/* ========================================
   Portfolio — Minimalist Times New Roman
   ======================================== */

:root {
  --font-main: 'Times New Roman', Georgia, serif;
  --bg: #ffffff;
  --text: #1a1a1a;
  --text-light: #666666;
  --text-muted: #999999;
  --accent: #2244cc;
  --border: #e0e0e0;
  --border-light: #f0f0f0;
  --max-width: 960px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-main);
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-decoration: none;
  text-decoration-skip-ink: auto;
}
a:hover {
  text-decoration: underline wavy;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

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

h1, h2, h3, h4 {
  font-weight: 400;
  line-height: 1.3;
}

h1 { font-size: 2.8rem; letter-spacing: -0.02em; }
h2 { font-size: 1.8rem; margin-bottom: 1rem; }
h3 { font-size: 1.25rem; }

/* ========================================
   Navigation
   ======================================== */

.site-nav {
  position: fixed;
  top: 0;
  width: 100%;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 100;
  border-bottom: 1px solid var(--border);
}

.nav-name {
  font-size: 1.1rem;
  font-weight: 400;
  color: var(--text);
  letter-spacing: 0.02em;
}

.nav-name:hover { text-decoration: none; }

.nav-links { display: flex; gap: 2rem; }

.nav-links a {
  font-size: 0.95rem;
  color: var(--text-light);
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--text);
  text-decoration: underline wavy;
  text-decoration-color: var(--text-muted);
  text-underline-offset: 4px;
  text-decoration-thickness: 1px;
}

.nav-links a.active {
  color: var(--text);
  border-bottom: 1px solid var(--text);
}

.nav-hamburger {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text);
  padding: 0.25rem;
}

/* ========================================
   Page Layout
   ======================================== */

main {
  padding-top: 5rem;
  animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.page-header {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 3rem 2rem 2rem;
}

.page-header p {
  color: var(--text-light);
  font-size: 1.1rem;
  margin-top: 0.5rem;
}

.site-footer {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 3rem 2rem;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.85rem;
  text-align: center;
}

/* ========================================
   Landing Page
   ======================================== */

.landing {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 100vh;
  padding-top: 4rem;
}

.landing-intro {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 4rem 3rem 4rem 4rem;
}

.landing-intro h1 {
  font-size: 3.2rem;
  margin-bottom: 0.5rem;
}

.landing-intro .tagline {
  font-size: 1.15rem;
  color: var(--text-light);
  font-style: italic;
  margin-bottom: 2rem;
}

.portrait {
  width: 300px;
  height: 300px;
  object-fit: cover;
  border-radius: 4px;
  margin-bottom: 1.5rem;
  filter: grayscale(10%);
}

.landing-intro .bio {
  font-size: 1rem;
  color: var(--text-light);
  line-height: 1.8;
  max-width: 420px;
}

.landing-intro .bio a {
  border-bottom: none;
}

.landing-viz {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 500px;
  overflow: hidden;
}

.landing-viz canvas {
  width: 100% !important;
  height: 100% !important;
  display: block;
}

#scatter-tooltip {
  position: absolute;
  background: rgba(255,255,255,0.95);
  border: 1px solid var(--border);
  padding: 0.4rem 0.7rem;
  font-family: var(--font-main);
  font-size: 0.85rem;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s;
  z-index: 10;
  white-space: nowrap;
}

#scatter-tooltip.visible { opacity: 1; }

.viz-caption {
  position: absolute;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.8rem;
  color: var(--text-muted);
  font-style: italic;
}

/* ========================================
   Experience Page — Timeline
   ======================================== */

.timeline-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem 4rem;
  position: relative;
}

.timeline-line {
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--border);
  transform: translateX(-50%);
}

.timeline-entry {
  display: flex;
  align-items: flex-start;
  margin-bottom: 3rem;
  position: relative;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.timeline-entry.visible {
  opacity: 1;
  transform: translateY(0);
}

.timeline-entry:nth-child(odd) {
  flex-direction: row;
  padding-right: calc(50% + 2rem);
  text-align: right;
}

.timeline-entry:nth-child(even) {
  flex-direction: row-reverse;
  padding-left: calc(50% + 2rem);
}

.timeline-dot {
  position: absolute;
  left: 50%;
  top: 0.5rem;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  transform: translateX(-50%);
  z-index: 2;
  transition: transform 0.2s;
}

.timeline-entry:hover .timeline-dot {
  transform: translateX(-50%) scale(1.4);
}

.timeline-card {
  padding: 1.5rem;
  border: 1px solid var(--border);
  transition: box-shadow 0.2s, transform 0.2s;
  cursor: default;
  width: 100%;
}

.timeline-card:hover {
  box-shadow: 0 4px 20px rgba(0,0,0,0.06);
  transform: translateY(-2px);
}

