/* revlathe.com — Oct 8 2026 brand brief: Steel / Paper / Mist / Cyan, drafting language */
@font-face { font-family: "Archivo"; src: url("fonts/archivo.woff2") format("woff2-variations"); font-weight: 100 900; font-stretch: 62% 125%; font-display: swap; }
@font-face { font-family: "Instrument Sans"; src: url("fonts/instrument-sans-400.woff2") format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: "Instrument Sans"; src: url("fonts/instrument-sans-600.woff2") format("woff2"); font-weight: 600; font-display: swap; }
@font-face { font-family: "IBM Plex Mono"; src: url("fonts/plex-mono-500.woff2") format("woff2"); font-weight: 500; font-display: swap; }

:root {
  --steel: #121821;
  --paper: #E7EAED;
  --paper-2: #F2F4F6;
  --mist: #8D99AE;
  --cyan: #4FB8D0;
  --cyan-deep: #1F8FAD;
  --ink-2: #3A4350;
  --rule: #C9D0DA;

  --wordmark: "Archivo", "Arial Black", system-ui, sans-serif;
  --body: "Instrument Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --wide: 1140px;
  --gutter: clamp(16px, 4vw, 40px);
  --measure: 64ch;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body { margin: 0; background: var(--paper); color: var(--steel); font-family: var(--body); font-size: 1.0625rem; line-height: 1.6; }
img, svg { display: block; max-width: 100%; }
a { color: var(--cyan-deep); text-underline-offset: 3px; }
:focus-visible { outline: 3px solid var(--cyan-deep); outline-offset: 3px; }
.skip { position: absolute; left: -9999px; top: 8px; background: var(--steel); color: var(--paper); padding: 8px 14px; z-index: 10; }
.skip:focus { left: 8px; }
.wrap { max-width: var(--wide); margin: 0 auto; padding: 0 var(--gutter); }

/* ---------- Type ---------- */
h1, h2, h3 { font-family: var(--wordmark); font-weight: 700; letter-spacing: -0.015em; line-height: 1.08; margin: 0 0 0.5em; }
h1 { font-size: clamp(2.4rem, 5.4vw, 4.4rem); font-weight: 800; font-stretch: 112%; letter-spacing: -0.025em; line-height: 1.0; }
h2 { font-size: clamp(1.7rem, 3vw, 2.4rem); font-stretch: 106%; }
h3 { font-size: 1.25rem; font-stretch: 104%; line-height: 1.25; }
p { margin: 0 0 1.1em; max-width: var(--measure); }
.lede { font-size: clamp(1.15rem, 1.7vw, 1.3rem); line-height: 1.5; color: var(--ink-2); }
.mono { font-family: var(--mono); font-size: 0.8rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-2); }

/* ---------- Header ---------- */
.site-head { padding: 20px 0; border-bottom: 1px solid var(--rule); }
.site-head .wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px 28px; }
.brand { display: flex; align-items: center; gap: 12px; color: var(--steel); text-decoration: none; }
.brand svg { width: 38px; height: 38px; flex: none; }
.brand .word { font-family: var(--wordmark); font-weight: 800; font-stretch: 118%; font-size: 1.15rem; letter-spacing: 0.01em; line-height: 1; }
.brand .by { display: block; font-family: var(--mono); font-size: 0.62rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-2); margin-top: 4px; }
.nav { display: flex; flex-wrap: wrap; gap: 4px 22px; margin: 0; padding: 0; list-style: none; }
.nav a { color: var(--steel); text-decoration: none; font-weight: 600; font-size: 0.97rem; padding: 6px 0; border-bottom: 2px solid transparent; }
.nav a:hover { border-bottom-color: var(--steel); }
.nav a[aria-current="page"] { border-bottom-color: var(--cyan); }

/* ---------- Buttons ---------- */
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }
.btn { display: inline-block; font-weight: 600; text-decoration: none; padding: 13px 22px; border: 2px solid var(--steel); border-radius: 3px; color: var(--steel); background: transparent; line-height: 1.2; cursor: pointer; font-family: var(--body); font-size: 1rem; }
.btn:hover { background: var(--steel); color: var(--paper); }
.btn-primary { background: var(--steel); color: var(--paper); }
.btn-primary:hover { background: var(--cyan-deep); border-color: var(--cyan-deep); color: #fff; }

