/* ============================================================
   SSDF Inc. / AMAIMA Inc. — Public Capability Site
   Design tokens
   ============================================================ */

:root {
  /* Color */
  --void: #0B0F17;
  --void-2: #0E1420;
  --panel: #131A26;
  --panel-2: #17202E;
  --border: #232E3F;
  --border-soft: #1A2230;
  --cipher: #5EEAD4;
  --cipher-dim: #2C7A70;
  --seal: #C9A54D;
  --seal-dim: #7A6531;
  --vellum: #E8EAEF;
  --mist: #8B93A3;
  --mist-dim: #5C6577;

  /* Type */
  --font-display: 'Space Grotesk', 'Segoe UI', sans-serif;
  --font-body: 'IBM Plex Sans', 'Segoe UI', sans-serif;
  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;

  /* Golden-ratio derived scale (base 1rem, ratio 1.618) */
  --phi: 1.618;
  --space-1: 0.382rem;
  --space-2: 0.618rem;
  --space-3: 1rem;
  --space-4: 1.618rem;
  --space-5: 2.618rem;
  --space-6: 4.236rem;
  --space-7: 6.854rem;

  --radius: 3px;
  --max-w: 1180px;
}

/* ============================================================
   Reset / base
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}

body {
  margin: 0;
  background: var(--void);
  color: var(--vellum);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 600; margin: 0; color: var(--vellum); }
p { margin: 0; }
a { color: inherit; text-decoration: none; }
ul { margin: 0; padding: 0; list-style: none; }
dl, dd { margin: 0; }
img, svg { display: block; max-width: 100%; }

.wrap {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--cipher); color: var(--void);
  padding: var(--space-2) var(--space-3); z-index: 200;
}
.skip-link:focus { left: var(--space-3); top: var(--space-3); }

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

/* ============================================================
   Signature element — lattice veil (golden-ratio node field)
   ============================================================ */

.lattice-veil {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.5;
  background-image:
    radial-gradient(circle at 1px 1px, rgba(94,234,212,0.16) 1px, transparent 1px);
  background-size: 34px 55px; /* 34/55 ≈ 1/1.618 */
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 0%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 0%, transparent 75%);
}

/* ============================================================
   Header
   ============================================================ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 15, 23, 0.86);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-soft);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--vellum);
}
.brand-mark { color: var(--cipher); display: flex; }
.brand-word {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: 0.02em;
  font-size: 1.05rem;
}
.brand-sep { color: var(--mist-dim); margin: 0 0.1em; }

.primary-nav {
  display: flex;
  gap: var(--space-5);
}
.primary-nav a {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  color: var(--mist);
  text-transform: uppercase;
  transition: color 0.15s ease;
  position: relative;
  padding-bottom: 2px;
}
.primary-nav a:hover { color: var(--cipher); }

.header-cta { display: flex; align-items: center; gap: var(--space-3); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 0;
  padding: 8px;
  cursor: pointer;
}
.nav-toggle span { width: 20px; height: 2px; background: var(--vellum); display: block; }

.mobile-nav {
  display: none;
  flex-direction: column;
  padding: var(--space-3) var(--space-4) var(--space-4);
  border-top: 1px solid var(--border-soft);
}
.mobile-nav a {
  padding: var(--space-3) 0;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--mist);
  border-bottom: 1px solid var(--border-soft);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.mobile-nav.open { display: flex; }

/* ============================================================
   Buttons
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  padding: 0.72em 1.35em;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.03em;
  border-radius: var(--radius);
  border: 1px solid transparent;
  transition: all 0.18s ease;
  white-space: nowrap;
}
.btn-primary { background: var(--cipher); color: var(--void); font-weight: 600; }
.btn-primary:hover { background: #7EF3E1; transform: translateY(-1px); }
.btn-outline { border-color: var(--border); color: var(--vellum); }
.btn-outline:hover { border-color: var(--cipher); color: var(--cipher); }
.btn-ghost { color: var(--mist); font-size: 0.78rem; }
.btn-ghost:hover { color: var(--cipher); }

/* ============================================================
   Hero
   ============================================================ */

.hero {
  position: relative;
  z-index: 1;
  padding: var(--space-7) 0 var(--space-6);
  border-bottom: 1px solid var(--border-soft);
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cipher);
  margin-bottom: var(--space-3);
}

.hero-headline {
  font-size: clamp(2.2rem, 5.2vw, 3.6rem);
  line-height: 1.08;
  letter-spacing: -0.01em;
  max-width: 16ch;
  margin-bottom: var(--space-4);
}
.hero-headline-accent { color: var(--mist); font-weight: 500; }

.hero-sub {
  max-width: 62ch;
  font-size: 1.08rem;
  color: var(--mist);
  margin-bottom: var(--space-5);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.hero-facts {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
  padding-top: var(--space-5);
  border-top: 1px solid var(--border-soft);
}
.hero-facts dt {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--mist-dim);
  margin-bottom: 0.35em;
}
.hero-facts dd { font-size: 0.92rem; color: var(--vellum); }

