/* ============================================================
   Rta Phi Foundation — Core Styles
   Palette: midnight indigo + Egyptian gold + parchment cream
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,400;9..144,500;9..144,600;9..144,700&family=JetBrains+Mono:wght@400;500;600&family=Inter+Tight:wght@400;500;600;700&family=Noto+Sans+Devanagari:wght@400;500;600&display=swap');

:root {
  /* Core palette */
  --ink: #0e1330;            /* midnight indigo, primary text on light */
  --ink-soft: #2a2f55;
  --ink-mute: #5a6087;
  --paper: #f5efe4;          /* parchment cream */
  --paper-warm: #efe6d3;
  --paper-deep: #e6dbc1;
  --rule: #d9cfb6;

  /* Accent */
  --gold: #C5A028;
  --gold-deep: #9B7F1F;
  --gold-glow: #D9B84A;
  --crimson: #8b1a1a;        /* secondary accent for emphasis */

  /* Dark surfaces (used in hero, footers) */
  --night: #0a0e22;
  --night-2: #141a3a;
  --night-rule: #2a315a;

  /* Type scale */
  --display: 'Fraunces', 'Noto Sans Devanagari', 'Iowan Old Style', Georgia, serif;
  --body: 'Inter Tight', 'Noto Sans Devanagari', -apple-system, BlinkMacSystemFont, sans-serif;
  --mono: 'JetBrains Mono', 'Noto Sans Devanagari', ui-monospace, 'SF Mono', monospace;

  /* Layout */
  --container: 1240px;
  --container-narrow: 880px;
  --radius: 2px;
  --radius-lg: 4px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--body);
  font-size: 16.5px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* ----- Typography ----- */
h1, h2, h3, h4 {
  font-family: var(--display);
  font-weight: 500;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--ink);
}

h1 { font-size: clamp(2.4rem, 5.5vw, 4.4rem); font-weight: 400; letter-spacing: -0.03em; }
h2 { font-size: clamp(1.8rem, 3.2vw, 2.6rem); }
h3 { font-size: 1.35rem; font-weight: 600; }
h4 { font-size: 1.05rem; font-weight: 600; letter-spacing: 0; }

p { max-width: 68ch; }

a {
  color: var(--gold-deep);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .2s, color .2s;
}
a:hover { border-bottom-color: var(--gold); }

code, .mono { font-family: var(--mono); font-size: 0.92em; }

/* Eyebrow/label text */
.eyebrow {
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold-deep);
  display: inline-block;
}
.eyebrow::before { content: '— '; }

/* ----- Layout ----- */
.container { max-width: var(--container); margin: 0 auto; padding: 0 2rem; }
.container-narrow { max-width: var(--container-narrow); margin: 0 auto; padding: 0 2rem; }

section { padding: 5.5rem 0; }
section.tight { padding: 3.5rem 0; }

/* Horizontal rule, archival style */
.rule {
  border: none;
  border-top: 1px solid var(--rule);
  margin: 0;
}
.rule-double {
  border: none;
  border-top: 3px double var(--rule);
}

/* ============================================================
   HEADER / NAV
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(245, 239, 228, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--rule);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem 2rem;
  max-width: var(--container);
  margin: 0 auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  border: none;
  color: var(--ink);
}
.brand:hover { border: none; }

.brand-mark {
  width: 36px;
  height: 36px;
  border: 1.5px solid var(--ink);
  display: grid;
  place-items: center;
  font-family: var(--display);
  font-size: 1.25rem;
  font-weight: 500;
  font-style: italic;
  background: var(--paper);
  flex-shrink: 0;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1;
}
.brand-name {
  font-family: var(--display);
  font-size: 1.18rem;
  font-weight: 500;
  letter-spacing: -0.01em;
}
.brand-tag {
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-top: 3px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}
.nav-links a {
  color: var(--ink-soft);
  font-size: 0.93rem;
  font-weight: 500;
  border: none;
  position: relative;
}
.nav-links a:hover { color: var(--gold-deep); border: none; }
.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gold);
}

