/* =========================================================
   EMBR SLEEP — Design Tokens & Component Styles
   Ember Health palette: Carbon, Warm Ash, Ember Orange, Oxygen Teal
   ========================================================= */

/* --- GOOGLE FONTS --- */
@import url('https://fonts.googleapis.com/css2?family=Source+Serif+4:ital,opsz,wght@0,8..60,300..700;1,8..60,300..700&family=DM+Sans:ital,wght@0,300;0,400;0,500;0,600;1,300;1,400&display=swap');

/* --- DESIGN TOKENS --- */
:root,
[data-theme='light'] {
  /* Type scale */
  --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);

  /* 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;

  /* Ember Health Palette — Light */
  --color-bg:              #F6F1E8;  /* Warm Ash */
  --color-surface:         #FAF7F2;
  --color-surface-2:       #FFFFFF;
  --color-surface-offset:  #EDE8DF;
  --color-surface-offset-2:#E5DED3;
  --color-surface-dynamic: #DDD6C9;
  --color-divider:         #D4CCBC;
  --color-border:          #C8BFA9;

  --color-text:            #171514;  /* Carbon */
  --color-text-muted:      #6B6660;
  --color-text-faint:      #A8A098;
  --color-text-inverse:    #F6F1E8;

  --color-primary:         #117C80;  /* Oxygen Teal */
  --color-primary-hover:   #0C5E62;
  --color-primary-active:  #094548;
  --color-primary-highlight:#C8DDDE;

  --color-accent:          #F15A24;  /* Ember Orange */
  --color-accent-hover:    #D44B1A;
  --color-accent-muted:    #FDEEE8;

  --color-ember-dark:      #6D2F1E;  /* Burnt Umber */
  --color-sage:            #DDE5DB;  /* Smoke Sage */

  /* UI */
  --color-tag-peer:        #117C80;
  --color-tag-peer-bg:     #E0F0F0;
  --color-tag-inferred:    #6D5A0E;
  --color-tag-inferred-bg: #F5EDD4;
  --color-tag-spec:        #6B6660;
  --color-tag-spec-bg:     #EDEBE6;

  /* Radius */
  --radius-sm:  0.375rem;
  --radius-md:  0.5rem;
  --radius-lg:  0.75rem;
  --radius-xl:  1rem;
  --radius-full:9999px;

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Shadows */
  --shadow-sm: 0 1px 3px oklch(0.2 0.01 60 / 0.07);
  --shadow-md: 0 4px 16px oklch(0.2 0.01 60 / 0.09);
  --shadow-lg: 0 12px 40px oklch(0.2 0.01 60 / 0.12);

  /* Content widths */
  --content-narrow:  640px;
  --content-default: 780px;
  --content-wide:    1100px;

  /* Fonts */
  --font-display: 'Source Serif 4', Georgia, serif;
  --font-body:    'DM Sans', system-ui, sans-serif;
}

[data-theme='dark'],
@media (prefers-color-scheme: dark) { :root:not([data-theme]) {
  --color-bg:              #171514;
  --color-surface:         #1D1B1A;
  --color-surface-2:       #222020;
  --color-surface-offset:  #1A1918;
  --color-surface-offset-2:#1F1E1C;
  --color-surface-dynamic: #2C2A28;
  --color-divider:         #2A2826;
  --color-border:          #3A3835;

  --color-text:            #EDE8DF;
  --color-text-muted:      #8A8480;
  --color-text-faint:      #5A5855;
  --color-text-inverse:    #171514;

  --color-primary:         #4FA8AD;
  --color-primary-hover:   #2C8F95;
  --color-primary-active:  #1A6E73;
  --color-primary-highlight:#1E3638;

  --color-accent:          #F47040;
  --color-accent-hover:    #D85F30;
  --color-accent-muted:    #3A2418;

  --color-ember-dark:      #A06048;
  --color-sage:            #2E3530;

