/* =========================================================
   Vaults Capital — shared stylesheet
   Edit color and type tokens in :root to rebrand globally
   ========================================================= */

:root {
  /* Palette */
  --bg: #FBFAF6;
  --bg-elevated: #FFFFFF;
  --bg-muted: #F4F1E9;
  --ink: #0F1419;
  --ink-muted: #5C6066;
  --ink-subtle: #999CA1;
  --accent: #5C1A22;
  --accent-hover: #3F1419;
  --accent-soft: #F0E2E4;
  --accent-deep: #2E0F17;
  --border: #E8E4DA;
  --border-strong: #C5BFB1;
  --success: #2D5A3E;
  --danger: #8B2E2E;

  /* Type */
  --font-serif: "Spectral", Georgia, "Times New Roman", serif;
  --font-sans: "DM Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;

  /* Layout */
  --max-w: 1200px;
  --read-w: 680px;
  --gutter: clamp(1.25rem, 4vw, 2.5rem);

  /* Motion */
  --ease: cubic-bezier(0.2, 0.6, 0.2, 1);
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; text-decoration: none; }
a:hover { color: var(--accent); }

img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

::selection { background: var(--accent); color: var(--bg); }

/* ---------- Layout containers ---------- */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--gutter);
}
.container--narrow { max-width: 880px; }
.container--read { max-width: var(--read-w); }

.section { padding: clamp(3.5rem, 8vw, 6rem) 0; }
.section--tight { padding: clamp(2.5rem, 5vw, 4rem) 0; }
.section--alt { background: var(--bg-muted); }

/* ---------- Typography ---------- */
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 400;
  letter-spacing: -0.012em;
  line-height: 1.15;
  color: var(--ink);
}
h1 { font-size: clamp(2.5rem, 6vw, 4.25rem); }
h2 { font-size: clamp(2rem, 4vw, 2.75rem); }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.15rem; }
p { color: var(--ink); }
strong { font-weight: 500; }
em { font-style: italic; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

.lede {
  font-family: var(--font-serif);
  font-size: clamp(1.15rem, 2vw, 1.35rem);
  line-height: 1.55;
  color: var(--ink-muted);
  font-weight: 300;
}

/* ---------- Header / nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(140%) blur(8px);
  -webkit-backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid var(--border);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.brand {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 500;
  letter-spacing: -0.005em;
  color: var(--ink);
}
.brand .brand-icon {
  display: inline-block;
  height: 28px;
  width: auto;
  margin-right: 12px;
  vertical-align: middle;
  transform: translateY(-2px);
}
.brand .brand-icon--cream {
  filter: none;
}
.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
  list-style: none;
}
.nav-links a {
  font-size: 0.9rem;
  color: var(--ink-muted);
  position: relative;
  transition: color 200ms var(--ease);
}
.nav-links a:hover { color: var(--ink); }
.nav-links a.is-active { color: var(--accent); }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0.7rem 1.25rem;
  font-size: 0.9rem;
  font-weight: 500;
  border: 1px solid var(--ink);
  color: var(--ink);
  background: transparent;
  transition: all 200ms var(--ease);
  font-family: inherit;
}
.btn:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--bg);
}
.btn--primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--bg);
}
.btn--primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: var(--bg);
}
.btn--ghost {
  border-color: var(--border-strong);
  color: var(--ink-muted);
}
.btn--ghost:hover {
  border-color: var(--ink);
  color: var(--ink);
  background: transparent;
}

.nav-toggle {
  display: none;
  width: 32px;
  height: 32px;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
}
.nav-toggle span {
  display: block;
  height: 1.5px;
  background: var(--ink);
  transition: transform 200ms var(--ease);
}

/* ---------- Hero ---------- */
.hero {
  padding: clamp(4rem, 9vw, 7rem) 0 clamp(3rem, 6vw, 5rem);
  border-bottom: 1px solid var(--border);
}
.hero h1 {
  margin: 1.5rem 0 1.5rem;
  max-width: 14ch;
}
.hero h1 em {
  color: var(--accent);
  font-style: italic;
}
.hero .lede {
  max-width: 36ch;
  margin-bottom: 2.5rem;
}
.hero-actions { display: flex; gap: 0.75rem; flex-wrap: wrap; }

/* ---------- Pillars ---------- */
.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1.5rem, 4vw, 3.5rem);
  padding: clamp(3rem, 6vw, 4.5rem) 0;
  border-bottom: 1px solid var(--border);
}
.pillar .eyebrow { display: block; margin-bottom: 1rem; color: var(--accent); }
.pillar h3 {
  font-size: 1.35rem;
  margin-bottom: 0.6rem;
}
.pillar p {
  font-size: 0.95rem;
  color: var(--ink-muted);
  line-height: 1.6;
}

