/* ROTATECH site styles. Hand-written, no build step.
   Palette: ink + warm paper + steel; one signal orange used sparingly.
   Fonts are self-hosted (OFL): Archivo, IBM Plex Mono. */

@font-face {
  font-family: "Archivo";
  src: url("/assets/fonts/archivo-var.woff2") format("woff2");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Mono";
  src: url("/assets/fonts/plexmono-400.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "IBM Plex Mono";
  src: url("/assets/fonts/plexmono-500.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

:root {
  --ink: #0f1216;
  --ink-2: #1a2026;
  --paper: #f4f1ea;
  --paper-2: #e9e5db;
  --white: #fbfaf7;
  --steel: #56626c;
  --steel-light: #aeb6bc;
  --line: rgba(15, 18, 22, 0.85);
  --line-soft: rgba(15, 18, 22, 0.18);
  --line-dark: rgba(244, 241, 234, 0.22);
  --signal: #ff6b1a;
  --font-sans: "Archivo", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --gutter: clamp(20px, 4vw, 48px);
  --maxw: 1240px;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 84px; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-underline-offset: 3px; }
h1, h2, h3, h4 { margin: 0; font-weight: 800; letter-spacing: -0.025em; line-height: 1.05; }
p { margin: 0 0 1em; }
ul, ol { margin: 0; padding: 0; }
:focus-visible { outline: 3px solid var(--signal); outline-offset: 3px; }

.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 var(--gutter); }
.skip-link {
  position: absolute; left: 12px; top: -60px; z-index: 100;
  background: var(--ink); color: var(--paper); padding: 10px 16px; text-decoration: none;
}
.skip-link:focus { top: 12px; }

.label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin: 0;
}
.label-steel { color: var(--steel); }
.dot::before {
  content: ""; display: inline-block; width: 8px; height: 8px;
  background: var(--signal); margin-right: 10px; vertical-align: 0.05em;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(244, 241, 234, 0.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.header-row { display: flex; align-items: center; justify-content: space-between; min-height: 68px; gap: 16px; }
.wordmark {
  font-weight: 900; font-size: 1.35rem; letter-spacing: 0.14em;
  text-decoration: none; color: var(--ink);
}
.wordmark-light { color: var(--paper); }
.site-nav { display: flex; align-items: center; gap: 28px; }
.site-nav ul { display: flex; gap: 28px; list-style: none; }
.site-nav a:not(.btn) {
  text-decoration: none; font-size: 0.9375rem; font-weight: 500;
  padding: 6px 0; border-bottom: 2px solid transparent;
}
.site-nav a:not(.btn):hover, .site-nav a[aria-current="page"] { border-bottom-color: var(--ink); }
.nav-toggle {
  display: none; font: inherit; font-family: var(--font-mono); font-size: 0.8125rem;
  text-transform: uppercase; letter-spacing: 0.08em;
  background: none; border: 1px solid var(--ink); color: var(--ink);
  padding: 8px 14px; cursor: pointer;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  font: inherit; font-weight: 700; font-size: 1rem; line-height: 1;
  padding: 16px 26px; border: 1px solid var(--ink); border-radius: 0;
  text-decoration: none; cursor: pointer;
  transition: background-color 0.2s, color 0.2s, transform 0.2s;
}
.btn-primary { background: var(--signal); color: var(--ink); }
.btn-primary:hover { background: var(--ink); color: var(--paper); }
.btn-ghost { background: transparent; color: var(--ink); }
.btn-ghost:hover { background: var(--ink); color: var(--paper); }
.btn-sm { padding: 11px 18px; font-size: 0.9375rem; }
.on-dark .btn-ghost { color: var(--paper); border-color: var(--paper); }
.on-dark .btn-ghost:hover { background: var(--paper); color: var(--ink); }
.on-dark .btn-primary { border-color: var(--signal); }
.on-dark .btn-primary:hover { background: var(--paper); border-color: var(--paper); color: var(--ink); }

/* ---------- Sections ---------- */
.section { padding: clamp(64px, 9vw, 128px) 0; }
.section-head {
  display: grid; grid-template-columns: repeat(12, 1fr); gap: 24px;
  border-top: 1px solid var(--line); padding-top: 18px; margin-bottom: clamp(36px, 5vw, 72px);
}
.section-head .label { grid-column: 1 / span 12; }
.section-head h2 { grid-column: 1 / span 12; font-size: clamp(2rem, 4.6vw, 3.5rem); max-width: 18ch; margin-top: 18px; }
.section-head p { grid-column: 1 / span 12; max-width: 56ch; color: var(--steel); margin: 14px 0 0; }
.on-dark { background: var(--ink); color: var(--paper); }
.on-dark .section-head { border-top-color: var(--line-dark); }
.on-dark .section-head p { color: var(--steel-light); }
.on-dark .label-steel { color: var(--steel-light); }
@media (min-width: 900px) {
  .section-head .label { grid-column: 1 / span 3; }
  .section-head h2 { grid-column: 4 / span 9; margin-top: 0; }
  .section-head p { grid-column: 4 / span 7; }
}

