/* ============================================
   NS STUDIO LLC — Design System
   Concept: Editorial, framework-driven, opinionated.
   Deep ink + warm amber + cream paper.
   Inspired by: Stripe Press, Lenny's, Paul Graham essays.
   ============================================ */

/* Fonts: Instrument Serif (display) + Inter (body) + JetBrains Mono (technical accents) */
@import url('https://fonts.googleapis.com/css2?family=Instrument+Serif:ital@0;1&family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root, [data-theme='light'] {
  /* === SURFACES — cream paper === */
  --color-bg: #F4EFE4;          /* warm cream */
  --color-surface: #FAF6EC;      /* lighter cream */
  --color-surface-2: #FFFCF4;    /* near-white cream */
  --color-surface-offset: #ECE5D2;
  --color-surface-offset-2: #E2D9C0;
  --color-surface-dynamic: #DDD3B6;
  --color-divider: #D6CBA8;
  --color-border: #C9BC97;

  /* === INK — deep, warm-leaning charcoal === */
  --color-text: #1A1612;         /* near-black, warm undertone */
  --color-text-muted: #4D453A;
  --color-text-faint: #8B7E68;
  --color-text-inverse: #FAF6EC;

  /* === ACCENT — warm amber/rust === */
  --color-primary: #C44510;      /* rust amber */
  --color-primary-hover: #A8380B;
  --color-primary-active: #8C2D08;
  --color-primary-highlight: #F0D9C2;

  /* Secondary accent — deep ochre */
  --color-accent-2: #8C5A1F;
  --color-accent-2-hover: #6E4517;

  /* States */
  --color-success: #4A6B2A;
  --color-warning: #B8741A;
  --color-error: #9C2A1F;

  /* Chart palette (PG-card-aligned warm spectrum) */
  --chart-1: #C44510;
  --chart-2: #8C5A1F;
  --chart-3: #4A6B2A;
  --chart-4: #1A1612;
  --chart-5: #B8741A;

  /* Radius — restrained, editorial */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 220ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 480ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Shadows — tone-matched to cream */
  --shadow-sm: 0 1px 2px oklch(0.2 0.02 50 / 0.08);
  --shadow-md: 0 4px 16px oklch(0.2 0.02 50 / 0.12);
  --shadow-lg: 0 16px 48px oklch(0.2 0.02 50 / 0.16);
  --shadow-card: 0 1px 0 oklch(0.2 0.02 50 / 0.04), 0 8px 24px oklch(0.2 0.02 50 / 0.08);

  /* Type scale — fluid */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.5rem);
  --text-3xl: clamp(2.5rem, 1rem + 4vw, 5rem);
  --text-hero: clamp(2.75rem, 0.5rem + 6vw, 7rem);

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;
  --content-full: 100%;

  /* Fonts */
  --font-display: 'Instrument Serif', 'Iowan Old Style', Georgia, serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', Menlo, monospace;
}

[data-theme='dark'] {
  --color-bg: #131110;
  --color-surface: #1A1715;
  --color-surface-2: #211E1B;
  --color-surface-offset: #1F1C19;
  --color-surface-offset-2: #2A2622;
  --color-surface-dynamic: #36312C;
  --color-divider: #2A2622;
  --color-border: #3D3731;

  --color-text: #F0E8D8;
  --color-text-muted: #B8AC97;
  --color-text-faint: #6B6253;
  --color-text-inverse: #1A1612;

  --color-primary: #E5651E;
  --color-primary-hover: #F5762E;
  --color-primary-active: #FF8842;
  --color-primary-highlight: #3A2418;

  --color-accent-2: #C28548;
  --color-accent-2-hover: #D69856;

  --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.4);
  --shadow-md: 0 4px 16px oklch(0 0 0 / 0.5);
  --shadow-lg: 0 16px 48px oklch(0 0 0 / 0.6);
  --shadow-card: 0 1px 0 oklch(0 0 0 / 0.3), 0 8px 24px oklch(0 0 0 / 0.4);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #131110;
    --color-surface: #1A1715;
    --color-surface-2: #211E1B;
    --color-surface-offset: #1F1C19;
    --color-surface-offset-2: #2A2622;
    --color-surface-dynamic: #36312C;
    --color-divider: #2A2622;
    --color-border: #3D3731;
    --color-text: #F0E8D8;
    --color-text-muted: #B8AC97;
    --color-text-faint: #6B6253;
    --color-text-inverse: #1A1612;
    --color-primary: #E5651E;
    --color-primary-hover: #F5762E;
    --color-primary-active: #FF8842;
    --color-primary-highlight: #3A2418;
    --color-accent-2: #C28548;
  }
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
.display, .hero h1, h1.display { font-family: var(--font-display); font-weight: 400; letter-spacing: -0.02em; line-height: 1.05; }
.display em, h1 em, h2 em { font-style: italic; color: var(--color-primary); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-primary);
  font-weight: 500;
}

.lede {
  font-size: var(--text-lg);
  line-height: 1.5;
  color: var(--color-text-muted);
  max-width: 60ch;
}

