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

/* ===== Theme Variables ===== */
:root,
[data-theme="light"] {
  --bg:          #f5f3f0;
  --bg-surface:  #eae7e3;
  --bg-hover:    #dfdbd6;
  --text:        #2c2c2c;
  --text-muted:  #5c5650;
  --accent:      #8b6e4e;
  --accent-hover:#a3825e;
  --border:      #d6d1cb;
  --code-bg:     #e8e4df;
  --shadow:      0 1px 3px rgba(0,0,0,0.06);
  --timeline-leadership: #5e8b6e;
  --timeline-education:  #6e7a8b;
}

[data-theme="dark"] {
  --bg:          #1c1b1a;
  --bg-surface:  #262524;
  --bg-hover:    #302e2d;
  --text:        #d4cfc9;
  --text-muted:  #9a948d;
  --accent:      #c4a47a;
  --accent-hover:#d4b88e;
  --border:      #3a3836;
  --code-bg:     #2a2928;
  --shadow:      0 1px 3px rgba(0,0,0,0.3);
  --timeline-leadership: #7ab88a;
  --timeline-education:  #8a9ab8;
}

/* ===== Accessibility ===== */
.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;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 200;
  padding: 0.5rem 1rem;
  background: var(--accent);
  color: #fff;
  border-radius: 0 0 4px 4px;
  font-weight: 600;
  text-decoration: none;
  transition: top 0.15s ease;
}

.skip-link:focus {
  top: 0;
  color: #fff;
}

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

.timeline-dot:focus-visible {
  outline-offset: 3px;
}

/* ===== Base ===== */
html {
  font-size: 17px;
  scroll-behavior: smooth;
  overflow-x: hidden;
}

@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;
  }
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background 0.2s ease, color 0.2s ease;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  max-width: 680px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.15s ease;
}
a:hover { color: var(--accent-hover); }

h1, h2, h3, h4 {
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

h1 { font-size: 2rem; margin-bottom: 0.5rem; }
h2 { font-size: 1.4rem; margin-top: 2rem; margin-bottom: 0.75rem; }
h3 { font-size: 1.15rem; margin-top: 1.5rem; margin-bottom: 0.5rem; }

p { margin-bottom: 1.2rem; }

img {
  max-width: 100%;
  border-radius: 4px;
}

code {
  font-family: "SF Mono", "Fira Code", "Fira Mono", Menlo, monospace;
  font-size: 0.88em;
  background: var(--code-bg);
  padding: 0.15em 0.4em;
  border-radius: 3px;
}

pre {
  background: var(--code-bg);
  padding: 1.2rem;
  border-radius: 6px;
  overflow-x: auto;
  margin-bottom: 1.5rem;
  line-height: 1.5;
}
pre code {
  background: none;
  padding: 0;
}

blockquote {
  border-left: 3px solid var(--accent);
  padding-left: 1rem;
  color: var(--text-muted);
  margin: 1.5rem 0;
}

hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2.5rem 0;
}

ul, ol {
  padding-left: 1.5rem;
  margin-bottom: 1.2rem;
}
li { margin-bottom: 0.3rem; }

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 110;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.5rem;
  background: var(--bg);
  transition: background 0.2s ease;
}

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

.site-title {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  text-decoration: none;
}

.site-title-name {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.01em;
  transition: color 0.15s ease;
}

.site-title-tagline {
  font-family: 'Caveat', cursive;
  font-size: 1rem;
  color: var(--text-muted);
  font-weight: 400;
}

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

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.site-nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  padding: 0.25rem 0;
  border-bottom: 1px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}

.site-nav a:hover {
  color: var(--text);
}

.site-nav a.active {
  color: var(--text);
  border-bottom-color: var(--accent);
}

.header-social {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.header-social a {
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  transition: color 0.15s ease;
}

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

/* ===== Theme Toggle ===== */
.theme-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 44px;
  height: 44px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.15s ease;
}
.theme-toggle:hover { border-color: var(--text-muted); }

[data-theme="light"] .theme-icon::after { content: "☾"; font-size: 14px; }
[data-theme="dark"] .theme-icon::after { content: "☀"; font-size: 14px; color: #fff; }

/* ===== Main Content ===== */
main {
  flex: 1;
  padding-bottom: 4rem;
}

/* ===== Home Page ===== */
.home-intro {
  margin-bottom: 3rem;
}

.home-intro h1 {
  font-size: 2.2rem;
  margin-bottom: 0.75rem;
}

.home-intro p {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 540px;
}

.home-section {
  margin-bottom: 3rem;
}

.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.5rem;
}

.section-header h2 { margin: 0; }

.section-header a {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ===== Post List ===== */
.post-list {
  list-style: none;
  padding: 0;
}

.post-list li {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
}
.post-list li:last-child { border-bottom: none; }

.post-list a {
  color: var(--text);
  font-weight: 450;
}
.post-list a:hover { color: var(--accent); }

.post-list time {
  font-size: 0.85rem;
  color: var(--text-muted);
  white-space: nowrap;
  flex-shrink: 0;
}

