@import url('https://fonts.googleapis.com/css2?family=Bebas+Neue&family=DM+Sans:opsz,wght@9..40,300;9..40,400;9..40,500;9..40,600&family=DM+Serif+Display&display=swap');

:root {
  /* ── Legacy tokens (kept for backward compat with existing pages) ── */
  --bg:     #ffffff;
  --bg2:    #fafafa;
  --bg3:    #f5f5f5;
  --text:   #111111;
  --muted:  #999999;
  --border: #e8e8e8;
  --blue:   #0066cc; /* legacy alias — use --color-citation for new code */

  /* ── Color ── */
  --color-white:      #ffffff;
  --color-black:      #111111;
  --color-grey-dark:  #999999;
  --color-grey-light: #bbbbbb;
  --color-border:     #ececec;
  --color-citation:   #0066cc; /* reserved exclusively for citation links, nowhere else */

  /* ── Type ── */
  --font-display: "DM Sans", sans-serif;
  --font-body:    "DM Sans", sans-serif;
  --font-accent:  "DM Serif Display", serif;

  /* ── Spacing scale — 8px base rhythm ── */
  --space-1: 0.5rem;   /* 8px  */
  --space-2: 1rem;     /* 16px */
  --space-3: 1.5rem;   /* 24px */
  --space-4: 2rem;     /* 32px */
  --space-5: 3rem;     /* 48px */
  --space-6: 4rem;     /* 64px */
  --space-7: 6rem;     /* 96px */
  --space-8: 8rem;     /* 128px */

  /* ── Layout ── */
  --max-width: 1200px;
  --nav-inset: var(--space-4);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  overflow-x: hidden;
  max-width: 100%;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  max-width: 100%;
}

a, a:link, a:visited { color: inherit; text-decoration: none; }
a:hover { text-decoration: none; }

img, svg, video, iframe { display: block; max-width: 100%; height: auto; }

/* Any table wrapped in this gets its own horizontal scroll instead of
   breaking the page layout on narrow screens */
.table-scroll-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

/* ── LAYOUT CONTAINER ── */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--nav-inset);
}

@media (max-width: 640px) {
  .container { padding: 0 var(--space-3); }
}

/* ── SOCIAL STRIP ── */
.social-strip {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  padding: 10px 2.5rem;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
}

.s-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--muted);
  cursor: pointer;
  background: none;
  border: none;
  transition: color 0.15s;
  font-family: var(--font-body);
}

.s-btn:hover { color: var(--text); }
.s-btn svg { width: 13px; height: 13px; flex-shrink: 0; }

/* ── NAV (legacy — used by existing pages until Step 1 migration) ── */
nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem 2.5rem;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 100;
}

.nav-logo {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: 1.5rem;
  letter-spacing: 0.1em;
  color: var(--text);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a,
.nav-links a:link,
.nav-links a:visited {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: 0.95rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.15s;
}

.nav-links a:hover,
.nav-links a.active { color: var(--text); }

/* ── SITE NAV (edge-tucked — new pattern for Step 1) ── */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: var(--nav-inset);
  pointer-events: none;
  background: transparent;
}

.site-nav__mark,
.site-nav__links,
.site-nav__meta {
  pointer-events: auto;
}

.site-nav__mark {
  font-family: var(--font-body);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-black);
  text-decoration: none;
}

.site-nav__links {
  display: flex;
  gap: var(--space-3);
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav__links a {
  font-family: var(--font-body);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-black);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.15s ease;
}

.site-nav__links a:hover {
  border-bottom-color: var(--color-black);
}

@media (max-width: 640px) {
  .site-nav__links { display: none; }
  .site-nav { padding: var(--space-3); }

  .site-nav__toggle {
    display: block;
    position: relative;
    z-index: 201;
    pointer-events: auto;
    background: none;
    border: none;
    font-family: var(--font-body);
    font-size: 0.7rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    cursor: pointer;
  }

