/* Kerf website — shared styles
   Palette and outlines match the Kerf app (cel-shaded, paper-like). */
:root {
  --paper: #E4EBDD;
  --dot: #C9D6C0;
  --panel: #F5F9F1;
  --ink: #2B3A2C;
  --text: #3B4A3C;
  --muted: #4A5747;
  --line: #D3DFCC;
  --line-strong: #AEBFA7;
  --butter: #F0E6B9;
  --butter-ink: #5C5322;
  --navy: #24384F;
  --navy-deep: #1B2B3D;
  --sky: #CBDCEA;
  --sky-line: #7E9AB4;
  --mint: #ADDCBD;
  --blush: #F2CFC7;
  --red: #8C3A2C;
  --display: "Bricolage Grotesque", "Arial Rounded MT Bold", "Trebuchet MS", sans-serif;
  --body: "Figtree", "Segoe UI", system-ui, -apple-system, sans-serif;
  --pad: clamp(20px, 7vw, 120px);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 90px; }
body {
  margin: 0;
  font-family: var(--body);
  color: var(--ink);
  background-color: var(--paper);
  background-image: radial-gradient(var(--dot) 1.2px, transparent 1.3px);
  background-size: 24px 24px;
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; }
a { color: var(--navy); }
a:hover { color: var(--ink); }
h1, h2, h3 { font-family: var(--display); margin: 0; color: var(--navy); }
p { margin: 0; }
:focus-visible { outline: 3px solid var(--navy); outline-offset: 3px; border-radius: 4px; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--butter); padding: 8px 12px; border: 2px solid var(--ink); border-radius: 8px; z-index: 50; }
.skip:focus { left: 8px; }
.wrap { padding-left: var(--pad); padding-right: var(--pad); }
.band { background: var(--panel); border-top: 2px solid var(--ink); border-bottom: 2px solid var(--ink); }
.section { padding-top: clamp(64px, 8vw, 96px); padding-bottom: clamp(64px, 8vw, 96px); }
.h-xl { font-weight: 800; font-size: clamp(56px, 8vw, 104px); line-height: 0.92; letter-spacing: -0.045em; }
.h-lg { font-weight: 800; font-size: clamp(38px, 5vw, 60px); line-height: 1; letter-spacing: -0.035em; }
.h-md { font-weight: 700; font-size: clamp(22px, 2.2vw, 26px); letter-spacing: -0.02em; color: var(--ink); }
.lead { font-size: clamp(18px, 1.6vw, 21px); color: var(--text); max-width: 30em; }
.muted { color: var(--muted); font-size: 15px; }
.head-row { display: flex; justify-content: space-between; align-items: flex-end; gap: 32px; margin-bottom: 40px; flex-wrap: wrap; }
.head-row .h-lg { max-width: 12em; }

/* ---------- buttons ---------- */
.btn {
  display: inline-block; text-decoration: none; font: inherit; font-weight: 700; font-size: 17px;
  padding: 14px 22px; border: 2px solid var(--ink); border-radius: 12px; cursor: pointer;
  box-shadow: 4px 4px 0 var(--ink); transition: transform 120ms ease, box-shadow 120ms ease;
  text-align: center; line-height: 1.2;
}
.btn:hover { transform: translate(-1px, -1px); box-shadow: 5px 5px 0 var(--ink); }
.btn:active { transform: translate(3px, 3px); box-shadow: 1px 1px 0 var(--ink); }
.btn-navy { background: var(--navy); color: var(--panel); }
.btn-navy:hover { color: var(--panel); }
.btn-light { background: var(--panel); color: var(--ink); }
.btn-sky { background: var(--sky); color: var(--navy); }
.btn-butter { background: var(--butter); color: var(--ink); }
.btn-sm { font-size: 15px; padding: 10px 16px; box-shadow: 3px 3px 0 var(--ink); border-radius: 10px; }

