/* Rayder Systems — engineering registry / datasheet.
   One family (system monospace), warm-neutral paper, near-black ink, one signal
   accent. No third-party fonts, scripts, or trackers. Palette verified AA. */

:root {
  --paper:        oklch(0.963 0.006 96);
  --paper-deep:   oklch(0.918 0.008 96);
  --ink:          oklch(0.255 0.012 250);
  --ink-soft:     oklch(0.405 0.014 250);
  --muted:        oklch(0.480 0.012 240);
  --rule:         oklch(0.855 0.006 240);
  --rule-strong:  oklch(0.720 0.010 240);
  --accent:       oklch(0.520 0.110 248);
  --accent-deep:  oklch(0.410 0.110 248);
  --stamp:        oklch(0.560 0.130 42);

  --font-mono: ui-monospace, "SF Mono", "SFMono-Regular", Menlo, "Cascadia Mono", Consolas, monospace;
  --page: min(1180px, calc(100% - 3rem));
  --gap: clamp(2rem, 4.5vw, 3.25rem);
}

* { box-sizing: border-box; }
html { font-size: 100%; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.95rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.page { width: var(--page); margin-inline: auto; }

a { color: inherit; }
::selection { background: color-mix(in oklch, var(--accent) 20%, transparent); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 1px; }

.skip {
  position: absolute; left: -9999px; top: 0;
  background: var(--ink); color: var(--paper);
  padding: 0.5rem 0.9rem; font-size: 0.8rem; z-index: 100;
}
.skip:focus { left: 0.5rem; top: 0.5rem; }

/* Masthead */
.masthead {
  position: sticky; top: 0; z-index: 10;
  background: var(--paper);
  border-bottom: 1px solid var(--rule);
}
.masthead-inner {
  display: flex; justify-content: space-between; align-items: baseline;
  gap: 0.6rem 2rem; flex-wrap: wrap; padding-block: 1rem;
}
.wordmark {
  font-size: clamp(1.12rem, 2.4vw, 1.42rem);
  letter-spacing: 0.01em; font-weight: 600; color: var(--ink);
  text-decoration: none; display: inline-flex; align-items: baseline;
}
.caret {
  display: inline-block; width: 0.55ch; height: 1.05em;
  background: var(--accent); margin-left: 0.28ch; transform: translateY(0.14em);
}
.registry-line { display: flex; gap: 1.4rem; margin: 0; flex-wrap: wrap; }
.registry-line div { display: flex; gap: 0.45rem; align-items: baseline; }
.registry-line dt {
  margin: 0; font-size: 0.68rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted);
}
.registry-line dd { margin: 0; font-size: 0.74rem; color: var(--ink-soft); letter-spacing: 0.02em; }

/* Hero */
.hero { padding-block: clamp(3rem, 7vw, 5.5rem) clamp(2rem, 5vw, 3.5rem); }
.statement {
  font-size: clamp(1.7rem, 4.2vw, 2.7rem);
  line-height: 1.12; letter-spacing: -0.02em; font-weight: 600;
  color: var(--ink); margin: 0 0 1.6rem; max-width: 20ch; text-wrap: balance;
}
.lead {
  font-size: clamp(1rem, 1.4vw, 1.12rem); color: var(--ink-soft);
  max-width: 60ch; margin: 0 0 1.6rem; line-height: 1.62; text-wrap: pretty;
}
.hero-contact { margin: 0; }

/* Datasheet rows */
.row {
  display: grid; grid-template-columns: minmax(7rem, 11rem) 1fr;
  gap: clamp(0.75rem, 4vw, 3rem);
  border-top: 1px solid var(--rule); padding-block: var(--gap);
}
.row-head h2 {
  margin: 0; font-weight: 400; font-size: 0.72rem;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted);
  position: sticky; top: 4.5rem;
}
.row-body > :first-child { margin-top: 0; }

/* Practice spec list */
.spec { margin: 0; display: flex; flex-direction: column; }
.spec-item { padding-block: 1.1rem; border-bottom: 1px solid var(--rule); }
.spec-item:first-child { padding-top: 0; }
.spec-item:last-child { border-bottom: 0; padding-bottom: 0; }
.spec-item dt { font-size: 1rem; color: var(--ink); margin-bottom: 0.35rem; letter-spacing: -0.01em; }
.spec-item dd { margin: 0; color: var(--ink-soft); max-width: 62ch; font-size: 0.92rem; }

