/* ============================================================
   Crossings - site.css
   Stack-agnostic static sketch. Tokens per TOKEN-PLAN.md.
   Motion: MOTION_INTENSITY 6. All motion is transform + opacity.
   ============================================================ */

/* ---------- Tokens ---------- */
:root {
  --paper: #F5F7FA;
  --navy: #0B1F3A;
  --teal: #0E7C86;
  --stamp: #C45C26;
  --rule: #C9D2DE;

  --ink: var(--navy);
  --muted: #3A5170;          /* 7.5:1 on paper */
  --paper-80: rgba(245, 247, 250, 0.82);
  --paper-60: rgba(245, 247, 250, 0.62);
  --line-soft: rgba(245, 247, 250, 0.22);
  --tint: #EEF2F7;
  --frame: #E3E9F0;

  --serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --sans: "Source Sans 3", "Helvetica Neue", Helvetica, sans-serif;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.2, 1.4, 0.3, 1);
}

/* ---------- Fonts (self-hosted, variable) ---------- */
@font-face {
  font-family: "Source Serif 4";
  src: url("fonts/SourceSerif4-var.woff2") format("woff2");
  font-weight: 200 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Source Sans 3";
  src: url("fonts/SourceSans3-var.woff2") format("woff2");
  font-weight: 200 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Source Sans 3";
  src: url("fonts/SourceSans3-Italic-var.woff2") format("woff2");
  font-weight: 400;
  font-style: italic;
  font-display: swap;
}

/* ---------- Reset / base ---------- */
*,
*::before,
*::after { box-sizing: border-box; margin: 0; padding: 0; }

html { color-scheme: light; }
@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

body {
  background: var(--paper);
  color: var(--ink);
  font: 400 1.0625rem/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { display: block; max-width: 100%; height: auto; background: var(--frame); }

h1, h2, h3 {
  font-family: var(--serif);
  font-optical-sizing: auto;
  line-height: 1.08;
  letter-spacing: -0.015em;
  font-weight: 700;
  text-wrap: balance;
}

a { color: var(--teal); text-decoration-thickness: 1px; text-underline-offset: 4px; }
a:hover { text-decoration-thickness: 2px; }

::selection { background: var(--navy); color: var(--paper); }

section { scroll-margin-top: 84px; }

.wrap { max-width: 1200px; margin-inline: auto; padding-inline: clamp(20px, 4vw, 48px); }

.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  clip-path: inset(50%); overflow: hidden; white-space: nowrap;
}

.skip {
  position: absolute; left: 16px; top: -48px; z-index: 100;
  background: var(--navy); color: var(--paper);
  padding: 10px 16px; font-weight: 600; text-decoration: none;
  transition: top 120ms ease-out;
}
.skip:focus-visible { top: 12px; }

a:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 3px;
}

/* ---------- Buttons (shape lock: all sharp) ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 0.85rem 1.5rem;
  font: 600 1rem/1 var(--sans);
  letter-spacing: 0.01em;
  text-decoration: none;
  border: 1px solid transparent;
  transition: background-color 160ms ease-out, border-color 160ms ease-out,
              color 160ms ease-out, transform 120ms ease-out;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--navy); color: var(--paper); }
.btn-primary:hover { background: var(--teal); }
.btn-ghost { color: var(--navy); border-color: var(--navy); background: transparent; }
.btn-ghost:hover { color: var(--teal); border-color: var(--teal); }
.btn-invert { background: var(--paper); color: var(--navy); }
.btn-invert:hover { background: var(--teal); color: var(--paper); }
.contact a:focus-visible,
.site-foot a:focus-visible { outline-color: var(--paper); }

/* ---------- Header ---------- */
.site-head {
  position: sticky; top: 0; z-index: 50;
  background: rgba(245, 247, 250, 0.94);
  border-bottom: 1px solid var(--rule);
}
.head-row {
  display: flex; align-items: center; gap: 28px;
  min-height: 64px;
}
.brand {
  display: flex; align-items: baseline; gap: 12px;
  text-decoration: none; color: var(--navy);
}
.brand:hover { color: var(--teal); }
.brand-mark {
  align-self: center;
  display: inline-flex; align-items: center; justify-content: center;
  width: 28px; height: 28px;
  border: 2px solid currentColor;
  font: 700 0.95rem/1 var(--serif);
  transform: rotate(-4deg);
}
.brand-name { font: 700 1.25rem/1 var(--serif); letter-spacing: -0.01em; }
.brand-sub {
  font-size: 0.75rem; color: var(--muted);
  border-left: 1px solid var(--rule); padding-left: 12px;
}
.site-nav { margin-left: auto; display: flex; align-items: center; gap: 26px; }
.site-nav a {
  color: var(--navy); font-weight: 600; font-size: 0.975rem; text-decoration: none;
}
.site-nav a:hover { color: var(--teal); text-decoration: underline; text-underline-offset: 6px; }
.btn-nav { padding: 0.6rem 1.1rem; font-size: 0.925rem; }
.btn-nav:hover { color: var(--paper); }
/* CX-CONTRAST-01: .site-nav a { color: navy } beats .btn-primary — force paper label */
.site-nav a.btn-primary,
.menu-panel a.btn-primary { color: var(--paper); }
.site-nav a.btn-primary:hover,
.menu-panel a.btn-primary:hover { color: var(--paper); background: var(--teal); }

