@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;600;700&family=Source+Serif+4:ital,wght@0,400;0,600;1,400&family=IBM+Plex+Mono:wght@500&display=swap');

/* CSS Variables */
:root {
  --color-paper: #F1F3EE;
  --color-ink: #171F1B;
  --color-rust: #C23B22;
  --color-ink-muted: rgba(23, 31, 27, 0.6);
  --color-paper-raised: #E7E9E2;
  --color-border: rgba(23, 31, 27, 0.12);
  --color-border-hover: rgba(23, 31, 27, 1);
  --font-display: 'Space Grotesk', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-body: 'Source Serif 4', Georgia, serif;
  --font-mono: 'IBM Plex Mono', monospace;
  --base-spacing: 8px;
}

/* Reset and Base Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  height: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 18px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  padding-top: 64px; /* Space for sticky nav */
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

main {
  flex: 1 0 auto;
}

/* Typography elements */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.2;
  overflow-wrap: break-word;
  word-break: break-word;
}

h1 {
  font-size: 3rem; /* 48px - poster look restored */
  margin-bottom: calc(var(--base-spacing) * 3);
}

@media (min-width: 768px) {
  h1 {
    font-size: 3.5rem; /* 56px */
  }
}

h2 {
  font-size: 1.875rem; /* 30px */
  margin-bottom: calc(var(--base-spacing) * 2);
}

h3 {
  font-size: 1.25rem; /* 20px */
  font-weight: 500;
  margin-bottom: var(--base-spacing);
}

p {
  margin-bottom: calc(var(--base-spacing) * 2);
}

blockquote {
  border-left: 2px solid var(--color-ink);
  padding-left: calc(var(--base-spacing) * 2.5);
  font-style: italic;
  margin: calc(var(--base-spacing) * 3) 0;
}

a {
  color: var(--color-ink);
  text-decoration: underline;
  text-underline-offset: 4px;
  transition: color 0.15s ease;
}

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

/* Layout Utilities */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 calc(var(--base-spacing) * 3);
}

.body-column {
  max-width: 760px;
  margin: 0 auto;
}

.mono-label {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-ink-muted);
}

/* Header & Navigation */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 64px;
  background-color: var(--color-paper);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 calc(var(--base-spacing) * 3);
}

.logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  text-decoration: none;
}

.logo:hover {
  color: var(--color-ink);
}

nav ul {
  display: flex;
  list-style: none;
  gap: calc(var(--base-spacing) * 3);
}

nav a {
  font-family: var(--font-mono);
  font-size: 13px;
  text-decoration: none;
  color: var(--color-ink-muted);
}

nav a.active {
  color: var(--color-ink);
  border-bottom: 1px solid var(--color-ink);
  padding-bottom: 2px;
}

nav a:hover {
  color: var(--color-rust);
}

/* Footer */
footer {
  background-color: var(--color-paper-raised);
  padding: calc(var(--base-spacing) * 6) 0;
  border-top: 1px solid var(--color-border);
  margin-top: calc(var(--base-spacing) * 12);
}

.footer-container {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 calc(var(--base-spacing) * 3);
  gap: calc(var(--base-spacing) * 3);
}

@media (min-width: 768px) {
  .footer-container {
    flex-direction: row;
  }
}

.footer-links {
  display: flex;
  gap: calc(var(--base-spacing) * 3);
}

.footer-links a {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-ink-muted);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--color-rust);
  text-decoration: underline;
}

/* Home Page Specifics */
.hero {
  min-height: calc(100vh - 64px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  padding: calc(var(--base-spacing) * 6) 0;
  max-width: 800px;
}

.hero h1 {
  line-height: 1.1;
  margin-bottom: calc(var(--base-spacing) * 4);
}

.hero p {
  font-size: 1.35rem;
  color: var(--color-ink-muted);
  margin-bottom: calc(var(--base-spacing) * 6);
}

.hero-actions {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: calc(var(--base-spacing) * 2.5);
}

.hero-connect-link {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--color-ink-muted);
  text-decoration: underline;
  text-underline-offset: 4px;
  transition: color 0.15s ease;
}