/* ---------- Why Vaults section ---------- */
.compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 2.5rem;
}
.compare-card {
  padding: 1.75rem;
  border-radius: 4px;
  border: 1px solid var(--border);
}
.compare-card--us {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--bg);
}
.compare-card--them {
  background: var(--bg-muted);
}
.compare-card h3 {
  font-size: 1.05rem;
  font-family: var(--font-sans);
  font-weight: 500;
  margin-bottom: 1.25rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--border-strong);
}
.compare-card--us h3 { color: var(--bg); border-color: rgba(251,250,246,0.25); }
.compare-card ul { list-style: none; display: flex; flex-direction: column; gap: 0.9rem; }
.compare-card li {
  font-size: 0.92rem;
  line-height: 1.55;
  display: flex;
  gap: 0.6rem;
  align-items: flex-start;
}
.compare-card--us li { color: var(--bg); }
.compare-card--them li { color: var(--ink-muted); }
.compare-card--us li::before {
  content: "";
  display: inline-block;
  flex: 0 0 6px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--bg);
  margin-top: 0.55rem;
}
.compare-card--them li::before {
  content: "";
  display: inline-block;
  flex: 0 0 8px;
  width: 8px;
  height: 1.5px;
  background: var(--ink-subtle);
  margin-top: 0.7rem;
}

.section-head {
  text-align: center;
  margin-bottom: 2.5rem;
}
.section-head .eyebrow { display: block; margin-bottom: 0.75rem; color: var(--accent); }
.section-head h2 { max-width: 22ch; margin: 0 auto 1rem; }
.section-head p {
  color: var(--ink-muted);
  max-width: 50ch;
  margin: 0 auto;
  font-size: 1rem;
}

/* ---------- Research feed ---------- */
.feed {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.feed-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 2rem;
}
.feed-head h2 { font-size: 1.85rem; }
.feed-head a {
  font-size: 0.9rem;
  color: var(--ink-muted);
  border-bottom: 1px solid var(--border-strong);
  padding-bottom: 1px;
  transition: all 200ms var(--ease);
}
.feed-head a:hover { color: var(--accent); border-color: var(--accent); }

.article-card {
  display: block;
  border-top: 1px solid var(--border-strong);
  padding-top: 1.25rem;
  transition: transform 250ms var(--ease);
}
.article-card:hover { transform: translateY(-2px); color: inherit; }
.article-card:hover h3 { color: var(--accent); }
.article-card .eyebrow { display: block; margin-bottom: 0.85rem; }
.article-card h3 {
  font-size: 1.25rem;
  line-height: 1.25;
  margin-bottom: 0.75rem;
  transition: color 200ms var(--ease);
}
.article-card .excerpt {
  font-size: 0.9rem;
  color: var(--ink-muted);
  line-height: 1.55;
  margin-bottom: 1rem;
}
.article-card .meta {
  font-size: 0.78rem;
  color: var(--ink-subtle);
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}

/* ---------- Subscribe pricing ---------- */
.pricing {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  max-width: 720px;
  margin: 0 auto;
}
.tier {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 2rem;
  display: flex;
  flex-direction: column;
}
.tier--featured {
  border: 1.5px solid var(--accent);
  position: relative;
}
.tier--featured::before {
  content: "Most popular";
  position: absolute;
  top: -12px;
  left: 1.5rem;
  background: var(--accent);
  color: var(--bg);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 10px;
  font-family: var(--font-mono);
}
.tier .eyebrow { margin-bottom: 0.85rem; }
.tier h3 {
  font-size: 1.4rem;
  margin-bottom: 0.4rem;
}
.tier .tier-desc {
  font-size: 0.9rem;
  color: var(--ink-muted);
  margin-bottom: 1.5rem;
  line-height: 1.5;
}
.tier .price {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 400;
  margin-bottom: 0.25rem;
  letter-spacing: -0.02em;
}
.tier .price-suffix { font-size: 0.95rem; color: var(--ink-muted); font-family: var(--font-sans); }
.tier ul {
  list-style: none;
  margin: 1.75rem 0;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  flex: 1;
}
.tier li {
  font-size: 0.9rem;
  display: flex;
  gap: 0.6rem;
  align-items: flex-start;
  color: var(--ink);
  line-height: 1.45;
}
.tier li::before {
  content: "";
  display: inline-block;
  flex: 0 0 14px;
  width: 14px;
  height: 14px;
  background: var(--accent-soft);
  border-radius: 50%;
  margin-top: 0.2rem;
  position: relative;
}
.tier li[data-disabled]::before { background: var(--bg-muted); }
.tier li[data-disabled] { color: var(--ink-subtle); text-decoration: line-through; }