.nav-cta {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.55rem 1rem;
  border: 1.5px solid var(--ink);
  color: var(--ink);
  background: transparent;
  transition: background .2s, color .2s;
}
.nav-cta:hover {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--ink);
  padding: 0.5rem 0.7rem;
  cursor: pointer;
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--ink);
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  background: var(--night);
  color: var(--paper);
  padding: 7rem 0 6rem;
  overflow: hidden;
}

.hero::before {
  /* Subtle grid texture */
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--night-rule) 1px, transparent 1px),
    linear-gradient(90deg, var(--night-rule) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.25;
  mask-image: radial-gradient(ellipse at 70% 50%, black 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at 70% 50%, black 20%, transparent 75%);
}

.hero::after {
  /* Saffron radial glow */
  content: '';
  position: absolute;
  top: -10%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(217, 119, 6, 0.18) 0%, transparent 65%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 4rem;
  align-items: end;
}

.hero h1 {
  color: var(--paper);
  font-weight: 400;
  font-size: clamp(2.6rem, 6.2vw, 5rem);
  letter-spacing: -0.035em;
}
.hero h1 em {
  font-style: italic;
  color: var(--gold-glow);
  font-weight: 400;
}

.hero-eyebrow {
  color: var(--gold-glow);
  margin-bottom: 1.8rem;
}

.hero-lede {
  font-family: var(--display);
  font-size: 1.3rem;
  font-weight: 400;
  line-height: 1.5;
  color: var(--paper-warm);
  max-width: 36ch;
  margin-top: 2rem;
}

.hero-meta {
  border-left: 1px solid var(--night-rule);
  padding-left: 2rem;
  padding-bottom: 0.5rem;
}
.hero-meta dl {
  display: grid;
  gap: 1.25rem;
}
.hero-meta dt {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: 0.3rem;
}
.hero-meta dd {
  font-family: var(--display);
  font-size: 1.05rem;
  color: var(--paper);
  font-weight: 400;
}
.hero-meta dd .accent { color: var(--gold-glow); font-style: italic; }

.hero-actions {
  display: flex;
  gap: 1rem;
  margin-top: 2.5rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--mono);
  font-size: 0.82rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.85rem 1.4rem;
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: all .2s;
  border-radius: 0;
  background: none;
  text-decoration: none;
}
.btn:hover { border-bottom-color: transparent; }

.btn-primary {
  background: var(--gold);
  color: var(--night);
  border-color: var(--gold);
}
.btn-primary:hover {
  background: var(--gold-glow);
  border-color: var(--gold-glow);
}

.btn-ghost {
  background: transparent;
  color: var(--paper);
  border-color: var(--paper-warm);
}
.btn-ghost:hover {
  background: var(--paper);
  color: var(--night);
}

.btn-dark {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}
.btn-dark:hover {
  background: var(--gold-deep);
  border-color: var(--gold-deep);
}

.btn-outline {
  background: transparent;
  color: var(--ink);
  border-color: var(--ink);
}
.btn-outline:hover {
  background: var(--ink);
  color: var(--paper);
}

.btn .arrow { transition: transform .2s; }
.btn:hover .arrow { transform: translateX(3px); }

/* ============================================================
   SECTIONS — General
   ============================================================ */
.section-header {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 3rem;
  margin-bottom: 3.5rem;
  align-items: end;
}
.section-header .label-col .eyebrow { margin-bottom: 0.8rem; }
.section-header h2 { margin-bottom: 0.8rem; }
.section-header .intro {
  font-family: var(--display);
  font-size: 1.15rem;
  font-weight: 400;
  line-height: 1.5;
  color: var(--ink-soft);
  max-width: 56ch;
}