  --color-tag-peer:        #4FA8AD;
  --color-tag-peer-bg:     #1A3436;
  --color-tag-inferred:    #C8A840;
  --color-tag-inferred-bg: #2E2610;
  --color-tag-spec:        #8A8480;
  --color-tag-spec-bg:     #272523;

  --shadow-sm: 0 1px 3px oklch(0 0 0 / 0.22);
  --shadow-md: 0 4px 16px oklch(0 0 0 / 0.32);
  --shadow-lg: 0 12px 40px oklch(0 0 0 / 0.42);
}}

[data-theme='dark'] {
  --color-bg:              #171514;
  --color-surface:         #1D1B1A;
  --color-surface-2:       #222020;
  --color-surface-offset:  #1A1918;
  --color-surface-offset-2:#1F1E1C;
  --color-surface-dynamic: #2C2A28;
  --color-divider:         #2A2826;
  --color-border:          #3A3835;
  --color-text:            #EDE8DF;
  --color-text-muted:      #8A8480;
  --color-text-faint:      #5A5855;
  --color-text-inverse:    #171514;
  --color-primary:         #4FA8AD;
  --color-primary-hover:   #2C8F95;
  --color-primary-active:  #1A6E73;
  --color-primary-highlight:#1E3638;
  --color-accent:          #F47040;
  --color-accent-hover:    #D85F30;
  --color-accent-muted:    #3A2418;
  --color-ember-dark:      #A06048;
  --color-sage:            #2E3530;
  --color-tag-peer:        #4FA8AD;
  --color-tag-peer-bg:     #1A3436;
  --color-tag-inferred:    #C8A840;
  --color-tag-inferred-bg: #2E2610;
  --color-tag-spec:        #8A8480;
  --color-tag-spec-bg:     #272523;
  --shadow-sm: 0 1px 3px oklch(0 0 0 / 0.22);
  --shadow-md: 0 4px 16px oklch(0 0 0 / 0.32);
  --shadow-lg: 0 12px 40px oklch(0 0 0 / 0.42);
}

/* =========================================================
   LAYOUT UTILITIES
   ========================================================= */
.container {
  width: 100%;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: clamp(var(--space-6), 5vw, var(--space-16));
}
.container--narrow {
  max-width: var(--content-default);
}
.section {
  padding-block: clamp(var(--space-12), 8vw, var(--space-24));
}
.section--alt {
  background: var(--color-surface);
}
.section--tint {
  background: var(--color-surface-offset);
}

/* =========================================================
   HEADER
   ========================================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-divider);
  backdrop-filter: blur(8px);
  background: color-mix(in oklab, var(--color-bg) 92%, transparent);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
  height: 64px;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: clamp(var(--space-6), 5vw, var(--space-16));
}
.site-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-base);
  letter-spacing: -0.01em;
}
.site-logo__mark {
  width: 28px;
  height: 28px;
  color: var(--color-primary);
  flex-shrink: 0;
}
.site-logo:hover { color: var(--color-primary); }

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}
.site-nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  list-style: none;
}
.site-nav__link {
  text-decoration: none;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.01em;
}
.site-nav__link:hover { color: var(--color-text); }
.site-nav__link--active { color: var(--color-primary); }

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--color-primary);
  color: var(--color-text-inverse) !important;
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
}
.nav-cta:hover { background: var(--color-primary-hover); }

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  background: transparent;
  border: 1px solid var(--color-border);
  flex-shrink: 0;
}
.theme-toggle:hover { color: var(--color-text); background: var(--color-surface-offset); }

/* Mobile nav */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
}
.hamburger span {
  display: block;
  width: 18px;
  height: 1.5px;
  background: currentColor;
  border-radius: 2px;
  transition: all 0.2s;
}

@media (max-width: 768px) {
  .hamburger { display: flex; }
  .site-nav {
    display: none;
    position: absolute;
    top: 65px;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-divider);
    padding: var(--space-6);
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-4);
    z-index: 99;
    box-shadow: var(--shadow-md);
  }
  .site-nav.is-open { display: flex; }
  .site-nav__list { flex-direction: column; gap: var(--space-3); }
  .site-nav__link { font-size: var(--text-base); }
}