/* ============================================
   LAYOUT PRIMITIVES
   ============================================ */
.container { width: 100%; max-width: var(--content-wide); margin-inline: auto; padding-inline: clamp(var(--space-4), 4vw, var(--space-12)); }
.container--narrow { max-width: var(--content-narrow); }
.container--default { max-width: var(--content-default); }

section { padding-block: clamp(var(--space-16), 8vw, var(--space-32)); }
section.tight { padding-block: clamp(var(--space-12), 5vw, var(--space-20)); }

.grid { display: grid; gap: var(--space-8); }
.grid-2 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr)); }

/* ============================================
   HEADER + NAV
   ============================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: oklch(from var(--color-bg) l c h / 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-interactive), background var(--transition-interactive);
}
.site-header.scrolled {
  border-bottom-color: var(--color-border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-4);
  gap: var(--space-8);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 400;
  letter-spacing: -0.01em;
}
.nav-logo svg { color: var(--color-text); }
.brand-mark { height: 38px; width: auto; display: block; flex-shrink: 0; }
.nav-logo--footer .brand-mark { height: 56px; }
@media (max-width: 880px) { .brand-mark { height: 32px; } }

.nav-links {
  display: flex;
  list-style: none;
  gap: var(--space-6);
  align-items: center;
}
.nav-links a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: 500;
  position: relative;
  white-space: nowrap;
}
@media (max-width: 1080px) {
  .nav-links { gap: var(--space-5); }
  .nav-links a { font-size: 0.8125rem; }
}
.nav-links a:hover, .nav-links a.active { color: var(--color-text); }
.nav-links a.active::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -6px;
  height: 2px;
  background: var(--color-primary);
}

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

.nav-toggle {
  display: none;
  background: none; border: none;
  color: var(--color-text);
  padding: var(--space-2);
  cursor: pointer;
}

@media (max-width: 880px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    flex-direction: column;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-6) var(--space-4);
    gap: var(--space-4);
    align-items: flex-start;
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: inline-flex; }
  .nav-cta .btn-secondary { display: none; }
}

.theme-toggle {
  background: none; border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  width: 36px; height: 36px;
  border-radius: var(--radius-full);
  display: inline-flex; align-items: center; justify-content: center;
}
.theme-toggle:hover { color: var(--color-text); border-color: var(--color-text); }

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  letter-spacing: -0.005em;
}
.btn-primary {
  background: var(--color-primary);
  color: #FFFCF4;
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.btn-secondary {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}
.btn-secondary:hover {
  border-color: var(--color-text);
  background: var(--color-surface-offset);
}
.btn-ghost {
  background: transparent;
  color: var(--color-primary);
  padding: var(--space-2) 0;
}
.btn-ghost:hover { color: var(--color-primary-hover); }
.btn-ghost::after { content: '→'; transition: transform var(--transition-interactive); }
.btn-ghost:hover::after { transform: translateX(4px); }

.btn-lg { padding: var(--space-4) var(--space-8); font-size: var(--text-base); }

/* ============================================
   HERO
   ============================================ */
.hero {
  padding-block: clamp(var(--space-16), 10vw, var(--space-32));
  position: relative;
  overflow: hidden;
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-12);
  align-items: center;
}
@media (min-width: 960px) {
  .hero-grid { grid-template-columns: 1.4fr 1fr; gap: var(--space-16); }
}

.hero-eyebrow { margin-bottom: var(--space-6); display: inline-flex; align-items: center; gap: var(--space-2); }
.hero-eyebrow .pulse {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--color-success);
  box-shadow: 0 0 0 4px oklch(from var(--color-success) l c h / 0.2);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.4; } }

.hero h1 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: var(--text-hero);
  line-height: 1.0;
  letter-spacing: -0.025em;
  margin-bottom: var(--space-6);
}
.hero p.lede {
  font-size: var(--text-lg);
  margin-bottom: var(--space-8);
  max-width: 50ch;
  color: var(--color-text-muted);
}
.hero-cta { display: flex; gap: var(--space-3); flex-wrap: wrap; margin-bottom: var(--space-10); }

.hero-trust {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-6);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-divider);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}
.hero-trust-item { display: flex; align-items: center; gap: var(--space-2); }

/* Hero visual — framework card stack */
.hero-visual {
  position: relative;
  min-height: 560px;
}
.framework-card {
  position: absolute;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-card);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  line-height: 1.7;
  color: var(--color-text);
  width: 82%;
}
.framework-card .tag {
  color: var(--color-primary);
  font-weight: 500;
}
/* Stagger cards vertically so none overlap each other's text */
.framework-card.card-1 { top: 0;     left: 0;  transform: rotate(-3deg); z-index: 1; }
.framework-card.card-2 { top: 38%;   right: 0; transform: rotate(2deg);  z-index: 2; }
.framework-card.card-3 { top: 72%;   left: 6%; transform: rotate(-1deg); z-index: 3; background: var(--color-text); color: var(--color-text-inverse); border-color: var(--color-text); }
.framework-card.card-3 .tag { color: var(--color-primary); }

@media (max-width: 900px) {
  .hero-visual { min-height: 0; display: flex; flex-direction: column; gap: var(--space-4); margin-top: var(--space-8); }
  .framework-card { position: static; width: 100%; transform: none !important; }
}