/* Selected work ledger */
.ledger { margin: 0; padding: 0; list-style: none; display: flex; flex-direction: column; }
.entry { padding-block: 1.35rem; border-bottom: 1px solid var(--rule); }
.entry:first-child { padding-top: 0; }
.entry:last-child { border-bottom: 0; padding-bottom: 0; }
.entry-head { margin: 0 0 0.65rem; display: flex; flex-wrap: wrap; align-items: baseline; gap: 0.2rem 0.85rem; }
.entry-org { color: var(--ink); font-size: 1rem; }
.entry-ctx { color: var(--muted); font-size: 0.76rem; letter-spacing: 0.04em; }
.entry-results { margin: 0; padding: 0; list-style: none; display: flex; flex-direction: column; gap: 0.55rem; }
.entry-results li {
  color: var(--ink-soft); font-size: 0.92rem; max-width: 64ch;
  padding-left: 1.05rem; position: relative;
}
.entry-results li::before {
  content: ""; position: absolute; left: 0; top: 0.6em;
  width: 0.34rem; height: 0.34rem; background: var(--rule-strong);
}
.num { color: var(--accent-deep); }

/* Approach */
.approach { margin: 0; padding: 0; list-style: none; display: flex; flex-direction: column; gap: 0.7rem; max-width: 64ch; }
.approach li { color: var(--ink-soft); padding-left: 1.05rem; position: relative; }
.approach li::before {
  content: ""; position: absolute; left: 0; top: 0.6em;
  width: 0.34rem; height: 0.34rem; background: var(--rule-strong);
}

/* Contact */
.contact-body { margin: 0; max-width: 56ch; color: var(--ink-soft); }
.contact-link {
  color: var(--accent); text-decoration: none;
  border-bottom: 1px solid color-mix(in oklch, var(--accent) 32%, transparent);
  padding-bottom: 1px;
}
.contact-link:hover { color: var(--accent-deep); border-bottom-color: var(--accent-deep); }
.hero-contact .contact-link { font-size: 1.05rem; }

/* Registry footer */
.registry {
  background: var(--paper-deep);
  border-top: 1px solid var(--rule-strong);
  margin-top: clamp(2rem, 5vw, 4rem); padding-block: clamp(2.2rem, 4vw, 3.25rem);
}
.registry-grid { display: grid; gap: 1.1rem 2.5rem; grid-template-columns: 1fr; }
.registry-mark { margin: 0; color: var(--ink); font-size: 0.95rem; display: flex; align-items: center; }
.stamp { display: inline-block; width: 0.72rem; height: 0.72rem; background: var(--stamp); margin-right: 0.6rem; }
.registry-fields { margin: 0; display: flex; flex-wrap: wrap; gap: 0.4rem 2rem; }
.registry-fields div { display: flex; gap: 0.5rem; align-items: baseline; }
.registry-fields dt { margin: 0; font-size: 0.68rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); }
.registry-fields dd { margin: 0; font-size: 0.8rem; color: var(--ink-soft); }
.registry .contact-link { color: var(--accent-deep); border-bottom-color: color-mix(in oklch, var(--accent-deep) 35%, transparent); }
.scope-note { margin: 0; font-size: 0.78rem; color: var(--muted); max-width: 66ch; line-height: 1.55; }
.copyright { margin: 0; font-size: 0.72rem; letter-spacing: 0.04em; color: var(--muted); }

@media (min-width: 760px) {
  .registry-grid { grid-template-columns: 1fr 1fr; align-items: start; }
  .scope-note, .copyright { grid-column: 1 / -1; }
}

/* Responsive: collapse the datasheet to one column */
@media (max-width: 720px) {
  .row { grid-template-columns: 1fr; gap: 0.9rem; }
  .row-head h2 { position: static; }
}

/* Motion: enhances an already-visible page. Off under reduced motion. */
@media (prefers-reduced-motion: no-preference) {
  .wordmark, .registry-line, .statement, .lead, .hero-contact {
    animation: rise 0.62s cubic-bezier(0.16, 1, 0.3, 1) both;
  }
  .registry-line { animation-delay: 0.08s; }
  .statement { animation-delay: 0.05s; }
  .lead { animation-delay: 0.13s; }
  .hero-contact { animation-delay: 0.21s; }
  .caret { animation: blink 1.15s steps(1, end) infinite; animation-delay: 0.9s; }
}
@keyframes rise { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
@keyframes blink { 50% { opacity: 0; } }