@import url('https://fonts.googleapis.com/css2?family=Space+Mono:ital,wght@0,400;0,700;1,400&display=swap');

:root {
  --bg: #f8f7f4;
  --text: #1a1a1a;
  --muted: #888;
  --accent: #c46e3c;
  --border: #e0dbd3;
  --link: #1a1a1a;
  --max-width: 760px;
  --mono: 'Space Mono', 'Courier New', monospace;
  --serif: 'Space Mono', 'Courier New', monospace;
  --sans: 'Space Mono', 'Courier New', monospace;
}

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

html { font-size: 16px; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--mono);
  font-weight: 400;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

/* ── Background canvas ── */
#bg-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

.page-content, nav, footer {
  position: relative;
  z-index: 1;
}

/* ── Layout ── */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

/* ── Nav ── */
nav {
  padding: 2.5rem 0 0;
  margin-bottom: 5rem;
}

nav .container {
  display: flex;
  align-items: baseline;
  gap: 2.5rem;
}

nav .site-name {
  font-family: var(--mono);
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text);
  text-decoration: none;
  margin-right: auto;
}

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

nav a {
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: lowercase;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s;
}

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

/* ── Homepage ── */
.home-hero {
  display: grid;
  grid-template-columns: 1fr 220px;
  gap: 3rem;
  align-items: center;
  margin-bottom: 5rem;
}

.home-hero .bio h1 {
  font-family: var(--mono);
  font-size: 1.9rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1.2rem;
  letter-spacing: -0.02em;
}

.home-hero .bio h1 em {
  font-style: italic;
  color: var(--accent);
  font-weight: 400;
}

.home-hero .bio p {
  font-size: 0.82rem;
  color: #444;
  margin-bottom: 1rem;
  line-height: 1.85;
}

.home-hero .bio .links {
  display: flex;
  gap: 1.2rem;
  margin-top: 1.5rem;
  flex-wrap: wrap;
}

.home-hero .bio .links a {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid var(--border);
  padding-bottom: 1px;
  transition: color 0.2s, border-color 0.2s;
}

.home-hero .bio .links a:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.home-hero .profile-img {
  width: 220px;
  height: 270px;
  object-fit: cover;
  filter: grayscale(15%);
}

/* ── News Section ── */
.section {
  margin-bottom: 4.5rem;
}

.section-title {
  font-family: var(--sans);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}

.news-list {
  list-style: none;
}

.news-list li {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 1.5rem;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.88rem;
  align-items: baseline;
}

.news-list li:last-child { border-bottom: none; }

.news-list .date {
  color: var(--muted);
  font-size: 0.78rem;
  letter-spacing: 0.03em;
  white-space: nowrap;
}

/* ── Blog ── */
.blog-filters {
  display: flex;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.filter-btn {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
  padding: 0.3rem 0.8rem;
  border: 1px solid var(--border);
  border-radius: 2px;
  transition: all 0.2s;
  cursor: pointer;
  background: none;
}

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

.filter-btn.science.active { background: #2d5a8e; border-color: #2d5a8e; color: white; }
.filter-btn.sewing.active { background: #8e2d5a; border-color: #8e2d5a; color: white; }

.post-list {
  list-style: none;
}

.post-item {
  padding: 1.8rem 0;
  border-bottom: 1px solid var(--border);
}

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

.post-item .post-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.5rem;
}

.post-item .post-date {
  font-size: 0.78rem;
  color: var(--muted);
  letter-spacing: 0.03em;
}

.post-tag {
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.15rem 0.5rem;
  border-radius: 2px;
  font-weight: 500;
}

.post-tag.science { background: #eaf0f8; color: #2d5a8e; }
.post-tag.sewing { background: #f8eaf3; color: #8e2d5a; }

.post-item h2 {
  font-family: var(--mono);
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
  line-height: 1.35;
}

.post-item h2 a {
  text-decoration: none;
  color: var(--text);
  transition: color 0.2s;
}

.post-item h2 a:hover { color: var(--accent); }

.post-item .post-excerpt {
  font-size: 0.88rem;
  color: #555;
  line-height: 1.7;
}

