/* ══════════════════════════════════════════════════════════════
   SILVER & SALT CAPITAL — SHARED STYLES
   Brand standards stylesheet · tokens + shared components
   ══════════════════════════════════════════════════════════════ */

/* ─── 1. DESIGN TOKENS ─────────────────────────────────────── */
:root {
  /* Color palette */
  --cream: #FBF8F2;
  --sand: #F4EFE6;
  --moss: #2F3E34;
  --moss-light: #4A5E50;
  --moss-soft: #6B7E72;
  --sage: #7E8E84;
  --rust: #D16B4F;
  --teal: #1A8F7D;
  --warm: #C4A47E;
  --ink: #3D5A99;
  --copper: #C87F5A;

  /* Semantic text colors */
  --text-primary: #2F3E34;
  --text-body: #4A5E50;
  --text-muted: #7E8E84;
  --text-on-dark: #F0EDE7;
  --text-on-dark-body: #B8C4BB;
  --text-on-dark-dim: #8A9E90;

  /* Active palette — set by JS on index.html */
  --pop: #D16B4F;
  --pop-hover: #E07A5E;
  --pop-glow: rgba(209,107,79,0.16);
  --pop-text: white;
  --accent: #1A8F7D;
  --accent-soft: rgba(26,143,125,0.10);
  --highlight: #E07A5E;

  /* Borders */
  --border: rgba(47,62,52,0.08);
  --border-dark: rgba(240,237,231,0.08);

  /* Spacing scale */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-7: 28px;
  --space-8: 32px;
  --space-9: 40px;
  --space-10: 48px;
  --space-11: 56px;
  --space-12: 64px;
  --space-13: 80px;
  --space-14: 96px;
  --space-15: 112px;
  --space-16: 120px;

  /* Type scale — static */
  --text-2xs: 11px;
  --text-xs: 12px;
  --text-sm: 13px;
  --text-base: 15px;
  --text-md: 16px;
  --text-lg: 17px;
  --text-xl: 18px;
  --text-2xl: 19px;
  --text-3xl: 20px;
  --text-4xl: 22px;

  /* Type scale — fluid headings */
  --text-h6: clamp(20px, 2.8vw, 28px);
  --text-h5: clamp(22px, 3vw, 32px);
  --text-h4: clamp(26px, 3.5vw, 36px);
  --text-h3: clamp(28px, 4vw, 42px);
  --text-h2: clamp(36px, 5.5vw, 56px);
  --text-h1: clamp(48px, 7vw, 72px);
  --text-display: clamp(52px, 8vw, 108px);

  /* Border radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 50%;
  --radius-pill: 100px;

  /* Letter spacing */
  --tracking-tight: -0.03em;
  --tracking-snug: -0.02em;
  --tracking-normal: -0.01em;
  --tracking-wide: 0.02em;
  --tracking-wider: 0.06em;
  --tracking-widest: 0.14em;
  --tracking-ultra: 0.22em;

  /* Line height */
  --leading-none: 1;
  --leading-tight: 1.1;
  --leading-snug: 1.3;
  --leading-normal: 1.55;
  --leading-relaxed: 1.7;
  --leading-loose: 1.8;
}

/* ─── 2. RESET & BASE ──────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Satoshi', sans-serif;
  background: var(--cream);
  color: var(--text-body);
  -webkit-font-smoothing: antialiased;
  font-size: var(--text-2xl);
  line-height: var(--leading-relaxed);
  overflow-x: hidden;
}

