/* ================= tokens ================= */
:root {
  --ink: #211F1B;
  --ink-soft: #4A453B;
  --paper: #E8E2D3;
  --paper-raised: #F3EEE0;
  --paper-sunk: #DED7C6;
  --rust: #9A3E1F;
  --rust-deep: #7C321A;
  --moss: #3C5B49;
  --line: #C6BBA2;
  --line-soft: #D5CBB4;
  --muted: #6E6656;
  --on-rust: #F7F2E6;
  --dot: rgba(160, 146, 116, 0.38);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --ink: #EFE9DA; --ink-soft: #C9C0AC; --paper: #17140F; --paper-raised: #221D15;
    --paper-sunk: #110F0B; --rust: #D0713D; --rust-deep: #E58851; --moss: #6C9880;
    --line: #3A3325; --line-soft: #2D2819; --muted: #A79C87; --on-rust: #1A150F;
    --dot: rgba(120, 106, 78, 0.30);
  }
}
:root[data-theme="dark"] {
  --ink: #EFE9DA; --ink-soft: #C9C0AC; --paper: #17140F; --paper-raised: #221D15;
  --paper-sunk: #110F0B; --rust: #D0713D; --rust-deep: #E58851; --moss: #6C9880;
  --line: #3A3325; --line-soft: #2D2819; --muted: #A79C87; --on-rust: #1A150F;
  --dot: rgba(120, 106, 78, 0.30);
}

* { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: calc(68px + env(safe-area-inset-top, 0px));
}

body {
  margin: 0;
  padding-top: env(safe-area-inset-top, 0px);
  padding-bottom: env(safe-area-inset-bottom, 0px);
  background-color: var(--paper);
  background-image: radial-gradient(var(--dot) 1.2px, transparent 1.2px);
  background-size: 24px 24px;
  color: var(--ink);
  font-family: "IBM Plex Sans", "Segoe UI", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: "Space Grotesk", "Segoe UI", system-ui, sans-serif;
  font-weight: 700;
  margin: 0;
  letter-spacing: -0.015em;
  line-height: 1.16;
}

p { margin: 0; }
a { color: var(--rust-deep); }
a:focus-visible, button:focus-visible, input:focus-visible,
select:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--rust);
  outline-offset: 3px;
}

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 28px; }
.wrap-text { max-width: 760px; margin: 0 auto; padding: 0 28px; }
@media (max-width: 560px) { .wrap, .wrap-text { padding: 0 20px; } }

.mono { font-family: "IBM Plex Mono", ui-monospace, monospace; }

/* ================= header ================= */
.masthead {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 50;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}
.masthead-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; height: 68px; }

.brand { display: block; line-height: 0; text-decoration: none; }
.brand svg { width: 38px; height: 38px; display: block; }

.mainnav ul { display: flex; align-items: center; gap: 24px; list-style: none; margin: 0; padding: 0; }
.mainnav a {
  color: var(--ink-soft); text-decoration: none; font-size: 0.89rem; font-weight: 500;
  padding: 6px 0; border-bottom: 2px solid transparent;
}
.mainnav a:hover { color: var(--ink); }
.mainnav a.on { color: var(--ink); border-bottom-color: var(--rust); }

.head-cta { display: inline-flex; }

.burger {
  display: none; width: 42px; height: 38px; align-items: center; justify-content: center;
  background: none; border: 1px solid var(--line); border-radius: 3px; color: var(--ink); cursor: pointer;
}
.burger svg { width: 18px; height: 18px; }

@media (max-width: 980px) {
  .burger { display: inline-flex; }
  .head-cta { display: none; }
  .mainnav {
    position: absolute; left: 0; right: 0; top: 68px;
    background: var(--paper); border-bottom: 1px solid var(--line); display: none;
  }
  .mainnav.open { display: block; }
  .mainnav ul { flex-direction: column; align-items: stretch; gap: 0; max-height: 72vh; overflow-y: auto; }
  .mainnav li { border-top: 1px solid var(--line-soft); }
  .mainnav a { display: block; padding: 15px 28px; border-bottom: none; }
  .mainnav a.on { border-left: 3px solid var(--rust); padding-left: 25px; }
}

