:root {
  --color-bg: #0e1113;
  --color-bg-elevated: #15181c;
  --color-surface: #171a1f;
  --color-text: #d1d5db;
  --color-heading: #f3f4f6;
  --color-muted: #9aa3af;
  --color-border: #23262d;
  --color-primary: #d4b48c;
  --color-primary-text: #d4b48c;
  --color-primary-contrast: #1a1208;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --shadow-1: 0 1px 2px rgb(0 0 0 / 0.2), 0 4px 12px rgb(0 0 0 / 0.25);
  --shadow-2: 0 6px 16px rgb(0 0 0 / 0.3), 0 2px 4px rgb(0 0 0 / 0.2);
  --container: 1120px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-7: 32px;
  --space-8: 40px;
  --space-9: 56px;
  --space-10: 72px;
  --font-sans: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto,
    Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas,
    "Liberation Mono", "Courier New", monospace;
  --step--2: clamp(0.69rem, 0.66rem + 0.15vw, 0.8rem);
  --step--1: clamp(0.88rem, 0.86rem + 0.09vw, 0.94rem);
  --step-0: clamp(1rem, 0.94rem + 0.31vw, 1.19rem);
  --step-1: clamp(1.25rem, 1.12rem + 0.63vw, 1.58rem);
  --step-2: clamp(1.56rem, 1.34rem + 1.09vw, 2.11rem);
  --step-3: clamp(1.95rem, 1.6rem + 1.81vw, 2.81rem);
  --step-4: clamp(2.44rem, 1.91rem + 2.86vw, 3.75rem);
  --sidebar-w: clamp(280px, 28vw, 420px);
  color-scheme: dark;
}

[data-theme="light"] {
  --color-bg: #f7f5f2;
  --color-bg-elevated: #ffffff;
  --color-surface: #ffffff;
  --color-text: #1f2937;
  --color-heading: #0f1418;
  --color-muted: #5a6370;
  --color-border: #e5e7eb;
  --color-primary: #b68c52;
  --color-primary-text: #8a6534;
  --color-primary-contrast: #2a1a09;
  --shadow-1: 0 1px 2px rgb(0 0 0 / 0.06), 0 4px 12px rgb(0 0 0 / 0.08);
  --shadow-2: 0 12px 24px rgb(0 0 0 / 0.12);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html:focus-within {
  scroll-behavior: smooth;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--step-0);
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
}

img {
  max-width: 100%;
  display: block;
}

h1,
h2,
h3 {
  line-height: 1.2;
  margin: 0 0 var(--space-4);
}

h1 {
  font-size: var(--step-3);
  letter-spacing: -0.03em;
  color: var(--color-heading);
}
h2 {
  font-size: var(--step-2);
  letter-spacing: -0.015em;
  color: var(--color-heading);
}
h3 {
  font-size: var(--step-1);
  letter-spacing: -0.01em;
  color: var(--color-heading);
}

.eyebrow {
  font-size: var(--step--1);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--color-muted);
  font-weight: 600;
  margin-bottom: var(--space-4);
}

p {
  margin: 0 0 var(--space-4);
}
.lede {
  font-size: var(--step-1);
  color: var(--color-muted);
}
.muted {
  color: var(--color-muted);
}

/* Bare anchors otherwise fall back to UA blues that fail contrast on the
   light background; component styles (nav, buttons, cards) override this. */
a {
  color: var(--color-primary-text);
  text-underline-offset: 2px;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.section {
  padding: var(--space-10) 0;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}
.skip-link:focus {
  left: var(--space-6);
  top: var(--space-6);
  width: auto;
  height: auto;
  padding: var(--space-3) var(--space-4);
  background: var(--color-primary);
  color: var(--color-primary-contrast);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-1);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in oklab, var(--color-bg), transparent 10%);
  backdrop-filter: saturate(150%) blur(10px);
  border-bottom: 1px solid var(--color-border);
}

