@import url("fonts.css");

/* ---------- Tokens ---------- */
:root {
  --ink: #14213d;
  --ink-2: #1c2c4d;
  --paper: #e7ebec;
  --paper-2: #dbe1e2;
  --line: #1b6e6e;
  --line-soft: rgba(27, 110, 110, 0.35);
  --signal: #d9772e;
  --signal-dark: #b85f1d;
  --graphite: #565b66;
  --white: #ffffff;

  --ink-text-muted: #c4cbd9;
  --ink-label-muted: #9db0c7;
  --ink-faint: #7784a0;

  --font-display: "Big Shoulders Display", "Arial Narrow", sans-serif;
  --font-body: "IBM Plex Sans", "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "Consolas", monospace;

  --wrap: 1180px;
  --gutter: clamp(1.25rem, 4vw, 3rem);
  --radius: 4px;
}

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

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
}

h1,
h2,
h3 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 0.96;
  letter-spacing: 0.005em;
  margin: 0;
  text-wrap: balance;
}

p {
  margin: 0;
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 3px;
}

.wrap {
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--signal);
  color: var(--white);
  padding: 0.75rem 1.25rem;
  z-index: 100;
  font-family: var(--font-mono);
  text-decoration: none;
}

.skip-link:focus {
  left: var(--gutter);
  top: 0.75rem;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--line);
  margin: 0 0 0.9rem;
}

.eyebrow--on-ink {
  color: #7fbcbc;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.03em;
  text-decoration: none;
  padding: 0.85rem 1.5rem;
  border: 1px solid currentColor;
  border-radius: var(--radius);
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.btn.pill {
  border-radius: 999px;
  padding-inline: 1.75rem;
}

.btn-signal {
  background: var(--signal);
  border-color: var(--signal);
  color: var(--white);
}

.btn-signal:hover {
  background: var(--signal-dark);
  border-color: var(--signal-dark);
}

.btn-ghost {
  background: transparent;
  color: inherit;
}

.btn-ghost:hover {
  border-color: var(--signal);
  color: var(--signal);
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(231, 235, 236, 0.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--paper-2);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.25rem;
}

.wordmark {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: 0.06em;
  text-decoration: none;
  color: var(--ink);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.site-nav a {
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--graphite);
}

.site-nav a:hover {
  color: var(--line);
}

.nav-toggle {
  display: none;
}

@media (max-width: 720px) {
  .site-nav {
    position: fixed;
    inset: 4.25rem 0 auto 0;
    background: var(--paper);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 0.5rem var(--gutter) 1.5rem;
    border-bottom: 1px solid var(--paper-2);
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.18s ease, opacity 0.18s ease;
  }

  .site-nav[data-open="true"] {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .site-nav a {
    padding: 0.75rem 0;
    width: 100%;
    border-bottom: 1px solid var(--paper-2);
  }

  .nav-toggle {
    display: inline-flex;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    padding: 0.5rem;
    cursor: pointer;
  }

  .nav-toggle span {
    width: 22px;
    height: 2px;
    background: var(--ink);
    transition: transform 0.18s ease, opacity 0.18s ease;
  }

  .nav-toggle[aria-expanded="true"] span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
  }

  .nav-toggle[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle[aria-expanded="true"] span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
  }
}

/* ---------- Corner marks (blueprint motif) ---------- */
.regmarks {
  position: relative;
}

.regmarks::before,
.regmarks::after {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  border-top: 1px solid var(--line-soft);
  border-left: 1px solid var(--line-soft);
  top: 1.25rem;
}

.regmarks::before {
  left: var(--gutter);
}

.regmarks::after {
  right: var(--gutter);
  border-left: none;
  border-right: 1px solid var(--line-soft);
}

.regmarks--on-ink::before,
.regmarks--on-ink::after {
  border-color: rgba(255, 255, 255, 0.18);
}

/* ---------- Hero ---------- */
.hero {
  background: var(--ink);
  color: var(--white);
  padding-block: clamp(5rem, 12vw, 8rem) clamp(4rem, 8vw, 6rem);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(2rem, 6vw, 5rem);
  align-items: center;
}

.hero h1 {
  font-size: clamp(2.6rem, 5.4vw, 4.4rem);
  color: var(--white);
}

.hero .lede {
  font-size: 1.05rem;
  color: var(--ink-text-muted);
  max-width: 42ch;
  margin-top: 1.5rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2.25rem;
}

.hero .btn-ghost {
  color: var(--ink-text-muted);
}

@media (max-width: 860px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
}

/* ---------- Chain diagram ---------- */
.chain {
  --dot: 0.65rem;
  position: relative;
  display: flex;
  justify-content: space-between;
}

.chain::before {
  content: "";
  position: absolute;
  left: calc(var(--dot) / 2);
  right: calc(var(--dot) / 2);
  top: calc(var(--dot) / 2);
  height: 1px;
  background: var(--line-soft);
}

.chain--on-ink::before {
  background: rgba(255, 255, 255, 0.22);
}

.chain-node {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.65rem;
  flex: 1;
  text-align: center;
}

.chain-node .dot {
  width: var(--dot);
  height: var(--dot);
  border-radius: 50%;
  background: var(--line);
  box-shadow: 0 0 0 4px var(--ink);
}

.chain--on-light .chain-node .dot {
  box-shadow: 0 0 0 4px var(--paper);
}

.chain-node .label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-label-muted);
}

.chain--on-light .chain-node .label {
  color: var(--graphite);
}

@media (max-width: 860px) {
  .chain {
    flex-direction: column;
    align-items: flex-start;
    gap: 1.5rem;
  }

