/* ============================================
   ChrisEatonAI — Personal Website
   Warm dark · Clean borders · Content-first
   Typography: IBM Plex Sans / IBM Plex Mono
   ============================================ */

/* --- Tokens --- */
:root {
  --bg: #1a1814;
  --bg-raised: #21201b;
  --bg-hover: #2a2922;
  --text: #ede9e1;
  --text-secondary: #a39e93;
  --text-tertiary: #706b62;
  --accent: #e8a735;
  --accent-dim: rgba(232, 167, 53, 0.12);
  --border: #302e28;
  --border-hover: #45423a;
  --font: 'IBM Plex Sans', -apple-system, system-ui, sans-serif;
  --mono: 'IBM Plex Mono', 'SF Mono', monospace;
  --ease: cubic-bezier(0.25, 0.1, 0.25, 1);
  --content-width: 680px;
}

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

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

body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

/* --- Layout --- */
.container {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Navigation --- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-name {
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: -0.01em;
  cursor: pointer;
}

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

.nav-links {
  display: flex;
  gap: 28px;
}

.nav-links a {
  font-size: 0.85rem;
  color: var(--text-secondary);
  transition: color 0.2s var(--ease);
  cursor: pointer;
}

.nav-links a:hover,
.nav-links a.nav-active {
  color: var(--text);
}

/* --- Hero --- */
.hero {
  padding: 80px 0 64px;
}

.hero-tag {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--accent);
  margin-bottom: 20px;
}

.hero-title {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.025em;
  margin-bottom: 20px;
  max-width: 580px;
}

.hero-desc {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text-secondary);
  max-width: 560px;
  margin-bottom: 32px;
}

.hero-now {
  display: flex;
  gap: 16px;
  padding: 16px 20px;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.now-label {
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding-top: 2px;
  flex-shrink: 0;
}

.hero-now p {
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

/* --- Dividers --- */
.divider {
  border: none;
  border-top: 1px solid var(--border);
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Sections --- */
.section {
  padding: 64px 0;
}

.section-header {
  margin-bottom: 40px;
}

.section-title {
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 6px;
}

.section-desc {
  font-size: 0.9rem;
  color: var(--text-tertiary);
}

/* --- About --- */
.about-body {
  line-height: 1.8;
  color: var(--text-secondary);
}

.about-body p {
  margin-bottom: 1.25em;
}

.about-body p:first-child {
  font-size: 1.1rem;
  color: var(--text);
}

.about-body p:last-child {
  margin-bottom: 0;
}

.about-body a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
  text-decoration-color: var(--accent-dim);
  transition: text-decoration-color 0.2s var(--ease);
}

.about-body a:hover {
  text-decoration-color: var(--accent);
}

/* --- Posts (Writing) --- */
.post-list {
  display: flex;
  flex-direction: column;
}

.post {
  display: flex;
  gap: 24px;
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
  transition: background 0.2s var(--ease);
  cursor: pointer;
}

.post:first-child {
  border-top: 1px solid var(--border);
}

.post:hover {
  background: var(--bg-raised);
  margin: 0 -16px;
  padding: 20px 16px;
  border-radius: 8px;
  border-color: transparent;
}

.post:hover + .post {
  border-top-color: transparent;
}

.post-meta {
  flex-shrink: 0;
  width: 80px;
  padding-top: 2px;
}

.post-meta time {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--text-tertiary);
}

.post-body {
  flex: 1;
  min-width: 0;
}

.post-title {
  font-size: 1rem;
  font-weight: 500;
  margin-bottom: 6px;
  line-height: 1.4;
}

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

.post-excerpt {
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

/* --- Projects --- */
.project-list {
  display: flex;
  flex-direction: column;
}

.project {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
  transition: background 0.2s var(--ease);
  cursor: pointer;
}

.project:first-child {
  border-top: 1px solid var(--border);
}

.project:hover {
  background: var(--bg-raised);
  margin: 0 -16px;
  padding: 20px 16px;
  border-radius: 8px;
  border-color: transparent;
}

.project:hover + .project {
  border-top-color: transparent;
}

.project-info {
  flex: 1;
  min-width: 0;
}

.project-name {
  font-size: 1rem;
  font-weight: 500;
  margin-bottom: 4px;
  line-height: 1.4;
}

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

.project-desc {
  font-size: 0.85rem;
  line-height: 1.5;
  color: var(--text-secondary);
}

