/* =============================================================================
   Residual Frequencies — grok-install
   Cinnabar palette · Instrument Serif Italic + IBM Plex Mono
   Phase 2.5 landing system. Tokens locked; do not modify.
   ============================================================================= */

/* ---- 1. Self-hosted fonts (latin subset, woff2) --------------------------- */

@font-face {
  font-family: 'Instrument Serif';
  font-style: italic;
  font-weight: 400;
  font-display: swap;
  src: url('fonts/InstrumentSerif-Italic.woff2') format('woff2');
}

@font-face {
  font-family: 'IBM Plex Mono';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('fonts/IBMPlexMono-Regular.woff2') format('woff2');
}

@font-face {
  font-family: 'IBM Plex Mono';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('fonts/IBMPlexMono-Bold.woff2') format('woff2');
}

/* ---- 2. Tokens ------------------------------------------------------------ */

:root {
  --bg:         #0a0706;
  --bone:       #ead5bd;
  --bone-dim:   #baa590;
  --bone-faint: #7c6c5f;
  --grid:       #f5e8d8;
  --accent:     #d44936;

  --font-serif: 'Instrument Serif', Georgia, serif;
  --font-mono:  'IBM Plex Mono', 'Courier New', monospace;
}

/* ---- 3. Reset ------------------------------------------------------------- */

*,
*::before,
*::after { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--bone);
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 400;
  line-height: 1.5;
  letter-spacing: 0.02em;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

img, svg { display: block; max-width: 100%; }

a {
  color: var(--bone);
  text-decoration: none;
  border-bottom: 1px solid var(--bone-faint);
  transition: color 200ms ease, border-color 200ms ease;
}

a:hover,
a:focus-visible {
  color: var(--accent);
  border-color: var(--accent);
}

a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

button {
  font: inherit;
  background: transparent;
  color: inherit;
}

.skip-link {
  position: absolute;
  top: -200px;
  left: 0;
  padding: 12px 18px;
  background: var(--accent);
  color: var(--bg);
  border: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-size: 13px;
  z-index: 100;
}

.skip-link:focus { top: 0; }

/* ---- 4. Living background ------------------------------------------------- */

.bg-canvas {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  pointer-events: none;
}

.curve-1 { animation: drift1 55s linear infinite; }
.curve-2 { animation: drift2 70s linear infinite; }
.curve-3 { animation: drift3 45s linear infinite; }

@keyframes drift1 {
  from { transform: translateX(0); }
  to   { transform: translateX(-360px); }
}
@keyframes drift2 {
  from { transform: translateX(0); }
  to   { transform: translateX(360px); }
}
@keyframes drift3 {
  from { transform: translateX(0); }
  to   { transform: translateX(-240px); }
}

/* ---- 5. Page frame -------------------------------------------------------- */

.page-frame {
  position: relative;
  max-width: 1440px;
  margin: 0 auto;
  padding: 44px;
  min-height: 100vh;
}

/* ---- 6. Registration crosses --------------------------------------------- */

.registration-cross {
  position: absolute;
  width: 22px;
  height: 22px;
  pointer-events: none;
  opacity: 0.9;
  animation: pulse 8s ease-in-out infinite;
}

.registration-cross::before,
.registration-cross::after {
  content: '';
  position: absolute;
  background: var(--bone);
}

.registration-cross::before {
  top: 50%;
  left: 0;
  right: 0;
  height: 1.5px;
  transform: translateY(-50%);
}

.registration-cross::after {
  left: 50%;
  top: 0;
  bottom: 0;
  width: 1.5px;
  transform: translateX(-50%);
}

.registration-cross.top-left     { top: 16px;    left: 16px; }
.registration-cross.top-right    { top: 16px;    right: 16px; }
.registration-cross.bottom-left  { bottom: 16px; left: 16px; }
.registration-cross.bottom-right { bottom: 16px; right: 16px; }

@keyframes pulse {
  0%, 100% { opacity: 0.6; }
  50%      { opacity: 0.9; }
}

/* ---- 7. Nav -------------------------------------------------------------- */

.site-nav {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  padding: 0 0 28px 0;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.site-nav a {
  color: var(--bone);
  border-bottom: 0;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--accent);
}

/* ---- 8. Header strip + dividers ------------------------------------------ */

.header-strip {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--bone);
}

.header-divider,
.title-divider,
.footer-divider {
  border: 0;
  border-top: 1px solid var(--bone-faint);
  opacity: 0.65;
  margin: 16px 0;
}

.title-divider {
  border-top-width: 1.5px;
  margin: 28px 0 18px 0;
}

.footer-divider {
  border-top-width: 1.5px;
  margin: 48px 0 24px 0;
}

/* ---- 9. Title block ------------------------------------------------------ */

.title-block {
  margin: 36px 0 8px 0;
}

.title-block h1 {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(56px, 8vw, 96px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--bone);
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 24px;
}

.title-block .plate-no {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(40px, 6vw, 86px);
  letter-spacing: -0.01em;
  color: var(--accent);
  line-height: 1;
}

/* ---- 10. Subtitle -------------------------------------------------------- */

.subtitle {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--bone);
  margin: 0;
}

/* ---- 11. Plate body ------------------------------------------------------ */

.plate-body {
  max-width: 1200px;
  margin: 48px auto 0 auto;
}

.plate-body h2 {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--bone);
  margin: 56px 0 20px 0;
}

