/* ============================================================
   MCSL — Mission Critical Sourcing & Logistics
   Design tokens + components
   ============================================================ */

:root,
[data-theme='light'] {
  /* Surfaces — cool steel-white, engineering feel */
  --color-bg: #f3f5f7;
  --color-surface: #ffffff;
  --color-surface-2: #fbfcfd;
  --color-surface-offset: #eceff2;
  --color-surface-offset-2: #e1e6ea;
  --color-surface-dynamic: #d5dce1;
  --color-divider: #dbe1e6;
  --color-border: #c7d0d8;

  /* Text */
  --color-text: #101820;
  --color-text-muted: #55606b;
  --color-text-faint: #8b96a0;
  --color-text-inverse: #f3f5f7;

  /* Primary accent — industrial signal blue */
  --color-primary: #0b6fa8;
  --color-primary-hover: #085a87;
  --color-primary-active: #04435f;
  --color-primary-highlight: #cfe6f2;

  /* Status */
  --color-warning: #96591a;
  --color-warning-highlight: #e7dac8;
  --color-error: #b3261e;
  --color-error-highlight: #e6cfcd;
  --color-success: #2f7d4f;
  --color-success-highlight: #cfe1d5;

  /* Always-dark brand sections (hero/footer) */
  --color-ink: #0b1420;
  --color-ink-2: #101c2b;
  --color-ink-3: #142333;
  --color-ink-border: #26384d;
  --color-ink-text: #e7edf2;
  --color-ink-muted: #93a5b4;
  --color-ink-accent: #3fb6e8;
  --color-ink-accent-hover: #63c6ee;

  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1.25rem;
  --radius-full: 9999px;

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

  --shadow-sm: 0 1px 2px oklch(0.2 0.02 235 / 0.06);
  --shadow-md: 0 4px 14px oklch(0.2 0.02 235 / 0.09);
  --shadow-lg: 0 16px 40px oklch(0.2 0.02 235 / 0.14);

  --content-narrow: 640px;
  --content-default: 1040px;
  --content-wide: 1280px;
  --content-full: 100%;

  --font-display: 'Cabinet Grotesk', 'Arial Black', sans-serif;
  --font-body: 'Satoshi', 'Inter', sans-serif;
}

[data-theme='dark'] {
  --color-bg: #0b1420;
  --color-surface: #101c2b;
  --color-surface-2: #142333;
  --color-surface-offset: #0e1a28;
  --color-surface-offset-2: #182838;
  --color-surface-dynamic: #1f3145;
  --color-divider: #22334a;
  --color-border: #2b3f58;

  --color-text: #e7edf2;
  --color-text-muted: #9fb0bf;
  --color-text-faint: #6d7e8d;
  --color-text-inverse: #0b1420;

  --color-primary: #3fb6e8;
  --color-primary-hover: #63c6ee;
  --color-primary-active: #8dd6f2;
  --color-primary-highlight: #1c3a4d;

  --color-warning: #e0a458;
  --color-warning-highlight: #4a3b2a;
  --color-error: #e2726b;
  --color-error-highlight: #4a2a28;
  --color-success: #6fc98d;
  --color-success-highlight: #24402f;

  --color-ink: #0b1420;
  --color-ink-2: #101c2b;
  --color-ink-3: #142333;
  --color-ink-border: #26384d;
  --color-ink-text: #e7edf2;
  --color-ink-muted: #93a5b4;
  --color-ink-accent: #3fb6e8;
  --color-ink-accent-hover: #63c6ee;

  --shadow-sm: 0 1px 2px oklch(0 0 0 / 0.3);
  --shadow-md: 0 4px 14px oklch(0 0 0 / 0.4);
  --shadow-lg: 0 16px 40px oklch(0 0 0 / 0.5);
}

/* Type scale */
:root {
  --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, 3.25rem);
  --text-3xl: clamp(2.5rem, 1rem + 4vw, 4.5rem);

  --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;
}

/* ============ Base type ============ */
body {
  font-family: var(--font-body), 'Inter', sans-serif;
}

h1, h2, h3, h4 {
  font-family: var(--font-display), 'Arial Black', sans-serif;
  letter-spacing: -0.01em;
}

a {
  color: inherit;
  text-decoration: none;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-primary);
}
[data-theme='light'] .on-dark .eyebrow,
.on-dark .eyebrow {
  color: var(--color-ink-accent);
}

.eyebrow::before {
  content: '';
  width: 18px;
  height: 2px;
  background: currentColor;
  display: inline-block;
}