/* ============================================================
   MISSION strip
   ============================================================ */
.mission {
  background: var(--paper-warm);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  padding: 4rem 0;
}
.mission-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
}
.mission-item {
  padding: 0 2.5rem;
  border-left: 1px solid var(--rule);
}
.mission-item:first-child { border-left: none; padding-left: 0; }
.mission-item:last-child { padding-right: 0; }
.mission-num {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--gold-deep);
  margin-bottom: 1rem;
}
.mission-item h3 {
  font-family: var(--display);
  font-size: 1.4rem;
  font-weight: 500;
  margin-bottom: 0.6rem;
}
.mission-item p {
  font-size: 0.97rem;
  color: var(--ink-soft);
}

/* ============================================================
   PORTFOLIO / PROJECT CATALOG
   ============================================================ */
.portfolio {
  background: var(--paper);
}

.category-block {
  border-top: 1px solid var(--rule);
  padding: 3rem 0;
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 3rem;
}
.category-block:last-child { border-bottom: 1px solid var(--rule); }

/* ============================================================
   DESIGN LIST (methods → designs grid, light variant)
   ============================================================ */
.design-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: 1fr;
  border-top: 1px solid var(--rule);
}
@media (min-width: 720px) {
  .design-list { grid-template-columns: 1fr 1fr; }
}
.design-item {
  padding: 2.2rem 1.8rem;
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  display: flex;
  flex-direction: column;
}
.design-item:last-child { border-right: 1px solid var(--rule); }
@media (min-width: 720px) {
  .design-item:nth-child(2n) { border-right: none; }
}
.design-num {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gold-glow);
  margin-bottom: 1rem;
}
.design-item h3 {
  font-family: var(--display);
  font-size: 1.22rem;
  font-weight: 500;
  margin: 0 0 0.8rem;
  letter-spacing: -0.005em;
}
.design-item p {
  font-size: 0.95rem;
  line-height: 1.6;
  margin: 0 0 1.2rem;
  flex: 1;
}
.design-deps {
  font-family: var(--mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-mute);
  padding-top: 0.9rem;
  border-top: 1px dashed var(--rule);
}

/* Light variant — paper-tone background */
.design-list--light .design-num { color: var(--gold-deep); }
.design-list--light .design-item h3 { color: var(--ink); }
.design-list--light .design-item p { color: var(--ink-soft); }
.design-list--light .design-item:hover { background: var(--paper-warm); }

.category-meta { position: sticky; top: 6rem; align-self: start; }
.category-meta .cat-num {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--gold-deep);
  margin-bottom: 0.6rem;
}
.category-meta h3 {
  font-family: var(--display);
  font-size: 1.6rem;
  font-weight: 500;
  margin-bottom: 0.8rem;
}
.category-meta .cat-desc {
  font-size: 0.93rem;
  color: var(--ink-mute);
  line-height: 1.55;
}

.project-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.project-card {
  background: var(--paper-warm);
  border: 1px solid var(--rule);
  padding: 1.5rem;
  transition: transform .25s, border-color .25s, background .25s;
  text-decoration: none;
  color: var(--ink);
  border-bottom: 1px solid var(--rule);
  position: relative;
}
.project-card:hover {
  border-color: var(--ink);
  border-bottom-color: var(--ink);
  background: var(--paper);
  transform: translateY(-2px);
}

.project-card .pc-id {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  color: var(--ink-mute);
  margin-bottom: 0.6rem;
}
.project-card h4 {
  font-family: var(--display);
  font-size: 1.15rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
  line-height: 1.25;
}
.project-card p {
  font-size: 0.88rem;
  color: var(--ink-soft);
  line-height: 1.5;
  margin-bottom: 1rem;
}

.tag-row { display: flex; gap: 0.4rem; flex-wrap: wrap; }
.tag {
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.25rem 0.55rem;
  background: var(--paper-deep);
  color: var(--ink-soft);
  border-radius: var(--radius);
}
.tag.tag-status {
  background: transparent;
  border: 1px solid var(--rule);
}
.tag.tag-live { color: var(--gold-deep); border-color: var(--gold); }
.tag.tag-draft { color: var(--ink-mute); }
.tag.tag-patent { background: var(--ink); color: var(--paper); }