/* ============================================
   SECTION HEADERS
   ============================================ */
.section-header { margin-bottom: var(--space-12); max-width: 56ch; }
.section-header h2 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: var(--text-2xl);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-top: var(--space-3);
  margin-bottom: var(--space-4);
}
.section-header p { color: var(--color-text-muted); font-size: var(--text-base); }

.section-header.center { margin-inline: auto; text-align: center; }

/* ============================================
   PROBLEM / PAIN SECTION
   ============================================ */
.pain-grid {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
}
.pain-card {
  padding: var(--space-8);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  position: relative;
}
.pain-card .pain-num {
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--text-2xl);
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: var(--space-4);
}
.pain-card h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 400;
  margin-bottom: var(--space-3);
  letter-spacing: -0.01em;
}
.pain-card p { color: var(--color-text-muted); font-size: var(--text-sm); line-height: 1.6; }

/* ============================================
   SERVICES
   ============================================ */
.service-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-8);
  padding: clamp(var(--space-8), 4vw, var(--space-16));
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-xl);
  margin-bottom: var(--space-6);
}
@media (min-width: 720px) {
  .service-card { grid-template-columns: 1fr 1.4fr; align-items: start; gap: var(--space-12); }
}
.service-card .service-meta { font-family: var(--font-mono); font-size: var(--text-xs); text-transform: uppercase; letter-spacing: 0.1em; color: var(--color-primary); margin-bottom: var(--space-3); }
.service-card h3 { font-family: var(--font-display); font-weight: 400; font-size: var(--text-xl); margin-bottom: var(--space-4); letter-spacing: -0.015em; }
.service-card .service-tagline { color: var(--color-text-muted); font-size: var(--text-base); margin-bottom: var(--space-6); }
.service-card .service-detail h4 { font-family: var(--font-body); font-size: var(--text-sm); font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; color: var(--color-text-faint); margin-bottom: var(--space-3); }
.service-card .service-detail ul { list-style: none; margin-bottom: var(--space-6); }
.service-card .service-detail li {
  padding: var(--space-2) 0;
  border-bottom: 1px dashed var(--color-divider);
  font-size: var(--text-sm);
  display: flex;
  gap: var(--space-3);
  color: var(--color-text);
}
.service-card .service-detail li::before { content: '→'; color: var(--color-primary); flex-shrink: 0; }
.service-card .service-detail li:last-child { border-bottom: none; }

/* ============================================
   PRICING
   ============================================ */
.pricing-grid {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
  max-width: var(--content-wide);
  margin-inline: auto;
}
.price-card {
  padding: var(--space-8);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-xl);
  display: flex;
  flex-direction: column;
  position: relative;
}
.price-card.featured {
  background: var(--color-text);
  color: var(--color-text-inverse);
  border-color: var(--color-text);
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}
[data-theme='dark'] .price-card.featured {
  background: var(--color-primary);
  color: #FFFCF4;
  border-color: var(--color-primary);
}
.price-card.featured .price-tier-name,
.price-card.featured h3,
.price-card.featured .price-amount,
.price-card.featured li { color: var(--color-text-inverse); }
[data-theme='dark'] .price-card.featured .price-tier-name,
[data-theme='dark'] .price-card.featured h3,
[data-theme='dark'] .price-card.featured .price-amount,
[data-theme='dark'] .price-card.featured li { color: #FFFCF4; }

.price-card .badge {
  position: absolute;
  top: -12px;
  right: var(--space-6);
  background: var(--color-primary);
  color: #FFFCF4;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-weight: 500;
}
.price-tier-name {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}
.price-card.featured .price-tier-name { color: var(--color-primary-highlight); }
[data-theme='dark'] .price-card.featured .price-tier-name { color: #FFFCF4; opacity: 0.85; }
.price-card h3 { font-family: var(--font-display); font-size: var(--text-xl); font-weight: 400; margin-bottom: var(--space-2); }
.price-amount {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 400;
  margin-bottom: var(--space-1);
  letter-spacing: -0.02em;
}
.price-amount .price-unit { font-size: var(--text-sm); color: var(--color-text-faint); font-family: var(--font-body); }
.price-card.featured .price-amount .price-unit { opacity: 0.7; }
.price-meta { font-size: var(--text-xs); color: var(--color-text-faint); margin-bottom: var(--space-6); font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.05em; }
.price-card.featured .price-meta { opacity: 0.7; }
.price-features { list-style: none; margin-bottom: var(--space-8); flex-grow: 1; }
.price-features li {
  padding: var(--space-2) 0;
  font-size: var(--text-sm);
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  border-bottom: 1px solid oklch(from var(--color-divider) l c h / 0.5);
}
.price-card.featured .price-features li { border-color: oklch(from #FFFCF4 l c h / 0.15); }
.price-features li::before { content: '✓'; color: var(--color-primary); flex-shrink: 0; font-weight: 700; }
.price-card.featured .price-features li::before { color: var(--color-primary-highlight); }
[data-theme='dark'] .price-card.featured .price-features li::before { color: #FFFCF4; }

.price-card .btn { width: 100%; }
.price-card.featured .btn-primary { background: #FFFCF4; color: var(--color-text); border-color: #FFFCF4; }
.price-card.featured .btn-primary:hover { background: var(--color-primary-highlight); border-color: var(--color-primary-highlight); }