/* Sidebar (desktop) */
.sidebar {
  display: none;
  position: fixed;
  z-index: 120;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--sidebar-w);
  border-right: 1px solid var(--color-border);
  background: color-mix(in oklab, var(--color-bg), transparent 6%);
  backdrop-filter: blur(8px) saturate(140%);
}
.sidebar-inner {
  height: 100%;
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  padding: var(--space-7) var(--space-6);
}
.sidebar .brand {
  font-weight: 800;
  font-size: var(--step-0);
}
.sidebar-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.sidebar-nav a {
  color: inherit;
  text-decoration: none;
  padding: 8px 10px;
  border-radius: 8px;
}
.sidebar-nav a:hover {
  background: color-mix(in oklab, var(--color-primary), transparent 90%);
}
.sidebar-footer {
  margin-top: auto;
}
.sidebar-footer .social {
  gap: var(--space-3);
}

@media (min-width: 1000px) {
  .sidebar {
    display: block;
  }
  .site-header {
    display: none;
  }
  main,
  .site-footer {
    margin-left: var(--sidebar-w);
  }
  .site-footer .social {
    display: none;
  }
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: var(--space-4);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  color: inherit;
  text-decoration: none;
  font-weight: 700;
}
.brand img {
  border-radius: 50%;
}
.brand-name {
  white-space: nowrap;
}

.primary-nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  position: relative;
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
}

.nav-menu {
  display: none;
  list-style: none;
  margin: 0;
  padding: 0;
  position: absolute;
  top: 54px;
  right: 0;
  min-width: 240px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-2);
}
.nav-menu li {
  border-bottom: 1px solid var(--color-border);
}
.nav-menu li:last-child {
  border-bottom: 0;
}
.nav-menu a,
.nav-menu button {
  display: flex;
  width: 100%;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  color: inherit;
  text-decoration: none;
  background: transparent;
  border: 0;
  text-align: left;
}
.primary-nav.open .nav-menu {
  display: block;
}

@media (min-width: 800px) {
  .nav-toggle {
    display: none;
  }
  .nav-menu {
    position: static;
    display: flex !important;
    align-items: center;
    gap: var(--space-4);
    min-width: 0;
    background: transparent;
    border: 0;
    box-shadow: none;
  }
  .nav-menu li {
    border: 0;
  }
  .nav-menu a,
  .nav-menu button {
    width: auto;
    padding: 0;
  }
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text);
}
.theme-toggle .icon-sun {
  display: none;
}
[data-theme="light"] .theme-toggle .icon-sun {
  display: block;
}
[data-theme="light"] .theme-toggle .icon-moon {
  display: none;
}

.hero {
  padding-top: var(--space-10);
}
.hero-grid {
  display: grid;
  align-items: center;
  gap: var(--space-8);
  grid-template-columns: 1fr;
}
@media (min-width: 960px) {
  .hero-grid {
    grid-template-columns: 1.2fr 0.8fr;
  }
}
.hero-copy h1 {
  font-size: var(--step-4);
  margin-bottom: var(--space-5);
  text-wrap: balance;
}
.hero-copy .lede {
  max-width: 46ch;
}
.hero-copy .muted {
  max-width: 56ch;
}
.hero-copy .actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-top: var(--space-6);
}
.hero-visual {
  display: grid;
  place-items: center;
}
.avatar {
  width: min(360px, 80%);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-2);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  object-fit: cover;
}

/* Long-form case-study pages */
.prose {
  max-width: 72ch;
}
.prose h2 {
  margin-top: var(--space-8);
}
.prose ul {
  margin: 0 0 var(--space-4);
  padding-left: var(--space-5);
}
.prose li {
  margin-bottom: var(--space-3);
}
.prose .lede {
  margin-bottom: var(--space-7);
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  padding: 0;
  list-style: none;
}
.chip {
  padding: 6px 10px;
  border-radius: 999px;
  background: color-mix(in oklab, var(--color-primary), transparent 85%);
  color: color-mix(in oklab, var(--color-primary), var(--color-text) 70%);
  border: 1px solid color-mix(in oklab, var(--color-primary), transparent 75%);
  font-size: var(--step--1);
}

