copy { padding-top: 5.5rem; min-width: 0; }
.hero h1 { margin: 0; font-weight: 600; font-size: 6rem; line-height: .95; letter-spacing: -.015em; text-transform: uppercase; }
.h1-line { display: block; }
.h1-word { display: flex; align-items: center; height: 6.25rem; }
.word { display: inline-block; font-style: italic; color: var(--ink); white-space: nowrap; font-size: 6rem; }
.word, .hero-sheet > * { transition: opacity .45s ease-in-out, transform .45s ease-in-out; }
.word.out, .hero-sheet.out > * { opacity: 0; transform: translateY(.375rem); }
.kicker { margin: 0 0 1.5rem; max-width: 40rem; font-size: .875rem; font-weight: 600; letter-spacing: .08em; line-height: 1.5; text-transform: uppercase; color: var(--muted); }
.lead { margin: 1.75rem 0 0; max-width: 33.75rem; font-size: 1.25rem; line-height: 1.5; color: var(--soft); }
.hero-cta { margin-top: 2.5rem; display: flex; gap: .75rem; flex-wrap: wrap; }
.hero-visual { position: relative; min-width: 0; }
.hero-sheet {
  position: absolute; left: 1.25rem; top: 4rem; width: 33.75rem; height: 41.25rem; padding: 2.5rem 2.75rem;
  display: flex; flex-direction: column; gap: 1.375rem;
  box-shadow: 0 1px 2px rgba(40,32,20,.06), 0 2.25rem 4rem -2.5rem rgba(40,32,20,.55); transform: rotate(.8deg);
}
.hs-meta { display: flex; gap: 1.5rem; font-size: .75rem; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
.hs-title { font-weight: 600; font-size: 2.875rem; line-height: .95; text-transform: uppercase; max-width: 25rem; }
.hs-rule { height: 1px; background: var(--text); }
.hs-fields { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.125rem 1.75rem; }
.hs-field { display: flex; flex-direction: column; gap: .25rem; border-top: 1px solid var(--rule); padding-top: .5rem; }
.hs-label { font-size: .75rem; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
.hs-value { font-size: 1.1875rem; font-weight: 500; color: var(--ink); }
.hs-foot { margin-top: auto; display: flex; justify-content: space-between; align-items: flex-end; }
.hs-big { font-weight: 500; font-size: 10.5rem; line-height: .78; letter-spacing: -.04em; }
.icon-btn { position: absolute; right: 0; bottom: 2.5rem; width: 2.75rem; height: 2.75rem; border-radius: 50%; border: 1px solid var(--text); background: transparent; color: var(--text); display: flex; align-items: center; justify-content: center; cursor: pointer; }
.icon-btn:hover { background: var(--text); color: #fff; }
.icon-btn svg { width: .875rem; height: .875rem; }
.icon-btn .i-play { display: none; }
.icon-btn.paused .i-play { display: block; }
.icon-btn.paused .i-pause { display: none; }

