/* ==========================================================================
   Leadwood Systems — Museum-Grade Editorial Design System
   ========================================================================== */

/* ---------- 1. Variables ---------- */

:root {
  --color-background: #fbf4ec;
  --color-foreground: #222222;
  --color-accent-warm: #B7B5AD;
  --color-accent-cool: #5D5D5D;
  --color-btn-primary: #3A3A3A;
  --color-surface-hover: #E8E7DF;

  --font-heading: "Playfair Display", Georgia, serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 8rem;
  --space-2xl: 12rem;
  --space-3xl: 16rem;

  --max-width: 1200px;
  --content-width: 680px;
  --wide-width: 960px;

  --transition: 0.3s cubic-bezier(0.25, 0, 0.25, 1);
  --transition-slow: 0.8s cubic-bezier(0.25, 0, 0.25, 1);
}

/* ---------- 2. Reset ---------- */

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

html {
  font-size: 100%;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-weight: 300;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-foreground);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  position: relative;
}

/* ---------- Tree Branch Background Decoration ---------- */
/* Ambient branch on secondary pages — quiet, residual.
   The page background matches the motif's paper tone so the branch
   can render cleanly without extra blending. */

body::before {
  content: "";
  position: fixed;
  top: -4vh;
  right: -3vw;
  width: 58vw;
  height: 108vh;
  background-image: url("/assets/images/leadwood-branch-2.png");
  background-repeat: no-repeat;
  background-position: right top;
  background-size: cover;
  pointer-events: none;
  z-index: 0;
  opacity: 0.32;
}

@media (max-width: 768px) {
  body::before {
    width: 85vw;
    opacity: 0.25;
  }
}

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

a {
  color: var(--color-foreground);
  text-decoration: none;
  border-bottom: 1px solid var(--color-accent-warm);
  transition: border-color var(--transition), opacity var(--transition);
}

a:hover {
  border-bottom-color: var(--color-foreground);
}

ul,
ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

::selection {
  background-color: var(--color-accent-warm);
  color: var(--color-foreground);
}

/* ---------- 3. Typography ---------- */

h1,
h2,
h3,
h4 {
  font-family: var(--font-heading);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: 0.01em;
  color: var(--color-foreground);
}

h1 {
  font-size: clamp(2.4rem, 5.5vw, 4.5rem);
  margin-bottom: var(--space-lg);
  line-height: 1.05;
}

h2 {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  margin-bottom: var(--space-md);
  letter-spacing: 0.015em;
}

h3 {
  font-size: clamp(1.15rem, 2vw, 1.4rem);
  margin-bottom: var(--space-sm);
  letter-spacing: 0.02em;
}

h4 {
  font-size: 1rem;
  font-family: var(--font-body);
  font-weight: 400;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: var(--space-sm);
  color: var(--color-accent-cool);
}

p {
  margin-bottom: var(--space-sm);
  max-width: 58ch;
}

blockquote {
  border-left: 2px solid var(--color-accent-warm);
  padding-left: var(--space-md);
  margin: var(--space-lg) 0;
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-style: italic;
  line-height: 1.5;
  color: var(--color-accent-cool);
  max-width: 48ch;
}

/* Horizontal rule — thin, quiet */
hr {
  border: none;
  border-top: 1px solid var(--color-accent-warm);
  margin: var(--space-xl) 0;
}

/* Small label text */
.label {
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent-cool);
  margin-bottom: var(--space-sm);
  display: block;
}

/* ---------- 4. Layout ---------- */

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.container--narrow {
  max-width: var(--content-width);
  margin: 0 auto;
}

.container--wide {
  max-width: var(--wide-width);
  margin: 0 auto;
}

main {
  min-height: 60vh;
}

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

/* Generous section divider */
.section-divider {
  border: none;
  border-top: 1px solid var(--color-accent-warm);
  margin: 0;
  width: 100%;
}

/* ---------- 5. Scroll Reveal ---------- */

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.9s cubic-bezier(0.25, 0, 0.25, 1),
    transform 0.9s cubic-bezier(0.25, 0, 0.25, 1);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 {
  transition-delay: 0.1s;
}

.reveal-delay-2 {
  transition-delay: 0.2s;
}

.reveal-delay-3 {
  transition-delay: 0.3s;
}

.reveal-delay-4 {
  transition-delay: 0.4s;
}

/* Stagger children */
.stagger-children .reveal:nth-child(1) {
  transition-delay: 0s;
}