.projects-grid {
  margin-top: var(--space-7);
  display: grid;
  gap: var(--space-6);
  /* 380px keeps this at two columns on desktop, so an even number of cards
     reads as a deliberate grid rather than an orphaned last row. */
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 380px), 1fr));
}

.card {
  display: flex;
  flex-direction: column;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-1);
  transition: transform 160ms ease, box-shadow 160ms ease,
    border-color 160ms ease;
}
.card:hover {
  transform: translateY(-2px);
  border-color: color-mix(
    in oklab,
    var(--color-primary),
    var(--color-border) 50%
  );
  box-shadow: 0 8px 24px rgb(0 0 0 / 0.12);
}
.card-body {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: var(--space-6);
}
.card-kicker {
  font-size: var(--step--2);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 700;
  color: var(--color-primary-text);
  margin-bottom: var(--space-3);
}
.card-title {
  margin: 0 0 var(--space-3);
  font-size: var(--step-1);
}
.card-title a {
  color: inherit;
  text-decoration: none;
}
/* Let the whole card be the hit target without nesting interactive elements. */
.card-title a::after {
  content: "";
  position: absolute;
  inset: 0;
}
.card {
  position: relative;
}
.card-title a:hover {
  color: var(--color-primary-text);
}
.card-desc {
  color: var(--color-muted);
  margin-bottom: var(--space-5);
  font-size: var(--step--1);
}
.card-tags {
  margin-top: auto;
}
.card-more {
  margin-top: var(--space-4);
  font-size: var(--step--1);
  font-weight: 600;
  color: var(--color-primary-text);
}
.card-more::after {
  content: " \2192";
}
.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}
.card-tags .chip {
  padding: 4px 8px;
  font-size: var(--step--2);
}
.links {
  display: flex;
  gap: var(--space-2);
}
.links .button {
  height: 32px;
  padding: 0 12px;
  font-size: var(--step--1);
}

.timeline {
  list-style: none;
  padding: 0;
  margin: var(--space-7) 0 0;
  display: grid;
  gap: var(--space-6);
  position: relative;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
}
.timeline-item {
  display: grid;
  grid-template-columns: 24px 1fr;
  gap: var(--space-4);
}
.timeline-point {
  width: 20px;
  height: 20px;
  margin-left: 1px;
  border-radius: 50%;
  background: var(--color-primary);
  box-shadow: 0 0 0 6px
    color-mix(in oklab, var(--color-primary), transparent 75%);
}
.timeline-content h3 {
  margin: 0 0 var(--space-1);
}

.contact-form {
  margin-top: var(--space-6);
  display: grid;
  gap: var(--space-5);
  max-width: 720px;
}
.form-row {
  display: grid;
  gap: var(--space-2);
}
label {
  font-weight: 600;
}
input,
textarea,
select,
button {
  font: inherit;
  color: inherit;
}
input,
textarea,
select {
  width: 100%;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-bg-elevated);
  outline: none;
}
input:focus,
textarea:focus,
select:focus,
.button:focus,
.theme-toggle:focus,
.nav-toggle:focus {
  outline: 2px solid color-mix(in oklab, var(--color-primary), white 25%);
  outline-offset: 2px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  height: 44px;
  padding: 0 var(--space-5);
  border-radius: 12px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  text-decoration: none;
  cursor: pointer;
}
.button.primary {
  background: var(--color-primary);
  color: var(--color-primary-contrast);
  font-weight: 600;
  border-color: var(--color-primary);
  box-shadow: 0 6px 18px rgb(0 0 0 / 0.12);
}
.button:hover {
  filter: brightness(1.04);
}
.button:active {
  transform: translateY(1px);
}

.site-footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-7) 0;
  background: color-mix(in oklab, var(--color-bg), transparent 4%);
}
.footer-grid {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
}
.social {
  list-style: none;
  display: flex;
  gap: var(--space-4);
  margin: 0;
  padding: 0;
}
.social a {
  color: inherit;
  text-decoration: none;
}
.social a:hover {
  text-decoration: underline;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}