/* ---------- header ---------- */
.site-head {
  position: sticky; top: 0; z-index: 20; background: var(--panel); border-bottom: 2px solid var(--ink);
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding-top: 16px; padding-bottom: 16px;
}
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); }
.brand-word { font-family: var(--display); font-weight: 800; font-size: 28px; letter-spacing: -0.03em; color: var(--navy); }
.nav { display: flex; gap: 28px; font-weight: 600; }
.nav a { text-decoration: none; color: var(--ink); }
.nav a:hover { text-decoration: underline; text-underline-offset: 4px; }
.head-actions { display: flex; align-items: center; gap: 12px; }
.signin { font-weight: 600; text-decoration: none; padding: 10px 6px; }
.lang { display: flex; border: 2px solid var(--ink); border-radius: 999px; overflow: hidden; background: var(--panel); }
.lang button { border: 0; padding: 7px 13px; font: inherit; font-weight: 700; font-size: 14px; cursor: pointer; background: var(--panel); color: var(--ink); }
.lang button + button { border-left: 2px solid var(--ink); }
.lang button[aria-pressed="true"] { background: var(--sky); }

/* ---------- hero ---------- */
.hero { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 600px); gap: 64px; align-items: center; padding-top: clamp(48px, 7vw, 88px); padding-bottom: clamp(56px, 7vw, 96px); }
.hero-copy { display: flex; flex-direction: column; gap: 26px; max-width: 560px; }
.cta-row { display: flex; gap: 14px; flex-wrap: wrap; }
.sheet-card { background: var(--panel); border: 2px solid var(--ink); border-radius: 18px; box-shadow: 6px 6px 0 var(--ink); padding: 30px 28px 24px; }
.sheet-top { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; margin-bottom: 22px; flex-wrap: wrap; }
.sheet-title { font-family: var(--display); font-weight: 700; font-size: 20px; }
.sheet { position: relative; width: 100%; max-width: 480px; aspect-ratio: 2 / 1; margin: 0 auto; }
.sheet-outline { position: absolute; inset: 0; border: 2px dashed var(--line-strong); border-radius: 4px; }
.part {
  position: absolute; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px; text-align: center;
  background: #F7F3E6; background-image: repeating-linear-gradient(90deg, rgba(43,58,44,0.035) 0 2px, transparent 2px 9px);
  border: 2px solid var(--ink); border-radius: 3px;
  transition: transform 700ms cubic-bezier(.2,1.4,.4,1) 1300ms, box-shadow 700ms ease 1300ms;
}
.part b { font-family: var(--display); font-size: clamp(12px, 1.3vw, 15px); }
.part span { font-size: clamp(10px, 1.1vw, 12.5px); color: var(--text); }
.part b, .part span { opacity: 0; transition: opacity 400ms ease 1700ms; }
.kerf { position: absolute; background: var(--red); transform-origin: 0 0; }
.kerf.v { width: 3px; top: 0; height: 100%; transform: scaleY(0); }
.kerf.h { height: 3px; transform: scaleX(0); }
.blade { position: absolute; left: 0; top: 0; width: 30px; height: 30px; margin: -15px 0 0 -15px; opacity: 0; pointer-events: none; }
.sheet.is-cut .part b, .sheet.is-cut .part span { opacity: 1; }
.sheet.is-cut .part { box-shadow: 4px 4px 0 var(--ink); }
.sheet.is-cut .kerf.v { animation: sawV 380ms ease-out forwards; }
.sheet.is-cut .kerf.h { animation: sawH 380ms ease-out forwards; }
.sheet.is-cut .blade { animation: blade 1300ms ease-in-out forwards; }
@keyframes sawV { to { transform: scaleY(1); } }
@keyframes sawH { to { transform: scaleX(1); } }
@keyframes blade {
  0%   { opacity: 0; left: 25%;  top: -6%;   transform: rotate(0); }
  10%  { opacity: 1; }
  30%  { left: 25%;  top: 100%; transform: rotate(540deg); }
  33%  { left: 50%;  top: -6%;  transform: rotate(560deg); }
  60%  { left: 50%;  top: 100%; transform: rotate(1100deg); }
  63%  { left: 81.2%; top: -6%; transform: rotate(1120deg); }
  90%  { opacity: 1; left: 81.2%; top: 100%; transform: rotate(1660deg); }
  100% { opacity: 0; left: 81.2%; top: 108%; transform: rotate(1700deg); }
}
.sheet-foot { display: flex; justify-content: space-between; align-items: center; gap: 14px; margin-top: 26px; flex-wrap: wrap; }
.pills { display: flex; gap: 8px; flex-wrap: wrap; }
.pill { border: 2px solid var(--ink); border-radius: 999px; padding: 4px 12px; font-weight: 700; font-size: 14px; }
.pill.mint { background: var(--mint); } .pill.butter { background: var(--butter); } .pill.blush { background: var(--blush); } .pill.panel { background: var(--panel); }
.sheet-note { margin: 16px 4px 0; font-size: 15px; color: var(--muted); }

