/* ════════════════════════════════════════════
   VARIANT F — Engineering Blueprint
   Mechanical drawing × Technical manual
   Blueprint blue bg · White lines · Amber accent
   ════════════════════════════════════════════ */

:root {
  --bg: #0b3d91;
  --bg-deep: #082e70;
  --bg-darker: #061f4e;
  --line: rgba(255, 255, 255, 0.22);
  --line-soft: rgba(255, 255, 255, 0.08);
  --line-grid: rgba(255, 255, 255, 0.055);
  --ink: #ffffff;
  --ink-soft: rgba(255, 255, 255, 0.85);
  --ink-mute: rgba(255, 255, 255, 0.55);
  --amber: #ffcc33;
  --red: #ff4d5e;

  --mono: "Share Tech Mono", "Space Mono", monospace;
  --sans: "Manrope", "Noto Sans KR", sans-serif;

  --max: 1400px;
  --gutter: clamp(20px, 3.5vw, 48px);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.55;
  font-weight: 300;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* 1mm-like grid background */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--line-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-grid) 1px, transparent 1px);
  background-size: 16px 16px;
}
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 80px 80px;
}

main, nav, footer { position: relative; z-index: 2; }

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font: inherit; color: inherit; cursor: pointer; border: 0; background: transparent; }

/* ─────────────────────────────────────────── */
/* NAV (title block)                           */
/* ─────────────────────────────────────────── */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: stretch;
  border-bottom: 1px solid var(--line);
  background: rgba(11, 61, 145, 0.9);
  backdrop-filter: blur(6px);
}
.nav__brand {
  padding: 14px 24px;
  border-right: 1px solid var(--line);
  font-family: var(--mono);
  display: grid;
  gap: 2px;
  align-content: center;
}
.nav__brand .name {
  font-size: 15px;
  letter-spacing: 0.1em;
  color: var(--ink);
}
.nav__brand .dwg {
  font-size: 9px;
  letter-spacing: 0.24em;
  color: var(--amber);
}
.nav__links {
  display: flex;
  align-items: stretch;
  justify-content: center;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}
.nav__links a {
  display: grid;
  place-items: center;
  padding: 0 20px;
  border-right: 1px solid var(--line);
  color: var(--ink-mute);
  transition: color 0.2s ease, background 0.2s ease;
}
.nav__links a:first-child { border-left: 1px solid var(--line); }
.nav__links a:hover { color: var(--amber); }
.nav__links a.is-active { color: var(--bg); background: var(--amber); }
.nav__meta {
  padding: 14px 24px;
  border-left: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--amber);
  display: grid;
  gap: 2px;
  align-content: center;
  text-align: right;
}
@media (max-width: 900px) {
  .nav { grid-template-columns: auto 1fr; }
  .nav__meta { display: none; }
  .nav__links a { padding: 0 10px; font-size: 10px; letter-spacing: 0.14em; }
  .nav__brand .dwg { display: none; }
}

/* ─────────────────────────────────────────── */
/* SECTION                                     */
/* ─────────────────────────────────────────── */
.section {
  padding: clamp(64px, 9vw, 140px) var(--gutter);
  max-width: var(--max);
  margin: 0 auto;
  position: relative;
}

/* Drawing title block (sheet header) */
.sheet-head {
  display: grid;
  grid-template-columns: 110px 1fr 120px;
  align-items: stretch;
  border: 1px solid var(--line);
  margin-bottom: 48px;
}
.sheet-head > div {
  padding: 14px 20px;
  border-right: 1px solid var(--line);
  font-family: var(--mono);
}
.sheet-head > div:last-child { border-right: 0; }
.sheet-head .idx {
  color: var(--amber);
  font-size: 36px;
  line-height: 1;
  letter-spacing: -0.02em;
  display: grid;
  align-content: center;
}
.sheet-head .mid {
  display: grid;
  gap: 4px;
  align-content: center;
}
.sheet-head .mid .t {
  font-family: var(--sans);
  font-weight: 500;
  font-size: clamp(22px, 3vw, 40px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--ink);
}
.sheet-head .mid .k {
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.sheet-head .tag {
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  text-align: right;
  display: grid;
  gap: 4px;
  align-content: center;
}
.sheet-head .tag .amber { color: var(--amber); }
@media (max-width: 720px) {
  .sheet-head { grid-template-columns: 80px 1fr; }
  .sheet-head .tag { display: none; }
  .sheet-head .mid .t { font-size: 22px; }
}