.stagger-children .reveal:nth-child(2) {
  transition-delay: 0.1s;
}

.stagger-children .reveal:nth-child(3) {
  transition-delay: 0.2s;
}

.stagger-children .reveal:nth-child(4) {
  transition-delay: 0.3s;
}

/* ---------- 6. Header ---------- */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 40;
  padding: var(--space-sm) 0;
  background-color: var(--color-background);
  transition: box-shadow var(--transition), padding var(--transition);
}

.site-header.is-scrolled {
  box-shadow: 0 1px 0 var(--color-accent-warm);
  padding: 0.5rem 0;
}

.site-header.is-scrolled .logo-img {
  height: 88px;
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  border-bottom: none;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo:hover {
  border-bottom: none;
  opacity: 0.7;
}

.logo-img {
  height: 148px;
  width: auto;
  object-fit: contain;
  transition: height var(--transition), opacity var(--transition);
}

.logo-icon {
  flex-shrink: 0;
}

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

.nav-list a {
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border-bottom: none;
  padding-bottom: 0;
  position: relative;
  color: var(--color-accent-cool);
  transition: color var(--transition);
}

.nav-list a::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--color-foreground);
  transition: width var(--transition);
}

.nav-list a:hover,
.nav-list a[aria-current="page"] {
  color: var(--color-foreground);
  border-bottom: none;
}

.nav-list a:hover::after,
.nav-list a[aria-current="page"]::after {
  width: 100%;
}

/* Nav button style (Contact) */
.nav-list a.nav-btn {
  background-color: var(--color-btn-primary);
  color: var(--color-background);
  padding: 0.55rem 1.25rem;
  border-radius: 6px;
  transition: background-color var(--transition), color var(--transition), transform var(--transition);
}

.nav-list a.nav-btn::after {
  display: none;
}

.nav-list a.nav-btn:hover,
.nav-list a.nav-btn[aria-current="page"] {
  background-color: var(--color-foreground);
  color: var(--color-background);
  transform: translateY(-1px);
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  padding: var(--space-xs);
  position: relative;
  z-index: 60;
}

.nav-toggle-bar {
  display: block;
  width: 22px;
  height: 1px;
  background-color: var(--color-foreground);
  transition: transform 0.4s cubic-bezier(0.25, 0, 0.25, 1),
    opacity 0.4s cubic-bezier(0.25, 0, 0.25, 1);
  transform-origin: center;
}

.nav-toggle.is-active .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.is-active .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle.is-active .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Header spacer for fixed header */
.header-spacer {
  height: 172px;
}

/* ---------- 7. Footer ---------- */

.site-footer {
  padding: var(--space-xl) 0 var(--space-lg);
  border-top: 1px solid var(--color-accent-warm);
  margin-top: var(--space-2xl);
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer-logo {
  height: 84px;
  width: auto;
  object-fit: contain;
  opacity: 0.45;
  transition: opacity var(--transition);
}

.footer-logo:hover {
  opacity: 0.65;
}

.footer-tagline {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-style: italic;
  color: var(--color-accent-cool);
  max-width: 24ch;
  line-height: 1.4;
}

.footer-copy {
  font-size: 0.7rem;
  color: var(--color-accent-cool);
  letter-spacing: 0.04em;
}

.footer-nav {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.5rem;
}

.footer-nav a {
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent-cool);
  border-bottom: none;
  transition: color var(--transition);
}

.footer-nav a:hover {
  color: var(--color-foreground);
  border-bottom: none;
}

/* ---------- Newsletter Signup ---------- */

.footer-newsletter {
  display: flex;
  justify-content: flex-end;
  padding-top: var(--space-md);
}

.newsletter-signup {
  text-align: right;
  font-size: 0.85rem;
  max-width: 280px;
}

.newsletter-title {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 400;
  margin-bottom: var(--space-xs);
  letter-spacing: 0.02em;
}

.newsletter-description {
  font-size: 0.75rem;
  color: var(--color-accent-cool);
  margin-bottom: var(--space-md);
  line-height: 1.5;
}

.newsletter-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.newsletter-input-group {
  display: flex;
  gap: 0.5rem;
}