/* ---------- demo (sticky stage + steps) ---------- */
.demo { margin: 6rem var(--gut) 0; border-top: 1px solid var(--text); display: grid; grid-template-columns: minmax(0, 56.25rem) minmax(18rem, 1fr); gap: 3rem; }
.demo-sticky { position: sticky; top: 3.75rem; padding-top: 1.75rem; }
.tabs { display: flex; gap: 1.375rem; margin-bottom: .875rem; flex-wrap: wrap; }
.tabs button { background: none; border: none; padding: 0 0 .375rem; font: 600 .75rem 'Barlow', sans-serif; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); cursor: pointer; border-bottom: 2px solid transparent; }
.tabs button[aria-pressed="true"] { color: var(--text); border-bottom-color: var(--ink); padding-bottom: .25rem; }
.stage-frame { position: relative; width: 100%; overflow: hidden; }
.stage { position: absolute; left: 0; top: 0; width: 900px; height: 720px; transform-origin: 0 0; }
.form { position: absolute; left: 0; top: 0; width: 340px; height: 720px; overflow: hidden; box-shadow: 0 1px 2px rgba(40,32,20,.06), 0 30px 60px -40px rgba(40,32,20,.5); font-size: 16px; }
.doc { position: absolute; left: 380px; top: 0; width: 520px; height: 720px; background: #fff; box-shadow: 0 1px 2px rgba(40,32,20,.08), 0 30px 60px -40px rgba(40,32,20,.5); font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif; color: #222; }
.links { position: absolute; left: 0; top: 0; pointer-events: none; overflow: visible; }
.f-group { position: absolute; left: 0; right: 0; height: 30px; display: flex; align-items: center; padding: 0 16px; background: rgba(26,25,23,.06); font-size: 12px; font-weight: 600; letter-spacing: .12em; text-transform: uppercase; }
.f-field { position: absolute; left: 8px; right: 8px; height: 38px; display: grid; grid-template-columns: 104px 1fr 16px; align-items: center; gap: 8px; padding: 0 8px; border: 1.5px solid transparent; box-shadow: inset 0 -1px 0 #E2DDD3; background: transparent; font: inherit; color: var(--text); text-align: left; cursor: pointer; transition: background-color .35s cubic-bezier(.16,1,.3,1), border-color .35s cubic-bezier(.16,1,.3,1); }
.f-field:hover { border-color: rgba(31,58,147,.45); }
.f-field[aria-pressed="true"] { border-color: var(--ink); background: rgba(31,58,147,.08); box-shadow: none; }
.f-label { font-size: 11px; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
.f-value { font-size: 15px; font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.f-check { display: flex; justify-content: center; color: var(--ink); }
.f-panel { position: absolute; left: 8px; right: 8px; display: flex; align-items: flex-start; gap: 10px; padding: 9px 8px; font-size: 13px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; }
.f-panel .sub { display: block; margin-top: 4px; font-size: 13px; font-weight: 400; letter-spacing: 0; text-transform: none; line-height: 1.45; color: var(--soft); }
.d-txt { position: absolute; white-space: nowrap; line-height: 1.3; }
.d-val { position: absolute; white-space: nowrap; line-height: 1.3; padding: 1px 4px; margin: -2.5px -5.5px; border: 1.5px solid transparent; background: transparent; font-family: inherit; color: inherit; cursor: pointer; text-align: left; transition: background-color .35s, border-color .35s; }
.d-val.on { border-color: #3B5BDB; background: rgba(59,91,219,.12); }
.d-rule { position: absolute; height: 1px; }
.d-rect { position: absolute; background: rgba(59,91,219,.09); }
.d-stamp { position: absolute; left: 250px; top: 548px; display: inline-flex; align-items: center; gap: 8px; padding: 6px 10px; border: 1.5px solid var(--ink); color: var(--ink); font: 700 12px 'Barlow', sans-serif; letter-spacing: .1em; text-transform: uppercase; transform: rotate(-4deg); }
.d-stamp.in { animation: dcStamp .45s cubic-bezier(.16,1,.3,1) both; }
.d-dup { position: absolute; left: 20px; top: 592px; width: 480px; padding: 10px 14px; border: 1.5px solid var(--warn); background: #FFF8F0; display: flex; flex-direction: column; gap: 4px; font-family: 'Barlow', sans-serif; }
.d-dup b { font-size: 13px; letter-spacing: .08em; text-transform: uppercase; color: var(--warn); }
.d-dup span { font-size: 13px; color: var(--soft); }
.d-tip { position: absolute; display: flex; flex-direction: column; gap: 2px; padding: 8px 12px; background: #fff; border: 1px solid var(--rule); box-shadow: 0 8px 20px -10px rgba(40,32,20,.4); font-family: 'Barlow', sans-serif; pointer-events: none; }
.d-tip b { font-size: 11px; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
.d-tip span { font-size: 18px; font-weight: 600; color: var(--text); }
.stage .in { animation: dcIn .55s cubic-bezier(.16,1,.3,1) both; }