/* ---------- Hero ---------- */
.hero { padding: clamp(36px, 6vw, 80px) 0 clamp(48px, 7vw, 96px); }
.hero-grid { display: grid; gap: 40px; grid-template-columns: 1fr; align-items: end; }
.hero h1 { font-size: clamp(2.5rem, 6.4vw, 4.9rem); font-weight: 900; letter-spacing: -0.04em; line-height: 0.96; margin: 22px 0 28px; }
.hero-lede { font-size: clamp(1.0625rem, 1.6vw, 1.25rem); max-width: 52ch; color: #2a323a; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.hero-figure { margin: 0; position: relative; }
.hero-figure img {
  width: 100%; aspect-ratio: 4 / 5; object-fit: cover; object-position: 88% 40%;
  background: var(--paper-2);
}
.hero-figure figcaption { margin-top: 10px; display: flex; justify-content: space-between; gap: 12px; }
.hero-facts {
  display: grid; grid-template-columns: 1fr; margin-top: clamp(40px, 6vw, 80px);
  border-top: 1px solid var(--line);
}
.hero-facts div { padding: 18px 0; border-bottom: 1px solid var(--line-soft); }
.hero-facts dt { font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--steel); margin-bottom: 6px; }
.hero-facts dd { margin: 0; font-weight: 700; font-size: 1.125rem; letter-spacing: -0.01em; }
.hero-facts { }
@media (min-width: 900px) {
  .hero-grid { grid-template-columns: repeat(12, 1fr); gap: 32px; }
  .hero-copy { grid-column: 1 / span 7; padding-bottom: 8px; }
  .hero-figure { grid-column: 8 / span 5; }
  .hero-facts { grid-template-columns: repeat(4, 1fr); column-gap: 24px; }
  .hero-facts div { border-bottom: 0; border-right: 0; }
}

/* ---------- Trades ---------- */
.trades { display: grid; gap: 28px; grid-template-columns: 1fr; list-style: none; }
.trade { border-top: 1px solid var(--line); padding-top: 14px; }
.trade img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; margin: 14px 0; background: var(--paper-2); }
.trade h3 { font-size: 1.375rem; letter-spacing: -0.02em; }
.trade p { color: var(--steel); font-size: 0.9375rem; margin: 8px 0 0; }
.trade-more { margin-top: 36px; color: var(--steel); max-width: 70ch; }
@media (min-width: 640px) { .trades { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1000px) { .trades { grid-template-columns: repeat(4, 1fr); gap: 24px; } }

/* ---------- Features ---------- */
.features-grid { display: grid; gap: 48px; grid-template-columns: 1fr; }
.feature-list { list-style: none; display: grid; grid-template-columns: 1fr; border-top: 1px solid var(--line-dark); }
.feature { padding: 22px 0; border-bottom: 1px solid var(--line-dark); display: grid; grid-template-columns: 56px 1fr; gap: 8px; }
.feature .label { color: var(--steel-light); padding-top: 6px; }
.feature h3 { font-size: 1.25rem; margin-bottom: 6px; letter-spacing: -0.015em; }
.feature p { margin: 0; color: var(--steel-light); font-size: 0.9688rem; }
.feature-media { display: grid; gap: 16px; align-content: start; }
.feature-media figure { margin: 0; }
.feature-media img { width: 100%; aspect-ratio: 3 / 2; object-fit: cover; }
.feature-media figcaption { margin-top: 8px; color: var(--steel-light); }
@media (min-width: 640px) { .feature-list { grid-template-columns: repeat(2, 1fr); column-gap: 32px; } }
@media (min-width: 1000px) {
  .features-grid { grid-template-columns: repeat(12, 1fr); gap: 32px; }
  .feature-media { grid-column: 1 / span 5; position: sticky; top: 100px; }
  .feature-list { grid-column: 6 / span 7; grid-template-columns: 1fr; }
}

/* ---------- How it works ---------- */
.steps { list-style: none; display: grid; gap: 0; grid-template-columns: 1fr; counter-reset: step; }
.step { border-top: 1px solid var(--line); padding: 20px 0 36px; }
.step-num { font-weight: 900; font-size: clamp(3.5rem, 8vw, 6rem); letter-spacing: -0.05em; line-height: 0.9; color: var(--ink); display: block; margin-bottom: 20px; }
.step h3 { font-size: 1.5rem; margin-bottom: 10px; letter-spacing: -0.02em; }
.step p { color: #2a323a; max-width: 38ch; margin: 0; }
@media (min-width: 800px) {
  .steps { grid-template-columns: repeat(3, 1fr); column-gap: 32px; }
}