.timeline-card time {
  font-size: 0.85rem;
  color: var(--text-muted);
  display: block;
  margin-bottom: 0.3rem;
}

.timeline-card h3 {
  font-size: 1.15rem;
  margin-bottom: 0.2rem;
}

.timeline-card .org {
  font-style: italic;
  color: var(--text-light);
  font-size: 0.95rem;
  display: block;
  margin-bottom: 0.5rem;
}

.timeline-card .detail {
  font-size: 0.9rem;
  color: var(--text-light);
  line-height: 1.6;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, opacity 0.3s ease;
  opacity: 0;
}

.timeline-card.expanded .detail {
  max-height: 300px;
  opacity: 1;
}

.timeline-card .expand-hint {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.5rem;
  transition: opacity 0.2s;
}

/* Section headers within timeline */
.timeline-section-label {
  text-align: center;
  margin: 2rem 0 1rem;
  position: relative;
  z-index: 2;
}

.timeline-section-label span {
  background: var(--bg);
  padding: 0 1rem;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

/* Education section */
.education-section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem 4rem;
}

.edu-card {
  border: 1px solid var(--border);
  padding: 2rem;
  transition: box-shadow 0.2s;
}

.edu-card:hover {
  box-shadow: 0 4px 20px rgba(0,0,0,0.06);
}

.edu-card h3 {
  margin-bottom: 0.3rem;
}

.edu-card p {
  color: var(--text-light);
  font-size: 0.95rem;
}

/* ========================================
   Writing Page
   ======================================== */

.writing-page {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

.filter-row {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.filter-btn {
  background: none;
  border: 1px solid var(--border);
  padding: 0.35rem 1rem;
  font-family: var(--font-main);
  font-size: 0.85rem;
  color: var(--text-light);
  cursor: pointer;
  transition: all 0.2s;
}

.filter-btn:hover {
  border-color: var(--text);
  color: var(--text);
}

.filter-btn.active {
  background: var(--text);
  color: var(--bg);
  border-color: var(--text);
}

.sort-row {
  margin-bottom: 2rem;
}

.sort-row select {
  font-family: var(--font-main);
  font-size: 0.9rem;
  padding: 0.3rem 0.5rem;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
}

.writing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-bottom: 4rem;
}

.writing-card {
  border: 1px solid var(--border);
  padding: 1.5rem;
  transition: box-shadow 0.2s, transform 0.2s, border-color 0.2s;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.writing-card::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--accent);
  transform: scaleY(0);
  transition: transform 0.3s ease;
  transform-origin: bottom;
}

.writing-card:hover::before { transform: scaleY(1); }

.writing-card:hover {
  box-shadow: 0 4px 20px rgba(0,0,0,0.06);
  transform: translateY(-2px);
}

.writing-card.featured {
  grid-column: span 2;
  border-color: var(--accent);
}

.writing-card h3 {
  margin-bottom: 0.4rem;
}

.writing-card .excerpt {
  font-size: 0.9rem;
  color: var(--text-light);
  line-height: 1.6;
  margin-bottom: 0.5rem;
}

.writing-card .meta {
  font-size: 0.8rem;
  color: var(--text-muted);
  display: flex;
  gap: 1rem;
}

.writing-card .tag {
  display: inline-block;
  font-size: 0.75rem;
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 0.1rem 0.4rem;
  margin-right: 0.3rem;
  margin-top: 0.5rem;
}

/* Article expanded view */
.article-view {
  max-width: 680px;
  margin: 0 auto;
  padding: 2rem;
}

.article-view .back-link {
  display: inline-block;
  margin-bottom: 2rem;
  font-size: 0.9rem;
}

.article-view h1 {
  font-size: 2.2rem;
  margin-bottom: 0.5rem;
}

.article-view .article-meta {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.article-view .article-body {
  font-size: 1.05rem;
  line-height: 1.8;
}

.article-view .article-body p {
  margin-bottom: 1.2rem;
}

/* Guestbook */
.guestbook-section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 3rem 2rem 4rem;
  border-top: 1px solid var(--border);
}

.guestbook-form {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.guestbook-form input,
.guestbook-form textarea {
  font-family: var(--font-main);
  font-size: 0.95rem;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
}

.guestbook-form input { flex: 0 0 180px; }
.guestbook-form textarea { flex: 1; min-width: 200px; resize: vertical; min-height: 40px; }

.guestbook-form button {
  font-family: var(--font-main);
  font-size: 0.9rem;
  padding: 0.5rem 1.25rem;
  background: var(--text);
  color: var(--bg);
  border: none;
  cursor: pointer;
  transition: opacity 0.2s;
}

.guestbook-form button:hover { opacity: 0.8; }

.guestbook-entries { list-style: none; }

.guestbook-entry {
  padding: 1rem 0;
  border-bottom: 1px solid var(--border-light);
}

