/* ==========================================================================
   Andrea Blasco — Academic Profile
   Modern, minimalist stylesheet
   ========================================================================== */

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

:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f8f9fa;
  --color-text: #2d3436;
  --color-text-light: #636e72;
  --color-accent: #2c3e7a;
  --color-accent-hover: #1a2a5e;
  --color-border: #e0e3e8;
  --color-tag-bg: #eef1f6;
  --color-tag-text: #2c3e7a;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-serif: 'Source Serif 4', Georgia, 'Times New Roman', serif;
  --max-width: 960px;
  --header-height: 64px;
  --radius: 6px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --transition: 0.2s ease;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 24px);
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* --- Skip Link (Accessibility) --- */
.skip-link {
  position: absolute;
  top: -100%;
  left: 16px;
  z-index: 1000;
  padding: 8px 16px;
  background: var(--color-accent);
  color: #fff;
  border-radius: var(--radius);
  font-size: 0.875rem;
  text-decoration: none;
  transition: top var(--transition);
}

.skip-link:focus {
  top: 8px;
}

/* --- Container --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Header & Navigation --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav-brand {
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

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

.nav-links {
  display: flex;
  gap: 4px;
  list-style: none;
}

.nav-links a {
  display: block;
  padding: 6px 12px;
  font-size: 0.875rem;
  font-weight: 450;
  color: var(--color-text-light);
  text-decoration: none;
  border-radius: var(--radius);
  transition: color var(--transition), background var(--transition);
}

.nav-links a:hover,
.nav-links a:focus,
.nav-links a.is-active {
  color: var(--color-accent);
  background: var(--color-tag-bg);
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 6px;
  background: none;
  border: none;
  cursor: pointer;
  border-radius: var(--radius);
  transition: background var(--transition);
}

.nav-toggle:hover {
  background: var(--color-bg-alt);
}

.nav-toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-text);
  border-radius: 1px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* --- Sections --- */
.section {
  padding: 80px 0;
}

.section-alt {
  background-color: var(--color-bg-alt);
}

.section-intro {
  font-size: 1.05rem;
  color: var(--color-text-light);
  margin-bottom: 24px;
  max-width: 680px;
}

/* --- Typography --- */
h1 {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.2;
  color: var(--color-text);
}

h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 32px;
  color: var(--color-text);
}

h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--color-text);
}

p {
  margin-bottom: 12px;
}

p:last-child {
  margin-bottom: 0;
}

a {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
  transition: color var(--transition);
}

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

/* --- Hero Section --- */
.hero {
  padding-top: 100px;
  padding-bottom: 80px;
}

.hero-content {
  margin-bottom: 40px;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--color-text-light);
  margin-top: 12px;
  font-weight: 400;
}

.hero-affiliation {
  font-size: 0.95rem;
  color: var(--color-text-light);
  margin-top: 8px;
}

.hero-location {
  font-size: 0.9rem;
  color: var(--color-text-light);
  margin-top: 4px;
}

.about-text {
  max-width: 720px;
  margin-bottom: 48px;
}

.about-text p {
  font-size: 1.05rem;
  line-height: 1.8;
}

/* --- Competencies / Tags --- */
.competencies h2 {
  font-size: 1.2rem;
  margin-bottom: 16px;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
}

.tag-list li {
  padding: 6px 14px;
  background: var(--color-tag-bg);
  color: var(--color-tag-text);
  font-size: 0.825rem;
  font-weight: 500;
  border-radius: 20px;
  white-space: nowrap;
}

/* --- Research Cards --- */
.research-areas {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.research-card {
  padding: 28px;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: box-shadow var(--transition), transform var(--transition);
}

.research-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.research-card h3 {
  color: var(--color-accent);
  margin-bottom: 12px;
}

.research-card p {
  font-size: 0.925rem;
  color: var(--color-text-light);
  line-height: 1.65;
}

/* --- Publications --- */
.publications-note {
  font-size: 0.95rem;
  color: var(--color-text-light);
  font-style: italic;
}

#publications-list h3 {
  font-size: 1.15rem;
  margin-top: 32px;
  margin-bottom: 16px;
  color: var(--color-text);
}

#publications-list h3:first-child {
  margin-top: 0;
}

.pub-list {
  list-style: none;
  counter-reset: pub-counter;
  padding: 0;
}

.pub-list[reversed] {
  counter-reset: none;
}

.pub-item {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--color-border);
}

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

.pub-year {
  font-size: 0.825rem;
  font-weight: 600;
  color: var(--color-accent);
  padding-top: 2px;
  white-space: nowrap;
}

.pub-details {
  min-width: 0;
}

.pub-title {
  font-weight: 600;
  font-size: 0.95rem;
  line-height: 1.5;
  margin-bottom: 4px;
  color: var(--color-text);
}

.pub-authors {
  font-size: 0.875rem;
  color: var(--color-text-light);
  margin-bottom: 4px;
  line-height: 1.6;
}

.pub-authors strong {
  color: var(--color-text);
  font-weight: 600;
}

.pub-venue {
  font-size: 0.85rem;
  color: var(--color-text-light);
  margin-bottom: 6px;
}

.pub-venue em {
  font-style: italic;
}

.pub-link {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-accent);
  text-decoration: none;
  padding: 3px 10px;
  border: 1px solid var(--color-accent);
  border-radius: 20px;
  margin-top: 4px;
  transition: background var(--transition), color var(--transition);
}

.pub-link:hover,
.pub-link:focus {
  background: var(--color-accent);
  color: #fff;
}