/* ============================================================
   LICENSING dual-track
   ============================================================ */
.licensing {
  background: var(--night);
  color: var(--paper);
  position: relative;
  overflow: hidden;
}
.licensing::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--night-rule) 1px, transparent 1px),
    linear-gradient(90deg, var(--night-rule) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.18;
  mask-image: radial-gradient(ellipse at 30% 50%, black 10%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at 30% 50%, black 10%, transparent 70%);
}
.licensing .container { position: relative; z-index: 2; }
.licensing h2, .licensing h3 { color: var(--paper); }
.licensing .section-header .intro { color: var(--paper-warm); }
.licensing .eyebrow { color: var(--gold-glow); }

.license-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border: 1px solid var(--night-rule);
}
.license-card {
  padding: 2.5rem;
  border-right: 1px solid var(--night-rule);
  position: relative;
}
.license-card:last-child { border-right: none; }

.license-card .lc-tag {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: 0.6rem;
}
.license-card h3 {
  font-family: var(--display);
  font-size: 1.8rem;
  font-weight: 500;
  margin-bottom: 0.4rem;
}
.license-card .lc-sub {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--gold-glow);
  margin-bottom: 1.5rem;
}
.license-card .lc-body {
  font-size: 0.97rem;
  color: var(--paper-warm);
  line-height: 1.6;
  margin-bottom: 1.5rem;
}
.license-card ul {
  list-style: none;
  margin-bottom: 1.8rem;
}
.license-card li {
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--night-rule);
  font-size: 0.92rem;
  color: var(--paper-warm);
  display: flex;
  gap: 0.6rem;
  align-items: flex-start;
}
.license-card li::before {
  content: '+';
  color: var(--gold-glow);
  font-family: var(--mono);
  flex-shrink: 0;
}

.license-card.featured {
  background: linear-gradient(135deg, var(--night-2) 0%, var(--night) 100%);
}
.license-card.featured .lc-tag { color: var(--gold-glow); }

/* ============================================================
   WHITEPAPERS / RESEARCH
   ============================================================ */
.papers {
  background: var(--paper);
}
.paper-list {
  border-top: 3px double var(--rule);
}
.paper-row {
  display: grid;
  grid-template-columns: 100px 1fr auto;
  gap: 2rem;
  padding: 1.8rem 0;
  border-bottom: 1px solid var(--rule);
  align-items: baseline;
  text-decoration: none;
  color: var(--ink);
  transition: padding-left .2s;
}
.paper-row:hover {
  padding-left: 1rem;
  border-bottom-color: var(--ink);
}
.paper-row .pr-num {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: var(--ink-mute);
}
.paper-row .pr-title {
  font-family: var(--display);
  font-size: 1.25rem;
  font-weight: 500;
  line-height: 1.3;
}
.paper-row .pr-authors {
  font-size: 0.88rem;
  color: var(--ink-mute);
  margin-top: 0.3rem;
  font-family: var(--body);
}
.paper-row .pr-meta {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--ink-mute);
  text-align: right;
  white-space: nowrap;
}
.paper-row .pr-meta .status {
  display: inline-block;
  margin-top: 0.3rem;
  padding: 0.15rem 0.5rem;
  border: 1px solid var(--rule);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

/* ============================================================
   CRYPTOCURRENCY callout
   ============================================================ */
.crypto-strip {
  background: var(--paper-deep);
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}
.crypto-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}
.crypto-visual {
  aspect-ratio: 1;
  max-width: 380px;
  position: relative;
  margin: 0 auto;
}
.crypto-visual svg { width: 100%; height: 100%; }

