:root {
  --color-text: #1a1a1a;
  --color-text-secondary: #555555;
  --color-text-muted: #6e6e6e;
  --color-bg: #ffffff;
  --color-bg-card: #fafafa;
  --color-bg-card-hover: #f4f7f9;
  --color-border: #e5e5e5;
  --color-border-hover: #93b1c4;
  --color-accent: #4a7389;
  --color-highlight: #3a6175;
  --color-highlight-subtle: rgba(74, 115, 137, 0.07);

  --font-sans: 'Atkinson Hyperlegible Next', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  --space-4xl: 96px;

  --max-width: 720px;
  --max-width-wide: 960px;

  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 2rem;
  --text-4xl: 2.75rem;

  --leading-tight: 1.2;
  --leading-normal: 1.6;

  --radius: 8px;
  --radius-lg: 16px;

  --shadow-soft: 0 2px 12px rgba(0, 0, 0, 0.06);

  --transition-fast: 0.15s ease;
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

[data-theme="dark"] {
  --color-text: #e5e5e5;
  --color-text-secondary: #a8a8a8;
  --color-text-muted: #999999;
  --color-bg: #141414;
  --color-bg-card: #1e1e1e;
  --color-bg-card-hover: #262630;
  --color-border: #2e2e2e;
  --color-border-hover: #5a8da6;
  --color-accent: #7ab3cc;
  --color-highlight: #9ac5d9;
  --color-highlight-subtle: rgba(122, 179, 204, 0.1);
  --shadow-soft: 0 2px 12px rgba(0, 0, 0, 0.3);
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: var(--leading-normal);
}

body.theme-transitions {
  transition: background-color 0.3s ease, color 0.3s ease;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-highlight);
}

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

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

h1, h2, h3, h4 {
  line-height: var(--leading-tight);
  color: var(--color-text);
}

.app {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* Header */
.header {
  padding: var(--space-lg) 0;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-3xl);
}

.header-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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

.header-back {
  background: none;
  border: none;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  cursor: pointer;
  padding: 0;
  transition: color var(--transition-fast);
}

.header-back:hover {
  color: var(--color-accent);
}

.header-name {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.header-name:hover {
  color: var(--color-accent);
}

.header-links {
  display: flex;
  gap: var(--space-lg);
}

.header-links a {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

.header-links a:hover {
  color: var(--color-text);
}

.header-links a.active {
  color: var(--color-accent);
}

.theme-toggle {
  background: none;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--color-text-secondary);
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.theme-toggle:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.theme-toggle .icon-sun,
.theme-toggle .icon-moon {
  display: none;
}

[data-theme="light"] .theme-toggle .icon-sun {
  display: block;
}

[data-theme="dark"] .theme-toggle .icon-moon {
  display: block;
}

/* 404 */
.not-found-page {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-4xl) 0;
  text-align: center;
  min-height: 50vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.not-found-title {
  font-size: 4rem;
  font-weight: 700;
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}

.not-found-text {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xl);
}

.not-found-link {
  font-size: var(--text-sm);
  padding: var(--space-sm) var(--space-lg);
  border: 1px solid var(--color-border);
  border-radius: 100px;
  color: var(--color-text-secondary);
  transition: border-color var(--transition-base), color var(--transition-base);
}

.not-found-link:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

/* Sections */
.section {
  margin-bottom: var(--space-3xl);
}

.section + .section {
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-xl);
}

.section-heading {
  font-size: var(--text-2xl);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-lg);
}

.section-subheading {
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--color-text-muted);
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-md);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
}

.case-studies-grid--earlier .case-study-card {
  opacity: 0.85;
}

.case-studies-grid--earlier .case-study-card:hover {
  opacity: 1;
}

/* Hero */
.hero {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-2xl) 0 var(--space-3xl);
  position: relative;
}

.hero-title {
  font-size: var(--text-4xl);
  font-weight: 700;
  margin-bottom: var(--space-xs);
  position: relative;
}

.hero-identity {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
  margin-bottom: var(--space-2xl);
  position: relative;
}

.hero-photo {
  width: 130px;
  height: 130px;
  border-radius: 50%;
  overflow: hidden;
  flex-shrink: 0;
  border: 2px solid var(--color-border);
}

.hero-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 20%;
}

.hero-name {
  font-size: var(--text-3xl);
  font-weight: 700;
  margin-bottom: var(--space-xs);
  line-height: var(--leading-tight);
}

.hero-tagline {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
}

.hero-intro {
  flex: 1;
  min-width: 0;
}

.hero-philosophy {
  font-size: var(--text-xl);
  font-weight: 500;
  line-height: var(--leading-normal);
  color: var(--color-text);
  margin: 0 0 var(--space-2xl);
  padding: var(--space-lg) var(--space-xl);
  border-left: 3px solid var(--color-highlight);
  background: var(--color-highlight-subtle);
  border-radius: 0 var(--radius) var(--radius) 0;
  position: relative;
}