/* ============================================
   CASE STUDY HERO
   ============================================ */
.case-hero {
  display: grid;
  gap: var(--space-12);
  grid-template-columns: minmax(0, 1fr);
  align-items: center;
}
@media (min-width: 960px) { .case-hero { grid-template-columns: 1fr 1fr; gap: var(--space-16); } }

.case-meta { font-family: var(--font-mono); font-size: var(--text-xs); text-transform: uppercase; letter-spacing: 0.1em; color: var(--color-primary); margin-bottom: var(--space-4); }
.case-hero h1 { font-family: var(--font-display); font-size: var(--text-2xl); font-weight: 400; line-height: 1.05; margin-bottom: var(--space-6); }

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: var(--space-6);
  padding: var(--space-8);
  background: var(--color-surface-offset);
  border-radius: var(--radius-lg);
  margin-block: var(--space-8);
}
.metric { display: flex; flex-direction: column; gap: var(--space-1); }
.metric-value { font-family: var(--font-display); font-size: var(--text-2xl); color: var(--color-primary); line-height: 1; letter-spacing: -0.02em; }
.metric-label { font-size: var(--text-xs); color: var(--color-text-muted); font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.05em; }

.case-image-card {
  background: var(--color-surface-offset);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  border: 1px solid var(--color-border);
  aspect-ratio: 4/5;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Pull quote */
.pull-quote {
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--text-xl);
  line-height: 1.3;
  color: var(--color-text);
  padding: var(--space-8) 0;
  border-block: 1px solid var(--color-border);
  margin-block: var(--space-12);
  max-width: 50ch;
}
.pull-quote::before { content: '"'; color: var(--color-primary); font-size: 1.5em; line-height: 0; vertical-align: -0.4em; margin-right: 0.05em; }
.pull-quote-attr { display: block; font-family: var(--font-body); font-style: normal; font-size: var(--text-sm); color: var(--color-text-muted); margin-top: var(--space-3); letter-spacing: 0.04em; }

/* ============================================
   FAQ
   ============================================ */
.faq-list { max-width: var(--content-default); margin-inline: auto; }
.faq-item {
  border-bottom: 1px solid var(--color-divider);
  padding-block: var(--space-6);
}
.faq-item summary {
  cursor: pointer;
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 400;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
  letter-spacing: -0.01em;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+';
  color: var(--color-primary);
  font-size: var(--text-xl);
  transition: transform var(--transition-interactive);
  font-family: var(--font-body);
  font-weight: 300;
  flex-shrink: 0;
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item p { color: var(--color-text-muted); margin-top: var(--space-4); font-size: var(--text-base); line-height: 1.7; max-width: 65ch; }

/* ============================================
   BLOG / CARDS
   ============================================ */
.blog-grid { display: grid; gap: var(--space-8); grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr)); }
.blog-card { display: flex; flex-direction: column; text-decoration: none; color: var(--color-text); }
.blog-card-image {
  aspect-ratio: 16/10;
  background: var(--color-surface-offset);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-4);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  transition: transform var(--transition-slow);
}
.blog-card:hover .blog-card-image { transform: translateY(-4px); }
.blog-card-meta { font-family: var(--font-mono); font-size: var(--text-xs); text-transform: uppercase; letter-spacing: 0.08em; color: var(--color-text-muted); margin-bottom: var(--space-2); display: flex; gap: var(--space-3); }
.blog-card-meta .category { color: var(--color-primary); }
.blog-card h3 { font-family: var(--font-display); font-size: var(--text-lg); font-weight: 400; line-height: 1.2; letter-spacing: -0.01em; margin-bottom: var(--space-3); }
.blog-card p { color: var(--color-text-muted); font-size: var(--text-sm); }

/* ============================================
   FORMS
   ============================================ */
.form-group { margin-bottom: var(--space-5); }
.form-label {
  display: block;
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}
.form-input, .form-textarea, .form-select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  color: var(--color-text);
  font-family: var(--font-body);
}
.form-input:focus, .form-textarea:focus, .form-select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px oklch(from var(--color-primary) l c h / 0.18);
}
.form-textarea { min-height: 140px; resize: vertical; }
.form-help { font-size: var(--text-xs); color: var(--color-text-faint); margin-top: var(--space-2); }

.form-card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-xl);
  padding: clamp(var(--space-6), 4vw, var(--space-12));
}

/* ============================================
   LEAD MAGNET / CTA BLOCK
   ============================================ */
.cta-block {
  background: var(--color-text);
  color: var(--color-text-inverse);
  padding: clamp(var(--space-12), 6vw, var(--space-24));
  border-radius: var(--radius-xl);
  display: grid;
  gap: var(--space-8);
  grid-template-columns: minmax(0, 1fr);
  align-items: center;
}
[data-theme='dark'] .cta-block { background: var(--color-primary); color: #FFFCF4; }
@media (min-width: 720px) { .cta-block { grid-template-columns: 1.4fr 1fr; gap: var(--space-12); } }
.cta-block h2 { font-family: var(--font-display); font-size: var(--text-2xl); font-weight: 400; line-height: 1.05; margin-bottom: var(--space-4); color: var(--color-text-inverse); }
[data-theme='dark'] .cta-block h2 { color: #FFFCF4; }
.cta-block p { color: oklch(from var(--color-text-inverse) l c h / 0.75); font-size: var(--text-base); margin-bottom: var(--space-6); }
.cta-block .btn-primary { background: var(--color-primary); border-color: var(--color-primary); color: #FFFCF4; }
.cta-block .btn-primary:hover { background: var(--color-primary-hover); border-color: var(--color-primary-hover); }
[data-theme='dark'] .cta-block .btn-primary { background: #FFFCF4; color: var(--color-text); border-color: #FFFCF4; }