.plate-body h2:first-child { margin-top: 0; }

.plate-body p {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 400;
  line-height: 1.65;
  letter-spacing: 0.02em;
  color: var(--bone);
  margin: 0 0 20px 0;
  max-width: 72ch;
}

.plate-body ul,
.plate-body ol {
  padding-left: 22px;
  margin: 0 0 20px 0;
}

.plate-body li {
  margin: 0 0 8px 0;
  color: var(--bone);
}

.plate-body code {
  font-family: var(--font-mono);
  font-size: 0.92em;
  color: var(--bone);
  background: rgba(245, 232, 216, 0.06);
  border: 1px solid rgba(124, 108, 95, 0.4);
  padding: 1px 6px;
  border-radius: 2px;
}

.plate-body pre {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 400;
  color: var(--bone);
  background: #100a08;
  border: 1.5px solid rgba(124, 108, 95, 0.55);
  padding: 24px;
  margin: 0 0 24px 0;
  overflow-x: auto;
  line-height: 1.55;
}

.plate-body pre code {
  background: transparent;
  border: 0;
  padding: 0;
  font-size: inherit;
}

.hero-banner {
  display: block;
  width: 100%;
  margin: 32px 0;
  border: 1.5px solid rgba(124, 108, 95, 0.55);
}

/* ---- 12. Card grid ------------------------------------------------------- */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
  margin: 16px 0 28px 0;
}

.card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 24px;
  border: 1.5px solid rgba(124, 108, 95, 0.55);
  background: transparent;
  transition: border-color 200ms ease, transform 200ms ease;
  color: var(--bone);
  text-decoration: none;
}

.card:hover,
.card:focus-within {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.card .card-title {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--bone);
  margin: 0;
}

.card p {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.55;
  color: var(--bone);
  margin: 0;
  max-width: none;
}

.card .card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: auto 0 0 0;
}

.card .chip {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--bone-dim);
  border: 1px solid var(--bone-faint);
  padding: 3px 8px;
}

.card .view-link {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  border-bottom: 1px solid var(--accent);
  align-self: flex-start;
  margin-top: 4px;
}

/* ---- 13. Mint CTA -------------------------------------------------------- */

.cta-wrap {
  display: flex;
  justify-content: center;
  margin: 48px 0;
}

.cta-mint {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--bone);
  background: transparent;
  border: 1.5px solid rgba(234, 213, 189, 0.7);
  padding: 20px 36px;
  cursor: pointer;
  transition: border-color 250ms ease, padding 250ms ease, font-size 250ms ease,
              letter-spacing 250ms ease, color 250ms ease;
  -webkit-tap-highlight-color: transparent;
}

.cta-mint:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

.cta-mint.terminal {
  border-color: var(--accent);
  padding: 14px 24px;
  font-size: 13px;
  letter-spacing: 0;
  text-transform: none;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
}

.cta-mint.terminal .cmd { color: var(--bone); }

.cta-mint.terminal .cursor {
  display: inline-block;
  width: 10px;
  height: 14px;
  background: var(--accent);
  margin-left: 6px;
  vertical-align: middle;
  animation: blink 1s steps(2) infinite;
}

.cta-mint.copied {
  border-color: var(--accent);
  color: var(--accent);
}

@keyframes blink {
  50% { opacity: 0; }
}

/* ---- 14. Standards list (standard.html) ---------------------------------- */

.std-list {
  list-style: none;
  padding: 0;
  margin: 0 0 24px 0;
  border-top: 1px solid rgba(124, 108, 95, 0.4);
}

.std-list li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 24px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(124, 108, 95, 0.4);
  margin: 0;
}

.std-list .std-row {
  display: flex;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
}

.std-list .std-name {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--bone);
}

.std-list .std-desc {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 400;
  color: var(--bone);
}

.std-list .std-view {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  border-bottom: 1px solid var(--accent);
}

/* ---- 15. Footer ---------------------------------------------------------- */

.site-footer {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
  padding: 0 0 16px 0;
}

.site-footer .caption {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  font-size: 22px;
  line-height: 1.4;
  color: var(--bone);
  max-width: 50%;
}

.site-footer .tech-stack {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--bone);
  line-height: 1.7;
  text-align: right;
}

/* ---- 16. Reduced motion -------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0s !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0s !important;
  }
  .curve-1,
  .curve-2,
  .curve-3,
  .registration-cross,
  .cta-mint .cursor {
    animation: none !important;
  }
  .registration-cross { opacity: 0.75; }
}

/* ---- 17. Mobile ---------------------------------------------------------- */

@media (max-width: 768px) {
  .page-frame { padding: 24px; }

  .registration-cross { width: 18px; height: 18px; }
  .registration-cross.top-left     { top: 12px;    left: 12px; }
  .registration-cross.top-right    { top: 12px;    right: 12px; }
  .registration-cross.bottom-left  { bottom: 12px; left: 12px; }
  .registration-cross.bottom-right { bottom: 12px; right: 12px; }

  .title-block h1 {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  .header-strip { font-size: 12px; letter-spacing: 0.14em; }
  .site-footer { flex-direction: column; }
  .site-footer .caption { max-width: 100%; font-size: 19px; }
  .site-footer .tech-stack { text-align: left; }
  .card-grid { grid-template-columns: 1fr; }
  .std-list li { flex-direction: column; gap: 6px; align-items: flex-start; }
  .cta-mint.terminal {
    white-space: normal;
    word-break: break-all;
    text-align: left;
  }
  .plate-body pre { padding: 16px; font-size: 13px; }
}