/* ---------- Pricing ---------- */
.pricing { background: var(--paper-2); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.plan-group + .plan-group { margin-top: clamp(40px, 6vw, 72px); }
.plan-group-head { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin-bottom: 16px; }
.plan-group-head h3 { font-size: 1.5rem; letter-spacing: -0.02em; }
.plans { display: grid; gap: 16px; grid-template-columns: 1fr; list-style: none; }
.plan { background: var(--white); border: 1px solid var(--ink); padding: 28px 26px 30px; display: flex; flex-direction: column; }
.plan-dark { background: var(--ink); color: var(--paper); }
.plan h4 { font-size: 1.375rem; letter-spacing: -0.02em; }
.plan-for { color: var(--steel); font-size: 0.9375rem; margin: 6px 0 22px; min-height: 2.9em; }
.plan-dark .plan-for { color: var(--steel-light); }
.price { display: flex; align-items: baseline; gap: 8px; margin: 0; }
.price strong { font-size: clamp(2.6rem, 5vw, 3.5rem); font-weight: 900; letter-spacing: -0.045em; line-height: 1; }
.price span { font-family: var(--font-mono); font-size: 0.875rem; color: var(--steel); }
.plan-dark .price span { color: var(--steel-light); }
.price-note { font-family: var(--font-mono); font-size: 0.75rem; color: var(--steel); margin: 8px 0 22px; min-height: 1.5em; }
.plan-dark .price-note { color: var(--steel-light); }
.plan ul { list-style: none; border-top: 1px solid var(--line-soft); margin-bottom: 28px; flex: 1; }
.plan-dark ul { border-top-color: var(--line-dark); }
.plan li { padding: 10px 0 10px 22px; border-bottom: 1px solid var(--line-soft); font-size: 0.9688rem; position: relative; }
.plan-dark li { border-bottom-color: var(--line-dark); }
.plan li::before { content: ""; position: absolute; left: 0; top: 1.05em; width: 9px; height: 2px; background: var(--ink); }
.plan-dark li::before { background: var(--paper); }
.plan .btn { width: 100%; }
.plan-dark .btn-primary:hover { background: var(--paper); border-color: var(--paper); }
.pricing-notes { margin-top: clamp(36px, 5vw, 56px); border-top: 1px solid var(--line); padding-top: 20px; display: grid; gap: 10px; font-size: 0.9375rem; color: #2a323a; max-width: 80ch; }
.pricing-notes p { margin: 0; }
@media (min-width: 700px) { .plans { grid-template-columns: repeat(2, 1fr); } }

/* ---------- FAQ ---------- */
.faq-list { border-top: 1px solid var(--line); max-width: 860px; margin-left: auto; }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary {
  list-style: none; cursor: pointer; padding: 22px 48px 22px 0; position: relative;
  font-weight: 700; font-size: 1.1875rem; letter-spacing: -0.015em; line-height: 1.3;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after {
  content: "+"; position: absolute; right: 4px; top: 50%; transform: translateY(-50%);
  font-family: var(--font-mono); font-size: 1.5rem; font-weight: 400;
}
.faq-list details[open] summary::after { content: "\2212"; }
.faq-list .answer { padding: 0 48px 24px 0; color: #2a323a; max-width: 68ch; }
.faq-list .answer p:last-child { margin-bottom: 0; }

/* ---------- CTA ---------- */
.cta-grid { display: grid; gap: 28px; grid-template-columns: 1fr; align-items: end; }
.cta-grid h2 { font-size: clamp(2.2rem, 5vw, 4rem); max-width: 16ch; letter-spacing: -0.035em; }
.cta-grid p { color: var(--steel-light); max-width: 46ch; margin: 18px 0 0; }
.cta-actions { display: flex; flex-wrap: wrap; gap: 12px; }
@media (min-width: 900px) { .cta-grid { grid-template-columns: 8fr 4fr; } .cta-actions { justify-content: flex-end; } }