/* ============ Layout helpers ============ */
.container {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-5);
}
.container--narrow {
  max-width: var(--content-narrow);
  margin-inline: auto;
  padding-inline: var(--space-5);
}
.container--default {
  max-width: var(--content-default);
  margin-inline: auto;
  padding-inline: var(--space-5);
}

section {
  padding-block: clamp(var(--space-16), 8vw, var(--space-24));
}
section.tight {
  padding-block: clamp(var(--space-10), 5vw, var(--space-16));
}

.on-dark {
  background: var(--color-ink);
  color: var(--color-ink-text);
}
.on-dark h1, .on-dark h2, .on-dark h3, .on-dark h4 {
  color: var(--color-ink-text);
}
.on-dark p {
  color: var(--color-ink-muted);
}

.surface-offset {
  background: var(--color-surface-offset);
}

/* ============ Skip link ============ */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-primary);
  color: #fff;
  padding: var(--space-2) var(--space-4);
  z-index: 200;
  border-radius: var(--radius-sm);
}
.skip-link:focus {
  left: var(--space-4);
  top: var(--space-4);
}

/* ============ Header ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: oklch(from var(--color-ink) l c h / 0.92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-ink-border);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  padding-block: var(--space-4);
}
.brand {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-ink-text);
}
.brand__mark {
  width: 38px;
  height: 38px;
  color: var(--color-ink-accent);
  flex-shrink: 0;
}
.brand__type {
  display: flex;
  flex-direction: column;
  line-height: 1.05;
}
.brand__name {
  font-family: var(--font-display), sans-serif;
  font-weight: 800;
  font-size: var(--text-lg);
  letter-spacing: 0.01em;
  color: var(--color-ink-text);
}
.brand__sub {
  font-size: 0.6rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
  font-weight: 600;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}
.main-nav__list {
  display: flex;
  gap: var(--space-6);
}
.main-nav__list a {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-ink-muted);
  padding-block: var(--space-2);
  position: relative;
}
.main-nav__list a:hover,
.main-nav__list a[aria-current='page'] {
  color: var(--color-ink-text);
}
.main-nav__list a[aria-current='page']::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 2px;
  background: var(--color-ink-accent);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.theme-toggle {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-full);
  color: var(--color-ink-muted);
  border: 1px solid var(--color-ink-border);
}
.theme-toggle:hover {
  color: var(--color-ink-text);
  border-color: var(--color-ink-accent);
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  place-items: center;
  color: var(--color-ink-text);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 600;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-sm);
  min-height: 44px;
  white-space: nowrap;
}
.btn--primary {
  background: var(--color-primary);
  color: #fff;
}
.btn--primary:hover {
  background: var(--color-primary-hover);
}
.btn--on-dark {
  background: var(--color-ink-accent);
  color: var(--color-ink);
}
.btn--on-dark:hover {
  background: var(--color-ink-accent-hover);
}
.btn--ghost-dark {
  border: 1px solid var(--color-ink-border);
  color: var(--color-ink-text);
}
.btn--ghost-dark:hover {
  border-color: var(--color-ink-accent);
  color: var(--color-ink-accent);
}
.btn--ghost {
  border: 1px solid var(--color-border);
  color: var(--color-text);
}
.btn--ghost:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.btn--block {
  width: 100%;
}

/* ============ Hero ============ */
.hero {
  position: relative;
  padding-block: clamp(var(--space-20), 12vw, var(--space-32)) clamp(var(--space-16), 8vw, var(--space-24));
  overflow: hidden;
}
.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.34;
}
.hero__bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, var(--color-ink) 0%, oklch(from var(--color-ink) l c h / 0.86) 45%, var(--color-ink) 100%);
}
.hero__content {
  position: relative;
  z-index: 1;
  max-width: 760px;
}
.hero__content--wide {
  max-width: 920px;
}
.hero h1 {
  font-size: var(--text-3xl);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: -0.01em;
  margin-block: var(--space-5);
  line-height: 1.04;
}
.hero p.lede {
  font-size: var(--text-lg);
  color: var(--color-ink-muted);
  max-width: 62ch;
  margin-bottom: var(--space-8);
}
.hero__actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}
.hero__stats {
  display: flex;
  gap: var(--space-10);
  margin-top: var(--space-16);
  flex-wrap: wrap;
  border-top: 1px solid var(--color-ink-border);
  padding-top: var(--space-8);
}
.hero__stat dt {
  font-family: var(--font-display), sans-serif;
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--color-ink-text);
}
.hero__stat dd {
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-top: var(--space-1);
}

