:root {
  --color-bg: #ffffff;
  --color-text: #1a1a1a;
  --color-text-secondary: #555555;
  --color-accent: #2563eb;
  --color-accent-hover: #1d4ed8;
  --color-border: #e5e7eb;
  --color-review-bg: #fef9c3;
  --color-review-text: #854d0e;
  --font-body: 'Inter', sans-serif;
  --font-display: 'Playfair Display', serif;
  --nav-height: 56px;
  --container-max: 760px;
  --section-pad-v: 3.5rem;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-height) + 12px);
}

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  font-size: 16px;
}

a {
  color: var(--color-accent);
  text-decoration: none;
}

a:hover {
  color: var(--color-accent-hover);
  text-decoration: underline;
}

/* ── Navigation ── */

.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  height: var(--nav-height);
}

.nav-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-social {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 1.1rem;
}

.nav-social a {
  font-size: 1.15rem;
  color: var(--color-text);
  text-decoration: none;
  transition: color 0.15s;
  display: flex;
  align-items: center;
}

.nav-social a:hover {
  color: var(--color-accent);
  text-decoration: none;
}

.nav-cv-link {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 1.75rem;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color 0.15s;
}

.nav-links a:hover {
  color: var(--color-accent);
  text-decoration: none;
}

/* ── Container & Sections ── */

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: var(--section-pad-v) 0;
}

.section + .section {
  border-top: 1px solid var(--color-border);
}

/* ── About / Hero ── */

.section-about {
  padding-top: calc(var(--section-pad-v) * 1.4);
}

.hero-name {
  font-family: var(--font-display);
  font-size: 2.4rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1.5rem;
  color: var(--color-text);
}

.about-layout {
  display: flex;
  gap: 2.5rem;
  align-items: flex-start;
}

.about-photo {
  flex: 0 0 auto;
}

.profile-photo {
  width: 200px;
  height: 200px;
  object-fit: cover;
  border-radius: 8px;
  display: block;
}

.about-text {
  flex: 1 1 0;
  min-width: 0;
}

.hero-title {
  font-size: 1rem;
  color: var(--color-text-secondary);
  margin-bottom: 1rem;
}

/* ── Bio ── */

.bio p {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--color-text);
}

.bio p + p {
  margin-top: 0.9rem;
}

.contact-line {
  color: var(--color-text-secondary);
}

/* ── Publications ── */

.section-title {
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--color-text);
}

.pub-note {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-bottom: 1.75rem;
}

.pub-list {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.pub-item {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 1.25rem;
  align-items: start;
}

.pub-badge {
  display: block;
  font-size: 0.72rem;
  font-weight: 700;
  color: #ffffff;
  background: #c026d3;
  border-radius: 4px;
  padding: 0.25rem 0.55rem;
  text-align: center;
  margin-top: 0.2rem;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.pub-badge--review {
  background: #6b7280;
}

.pub-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 0.3rem;
  line-height: 1.4;
}

.pub-authors {
  font-size: 0.9rem;
  color: var(--color-text);
  margin-bottom: 0.25rem;
}

.self-author {
  font-weight: 700;
  color: var(--color-text);
}

.pub-venue-full {
  font-size: 0.88rem;
  color: var(--color-text-secondary);
  line-height: 1.55;
  margin-bottom: 0.5rem;
}

.pub-links {
  display: flex;
  gap: 0.45rem;
  flex-wrap: wrap;
}

.pub-btn {
  display: inline-block;
  font-size: 0.73rem;
  font-weight: 600;
  font-family: var(--font-body);
  letter-spacing: 0.04em;
  padding: 0.2rem 0.65rem;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  background: var(--color-bg);
  color: var(--color-text);
  text-decoration: none;
  transition: border-color 0.15s, background 0.15s;
}

.pub-btn:hover {
  border-color: var(--color-text-secondary);
  background: #f9fafb;
  text-decoration: none;
  color: var(--color-text);
}

/* ── Footer ── */

.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 1.5rem 0;
  margin-top: 2rem;
}

.site-footer p {
  font-size: 0.82rem;
  color: var(--color-text-secondary);
  text-align: center;
}

/* ── Responsive ── */

@media (max-width: 600px) {
  :root {
    --section-pad-v: 2rem;
  }

  .hero-name {
    font-size: 1.85rem;
    margin-bottom: 1.25rem;
  }

  .about-layout {
    flex-direction: column;
    gap: 1.5rem;
  }

  .profile-photo {
    width: 160px;
    height: 160px;
  }

  .nav-social {
    gap: 0.85rem;
  }

  .nav-links {
    gap: 1rem;
  }

  .pub-item {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }

  .pub-badge {
    width: fit-content;
    margin-top: 0;
  }
}