/* ---------- feature cards ---------- */
.grid3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.feature { border: 2px solid var(--ink); border-radius: 16px; box-shadow: 4px 4px 0 var(--ink); padding: 28px; display: flex; flex-direction: column; gap: 12px; }
.feature p { color: var(--text); }
.bg-butter { background: var(--butter); } .bg-sky { background: var(--sky); } .bg-mint { background: var(--mint); }

/* ---------- product tour ---------- */
.tour { display: grid; grid-template-columns: 330px minmax(0, 1fr); gap: 40px; align-items: start; }
.tabs { display: flex; flex-direction: column; gap: 12px; }
.tab {
  text-align: left; font: inherit; cursor: pointer; display: flex; flex-direction: column; gap: 4px; padding: 18px 20px;
  border: 2px solid var(--ink); border-radius: 14px; background: var(--panel); color: var(--ink); transition: box-shadow 150ms ease, background 150ms ease;
}
.tab b { font-family: var(--display); font-size: 21px; }
.tab span { font-size: 15.5px; color: var(--text); }
.tab[aria-selected="true"] { background: var(--sky); box-shadow: 4px 4px 0 var(--ink); }
.window { background: var(--paper); border: 2px solid var(--ink); border-radius: 16px; box-shadow: 6px 6px 0 var(--ink); overflow: hidden; }
.window-bar { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 14px 20px; background: var(--panel); border-bottom: 2px solid var(--ink); }
.logo-box { width: 34px; height: 34px; border: 2px solid var(--ink); border-radius: 8px; background: var(--butter); display: inline-flex; align-items: center; justify-content: center; font-size: 11px; font-weight: 700; }
.saved { background: #1F5730; color: #EEF6EF; border-radius: 6px; padding: 3px 9px; font-size: 13px; font-weight: 600; white-space: nowrap; }
.window-body { padding: 24px; min-height: 470px; }
.panel[hidden] { display: none; }
.stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.stat { background: var(--panel); border: 2px solid var(--ink); border-radius: 12px; padding: 14px 16px; }
.stat small { font-size: 13.5px; color: var(--muted); display: block; }
.stat strong { font-family: var(--display); font-weight: 800; font-size: clamp(24px, 3vw, 34px); }
.stat.alert { background: var(--blush); } .stat.alert small { color: #6E2A1F; } .stat.alert strong { color: var(--red); }
.list { margin-top: 18px; background: var(--panel); border: 2px solid var(--ink); border-radius: 12px; overflow: hidden; }
.list-head { background: var(--butter); border-bottom: 2px solid var(--ink); padding: 10px 16px; font-weight: 700; }
.list-row { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 10px 16px; border-bottom: 1px solid var(--line); }
.list-row:last-child { border-bottom: 0; }
.list-row.out { background: var(--blush); }
.qty { min-width: 36px; text-align: center; border: 2px solid var(--ink); border-radius: 8px; padding: 1px 8px; font-weight: 700; }
.qty.ok { background: var(--mint); } .qty.low { background: var(--butter); } .qty.zero { background: var(--blush); }
.row-note { font-size: 13.5px; color: var(--muted); margin-right: 8px; }
.cal-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
.cal { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 6px; }
.day { height: 62px; border: 2px solid var(--line-strong); border-radius: 8px; background: var(--panel); padding: 5px 6px; display: flex; flex-direction: column; gap: 4px; min-width: 0; }
.day.blank { border-color: transparent; background: transparent; }
.day b { font-size: 12.5px; }
.chip { font-size: 11px; font-weight: 700; border: 1.5px solid var(--ink); border-radius: 5px; padding: 1px 4px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.order { background: var(--panel); border: 2px solid var(--ink); border-radius: 12px; box-shadow: 3px 3px 0 var(--ink); padding: 18px; display: flex; flex-direction: column; gap: 14px; margin: 14px 0 16px; }
.order-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 10px; align-items: center; }
.order-grid.head { font-size: 14px; color: var(--muted); font-weight: 600; }
.box { border: 2px solid var(--ink); border-radius: 8px; background: #fff; padding: 3px 10px; font-weight: 700; width: 48px; text-align: center; }
.report { background: #fff; border: 2px solid var(--ink); border-radius: 10px; padding: 24px 28px; display: flex; flex-direction: column; gap: 12px; }
.report-top { display: flex; justify-content: space-between; align-items: center; gap: 12px; border-bottom: 2px solid var(--ink); padding-bottom: 14px; flex-wrap: wrap; }
.logo-dash { width: 52px; height: 52px; border: 2px dashed var(--ink); border-radius: 10px; display: inline-flex; align-items: center; justify-content: center; font-size: 11px; font-weight: 700; text-align: center; }
.rep-row { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 8px; border-bottom: 1px solid var(--line); padding-bottom: 8px; }
.rep-row span:not(:first-child) { text-align: right; }
.rep-row.head { font-size: 14px; font-weight: 700; color: var(--muted); border-bottom: 0; padding-bottom: 0; }
.rep-row.total { font-weight: 800; border-top: 2px solid var(--ink); border-bottom: 0; padding-top: 8px; }