/* =========================================================
   HERO
   ========================================================= */
.hero {
  padding-block: clamp(var(--space-16), 12vw, var(--space-32));
  background: var(--color-bg);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 60% 50%, color-mix(in oklab, var(--color-primary) 6%, transparent) 0%, transparent 70%);
  pointer-events: none;
}
.hero__inner {
  position: relative;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: clamp(var(--space-6), 5vw, var(--space-16));
  display: grid;
  grid-template-columns: 1fr;
  max-width: var(--content-default);
}
.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-6);
}
.hero__eyebrow::before {
  content: '';
  display: block;
  width: 24px;
  height: 1.5px;
  background: var(--color-accent);
  border-radius: 2px;
}
.hero__title {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 300;
  color: var(--color-text);
  line-height: 1.1;
  margin-bottom: var(--space-8);
  letter-spacing: -0.02em;
}
.hero__title em {
  font-style: italic;
  color: var(--color-primary);
}
.hero__lede {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-10);
  max-width: 60ch;
}
.hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  align-items: center;
  margin-bottom: var(--space-10);
}
.hero__meta-item {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.hero__meta-item:not(:last-child)::after {
  content: '·';
  margin-left: var(--space-4);
  color: var(--color-border);
}
.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  align-items: center;
}

/* =========================================================
   BUTTONS
   ========================================================= */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-interactive);
}
.btn--primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border: 1.5px solid transparent;
}
.btn--primary:hover { background: var(--color-primary-hover); }
.btn--ghost {
  background: transparent;
  color: var(--color-text-muted);
  border: 1.5px solid var(--color-border);
}
.btn--ghost:hover { color: var(--color-text); border-color: var(--color-text-muted); background: var(--color-surface-offset); }

/* =========================================================
   SECTION HEADER
   ========================================================= */
.section-header {
  margin-bottom: var(--space-12);
  max-width: var(--content-default);
  margin-inline: auto;
  text-align: center;
}
.section-header--left {
  text-align: left;
  margin-inline: 0;
}
.section-eyebrow {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-3);
}
.section-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 300;
  color: var(--color-text);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-5);
}
.section-lede {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* =========================================================
   PILLARS / FEATURE CARDS
   ========================================================= */
.pillars {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
  max-width: var(--content-wide);
  margin-inline: auto;
}
.pillar {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  padding: var(--space-8);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-xl);
  text-decoration: none;
  color: inherit;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-interactive);
}
.pillar:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.pillar__number {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
}
.pillar__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--color-text);
  line-height: 1.3;
}
.pillar__description {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
  flex: 1;
}
.pillar__link {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
}
.pillar__link::after { content: ' →'; }

/* =========================================================
   METHODOLOGY TAGS
   ========================================================= */
.methodology {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-6);
  max-width: var(--content-wide);
  margin-inline: auto;
}
.method-tag {
  padding: var(--space-8);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-divider);
}
.method-tag--peer { border-color: var(--color-tag-peer); background: var(--color-tag-peer-bg); }
.method-tag--inferred { border-color: color-mix(in oklab, var(--color-tag-inferred) 30%, transparent); background: var(--color-tag-inferred-bg); }
.method-tag--speculation { border-color: var(--color-border); background: var(--color-tag-spec-bg); }
.method-tag__label {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: var(--space-3);
}
.method-tag--peer .method-tag__label { color: var(--color-tag-peer); }
.method-tag--inferred .method-tag__label { color: var(--color-tag-inferred); }
.method-tag--speculation .method-tag__label { color: var(--color-tag-spec); }
.method-tag__title {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 600;
  margin-bottom: var(--space-3);
  color: var(--color-text);
}
.method-tag__description {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* =========================================================
   ESSAY CARDS (HOMEPAGE)
   ========================================================= */
.essays {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-6);
  max-width: var(--content-wide);
  margin-inline: auto;
}
.essay-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  padding: var(--space-8);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-xl);
  text-decoration: none;
  color: inherit;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-interactive);
}
.essay-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.essay-card--featured {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-10);
  align-items: center;
  background: var(--color-surface-2);
  border-color: var(--color-primary-highlight);
}
@media (max-width: 640px) {
  .essay-card--featured { grid-template-columns: 1fr; }
}
.essay-card__pillar {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
}
.essay-card__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--color-text);
  line-height: 1.3;
}
.essay-card--featured .essay-card__title {
  font-size: var(--text-xl);
}
.essay-card__excerpt {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
  flex: 1;
}
.essay-card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  font-weight: 500;
}
.essay-card__meta-divider {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--color-text-faint);
  flex-shrink: 0;
}
.essay-card__read-more {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  margin-top: auto;
}
.essay-card__read-more:hover { color: var(--color-primary-hover); }