.crypto-text h2 { margin-bottom: 1rem; }
.crypto-text .crypto-lede {
  font-family: var(--display);
  font-size: 1.2rem;
  line-height: 1.5;
  color: var(--ink-soft);
  margin-bottom: 1.5rem;
}
.crypto-text p { margin-bottom: 1rem; }
.crypto-specs {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin: 2rem 0;
  padding: 1.5rem 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}
.crypto-specs dt {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: 0.3rem;
}
.crypto-specs dd {
  font-family: var(--display);
  font-size: 1.05rem;
  color: var(--ink);
}

/* ============================================================
   CONTRIBUTE
   ============================================================ */
.contribute {
  background: var(--paper-warm);
}
.contrib-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}
.contrib-card {
  background: var(--paper);
  padding: 2rem;
  transition: background .2s;
}
.contrib-card:hover { background: var(--paper-warm); }
.contrib-card .cc-icon {
  width: 40px;
  height: 40px;
  margin-bottom: 1.2rem;
  color: var(--gold-deep);
}
.contrib-card h4 {
  font-family: var(--display);
  font-size: 1.25rem;
  font-weight: 500;
  margin-bottom: 0.6rem;
}
.contrib-card p {
  font-size: 0.93rem;
  color: var(--ink-soft);
  margin-bottom: 1.2rem;
}
.contrib-card .cc-link {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink);
  border-bottom: 1px solid var(--ink);
}
.contrib-card .cc-link:hover { color: var(--gold-deep); border-bottom-color: var(--gold-deep); }

/* ============================================================
   NEWS strip (compact)
   ============================================================ */
.news-strip {
  background: var(--paper);
}
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}
.news-item {
  display: block;
  text-decoration: none;
  color: var(--ink);
  border-top: 2px solid var(--ink);
  padding-top: 1.2rem;
}
.news-item:hover .ni-title { color: var(--gold-deep); }
.ni-date {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--ink-mute);
  margin-bottom: 0.6rem;
}
.ni-title {
  font-family: var(--display);
  font-size: 1.15rem;
  font-weight: 500;
  line-height: 1.3;
  margin-bottom: 0.5rem;
  transition: color .2s;
}
.ni-excerpt {
  font-size: 0.9rem;
  color: var(--ink-soft);
  line-height: 1.5;
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  background: var(--night);
  color: var(--paper-warm);
  padding: 4.5rem 0 2rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(4, 1fr);
  gap: 3rem;
  margin-bottom: 3rem;
}
.footer-brand .brand-mark {
  border-color: var(--paper-warm);
  background: transparent;
  color: var(--paper);
}
.footer-brand .brand-name { color: var(--paper); }
.footer-brand .brand-tag { color: var(--ink-mute); }
.footer-brand p {
  margin-top: 1.5rem;
  font-size: 0.92rem;
  color: var(--ink-mute);
  max-width: 32ch;
}

.footer-col h5 {
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold-glow);
  margin-bottom: 1.2rem;
}
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 0.6rem; }
.footer-col a {
  color: var(--paper-warm);
  font-size: 0.92rem;
  border: none;
}
.footer-col a:hover { color: var(--gold-glow); border: none; }

.footer-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 2rem;
  border-top: 1px solid var(--night-rule);
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--ink-mute);
  letter-spacing: 0.08em;
}
.footer-bar a { color: var(--ink-mute); border: none; }
.footer-bar a:hover { color: var(--paper); }

/* ============================================================
   PAGE HEADER (inner pages)
   ============================================================ */
.page-header {
  background: var(--night);
  color: var(--paper);
  padding: 5rem 0 4rem;
  position: relative;
  overflow: hidden;
}
.page-header::after {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(217, 119, 6, 0.15) 0%, transparent 65%);
  pointer-events: none;
}
.page-header .container { position: relative; z-index: 2; }
.page-header .eyebrow { color: var(--gold-glow); }
.page-header h1 {
  color: var(--paper);
  font-weight: 400;
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  margin-top: 0.5rem;
  margin-bottom: 1rem;
}
.page-header .lede {
  font-family: var(--display);
  font-size: 1.2rem;
  color: var(--paper-warm);
  max-width: 60ch;
  line-height: 1.5;
}