/* ── Research cards ── */
.research-grid {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.research-item {
  padding: 1.8rem 0;
  border-bottom: 1px solid var(--border);
}

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

.research-item .venue {
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.4rem;
}

.research-item h3 {
  font-family: var(--mono);
  font-size: 0.92rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 0.4rem;
}

.research-item .authors {
  font-size: 0.82rem;
  color: #666;
  margin-bottom: 0.6rem;
}

.research-item .authors strong { color: var(--text); font-weight: 500; }

.paper-links { display: flex; gap: 0.8rem; }

.paper-link {
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--muted);
  border-bottom: 1px solid var(--border);
  padding-bottom: 1px;
  transition: all 0.2s;
}

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

/* ── Single post ── */
.post-single {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

.post-single header {
  margin-bottom: 3rem;
}

.post-single header h1 {
  font-family: var(--mono);
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 1rem;
}

.post-single .post-info {
  display: flex;
  align-items: center;
  gap: 1rem;
  color: var(--muted);
  font-size: 0.82rem;
}

.post-single .content {
  font-size: 0.95rem;
  line-height: 1.85;
}

.post-single .content p { margin-bottom: 1.4rem; }

.post-single .content h2 {
  font-family: var(--mono);
  font-size: 1.15rem;
  font-weight: 700;
  margin: 2.5rem 0 1rem;
}

.post-single .content h3 {
  font-family: var(--sans);
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 2rem 0 0.8rem;
}

.post-single .content a {
  color: var(--text);
  border-bottom: 1px solid var(--border);
  text-decoration: none;
  transition: border-color 0.2s;
}

.post-single .content a:hover { border-color: var(--accent); }

.post-single .content blockquote {
  border-left: 2px solid var(--accent);
  padding-left: 1.5rem;
  color: #555;
  font-style: italic;
  font-family: var(--mono);
  font-size: 0.88rem;
  margin: 2rem 0;
}

.post-single .content img {
  max-width: 100%;
  margin: 2rem 0;
}

.post-single .content code {
  font-size: 0.82rem;
  background: #f0ece6;
  padding: 0.15rem 0.4rem;
  border-radius: 2px;
}

.post-single .content pre {
  background: #f0ece6;
  padding: 1.5rem;
  overflow-x: auto;
  border-radius: 2px;
  margin: 1.5rem 0;
}

.post-single .content pre code { background: none; padding: 0; }

/* ── CV ── */
.cv-section { margin-bottom: 3rem; }

.cv-section h2 {
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 1.2rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--border);
}

.cv-entry {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 1.5rem;
  padding: 0.8rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.88rem;
}

.cv-entry:last-child { border-bottom: none; }

.cv-entry .cv-date {
  color: var(--muted);
  font-size: 0.78rem;
  padding-top: 0.1rem;
}

.cv-entry .cv-body strong { font-weight: 500; }
.cv-entry .cv-body em { color: var(--muted); font-style: normal; }

/* ── Footer ── */
footer {
  margin-top: 6rem;
  padding: 2.5rem 0;
  border-top: 1px solid var(--border);
}

footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.78rem;
  color: var(--muted);
}

/* ── Utilities ── */
a { color: var(--link); }

/* ── Responsive ── */
@media (max-width: 640px) {
  html { font-size: 16px; }

  nav .container { flex-wrap: wrap; gap: 1rem; }
  nav .site-name { width: 100%; margin-right: 0; }

  .home-hero {
    grid-template-columns: 1fr;
  }

  .home-hero .profile-img {
    width: 160px;
    height: 195px;
    order: -1;
  }

  .home-hero .bio h1 { font-size: 2rem; }

  .news-list li { grid-template-columns: 80px 1fr; gap: 1rem; }

  .cv-entry { grid-template-columns: 1fr; gap: 0.3rem; }

  footer .container { flex-direction: column; gap: 0.5rem; text-align: center; }
}

/* ── Page transitions ── */
.page-content {
  animation: fadeUp 0.35s ease both;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}