/* ─── 3. TYPOGRAPHY ─────────────────────────────────────────── */
.label {
  font-family: 'Satoshi', sans-serif;
  font-size: var(--text-base);
  font-weight: 700;
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  margin-bottom: var(--space-4);
  display: inline-block;
  color: var(--pop);
}
h2 {
  font-family: 'Satoshi', sans-serif;
  font-weight: 900;
  font-size: clamp(30px, 4.5vw, 50px);
  line-height: 1.06;
  letter-spacing: var(--tracking-tight);
  color: var(--moss);
  margin-bottom: var(--space-6);
}
h2 em { font-style: normal; color: var(--pop); }
h3 {
  font-family: 'Satoshi', sans-serif;
  font-weight: 700;
  font-size: var(--text-2xl);
  color: var(--moss);
  margin-bottom: var(--space-2);
  letter-spacing: var(--tracking-normal);
}
.body {
  font-size: var(--text-2xl);
  line-height: 1.76;
  max-width: 600px;
  color: var(--text-body);
}
.body + .body { margin-top: var(--space-4); }

sup.fn {
  font-size: var(--text-2xs);
  font-weight: 600;
  color: var(--pop);
  vertical-align: super;
  line-height: 0;
  margin-left: 1px;
  opacity: .7;
}
sup.fn a { color: inherit; text-decoration: none; }

.brand-amp {
  font-family: 'Cormorant Garamond', serif;
  font-weight: 400;
  font-size: 0.8em;
  font-style: normal;
  margin: 0 -.04em;
}

/* ─── 4. SURFACE CLASSES ────────────────────────────────────── */
.s-cream { background: var(--cream); }
.s-sand { background: var(--sand); }
.s-dark { background: var(--moss); color: var(--text-on-dark); }
.s-dark h2 { color: var(--text-on-dark); }
.s-dark h2 em { color: var(--highlight); }
.s-dark h3 { color: var(--text-on-dark); }
.s-dark .body { color: var(--text-on-dark-body); }
.s-dark .label { color: var(--highlight); opacity: .8; }
.s-dark sup.fn { color: var(--highlight); opacity: .5; }

.s-glow { position: relative; overflow: hidden; }
.s-glow::before {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 50% 50% at 85% 15%, var(--accent-soft) 0%, transparent 50%),
    radial-gradient(ellipse 40% 40% at 10% 85%, var(--pop-glow) 0%, transparent 50%);
}

/* ─── 5. BUTTONS ────────────────────────────────────────────── */
.btn {
  font-family: 'Satoshi', sans-serif;
  font-weight: 700;
  font-size: var(--text-md);
  letter-spacing: var(--tracking-wide);
  padding: var(--space-4) var(--space-9);
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  transition: all .25s ease;
}
.btn-primary {
  background: var(--pop);
  color: var(--pop-text);
}
.btn-primary:hover {
  background: var(--pop-hover);
  transform: translateY(-2px);
  box-shadow: 0 12px 32px var(--pop-glow);
}
.btn-outline {
  background: transparent;
  color: var(--moss);
  border: 1.5px solid var(--border);
}
.btn-outline:hover {
  border-color: var(--pop);
  color: var(--pop);
}
.btn-ghost {
  background: none;
  color: var(--pop);
  padding: 0;
  font-size: var(--text-base);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  border-bottom: 1px solid rgba(209,107,79,0.3);
  padding-bottom: 2px;
  border-radius: 0;
}
.btn-ghost:hover {
  border-color: var(--pop);
}

/* Legacy button aliases (transitional) */
.btn-pop { background: var(--pop); color: var(--pop-text); }
.btn-pop:hover { background: var(--pop-hover); transform: translateY(-2px); box-shadow: 0 12px 32px var(--pop-glow); }
.btn-dark { background: var(--pop); color: var(--pop-text); }
.btn-dark:hover { background: var(--pop-hover); transform: translateY(-2px); }

/* ─── 6. LAYOUT ─────────────────────────────────────────────── */
section { padding: var(--space-14) 48px; }
.wrap { max-width: 1100px; margin: 0 auto; }
.narrow { max-width: 620px; }

/* ─── 7. NAVIGATION — Shared chrome ─────────────────────────── */
/* 7a. Shared nav base (all pages) */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  background: rgba(251,248,242,0.92);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--border);
}