/* ─────────────────────────────────────────── */
/* HERO                                        */
/* ─────────────────────────────────────────── */
.hero {
  padding: 120px var(--gutter) 40px;
  max-width: var(--max);
  margin: 0 auto;
}
.hero__drawing {
  border: 1px solid var(--line);
  padding: 32px;
  position: relative;
  min-height: 60vh;
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 40px;
}
.hero__drawing::before,
.hero__drawing::after {
  content: "";
  position: absolute;
  width: 12px; height: 12px;
  border: 1px solid var(--amber);
  background: var(--bg);
}
.hero__drawing::before { top: -7px; left: -7px; }
.hero__drawing::after { bottom: -7px; right: -7px; }

.hero__strip {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px 24px;
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--line);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.hero__strip span .a { color: var(--amber); }
.hero__strip span .r { color: var(--red); }

.hero__body {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 48px;
  align-items: start;
}
@media (max-width: 900px) { .hero__body { grid-template-columns: 1fr; } }

.hero__title {
  font-weight: 500;
  font-size: clamp(52px, 9vw, 160px);
  line-height: 0.92;
  letter-spacing: -0.045em;
  margin: 0;
}
.hero__title .amber { color: var(--amber); }
.hero__title .mono {
  font-family: var(--mono);
  font-weight: 400;
  letter-spacing: -0.02em;
}
.hero__title sup { font-size: 0.4em; color: var(--amber); }

.hero__side {
  border-left: 1px solid var(--line);
  padding-left: 24px;
  display: grid;
  gap: 18px;
  align-content: start;
}
@media (max-width: 900px) {
  .hero__side { border-left: 0; border-top: 1px solid var(--line); padding: 18px 0 0; }
}
.hero__lede {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
  max-width: 38ch;
}
.hero__dims {
  display: grid;
  gap: 14px;
  font-family: var(--mono);
}
.hero__dim {
  display: grid;
  grid-template-columns: 12px 1fr;
  gap: 10px;
  align-items: baseline;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--line);
}
.hero__dim .tick {
  color: var(--amber);
  font-size: 10px;
  letter-spacing: 0.22em;
}
.hero__dim .pair {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-size: 13px;
  letter-spacing: 0.05em;
}
.hero__dim .pair .k {
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.hero__dim .pair .v { color: var(--ink); }
.hero__dim .pair .v .u { color: var(--amber); margin-left: 4px; }

.hero__foot {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px 24px;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.hero__foot .amber { color: var(--amber); }

/* ─────────────────────────────────────────── */
/* PROCESS MODULES                             */
/* ─────────────────────────────────────────── */
.mods {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border: 1px solid var(--line);
}
@media (max-width: 900px) { .mods { grid-template-columns: 1fr; } }
.mod {
  padding: 28px;
  border-right: 1px solid var(--line);
  position: relative;
  display: grid;
  gap: 16px;
  align-content: start;
}
.mod:last-child { border-right: 0; }
@media (max-width: 900px) {
  .mod { border-right: 0; border-bottom: 1px solid var(--line); }
  .mod:last-child { border-bottom: 0; }
}
.mod__dial {
  width: 72px;
  height: 72px;
  border-radius: 999px;
  border: 1px dashed var(--line);
  display: grid;
  place-items: center;
  position: relative;
}
.mod__dial::before {
  content: "";
  position: absolute;
  inset: 8px;
  border: 1px solid var(--amber);
  border-radius: 999px;
}
.mod__dial span {
  font-family: var(--mono);
  font-size: 22px;
  color: var(--amber);
  letter-spacing: -0.02em;
}
.mod__id {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.mod__id .amber { color: var(--amber); }
.mod h3 {
  font-weight: 500;
  font-size: 24px;
  line-height: 1.1;
  margin: 0;
  letter-spacing: -0.01em;
}
.mod h3 .amber { color: var(--amber); }
.mod p {
  margin: 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--ink-soft);
}
.mod__rows {
  border-top: 1px dashed var(--line);
  padding-top: 12px;
  display: grid;
  gap: 6px;
  font-family: var(--mono);
  font-size: 11px;
}
.mod__rows .row { display: flex; justify-content: space-between; }
.mod__rows .k { color: var(--ink-mute); text-transform: uppercase; font-size: 10px; letter-spacing: 0.2em; }