.newsletter-input {
  flex: 1;
  padding: 0.5rem 0.75rem;
  font-size: 0.85rem;
  border: 1px solid var(--color-accent-warm);
  background-color: transparent;
  font-family: var(--font-body);
  color: var(--color-foreground);
  transition: border-color var(--transition);
}

.newsletter-input:focus {
  outline: none;
  border-color: var(--color-foreground);
}

.newsletter-input::placeholder {
  color: var(--color-accent-cool);
  opacity: 0.7;
}

.newsletter-submit {
  padding: 0.5rem 1rem;
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background-color: transparent;
  color: var(--color-foreground);
  border: 1px solid var(--color-foreground);
  cursor: pointer;
  transition: all var(--transition);
}

.newsletter-submit:hover {
  background-color: var(--color-foreground);
  color: var(--color-background);
}

.newsletter-privacy {
  font-size: 0.65rem;
  color: var(--color-accent-cool);
  margin-top: var(--space-xs);
  line-height: 1.4;
}

/* ---------- 8. Hero — Cinematic ---------- */

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: var(--space-3xl) var(--space-md);
  text-align: center;
  overflow: hidden;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 720px;
}

.hero-label {
  font-size: 0.65rem;
  font-weight: 400;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent-cool);
  margin-bottom: var(--space-lg);
  display: block;
  opacity: 0;
  animation: fadeUp 1s cubic-bezier(0.25, 0, 0.25, 1) 0.3s forwards;
}

.hero h1 {
  font-size: clamp(2.8rem, 7vw, 5.5rem);
  margin-bottom: var(--space-md);
  line-height: 1.0;
  letter-spacing: -0.01em;
  opacity: 0;
  animation: fadeUp 1s cubic-bezier(0.25, 0, 0.25, 1) 0.5s forwards;
}

.hero-subtitle {
  font-size: 1.05rem;
  font-weight: 300;
  color: var(--color-accent-cool);
  max-width: 42ch;
  margin: 0 auto var(--space-lg);
  line-height: 1.8;
  opacity: 0;
  animation: fadeUp 1s cubic-bezier(0.25, 0, 0.25, 1) 0.7s forwards;
}

.hero-cta {
  display: inline-block;
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border: none;
  border-bottom: none;
  padding: 0.9rem 2.5rem;
  border-radius: 6px;
  background-color: var(--color-btn-primary);
  color: var(--color-background);
  transition: background-color var(--transition), color var(--transition), transform var(--transition);
  opacity: 0;
  animation: fadeUp 1s cubic-bezier(0.25, 0, 0.25, 1) 0.9s forwards;
}

.hero-cta:hover {
  background-color: var(--color-foreground);
  color: var(--color-background);
  border-bottom: none;
  transform: translateY(-2px);
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- 9. Section Layouts ---------- */

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

.section-intro .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: start;
}

.section-intro h2 {
  position: sticky;
  top: 100px;
}

.section-intro .section-text p {
  font-size: 1.05rem;
  line-height: 1.85;
}

/* Full-bleed divider line */
.divider-line {
  width: 60px;
  height: 1px;
  background-color: var(--color-accent-warm);
  margin: var(--space-xl) auto;
}

/* Pull quote — for emphasis */
.pull-quote {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  line-height: 1.2;
  text-align: center;
  max-width: 18ch;
  margin: var(--space-xl) auto;
  padding: var(--space-xl) var(--space-md);
  color: var(--color-foreground);
}

/* ---------- 10. Cards — Editorial ---------- */

.card-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  margin-top: var(--space-md);
  background-color: var(--color-accent-warm);
}

.card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: var(--space-lg) var(--space-md);
  background-color: var(--color-background);
  border-bottom: none;
  min-height: 280px;
  transition: background-color 0.5s cubic-bezier(0.25, 0, 0.25, 1);
}

.card:hover {
  border-bottom: none;
  background-color: var(--color-surface-hover);
}

.card-body {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.card-title {
  font-size: clamp(1.3rem, 2.5vw, 1.8rem);
  margin-bottom: var(--space-sm);
  line-height: 1.15;
}

.card-excerpt {
  font-size: 0.9rem;
  font-weight: 300;
  color: var(--color-accent-cool);
  margin-bottom: auto;
  line-height: 1.7;
  max-width: 38ch;
}