/* ================= buttons ================= */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 22px; border: 1px solid transparent; border-radius: 3px;
  font-family: "IBM Plex Sans", sans-serif; font-size: 0.92rem; font-weight: 600;
  text-decoration: none; cursor: pointer;
}
.btn-solid { background: var(--rust); color: var(--on-rust); border-color: var(--rust); }
.btn-solid:hover { background: var(--rust-deep); border-color: var(--rust-deep); }
.btn-line { background: transparent; color: var(--ink); border-color: var(--line); }
.btn-line:hover { border-color: var(--rust); color: var(--rust-deep); }
.btn-sm { padding: 9px 16px; font-size: 0.85rem; }

.textlink { color: var(--rust-deep); font-size: 0.88rem; font-weight: 600; text-decoration: none; border-bottom: 1px solid var(--line); padding-bottom: 2px; }
.textlink:hover { border-bottom-color: var(--rust-deep); }

/* ================= page + sections ================= */
.band { padding: 72px 0; border-bottom: 1px solid var(--line); }
.band-sunk { background: var(--paper-sunk); }
.band-slim { padding: 44px 0; }

.band-head { margin-bottom: 36px; }
.band-index {
  display: flex; align-items: baseline; gap: 14px;
  padding-bottom: 12px; border-bottom: 2px solid var(--rust); margin-bottom: 18px;
}
.band-index span { font-family: "IBM Plex Mono", monospace; font-size: 0.76rem; color: var(--muted); }
.band-index h2 { font-size: clamp(1.4rem, 3.1vw, 1.85rem); }
.band-head p { color: var(--ink-soft); max-width: 66ch; font-size: 1rem; }

.head-flex { display: flex; justify-content: space-between; align-items: flex-end; gap: 20px; flex-wrap: wrap; }

.lede { color: var(--ink-soft); font-size: 1.05rem; max-width: 64ch; }

/* ================= hero ================= */
.hero { padding: 84px 0 76px; border-bottom: 1px solid var(--line); }
.hero-grid { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 56px; align-items: start; }
@media (max-width: 940px) { .hero-grid { grid-template-columns: 1fr; gap: 44px; } }

.eyebrow { font-family: "IBM Plex Mono", monospace; font-size: 0.78rem; color: var(--muted); margin-bottom: 20px; }
.hero h1 { font-size: clamp(2.1rem, 5vw, 3.1rem); max-width: 17ch; }
.hero .lede { margin-top: 22px; }
.hero-actions { margin-top: 32px; display: flex; gap: 12px; flex-wrap: wrap; }

.spec {
  border: 1px solid var(--line); background: var(--paper-raised);
}
.spec-title {
  font-family: "IBM Plex Mono", monospace; font-size: 0.72rem; color: var(--muted);
  padding: 13px 20px; border-bottom: 1px solid var(--line); background: var(--paper-sunk);
}
.spec-row { padding: 18px 20px; border-bottom: 1px solid var(--line-soft); }
.spec-row:last-child { border-bottom: none; }
.spec-row h3 { font-size: 1rem; }
.spec-row p { color: var(--ink-soft); font-size: 0.89rem; margin-top: 5px; }
.spec-row .mark { font-family: "IBM Plex Mono", monospace; font-size: 0.72rem; color: var(--rust-deep); display: block; margin-bottom: 7px; }

/* ================= facts ================= */
.facts { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--line); background: var(--paper-raised); }
@media (max-width: 640px) { .facts { grid-template-columns: 1fr 1fr; } }
.fact { padding: 24px 20px; border-right: 1px solid var(--line-soft); }
.fact:last-child { border-right: none; }
@media (max-width: 640px) {
  .fact:nth-child(2n) { border-right: none; }
  .fact:nth-child(-n+2) { border-bottom: 1px solid var(--line-soft); }
}
.fact b { display: block; font-family: "Space Grotesk", sans-serif; font-size: 1.9rem; color: var(--rust-deep); line-height: 1; }
.fact span { display: block; margin-top: 8px; font-size: 0.82rem; color: var(--muted); }