.guestbook-entry .gb-name {
  font-weight: 600;
  font-size: 0.95rem;
}

.guestbook-entry .gb-date {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-left: 0.5rem;
}

.guestbook-entry .gb-message {
  font-size: 0.9rem;
  color: var(--text-light);
  margin-top: 0.2rem;
}

/* ========================================
   Press Page
   ======================================== */

.press-page {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

.press-list {
  margin-bottom: 4rem;
}

.press-item {
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border-light);
}

.press-item:first-child {
  padding-top: 0;
}

.press-item time {
  font-size: 0.85rem;
  color: var(--text-muted);
  display: block;
  margin-bottom: 0.3rem;
}

.press-item h3 {
  font-size: 1.15rem;
  margin-bottom: 0.2rem;
}

.press-item .press-outlet {
  font-size: 0.9rem;
  color: var(--text-light);
  font-style: italic;
}

/* ========================================
   Contact Page
   ======================================== */

.contact-page {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1rem;
  margin-bottom: 4rem;
}

.contact-item {
  display: block;
  padding: 1.25rem;
  border: 1px solid var(--border);
  color: var(--text);
  transition: box-shadow 0.2s, transform 0.2s, border-color 0.2s;
}

.contact-item:hover {
  box-shadow: 0 4px 20px rgba(0,0,0,0.06);
  transform: translateY(-2px);
  text-decoration: none;
  border-color: var(--accent);
}

.contact-label {
  display: block;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 0.2rem;
}

.contact-value {
  font-size: 1rem;
}

.copied-toast {
  display: inline-block;
  font-size: 0.8rem;
  color: var(--accent);
  margin-left: 0.5rem;
  opacity: 0;
  transition: opacity 0.3s;
}

.copied-toast.show { opacity: 1; }

/* Passions */
.passions-section,
.skills-section {
  margin-bottom: 3rem;
}

.passions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.passion-card {
  padding: 1.25rem;
  border: 1px solid var(--border);
  font-size: 1rem;
  text-align: center;
  transition: box-shadow 0.2s, transform 0.2s;
}

.passion-card:hover {
  box-shadow: 0 4px 20px rgba(0,0,0,0.06);
  transform: translateY(-2px);
}

.skills-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.skill-tag {
  font-size: 0.85rem;
  padding: 0.3rem 0.8rem;
  border: 1px solid var(--border);
  color: var(--text-light);
  transition: all 0.2s;
}

.skill-tag:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ========================================
   404 Page
   ======================================== */

.not-found {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 80vh;
  text-align: center;
  padding: 2rem;
}

.not-found h1 {
  font-size: 6rem;
  font-weight: 400;
  color: var(--border);
  line-height: 1;
}

.not-found p {
  color: var(--text-light);
  margin: 1rem 0 2rem;
}

/* ========================================
   Responsive
   ======================================== */

@media (max-width: 768px) {
  .site-nav {
    padding: 0.75rem 1.25rem;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(255,255,255,0.98);
    flex-direction: column;
    padding: 1rem 1.25rem;
    gap: 0.75rem;
    border-bottom: 1px solid var(--border);
  }

  .nav-links.open { display: flex; }

  .nav-hamburger { display: block; }

  h1 { font-size: 2rem; }

  .landing {
    grid-template-columns: 1fr;
    padding-top: 4rem;
  }

  .landing-intro {
    padding: 2rem 1.5rem;
    align-items: center;
    text-align: center;
  }

  .landing-intro .bio { max-width: 100%; }

  .portrait {
    width: 240px;
    height: 240px;
  }

  .landing-viz {
    min-height: 350px;
    padding: 0 1rem 2rem;
  }

  /* Timeline mobile: single column */
  .timeline-line { left: 1.25rem; }

  .timeline-entry,
  .timeline-entry:nth-child(odd),
  .timeline-entry:nth-child(even) {
    flex-direction: row;
    padding-left: 3rem;
    padding-right: 0;
    text-align: left;
  }

  .timeline-dot,
  .timeline-entry:nth-child(odd) .timeline-dot,
  .timeline-entry:nth-child(even) .timeline-dot {
    left: 1.25rem;
  }

  .writing-card.featured { grid-column: span 1; }

  .page-header { padding: 2rem 1.5rem 1.5rem; }

  .guestbook-form { flex-direction: column; }
  .guestbook-form input { flex: none; }
}

/* ========================================
   Print
   ======================================== */

@media print {
  .site-nav, .site-footer, .guestbook-section,
  .landing-viz, .filter-row, .sort-row { display: none; }

  main { padding-top: 0; }

  body { font-size: 11pt; }

  .timeline-entry { opacity: 1 !important; transform: none !important; }

  a { color: var(--text); }
  a::after { content: ' (' attr(href) ')'; font-size: 0.8em; color: var(--text-light); }
}