/* ============================================================
   Sections — general
   ============================================================ */

.section {
  position: relative;
  z-index: 1;
  padding: var(--space-6) 0;
  border-bottom: 1px solid var(--border-soft);
}
.alt-bg { background: var(--void-2); }

.section-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--seal);
  margin-bottom: var(--space-2);
}
.section-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  max-width: 22ch;
  margin-bottom: var(--space-4);
}
.section-lede {
  max-width: 62ch;
  color: var(--mist);
  font-size: 1.02rem;
  margin-bottom: var(--space-5);
}

/* Glance strip */
.glance { padding: var(--space-5) 0; background: var(--panel); border-bottom: 1px solid var(--border-soft); }
.glance-inner p { max-width: 78ch; color: var(--mist); font-size: 0.98rem; }
.glance-inner strong { color: var(--vellum); }

/* ============================================================
   Capability cards
   ============================================================ */

.cap-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border-soft);
  border: 1px solid var(--border-soft);
}
.cap-card {
  background: var(--panel);
  padding: var(--space-4);
}
.cap-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--cipher);
  letter-spacing: 0.08em;
  border: 1px solid var(--cipher-dim);
  display: inline-block;
  padding: 0.15em 0.6em;
  border-radius: 2px;
  margin-bottom: var(--space-3);
}
.cap-card h3 { font-size: 1.08rem; margin-bottom: var(--space-3); }
.cap-card ul { display: flex; flex-direction: column; gap: 0.65em; }
.cap-card li {
  font-size: 0.88rem;
  color: var(--mist);
  padding-left: 1em;
  position: relative;
  line-height: 1.55;
}
.cap-card li::before {
  content: '';
  position: absolute;
  left: 0; top: 0.55em;
  width: 4px; height: 4px;
  background: var(--cipher-dim);
}

/* ============================================================
   Differentiators list
   ============================================================ */

.diff-section { background: var(--panel); }
.diff-list { display: flex; flex-direction: column; }
.diff-list li {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-4) 0;
  border-top: 1px solid var(--border-soft);
}
.diff-list li:last-child { border-bottom: 1px solid var(--border-soft); }
.diff-mark {
  flex-shrink: 0;
  width: 32px; height: 32px;
  border: 1px solid var(--seal-dim);
  color: var(--seal);
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  font-size: 0.85rem;
}
.diff-list h4 { font-size: 1rem; margin-bottom: 0.35em; }
.diff-list p { color: var(--mist); font-size: 0.92rem; max-width: 60ch; }

/* ============================================================
   Patent portfolio
   ============================================================ */

.portfolio-panel {
  display: grid;
  grid-template-columns: 0.9fr 1.4fr;
  gap: var(--space-6);
  align-items: center;
  border: 1px solid var(--border);
  padding: var(--space-5);
  background: linear-gradient(135deg, rgba(94,234,212,0.05), transparent 60%);
}
.portfolio-figure { display: flex; flex-direction: column; border-right: 1px solid var(--border-soft); padding-right: var(--space-5); }
.portfolio-number {
  font-family: var(--font-display);
  font-size: clamp(3.5rem, 8vw, 5.5rem);
  font-weight: 700;
  color: var(--cipher);
  line-height: 1;
}
.portfolio-label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--mist);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-top: var(--space-2);
}
.portfolio-copy { color: var(--mist); font-size: 0.96rem; max-width: 56ch; }

/* ============================================================
   Engagement model cards
   ============================================================ */

.model-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
}
.model-card {
  border: 1px solid var(--border);
  padding: var(--space-4);
  background: var(--panel);
}
.model-card h4 { font-size: 0.98rem; margin-bottom: var(--space-2); color: var(--seal); }
.model-card p { font-size: 0.88rem; color: var(--mist); }

/* ============================================================
   Domain rows
   ============================================================ */

.domain-list { display: flex; flex-direction: column; }
.domain-row {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: var(--space-4);
  padding: var(--space-4) 0;
  border-top: 1px solid var(--border-soft);
}
.domain-row:last-child { border-bottom: 1px solid var(--border-soft); }
.domain-row h4 { font-size: 1rem; color: var(--vellum); }
.domain-row p { color: var(--mist); font-size: 0.92rem; }

/* ============================================================
   Readiness
   ============================================================ */

.readiness-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
  margin-top: var(--space-5);
}
.evidence-list { display: flex; flex-direction: column; gap: var(--space-3); }
.evidence-list li {
  font-size: 0.92rem;
  color: var(--mist);
  padding-left: var(--space-4);
  position: relative;
  line-height: 1.55;
}
.evidence-list li::before {
  content: '◆';
  position: absolute;
  left: 0;
  color: var(--cipher);
  font-size: 0.6rem;
  top: 0.4em;
}
.evidence-list a { color: var(--cipher); }
.evidence-list a:hover { text-decoration: underline; }
.readiness-columns { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); }
.readiness-heading {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--seal);
  margin-bottom: var(--space-3);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--border-soft);
}
.readiness-columns ul { display: flex; flex-direction: column; gap: 0.6em; }
.readiness-columns li { font-size: 0.85rem; color: var(--mist); line-height: 1.5; }
.readiness-note {
  margin-top: var(--space-5);
  padding-top: var(--space-4);
  border-top: 1px solid var(--border-soft);
  color: var(--mist-dim);
  font-size: 0.85rem;
  font-style: italic;
  max-width: 72ch;
}