.menu { display: none; }
.menu summary {
  list-style: none; cursor: pointer;
  font: 600 0.925rem var(--sans); color: var(--navy);
  border: 1px solid var(--navy); padding: 0.5rem 0.9rem;
}
.menu summary::-webkit-details-marker { display: none; }
.menu[open] summary { background: var(--navy); color: var(--paper); }
.menu-panel {
  position: absolute; left: 0; right: 0; top: 100%;
  background: var(--paper); border-bottom: 1px solid var(--rule);
  display: flex; flex-direction: column;
}
.menu-panel a {
  padding: 14px 24px; color: var(--navy); font-weight: 600; text-decoration: none;
  border-top: 1px solid var(--rule);
}
.menu-panel a:hover { color: var(--teal); background: var(--tint); }
.menu-panel .btn { margin: 14px 24px 18px; border-top: 0; padding: 0.85rem 1.5rem; }
.menu-panel .btn:hover { background: var(--teal); color: var(--paper); }

/* ---------- Stamp (signature mark, CSS only) ---------- */
.stamp {
  position: relative;
  display: inline-flex; flex-direction: column; align-items: center; gap: 3px;
  padding: 10px 16px 12px;
  border: 2px solid var(--stamp);
  color: var(--stamp);
  background: transparent;
  transform: rotate(-8deg);
  mix-blend-mode: multiply;
  user-select: none;
}
.stamp::before {
  content: ""; position: absolute; inset: 3px;
  border: 1px solid var(--stamp);
  pointer-events: none;
}
.stamp-line {
  font: 600 0.625rem/1 var(--sans);
  letter-spacing: 0.28em; text-transform: uppercase;
}
.stamp-big {
  font: 700 1.05rem/1.1 var(--serif);
  letter-spacing: 0.14em; text-transform: uppercase;
}

/* ---------- Hero ---------- */
.hero { padding-block: clamp(40px, 6vw, 84px) clamp(56px, 8vw, 104px); overflow: hidden; }
.hero-grid {
  display: grid; grid-template-columns: 1.12fr 0.88fr;
  gap: clamp(32px, 5vw, 72px); align-items: center;
}
.hero h1 {
  font-size: clamp(2.6rem, 4.4vw + 0.7rem, 4.3rem);
  max-width: 12ch;
}
.hero-sub {
  margin-top: 22px;
  font-size: 1.15rem; color: var(--muted);
  max-width: 37ch;
}
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.hero-fig { position: relative; }
.hero-fig img {
  width: 100%; aspect-ratio: 4 / 3; object-fit: cover;
  border: 1px solid var(--rule);
  box-shadow: 18px 18px 0 var(--frame);
}
.stamp-hero {
  position: absolute; top: -26px; right: -14px;
}
.hero-fig:hover .stamp-hero { transform: rotate(-8deg) scale(0.92) translateY(3px); }

/* ---------- Section scaffolding ---------- */
.routes, .process, .about, .faq { padding-block: clamp(64px, 9vw, 120px); }
h2 { font-size: clamp(1.9rem, 2.4vw + 0.6rem, 2.75rem); max-width: 22ch; }
.section-intro {
  margin-top: 14px; color: var(--muted); max-width: 52ch; font-size: 1.0625rem;
}
.eyebrow {
  font: 600 0.75rem/1 var(--sans);
  letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 16px;
}

/* ---------- Routes (asymmetric tile grid: wide card + 2) ---------- */
.routes-grid {
  margin-top: clamp(36px, 5vw, 56px);
  display: grid; grid-template-columns: 1fr 1fr;
  grid-template-rows: auto 1fr; gap: 20px;
}
.tile { padding: 34px; display: flex; flex-direction: column; }
.tile h3 { font-size: 1.55rem; }
.tile p { margin-top: 12px; max-width: 46ch; }
.tile-fact {
  margin-top: auto; padding-top: 16px;
  font: 600 0.75rem/1.5 var(--sans);
  letter-spacing: 0.14em; text-transform: uppercase;
}