/* ---------- Hero ---------- */
.hero { padding: clamp(40px, 7vw, 92px) 0 clamp(40px, 6vw, 72px); }
.hero h1 { max-width: 16ch; }
.hero .tag { font-family: var(--mono); font-size: 0.82rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--cyan-deep); margin: 0 0 18px; }
.hero .lede { margin-top: 1em; }

/* ---------- Dimension line: the one drafting device ---------- */
.dim { display: flex; align-items: center; gap: 14px; margin: 0 0 14px; color: var(--ink-2); font-family: var(--mono); font-size: 0.78rem; letter-spacing: 0.1em; text-transform: uppercase; }
.dim::before, .dim::after { content: ""; flex: 1; height: 1px; background: var(--mist); position: relative; }
.dim::before { max-width: 48px; flex: none; width: 48px; }
.dim::after { flex: 1; }

/* ---------- Sections ---------- */
.section { padding: clamp(48px, 7vw, 88px) 0; border-top: 1px solid var(--rule); }
.section-head { max-width: var(--measure); margin-bottom: 32px; }

/* LATHE drawing */
.lathe { width: 100%; height: auto; margin: 8px 0 28px; }
.lathe .cl { stroke: var(--cyan); stroke-width: 2; stroke-dasharray: 22 6 3 6; }
.lathe .part { fill: var(--paper-2); stroke: var(--steel); stroke-width: 2.5; }
.lathe .dimline { stroke: var(--mist); stroke-width: 1.2; }
.lathe .tick { stroke: var(--steel); stroke-width: 2; }
.lathe text { font-family: var(--mono); fill: var(--steel); font-size: 13px; letter-spacing: 0.06em; }
.lathe text.letter { font-family: var(--wordmark); font-weight: 800; font-size: 30px; letter-spacing: 0; }
.lathe text.small { fill: var(--ink-2); font-size: 12px; }
.gates { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 0 20px; }
.gates li { border-top: 2px solid var(--steel); padding-top: 14px; }
.gates .g { font-family: var(--wordmark); font-weight: 800; font-size: 1.6rem; line-height: 1; margin-bottom: 8px; }
.gates .g span { color: var(--cyan-deep); }
.gates p { font-size: 0.95rem; margin: 0; }

/* Offers: a parts list, not cards */
.parts { border-top: 2px solid var(--steel); margin: 0; }
.part-row { display: grid; grid-template-columns: 120px minmax(0, 1.1fr) minmax(0, 1.4fr); gap: 12px 28px; padding: 22px 0; border-bottom: 1px solid var(--rule); align-items: start; }
.part-row .when { font-family: var(--mono); font-size: 0.8rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-2); padding-top: 6px; }
.part-row h3 { margin: 0 0 6px; }
.part-row p { margin: 0; font-size: 1rem; }
.part-row .out { font-size: 1rem; }
.part-row .out strong { display: block; margin-bottom: 4px; }
.note { color: var(--ink-2); font-size: 0.97rem; margin-top: 16px; }

/* Versus */
.versus { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px 40px; }
.versus li { border-left: 3px solid var(--cyan); padding-left: 16px; }
.versus b { display: block; font-family: var(--wordmark); font-weight: 700; font-stretch: 104%; margin-bottom: 4px; }
.versus p { margin: 0; font-size: 1rem; }

/* About */
.about .wrap { display: grid; grid-template-columns: minmax(200px, 300px) minmax(0, 1fr); gap: clamp(28px, 5vw, 64px); align-items: start; }
.about img { width: 100%; height: auto; border: 1px solid var(--rule); }
.about .cap { font-family: var(--mono); font-size: 0.75rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-2); margin-top: 10px; }

/* Not for */
.notfor { list-style: none; padding: 0; margin: 0; max-width: var(--measure); }
.notfor li { padding: 10px 0 10px 28px; position: relative; border-bottom: 1px solid var(--rule); }
.notfor li::before { content: ""; position: absolute; left: 0; top: 20px; width: 14px; height: 2px; background: var(--steel); }

/* The one Steel block */
.steel { background: var(--steel); color: var(--paper); padding: clamp(40px, 7vw, 88px) 0; }
.steel h2 { color: #fff; }
.steel p { color: #C9D0DA; }
.steel .btn { border-color: var(--paper); color: var(--paper); }
.steel .btn:hover { background: var(--paper); color: var(--steel); }
.steel .btn-primary { background: var(--cyan); border-color: var(--cyan); color: var(--steel); }
.steel .btn-primary:hover { background: #fff; border-color: #fff; }
.steel .dim { color: var(--mist); }
.steel .dim::before, .steel .dim::after { background: var(--mist); }