/* ---------- steps ---------- */
.steps { position: relative; }
.steps::before { content: ""; position: absolute; left: 40px; right: 40px; top: 36px; border-top: 3px dashed var(--ink); }
.step { position: relative; display: flex; flex-direction: column; gap: 14px; }
.step-num { width: 72px; height: 72px; border: 2px solid var(--ink); border-radius: 50%; box-shadow: 3px 3px 0 var(--ink); display: flex; align-items: center; justify-content: center; font-family: var(--display); font-weight: 800; font-size: 32px; }
.step p { color: var(--text); max-width: 22em; }

/* ---------- calculator ---------- */
.calc { display: grid; grid-template-columns: minmax(0, 1fr) 440px; background: var(--panel); border: 2px solid var(--ink); border-radius: 20px; box-shadow: 6px 6px 0 var(--ink); overflow: hidden; }
.calc-in { padding: clamp(28px, 4vw, 48px); display: flex; flex-direction: column; gap: 28px; }
.slider { display: flex; flex-direction: column; gap: 8px; }
.slider-top { display: flex; justify-content: space-between; font-weight: 700; }
input[type=range] { width: 100%; height: 28px; accent-color: var(--navy); }
.calc-out { background: var(--navy); color: var(--panel); border-left: 2px solid var(--ink); padding: clamp(28px, 4vw, 48px) 40px; display: flex; flex-direction: column; justify-content: center; gap: 20px; }
.calc-out small { color: var(--sky); font-size: 17px; display: block; }
.big { font-family: var(--display); font-weight: 800; font-size: clamp(48px, 6vw, 72px); line-height: 1; letter-spacing: -0.03em; }
.calc-line { display: flex; justify-content: space-between; gap: 12px; }
.calc-line span:first-child { color: var(--sky); }
.dash { border-top: 2px dashed var(--sky-line); }
.callout { background: var(--butter); color: var(--ink); border: 2px solid var(--ink); border-radius: 12px; padding: 14px 16px; font-weight: 700; }