/* ============================================
   FOOTER
   ============================================ */
.site-footer {
  background: var(--color-surface-offset);
  border-top: 1px solid var(--color-divider);
  padding-block: var(--space-16);
  margin-top: var(--space-24);
}
.footer-grid {
  display: grid;
  gap: var(--space-8);
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 200px), 1fr));
  margin-bottom: var(--space-12);
}
.footer-brand { max-width: 32ch; }
.footer-brand p { font-size: var(--text-sm); color: var(--color-text-muted); margin-top: var(--space-4); }
.footer-col h4 {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-faint);
  margin-bottom: var(--space-4);
  font-weight: 500;
}
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: var(--space-2); }
.footer-col a { color: var(--color-text-muted); text-decoration: none; font-size: var(--text-sm); }
.footer-col a:hover { color: var(--color-primary); }
.footer-bottom {
  border-top: 1px solid var(--color-divider);
  padding-top: var(--space-6);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}
.footer-cert {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* ============================================
   PAGE HERO (interior pages)
   ============================================ */
.page-hero { padding-block: clamp(var(--space-16), 8vw, var(--space-24)) clamp(var(--space-12), 6vw, var(--space-20)); }
.page-hero h1 { font-family: var(--font-display); font-weight: 400; font-size: var(--text-2xl); line-height: 1.05; letter-spacing: -0.02em; margin-bottom: var(--space-4); max-width: 24ch; }
.page-hero p { color: var(--color-text-muted); font-size: var(--text-lg); max-width: 60ch; }

/* ============================================
   PROOF STRIP
   ============================================ */
.proof-strip {
  padding-block: var(--space-12);
  border-block: 1px solid var(--color-divider);
  background: var(--color-surface);
}
.proof-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: var(--space-6);
  align-items: center;
}
.proof-item {
  text-align: center;
  padding: var(--space-4);
}
.proof-item .num {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: var(--color-primary);
  line-height: 1;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-2);
}
.proof-item .label {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
}

/* ============================================
   PROCESS / STEPS
   ============================================ */
.process-list { counter-reset: step; max-width: var(--content-default); margin-inline: auto; }
.process-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-6);
  padding-block: var(--space-8);
  border-bottom: 1px solid var(--color-divider);
  align-items: start;
}
.process-item:last-child { border-bottom: none; }
.process-num {
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--text-2xl);
  color: var(--color-primary);
  line-height: 1;
  width: 56px;
}
.process-content h3 { font-family: var(--font-display); font-size: var(--text-lg); font-weight: 400; margin-bottom: var(--space-2); letter-spacing: -0.01em; }
.process-content p { color: var(--color-text-muted); font-size: var(--text-base); }

/* ============================================
   ARTICLE / LONG-FORM
   ============================================ */
.article {
  max-width: 65ch;
  margin-inline: auto;
}
.article h2 { font-family: var(--font-display); font-size: var(--text-xl); font-weight: 400; margin-top: var(--space-12); margin-bottom: var(--space-4); letter-spacing: -0.015em; }
.article h3 { font-family: var(--font-display); font-size: var(--text-lg); font-weight: 400; margin-top: var(--space-8); margin-bottom: var(--space-3); }
.article p { margin-bottom: var(--space-5); font-size: var(--text-base); line-height: 1.75; color: var(--color-text); }
.article ul, .article ol { margin-bottom: var(--space-6); padding-left: var(--space-6); }
.article li { margin-bottom: var(--space-2); line-height: 1.7; }
.article blockquote {
  border-left: 3px solid var(--color-primary);
  padding-left: var(--space-6);
  margin-block: var(--space-8);
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--text-lg);
  color: var(--color-text);
}
.article code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--color-surface-offset);
  padding: 0.1em 0.4em;
  border-radius: var(--radius-sm);
}

/* ============================================
   UTILS
   ============================================ */
.text-center { text-align: center; }
.text-muted { color: var(--color-text-muted); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }
.mt-8 { margin-top: var(--space-8); }
.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }

/* Reveal-on-scroll — only hide if JS is available AND user doesn't prefer reduced motion */
html.js .reveal { opacity: 0; transform: translateY(16px); transition: opacity var(--transition-slow), transform var(--transition-slow); }
html.js .reveal.in { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) { html.js .reveal { opacity: 1; transform: none; } }

/* SVG decorative */
.deco-line {
  height: 1px;
  background: linear-gradient(to right, transparent, var(--color-border), transparent);
  margin-block: var(--space-12);
}