  .site-nav__overlay {
    position: fixed;
    inset: 0;
    background: var(--color-white);
    z-index: 200;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: var(--space-4);
    transform: translateY(-100%);
    transition: transform 0.25s ease;
    pointer-events: auto;
  }

  .site-nav__overlay.is-open { transform: translateY(0); }

  .site-nav__overlay a {
    font-family: var(--font-display);
    font-weight: 300;
    font-size: 1.75rem;
    letter-spacing: 0.02em;
    color: var(--color-black);
    text-decoration: none;
    display: block;
    padding: 12px 0;
    min-height: 44px;
    box-sizing: border-box;
  }
}

@media (min-width: 641px) {
  .site-nav__toggle,
  .site-nav__overlay { display: none; }
}

/* ── FOOTER ── */
footer {
  border-top: 1px solid var(--border);
  padding: 2rem 2.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 0;
}

.footer-logo {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: 1rem;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.footer-note {
  font-size: 0.7rem;
  color: var(--color-grey-light);
  letter-spacing: 0.03em;
}

/* ── SECTION LABEL ── */
.section-label {
  font-family: var(--font-display);
  font-size: 0.65rem;
  letter-spacing: 0.22em;
  color: var(--muted);
  text-transform: uppercase;
  margin-bottom: 1rem;
}

/* ── TAGS ── */
.tag {
  display: inline-block;
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.2rem 0.6rem;
  border: 1px solid var(--border);
  color: var(--muted);
}

/* ── GRIDS ── */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--border); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--border); }

@media (max-width: 900px) { .grid-3 { grid-template-columns: repeat(2, 1fr); } }

@media (max-width: 640px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  nav { padding: 1rem 1.2rem; }
  .nav-links { gap: 1rem; }
  /* Multi-column grids stack by default on mobile */
  .grid,
  .card-grid,
  [class*="-grid"] { grid-template-columns: 1fr !important; }
}

/* ── POST CARD ── */
.post-card {
  background: var(--bg);
  padding: 1.6rem;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  transition: background 0.15s;
  cursor: pointer;
}

.post-card:hover { background: var(--bg2); }

.post-card .card-meta {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  font-size: 0.7rem;
  color: var(--muted);
}

.post-card h3 {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: 1.1rem;
  letter-spacing: 0.03em;
  line-height: 1.25;
  color: var(--text);
}

.post-card p {
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.6;
}

.post-card .read-link {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-top: auto;
}

/* ── VIDEO CARD ── */
.video-card {
  background: var(--bg);
  display: flex;
  flex-direction: column;
  gap: 0;
}

.video-card .embed-wrap {
  position: relative;
  padding-bottom: 56.25%;
  background: var(--bg3);
  border-bottom: 1px solid var(--border);
}

.video-card .embed-wrap iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: none;
}

.video-card .vid-info { padding: 1.2rem; }

.video-card h3 {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: 1rem;
  letter-spacing: 0.03em;
  color: var(--text);
  line-height: 1.25;
  margin-bottom: 4px;
}

.video-card .card-meta {
  font-size: 0.7rem;
  color: var(--muted);
}

/* ── COMPOUND CARD ── */
.compound-card {
  background: var(--bg);
  padding: 1.6rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  transition: background 0.15s;
  cursor: pointer;
}

.compound-card:hover { background: var(--bg2); }

.compound-card .compound-name {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: 1.35rem;
  letter-spacing: 0.04em;
  color: var(--text);
}

.compound-card p {
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.55;
}

/* ── SOURCE ROW ── */
.source-group { margin-bottom: 2.5rem; }

.source-group-title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  color: var(--muted);
  text-transform: uppercase;
  margin-bottom: 0;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--border);
}

.source-item {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1.5rem;
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.83rem;
}

.source-item .source-title { color: var(--text); flex: 1; line-height: 1.5; }
.source-item .source-journal { font-size: 0.7rem; color: var(--muted); margin-top: 2px; }