/* ===== Project Cards ===== */
.project-grid {
  display: grid;
  gap: 1rem;
}

.project-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem;
  transition: border-color 0.15s ease, background 0.15s ease;
}
.project-card:hover {
  border-color: var(--text-muted);
  background: var(--bg-hover);
}

.project-card h3 {
  margin: 0 0 0.4rem 0;
  font-size: 1.05rem;
}
.project-card h3 a { color: var(--text); }
.project-card h3 a:hover { color: var(--accent); }

.project-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.project-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.15em 0.6em;
  border-radius: 3px;
  background: var(--bg-hover);
  color: var(--text-muted);
  text-transform: lowercase;
}
.project-badge.active {
  background: rgba(139, 110, 78, 0.15);
  color: var(--accent);
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.5rem;
}

.tech-tag {
  font-size: 0.78rem;
  color: var(--text-muted);
  background: var(--bg);
  padding: 0.15em 0.5em;
  border-radius: 3px;
  border: 1px solid var(--border);
}

.project-link {
  display: inline-block;
  font-size: 0.9rem;
  margin-top: 0.5rem;
}

/* ===== Post / Article ===== */
.post-header {
  margin-bottom: 2rem;
}
.post-header h1 {
  margin-bottom: 0.4rem;
}
.post-header time {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.post-content {
  line-height: 1.75;
}
.post-content h2 { margin-top: 2.5rem; }
.post-content h3 { margin-top: 2rem; }

/* ===== About / Resume ===== */
.about-hero {
  margin-bottom: 2rem;
}

.about-hero p {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text-muted);
}

.about-lead {
  font-family: 'Caveat', cursive;
  font-size: 2rem !important;
  font-weight: 600;
  color: var(--text) !important;
  margin-bottom: 0.5rem;
}

.about-content {
  line-height: 1.75;
}

.resume-section {
  margin-top: 2.5rem;
}

.resume-entry {
  margin-bottom: 1.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}
.resume-entry:last-child {
  border-bottom: none;
}

.resume-entry h3 {
  margin: 0 0 0.15rem 0;
}

.resume-meta {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

/* ===== Timeline (sticky multi-lane) ===== */
.timeline-sticky {
  position: sticky;
  top: var(--header-height, 62px);
  z-index: 100;
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 0.75rem 2rem 0.5rem;
  margin: 0 calc(-50vw + 50%) 2rem;
  width: 100vw;
  transition: background 0.2s ease;
}

.timeline-cursor {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--text);
  opacity: 0.35;
  z-index: 10;
  pointer-events: none;
  transition: left 0.15s ease;
}

.timeline-inner {
  position: relative;
  max-width: 960px;
  margin: 0 auto;
  padding-top: 0.8rem;
  padding-bottom: 1.6rem;
}

/* Year labels row */
.timeline-years {
  position: relative;
  height: 1.2rem;
  margin-bottom: 0.25rem;
}

.timeline-year {
  position: absolute;
  transform: translateX(-50%);
  font-size: 0.68rem;
  color: var(--text-muted);
  user-select: none;
  font-variant-numeric: tabular-nums;
}

/* Each lane */
.timeline-lane {
  position: relative;
  height: 28px;
  display: flex;
  align-items: center;
}

.timeline-lane-label {
  position: absolute;
  left: -2rem;
  width: 2rem;
  font-size: 0.6rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  transform: rotate(180deg);
  text-align: center;
  display: none; /* hidden on narrow screens, labels on tracks instead */
}

.timeline-lane-track {
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 2px;
  background: var(--border);
  transform: translateY(-50%);
  border-radius: 1px;
}

.timeline-fill {
  position: absolute;
  top: 50%;
  height: 4px;
  transform: translateY(-50%);
  border-radius: 2px;
  opacity: 0;
  z-index: 1;
  transition: left 0.3s ease, width 0.3s ease, opacity 0.3s ease;
}

.timeline-fill.visible {
  opacity: 1;
}

/* Dots */
.timeline-dot {
  position: absolute;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2px solid var(--border);
  background: var(--bg);
  cursor: pointer;
  transform: translateX(-50%);
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
  z-index: 2;
  padding: 0;
  overflow: hidden;
}

.timeline-dot.has-icon {
  width: 24px;
  height: 24px;
  background: var(--bg-surface);
}

.timeline-dot.has-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
  display: block;
}

.timeline-dot:hover {
  transform: translateX(-50%) scale(1.25);
  border-color: var(--dot-color, var(--accent));
}

.timeline-dot.active {
  border-color: var(--dot-color, var(--accent));
  transform: translateX(-50%) scale(1.35);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--dot-color, var(--accent)) 25%, transparent);
}

.timeline-dot.active:not(.has-icon) {
  background: var(--dot-color, var(--accent));
}

/* Life event annotations */
.timeline-annotation {
  position: absolute;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  pointer-events: none;
  z-index: 5;
}