.tile-work {
  grid-column: 1 / -1;
  background: var(--navy); color: var(--paper);
  flex-direction: row; flex-wrap: wrap; align-items: baseline; gap: 20px 40px;
}
.tile-work h3 { font-size: 1.55rem; }
.tile-work p { flex: 1 1 340px; margin-top: 0; color: var(--paper-80); max-width: 52ch; }
.tile-work .tile-fact {
  margin-top: 0; padding-top: 0;
  border-left: 1px solid var(--line-soft); padding-left: 28px;
  color: var(--paper-60); white-space: nowrap;
}

.tile-family { background: var(--paper); border: 1px solid var(--rule); }
.tile-family img {
  margin: -34px -34px 22px; width: calc(100% + 68px);
  aspect-ratio: 16 / 9; object-fit: cover;
  border-bottom: 1px solid var(--rule);
}
.tile-family .tile-fact { color: var(--muted); border-top: 1px solid var(--rule); }

.tile-study {
  background:
    repeating-linear-gradient(135deg, transparent 0 10px, rgba(201, 210, 222, 0.28) 10px 11px),
    var(--paper);
  border: 1px solid var(--rule);
}
.tile-study .tile-fact { color: var(--muted); border-top: 1px solid var(--rule); }

/* ---------- Process (vertical route line) ---------- */
.steps {
  margin-top: clamp(36px, 5vw, 56px);
  list-style: none; position: relative; max-width: 760px;
}
.steps::before {
  content: ""; position: absolute; left: 12px; top: 10px; bottom: 44px;
  width: 2px; background: var(--rule);
}
.step { position: relative; padding: 0 0 clamp(40px, 5vw, 56px) 64px; }
.step::before {
  content: ""; position: absolute; left: 0; top: 2px;
  width: 26px; height: 26px; border-radius: 50%;
  border: 2px solid var(--teal); background: var(--paper);
}
.step h3 { font-size: 1.4rem; }
.step p { margin-top: 10px; color: var(--muted); max-width: 54ch; }
.step-last::before { background: var(--stamp); border-color: var(--stamp); }
.step-last p { max-width: 44ch; }
.stamp-step { position: absolute; right: 0; top: -6px; }

/* ---------- Quote (full-width band) ---------- */
.quote {
  background: var(--tint);
  border-block: 1px solid var(--rule);
  padding-block: clamp(64px, 9vw, 110px);
}
.quote blockquote { border-left: 3px solid var(--teal); padding-left: clamp(20px, 4vw, 40px); max-width: 900px; }
.quote blockquote p {
  font: 600 clamp(1.45rem, 2vw + 0.6rem, 2.05rem)/1.35 var(--serif);
  letter-spacing: -0.01em; max-width: 30ch;
}
.quote footer { margin-top: 22px; display: flex; flex-direction: column; gap: 2px; }
.quote-name { font-weight: 600; }
.quote-role { font-size: 0.9rem; color: var(--muted); }

/* ---------- About (single zigzag) ---------- */
.about-grid {
  display: grid; grid-template-columns: 0.85fr 1.15fr;
  gap: clamp(36px, 6vw, 80px); align-items: center;
}
.about-fig { position: relative; }
.about-fig img {
  width: 100%; aspect-ratio: 3 / 4; object-fit: cover;
  border: 1px solid var(--rule);
  box-shadow: -18px 18px 0 var(--frame);
}
.about-copy p { margin-top: 16px; color: var(--muted); max-width: 54ch; }
.about-copy p:first-of-type { margin-top: 20px; }

/* ---------- FAQ (centered column, native disclosure) ---------- */
.faq-wrap { max-width: 760px; }
.faq h2 { margin-bottom: clamp(24px, 4vw, 40px); }
.q { border-top: 1px solid var(--rule); }
.q:last-of-type { border-bottom: 1px solid var(--rule); }
.q summary {
  list-style: none; cursor: pointer;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 18px 0;
  font: 600 1.075rem/1.35 var(--sans); color: var(--navy);
}
.q summary::-webkit-details-marker { display: none; }
.q summary::after {
  content: "+"; font: 400 1.5rem/1 var(--sans); color: var(--teal);
  transition: transform 200ms var(--ease-out);
  flex-shrink: 0;
}
.q[open] summary::after { transform: rotate(45deg); }
.q p { padding: 0 0 20px; color: var(--muted); max-width: 58ch; }

/* ---------- Contact + footer (single navy block) ---------- */
.contact { background: var(--navy); color: var(--paper); padding-block: clamp(72px, 9vw, 112px) 28px; }
.contact h2 { color: var(--paper); }
.contact-sub { margin-top: 14px; color: var(--paper-80); max-width: 44ch; }
.contact .btn-invert { margin-top: 30px; }
.contact .btn-invert { color: var(--navy); }
.contact .btn-invert:hover { color: var(--paper); }
.contact a { color: var(--paper); }