  .chain::before {
    left: calc(var(--dot) / 2);
    top: calc(var(--dot) / 2);
    bottom: calc(var(--dot) / 2);
    right: auto;
    width: 1px;
    height: auto;
  }

  .chain-node {
    flex-direction: row;
    text-align: left;
  }
}

/* ---------- Title block strip ---------- */
.titleblock {
  background: var(--ink-2);
  color: var(--white);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.titleblock-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  padding-block: 1.5rem;
}

.titleblock-grid > div {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding-inline: 1rem;
  border-left: 1px solid rgba(255, 255, 255, 0.12);
}

.titleblock-grid > div:first-child {
  border-left: none;
  padding-left: 0;
}

.tb-label {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-label-muted);
}

.tb-value {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--white);
}

@media (max-width: 720px) {
  .titleblock-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
  }

  .titleblock-grid > div {
    border-left: none;
    padding-left: 0;
  }
}

/* ---------- Sections (generic rhythm) ---------- */
.section {
  padding-block: clamp(4rem, 9vw, 6.5rem);
}

.section h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  color: var(--ink);
  max-width: 20ch;
}

.section-intro {
  max-width: 60ch;
  margin-top: 1.25rem;
  color: var(--graphite);
  font-size: 1.05rem;
}

/* ---------- Process (five stages) ---------- */
.process {
  border-top: 1px solid var(--paper-2);
  border-bottom: 1px solid var(--paper-2);
}

.process-diagram {
  margin-block: 2.5rem 3rem;
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1.5rem;
}

.process-grid li {
  border-top: 2px solid var(--line);
  padding-top: 1rem;
}

.step {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--line);
  margin-bottom: 0.6rem;
}

.process-grid h3 {
  font-size: 1.35rem;
  margin-bottom: 0.6rem;
}

.process-grid p {
  color: var(--graphite);
  font-size: 0.92rem;
}

@media (max-width: 980px) {
  .process-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 560px) {
  .process-grid {
    grid-template-columns: 1fr;
  }
}

/* ---------- Product / PhysAI ---------- */
.product-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 6vw, 4rem);
  align-items: start;
}

.feature-list {
  margin-top: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.feature-list li {
  padding-left: 1.4rem;
  position: relative;
  color: var(--ink);
}

.feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 0.55rem;
  height: 1px;
  background: var(--line);
}

.feature-list strong {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.02em;
}

@media (max-width: 860px) {
  .product-grid {
    grid-template-columns: 1fr;
  }
}

/* ---------- Blueprint frame (schematic mockup) ---------- */
.blueprint-frame {
  margin: 0;
  border: 1px solid var(--line-soft);
  background: var(--white);
  padding: 1.5rem;
  position: relative;
}

.blueprint-frame__corner {
  position: absolute;
  width: 10px;
  height: 10px;
  border: 1px solid var(--line);
}

.blueprint-frame__corner--tl {
  top: -1px;
  left: -1px;
  border-right: none;
  border-bottom: none;
}

.blueprint-frame__corner--br {
  bottom: -1px;
  right: -1px;
  border-left: none;
  border-top: none;
}

.schematic-calendar {
  display: flex;
  flex-direction: column;
}

.schematic-row {
  display: grid;
  grid-template-columns: 3.5rem 1fr;
  align-items: stretch;
  border-top: 1px solid var(--paper-2);
  min-height: 2.6rem;
}

.schematic-row:first-child {
  border-top: none;
}

.schematic-time {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--graphite);
  padding-top: 0.35rem;
}

.schematic-slot {
  display: flex;
  align-items: center;
}

.schematic-slot span {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.02em;
  padding: 0.45rem 0.7rem;
  border-radius: 2px;
}

.schematic-slot--filled span {
  background: rgba(27, 110, 110, 0.12);
  border-left: 2px solid var(--line);
  color: var(--ink);
}

.schematic-slot--filled.schematic-slot--product span {
  background: rgba(53, 95, 121, 0.12);
  border-left: 2px solid #355f79;
}

.schematic-slot--free span {
  color: var(--graphite);
  opacity: 0.55;
  border-left: 2px dashed var(--paper-2);
}

.blueprint-frame figcaption {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--graphite);
  margin-top: 1.1rem;
  padding-top: 1rem;
  border-top: 1px dashed var(--paper-2);
}

/* ---------- Future programs ---------- */
.future-card {
  margin-top: 2.25rem;
  border: 1px dashed var(--line-soft);
  padding: 1.5rem 1.75rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 2rem;
  align-items: baseline;
  max-width: 32rem;
}

.future-card .tb-label {
  color: var(--line);
}

.future-card .tb-value {
  color: var(--ink);
}

/* ---------- Footer / contact ---------- */
.site-footer {
  background: var(--ink);
  color: var(--white);
  padding-block: clamp(3.5rem, 8vw, 5.5rem) 2.5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.footer-grid h2 {
  color: var(--white);
  font-size: clamp(1.8rem, 3.6vw, 2.6rem);
  max-width: 16ch;
}

.footer-grid .btn {
  margin-top: 1.75rem;
}

.footer-meta {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink-label-muted);
}

.footer-meta nav {
  display: flex;
  gap: 1.5rem;
}

.footer-meta nav a {
  text-decoration: none;
  color: var(--ink-text-muted);
}

.footer-meta nav a:hover {
  color: var(--white);
}

.footer-bottom {
  padding-top: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-faint);
}

@media (max-width: 860px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}