.demo-steps { min-width: 0; }
.step { min-height: 51.25rem; display: flex; flex-direction: column; justify-content: center; gap: 1.25rem; }
.step h2 { margin: 0; font-weight: 600; font-size: 2.75rem; line-height: .98; letter-spacing: -.01em; text-transform: uppercase; }
.step p { margin: 0; font-size: 1.125rem; line-height: 1.55; color: var(--soft); }
.hint { display: inline-flex; align-items: center; gap: .75rem; font-size: .8125rem; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; color: var(--ink); }
/* Points at the data sheet (left on wide screens, above it when stacked) and nudges towards it slowly. */
.hint-arrow { width: 2.5rem; height: auto; flex: none; animation: dcNudge 2.4s ease-in-out infinite; }
@keyframes dcNudge { 0%, 100% { transform: translateX(0); opacity: 1; } 50% { transform: translateX(-.5rem); opacity: .45; } }
@media (max-width: 1100px) { .hint-arrow { animation-name: dcNudgeUp; transform: rotate(90deg); } }
@keyframes dcNudgeUp { 0%, 100% { transform: rotate(90deg) translateX(0); opacity: 1; } 50% { transform: rotate(90deg) translateX(-.5rem); opacity: .45; } }

/* ---------- in / out ---------- */
.io { margin: 7.5rem var(--gut) 0; display: flex; flex-direction: column; gap: 2.25rem; }
.io-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 3rem; border-top: 1px solid var(--text); padding-top: 2.5rem; }
.io-head h2 { margin: 0; font-weight: 600; font-size: 3.5rem; line-height: .95; letter-spacing: -.01em; text-transform: uppercase; }
.io-head p { margin: 0; max-width: 28.75rem; font-size: 1.125rem; line-height: 1.5; color: var(--soft); }
.io-cols { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 4.5rem; }
.io-col { display: flex; flex-direction: column; }
.io-big { font-weight: 600; font-size: 7.5rem; line-height: .8; letter-spacing: -.03em; padding-bottom: 1.375rem; text-transform: uppercase; }
.io-row { display: flex; justify-content: space-between; align-items: baseline; gap: 1.5rem; padding: 1rem 0; border-top: 1px solid var(--rule); }
.io-row:first-of-type { border-top-color: var(--text); }
.io-out .io-row:first-of-type { border-top-color: var(--ink); }
.io-row:last-child { border-bottom: 1px solid var(--rule); }
.io-row strong { font-size: 1.3125rem; font-weight: 600; letter-spacing: .03em; text-transform: uppercase; }
.io-row span { font-size: 1rem; color: var(--muted); text-align: right; }

/* ---------- differentiator / results bands ---------- */
.band { margin: 7rem var(--gut) 0; }
.band h2 { margin: 0 0 2rem; font-weight: 600; font-size: 2.25rem; line-height: 1.05; letter-spacing: -.01em; text-transform: uppercase; }
.band-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); row-gap: 2rem; border-top: 1px solid var(--text); }
.band-item { padding: 1.375rem 1.75rem 0; border-left: 1px solid var(--rule); display: flex; flex-direction: column; gap: .625rem; }
.band-item:first-child { padding-left: 0; border-left: none; }
.band-item strong { font-size: 1.125rem; font-weight: 600; letter-spacing: .04em; text-transform: uppercase; }
.band-item span { font-size: 1rem; line-height: 1.5; color: var(--soft); }