.project-tags {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
}

.tag {
  font-family: var(--mono);
  font-size: 0.7rem;
  padding: 3px 8px;
  border-radius: 4px;
  background: var(--accent-dim);
  color: var(--accent);
  white-space: nowrap;
}

.arrow-icon {
  flex-shrink: 0;
  color: var(--text-tertiary);
  opacity: 0;
  transform: translate(-4px, 4px);
  transition: all 0.2s var(--ease);
}

.project:hover .arrow-icon,
.ext-link:hover .arrow-icon {
  opacity: 1;
  transform: translate(0, 0);
}

/* --- Links (Elsewhere) --- */
.link-list {
  display: flex;
  flex-direction: column;
}

.ext-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
  transition: background 0.2s var(--ease);
  cursor: pointer;
}

.ext-link:first-child {
  border-top: 1px solid var(--border);
}

.ext-link:hover {
  background: var(--bg-raised);
  margin: 0 -16px;
  padding: 16px 16px;
  border-radius: 8px;
  border-color: transparent;
}

.ext-link:hover + .ext-link {
  border-top-color: transparent;
}

.ext-link-name {
  font-size: 0.95rem;
  font-weight: 500;
  min-width: 110px;
}

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

.ext-link-handle {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--text-tertiary);
  flex: 1;
}

/* --- Article (Blog Post) --- */
.article {
  padding: 40px 0 80px;
}

.article-header {
  margin-bottom: 48px;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--text-tertiary);
  margin-bottom: 32px;
  transition: color 0.2s var(--ease);
  cursor: pointer;
}

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

.article-title {
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.025em;
  margin-bottom: 16px;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--text-tertiary);
}

.meta-sep {
  opacity: 0.4;
}

/* Article body — long-form prose */
.article-body {
  line-height: 1.8;
  color: var(--text-secondary);
}

.article-body p {
  margin-bottom: 1.5em;
}

.article-body .article-lede {
  font-size: 1.1rem;
  line-height: 1.75;
  color: var(--text);
}

.article-body h2 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text);
  margin-top: 2.5em;
  margin-bottom: 0.75em;
  letter-spacing: -0.01em;
}

.article-body h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
  margin-top: 2em;
  margin-bottom: 0.5em;
}

.article-body hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2.5em 0;
}

.article-body blockquote {
  border-left: 2px solid var(--accent);
  padding-left: 20px;
  margin: 2em 0;
  font-style: italic;
  color: var(--text-secondary);
}

.article-body a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
  text-decoration-color: var(--accent-dim);
  transition: text-decoration-color 0.2s var(--ease);
}

.article-body a:hover {
  text-decoration-color: var(--accent);
}

.article-body ul,
.article-body ol {
  padding-left: 1.5em;
  margin-bottom: 1.5em;
}

.article-body li {
  margin-bottom: 0.5em;
}

.article-body code {
  font-family: var(--mono);
  font-size: 0.875em;
  background: var(--bg-raised);
  padding: 2px 6px;
  border-radius: 3px;
  border: 1px solid var(--border);
}

.article-body pre {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 20px;
  overflow-x: auto;
  margin-bottom: 1.5em;
  font-size: 0.85rem;
  line-height: 1.6;
}

.article-body pre code {
  background: none;
  border: none;
  padding: 0;
}

/* --- Footer --- */
.footer {
  margin-top: 32px;
  padding: 32px 0;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer p {
  font-size: 0.8rem;
  color: var(--text-tertiary);
}

.footer-note {
  font-family: var(--mono);
  font-size: 0.75rem !important;
  color: var(--text-tertiary);
  opacity: 0.6;
}

/* --- Scroll Reveal --- */
.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}

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

.reveal-d1 { transition-delay: 0.05s; }
.reveal-d2 { transition-delay: 0.1s; }
.reveal-d3 { transition-delay: 0.15s; }

/* --- Accessibility --- */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}

/* --- Responsive --- */
@media (max-width: 640px) {
  .hero {
    padding: 56px 0 48px;
  }

  .hero-title {
    font-size: 1.5rem;
  }

  .section {
    padding: 48px 0;
  }

  .post {
    flex-direction: column;
    gap: 4px;
  }

  .post-meta {
    width: auto;
  }

  .project {
    flex-wrap: wrap;
  }

  .project-tags {
    width: 100%;
    order: 3;
    margin-top: 4px;
  }

  .arrow-icon {
    display: none;
  }

  .ext-link-handle {
    display: none;
  }

  .footer-inner {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }

  .nav-links {
    gap: 20px;
  }
}