/* ============================================
   CASE STUDY CHARTS — Dreamers
   ============================================ */
.case-data {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}
.chart-card {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}
.chart-eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.chart-eyebrow::before {
  content: "";
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--color-primary);
}
.chart-title {
  font-family: var(--font-serif);
  font-size: var(--text-2xl);
  font-weight: 400;
  line-height: 1.15;
  color: var(--color-text);
  margin: 0;
}
.chart-title em {
  color: var(--color-primary);
  font-style: italic;
}
.chart-caption {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.55;
  margin: 0;
}
.chart-footnote {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-text-faint);
  letter-spacing: 0.04em;
  border-top: 1px dashed var(--color-border);
  padding-top: var(--space-3);
  margin-top: auto;
}
.chart-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}
@media (max-width: 900px) {
  .chart-grid-2 { grid-template-columns: 1fr; }
}

/* Chart SVG common */
.chart-svg { width: 100%; height: auto; display: block; }
.chart-svg text { font-family: var(--font-mono); font-size: 10px; fill: var(--color-text-muted); letter-spacing: 0.04em; }
.chart-svg .axis-label { font-size: 9px; fill: var(--color-text-faint); text-transform: uppercase; letter-spacing: 0.1em; }
.chart-svg .value-label { font-family: var(--font-mono); font-size: 11px; fill: var(--color-text); font-weight: 600; }
.chart-svg .gridline { stroke: var(--color-border); stroke-width: 1; stroke-dasharray: 2 3; }
.chart-svg .baseline { stroke: var(--color-text); stroke-width: 1; }

.chart-legend {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
}
.chart-legend-dot {
  display: inline-block;
  width: 10px; height: 10px; border-radius: 2px;
  margin-right: 6px;
  vertical-align: middle;
}

/* Stack/method tags */
.stack-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--space-4);
}
.stack-card {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-primary);
  border-radius: var(--radius-md);
  padding: var(--space-5);
}
.stack-card .label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}
.stack-card .name {
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  color: var(--color-text);
  margin-bottom: var(--space-2);
  line-height: 1.2;
}
.stack-card .desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* Killed features */
.kill-card {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  position: relative;
  overflow: hidden;
}
.kill-card::before {
  content: "KILLED";
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.15em;
  color: var(--color-primary);
  background: oklch(from var(--color-primary) l c h / 0.1);
  padding: 3px 8px;
  border-radius: 3px;
  border: 1px solid oklch(from var(--color-primary) l c h / 0.3);
}
.kill-card .feature {
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  color: var(--color-text);
  margin-bottom: var(--space-2);
  text-decoration: line-through;
  text-decoration-color: oklch(from var(--color-primary) l c h / 0.5);
  text-decoration-thickness: 2px;
}
.kill-card .reason {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.5;
}
.kill-card .data {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-primary);
  margin-top: var(--space-3);
  letter-spacing: 0.04em;
}

/* Timeline */
.timeline {
  position: relative;
  padding-left: var(--space-8);
}
.timeline::before {
  content: "";
  position: absolute;
  left: 8px; top: 8px; bottom: 8px;
  width: 1px;
  background: var(--color-border);
}
.timeline-row {
  position: relative;
  padding-bottom: var(--space-6);
}
.timeline-row::before {
  content: "";
  position: absolute;
  left: calc(var(--space-8) * -1 + 4px);
  top: 6px;
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--color-bg);
  border: 2px solid var(--color-primary);
}
.timeline-row .week {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  text-transform: uppercase;
  margin-bottom: 4px;
}
.timeline-row .what {
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  color: var(--color-text);
  margin-bottom: 4px;
  line-height: 1.3;
}
.timeline-row .detail {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* Big stat row */
.big-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}
.big-stats > div {
  padding: var(--space-6) var(--space-5);
  border-right: 1px solid var(--color-border);
}
.big-stats > div:last-child { border-right: none; }
.big-stats .num {
  font-family: var(--font-serif);
  font-size: 44px;
  font-weight: 400;
  line-height: 1;
  color: var(--color-primary);
  font-style: italic;
  margin-bottom: var(--space-2);
}
.big-stats .lbl {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  line-height: 1.4;
}
@media (max-width: 900px) {
  .big-stats { grid-template-columns: repeat(2, 1fr); }
  .big-stats > div:nth-child(2) { border-right: none; }
  .big-stats > div:nth-child(1), .big-stats > div:nth-child(2) { border-bottom: 1px solid var(--color-border); }
}
@media (max-width: 500px) {
  .big-stats { grid-template-columns: 1fr; }
  .big-stats > div { border-right: none; border-bottom: 1px solid var(--color-border); }
  .big-stats > div:last-child { border-bottom: none; }
  .big-stats .num { font-size: 36px; }
}

/* ============================================
   RESEARCH PAGE — Calibration Program
   ============================================ */
.research-hero {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-16) 0 var(--space-12);
}
.research-hero .program-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-primary);
  border: 1px solid oklch(from var(--color-primary) l c h / 0.4);
  padding: 6px 12px;
  border-radius: 999px;
  margin-bottom: var(--space-6);
}
.research-hero .program-label::before {
  content: "";
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--color-primary);
  animation: pulse 2.4s infinite ease-out;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}
.research-hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 400;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-6);
}
.research-hero h1 em { color: var(--color-primary); }
.research-hero .lede {
  font-size: var(--text-lg);
  line-height: 1.55;
  color: var(--color-text-muted);
  max-width: 640px;
}