/* ================= definition rows (core layout device) ================= */
.deflist { border-top: 1px solid var(--line); }
.defrow {
  display: grid; grid-template-columns: 56px 1fr 1.25fr; gap: 24px;
  padding: 24px 0; border-bottom: 1px solid var(--line);
  align-items: start;
}
@media (max-width: 760px) {
  .defrow { grid-template-columns: 44px 1fr; gap: 16px; }
  .defrow .defbody { grid-column: 2 / -1; }
}
.defnum { font-family: "IBM Plex Mono", monospace; font-size: 0.76rem; color: var(--muted); padding-top: 4px; }
.defrow h3 { font-size: 1.1rem; }
.defrow .defmeta { font-family: "IBM Plex Mono", monospace; font-size: 0.72rem; color: var(--muted); margin-top: 6px; }
.defbody p { color: var(--ink-soft); font-size: 0.94rem; }
.defbody ul { margin: 12px 0 0; padding-left: 18px; color: var(--ink-soft); font-size: 0.9rem; }
.defbody li { margin-bottom: 4px; }

/* ================= panel grid ================= */
.panels { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; border: 1px solid var(--line); background: var(--paper-raised); }
.panels-2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 880px) { .panels { grid-template-columns: 1fr 1fr; } }
@media (max-width: 580px) { .panels, .panels-2 { grid-template-columns: 1fr; } }

.panel { padding: 26px 24px 28px; border-right: 1px solid var(--line-soft); border-bottom: 1px solid var(--line-soft); }
.panel h3 { font-size: 1.04rem; }
.panel p { color: var(--ink-soft); font-size: 0.91rem; margin-top: 9px; }
.panel .idx { font-family: "IBM Plex Mono", monospace; font-size: 0.72rem; color: var(--muted); display: block; margin-bottom: 10px; }

/* ================= reviews ================= */
.review-panel { display: flex; flex-direction: column; }
.stars { display: flex; align-items: center; gap: 6px; margin-bottom: 14px; }
.star { width: 15px; height: 15px; color: var(--rust); flex: none; }
.rating-num { font-family: "IBM Plex Mono", monospace; font-size: 0.72rem; color: var(--muted); margin-left: 4px; }
.review-quote { color: var(--ink); font-size: 0.96rem; line-height: 1.55; flex: 1; }
.review-who { margin-top: 18px; padding-top: 14px; border-top: 1px solid var(--line-soft); display: flex; justify-content: space-between; align-items: baseline; gap: 12px; }
.review-who strong { font-family: "Space Grotesk", sans-serif; font-size: 0.94rem; font-weight: 600; }
.review-who span { font-family: "IBM Plex Mono", monospace; font-size: 0.72rem; color: var(--muted); }

/* ================= work table ================= */
.worktable { width: 100%; border-collapse: collapse; }
.worktable th {
  text-align: left; font-family: "IBM Plex Mono", monospace; font-weight: 500;
  font-size: 0.72rem; color: var(--muted); padding: 0 16px 12px 0; border-bottom: 2px solid var(--rust);
}
.worktable td { padding: 20px 16px 20px 0; border-bottom: 1px solid var(--line); vertical-align: top; }
.worktable .name { font-family: "Space Grotesk", sans-serif; font-weight: 600; font-size: 1.05rem; white-space: nowrap; }
.worktable .kind { font-family: "IBM Plex Mono", monospace; font-size: 0.76rem; color: var(--muted); white-space: nowrap; }
.worktable .desc { color: var(--ink-soft); font-size: 0.92rem; }
@media (max-width: 720px) {
  .worktable, .worktable tbody, .worktable tr, .worktable td { display: block; width: 100%; }
  .worktable thead { display: none; }
  .worktable tr { border-bottom: 1px solid var(--line); padding: 20px 0; }
  .worktable td { border-bottom: none; padding: 0 0 6px; }
  .worktable .name { white-space: normal; }
}

/* ================= tech ================= */
.techgroup { margin-bottom: 40px; }
.techgroup > h3 {
  font-family: "IBM Plex Sans", sans-serif; font-weight: 600; font-size: 1.02rem;
  padding-bottom: 10px; border-bottom: 2px solid var(--moss); margin-bottom: 18px;
}
.techsub { display: grid; grid-template-columns: 150px 1fr; gap: 20px; padding: 14px 0; border-bottom: 1px solid var(--line-soft); }
@media (max-width: 620px) { .techsub { grid-template-columns: 1fr; gap: 8px; } }
.techsub > .k { font-family: "IBM Plex Mono", monospace; font-size: 0.76rem; color: var(--muted); padding-top: 4px; }
.taglist { display: flex; flex-wrap: wrap; gap: 8px; }
.taglist span {
  border: 1px solid var(--line); border-radius: 3px; padding: 5px 11px;
  font-size: 0.85rem; color: var(--ink-soft); background: var(--paper-raised);
}