/* 7b. Standalone page nav (manifesto, opportunity, networks, open-research) */
nav.nav-standalone {
  padding: 0 var(--space-10);
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: var(--moss);
}
.nav-name {
  font-family: 'Cormorant Garamond', serif;
  font-size: var(--text-4xl);
  font-weight: 600;
}
.nav-name .amp { color: var(--rust); }
.nav-links {
  list-style: none;
  display: flex;
  gap: var(--space-6);
}
.nav-links a {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--sage);
  text-decoration: none;
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  transition: color 0.2s;
}
.nav-links a:hover,
.nav-links a.active { color: var(--moss); }
.nav-cta {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--pop);
  text-decoration: none;
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
}
.nav-cta:hover { opacity: 0.8; }
.nav-back {
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--sage);
  text-decoration: none;
}

/* 7c. Mobile hamburger menu (standalone pages) */
.nav-menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
}
.nav-menu-btn span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--moss);
  border-radius: 1px;
  transition: all .25s;
}
.nav-menu-btn span + span { margin-top: 5px; }
body.nav-open .nav-menu-btn span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
body.nav-open .nav-menu-btn span:nth-child(2) { opacity: 0; }
body.nav-open .nav-menu-btn span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }
.nav-dropdown {
  display: none;
  position: fixed;
  top: 60px; left: 0; right: 0;
  background: rgba(251,248,242,0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: var(--space-5) var(--space-10);
  flex-direction: column;
  gap: var(--space-4);
  z-index: 49;
}
.nav-dropdown a {
  font-size: var(--text-md);
  font-weight: 600;
  color: var(--moss);
  text-decoration: none;
  padding: var(--space-2) 0;
  display: block;
}
.nav-dropdown a:hover { color: var(--pop); }
body.nav-open .nav-dropdown { display: flex; }

/* 7d. Index nav — two-tier system */
.nav-top {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-3) var(--space-10) var(--space-3);
}
.nav-mark {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  cursor: pointer;
}
.nav-mark .split-circle {
  width: 36px; height: 36px;
  border-radius: var(--radius-full);
  position: relative;
  overflow: hidden;
  flex-shrink: 0;
}
.nav-mark .sc-left { position: absolute; top: 0; left: 0; width: 50%; height: 100%; background: var(--moss); }
.nav-mark .sc-right { position: absolute; top: 0; right: 0; width: 50%; height: 100%; background: var(--pop); transition: background .3s; }
/* On dark backgrounds: sage left half for visibility */
.s-dark .nav-mark .sc-left, .s-dark .f-mark .sc-left { background: var(--sage); }
.nav-mark .sc-amp {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
  font-family: 'Cormorant Garamond', serif;
  font-size: var(--text-4xl);
  font-weight: 600;
  color: white;
  z-index: 2;
  line-height: var(--leading-none);
}
.nav-mark .wordmark {
  font-family: 'Cormorant Garamond', serif;
  font-weight: 700;
  font-size: var(--text-h6);
  color: var(--moss);
  letter-spacing: var(--tracking-normal);
  line-height: 1.2;
  white-space: nowrap;
}
.nav-mark .wm-amp {
  font-size: 0.8em;
  font-weight: 400;
  margin: 0 -.08em;
}
.nav-apply {
  font-family: 'Satoshi', sans-serif;
  font-weight: 700;
  font-size: var(--text-sm);
  letter-spacing: var(--tracking-wide);
  padding: var(--space-2) var(--space-5);
  border-radius: var(--radius-md);
  background: var(--pop);
  color: var(--pop-text);
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all .25s;
}
.nav-apply:hover {
  background: var(--pop-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px var(--pop-glow);
}
.nav-rail {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 0;
  padding: 0 var(--space-10);
  height: 36px;
  border-bottom: 1px solid var(--border);
}
.nav-tabs { display: flex; gap: 0; height: 100%; }
.nav-tab {
  font-family: 'Satoshi', sans-serif;
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--moss);
  text-decoration: none;
  padding: 0 var(--space-5) 0 0;
  height: 100%;
  display: flex;
  align-items: center;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: all .25s;
  background: none;
  border-top: none;
  border-left: none;
  border-right: none;
}
.nav-tab:hover { color: var(--pop); }
.nav-tab.active { color: var(--moss); border-bottom-color: var(--moss); }

