/* Professional Portfolio Styles for Navid Zarrabi - v1.1 */
:root {
  --bg: #f5f7fa;
  --card: #ffffff;
  --accent: #0066cc;
  --accent-hover: #0052a3;
  --text: #1a1a1a;
  --text-light: #555;
  --border: #e1e4e8;
  --shadow: rgba(0, 0, 0, 0.08);
  --highlight-bg: #f0f7ff;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  padding: 1rem;
}

header {
  background: var(--card);
  padding: 2rem;
  border-radius: 12px;
  margin-bottom: 2rem;
  box-shadow: 0 2px 8px var(--shadow);
  text-align: center;
}

header h1 {
  margin: 0;
  font-size: 2.5rem;
  color: var(--text);
  font-weight: 700;
}

header .subtitle {
  color: var(--text-light);
  font-size: 1.1rem;
  margin: 0.5rem 0 1rem 0;
  font-weight: 500;
}

nav {
  margin-top: 1rem;
  font-size: 1rem;
}

nav a {
  color: var(--accent);
  text-decoration: none;
  padding: 0.5rem 1rem;
  transition: color 0.2s;
}

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

main {
  max-width: 1200px;
  margin: 0 auto;
}

section {
  margin-bottom: 2rem;
}

.hero {
  background: linear-gradient(135deg, #ffffff 0%, #f0f7ff 100%);
  padding: 3rem 2rem;
  border-radius: 12px;
  border-left: 4px solid var(--accent);
  box-shadow: 0 2px 12px var(--shadow);
}

.hero-content {
  display: flex;
  align-items: center;
  gap: 2rem;
  margin-bottom: 1.5rem;
}

.profile-image {
  flex-shrink: 0;
}

.profile-image img {
  width: 180px;
  height: 180px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid var(--accent);
  box-shadow: 0 4px 12px var(--shadow);
}

.hero-text {
  flex: 1;
}

.hero-text p {
  text-align: justify;
}

.hero h2 {
  margin-top: 0;
  color: var(--text);
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.tagline {
  font-size: 1.2rem;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 1rem;
}

.contact-links {
  margin-top: 1.5rem;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
}

.contact-links a {
  background: var(--accent);
  color: white;
  padding: 0.6rem 1.2rem;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 500;
  transition: background 0.2s;
}

.contact-links a:hover {
  background: var(--accent-hover);
}

.content {
  background: var(--card);
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 2px 8px var(--shadow);
}

.content h2 {
  color: var(--text);
  border-bottom: 2px solid var(--accent);
  padding-bottom: 0.5rem;
  margin-bottom: 1.5rem;
}

.content h3 {
  color: var(--accent);
  margin-top: 0;
  margin-bottom: 1rem;
}

.content h4 {
  color: var(--text);
  margin-top: 1rem;
  margin-bottom: 0.5rem;
}

.content p,
.pub-item p,
.education-item p,
.experience-item p,
.teaching-item p,
.skill-category p,
.skill-section p,
.news-item p:last-child {
  text-align: left;
}

.highlight-section {
  background: var(--highlight-bg);
  border-left: 4px solid var(--accent);
}

.research-highlight {
  background: #fafbfc;
  padding: 1.5rem;
  border-radius: 8px;
  border-left: 3px solid var(--accent);
}

.research-highlight h4 {
  margin-top: 0;
  color: var(--accent);
}

.research-highlight ul {
  margin-left: 1.5rem;
  margin-top: 1rem;
}

.publications {
  display: grid;
  gap: 1rem;
}

.pub-row {
  display: grid;
  grid-template-columns: minmax(110px, 110px) minmax(0, 1fr);
  gap: 1rem;
  align-items: center;
  background: #fafbfc;
  padding: 1rem;
  border-radius: 10px;
  border-left: 3px solid var(--accent);
}

.pub-media-placeholder {
  width: 110px;
  aspect-ratio: 1 / 1;
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.35rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  justify-self: start;
  overflow: hidden;
}

.pub-media-placeholder img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  border-radius: 8px;
}

.pub-item h4 {
  margin-top: 0;
  color: var(--text);
  font-size: 1rem;
}

.pub-item p {
  color: var(--text-light);
  font-size: 0.9rem;
  margin: 0.5rem 0 0 0;
}

.placeholder-label {
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.placeholder-text {
  color: var(--text-light);
  margin: 0;
}