/* Diagram in featured card */
.essay-diagram {
  background: var(--color-surface-offset);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  display: flex;
  align-items: center;
  justify-content: center;
  aspect-ratio: 4/3;
}
.essay-diagram svg {
  max-width: 300px;
  width: 100%;
}

/* =========================================================
   NEWSLETTER BANNER
   ========================================================= */
.newsletter {
  background: var(--color-text);
  color: var(--color-text-inverse);
  padding-block: clamp(var(--space-12), 8vw, var(--space-20));
}
[data-theme='dark'] .newsletter {
  background: var(--color-surface-offset);
  color: var(--color-text);
}
.newsletter__inner {
  max-width: 600px;
  margin-inline: auto;
  padding-inline: clamp(var(--space-6), 5vw, var(--space-16));
  text-align: center;
}
.newsletter__eyebrow {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}
.newsletter__title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 300;
  line-height: 1.2;
  margin-bottom: var(--space-5);
  color: inherit;
  letter-spacing: -0.02em;
}
[data-theme='dark'] .newsletter__title { color: var(--color-text); }
.newsletter__description {
  font-size: var(--text-sm);
  opacity: 0.75;
  line-height: 1.65;
  margin-bottom: var(--space-8);
  max-width: 48ch;
  margin-inline: auto;
}
[data-theme='dark'] .newsletter__description { opacity: 1; color: var(--color-text-muted); }
.newsletter__form {
  display: flex;
  gap: var(--space-3);
  max-width: 420px;
  margin-inline: auto;
}
.newsletter__input {
  flex: 1;
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-md);
  border: 1.5px solid transparent;
  background: rgba(255,255,255,0.12);
  color: inherit;
  font-size: var(--text-sm);
  outline: none;
}
[data-theme='dark'] .newsletter__input {
  background: var(--color-surface-2);
  border-color: var(--color-border);
  color: var(--color-text);
}
.newsletter__input:focus {
  border-color: var(--color-primary);
  background: rgba(255,255,255,0.18);
}
[data-theme='dark'] .newsletter__input:focus { background: var(--color-surface-offset); }
.newsletter__input::placeholder { opacity: 0.6; }
.newsletter__submit {
  padding: var(--space-3) var(--space-6);
  background: var(--color-accent);
  color: white;
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
  border: none;
  cursor: pointer;
  white-space: nowrap;
  transition: background var(--transition-interactive);
}
.newsletter__submit:hover { background: var(--color-accent-hover); }
.newsletter__note {
  font-size: var(--text-xs);
  opacity: 0.5;
  margin-top: var(--space-4);
}
[data-theme='dark'] .newsletter__note { color: var(--color-text-faint); opacity: 1; }
@media (max-width: 480px) {
  .newsletter__form { flex-direction: column; }
  .newsletter__submit { width: 100%; justify-content: center; }
}