.source-item a {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-citation);
  white-space: nowrap;
  flex-shrink: 0;
  padding-top: 3px;
}

.source-item a:hover { text-decoration: underline; }

/* ── PAGE WRAPPER ── */
.page-wrap { max-width: 1100px; margin: 0 auto; padding: 3.5rem 2.5rem; }
.page-wrap.narrow { max-width: 720px; padding: 3.5rem 2rem; }

/* ── HERO ── */
.hero {
  padding: var(--space-8) var(--nav-inset) var(--space-6);
  max-width: var(--max-width);
  margin: 0 auto;
}

.hero__eyebrow {
  font-family: var(--font-body);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-grey-dark);
  margin-bottom: var(--space-3);
}

.hero__title {
  font-family: var(--font-display);
  font-weight: 300;
  margin: 0;
  line-height: 1.05;
}

.hero__lede {
  font-family: var(--font-body);
  color: var(--color-grey-dark);
  max-width: 42ch;
  margin-top: var(--space-3);
}

@media (max-width: 640px) {
  .hero { padding: var(--space-7) var(--space-3) var(--space-5); }
  .hero__lede { max-width: 100%; }
}

/* ── POST BODY ── */
.post-back {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 2rem;
  transition: color 0.15s;
}

.post-back:hover { color: var(--text); }

.post-body h2 {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: 1rem;
  letter-spacing: 0.12em;
  color: var(--text);
  margin: 2.2rem 0 0.7rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.post-body h3 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
  margin: 1.5rem 0 0.5rem;
}

.post-body p {
  font-size: 0.92rem;
  color: #444;
  line-height: 1.85;
  margin-bottom: 1rem;
}

.key-box {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-left: 2px solid var(--text);
  padding: 1rem 1.3rem;
  margin: 1.5rem 0;
}

.key-box .key-label {
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text);
  margin-bottom: 0.4rem;
}

.key-box p { font-size: 0.94rem; color: #666; margin: 0; line-height: 1.65; }

.warn-box {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-left: 2px solid var(--muted);
  padding: 1rem 1.3rem;
  margin: 1.5rem 0;
}

.warn-box .warn-label {
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.4rem;
}

.warn-box p { font-size: 0.94rem; color: #666; margin: 0; line-height: 1.65; }

.video-callout {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  background: var(--bg2);
  border: 1px solid var(--border);
  padding: 0.9rem 1.2rem;
  margin-bottom: 2.5rem;
  font-size: 0.85rem;
  color: var(--muted);
}

.video-callout a { color: var(--text); font-weight: 600; text-decoration: underline; }

/* Citation links — the only place blue appears on the site */
.cite { color: var(--color-citation); font-size: 0.78em; vertical-align: super; font-weight: 600; }

.citation,
sup.citation-marker a {
  color: var(--color-citation);
  text-decoration: none;
  border-bottom: 1px solid var(--color-citation);
}

.references { margin-top: 2.5rem; padding-top: 1.5rem; border-top: 1px solid var(--border); }
.references h2 { font-family: var(--font-display); font-size: 0.75rem; letter-spacing: 0.18em; color: var(--muted); margin-bottom: 0.8rem; font-weight: 300; }
.references ol { list-style: decimal; padding-left: 1.3rem; }
.references ol li { font-size: 0.74rem; color: var(--muted); line-height: 1.6; margin-bottom: 0.4rem; word-break: break-word; }
.references ol li a { color: var(--color-citation); word-break: break-word; }
.references ol li a:hover { text-decoration: underline; }

/* ── DRUG TABLE ── */
.drug-table { width: 100%; border-collapse: collapse; margin: 1.2rem 0; font-size: 0.8rem; }
.drug-table th { font-family: var(--font-display); font-size: 0.65rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); text-align: left; padding: 0.5rem 0.8rem; border-bottom: 1px solid var(--border); font-weight: 300; }
.drug-table td { color: #444; padding: 0.7rem 0.8rem; border-bottom: 1px solid var(--border); line-height: 1.5; vertical-align: top; }
.drug-table tr:hover td { background: var(--bg2); }
.drug-name { color: var(--text); font-weight: 600; }