/* ---------- pricing ---------- */
.period { display: flex; border: 2px solid var(--ink); border-radius: 999px; background: var(--paper); padding: 4px; box-shadow: 3px 3px 0 var(--ink); }
.period button { border: 0; border-radius: 999px; padding: 10px 18px; font: inherit; font-weight: 700; font-size: 16px; cursor: pointer; background: transparent; color: var(--ink); }
.period button[aria-pressed="true"] { background: var(--sky); }
.period button.yr[aria-pressed="true"] { background: var(--butter); }
.tiers { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; align-items: stretch; }
.tier { background: var(--panel); border: 2px solid var(--ink); border-radius: 18px; box-shadow: 4px 4px 0 var(--ink); padding: 30px 26px; display: flex; flex-direction: column; gap: 16px; }
.tier.pop { background: var(--butter); box-shadow: 6px 6px 0 var(--ink); transform: translateY(-8px); }
.tier-top { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.tier-top b { font-family: var(--display); font-size: 24px; }
.price { display: flex; align-items: baseline; gap: 6px; }
.price strong { font-family: var(--display); font-weight: 800; font-size: clamp(48px, 5vw, 64px); line-height: 1; letter-spacing: -0.03em; color: var(--navy); }
.tier .btn { margin-top: auto; }
.custom { margin-top: 28px; display: flex; justify-content: space-between; align-items: center; gap: 16px; background: var(--paper); border: 2px solid var(--ink); border-radius: 14px; padding: 18px 24px; flex-wrap: wrap; }
.checks { margin: 36px 0 0; padding: 0; list-style: none; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px 24px; }
.checks li { display: flex; gap: 10px; align-items: center; }
.setup-note { margin-top: 24px; font-size: 15.5px; color: var(--text); }

/* ---------- proof ---------- */
.proof { display: flex; gap: 48px; align-items: center; background: var(--butter); border: 2px solid var(--ink); border-radius: 20px; box-shadow: 6px 6px 0 var(--ink); padding: clamp(28px, 4vw, 48px) clamp(24px, 4vw, 56px); }
.proof-photo { flex: 0 0 150px; height: 150px; border: 2px dashed var(--butter-ink); border-radius: 16px; display: flex; align-items: center; justify-content: center; text-align: center; font-weight: 700; color: var(--butter-ink); padding: 10px; }
.quote { font-family: var(--display); font-weight: 700; font-size: clamp(24px, 2.6vw, 34px); line-height: 1.2; letter-spacing: -0.02em; }
.proof cite { font-style: normal; color: var(--butter-ink); font-weight: 600; display: block; margin-top: 14px; }

/* ---------- faq ---------- */
.faq { display: grid; grid-template-columns: 360px minmax(0, 1fr); gap: 64px; align-items: start; }
.qa { background: var(--panel); border: 2px solid var(--ink); border-radius: 14px; box-shadow: 3px 3px 0 var(--ink); overflow: hidden; margin-bottom: 14px; }
.qa button { width: 100%; display: flex; justify-content: space-between; align-items: center; gap: 16px; text-align: left; font: inherit; font-weight: 700; font-size: 19px; padding: 20px 24px; border: 0; background: var(--panel); cursor: pointer; color: var(--ink); }
.qa button:hover { background: var(--butter); }
.qa .icon { flex: 0 0 32px; height: 32px; border: 2px solid var(--ink); border-radius: 8px; background: var(--sky); display: flex; align-items: center; justify-content: center; font-size: 20px; line-height: 1; }
.qa button[aria-expanded="true"] .icon { background: var(--butter); }
.qa .answer { padding: 0 24px 22px; color: var(--text); max-width: 44em; }