.hero-philosophy::before {
  content: "\201C";
  position: absolute;
  top: -8px;
  left: 12px;
  font-size: 3rem;
  color: var(--color-highlight);
  opacity: 0.4;
  line-height: 1;
}

/* About */
.about-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  color: var(--color-text-secondary);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
}

/* Case Studies */
.case-studies-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
}

.case-study-card {
  display: block;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  color: var(--color-text);
  position: relative;
  overflow: hidden;
  transition: background var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-spring);
}

.case-study-card:hover {
  background: var(--color-bg-card-hover);
  border-color: var(--color-border-hover);
  transform: translateY(-2px);
}

.case-study-card:active {
  transform: translateY(0);
}

.case-study-card-content {
  padding: var(--space-xl) var(--space-xl);
  position: relative;
  z-index: 1;
}

.case-study-card-header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
}

.case-study-card-meta {
  display: flex;
  gap: var(--space-md);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.case-study-card-title {
  font-size: var(--text-xl);
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.case-study-card-metric {
  display: inline-block;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-highlight);
  margin-bottom: var(--space-sm);
  padding: 2px var(--space-sm);
  background: var(--color-highlight-subtle);
  border-radius: 4px;
}

.case-study-card--compact .case-study-card-content {
  padding: var(--space-lg) var(--space-xl);
}

.case-study-card-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: var(--leading-normal);
  margin-bottom: var(--space-sm);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.case-study-card-cta {
  font-size: var(--text-sm);
  color: var(--color-accent);
  font-weight: 500;
  transition: color var(--transition-fast);
}

.case-study-card:hover .case-study-card-cta {
  color: var(--color-text);
}

/* Timeline */
.timeline-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  position: relative;
}

.timeline-list::before {
  content: "";
  position: absolute;
  left: 3px;
  top: var(--space-lg);
  bottom: var(--space-lg);
  width: 2px;
  background: linear-gradient(to bottom, var(--color-accent), var(--color-border));
  border-radius: 1px;
}

.timeline-item {
  display: flex;
  gap: var(--space-lg);
  padding: var(--space-lg) 0;
  position: relative;
  transition: transform var(--transition-base);
}

.timeline-item:hover {
  transform: translateX(4px);
}

.timeline-marker {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
  margin-top: 8px;
  flex-shrink: 0;
  position: relative;
  z-index: 1;
  transition: transform var(--transition-spring);
}

.timeline-item:hover .timeline-marker {
  transform: scale(1.3);
}

.timeline-content {
  flex: 1;
}

.timeline-period {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.timeline-title {
  font-size: var(--text-base);
  font-weight: 600;
  margin: var(--space-xs) 0;
}

.timeline-company {
  font-weight: 400;
  color: var(--color-text-secondary);
}

.timeline-description {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

/* Contact */
.contact-text {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-lg);
}

.contact-links {
  display: flex;
  gap: var(--space-md);
}

.contact-link {
  padding: var(--space-sm) var(--space-lg);
  border: 1px solid var(--color-border);
  border-radius: 100px;
  font-weight: 500;
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  transition: border-color var(--transition-base), color var(--transition-base), background var(--transition-base), transform var(--transition-spring);
}

.contact-link:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: var(--color-highlight-subtle);
  transform: translateY(-2px);
}

/* Case Study Detail */
.case-study-detail {
  max-width: var(--max-width);
  margin: 0 auto;
  padding-bottom: var(--space-4xl);
}

.case-study-header {
  margin-bottom: var(--space-3xl);
}

.case-study-meta {
  display: flex;
  gap: var(--space-md);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
  flex-wrap: wrap;
}

.case-study-meta span:not(:last-child)::after {
  content: " \00b7";
  margin-left: var(--space-md);
  color: var(--color-border);
}

.case-study-title {
  font-size: var(--text-3xl);
  font-weight: 700;
  margin-bottom: var(--space-md);
}

.case-study-tagline {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  line-height: var(--leading-normal);
}

.case-study-section {
  margin-bottom: var(--space-2xl);
}

.case-study-section h2 {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-md);
  color: var(--color-text);
}

.case-study-section p {
  color: var(--color-text-secondary);
  line-height: var(--leading-normal);
}

.case-study-list {
  list-style: none;
  padding: 0;
}

.case-study-list li {
  position: relative;
  padding-left: var(--space-lg);
  margin-bottom: var(--space-md);
  color: var(--color-text-secondary);
  line-height: var(--leading-normal);
}

.case-study-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
}

.case-study-back {
  display: inline-block;
  margin-top: var(--space-2xl);
  padding: var(--space-sm) var(--space-lg);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
  border-radius: 100px;
  transition: border-color var(--transition-base), color var(--transition-base), transform var(--transition-spring);
}

.case-study-back:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
  transform: translateX(-4px);
}

/* Responsive */
@media (max-width: 768px) {
  .app {
    padding: 0 var(--space-md);
  }