/* ---------- Founders ---------- */
.founders {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}
.founder {
  display: flex;
  flex-direction: column;
}
.avatar {
  width: 88px;
  height: 88px;
  border-radius: 50%;
  background: var(--accent);
  border: 1px solid var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-serif);
  font-size: 1.5rem;
  color: var(--bg);
  margin-bottom: 1.25rem;
  letter-spacing: 0.02em;
}
.founder h3 {
  font-size: 1.15rem;
  font-family: var(--font-sans);
  font-weight: 500;
  margin-bottom: 0.2rem;
}
.founder .role {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  margin-bottom: 0.85rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.founder p {
  font-size: 0.92rem;
  color: var(--ink-muted);
  line-height: 1.55;
}

/* ---------- Newsletter inline ---------- */
.newsletter {
  background: var(--accent-deep);
  color: var(--bg);
  padding: clamp(3rem, 6vw, 5rem) 0;
}
.newsletter h2 { color: var(--bg); max-width: 18ch; }
.newsletter p { color: color-mix(in srgb, var(--bg) 70%, transparent); margin-top: 1rem; max-width: 50ch; }
.newsletter-form {
  display: flex;
  gap: 0.5rem;
  margin-top: 2rem;
  max-width: 480px;
}
.newsletter input[type="email"] {
  flex: 1;
  padding: 0.75rem 1rem;
  border: 1px solid color-mix(in srgb, var(--bg) 25%, transparent);
  background: transparent;
  color: var(--bg);
  font-family: inherit;
  font-size: 0.95rem;
}
.newsletter input[type="email"]::placeholder { color: color-mix(in srgb, var(--bg) 50%, transparent); }
.newsletter input[type="email"]:focus {
  outline: none;
  border-color: var(--bg);
}
.newsletter button {
  padding: 0.75rem 1.5rem;
  background: var(--bg);
  color: var(--ink);
  font-weight: 500;
  font-size: 0.9rem;
  font-family: inherit;
  transition: all 200ms var(--ease);
}
.newsletter button:hover { background: var(--accent-soft); }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 3.5rem 0 2rem;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 3rem;
}
.footer-top h4 {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-subtle);
  font-weight: 400;
  margin-bottom: 1rem;
}
.footer-top ul { list-style: none; display: flex; flex-direction: column; gap: 0.5rem; }
.footer-top a {
  font-size: 0.9rem;
  color: var(--ink-muted);
  transition: color 200ms var(--ease);
}
.footer-top a:hover { color: var(--accent); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 2rem;
  flex-wrap: wrap;
}
.disclaimer {
  font-size: 0.78rem;
  color: var(--ink-subtle);
  line-height: 1.6;
  max-width: 70ch;
}
.copyright {
  font-size: 0.78rem;
  color: var(--ink-subtle);
  font-family: var(--font-mono);
}

/* ---------- Article reading view ---------- */
.article-hero {
  padding: clamp(3rem, 6vw, 5rem) 0 clamp(2rem, 4vw, 3rem);
  border-bottom: 1px solid var(--border);
}
.article-hero .meta-row {
  display: flex;
  gap: 1rem;
  align-items: center;
  margin-bottom: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-muted);
  letter-spacing: 0.04em;
}
.article-hero .tag {
  padding: 4px 10px;
  background: var(--accent);
  color: var(--bg);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 0.7rem;
}
.article-hero h1 { font-size: clamp(2rem, 5vw, 3.25rem); margin-bottom: 1.5rem; max-width: 22ch; }
.article-hero .lede { max-width: 50ch; }

.article-body { padding: clamp(2.5rem, 5vw, 4rem) 0; }
.article-body p { margin-bottom: 1.4rem; font-size: 1.05rem; line-height: 1.75; }
.article-body h2 {
  font-size: 1.7rem;
  margin: 2.5rem 0 1rem;
}
.article-body h3 {
  font-size: 1.25rem;
  margin: 2rem 0 0.75rem;
  font-family: var(--font-sans);
  font-weight: 500;
}
.article-body blockquote {
  border-left: 2px solid var(--accent);
  padding: 0.5rem 0 0.5rem 1.5rem;
  margin: 2rem 0;
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.2rem;
  color: var(--ink-muted);
}
.article-body ul, .article-body ol {
  padding-left: 1.5rem;
  margin-bottom: 1.4rem;
}
.article-body li { margin-bottom: 0.5rem; line-height: 1.7; }
.article-body code {
  background: var(--bg-muted);
  padding: 2px 6px;
  font-size: 0.92em;
  font-family: var(--font-mono);
  border-radius: 2px;
}
.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.92rem;
}
.article-body th, .article-body td {
  text-align: left;
  padding: 0.7rem 0.6rem;
  border-bottom: 1px solid var(--border);
}
.article-body th {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-muted);
  font-weight: 400;
}
.article-disclaimer {
  margin-top: 3rem;
  padding: 1.5rem;
  background: var(--bg-muted);
  border-left: 2px solid var(--border-strong);
  font-size: 0.85rem;
  color: var(--ink-muted);
  line-height: 1.6;
}