/* ============================================================
   Structure table
   ============================================================ */

.structure-inner { max-width: 900px; }
.structure-table { display: flex; flex-direction: column; }
.structure-table > div {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: var(--space-4);
  padding: var(--space-3) 0;
  border-top: 1px solid var(--border-soft);
}
.structure-table > div:last-child { border-bottom: 1px solid var(--border-soft); }
.structure-table dt {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--seal);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.structure-table dd { font-size: 0.92rem; color: var(--mist); }

/* ============================================================
   Posture
   ============================================================ */

.posture-inner { max-width: 760px; }
.posture-inner .section-title { margin-bottom: var(--space-4); }
.posture-inner p { color: var(--mist); font-size: 1rem; margin-bottom: var(--space-3); }
.posture-inner p:last-child { margin-bottom: 0; }

/* ============================================================
   Contact
   ============================================================ */

.contact-section { border-bottom: none; }
.contact-inner { max-width: 900px; }
.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--border-soft);
  border: 1px solid var(--border-soft);
  margin-top: var(--space-5);
}
.contact-card { background: var(--panel); padding: var(--space-4); }
.contact-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--mist-dim);
  margin-bottom: var(--space-2);
}
.contact-value { font-size: 1.02rem; }
.contact-value a { color: var(--cipher); }
.contact-value a:hover { text-decoration: underline; }
.contact-muted { color: var(--mist); font-size: 0.88rem; font-weight: 400; }
.contact-note {
  margin-top: var(--space-5);
  color: var(--mist-dim);
  font-size: 0.85rem;
  max-width: 70ch;
}

/* Source / product grid */
#source { scroll-margin-top: 88px; }

.source-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--border-soft);
  border: 1px solid var(--border-soft);
}

.source-card {
  background: var(--panel);
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  min-height: 100%;
}

.source-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.source-card h3 { font-size: 1.15rem; }

.source-card p {
  color: var(--mist);
  font-size: 0.9rem;
  line-height: 1.55;
  flex: 1;
}

.source-links {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  padding-top: var(--space-2);
  border-top: 1px solid var(--border-soft);
}

.source-row {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: var(--space-2);
  align-items: start;
}

.source-row-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--mist-dim);
  padding-top: 0.2em;
}

.source-row a {
  color: var(--cipher);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  word-break: break-all;
}
.source-row a:hover { text-decoration: underline; }

.source-placeholder {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--mist-dim);
  font-style: italic;
}

.source-badge {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--seal);
  border: 1px solid var(--seal-dim);
  padding: 0.2em 0.55em;
  border-radius: 2px;
  white-space: nowrap;
}

.source-note {
  display: block;
  font-family: var(--font-body);
  font-style: italic;
  font-size: 0.75rem;
  color: var(--mist-dim);
  margin-top: 0.2em;
}

/* ============================================================
   Footer
   ============================================================ */

.site-footer {
  position: relative;
  z-index: 1;
  padding: var(--space-5) 0 var(--space-6);
}
.footer-legal {
  font-size: 0.78rem;
  color: var(--mist-dim);
  max-width: 90ch;
  line-height: 1.6;
  margin-bottom: var(--space-3);
}
.footer-copy {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--mist-dim);
}

/* ============================================================
   Reveal-on-scroll
   ============================================================ */

.reveal {
  opacity: 1;
  transform: none;
}
html.js .reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
html.js .reveal.in { opacity: 1; transform: translateY(0); }

/* ============================================================
   Responsive
   ============================================================ */

@media (max-width: 900px) {
  .primary-nav { display: none; }
  .nav-toggle { display: flex; }
  .cap-grid { grid-template-columns: 1fr; }
  .model-grid { grid-template-columns: 1fr; }
  .source-grid { grid-template-columns: 1fr; }
  .portfolio-panel { grid-template-columns: 1fr; }
  .portfolio-figure { border-right: none; padding-right: 0; border-bottom: 1px solid var(--border-soft); padding-bottom: var(--space-4); }
  .readiness-grid { grid-template-columns: 1fr; gap: var(--space-5); }
  .readiness-columns { grid-template-columns: 1fr; gap: var(--space-4); }
  .domain-row { grid-template-columns: 1fr; gap: var(--space-2); }
  .structure-table > div { grid-template-columns: 1fr; gap: var(--space-1); }
  .contact-grid { grid-template-columns: 1fr; }
  .hero-facts { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 560px) {
  .wrap { padding: 0 var(--space-3); }
  .hero { padding: var(--space-6) 0 var(--space-5); }
  .header-cta .btn-ghost { display: none; }
}