  .hero {
    padding: var(--space-xl) 0 var(--space-2xl);
  }

  .hero-title {
    font-size: var(--text-3xl);
  }

  .hero-identity {
    gap: var(--space-lg);
  }

  .hero-photo {
    width: 100px;
    height: 100px;
  }

  .hero-name {
    font-size: var(--text-2xl);
  }

  .hero-philosophy {
    font-size: var(--text-lg);
    padding: var(--space-md) var(--space-lg);
  }

  .case-study-title {
    font-size: var(--text-2xl);
  }

  .contact-links {
    flex-direction: column;
    gap: var(--space-md);
  }

  .contact-link {
    text-align: center;
  }

  .header-nav {
    flex-direction: column;
    gap: var(--space-md);
    align-items: flex-start;
  }

  .header-links {
    gap: var(--space-md);
    align-items: center;
  }

  .case-studies-grid {
    grid-template-columns: 1fr;
  }
}

/* Case Study Detail -- Narrative Sections */
.case-study-subsection {
  margin-top: var(--space-xl);
  padding-left: var(--space-lg);
  border-left: 2px solid var(--color-border);
}

.case-study-subsection h3 {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
  line-height: var(--leading-normal);
}

.case-study-subsection p {
  color: var(--color-text-secondary);
  line-height: var(--leading-normal);
  margin-bottom: var(--space-md);
}

.case-study-subsection--nested {
  margin-top: var(--space-lg);
  padding-left: var(--space-md);
  border-left: 2px solid var(--color-border);
}

.case-study-subsection--nested h4 {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-xs);
}

.case-study-subsection p:last-child {
  margin-bottom: 0;
}

.case-study-section p + p {
  margin-top: var(--space-md);
}

/* Numbered lists */
.case-study-numbered-list {
  list-style: none;
  padding: 0;
  counter-reset: item;
}

.case-study-numbered-list li {
  position: relative;
  padding-left: var(--space-xl);
  margin-bottom: var(--space-md);
  color: var(--color-text-secondary);
  line-height: var(--leading-normal);
  counter-increment: item;
}

.case-study-numbered-list li::before {
  content: counter(item);
  position: absolute;
  left: 0;
  top: 1px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--color-border);
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

/* Tables */
.case-study-table-wrapper {
  overflow-x: auto;
  margin: var(--space-md) 0;
  border-radius: var(--radius);
}

.case-study-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
  line-height: var(--leading-normal);
}

.case-study-table thead th {
  text-align: left;
  padding: var(--space-sm) var(--space-md);
  font-weight: 600;
  color: var(--color-text);
  background: var(--color-bg-card);
  border-bottom: 2px solid var(--color-border);
  white-space: nowrap;
}

.case-study-table tbody td {
  padding: var(--space-sm) var(--space-md);
  color: var(--color-text-secondary);
  border-bottom: 1px solid var(--color-border);
}

.case-study-table tbody tr:last-child td {
  border-bottom: none;
}

.case-study-table tbody tr:hover {
  background: var(--color-bg-card);
}

/* Key decisions list within My Role */
.case-study-section .case-study-list,
.case-study-section .case-study-numbered-list {
  margin-top: var(--space-md);
}

.case-study-subsection .case-study-table-wrapper {
  margin-left: calc(-1 * var(--space-lg));
  padding-left: 0;
}

@media (max-width: 768px) {
  .case-study-subsection {
    padding-left: var(--space-md);
  }

  .case-study-table {
    font-size: 0.8125rem;
  }

  .case-study-table thead th,
  .case-study-table tbody td {
    padding: var(--space-xs) var(--space-sm);
  }
}

/* Collage Pages (Photography & Art) */
.collage-page {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding-bottom: var(--space-4xl);
}

/* Art -- organic collage */
.art-organic {
  columns: 2;
  column-gap: var(--space-lg);
  max-width: var(--max-width-wide);
  margin: 0 auto;
}

.art-piece {
  break-inside: avoid;
  margin-bottom: var(--space-lg);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform var(--transition-spring), box-shadow var(--transition-base);
  will-change: transform;
}

.art-piece:hover {
  transform: scale(1.03);
  box-shadow: var(--shadow-soft);
  z-index: 1;
  position: relative;
}

.art-piece img {
  width: 100%;
  height: auto;
  display: block;
}

@media (max-width: 600px) {
  .art-organic {
    columns: 1;
  }
}

/* Case study summary */
.case-study-summary {
  margin-top: 1.5rem;
  padding: 1.25rem 1.5rem;
  background: var(--color-highlight-subtle);
  border-left: 3px solid var(--color-accent);
  border-radius: 0 8px 8px 0;
}

.case-study-summary ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.case-study-summary li {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  line-height: 1.55;
  padding-left: 1rem;
  position: relative;
}

.case-study-summary li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--color-accent);
}

.case-study-summary li:last-child {
  color: var(--color-text);
  font-weight: 500;
}

/* About -- How I Work principles */
.about-heading {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  margin: 1.5rem 0 0.75rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.about-principles {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.about-principle {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--color-text-secondary);
}

.about-principle strong {
  color: var(--color-text);
}