/* =========================================================
   FOOTER
   ========================================================= */
.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-divider);
  padding-block: clamp(var(--space-12), 6vw, var(--space-20));
}
.site-footer__inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-10);
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: clamp(var(--space-6), 5vw, var(--space-16));
  margin-bottom: var(--space-12);
}
@media (max-width: 768px) {
  .site-footer__inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
  .site-footer__inner { grid-template-columns: 1fr; }
}
.site-footer__brand-mark {
  width: 28px;
  height: 28px;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}
.site-footer__brand-name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-base);
  color: var(--color-text);
  display: block;
  margin-bottom: var(--space-3);
}
.site-footer__brand-line {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
  max-width: 34ch;
}
.site-footer__col-title {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  margin-bottom: var(--space-4);
}
.site-footer__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.site-footer__list a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
}
.site-footer__list a:hover { color: var(--color-text); }
.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  justify-content: space-between;
  padding-inline: clamp(var(--space-6), 5vw, var(--space-16));
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-divider);
  max-width: var(--content-wide);
  margin-inline: auto;
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

/* =========================================================
   ARTICLE PAGE
   ========================================================= */
.article-header {
  padding-block: clamp(var(--space-12), 8vw, var(--space-20));
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-divider);
}
.article-header__inner {
  max-width: var(--content-default);
  margin-inline: auto;
  padding-inline: clamp(var(--space-6), 5vw, var(--space-16));
}
.article-breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}
.article-breadcrumb a {
  color: var(--color-text-muted);
  text-decoration: none;
}
.article-breadcrumb a:hover { color: var(--color-primary); }
.article-breadcrumb__sep { color: var(--color-border); }
.article-pillar {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-5);
}
.article-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 300;
  color: var(--color-text);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-6);
}
.article-lede {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-8);
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-4);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-divider);
}
.article-meta span { font-weight: 500; }

/* Article body */
.article-body {
  padding-block: clamp(var(--space-10), 6vw, var(--space-16));
}
.article-body__inner {
  max-width: var(--content-default);
  margin-inline: auto;
  padding-inline: clamp(var(--space-6), 5vw, var(--space-16));
}
.article-content {
  font-size: var(--text-base);
  line-height: 1.8;
  color: var(--color-text);
}
.article-content p {
  margin-bottom: var(--space-6);
  max-width: 70ch;
}
.article-content h2 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 400;
  color: var(--color-text);
  margin-top: var(--space-12);
  margin-bottom: var(--space-5);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-divider);
  letter-spacing: -0.01em;
  line-height: 1.2;
}
.article-content h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-top: var(--space-8);
  margin-bottom: var(--space-4);
  line-height: 1.3;
}
.article-content ul,
.article-content ol {
  padding-left: var(--space-6);
  margin-bottom: var(--space-6);
}
.article-content li {
  margin-bottom: var(--space-3);
  line-height: 1.7;
  max-width: 68ch;
}
.article-content strong { font-weight: 600; color: var(--color-text); }
.article-content a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.article-content a:hover { color: var(--color-primary-hover); }
.article-content hr {
  border: none;
  border-top: 1px solid var(--color-divider);
  margin-block: var(--space-10);
}
.article-content em { font-style: italic; }

/* Evidence tags inline */
.tag-peer, .tag-inferred, .tag-spec {
  display: inline;
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 0.1em 0.5em;
  border-radius: var(--radius-sm);
  vertical-align: middle;
  margin-left: 0.25em;
}
.tag-peer { background: var(--color-tag-peer-bg); color: var(--color-tag-peer); }
.tag-inferred { background: var(--color-tag-inferred-bg); color: var(--color-tag-inferred); }
.tag-spec { background: var(--color-tag-spec-bg); color: var(--color-tag-spec); }

/* Callout box */
.callout {
  background: var(--color-primary-highlight);
  border-left: 3px solid var(--color-primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: var(--space-5) var(--space-6);
  margin-block: var(--space-8);
}
.callout p { color: var(--color-text); margin-bottom: 0; }

/* Citations */
.citations {
  margin-top: var(--space-12);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-divider);
}
.citations__title {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  margin-bottom: var(--space-5);
}
.citations__list {
  list-style: decimal;
  padding-left: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.citations__list li {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.55;
}
.citations__list a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
  word-break: break-all;
}