.hero-connect-link:hover {
  color: var(--color-rust);
}

.cta-button {
  display: inline-block;
  background-color: var(--color-rust);
  color: white;
  padding: calc(var(--base-spacing) * 1.5) calc(var(--base-spacing) * 3);
  font-family: var(--font-display);
  font-weight: 600;
  text-decoration: none;
  border: 1px solid var(--color-rust);
  transition: all 0.15s ease;
}

.cta-button:hover {
  background-color: var(--color-paper);
  color: var(--color-rust);
}

.cta-button:focus {
  outline: 2px solid var(--color-ink);
  outline-offset: 2px;
}

/* About Page Specifics */
.about-section {
  padding-top: calc(var(--base-spacing) * 8);
  padding-bottom: calc(var(--base-spacing) * 8);
}

.about-meta {
  margin-bottom: calc(var(--base-spacing) * 4);
}

.tools-list {
  display: flex;
  flex-wrap: wrap;
  gap: calc(var(--base-spacing) * 1.5);
  margin-top: calc(var(--base-spacing) * 2);
  margin-bottom: calc(var(--base-spacing) * 4);
  list-style: none;
}

.tools-list li {
  font-family: var(--font-mono);
  font-size: 13px;
  background-color: var(--color-paper-raised);
  padding: 4px 8px;
  border: 1px solid var(--color-border);
}

/* Product Work Grid */
.work-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  padding: calc(var(--base-spacing) * 8) 0;
}

@media (min-width: 640px) {
  .work-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
  }
}

@media (min-width: 1024px) {
  .work-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
  }
}

/* Project Card */
.project-card {
  background-color: var(--color-paper-raised);
  border: 1px solid var(--color-border);
  padding: calc(var(--base-spacing) * 4);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 280px;
  transition: border-color 0.15s ease;
  text-decoration: none;
  color: inherit;
}

.project-card:hover {
  border-color: var(--color-border-hover);
}

.project-card:focus {
  outline: 2px solid var(--color-ink);
}

.project-card-header {
  margin-bottom: calc(var(--base-spacing) * 2);
}

.project-card-badges {
  display: flex;
  flex-wrap: wrap;
  gap: calc(var(--base-spacing) * 1);
  margin-bottom: calc(var(--base-spacing) * 2);
}

.badge {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  color: var(--color-ink-muted);
  border: 1px solid var(--color-border);
  padding: 2px 6px;
  border-radius: 2px;
}

.project-card-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 600;
  margin-bottom: var(--base-spacing);
  line-height: 1.2;
}

.project-card-description {
  font-size: 15px;
  color: var(--color-ink-muted);
  line-height: 1.5;
}

.project-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: calc(var(--base-spacing) * 3);
  font-family: var(--font-mono);
  font-size: 12px;
}

.project-card-cta {
  font-family: var(--font-display);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.project-card-docs {
  color: var(--color-ink-muted);
  text-decoration: none;
}
.project-card-docs:hover {
  color: var(--color-rust);
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* Project Page Margin-Rail Layout */
.project-layout {
  display: flex;
  flex-direction: column;
  gap: calc(var(--base-spacing) * 6);
  padding-top: calc(var(--base-spacing) * 6);
}

@media (min-width: 1024px) {
  .project-layout {
    flex-direction: row;
    position: relative;
  }
}

.project-hero {
  padding-top: calc(var(--base-spacing) * 3);
  padding-bottom: calc(var(--base-spacing) * 6);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: calc(var(--base-spacing) * 8);
}

.project-hero h1 {
  font-size: 2.15rem;
}

@media (min-width: 600px) {
  .project-hero h1 {
    font-size: 2.75rem;
  }
}

@media (min-width: 768px) {
  .project-hero h1 {
    font-size: 3.5rem;
  }
}

.project-hero-meta {
  display: flex;
  gap: calc(var(--base-spacing) * 2);
  margin-bottom: calc(var(--base-spacing) * 2);
}

/* Margin annotation rail */
.margin-rail {
  width: 100%;
}

@media (min-width: 1024px) {
  .margin-rail {
    width: 220px;
    flex-shrink: 0;
    position: sticky;
    top: 96px;
    height: fit-content;
  }
}