/* ---------- Page (about / legal) ---------- */
.page-head { padding: clamp(48px, 7vw, 96px) 0 clamp(28px, 4vw, 48px); border-bottom: 1px solid var(--line); }
.page-head h1 { font-size: clamp(2.4rem, 6vw, 4.5rem); font-weight: 900; letter-spacing: -0.04em; margin-top: 18px; }
.page-head .meta { margin-top: 18px; color: var(--steel); }
.page-head .lede { font-size: 1.25rem; max-width: 56ch; margin: 22px 0 0; color: #2a323a; }
.page-body { padding-top: clamp(36px, 5vw, 72px); padding-bottom: clamp(64px, 8vw, 112px); display: grid; gap: 40px; grid-template-columns: minmax(0, 1fr); }
.page-body > * { min-width: 0; }
.toc { font-size: 0.9375rem; }
.toc ol { list-style: none; border-top: 1px solid var(--line-soft); margin-top: 12px; }
.toc li { border-bottom: 1px solid var(--line-soft); }
.toc a { display: block; padding: 8px 0; text-decoration: none; color: var(--steel); }
.toc a:hover { color: var(--ink); }
.prose { max-width: 70ch; }
.prose h2 { font-size: 1.5rem; letter-spacing: -0.02em; margin: 2.2em 0 0.6em; padding-top: 1.2em; border-top: 1px solid var(--line-soft); scroll-margin-top: 90px; }
.prose h2:first-child { margin-top: 0; border-top: 0; padding-top: 0; }
.prose h3 { font-size: 1.125rem; letter-spacing: -0.01em; margin: 1.6em 0 0.4em; }
.prose p, .prose li { color: #20272e; }
.prose ul, .prose ol { padding-left: 1.3em; margin: 0 0 1em; }
.prose li { margin-bottom: 0.4em; }
.prose a { text-decoration-thickness: 1px; }
.callout { border: 1px solid var(--ink); background: var(--white); padding: 18px 22px; margin: 0 0 1.6em; }
.callout p:last-child { margin-bottom: 0; }
.table-wrap { overflow-x: auto; margin: 0 0 1.4em; }
.prose table { border-collapse: collapse; width: 100%; font-size: 0.9688rem; }
.prose th, .prose td { text-align: left; vertical-align: top; padding: 12px 14px 12px 0; border-bottom: 1px solid var(--line-soft); }
.prose th { font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.06em; text-transform: uppercase; font-weight: 500; border-bottom: 1px solid var(--ink); }
.about-figure { margin: 0 0 2em; }
.about-figure img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
.about-figure figcaption { margin-top: 8px; }
@media (min-width: 960px) {
  .page-body { grid-template-columns: 3fr 9fr; gap: 56px; }
  .toc { position: sticky; top: 100px; align-self: start; }
}

/* ---------- Footer ---------- */
.site-footer { background: var(--ink); color: var(--paper); padding: clamp(48px, 6vw, 80px) 0 32px; }
.footer-grid { display: grid; gap: 36px; grid-template-columns: 1fr; border-bottom: 1px solid var(--line-dark); padding-bottom: 40px; }
.footer-brand p { color: var(--steel-light); max-width: 34ch; margin: 14px 0 0; font-size: 0.9688rem; }
.footer-col h2 { color: var(--steel-light); margin-bottom: 14px; }
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 8px; font-size: 0.9688rem; color: var(--paper); }
.footer-col a { text-decoration: none; border-bottom: 1px solid var(--line-dark); }
.footer-col a:hover { border-bottom-color: var(--signal); }
.footer-base { padding-top: 24px; display: grid; gap: 10px; color: var(--steel-light); font-size: 0.8125rem; }
.footer-base p { margin: 0; max-width: 90ch; }
@media (min-width: 800px) { .footer-grid { grid-template-columns: 1.6fr 1fr 1fr 1.4fr; } }

/* ---------- Mobile nav ---------- */
@media (max-width: 860px) {
  .nav-toggle { display: inline-block; }
  .site-nav { display: flex; }
  .js .site-nav {
    display: none; position: absolute; left: 0; right: 0; top: 100%;
    background: var(--paper); border-bottom: 1px solid var(--line);
    flex-direction: column; align-items: stretch; gap: 0; padding: 8px var(--gutter) 20px;
  }
  .js .site-nav.is-open { display: flex; }
  .js .site-nav ul { flex-direction: column; gap: 0; }
  .js .site-nav li { border-bottom: 1px solid var(--line-soft); }
  .js .site-nav a:not(.btn) { display: block; padding: 14px 0; border-bottom: 0; }
  .js .site-nav .btn { margin-top: 16px; }
  html:not(.js) .header-row { flex-wrap: wrap; padding: 12px var(--gutter); }
  html:not(.js) .nav-toggle { display: none; }
  html:not(.js) .site-nav { flex-wrap: wrap; gap: 12px 20px; width: 100%; }
  html:not(.js) .site-nav ul { flex-wrap: wrap; gap: 8px 20px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}
@media print {
  .site-header, .site-footer, .skip-link, .toc { display: none; }
  body { background: #fff; }
}