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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 70px;
}

body {
  font-family: 'Source Sans 3', 'Segoe UI', system-ui, sans-serif;
  font-size: 24px;
  line-height: 1.7;
  color: #2c2c2c;
  background: #fff;
}

a {
  color: #b31b1b;
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: #8b1515;
  text-decoration: underline;
}

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

/* ===== Layout ===== */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 48px;
}

.section {
  padding: 88px 0;
}

.section-alt {
  background: #faf9f7;
}

/* ===== Header / Nav ===== */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: #fff;
  border-bottom: 1px solid #e8e5e0;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
}

nav {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 48px;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-name {
  font-weight: 700;
  font-size: 1.6rem;
  color: #2c2c2c;
  letter-spacing: 0.01em;
}

.nav-name:hover {
  color: #b31b1b;
  text-decoration: none;
}

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

.nav-links a {
  font-size: 1.3rem;
  font-weight: 500;
  color: #555;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.nav-links a:hover,
.nav-links a.active {
  color: #b31b1b;
  text-decoration: none;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: #555;
}

/* ===== About Section ===== */
.about-grid {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 64px;
  align-items: start;
}

.about-photo img {
  width: 360px;
  height: 300px;
  object-fit: cover;
  object-position: 47% 15%;
  border-radius: 6px;
  background: #e8e5e0;
}

h1 {
  font-size: 2.8rem;
  font-weight: 700;
  color: #1a1a1a;
  margin-bottom: 4px;
}

.subtitle {
  font-size: 1.1rem;
  font-weight: 600;
  color: #b31b1b;
  margin-bottom: 2px;
}

.affiliation {
  font-size: 0.95rem;
  color: #666;
  margin-bottom: 20px;
  line-height: 1.5;
}

.about-text p {
  margin-bottom: 14px;
}

.contact-list {
  list-style: none;
  margin-top: 18px;
  padding: 16px 0 0;
  border-top: 1px solid #e8e5e0;
}

.photo-name {
  font-size: 1.4rem;
  margin-top: 10px;
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
  display: block;
}

.photo-contact {
  border-top: none;
  margin-top: 8px;
  padding-top: 0;
}

.contact-list li {
  margin-bottom: 6px;
  font-size: 1.15rem;
}

/* ===== Section Headings ===== */
h2 {
  font-size: 1.6rem;
  font-weight: 700;
  color: #1a1a1a;
  margin-bottom: 20px;
  padding-bottom: 8px;
  border-bottom: 3px solid #b31b1b;
  display: inline-block;
}

h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: #444;
  margin: 28px 0 12px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

/* ===== Research ===== */
.paper-list {
  padding-left: 20px;
}

.paper-list li {
  margin-bottom: 16px;
}

.paper-title {
  font-weight: 600;
  color: #1a1a1a;
}

.paper-authors {
  font-size: 1.1rem;
  color: #555;
}

.paper-detail {
  font-size: 1.05rem;
  font-style: italic;
  color: #777;
}

.paper-link {
  font-size: 0.88rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.paper-abstract {
  margin-top: 6px;
}

.paper-abstract summary {
  font-size: 0.95rem;
  font-weight: 600;
  color: #b31b1b;
  cursor: pointer;
}

.paper-abstract p {
  margin-top: 6px;
  font-size: 0.95rem;
  color: #555;
  line-height: 1.6;
}

/* ===== CV Button ===== */
.btn {
  display: inline-block;
  margin-top: 12px;
  padding: 10px 28px;
  background: #b31b1b;
  color: #fff;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: 4px;
  transition: background 0.2s;
}

.btn:hover {
  background: #8b1515;
  color: #fff;
  text-decoration: none;
}

/* ===== Resources ===== */
.resource-list {
  list-style: none;
  padding: 0;
}

.resource-list li {
  margin-bottom: 8px;
  padding-left: 16px;
  position: relative;
}

.resource-list li::before {
  content: '›';
  position: absolute;
  left: 0;
  color: #b31b1b;
  font-weight: 700;
}

/* ===== Miscellaneous ===== */
.misc-list {
  list-style: none;
  padding: 0;
}

.misc-list li {
  margin-bottom: 8px;
  padding-left: 16px;
  position: relative;
}

.misc-list li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: #b31b1b;
}

/* ===== Footer ===== */
footer {
  background: #1a1a1a;
  color: #aaa;
  text-align: center;
  padding: 24px 0;
  font-size: 0.85rem;
}

footer a {
  color: #ccc;
}

/* ===== Mobile ===== */
@media (max-width: 700px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 24px;
    text-align: center;
  }

  .about-photo {
    display: flex;
    justify-content: center;
  }

  .about-photo img {
    width: 180px;
    height: 225px;
  }

  .contact-list {
    text-align: left;
  }

  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid #e8e5e0;
    padding: 16px 24px;
    gap: 12px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.06);
  }

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

  .nav-toggle {
    display: block;
  }

  .section {
    padding: 48px 0;
  }

  h1 {
    font-size: 1.6rem;
  }

  h2 {
    font-size: 1.35rem;
  }
}