/* Study card */
.study-card {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: var(--space-8);
}
.study-card-header {
  padding: var(--space-8);
  border-bottom: 1px solid var(--color-border);
  background: linear-gradient(to bottom, var(--color-surface), var(--color-surface-2));
}
.study-card-id {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}
.study-card-title {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin-bottom: var(--space-4);
}
.study-card-title em { color: var(--color-primary); font-style: italic; }
.study-card-question {
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  font-style: italic;
  color: var(--color-text);
  border-left: 3px solid var(--color-primary);
  padding-left: var(--space-4);
  line-height: 1.5;
  max-width: 720px;
}
.study-card-body {
  padding: var(--space-8);
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: var(--space-6);
  border-bottom: 1px solid var(--color-border);
}
.study-card-body:last-child { border-bottom: none; }
.study-card-body > .label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  padding-top: 4px;
}
.study-card-body > .content {
  font-size: var(--text-base);
  line-height: 1.65;
  color: var(--color-text);
}
.study-card-body > .content p { margin: 0 0 var(--space-4); }
.study-card-body > .content p:last-child { margin-bottom: 0; }
.study-card-body > .content ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.study-card-body > .content ul li {
  position: relative;
  padding-left: var(--space-5);
  margin-bottom: var(--space-3);
  line-height: 1.55;
}
.study-card-body > .content ul li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.7em;
  width: 12px; height: 1px;
  background: var(--color-primary);
}
.hypothesis-box {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-primary);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  font-family: var(--font-serif);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text);
}
.hypothesis-box strong {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-primary);
  display: block;
  margin-bottom: var(--space-2);
  font-weight: 600;
}
@media (max-width: 720px) {
  .study-card-body { grid-template-columns: 1fr; gap: var(--space-3); }
  .study-card-body > .label { padding-top: 0; }
}

/* Open questions block */
.open-questions {
  background: var(--color-text);
  color: oklch(from var(--color-bg) calc(l + 0.05) c h);
  padding: var(--space-12) 0;
}
.open-questions h2 {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 400;
  line-height: 1.1;
  color: oklch(from var(--color-bg) calc(l + 0.05) c h);
  margin-bottom: var(--space-3);
}
.open-questions h2 em { color: var(--color-primary); font-style: italic; }
.open-questions .lede {
  color: oklch(from var(--color-bg) calc(l - 0.1) c h / 0.7);
  max-width: 640px;
  margin-bottom: var(--space-10);
  line-height: 1.6;
}
.question-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
  counter-reset: q;
}
.question-list .q {
  counter-increment: q;
  padding: var(--space-5) 0;
  border-top: 1px solid oklch(from var(--color-bg) l c h / 0.15);
}
.question-list .q::before {
  content: "Q" counter(q, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.15em;
  color: var(--color-primary);
  display: block;
  margin-bottom: var(--space-2);
}
.question-list .q p {
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  line-height: 1.4;
  color: oklch(from var(--color-bg) l c h / 0.95);
  margin: 0;
}

/* Collaborator block */
.collab-block {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-12) var(--space-10);
  border: 1px solid var(--color-border);
}
.collab-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-8);
  margin-top: var(--space-8);
}
@media (max-width: 720px) {
  .collab-grid { grid-template-columns: 1fr; }
  .collab-block { padding: var(--space-8) var(--space-6); }
}
.collab-card {
  border-left: 2px solid var(--color-primary);
  padding-left: var(--space-5);
}
.collab-card h3 {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  font-weight: 400;
  margin-bottom: var(--space-3);
  line-height: 1.2;
}
.collab-card p { font-size: var(--text-sm); color: var(--color-text-muted); line-height: 1.6; margin-bottom: var(--space-4); }
.collab-card ul { list-style: none; padding: 0; margin: 0 0 var(--space-4) 0; }
.collab-card ul li {
  position: relative;
  padding-left: var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
  line-height: 1.5;
}
.collab-card ul li::before {
  content: "→";
  position: absolute;
  left: 0; top: 0;
  color: var(--color-primary);
  font-family: var(--font-mono);
}

/* Follow links */
.follow-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-5);
  margin-top: var(--space-8);
}
@media (max-width: 600px) { .follow-grid { grid-template-columns: 1fr; } }
.follow-card {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  text-decoration: none;
  color: var(--color-text);
  transition: border-color var(--transition), transform var(--transition);
  display: block;
}
.follow-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-2px);
}
.follow-card .label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}
.follow-card .name {
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  margin-bottom: var(--space-1);
}
.follow-card .desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* Methodology sidebar/inline */
.method-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}
.method-table tr { border-bottom: 1px solid var(--color-border); }
.method-table tr:last-child { border-bottom: none; }
.method-table th, .method-table td {
  padding: var(--space-3) var(--space-2);
  text-align: left;
  vertical-align: top;
  line-height: 1.5;
}
.method-table th {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  width: 40%;
  font-weight: 500;
}
.method-table td { color: var(--color-text); }

/* ============================================
   BRAND SYSTEM v1.0 — Apr 2026
   Additions for the formalized brand language.
   See brand-spec.md for the rulebook.
   ============================================ */

/* ===== Voice card =====
   The italic amber line that frames each page.
   Lives directly below the eyebrow on every non-home page. */
.voice-card {
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--text-lg);
  color: var(--color-primary);
  letter-spacing: -0.005em;
  margin: var(--space-3) 0 var(--space-6);
  line-height: 1.3;
  max-width: 32ch;
}