.card-date {
  font-size: 0.65rem;
  color: var(--color-accent-cool);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-top: var(--space-md);
}

.card-image {
  margin-bottom: var(--space-sm);
  overflow: hidden;
}

.card-image img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  transition: transform 0.8s cubic-bezier(0.25, 0, 0.25, 1);
}

.card:hover .card-image img {
  transform: scale(1.03);
}

/* ---------- 11. Projects ---------- */

.project-detail {
  display: flex;
  flex-direction: column;
}

/* Dark header band */
.project-band {
  background-color: var(--color-foreground);
  color: var(--color-background);
  padding: var(--space-2xl) var(--space-md) var(--space-xl);
}

.project-band-inner {
  max-width: var(--content-width);
  margin: 0 auto;
}

.project-band-meta {
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent-warm);
  margin-bottom: var(--space-md);
}

.project-band-title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  color: var(--color-background);
  line-height: 1.15;
  margin-bottom: var(--space-md);
}

.project-band-overview {
  font-size: 1.1rem;
  font-weight: 300;
  line-height: 1.75;
  color: var(--color-accent-warm);
  max-width: 52ch;
  margin-bottom: var(--space-lg);
}

.project-band-github {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.65rem 1.5rem;
  border: 1px solid var(--color-accent-warm);
  border-radius: 4px;
  color: var(--color-background);
  transition: background-color var(--transition), color var(--transition), border-color var(--transition);
}

.project-band-github:hover {
  background-color: var(--color-background);
  color: var(--color-foreground);
  border-color: var(--color-background);
  opacity: 1;
}

/* Content body */
.project-body {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: var(--space-xl) var(--space-md) var(--space-xl);
  width: 100%;
}

.project-content {
  margin-bottom: var(--space-xl);
}

.project-content p {
  font-size: 1.05rem;
  line-height: 1.85;
}

.project-content h2 {
  margin-top: var(--space-xl);
}

.project-content h3 {
  margin-top: var(--space-lg);
}

.project-content ul {
  list-style: none;
  padding-left: 0;
  margin-bottom: var(--space-md);
}

.project-content li {
  margin-bottom: var(--space-xs);
  padding-left: var(--space-md);
  position: relative;
  font-size: 1.05rem;
  line-height: 1.85;
}

.project-content li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.9em;
  width: 16px;
  height: 1px;
  background-color: var(--color-accent-warm);
}

.project-content img {
  margin: var(--space-lg) 0;
}

.project-content strong {
  font-weight: 500;
}

.back-link {
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent-cool);
  border-bottom: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.back-link::before {
  content: "";
  display: block;
  width: 24px;
  height: 1px;
  background-color: var(--color-accent-warm);
  transition: width var(--transition);
}

.back-link:hover {
  color: var(--color-foreground);
  border-bottom: none;
}

.back-link:hover::before {
  width: 40px;
  background-color: var(--color-foreground);
}

/* Owner-only CMS edit link — hidden for the public, revealed via ?edit */
.edit-link {
  display: none;
}

.edit-mode .edit-link {
  display: inline-flex;
  align-items: center;
  margin-left: var(--space-lg);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent-warm);
  border-bottom: none;
}

.edit-mode .edit-link:hover {
  color: var(--color-foreground);
  border-bottom: none;
}

/* Featured image (within project-body) */
.featured-image {
  margin: 0 0 var(--space-xl);
  overflow: hidden;
}

.featured-image img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

/* ---------- 12. Listing pages ---------- */

.listing {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-2xl) var(--space-md) var(--space-xl);
}

.listing-header {
  margin-bottom: var(--space-xl);
  text-align: center;
}

.listing-header h1 {
  margin-bottom: var(--space-md);
}

.listing-intro {
  color: var(--color-accent-cool);
  max-width: 44ch;
  margin: 0 auto;
  font-size: 1.05rem;
  line-height: 1.8;
}

/* ---------- 13. Contact form ---------- */

.contact-section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-2xl) var(--space-md) var(--space-xl);
}

.contact-header {
  text-align: center;
  margin-bottom: var(--space-xl);
}

.contact-header h1 {
  margin-bottom: var(--space-md);
}

.contact-intro {
  max-width: 44ch;
  margin: 0 auto;
  color: var(--color-accent-cool);
  font-size: 1.05rem;
  line-height: 1.8;
  text-align: center;
}