/* ─── 8. COMPONENTS ─────────────────────────────────────────── */
/* 8a. Page system (index.html) */
.page { display: none; min-height: 100vh; padding-top: 0; }
.page.active { display: block; }

/* 8b. Grain overlay — opt-in via class */
.has-grain::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 100;
  opacity: 0.4;
}

/* 8c. Split-circle mark (footer) */
.f-mark { position: relative; z-index: 1; flex-shrink: 0; }
.f-mark .split-circle {
  width: 40px; height: 40px;
  border-radius: var(--radius-full);
  position: relative;
  overflow: hidden;
  flex-shrink: 0;
}
.f-mark .sc-left { position: absolute; top: 0; left: 0; width: 50%; height: 100%; background: var(--moss); }
.f-mark .sc-right { position: absolute; top: 0; right: 0; width: 50%; height: 100%; background: var(--pop); transition: background .3s; }
.f-mark .sc-amp {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
  font-family: 'Cormorant Garamond', serif;
  font-size: 21px;
  font-weight: 300;
  color: white;
  z-index: 2;
  line-height: var(--leading-none);
}

/* 8d. Footer */
footer {
  padding: var(--space-5) var(--space-10) var(--space-4);
  text-align: left;
  background: var(--sand);
  position: relative;
  overflow: hidden;
}
footer .f-inner {
  max-width: 1100px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  justify-content: space-between;
}
footer .f-left { display: flex; align-items: flex-start; gap: var(--space-4); }
footer .f-content { display: flex; flex-direction: column; gap: var(--space-1); }
footer .f-right { text-align: right; flex-shrink: 0; }
.f-copy { font-size: var(--text-sm); color: var(--text-muted); opacity: .35; }
footer::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: var(--border);
}
footer::after {
  content: '&';
  position: absolute;
  top: 50%; right: -40px;
  transform: translateY(-50%);
  font-family: 'Cormorant Garamond', serif;
  font-size: 280px;
  font-weight: 300;
  color: var(--moss);
  opacity: .04;
  line-height: var(--leading-none);
  pointer-events: none;
  user-select: none;
}
.f-wordmark {
  font-family: 'Cormorant Garamond', serif;
  font-weight: 300;
  font-size: 22px;
  color: var(--moss);
  line-height: 1.15;
  text-align: left;
  letter-spacing: var(--tracking-snug);
}
.f-tag {
  font-family: 'Cormorant Garamond', serif;
  font-weight: 300;
  font-style: italic;
  font-size: var(--text-lg);
  color: var(--sage);
  line-height: 1.4;
  letter-spacing: 0.01em;
}
.f-sitemap {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
  width: 100%;
}
.f-sitemap-heading {
  font-family: 'Satoshi', sans-serif;
  font-size: var(--text-2xs);
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--moss);
  margin-bottom: var(--space-2);
}
.f-sitemap-link {
  display: block;
  font-family: 'Satoshi', sans-serif;
  font-size: var(--text-sm);
  color: var(--sage);
  text-decoration: none;
  cursor: pointer;
  line-height: var(--leading-snug);
  margin-bottom: 3px;
  transition: color .2s;
}
.f-sitemap-link:hover { color: var(--pop); }
.f-brand-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
  border-top: 1px solid var(--border);
  padding-top: var(--space-3);
}
.f-legal {
  font-family: 'Satoshi', sans-serif;
  font-size: 12px;
  color: var(--text-muted);
  opacity: .55;
  line-height: 1.6;
  margin-top: var(--space-2);
  max-width: 600px;
}