.pub-loading {
  font-size: 0.925rem;
  color: var(--color-text-light);
  font-style: italic;
}

.pub-error {
  font-size: 0.925rem;
  color: var(--color-text-light);
  font-style: italic;
}

@media (max-width: 768px) {
  .pub-item {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .pub-year {
    font-size: 0.8rem;
  }
}

/* --- Timeline (Experience) --- */
.timeline {
  position: relative;
  padding-left: 32px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--color-border);
  border-radius: 1px;
}

.timeline-item {
  position: relative;
  margin-bottom: 48px;
}

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

.timeline-marker {
  position: absolute;
  left: -32px;
  top: 8px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-bg);
  border: 3px solid var(--color-accent);
}

.timeline-content h3 {
  font-size: 1.15rem;
  margin-bottom: 4px;
}

.timeline-meta {
  font-size: 0.875rem;
  color: var(--color-text-light);
  margin-bottom: 12px;
  font-weight: 450;
}

.timeline-content ul {
  margin-top: 12px;
  padding-left: 20px;
}

.timeline-content li {
  font-size: 0.925rem;
  line-height: 1.7;
  margin-bottom: 6px;
  color: var(--color-text-light);
}

/* --- Teaching Grid --- */
.teaching-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.teaching-card {
  padding: 24px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: box-shadow var(--transition);
}

.teaching-card:hover {
  box-shadow: var(--shadow-sm);
}

.teaching-card h3 {
  font-size: 1rem;
  margin-bottom: 6px;
}

.teaching-meta {
  font-size: 0.85rem;
  color: var(--color-text-light);
  font-weight: 450;
}

/* --- Education --- */
.education-list {
  display: flex;
  flex-direction: column;
  gap: 32px;
  margin-bottom: 48px;
}

.education-item h3 {
  font-size: 1.1rem;
  margin-bottom: 4px;
}

.education-meta {
  font-size: 0.875rem;
  color: var(--color-text-light);
  font-weight: 450;
  margin-bottom: 6px;
}

.dissertation {
  font-size: 0.925rem;
  color: var(--color-text-light);
}

.subsection-heading {
  font-size: 1.05rem;
  margin-bottom: 16px;
  padding-top: 8px;
  border-top: 1px solid var(--color-border);
  padding-top: 24px;
}

.development-list {
  padding-left: 20px;
}

.development-list li {
  font-size: 0.925rem;
  line-height: 1.8;
  color: var(--color-text-light);
}

/* --- Awards --- */
.awards-list {
  list-style: none;
  margin-bottom: 48px;
}

.awards-list li {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--color-border);
}

.awards-list li:first-child {
  padding-top: 0;
}

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

.award-year {
  font-size: 0.825rem;
  font-weight: 600;
  color: var(--color-accent);
  white-space: nowrap;
  min-width: 44px;
}

.award-title {
  font-size: 0.95rem;
}

/* Talks */
.talks-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 8px 24px;
  list-style: none;
}

.talks-list li {
  font-size: 0.9rem;
  color: var(--color-text-light);
  padding: 6px 0;
  border-bottom: 1px solid var(--color-border);
}

/* --- Skills --- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 40px;
}

.skills-group h3 {
  font-size: 1rem;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-light);
  font-weight: 600;
}

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

.skills-list li {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 10px 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.925rem;
}

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

.skill-name {
  font-weight: 500;
}

.skill-level {
  font-size: 0.825rem;
  color: var(--color-text-light);
  text-align: right;
}

/* --- Contact --- */
.contact-content {
  max-width: 600px;
}

.contact-content > p {
  font-size: 1.05rem;
  margin-bottom: 24px;
}

.contact-details {
  padding: 24px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
}

.contact-details p {
  font-size: 0.95rem;
  margin-bottom: 8px;
}

.contact-details a {
  font-weight: 500;
}

/* --- Footer --- */
.site-footer {
  padding: 32px 0;
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.site-footer p {
  font-size: 0.825rem;
  color: var(--color-text-light);
}

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

@media (max-width: 768px) {
  :root {
    --header-height: 56px;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--color-border);
    padding: 12px 24px;
    gap: 0;
    display: none;
    box-shadow: var(--shadow-md);
  }

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

  .nav-links a {
    padding: 12px 8px;
    font-size: 1rem;
  }

  .section {
    padding: 56px 0;
  }

  .hero {
    padding-top: 64px;
    padding-bottom: 56px;
  }

  .timeline {
    padding-left: 24px;
  }

  .timeline::before {
    left: 5px;
  }

  .timeline-marker {
    left: -24px;
    width: 12px;
    height: 12px;
    border-width: 2px;
  }

  .awards-list li {
    flex-direction: column;
    gap: 4px;
  }

  .skills-list li {
    flex-direction: column;
    gap: 2px;
    align-items: flex-start;
  }

  .skill-level {
    text-align: left;
  }

  .talks-list {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  h1 {
    font-size: 1.75rem;
  }

  h2 {
    font-size: 1.35rem;
  }

  .tag-list li {
    font-size: 0.775rem;
    padding: 5px 10px;
  }

  .research-areas {
    grid-template-columns: 1fr;
  }

  .teaching-grid {
    grid-template-columns: 1fr;
  }
}

/* --- Print --- */
@media print {
  .site-header,
  .nav-toggle,
  .skip-link {
    display: none;
  }

  .section {
    padding: 24px 0;
    break-inside: avoid;
  }

  body {
    font-size: 11pt;
    line-height: 1.5;
  }

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

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

  .nav-links a[href]::after {
    content: none;
  }
}

/* --- Focus Styles (Accessibility) --- */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 2px;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}