.timeline-annotation-label {
  font-family: 'Caveat', cursive;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-muted);
  white-space: nowrap;
  line-height: 1;
}

.timeline-annotation-arrow {
  display: block;
  width: 16px;
  height: 16px;
}

.timeline-annotation-arrow svg {
  width: 100%;
  height: 100%;
  overflow: visible;
}

.timeline-annotation-arrow svg path {
  stroke: var(--text-muted);
  fill: none;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* Below: label on bottom, arrow points up — sits just under the lanes */
.timeline-annotation-below {
  bottom: 6px;
  transform: translateX(-50%);
  flex-direction: column-reverse;
  gap: 3px;
}

/* Legend */
.timeline-legend {
  display: flex;
  justify-content: center;
  gap: 1.2rem;
  margin-top: 0;
  margin-bottom: 0.35rem;
  font-size: 0.68rem;
  color: var(--text-muted);
}

.timeline-legend-item {
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.timeline-legend-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}

/* Resume list below timeline */
.resume-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.resume-item {
  padding: 1.75rem 0.75rem;
  border-bottom: 1px solid var(--border);
  cursor: default;
  transition: background 0.15s ease;
  border-radius: 6px;
  margin: 0 -0.75rem;
}

.resume-item:last-child {
  border-bottom: none;
}

.resume-item:hover,
.resume-item.highlighted {
  background: var(--bg-surface);
}

.resume-item-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.15rem;
}

.resume-item-header h3 {
  margin: 0;
  font-size: 1.05rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.resume-item-icon {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--border);
  flex-shrink: 0;
  vertical-align: middle;
}

.resume-item-dates {
  font-size: 0.85rem;
  color: var(--text-muted);
  white-space: nowrap;
  flex-shrink: 0;
}

.resume-item-badge {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 600;
  color: #fff;
  padding: 0.1em 0.5em;
  border-radius: 3px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.4rem;
}

.resume-item ul {
  padding-left: 1.2rem;
  margin: 0.4rem 0 0 0;
}

.resume-item li {
  font-size: 0.9rem;
  margin-bottom: 0.25rem;
  line-height: 1.6;
  color: var(--text-muted);
}

.resume-item li:last-child {
  margin-bottom: 0;
}

.resume-list {
  padding-bottom: 4rem;
}

/* ===== Footer ===== */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 0;
  margin-top: 1.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

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

.social-links {
  display: flex;
  gap: 0.75rem;
}

.social-links a {
  color: var(--text-muted);
  transition: color 0.15s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
}

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

.footer-tagline {
  text-align: center;
  padding: 2.5rem 0 1.5rem;
  line-height: 1.4;
}

.footer-tagline p {
  margin: 0;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.handwritten {
  font-family: 'Caveat', cursive;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text);
}

.copyright {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  margin: 0;
  letter-spacing: 0.02em;
}

.copyright-symbol {
  font-size: 1.1rem;
  line-height: 1;
  opacity: 0.6;
}

/* ===== Responsive ===== */
@media (max-width: 600px) {
  html { font-size: 16px; }

  .site-header .container {
    flex-direction: row;
    align-items: center;
  }

  .site-title-tagline {
    display: none;
  }

  .site-nav {
    gap: 0.75rem;
  }

  .site-nav a {
    font-size: 0.85rem;
  }

  .post-list li {
    flex-direction: column;
    gap: 0.15rem;
  }

  h1 { font-size: 1.6rem; }
  .home-intro h1 { font-size: 1.8rem; }

  .timeline-sticky {
    padding: 0.5rem 1rem 0.35rem;
  }

  .resume-item-header {
    flex-direction: column;
    gap: 0.15rem;
  }
}

/* ===== Post TOC (table of contents sidebar) ===== */
.post-toc {
  display: none;
}

@media (min-width: 1120px) {
  .post-toc {
    display: block;
    position: fixed;
    top: 8rem;
    left: calc((100vw - 680px) / 2 - 13.5rem);
    width: 12rem;
    max-height: calc(100vh - 12rem);
    overflow-y: auto;
    font-size: 0.85rem;
    line-height: 1.4;
  }
}

.post-toc-label {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.7rem;
  color: var(--text-muted);
  font-weight: 600;
  margin-bottom: 0.6rem;
  padding-left: 0.75rem;
}

.post-toc nav ol {
  list-style: none;
  padding: 0;
  margin: 0;
  border-left: 1px solid var(--border);
}

.post-toc nav li {
  margin: 0;
  padding: 0;
}

.post-toc nav a {
  display: block;
  padding: 0.3rem 0.75rem;
  color: var(--text-muted);
  text-decoration: none;
  border-left: 2px solid transparent;
  margin-left: -1px;
  transition: color 0.15s ease, border-color 0.15s ease;
  line-height: 1.35;
}

.post-toc nav a:hover {
  color: var(--text);
}

.post-toc nav li.active a {
  color: var(--text);
  border-left-color: var(--accent);
}

.post-toc nav li.toc-h3 a {
  padding-left: 1.75rem;
  font-size: 0.8rem;
}