/* ---------- trust + closing ---------- */
.trust { margin: 8.75rem var(--gut) 0; display: flex; flex-direction: column; gap: 3.5rem; }
.trust-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); row-gap: 2.5rem; border-top: 1px solid var(--text); }
.trust-item { padding: 1.375rem 1.75rem 0; border-left: 1px solid var(--rule); display: flex; flex-direction: column; gap: .625rem; }
.trust-item:nth-child(3n+1) { padding-left: 0; border-left: none; }
.trust-item strong { font-size: 1.125rem; font-weight: 600; letter-spacing: .04em; text-transform: uppercase; }
.trust-item span { font-size: 1rem; line-height: 1.5; color: var(--soft); }
.closing { display: flex; justify-content: space-between; align-items: flex-end; gap: 3rem; }
.closing-body { margin: 1.25rem 0 0; max-width: 36rem; font-size: 1.125rem; line-height: 1.5; color: var(--soft); }
.closing h2 { margin: 0; font-weight: 600; font-size: 4.5rem; line-height: .95; letter-spacing: -.015em; text-transform: uppercase; }

/* ---------- footer ---------- */
.foot { margin: 7.5rem var(--gut) 0; padding: 2rem 0 3rem; border-top: 1px solid var(--text); display: flex; justify-content: space-between; align-items: flex-end; gap: 3rem; }
.foot-logo { width: 40%; height: auto; display: block; }
.foot-links { display: flex; flex-direction: column; align-items: flex-end; gap: .75rem; font-size: .8125rem; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
.foot-links a { color: var(--muted); text-decoration: none; }

@keyframes dcIn { from { opacity: 0; transform: translateY(8px); filter: blur(3px); } to { opacity: 1; transform: none; filter: none; } }
@keyframes dcStamp { from { opacity: 0; transform: scale(1.25) rotate(-6deg); } to { opacity: 1; transform: scale(1) rotate(-4deg); } }
@media (prefers-reduced-motion: reduce) { .in, .d-stamp, .hint-arrow { animation: none !important; } .word, .hero-sheet > *, .top, .top * { transition: none !important; } }

/* ---------- narrower screens ---------- */
@media (max-width: 1100px) {
  .hero { grid-template-columns: 1fr; min-height: 0; }
  .hero-copy { padding-top: 3.5rem; }
  .hero-visual { height: 44rem; }
  .demo { grid-template-columns: 1fr; }
  .demo-sticky { position: static; }
  .step { min-height: 0; padding: 2.5rem 0 0; }
  .trust-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); row-gap: 1.5rem; }
  .band-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .band-item:nth-child(odd) { padding-left: 0; border-left: none; }
  .trust-item:nth-child(3n+1) { padding-left: 1.75rem; border-left: 1px solid var(--rule); }
  .trust-item:nth-child(odd) { padding-left: 0; border-left: none; }
}
@media (max-width: 760px) {
  .top-nav > a:not(.btn) { display: none; }
  .top-nav { gap: 1rem; }
  .top-nav .btn-sm { white-space: nowrap; padding-left: .75rem; padding-right: .75rem; }
  .tabs { gap: .875rem 1rem; }
  .tabs button { letter-spacing: .06em; }
  .hero h1, .word { font-size: 3.25rem; }
  .h1-word { height: 3.75rem; }
  .hero-visual { height: 2.75rem; margin-top: -1rem; }
  .hero-sheet { display: none; }
  .icon-btn { left: 0; right: auto; bottom: auto; top: 0; }
  .hero-cta .btn { flex: 1 1 auto; justify-content: center; }
  .step h2 { font-size: 2rem; }
  .io-head, .closing { flex-direction: column; align-items: flex-start; gap: 1.5rem; }
  .io-head h2 { font-size: 2.5rem; }
  .io-cols { grid-template-columns: 1fr; gap: 3rem; }
  .io-big { font-size: 4.5rem; }
  .io-row { flex-direction: column; gap: .25rem; }
  .io-row span { text-align: left; }
  .trust-grid, .band-grid { grid-template-columns: 1fr; }
  .band-item { padding-left: 0; border-left: none; }
  .band h2 { font-size: 1.75rem; }
  .trust-item { padding-left: 0; border-left: none; }
  .closing h2 { font-size: 2.75rem; }
  .foot { flex-direction: column; align-items: flex-start; }
  .foot-logo { width: 70%; }
  .foot-links { align-items: flex-start; }
}