/* ─────────────────────────────────────────── */
/* DIMENSION READOUT                           */
/* ─────────────────────────────────────────── */
.dim-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--line);
  position: relative;
}
@media (max-width: 860px) { .dim-bar { grid-template-columns: 1fr 1fr; } }
.dim-bar > div {
  padding: 28px 24px;
  border-right: 1px solid var(--line);
}
.dim-bar > div:last-child { border-right: 0; }
@media (max-width: 860px) {
  .dim-bar > div:nth-child(2n) { border-right: 0; }
  .dim-bar > div:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
}
.dim-bar .k {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--amber);
  margin-bottom: 12px;
}
.dim-bar .v {
  font-family: var(--mono);
  font-size: clamp(36px, 4.2vw, 56px);
  line-height: 1;
  letter-spacing: -0.03em;
}
.dim-bar .v sup { font-size: 0.55em; color: var(--amber); }
.dim-bar .v .u { font-size: 0.32em; color: var(--amber); margin-left: 6px; letter-spacing: 0.04em; font-family: var(--sans); }
.dim-bar .scale {
  margin-top: 18px;
  height: 8px;
  background: var(--line-soft);
  position: relative;
}
.dim-bar .scale::before {
  content: "";
  position: absolute;
  inset: 0 var(--to, 60%) 0 0;
  background: var(--amber);
}

/* ─────────────────────────────────────────── */
/* PLACEHOLDER (drawing sheet)                 */
/* ─────────────────────────────────────────── */
.ph {
  border: 1px solid var(--line);
  background:
    linear-gradient(var(--line-soft) 1px, transparent 1px) 0 0 / 100% 20px,
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px) 0 0 / 20px 100%,
    var(--bg);
  padding: 18px 20px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-mute);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  aspect-ratio: 4 / 3;
  position: relative;
}
.ph::before {
  content: "";
  position: absolute;
  inset: 12px;
  border: 1px dashed var(--amber);
  pointer-events: none;
}
.ph__head { display: flex; justify-content: space-between; z-index: 1; position: relative; }
.ph__head .id { color: var(--amber); }
.ph__body {
  z-index: 1;
  position: relative;
  text-align: center;
  align-self: center;
  font-family: var(--sans);
  font-weight: 500;
  font-size: 22px;
  letter-spacing: -0.01em;
  color: var(--ink);
  text-transform: none;
}
.ph__foot { display: flex; justify-content: space-between; z-index: 1; position: relative; }
.ph--wide { aspect-ratio: 16 / 9; }
.ph--sq { aspect-ratio: 1 / 1; }

/* ─────────────────────────────────────────── */
/* MATERIAL CALLOUT                            */
/* ─────────────────────────────────────────── */
.mats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}
.mats > div {
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 24px 20px;
  display: grid;
  gap: 10px;
  align-content: start;
}
.mats .n {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.24em;
  color: var(--amber);
}
.mats .name {
  font-weight: 500;
  font-size: 20px;
  letter-spacing: -0.01em;
}
.mats .spec {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-mute);
  letter-spacing: 0.08em;
}
@media (max-width: 860px) { .mats { grid-template-columns: repeat(2, 1fr); } }

/* ─────────────────────────────────────────── */
/* TIMELINE (revision table)                   */
/* ─────────────────────────────────────────── */
.revs {
  border: 1px solid var(--line);
}
.rev-row {
  display: grid;
  grid-template-columns: 110px 120px 1fr 120px;
  gap: 16px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 12px;
  align-items: baseline;
}
.rev-row:last-child { border-bottom: 0; }
.rev-row:nth-child(odd) { background: rgba(255,255,255,0.02); }
.rev-row .year { color: var(--amber); font-size: 20px; letter-spacing: -0.02em; }
.rev-row .code { color: var(--ink-mute); letter-spacing: 0.2em; text-transform: uppercase; font-size: 10px; }
.rev-row .msg { font-family: var(--sans); font-size: 14px; color: var(--ink); }
.rev-row .tag { text-align: right; color: var(--amber); letter-spacing: 0.2em; text-transform: uppercase; font-size: 10px; }
@media (max-width: 720px) {
  .rev-row { grid-template-columns: 1fr 1fr; }
  .rev-row .msg { grid-column: 1 / -1; }
  .rev-row .tag { text-align: left; }
}