.contact-form {
  max-width: 520px;
  margin: var(--space-xl) auto 0;
}

.form-group {
  margin-bottom: var(--space-md);
}

.form-group label {
  display: block;
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 0.6rem;
  color: var(--color-accent-cool);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.85rem 0;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 300;
  color: var(--color-foreground);
  background-color: transparent;
  border: none;
  border-bottom: 1px solid var(--color-accent-warm);
  transition: border-color var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-bottom-color: var(--color-foreground);
}

.form-group textarea {
  min-height: 120px;
  resize: vertical;
  border: 1px solid var(--color-accent-warm);
  padding: 0.85rem;
  margin-top: 0.3rem;
}

.form-group textarea:focus {
  border-color: var(--color-foreground);
}

.form-submit {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.9rem 2.5rem;
  border-radius: 6px;
  color: var(--color-background);
  background-color: var(--color-btn-primary);
  border: none;
  cursor: pointer;
  transition: background-color var(--transition), color var(--transition), transform var(--transition);
  margin-top: var(--space-sm);
}

.form-submit:hover {
  background-color: var(--color-foreground);
  color: var(--color-background);
  transform: translateY(-2px);
}

/* ---------- 14. About page ---------- */

.about-hero {
  padding: var(--space-2xl) 0 var(--space-xl);
  text-align: center;
}

.about-hero h1 {
  margin-bottom: var(--space-md);
}

.about-hero-text {
  max-width: 48ch;
  margin: 0 auto;
  font-size: 1.15rem;
  font-weight: 300;
  line-height: 1.85;
  color: var(--color-accent-cool);
}

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

.about-section .container {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--space-xl);
  align-items: start;
}

.about-section h2 {
  position: sticky;
  top: 100px;
  font-size: clamp(1.4rem, 2.5vw, 1.8rem);
}

.about-text p {
  font-size: 1.05rem;
  line-height: 1.85;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background-color: var(--color-accent-warm);
  margin-top: var(--space-lg);
}

.service-item {
  background-color: var(--color-background);
  padding: var(--space-lg) var(--space-md);
}

.service-item h3 {
  margin-bottom: var(--space-xs);
}

.service-item p {
  font-size: 0.9rem;
  font-weight: 300;
  color: var(--color-accent-cool);
  line-height: 1.7;
  max-width: 36ch;
}

/* ---------- 16. Page layout (generic) ---------- */

.page {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-2xl) var(--space-md) var(--space-xl);
}

.page-header {
  margin-bottom: var(--space-xl);
  text-align: center;
}

.page-content h2 {
  margin-top: var(--space-xl);
}

.page-content ul {
  list-style: none;
  padding-left: 0;
  margin-bottom: var(--space-md);
}

.page-content li {
  margin-bottom: var(--space-xs);
  padding-left: var(--space-md);
  position: relative;
}

.page-content li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.85em;
  width: 16px;
  height: 1px;
  background-color: var(--color-accent-warm);
}

/* ---------- 17. Accessibility ---------- */

:focus-visible {
  outline: 2px solid var(--color-foreground);
  outline-offset: 3px;
}

.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;
}

a:focus-visible {
  border-bottom-color: var(--color-foreground);
}

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-sm);
  padding: var(--space-xs) var(--space-sm);
  background: var(--color-foreground);
  color: var(--color-background);
  z-index: 100;
  border-bottom: none;
  font-size: 0.8rem;
}

.skip-link:focus {
  top: var(--space-xs);
}

/* ---------- 18. Responsive ---------- */

@media (max-width: 900px) {
  .section-intro .container {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .section-intro h2 {
    position: static;
  }

  .about-section .container {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .about-section h2 {
    position: static;
  }

  .services-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --space-xl: 5rem;
    --space-2xl: 7rem;
    --space-3xl: 10rem;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    height: 100vh;
    background-color: var(--color-background);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: right 0.5s cubic-bezier(0.25, 0, 0.25, 1);
    z-index: 50;
  }

  .site-nav.is-open {
    right: 0;
  }

  .nav-list {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }

  .nav-list a {
    font-size: 0.9rem;
    letter-spacing: 0.15em;
  }

  .footer-inner {
    flex-direction: column;
    gap: var(--space-lg);
    align-items: flex-start;
  }