/* Page header (interior pages, non-home) */
.page-header {
  padding-block: clamp(var(--space-16), 8vw, var(--space-24)) clamp(var(--space-10), 6vw, var(--space-16));
}
.page-header h1 {
  font-size: var(--text-2xl);
  font-weight: 800;
  text-transform: uppercase;
  margin-block: var(--space-4);
  line-height: 1.08;
}
.page-header p.lede {
  font-size: var(--text-lg);
  color: var(--color-ink-muted);
  max-width: 58ch;
}

/* ============ Section headings ============ */
.section-head {
  max-width: 720px;
  margin-bottom: var(--space-12);
}
.section-head h2 {
  font-size: var(--text-xl);
  font-weight: 800;
  margin-block: var(--space-4) var(--space-3);
  text-transform: uppercase;
}
.section-head p {
  color: var(--color-text-muted);
  font-size: var(--text-base);
}
.section-head--center {
  margin-inline: auto;
  text-align: center;
}

/* ============ Problem / editorial split ============ */
.split {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
  align-items: center;
}
@media (min-width: 900px) {
  .split {
    grid-template-columns: 1.05fr 0.95fr;
    gap: var(--space-16);
  }
  .split--reverse {
    grid-template-columns: 0.95fr 1.05fr;
  }
  .split--reverse .split__media {
    order: 2;
  }
}
.split__media img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
}
.split__eyebrow {
  margin-bottom: var(--space-4);
}
.split h2 {
  font-size: var(--text-xl);
  font-weight: 800;
  margin-bottom: var(--space-5);
  text-transform: uppercase;
}
.split p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}
.split ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-top: var(--space-6);
}
.split ul li {
  padding-left: var(--space-6);
  position: relative;
  font-size: var(--text-sm);
  color: var(--color-text);
}
.split ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 8px;
  height: 2px;
  background: var(--color-primary);
}

/* ============ Process steps ============ */
.process {
  display: flex;
  flex-direction: column;
}
.process__step {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: var(--space-6);
  padding-block: var(--space-8);
  border-top: 1px solid var(--color-divider);
}
.process__step:first-child {
  border-top: none;
}
@media (min-width: 760px) {
  .process__step {
    grid-template-columns: 88px 1fr 1fr;
    gap: var(--space-8);
    align-items: start;
  }
}
.process__num {
  font-family: var(--font-display), sans-serif;
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--color-primary-highlight);
  -webkit-text-stroke: 1.5px var(--color-primary);
  color: transparent;
  line-height: 1;
}
[data-theme='dark'] .process__num {
  -webkit-text-stroke: 1.5px var(--color-primary);
}
.process__title {
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-2);
}
.process__desc {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  max-width: 46ch;
}

/* ============ Category feature grid (asymmetric, not uniform icon-cards) ============ */
.category-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}
@media (min-width: 700px) {
  .category-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 1100px) {
  .category-grid {
    grid-template-columns: repeat(6, 1fr);
    grid-template-rows: repeat(2, auto);
  }
  .category-card--lead {
    grid-column: span 3;
    grid-row: span 2;
  }
  .category-card--std {
    grid-column: span 3;
  }
}
.category-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: var(--space-4);
  box-shadow: var(--shadow-sm);
}
.category-card--lead {
  background: var(--color-ink);
  border-color: var(--color-ink-border);
  color: var(--color-ink-text);
  padding: var(--space-8);
}
.category-card--lead .category-card__tag {
  color: var(--color-ink-accent);
}
.category-card--lead p {
  color: var(--color-ink-muted);
}
.category-card__tag {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
}
.category-card h3 {
  font-size: var(--text-lg);
  font-weight: 700;
  margin-top: var(--space-2);
}
.category-card--lead h3 {
  font-size: var(--text-xl);
}
.category-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* ============ Differentiator callouts ============ */
.diff-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.diff-item {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  padding-block: var(--space-8);
  border-top: 1px solid var(--color-divider);
}
.diff-item:first-child {
  border-top: none;
}
@media (min-width: 820px) {
  .diff-item {
    grid-template-columns: 320px 1fr;
    gap: var(--space-10);
  }
}
.diff-item__label {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
}
.diff-item h3 {
  font-size: var(--text-lg);
  font-weight: 700;
  margin-top: var(--space-2);
}
.diff-item p {
  color: var(--color-text-muted);
  margin-top: var(--space-3);
  max-width: 62ch;
}