/* ─────────────────────────────────────────── */
/* CLIENT / CERT GRID                          */
/* ─────────────────────────────────────────── */
.grid-cells {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  border: 1px solid var(--line);
}
.grid-cells > div {
  aspect-ratio: 3 / 2;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  display: grid;
  place-items: center;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.grid-cells > div strong {
  font-family: var(--sans);
  font-weight: 500;
  color: var(--ink);
  font-size: 15px;
  letter-spacing: -0.01em;
  text-transform: none;
}
.grid-cells > div:nth-child(6n) { border-right: 0; }
.grid-cells > div:nth-last-child(-n+6) { border-bottom: 0; }
@media (max-width: 860px) {
  .grid-cells { grid-template-columns: repeat(3, 1fr); }
  .grid-cells > div { border-right: 1px solid var(--line); }
  .grid-cells > div:nth-child(3n) { border-right: 0; }
  .grid-cells > div:nth-last-child(-n+3) { border-bottom: 0; }
}

/* ─────────────────────────────────────────── */
/* PAGE HEAD                                   */
/* ─────────────────────────────────────────── */
.pagehead {
  padding: 120px var(--gutter) 40px;
  max-width: var(--max);
  margin: 0 auto;
}
.pagehead__drawing {
  border: 1px solid var(--line);
  padding: 28px;
  position: relative;
}
.pagehead__drawing::before,
.pagehead__drawing::after {
  content: "";
  position: absolute;
  width: 10px; height: 10px;
  border: 1px solid var(--amber);
  background: var(--bg);
}
.pagehead__drawing::before { top: -6px; left: -6px; }
.pagehead__drawing::after { bottom: -6px; right: -6px; }
.pagehead__meta {
  display: flex;
  justify-content: space-between;
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--line);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.pagehead__meta .amber { color: var(--amber); }
.pagehead__title {
  margin: 32px 0 0;
  font-weight: 500;
  font-size: clamp(48px, 8vw, 140px);
  line-height: 0.92;
  letter-spacing: -0.045em;
}
.pagehead__title .amber { color: var(--amber); }
.pagehead__title .mono { font-family: var(--mono); font-weight: 400; }
.pagehead__lede {
  margin-top: 28px;
  max-width: 56ch;
  font-size: 16px;
  line-height: 1.7;
  color: var(--ink-soft);
}

/* ─────────────────────────────────────────── */
/* TWO-COL                                     */
/* ─────────────────────────────────────────── */
.two-col {
  margin-top: 40px;
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 48px;
}
@media (max-width: 860px) { .two-col { grid-template-columns: 1fr; } }
.two-col h3 {
  font-family: var(--mono);
  font-weight: 400;
  font-size: 22px;
  margin: 0 0 14px;
  letter-spacing: -0.01em;
  color: var(--amber);
}
.two-col p { font-size: 15px; line-height: 1.75; color: var(--ink-soft); }
.two-col p + p { margin-top: 12px; }

/* ─────────────────────────────────────────── */
/* EQUIPMENT (datasheet)                       */
/* ─────────────────────────────────────────── */
.sheet {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border: 1px solid var(--line);
}
@media (max-width: 860px) { .sheet { grid-template-columns: 1fr; } }
.sheet__cell {
  padding: 28px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  display: grid;
  gap: 18px;
  align-content: start;
}
.sheet__cell:nth-child(2n) { border-right: 0; }
.sheet__cell:nth-last-child(-n+2) { border-bottom: 0; }
@media (max-width: 860px) {
  .sheet__cell { border-right: 0; border-bottom: 1px solid var(--line); }
  .sheet__cell:last-child { border-bottom: 0; }
}
.sheet__head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.sheet__id {
  font-family: var(--mono);
  font-size: 48px;
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--ink);
}
.sheet__id .amber { color: var(--amber); }
.sheet__status {
  padding: 4px 10px;
  border: 1px solid var(--ink);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}
.sheet__status.new { color: var(--amber); border-color: var(--amber); }
.sheet__rows {
  display: grid;
  gap: 8px;
  font-family: var(--mono);
  font-size: 12px;
}
.sheet__rows .row { display: grid; grid-template-columns: 140px 1fr; gap: 12px; align-items: baseline; }
.sheet__rows .k {
  color: var(--ink-mute);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}
.sheet__rows .v { color: var(--ink); }