/* ===== Prompt card — reusable component =====
   The signature visual. Use anywhere we want to stamp the brand.
   Two variants: default (cream surface) and dark (#1A1612).
   Use --rotate on standalone cards only; not in grids. */
.prompt-card {
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-card);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  color: var(--color-text);
  max-width: 480px;
}
.prompt-card pre {
  margin: 0;
  font-family: inherit;
  white-space: pre-wrap;
  overflow-wrap: break-word;
}
.prompt-card code {
  font-family: inherit;
  background: transparent;
  padding: 0;
  color: inherit;
}
.prompt-card .tag {
  color: var(--color-primary);
  font-weight: 500;
}
.prompt-card--dark {
  background: #1A1612;
  border-color: #2A2622;
  color: #F0E8D8;
}
.prompt-card--dark .tag { color: var(--color-primary); }
.prompt-card--rotate-l { transform: rotate(-1.5deg); }
.prompt-card--rotate-r { transform: rotate(1.5deg); }
.prompt-card--inline {
  display: inline-block;
  max-width: 100%;
  margin: var(--space-2) 0;
  font-size: 12px;
}

/* ===== Kill list — signature artifact =====
   Dark card with strikethrough mono items. Used on services,
   in pitch decks, in the field guide. */
.kill-list {
  background: #1A1612;
  border: 1px solid #2A2622;
  border-radius: var(--radius-lg);
  padding: var(--space-8) var(--space-6);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.9;
  color: #F0E8D8;
  list-style: none;
  margin: 0;
  box-shadow: var(--shadow-lg);
}
.kill-list .kill-list-label {
  display: block;
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
  font-weight: 500;
}
.kill-list-items {
  list-style: none;
  margin: 0;
  padding: 0;
}
.kill-list-items li {
  display: flex;
  gap: var(--space-3);
  align-items: baseline;
  padding: var(--space-2) 0;
  border-bottom: 1px dashed #2A2622;
}
.kill-list-items li:last-child { border-bottom: none; }
.kill-list-items .kill-mark {
  color: var(--color-primary);
  font-weight: 600;
  flex-shrink: 0;
}
.kill-list-items .kill-text {
  text-decoration: line-through;
  text-decoration-color: rgba(196, 69, 16, 0.5);
  text-decoration-thickness: 1px;
  color: rgba(240, 232, 216, 0.75);
}
.kill-list-items .kill-reason {
  display: block;
  text-decoration: none;
  color: rgba(240, 232, 216, 0.5);
  font-size: 11px;
  margin-top: 2px;
}

/* ===== <NS /> XML-tag wordmark =====
   Secondary logo for prompt-card-heavy surfaces. */
.ns-wordmark {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
  font-weight: 500;
  white-space: nowrap;
}
.ns-wordmark .tag-bracket { color: var(--color-primary); }
.ns-wordmark .tag-name { color: currentColor; }
.ns-wordmark--lg { font-size: var(--text-xl); }
.ns-wordmark--xl { font-size: var(--text-2xl); }

/* ===== Amber dot separator =====
   A recurring brand element used between identity strings. */
.dot-sep {
  color: var(--color-primary);
  margin: 0 var(--space-2);
  font-weight: 600;
}

/* ===== Field-guide / artifact callout =====
   Used to reference downloadable assets. */
.artifact-callout {
  display: flex;
  gap: var(--space-5);
  align-items: flex-start;
  padding: var(--space-6);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  border-left: 3px solid var(--color-primary);
}
.artifact-callout .artifact-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
  display: block;
}
.artifact-callout h4 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 400;
  margin: 0 0 var(--space-2);
}
.artifact-callout p {
  margin: 0;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  line-height: 1.5;
}

/* ===== Brand-page specific styles ===== */
.brand-swatch {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.brand-swatch-color {
  height: 96px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  position: relative;
}
.brand-swatch-meta {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-text-muted);
}
.brand-swatch-meta strong { color: var(--color-text); font-weight: 500; }

.type-spec {
  padding: var(--space-6);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}
.type-spec-label {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}
.type-spec-sample { line-height: 1.1; margin-bottom: var(--space-2); }
.type-spec-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-text-muted);
}

/* ===== Subtle dot-grid texture overlay (optional) =====
   Apply to dark surfaces for the "Stripe Press paper" feel. */
.dot-grid {
  background-image: radial-gradient(circle, rgba(240, 232, 216, 0.06) 1px, transparent 1px);
  background-size: 24px 24px;
}

/* ===== Banned-word and rule callouts (for /brand page) ===== */
.rule-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.rule-list li {
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-divider);
  display: flex;
  gap: var(--space-3);
  align-items: baseline;
}
.rule-list li:last-child { border-bottom: none; }
.rule-list .rule-yes { color: var(--color-success); font-weight: 600; }
.rule-list .rule-no { color: var(--color-error); font-weight: 600; }

.banned-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}
.banned-word {
  font-family: var(--font-mono);
  font-size: 12px;
  padding: var(--space-1) var(--space-3);
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  text-decoration: line-through;
  text-decoration-color: var(--color-error);
  color: var(--color-text-muted);
}