/* ============ CTA band ============ */
.cta-band {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
  align-items: flex-start;
}
@media (min-width: 820px) {
  .cta-band {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}
.cta-band h2 {
  font-size: var(--text-xl);
  font-weight: 800;
  text-transform: uppercase;
  max-width: 20ch;
}
.cta-band__actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  flex-shrink: 0;
}

/* ============ Public sector strip (Solutions page — kept quiet) ============ */
.pubsector {
  border-top: 1px solid var(--color-divider);
  padding-top: var(--space-10);
  margin-top: var(--space-4);
}
.pubsector__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-6);
}
.pubsector__head h2 {
  font-size: var(--text-base);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}
.pubsector__head span {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}
.pubsector-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}
@media (min-width: 760px) {
  .pubsector-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}
.pubsector-item {
  padding: var(--space-5);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-md);
}
.pubsector-item h3 {
  font-size: var(--text-sm);
  font-weight: 700;
  margin-bottom: var(--space-2);
}
.pubsector-item p {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* ============ Cards: generic ============ */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
}

/* ============ Pull quote ============ */
.pull-quote {
  border-top: 2px solid var(--color-primary);
  padding-top: var(--space-6);
  max-width: 46ch;
}
.pull-quote p {
  font-family: var(--font-display), sans-serif;
  font-size: var(--text-lg);
  font-weight: 600;
  line-height: 1.3;
  text-transform: none;
}
.pull-quote cite {
  display: block;
  margin-top: var(--space-4);
  font-size: var(--text-xs);
  font-style: normal;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* ============ Timeline (network / sourcing page) ============ */
.flow {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}
.flow__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  padding: var(--space-6);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}
@media (min-width: 760px) {
  .flow__row {
    grid-template-columns: 220px 1fr;
    align-items: center;
  }
}
.flow__row h3 {
  font-size: var(--text-base);
  font-weight: 700;
}
.flow__row p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* ============ Forms ============ */
.form-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}
@media (min-width: 640px) {
  .form-grid--2 {
    grid-template-columns: 1fr 1fr;
  }
}
.field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.field label {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}
.field input,
.field select,
.field textarea {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  font-size: var(--text-base);
  min-height: 44px;
}
.field textarea {
  min-height: 120px;
  resize: vertical;
}
.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-highlight);
}
.form-success {
  display: none;
  padding: var(--space-5);
  border-radius: var(--radius-md);
  background: var(--color-success-highlight);
  color: var(--color-success);
  font-size: var(--text-sm);
  font-weight: 600;
}
.form-success.is-visible {
  display: block;
}

/* ============ Contact list ============ */
.contact-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}
.contact-list__item {
  padding-block: var(--space-5);
  border-top: 1px solid var(--color-divider);
}
.contact-list__item:first-child {
  border-top: none;
  padding-top: 0;
}
.contact-list__label {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}
.contact-list__value {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-top: var(--space-1);
}
.contact-list__value a:hover {
  color: var(--color-primary);
}

/* ============ Footer ============ */
.site-footer {
  padding-block: clamp(var(--space-16), 6vw, var(--space-20)) var(--space-8);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-10);
}
@media (min-width: 760px) {
  .footer-grid {
    grid-template-columns: 1.4fr 1fr 1fr 1fr;
  }
}
.footer-brand p {
  color: var(--color-ink-muted);
  font-size: var(--text-sm);
  max-width: 34ch;
  margin-top: var(--space-4);
}
.footer-col h4 {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
  margin-bottom: var(--space-4);
}
.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.footer-col a {
  font-size: var(--text-sm);
  color: var(--color-ink-text);
}
.footer-col a:hover {
  color: var(--color-ink-accent);
}
.footer-bottom {
  margin-top: var(--space-16);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-ink-border);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  justify-content: space-between;
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}

/* ============ Mobile nav drawer ============ */
@media (max-width: 900px) {
  .main-nav {
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    height: calc(100vh - 68px);
    height: calc(100dvh - 68px);
    overflow-y: auto;
    background: var(--color-ink);
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-6) var(--space-5);
    gap: var(--space-8);
    transform: translateX(100%);
    transition: transform var(--transition-interactive);
    z-index: 90;
  }
  .main-nav.is-open {
    transform: translateX(0);
  }
  .main-nav__list {
    flex-direction: column;
    gap: var(--space-2);
  }
  .main-nav__list a {
    font-size: var(--text-lg);
    padding-block: var(--space-3);
    border-bottom: 1px solid var(--color-ink-border);
  }
  .header-actions .btn--on-dark {
    width: 100%;
  }
  .nav-toggle {
    display: grid;
  }
}