/* ================= contact ================= */
.contact-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 56px; }
@media (max-width: 860px) { .contact-grid { grid-template-columns: 1fr; gap: 40px; } }

.channels { margin-top: 48px; padding-top: 28px; border-top: 1px solid var(--line); }
.channels-label { font-size: 0.73rem; color: var(--muted); }
.channels .iconrow { margin-top: 14px; }

.iconrow { display: flex; gap: 10px; flex-wrap: wrap; }
.iconbtn {
  width: 44px; height: 44px; display: grid; place-items: center;
  border: 1px solid var(--line); border-radius: 3px; background: var(--paper-raised);
  color: var(--ink-soft); text-decoration: none;
}
.iconbtn svg { width: 19px; height: 19px; }
.iconbtn:hover { background: var(--rust); border-color: var(--rust); color: var(--on-rust); }

.field { margin-bottom: 18px; }
.field label { display: block; font-family: "IBM Plex Mono", monospace; font-size: 0.73rem; color: var(--muted); margin-bottom: 7px; }
.field input, .field select, .field textarea {
  width: 100%; background: var(--paper-raised); border: 1px solid var(--line); border-radius: 3px;
  padding: 12px 14px; font-family: "IBM Plex Sans", sans-serif; font-size: 0.95rem; color: var(--ink);
}
.field textarea { resize: vertical; min-height: 120px; }
.formnote { font-size: 0.86rem; color: var(--moss); min-height: 1.3em; margin-top: 12px; }
.formnote[data-state="error"] { color: var(--rust); }

/* ================= callout ================= */
.callout {
  border: 1px solid var(--line); background: var(--paper-raised);
  padding: 34px 32px; display: flex; justify-content: space-between; align-items: center;
  gap: 28px; flex-wrap: wrap;
}
.callout h2 { font-size: clamp(1.3rem, 3vw, 1.7rem); max-width: 22ch; }
.callout p { color: var(--ink-soft); margin-top: 8px; max-width: 50ch; font-size: 0.95rem; }

/* ================= prose ================= */
.prose { color: var(--ink-soft); }
.prose h3 { color: var(--ink); font-size: 1.1rem; margin: 30px 0 10px; }
.prose h3:first-child { margin-top: 0; }
.prose p { margin-bottom: 14px; max-width: 70ch; }

/* ================= simple page ================= */
.simple { padding: 96px 0 104px; }
.simple h1 { font-size: clamp(1.8rem, 4.2vw, 2.4rem); }
.simple p { color: var(--ink-soft); max-width: 60ch; margin-top: 18px; }
.simple .btn { margin-top: 28px; }

/* ================= footer ================= */
.footer { background: var(--paper-sunk); border-top: 1px solid var(--line); padding: 56px 0 36px; }
.footer-top { display: grid; grid-template-columns: 1fr 3fr; gap: 48px; }
@media (max-width: 940px) { .footer-top { grid-template-columns: 1fr; gap: 36px; } }
.footer-brand p { color: var(--ink-soft); font-size: 0.89rem; margin: 16px 0 22px; max-width: 32ch; }
.footer-cols { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; }
@media (max-width: 780px) { .footer-cols { grid-template-columns: 1fr 1fr; } }
@media (max-width: 440px) { .footer-cols { grid-template-columns: 1fr; } }
.footer-col h4 { font-family: "IBM Plex Sans", sans-serif; font-size: 0.8rem; font-weight: 600; margin-bottom: 12px; }
.footer-col ul { list-style: none; margin: 0; padding: 0; }
.footer-col li { margin-bottom: 8px; }
.footer-col a { color: var(--ink-soft); font-size: 0.85rem; text-decoration: none; }
.footer-col a:hover { color: var(--rust-deep); }
.footer-base {
  margin-top: 44px; padding-top: 22px; border-top: 1px solid var(--line);
  display: flex; justify-content: space-between; gap: 18px; flex-wrap: wrap;
  font-size: 0.8rem; color: var(--muted);
}
.footer-base a { color: var(--muted); text-decoration: none; margin-left: 18px; }
.footer-base a:hover { color: var(--rust-deep); }
.footer-base .legal { display: flex; }
.footer-base .legal a:first-child { margin-left: 0; }