/* ── LESSON LAYOUT ── */
.lesson-wrap { display: grid; grid-template-columns: 200px 1fr; max-width: 1000px; margin: 0 auto; padding: 0 2.5rem; align-items: start; }
.lesson-toc { position: sticky; top: 5rem; padding: 3rem 2rem 3rem 0; border-right: 1px solid var(--border); }
.toc-label { font-family: var(--font-display); font-size: 0.62rem; letter-spacing: 0.2em; color: var(--muted); margin-bottom: 1rem; font-weight: 300; }
.toc-list { list-style: none; }
.toc-list a, .toc-list a:link, .toc-list a:visited { font-size: 0.76rem; color: var(--muted); padding: 0.3rem 0.7rem; display: block; border-left: 1px solid transparent; transition: all 0.15s; text-decoration: none; }
.toc-list a:hover { color: var(--text); border-left-color: var(--color-grey-light); }
.toc-list a.active { color: var(--text); border-left-color: var(--text); }
.lesson-body { padding: 3rem 0 4rem 2.5rem; }
.lesson-header { margin-bottom: 2.5rem; padding-bottom: 2rem; border-bottom: 1px solid var(--border); }
.lesson-header h1 { font-family: var(--font-display); font-size: clamp(2rem, 5vw, 3.2rem); letter-spacing: 0.04em; line-height: 0.95; color: var(--text); margin-bottom: 0.5rem; font-weight: 300; }
.lesson-header .subtitle { font-family: var(--font-display); font-size: 0.95rem; letter-spacing: 0.06em; color: var(--muted); margin-bottom: 1rem; font-weight: 300; }
.lesson-meta { display: flex; gap: 1rem; font-size: 0.7rem; color: var(--muted); letter-spacing: 0.04em; flex-wrap: wrap; }
.lesson-section { margin-bottom: 3rem; scroll-margin-top: 5rem; }
.lesson-section h2 { font-family: var(--font-display); font-size: 1.05rem; letter-spacing: 0.12em; color: var(--text); margin-bottom: 1rem; padding-bottom: 0.5rem; border-bottom: 1px solid var(--border); font-weight: 300; }
.lesson-section h3 { font-size: 0.88rem; font-weight: 600; color: var(--text); margin: 1.5rem 0 0.5rem; }
.lesson-section p { font-size: 0.95rem; color: #444; line-height: 1.85; margin-bottom: 1rem; }

/* upregulator grid */
.upregulator-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--border); margin: 1.2rem 0; }
.upreg-card { background: var(--bg); padding: 1.1rem; display: flex; flex-direction: column; gap: 0.4rem; }
.upreg-card .upreg-header { display: flex; align-items: center; justify-content: space-between; gap: 0.5rem; }
.upreg-card .upreg-name { font-size: 0.85rem; font-weight: 600; color: var(--text); }
.upreg-card .upreg-tier { font-size: 0.58rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; padding: 0.15rem 0.5rem; flex-shrink: 0; }
.tier-1 { background: var(--text); color: var(--bg); }
.tier-2 { background: var(--bg3); color: var(--muted); border: 1px solid var(--border); }
.upreg-card p { font-size: 0.76rem; color: var(--muted); line-height: 1.55; margin: 0; }

/* compare grid */
.compare-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--border); margin: 1.2rem 0; }
.compare-card { background: var(--bg); padding: 1.2rem; }
.compare-card h4 { font-family: var(--font-display); font-size: 0.9rem; letter-spacing: 0.08em; color: var(--text); margin-bottom: 0.7rem; padding-bottom: 0.4rem; border-bottom: 1px solid var(--border); font-weight: 300; }
.compare-card ul { list-style: none; }
.compare-card ul li { font-size: 0.76rem; color: var(--muted); padding: 0.28rem 0; border-bottom: 1px solid var(--border); line-height: 1.5; }
.compare-card ul li:last-child { border-bottom: none; }