/* ─────────────────────────────────────────── */
/* FORM                                        */
/* ─────────────────────────────────────────── */
.form {
  display: grid;
  gap: 16px;
  border: 1px solid var(--line);
  padding: 28px;
  position: relative;
}
.form::before,
.form::after {
  content: "";
  position: absolute;
  width: 10px; height: 10px;
  border: 1px solid var(--amber);
  background: var(--bg);
}
.form::before { top: -6px; left: -6px; }
.form::after { bottom: -6px; right: -6px; }
.form label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--amber);
}
.form input, .form textarea, .form select {
  width: 100%;
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--line);
  padding: 10px 0 12px;
  font-family: var(--mono);
  font-size: 14px;
  color: var(--ink);
}
.form textarea { min-height: 120px; resize: vertical; }
.form input:focus, .form textarea:focus, .form select:focus { outline: 0; border-bottom-color: var(--amber); }
.form .submit {
  justify-self: start;
  margin-top: 8px;
  padding: 14px 26px;
  background: var(--amber);
  color: var(--bg);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

/* ─────────────────────────────────────────── */
/* CTA                                         */
/* ─────────────────────────────────────────── */
.cta {
  margin: clamp(80px, 10vw, 140px) var(--gutter);
  max-width: var(--max);
  margin-left: auto;
  margin-right: auto;
  padding: 48px;
  border: 1px solid var(--line);
  display: grid;
  grid-template-columns: 1.3fr auto;
  gap: 40px;
  align-items: center;
  position: relative;
}
.cta::before,
.cta::after {
  content: "";
  position: absolute;
  width: 14px; height: 14px;
  border: 1px solid var(--amber);
  background: var(--bg);
}
.cta::before { top: -8px; left: -8px; }
.cta::after { bottom: -8px; right: -8px; }
@media (max-width: 720px) { .cta { grid-template-columns: 1fr; padding: 32px 24px; } }
.cta h2 {
  margin: 0;
  font-weight: 500;
  font-size: clamp(28px, 3.6vw, 56px);
  line-height: 1;
  letter-spacing: -0.03em;
}
.cta h2 .amber { color: var(--amber); }
.cta h2 .mono { font-family: var(--mono); font-weight: 400; }
.cta__row { display: flex; gap: 12px; flex-wrap: wrap; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  padding: 14px 22px;
  border: 1px solid var(--ink);
  color: var(--ink);
  transition: background 0.2s ease, color 0.2s ease;
}
.btn:hover { background: var(--amber); color: var(--bg); border-color: var(--amber); }
.btn--solid { background: var(--amber); color: var(--bg); border-color: var(--amber); }
.btn--solid:hover { background: var(--ink); color: var(--bg); border-color: var(--ink); }

/* ─────────────────────────────────────────── */
/* FOOTER (title block)                        */
/* ─────────────────────────────────────────── */
.foot {
  border-top: 1px solid var(--line);
  padding: 64px var(--gutter) 32px;
  background: var(--bg-deep);
}
.foot__inner {
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 40px;
}
@media (max-width: 860px) { .foot__inner { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .foot__inner { grid-template-columns: 1fr; } }
.foot h5 {
  margin: 0 0 14px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--amber);
}
.foot p, .foot li { font-size: 13px; line-height: 1.7; color: var(--ink-soft); }
.foot ul { list-style: none; padding: 0; margin: 0; }
.foot__brand {
  font-family: var(--mono);
  font-size: 20px;
  letter-spacing: 0.1em;
  margin-bottom: 12px;
  color: var(--ink);
}
.foot__brand .amber { color: var(--amber); }
.foot__bottom {
  max-width: var(--max);
  margin: 48px auto 0;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-mute);
}