/* 8e. Footnotes */
.footnotes {
  padding: var(--space-12) var(--space-10);
  border-top: 1px solid var(--border);
}
.fn-title {
  font-family: 'Satoshi', sans-serif;
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--space-5);
}
.fn-item {
  font-size: var(--text-sm);
  line-height: 1.75;
  color: var(--text-muted);
  margin-bottom: var(--space-1);
  padding-left: var(--space-5);
  position: relative;
}
.fn-item .n {
  position: absolute;
  left: 0;
  font-weight: 600;
  color: var(--pop);
  opacity: .6;
}
.fn-item a {
  color: var(--text-body);
  text-decoration: none;
  border-bottom: 1px solid var(--border);
  transition: color .2s;
}
.fn-item a:hover { color: var(--pop); }

/* 8f. Page sources — single section at page bottom */
.page-sources {
  max-width: 1100px;
  margin: 0 auto;
  padding: var(--space-10) var(--space-10) var(--space-12);
  border-top: 1px solid var(--border);
}
.page-sources-heading {
  font-family: 'Satoshi', sans-serif;
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: var(--space-5);
}
.page-sources-list {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.page-sources-list li {
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
  color: var(--text-muted);
  display: flex;
  gap: var(--space-2);
}
.page-sources-list .claim {
  color: var(--text-body);
}
.page-sources-list .source {
  color: var(--sage);
  white-space: nowrap;
}
.page-sources-list .source a {
  color: var(--sage);
  text-decoration: none;
  border-bottom: 1px solid var(--border);
  transition: color .2s;
}
.page-sources-list .source a:hover {
  color: var(--pop);
}
.page-sources-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: 'Satoshi', sans-serif;
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--pop);
  text-decoration: none;
  border-bottom: 1px solid rgba(209,107,79,0.3);
  padding-bottom: 2px;
  transition: border-color .2s;
}
.page-sources-link:hover {
  border-color: var(--pop);
}

/* Inline citation number (gray, subtle) */
.ref {
  font-size: 0.6em;
  vertical-align: super;
  line-height: 0;
  color: var(--sage);
  font-weight: 600;
  margin-left: 1px;
  font-family: 'Satoshi', sans-serif;
}
.s-dark .ref {
  color: var(--text-on-dark-dim);
}

/* ─── 9. ANIMATIONS ─────────────────────────────────────────── */
/* Fade/reveal animations removed from brand system.
   Classes kept as no-ops so existing markup doesn't break. */
@keyframes up {
  from { opacity: 1; transform: none; }
  to { opacity: 1; transform: none; }
}
@keyframes fadeUp {
  from { opacity: 1; transform: none; }
  to { opacity: 1; transform: none; }
}
.r { opacity: 1; transform: none; }
.r.v { opacity: 1; transform: none; }
.rd1, .rd2, .rd3 { transition-delay: 0s; }

.fade { opacity: 1; animation: none; }
.fade-d1, .fade-d2, .fade-d3, .fade-d4 { animation-delay: 0s; }

/* ─── 10. RESPONSIVE — Shared breakpoints ───────────────────── */
@media(max-width: 900px) {
  section { padding-left: var(--space-5); padding-right: var(--space-5); }
}

@media(max-width: 768px) {
  /* Standalone nav hamburger */
  .nav-standalone .nav-links { display: none; }
  .nav-standalone .nav-cta { display: none; }
  .nav-standalone .nav-menu-btn { display: block; }

  /* Sources table: stack vertically on mobile */
  .page-sources-list li { flex-direction: column; gap: 2px; }
  .page-sources-list .source { white-space: normal; }
  .page-sources { padding: var(--space-8) var(--space-5) var(--space-10); }
}

@media(max-width: 600px) {
  .nav-rail { padding-left: 12px; padding-right: 12px; }
  .nav-tabs { justify-content: space-between; width: 100%; }
  .nav-tab { font-size: 10px; letter-spacing: .04em; padding: 0; white-space: nowrap; }
  .nav-top { padding-left: 12px; padding-right: 12px; }
  .f-sitemap { grid-template-columns: repeat(2, 1fr); gap: var(--space-6); }
  .f-brand-row { flex-direction: column; gap: var(--space-3); }
  .f-right { text-align: left; }
}

@media(max-width: 480px) {
  section { padding-left: var(--space-4); padding-right: var(--space-4); }
}