/* cognitive hub */
.lesson-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--border); }
.lesson-card { background: var(--bg); padding: 1.5rem; display: flex; flex-direction: column; gap: 0.6rem; transition: background 0.15s; cursor: pointer; }
.lesson-card:hover { background: var(--bg2); }
.lesson-card.featured { grid-column: span 3; display: grid; grid-template-columns: 1fr 2fr; gap: 2rem; align-items: start; padding: 2rem; }
.lesson-card .l-type { font-size: 0.6rem; font-weight: 700; letter-spacing: 0.16em; text-transform: uppercase; color: var(--muted); }
.lesson-card .l-name { font-family: var(--font-display); font-size: 1.1rem; letter-spacing: 0.03em; color: var(--text); line-height: 1.2; font-weight: 300; }
.lesson-card .l-aka { font-size: 0.7rem; color: var(--color-grey-light); }
.lesson-card p { font-size: 0.78rem; color: var(--muted); line-height: 1.6; flex: 1; }
.lesson-card .l-link { font-size: 0.65rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text); margin-top: auto; }

@media (max-width: 800px) {
  .lesson-wrap { grid-template-columns: 1fr; padding: 0 1.2rem; }
  .lesson-toc { display: none; }
  .lesson-body { padding: 2rem 0; }
  .upregulator-grid, .compare-grid { grid-template-columns: 1fr; }
  .lesson-grid { grid-template-columns: 1fr; }
  .lesson-card.featured { grid-column: span 1; grid-template-columns: 1fr; }
}

/* ── DIVIDERS ── */
.section-break { border: none; border-top: 1px solid var(--border); margin: 2.5rem 0; }

.hr-thin {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--space-5) 0;
}

.divider-block {
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
}

/* ── PAGE HERO ── */
.page-hero {
  padding: var(--space-8) var(--space-6) var(--space-5);
  max-width: var(--max-width);
  margin: 0 auto;
}

.page-hero h1 {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  line-height: 1.05;
  margin: 0.3rem 0 1rem;
  color: var(--text);
}

.page-hero p {
  font-family: var(--font-body);
  color: var(--muted);
  max-width: 60ch;
  font-size: 0.95rem;
  line-height: 1.7;
}

@media (max-width: 640px) {
  .page-hero {
    padding: var(--space-7) var(--space-3) var(--space-4);
  }
  .page-hero p {
    max-width: 100%;
  }
}

/* ── COG WRAP ── */
.cog-wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6) var(--space-8);
}

@media (max-width: 900px) {
  .cog-wrap {
    padding: 0 var(--space-4) var(--space-7);
  }
}

@media (max-width: 640px) {
  .cog-wrap {
    padding: 0 var(--space-3) var(--space-6);
  }
}

/* ── CORNER TAG ── */
.corner-tag {
  position: fixed;
  bottom: var(--space-3);
  right: var(--space-3);
  font-family: var(--font-body);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  color: var(--color-grey-light);
  z-index: 50;
  pointer-events: none;
}

@media (max-width: 640px) {
  .corner-tag {
    display: none;
  }
}

/* ── COGNITIVE CATEGORY ── */
.cog-category { margin-bottom: 3rem; }
.cog-category-header { display: flex; align-items: baseline; gap: 1rem; margin-bottom: 1.2rem; padding-bottom: 0.6rem; border-bottom: 1px solid var(--border); }
.cog-category-header h2 { font-family: var(--font-display); font-size: 1.2rem; letter-spacing: 0.1em; color: var(--text); font-weight: 300; }
.cog-category-header span { font-size: 0.66rem; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); }