/* ---------- demo + footer ---------- */
.demo { background: var(--navy); color: var(--panel); border-top: 2px solid var(--ink); }
.demo-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 520px); gap: 56px; align-items: start; padding-top: clamp(64px, 8vw, 96px); padding-bottom: clamp(64px, 8vw, 96px); }
.demo h2 { color: var(--panel); font-weight: 800; font-size: clamp(44px, 6vw, 72px); line-height: 0.98; letter-spacing: -0.04em; }
.demo .lead { color: var(--sky); margin-top: 16px; }
.demo .alt { margin-top: 28px; display: flex; gap: 12px; flex-wrap: wrap; }
.demo .btn { box-shadow: 4px 4px 0 #0F1A26; }
.form { background: var(--panel); color: var(--ink); border: 2px solid var(--ink); border-radius: 18px; box-shadow: 6px 6px 0 #0F1A26; padding: 28px; display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field.full { grid-column: 1 / -1; }
.field label { font-size: 14px; font-weight: 700; }
.field input, .field select, .field textarea { font: inherit; font-size: 16px; color: var(--ink); background: #fff; border: 2px solid var(--line-strong); border-radius: 10px; padding: 10px 12px; }
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--ink); outline: none; box-shadow: 0 0 0 3px var(--sky); }
.form .btn { grid-column: 1 / -1; box-shadow: 4px 4px 0 var(--ink); }
.form-note { grid-column: 1 / -1; font-size: 13.5px; color: var(--muted); }
.hp { position: absolute; left: -9999px; }
.site-foot { background: var(--navy-deep); color: var(--sky); padding-top: 32px; padding-bottom: 32px; display: flex; justify-content: space-between; align-items: center; gap: 24px; flex-wrap: wrap; font-size: 15px; }
.site-foot a { color: var(--panel); }
.foot-links { display: flex; gap: 24px; flex-wrap: wrap; }

/* ---------- legal pages ---------- */
.legal { max-width: 780px; margin: 0 auto; padding: 56px 20px 88px; }
.legal-card { background: var(--panel); border: 2px solid var(--ink); border-radius: 18px; box-shadow: 6px 6px 0 var(--ink); padding: clamp(24px, 5vw, 56px); }
.legal h1 { font-weight: 800; font-size: clamp(36px, 5vw, 52px); letter-spacing: -0.03em; line-height: 1.05; }
.legal h2 { font-weight: 700; font-size: 22px; color: var(--ink); margin: 34px 0 10px; }
.legal p, .legal li { color: var(--text); }
.legal p + p { margin-top: 12px; }
.legal ul { padding-left: 22px; margin: 10px 0 0; }
.legal li + li { margin-top: 8px; }
.legal .updated { margin-top: 12px; color: var(--muted); }

/* ---------- responsive ---------- */
@media (max-width: 1100px) {
  .nav { display: none; }
  .hero { grid-template-columns: 1fr; }
  .hero-copy { max-width: none; }
  .tour { grid-template-columns: 1fr; }
  .tabs { flex-direction: row; overflow-x: auto; padding: 0 4px 10px; }
  .tab { flex: 0 0 240px; }
  .calc { grid-template-columns: 1fr; }
  .calc-out { border-left: 0; border-top: 2px solid var(--ink); }
  .faq { grid-template-columns: 1fr; gap: 28px; }
  .demo-grid { grid-template-columns: 1fr; }
  .checks { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 760px) {
  body { font-size: 16px; }
  .signin { font-size: 14px; padding: 8px 4px; white-space: nowrap; }
  .head-actions .btn { display: none; }
  .grid3, .tiers { grid-template-columns: 1fr; }
  .tier.pop { transform: none; }
  .steps::before { display: none; }
  .stats { grid-template-columns: 1fr 1fr 1fr; gap: 8px; }
  .stat { padding: 10px; }
  .window-body { padding: 14px; min-height: 0; }
  .day { height: 46px; padding: 3px; }
  .chip { font-size: 9px; }
  .order-grid { grid-template-columns: 1.6fr 1fr 1fr 1fr; font-size: 14px; }
  .proof { flex-direction: column; align-items: flex-start; gap: 24px; }
  .form { grid-template-columns: 1fr; padding: 20px; }
  .checks { grid-template-columns: 1fr; }
  .sheet-card { padding: 22px 16px 18px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .part, .part b, .part span, .btn, .tab { transition: none !important; }
  .sheet.is-cut .kerf.v, .sheet.is-cut .kerf.h { animation: none; transform: none; }
  .sheet.is-cut .blade { animation: none; opacity: 0; }
}