/* ---------- Check page ---------- */
.page-head { padding: clamp(36px, 6vw, 72px) 0 clamp(20px, 3vw, 32px); }
.page-head h1 { font-size: clamp(2.1rem, 4.6vw, 3.6rem); max-width: 18ch; }
.check { padding-bottom: clamp(48px, 7vw, 88px); }
.check form { max-width: 720px; }
fieldset { border: 0; padding: 0; margin: 0 0 28px; border-top: 2px solid var(--steel); padding-top: 18px; }
legend { font-family: var(--wordmark); font-weight: 700; font-size: 1.2rem; font-stretch: 104%; padding: 0; margin-bottom: 4px; float: left; width: 100%; }
legend + * { clear: both; }
.gate-num { font-family: var(--mono); font-size: 0.78rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--cyan-deep); display: block; margin-bottom: 4px; }
.hint { color: var(--ink-2); font-size: 0.97rem; margin: 0 0 12px; }
.choices { display: grid; gap: 8px; }
.choices label { display: flex; gap: 12px; align-items: flex-start; padding: 12px 14px; border: 1px solid var(--rule); background: var(--paper-2); cursor: pointer; border-radius: 3px; }
.choices label:has(input:checked) { border-color: var(--steel); box-shadow: inset 0 0 0 1px var(--steel); }
.choices input { margin-top: 4px; accent-color: var(--steel); }
input[type="text"], input[type="email"], textarea { width: 100%; font: inherit; padding: 12px 14px; border: 1px solid var(--mist); border-radius: 3px; background: #fff; color: var(--steel); }
input:focus, textarea:focus { outline: 3px solid var(--cyan-deep); outline-offset: 1px; border-color: var(--steel); }
textarea { min-height: 96px; resize: vertical; }
.field { margin-bottom: 14px; }
.field label { display: block; font-weight: 600; margin-bottom: 6px; }
.field .opt { font-weight: 400; color: var(--ink-2); }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

.result { border: 2px solid var(--steel); padding: clamp(22px, 4vw, 36px); margin: 8px 0 28px; background: var(--paper-2); }
.result[hidden] { display: none; }
.result h2 { margin-top: 0; }
.result .mono { margin-bottom: 10px; display: block; }
.result-ready { border-color: var(--cyan-deep); }
.followup { border-top: 1px solid var(--rule); margin-top: 20px; padding-top: 18px; }
.followup p { margin-bottom: 10px; }
.followup .row { display: flex; flex-wrap: wrap; gap: 10px; }
.followup input[type="email"] { flex: 1 1 260px; }
.status { font-weight: 600; margin-top: 10px; }
.status.err { color: #8a2a1c; }
.status.ok { color: var(--cyan-deep); }

.prose { padding-bottom: clamp(48px, 7vw, 88px); }
.prose h2 { margin-top: 1.6em; font-size: clamp(1.4rem, 2.4vw, 1.9rem); }
.prose ul { padding-left: 1.2em; max-width: var(--measure); }
.updated { color: var(--ink-2); font-size: 0.95rem; }

/* ---------- Footer: a title block ---------- */
.site-foot { border-top: 2px solid var(--steel); padding: 0 0 40px; font-size: 0.93rem; }
.title-block { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border-left: 1px solid var(--rule); border-right: 1px solid var(--rule); border-bottom: 1px solid var(--rule); margin-bottom: 20px; }
.title-block div { padding: 12px 14px; border-right: 1px solid var(--rule); min-width: 0; }
.title-block div:last-child { border-right: 0; }
.title-block .k { font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-2); display: block; margin-bottom: 2px; }
.title-block a { color: var(--steel); }
.site-foot .legal { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px; color: var(--ink-2); }
.site-foot .legal ul { list-style: none; margin: 0; padding: 0; display: flex; gap: 18px; }
.site-foot .legal a { color: var(--steel); }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .gates { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px 24px; }
  .part-row { grid-template-columns: 1fr; gap: 6px; }
  .part-row .when { padding-top: 0; }
  .title-block { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .title-block div:nth-child(2) { border-right: 0; }
  .title-block div:nth-child(-n+2) { border-bottom: 1px solid var(--rule); }
}
@media (max-width: 640px) {
  .versus { grid-template-columns: 1fr; }
  .about .wrap { grid-template-columns: 1fr; }
  .about figure { max-width: 260px; margin: 0; }
  .gates { grid-template-columns: 1fr; }
  .btn { width: 100%; text-align: center; }
}