.breadcrumb {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: var(--ink-mute);
  margin-bottom: 0.5rem;
}
.breadcrumb a { color: var(--paper-warm); border: none; }
.breadcrumb a:hover { color: var(--gold-glow); border: none; }
.breadcrumb .sep { margin: 0 0.5rem; color: var(--ink-mute); }

/* ============================================================
   ARTICLE / PROSE
   ============================================================ */
.prose {
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--ink);
}
.prose h2 {
  margin-top: 3rem;
  margin-bottom: 1rem;
  font-size: 1.8rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--rule);
}
.prose h3 {
  margin-top: 2rem;
  margin-bottom: 0.8rem;
  font-family: var(--display);
  font-weight: 500;
  font-size: 1.35rem;
}
.prose p { margin-bottom: 1.2rem; }
.prose ul, .prose ol { margin-bottom: 1.2rem; padding-left: 1.5rem; }
.prose li { margin-bottom: 0.5rem; }
.prose blockquote {
  border-left: 3px solid var(--gold);
  padding: 0.5rem 0 0.5rem 1.5rem;
  margin: 1.5rem 0;
  font-family: var(--display);
  font-size: 1.15rem;
  font-style: italic;
  color: var(--ink-soft);
}
.prose .callout {
  background: var(--paper-warm);
  border-left: 3px solid var(--ink);
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
}
.prose .callout strong {
  display: block;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
  color: var(--gold-deep);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 900px) {
  .nav-links { display: none; }
  .nav-toggle { display: block; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--rule);
    padding: 1.5rem 2rem;
    gap: 1rem;
    align-items: flex-start;
  }

  .hero-inner { grid-template-columns: 1fr; gap: 2.5rem; }
  .hero-meta { border-left: none; border-top: 1px solid var(--night-rule); padding-left: 0; padding-top: 2rem; }

  .section-header { grid-template-columns: 1fr; gap: 1rem; }

  .mission-grid { grid-template-columns: 1fr; gap: 2rem; }
  .mission-item { padding: 0; border-left: none; border-top: 1px solid var(--rule); padding-top: 1.5rem; }
  .mission-item:first-child { border-top: none; padding-top: 0; }

  .category-block { grid-template-columns: 1fr; gap: 1.5rem; }
  .category-meta { position: static; }
  .project-list { grid-template-columns: 1fr; }

  .license-grid { grid-template-columns: 1fr; }
  .license-card { border-right: none; border-bottom: 1px solid var(--night-rule); }
  .license-card:last-child { border-bottom: none; }

  .paper-row { grid-template-columns: 1fr; gap: 0.5rem; }
  .paper-row .pr-meta { text-align: left; }

  .crypto-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .crypto-specs { grid-template-columns: 1fr; }

  .contrib-grid { grid-template-columns: 1fr; }

  .news-grid { grid-template-columns: 1fr; }

  .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
  .footer-brand { grid-column: 1 / -1; }

  .footer-bar { flex-direction: column; gap: 1rem; text-align: center; }
}

@media (max-width: 600px) {
  section { padding: 4rem 0; }
  .container, .container-narrow { padding: 0 1.25rem; }
  .nav { padding: 1rem 1.25rem; }
  .hero { padding: 5rem 0 4rem; }
}

/* ============================================================
   ANIMATIONS
   ============================================================ */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero-eyebrow,
.hero h1,
.hero-lede,
.hero-actions,
.hero-meta { animation: fadeUp .8s cubic-bezier(.16,1,.3,1) backwards; }
.hero-eyebrow { animation-delay: .05s; }
.hero h1 { animation-delay: .15s; }
.hero-lede { animation-delay: .3s; }
.hero-actions { animation-delay: .45s; }
.hero-meta { animation-delay: .55s; }

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