.margin-rail-content {
  display: flex;
  flex-direction: column;
  gap: calc(var(--base-spacing) * 3);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: calc(var(--base-spacing) * 4);
  margin-bottom: calc(var(--base-spacing) * 4);
}

@media (min-width: 1024px) {
  .margin-rail-content {
    border-bottom: none;
    padding-bottom: 0;
    margin-bottom: 0;
  }
}

.margin-rail-item {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-ink-muted);
  line-height: 1.4;
}

.margin-rail-item-title {
  font-weight: 500;
  color: var(--color-ink);
  text-transform: uppercase;
  margin-bottom: 4px;
}

/* Main copy column on project pages */
.project-body {
  flex-grow: 1;
  max-width: 760px;
}

/* Sections stack vertically with generous rhythm */
.project-section {
  margin-bottom: 96px;
  scroll-margin-top: 96px;
}

.section-eyebrow {
  margin-bottom: 4px;
}

.section-annotation-mobile {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-ink-muted);
  background-color: var(--color-paper-raised);
  padding: 8px 12px;
  border-left: 2px solid var(--color-ink-muted);
  margin-bottom: calc(var(--base-spacing) * 2);
}

@media (min-width: 1024px) {
  .section-annotation-mobile {
    display: none;
  }
}

/* EST. / TARGET Stamp */
.stamp {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-rust);
  border: 1.5px solid var(--color-rust);
  padding: 1px 5px;
  transform: rotate(-3deg);
  margin-left: 6px;
  vertical-align: middle;
  background-color: transparent;
  line-height: 1;
}

/* Live Prototype block */
.prototype-block {
  background-color: var(--color-paper-raised);
  border: 1px solid var(--color-border);
  padding: calc(var(--base-spacing) * 4);
  margin: calc(var(--base-spacing) * 4) 0 calc(var(--base-spacing) * 8) 0;
}

.prototype-title {
  margin-bottom: calc(var(--base-spacing) * 2);
}

.prototype-cta {
  display: inline-block;
  color: var(--color-rust);
  font-weight: 600;
  font-size: 1.1rem;
  text-decoration: underline;
  text-underline-offset: 6px;
}

.prototype-cta:hover {
  color: var(--color-ink);
}

/* Raw doc link in the body */
.raw-doc-link-container {
  margin-top: calc(var(--base-spacing) * 6);
  padding-top: calc(var(--base-spacing) * 4);
  border-top: 1px solid var(--color-border);
}

.raw-doc-link {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--color-ink-muted);
  text-decoration: none;
}

.raw-doc-link:hover {
  color: var(--color-ink);
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* Markdown styling inside project pages */
.project-content ul, .project-content ol {
  margin-left: calc(var(--base-spacing) * 3);
  margin-bottom: calc(var(--base-spacing) * 3);
}

.project-content li {
  margin-bottom: calc(var(--base-spacing) * 1);
}

.project-content h3 {
  margin-top: calc(var(--base-spacing) * 4);
}

.project-content table {
  width: 100%;
  border-collapse: collapse;
  margin: calc(var(--base-spacing) * 4) 0;
  font-size: 15px;
}

.project-content th, .project-content td {
  border: 1px solid var(--color-border);
  padding: calc(var(--base-spacing) * 1.5);
  text-align: left;
}

.project-content th {
  background-color: var(--color-paper-raised);
  font-family: var(--font-display);
  font-weight: 600;
}

/* Anchor styling inside text */
.project-content a {
  text-underline-offset: 4px;
}

/* Blog list and page layout */
.blog-list {
  display: flex;
  flex-direction: column;
  gap: calc(var(--base-spacing) * 4);
  padding: calc(var(--base-spacing) * 6) 0;
}

.blog-post-item {
  display: flex;
  flex-direction: column;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: calc(var(--base-spacing) * 4);
}

.blog-post-meta {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-ink-muted);
  margin-bottom: calc(var(--base-spacing) * 1);
}

.blog-post-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: calc(var(--base-spacing) * 1);
  text-decoration: none;
}

.blog-post-title:hover {
  color: var(--color-rust);
}

.blog-post-excerpt {
  color: var(--color-ink-muted);
}