.news-section h3 {
  margin-bottom: 1rem;
}

.news-list {
  display: grid;
  gap: 1rem;
}

.news-item {
  display: grid;
  grid-template-columns: 90px minmax(0, 1fr);
  gap: 1rem;
  align-items: start;
  background: #fafbfc;
  padding: 1rem 1.2rem;
  border-radius: 8px;
  border-left: 3px solid var(--accent);
}

.news-date {
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin: 0;
}

.news-item p:last-child {
  color: var(--text);
  margin: 0;
}

.partners-section h3 {
  margin-bottom: 1.25rem;
}

.logo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  align-items: center;
}

.logo-card {
  background: #fafbfc;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem;
  min-height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 1px 4px var(--shadow);
}

.logo-card img {
  max-width: 100%;
  max-height: 72px;
  object-fit: contain;
  display: block;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 1rem;
}

.project-card {
  background: #fafbfc;
  padding: 1.5rem;
  border-radius: 8px;
  border-top: 3px solid var(--accent);
  transition: transform 0.2s, box-shadow 0.2s;
}

.project-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 4px 12px var(--shadow);
}

.project-card h4 {
  margin-top: 0;
  color: var(--accent);
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.skill-category {
  background: #fafbfc;
  padding: 1rem;
  border-radius: 8px;
  border-left: 3px solid var(--accent);
}

.skill-category h4 {
  margin-top: 0;
  color: var(--accent);
  font-size: 1rem;
}

.skill-category p {
  color: var(--text-light);
  margin: 0.5rem 0 0 0;
  font-size: 0.9rem;
}

.achievements-list {
  list-style: none;
  margin-left: 0;
}

.achievements-list li {
  background: #fafbfc;
  padding: 1rem;
  margin-bottom: 0.8rem;
  border-radius: 8px;
  border-left: 3px solid var(--accent);
}

.education-item, .experience-item, .teaching-item {
  background: #fafbfc;
  padding: 1.5rem;
  border-radius: 8px;
  margin-bottom: 1.5rem;
  border-left: 3px solid var(--accent);
}

.education-item h3, .experience-item h3, .teaching-item h3 {
  margin-top: 0;
  color: var(--accent);
  font-size: 1.2rem;
}

.education-item p, .experience-item p, .teaching-item p {
  color: var(--text-light);
  margin-bottom: 0.8rem;
}

.education-item ul, .experience-item ul, .teaching-item ul {
  margin-left: 1.5rem;
  color: var(--text);
}

.education-item ul li, .experience-item ul li, .teaching-item ul li {
  margin-bottom: 0.5rem;
}

.skills-detailed {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.skill-section {
  background: #fafbfc;
  padding: 1rem;
  border-radius: 8px;
  border-left: 3px solid var(--accent);
}

.skill-section h4 {
  margin-top: 0;
  color: var(--accent);
  font-size: 1rem;
  margin-bottom: 0.5rem;
}

.skill-section p {
  color: var(--text-light);
  margin: 0;
  font-size: 0.9rem;
}

footer {
  text-align: center;
  margin-top: 3rem;
  padding: 2rem;
  background: var(--card);
  border-radius: 12px;
  color: var(--text-light);
  box-shadow: 0 2px 8px var(--shadow);
}

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

footer a:hover {
  text-decoration: underline;
}

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

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

code {
  background: #f6f8fa;
  padding: 0.2rem 0.4rem;
  border-radius: 3px;
  font-family: 'Consolas', 'Monaco', monospace;
  font-size: 0.9em;
  color: var(--accent);
}

ul {
  line-height: 1.8;
}

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

/* Responsive Design */
@media (max-width: 768px) {
  header h1 {
    font-size: 2rem;
  }
  
  .hero h2 {
    font-size: 1.5rem;
  }
  
  .hero-content {
    flex-direction: column;
    text-align: center;
  }
  
  .profile-image img {
    width: 150px;
    height: 150px;
  }
  
  .project-grid, .skills-grid, .skills-detailed, .pub-row {
    grid-template-columns: 1fr;
  }

  .pub-media-placeholder {
    width: 100px;
    aspect-ratio: 1 / 1;
  }

  .news-list {
    gap: 0.8rem;
  }

  .logo-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .news-item {
    grid-template-columns: 1fr;
    gap: 0.35rem;
  }
  
  .contact-links {
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  .logo-grid {
    grid-template-columns: 1fr;
  }
}