/* ---------- Page hero (non-home pages) ---------- */
.page-hero {
  padding: clamp(3rem, 6vw, 5rem) 0;
  border-bottom: 1px solid var(--border);
}
.page-hero .eyebrow { display: block; margin-bottom: 1rem; color: var(--accent); }
.page-hero h1 { font-size: clamp(2.25rem, 5vw, 3.5rem); margin-bottom: 1.5rem; max-width: 18ch; }
.page-hero .lede { max-width: 50ch; }

/* ---------- Research index list ---------- */
.research-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--border);
  margin-top: 2rem;
}
.research-list .article-card {
  background: var(--bg);
  padding: 2rem 1.75rem;
  border-top: none;
}
.filter-row {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 0;
  flex-wrap: wrap;
}
.filter-chip {
  padding: 0.45rem 1rem;
  font-size: 0.82rem;
  border: 1px solid var(--border-strong);
  color: var(--ink-muted);
  background: transparent;
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: all 200ms var(--ease);
}
.filter-chip:hover, .filter-chip.is-active {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
}

/* ---------- Contact page ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}
.contact-block h3 {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-muted);
  font-weight: 400;
  margin-bottom: 0.85rem;
}
.contact-block p { font-size: 1.05rem; margin-bottom: 0.5rem; }
.contact-block a { color: var(--accent); border-bottom: 1px solid var(--accent-soft); padding-bottom: 1px; }
.contact-block a:hover { border-color: var(--accent); }

/* ---------- About page specifics ---------- */
.about-statement {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  line-height: 1.4;
  color: var(--ink);
  max-width: 28ch;
  font-weight: 300;
}
.about-statement em { color: var(--accent); font-style: italic; }

.principles {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2.5rem;
  margin-top: 3rem;
}
.principle {
  border-top: 1px solid var(--border-strong);
  padding-top: 1.5rem;
}
.principle-num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  letter-spacing: 0.08em;
  margin-bottom: 0.85rem;
  display: block;
}
.principle h3 {
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 1.15rem;
  margin-bottom: 0.6rem;
}
.principle p { font-size: 0.95rem; color: var(--ink-muted); line-height: 1.6; }

.founder-detail {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 3rem;
  align-items: start;
  padding: 3rem 0;
  border-top: 1px solid var(--border);
}
.founder-detail:last-of-type { border-bottom: 1px solid var(--border); }
.founder-detail .avatar { width: 140px; height: 140px; font-size: 2.25rem; margin: 0; }
.founder-detail .role { font-size: 0.82rem; }
.founder-detail h3 { font-family: var(--font-serif); font-size: 1.85rem; font-weight: 400; margin-bottom: 0.4rem; }
.founder-detail p { color: var(--ink); font-size: 1rem; line-height: 1.7; margin-bottom: 1rem; max-width: 60ch; }
.founder-detail .credentials {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}
.founder-detail .credentials span {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 4px 10px;
  background: var(--accent-soft);
  color: var(--accent);
  letter-spacing: 0.04em;
}

/* ---------- Animations ---------- */
@keyframes fade-up {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}
.reveal {
  opacity: 0;
  animation: fade-up 700ms var(--ease) forwards;
}
.reveal-delay-1 { animation-delay: 100ms; }
.reveal-delay-2 { animation-delay: 200ms; }
.reveal-delay-3 { animation-delay: 300ms; }
.reveal-delay-4 { animation-delay: 400ms; }

/* ---------- Responsive ---------- */
@media (max-width: 880px) {
  .nav-links { display: none; }
  .nav-links.is-open {
    display: flex;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--bg);
    flex-direction: column;
    padding: 1.5rem var(--gutter);
    border-bottom: 1px solid var(--border);
    gap: 1.25rem;
    align-items: flex-start;
  }
  .nav-toggle { display: flex; }
  .pillars, .feed, .founders, .compare,
  .pricing, .research-list, .principles, .contact-grid {
    grid-template-columns: 1fr;
  }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 2rem; }
  .founder-detail { grid-template-columns: 1fr; gap: 1.5rem; }
  .founder-detail .avatar { width: 96px; height: 96px; font-size: 1.6rem; }
  .newsletter-form { flex-direction: column; }
}
@media (max-width: 480px) {
  .footer-top { grid-template-columns: 1fr; }
  .hero-actions { width: 100%; }
  .hero-actions .btn { flex: 1; justify-content: center; }
}

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