.site-foot { margin-top: clamp(64px, 8vw, 96px); border-top: 1px solid var(--line-soft); padding-top: 40px; }
.foot-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: 32px; }
.foot-brand .brand-name { font-size: 1.15rem; }
.brand-mark-foot { border-color: var(--paper); color: var(--paper); }
.foot-brand .brand-name, .foot-brand .brand-mark { display: inline-flex; vertical-align: middle; }
.foot-brand p { margin-top: 14px; color: var(--paper-60); max-width: 30ch; font-size: 0.95rem; }
.foot-nav { display: flex; flex-direction: column; gap: 10px; }
.foot-nav a, .foot-contact a {
  color: var(--paper-80); text-decoration: none; font-weight: 600; font-size: 0.975rem;
}
.foot-nav a:hover, .foot-contact a:hover { color: var(--paper); text-decoration: underline; text-underline-offset: 5px; }
.foot-contact p { margin-top: 10px; color: var(--paper-60); font-size: 0.9rem; }
.foot-legal { margin-top: 40px; color: var(--paper-60); font-size: 0.85rem; }

/* ============================================================
   MOTION (MOTION_INTENSITY 6)
   1. Hero load cascade - page load
   2. Route tiles + process steps - scroll entry (CSS scroll-driven)
   3. "Filed" stamp press-in - scroll entry
   4. Hero stamp press - pointer hover
   5. Link / button / summary micro-transitions - pointer + focus
   ============================================================ */
@media (prefers-reduced-motion: no-preference) {
  .hero-copy > * , .hero-fig {
    animation: rise 700ms var(--ease-out) both;
  }
  .hero-copy .hero-sub { animation-delay: 90ms; }
  .hero-copy .hero-cta { animation-delay: 180ms; }
  .hero-fig { animation-delay: 140ms; }

  .q summary::after { transition: transform 200ms var(--ease-out); }
  .stamp-hero { transition: transform 220ms var(--ease-spring); }
}
@keyframes rise {
  from { opacity: 0; transform: translateY(18px); }
}

/* Scroll-driven reveals: progressive enhancement only. */
@supports (animation-timeline: view()) {
  @media (prefers-reduced-motion: no-preference) {
    .tile, .step {
      animation: step-in 1ms var(--ease-out) both;
      animation-timeline: view();
      animation-range: entry 0% entry 34%;
    }
    .stamp-step {
      animation: stamp-in 1ms var(--ease-spring) both;
      animation-timeline: view();
      animation-range: entry 20% entry 80%;
    }
  }
}
@keyframes step-in {
  from { opacity: 0; transform: translateY(26px); }
}
@keyframes stamp-in {
  from { opacity: 0; transform: rotate(-16deg) scale(1.7); }
  to { opacity: 0.95; transform: rotate(-8deg) scale(1); }
}

/* ---------- Reduced motion: everything static, content visible ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}

/* ---------- Breakpoints ---------- */
@media (max-width: 1099px) {
  .brand-sub { display: none; }
}

@media (max-width: 1023px) {
  .hero-grid { grid-template-columns: 1fr; align-items: start; }
  .hero h1 { max-width: 16ch; }
  .hero-fig { max-width: 640px; }
  .routes-grid { grid-template-columns: 1fr; grid-template-rows: none; }
  .tile-work { grid-column: auto; flex-direction: column; align-items: flex-start; }
  .tile-work p { flex: none; }
  .tile-work .tile-fact { border-left: 0; border-top: 1px solid var(--line-soft); padding: 16px 0 0; white-space: normal; }
  .about-grid { grid-template-columns: 1fr; }
  .about-fig { max-width: 520px; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 759px) {
  body { font-size: 1rem; }
  .site-nav { display: none; }
  .menu { display: block; margin-left: auto; }
  .head-row { gap: 16px; }
  .hero { padding-block: 32px 64px; }
  .hero-cta .btn { flex: 1 1 auto; }
  .stamp-hero { top: -18px; right: -8px; padding: 8px 12px 10px; }
  .tile { padding: 26px; }
  .tile-family img { margin: -26px -26px 18px; width: calc(100% + 52px); }
  .step { padding-left: 48px; }
  .steps::before { left: 10px; }
  .stamp-step { position: static; display: inline-flex; margin-top: 18px; transform: rotate(-6deg); }
  .foot-grid { grid-template-columns: 1fr; gap: 28px; }
  .about-fig img { box-shadow: 12px 12px 0 var(--frame); }
  .hero-fig img { box-shadow: 12px 12px 0 var(--frame); }
}