/* =========================================================
   SOCIAL SHARE
   ========================================================= */
.social-share {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
  padding: var(--space-6) 0;
  border-top: 1px solid var(--color-divider);
  border-bottom: 1px solid var(--color-divider);
  margin-block: var(--space-8);
}
.social-share__label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-faint);
}
.social-share__btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  font-size: var(--text-xs);
  font-weight: 600;
  text-decoration: none;
  color: var(--color-text-muted);
  background: var(--color-surface);
  transition: all var(--transition-interactive);
}
.social-share__btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-highlight);
}
.social-share__btn svg { width: 14px; height: 14px; flex-shrink: 0; }

/* =========================================================
   COMMENTS SECTION
   ========================================================= */
.comments-section {
  padding-top: var(--space-10);
  margin-top: var(--space-10);
  border-top: 1px solid var(--color-divider);
}
.comments-section__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: var(--space-6);
}

/* =========================================================
   DISCLOSURE / ABOUT PAGE
   ========================================================= */
.disclosure-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  margin-top: var(--space-8);
}
.disclosure-item {
  display: flex;
  gap: var(--space-5);
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
}
.disclosure-bullet {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
  flex-shrink: 0;
  margin-top: 0.6em;
}
.disclosure-text {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
}
.disclosure-text strong { color: var(--color-text); }

/* =========================================================
   SCORING TABLE
   ========================================================= */
.scoring-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
  margin-top: var(--space-6);
}
.scoring-table th {
  text-align: left;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-divider);
}
.scoring-table td {
  padding: var(--space-4);
  border-bottom: 1px solid var(--color-divider);
  color: var(--color-text-muted);
  vertical-align: top;
}
.scoring-table tr:hover td { background: var(--color-surface-offset); }
.scoring-table__brand { font-weight: 600; color: var(--color-text); margin-bottom: var(--space-1); }
.scoring-table__model { font-size: var(--text-xs); color: var(--color-text-faint); }
.score-pill {
  display: inline-flex;
  align-items: center;
  padding: 0.2em 0.7em;
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 700;
  white-space: nowrap;
}
.score-pill--high { background: var(--color-tag-peer-bg); color: var(--color-tag-peer); }
.score-pill--mid { background: var(--color-tag-inferred-bg); color: var(--color-tag-inferred); }
.score-pill--low { background: var(--color-accent-muted); color: var(--color-accent); }

/* =========================================================
   ABOUT / FOUNDER SECTION
   ========================================================= */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: center;
}
@media (max-width: 640px) {
  .about-grid { grid-template-columns: 1fr; }
}
.about-text h2 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 300;
  color: var(--color-text);
  margin-bottom: var(--space-5);
  letter-spacing: -0.02em;
}
.about-text p {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.75;
  margin-bottom: var(--space-5);
}
.about-visual {
  aspect-ratio: 4/3;
  background: var(--color-surface-offset);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-divider);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.about-visual svg { width: 80%; max-width: 300px; opacity: 0.4; }

/* =========================================================
   PAGE HERO (inner pages)
   ========================================================= */
.page-hero {
  padding-block: clamp(var(--space-12), 8vw, var(--space-20));
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-divider);
}
.page-hero__inner {
  max-width: var(--content-default);
  margin-inline: auto;
  padding-inline: clamp(var(--space-6), 5vw, var(--space-16));
}
.page-hero__eyebrow {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}
.page-hero__title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 300;
  color: var(--color-text);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-5);
}
.page-hero__lede {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* =========================================================
   UTILITY
   ========================================================= */
.text-accent { color: var(--color-accent); }
.text-primary { color: var(--color-primary); }
.text-muted { color: var(--color-text-muted); }
.font-display { font-family: var(--font-display); }
.mt-auto { margin-top: auto; }

.commitment-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
  text-decoration: none;
}
.commitment-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
  flex-shrink: 0;
}