  .footer-nav {
    align-items: flex-start;
  }

  .footer-newsletter {
    justify-content: flex-start;
    max-width: 100%;
  }

  .newsletter-signup {
    text-align: left;
    max-width: 100%;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }

  .card {
    min-height: auto;
    padding: var(--space-md);
  }

  .hero {
    min-height: 90vh;
    padding: var(--space-2xl) var(--space-sm);
  }

  .hero h1 {
    font-size: clamp(2.2rem, 10vw, 3.5rem);
  }

  .pull-quote {
    font-size: clamp(1.5rem, 6vw, 2rem);
  }
}

@media (max-width: 480px) {
  :root {
    --space-md: 1.25rem;
    --space-lg: 2.5rem;
  }

  .header-inner {
    padding: 0 var(--space-sm);
  }
}

/* ---------- 19. Reduced motion ---------- */
/* Honour visitors who prefer reduced motion: hold everything still and
   present content immediately, in keeping with a calm, unhurried brand. */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .reveal,
  .hero-label,
  .hero h1,
  .hero-subtitle,
  .hero-cta {
    opacity: 1 !important;
    transform: none !important;
  }
}

/* ---------- 20. Products & Research ---------- */

.listing-more {
  margin-top: var(--space-md);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.listing-more a {
  color: var(--color-accent-cool);
  border-bottom: 1px solid var(--color-accent-warm);
  padding-bottom: 2px;
  transition: color var(--transition), border-color var(--transition);
}

.listing-more a:hover {
  color: var(--color-foreground);
  border-color: var(--color-foreground);
}

.section-lead {
  font-size: 1.05rem;
  color: var(--color-accent-cool);
  max-width: 46ch;
  margin-top: var(--space-sm);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  margin-top: var(--space-md);
  background-color: var(--color-accent-warm);
}

.product-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: var(--space-lg) var(--space-md);
  background-color: var(--color-background);
  min-height: 240px;
  transition: background-color 0.5s cubic-bezier(0.25, 0, 0.25, 1);
}

.product-card:hover {
  background-color: var(--color-surface-hover);
}

.product-card-body {
  display: flex;
  flex-direction: column;
  margin-bottom: var(--space-md);
}

.product-card-title {
  font-size: clamp(1.2rem, 2.2vw, 1.6rem);
  line-height: 1.2;
  margin-bottom: var(--space-sm);
}

.product-card-desc {
  font-size: 0.9rem;
  font-weight: 300;
  color: var(--color-accent-cool);
  line-height: 1.7;
  max-width: 42ch;
}

.status-badge {
  align-self: flex-start;
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent-cool);
  border: 1px solid var(--color-accent-warm);
  border-radius: 999px;
  padding: 0.3rem 0.7rem;
  line-height: 1;
}

.status-badge[data-status="Live"] {
  color: var(--color-foreground);
  border-color: var(--color-accent-cool);
}

/* ---------- 21. Process flow (How we work) ---------- */

.process-flow {
  list-style: none;
  margin-top: var(--space-lg);
  max-width: var(--content-width);
}

.flow-step {
  display: flex;
  align-items: baseline;
  gap: var(--space-sm);
  font-family: var(--font-heading);
  font-size: clamp(1.3rem, 2.6vw, 1.9rem);
  line-height: 1.3;
  padding: var(--space-sm) 0;
  border-top: 1px solid var(--color-accent-warm);
}

.flow-step:last-child {
  border-bottom: 1px solid var(--color-accent-warm);
}

.flow-index {
  font-family: var(--font-body);
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  color: var(--color-accent-cool);
  flex-shrink: 0;
  min-width: 2ch;
}

.flow-step-final {
  color: var(--color-foreground);
}

.flow-step-final .flow-index {
  color: var(--color-foreground);
}

/* ---------- 22. Principles ---------- */

.principles-list {
  list-style: none;
  margin-top: var(--space-lg);
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background-color: var(--color-accent-warm);
}

.principles-list li {
  background-color: var(--color-background);
  padding: var(--space-md);
  font-family: var(--font-heading);
  font-size: 1.15rem;
  line-height: 1.4;
}

@media (max-width: 720px) {
  .product-grid,
  .principles-list {
    grid-template-columns: 1fr;
  }
}