:root {
  --bg: #ffffff;
  --text: #1a1a1a;
  --muted: #6b7280;
  --accent: #111827;
  --brand: #111827;
  --border: #f0f0f0;
  --maxw: 1200px;
  --space: 24px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--text); font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Inter, "Helvetica Neue", Arial, "Apple Color Emoji", "Segoe UI Emoji"; line-height: 1.5; }
a { color: inherit; text-decoration: none; }
a:hover { text-decoration: underline; }

.container { max-width: var(--maxw); margin: 0 auto; padding: calc(var(--space)*2) var(--space); }

.site-header { border-bottom: 1px solid var(--border); backdrop-filter: blur(6px); background: rgba(255,255,255,0.8); }
.site-header .container { display: flex; align-items: center; justify-content: space-between; }
.brand { font-weight: 700; letter-spacing: -0.01em; }
.nav-links { display: flex; gap: 24px; }
.nav-links a { color: var(--muted); font-weight: 500; transition: color .2s ease; }
.nav-links a:hover { color: var(--text); text-decoration: none; }

.hero {
  margin-top: 48px;
  display: flex;
  align-items: center;
  gap: 64px;
  min-height: 400px;
}

.hero-copy {
  flex: 1;
}

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

.hero-image img {
  width: 500px;
  height: auto;
  max-width: 100%;
}
.hero .role { color: var(--muted); margin-bottom: 8px; }

.role-with-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.role-logo {
  width: 36px;
  height: 36px;
  object-fit: contain;
}
.hero-grid { display: grid; grid-template-columns: 1fr auto; gap: 64px; align-items: flex-start; }
.tagline { font-size: clamp(40px, 8vw, 72px); line-height: 1.1; letter-spacing: -0.03em; margin: 0 0 24px 0; display: grid; font-weight: 800; }
.tagline span { display: block; }
.bio { color: var(--muted); max-width: 65ch; font-size: 1.125rem; line-height: 1.7; }
.hero-avatar img { 
  width: 280px; 
  height: 350px; 
  border-radius: 24px; 
  object-fit: cover; 
  border: none;
  box-shadow: 0 20px 40px rgba(0,0,0,0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.hero-avatar img:hover {
  transform: translateY(-8px);
  box-shadow: 0 28px 56px rgba(0,0,0,0.15);
}

.hero-avatar {
  position: relative;
}

.hero-avatar::before {
  content: '';
  position: absolute;
  top: -8px;
  left: -8px;
  right: -8px;
  bottom: -8px;
  background: linear-gradient(135deg, #f0f9ff, #e0f2fe);
  border-radius: 32px;
  z-index: -1;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.hero-avatar:hover::before {
  opacity: 1;
}

.projects h2, .articles h2, .contact h2, .about h2, .media h2, .ai h2 { font-size: 28px; margin: 48px 0 24px; color: var(--accent); font-weight: 700; letter-spacing: -0.02em; }

.media a {
  color: #2563eb;
  text-decoration: underline;
  font-weight: 500;
  transition: color 0.2s ease;
}

.media a:hover {
  color: #1d4ed8;
  text-decoration: underline;
}
.card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(400px, 1fr)); gap: 24px; }
.card { border: 1px solid var(--border); border-radius: 20px; overflow: hidden; transition: transform .2s ease, box-shadow .2s ease; background: #fff; display: flex; flex-direction: column; }
.card:hover { transform: translateY(-3px); box-shadow: 0 12px 32px rgba(0,0,0,0.12); text-decoration: none; }
.card-image { position: relative; width: 100%; aspect-ratio: 16 / 9; background: #f3f4f6; }
.card-image img { width: 100%; height: 100%; object-fit: cover; display: block; }
.card-image--placeholder { width: 100%; height: 100%; background: linear-gradient(135deg, #eef2ff, #e5e7eb); }

.card-video {
  width: calc(100vw + 100px);
  margin-left: calc(-50vw + 50% - 50px);
  margin-right: calc(-50vw + 50% - 50px);
  margin-bottom: 0;
  overflow: hidden;
  position: relative;
  z-index: 1;
}

.card-video iframe {
  width: 100%;
  height: 320px;
  border: none;
  border-radius: 0;
  display: block;
  margin: 0;
  padding: 0;
}
.card-body { padding: 24px; }
.card-meta { font-size: 14px; color: var(--muted); text-transform: none; letter-spacing: 0; background: #f9fafb; padding: 8px 16px; border-radius: 12px; display: inline-block; margin-bottom: 16px; border: 1px solid var(--border); }
.card-title { font-size: 24px; margin: 12px 0; font-weight: 700; letter-spacing: -0.01em; }
.card-tagline { font-style: italic; color: var(--muted); margin: 8px 0 16px; font-size: 16px; line-height: 1.4; }
.card-desc { color: var(--muted); margin: 0 0 16px; line-height: 1.6; font-size: 16px; }
.card-footer { display: flex; align-items: center; justify-content: flex-end; gap: 8px; padding: 12px 16px; border-top: 1px solid var(--border); }
.btn { display: inline-flex; align-items: center; padding: 12px 20px; border: none; border-radius: 12px; background: var(--text); color: white; font-weight: 600; font-size: 14px; transition: all .2s ease; }
.btn:hover { background: #374151; text-decoration: none; transform: translateY(-1px); }

.btn-secondary { background: transparent; color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--border); text-decoration: none; transform: translateY(-1px); }

.about-content { 
  display: flex; 
  align-items: center; 
  gap: 64px; 
  margin-top: 24px;
}

.about-text { flex: 1; order: 2; }

.about-avatar { flex-shrink: 0; order: 1; }

.about-avatar img { 
  width: 280px; 
  height: 350px; 
  border-radius: 24px; 
  object-fit: cover; 
  border: none;
  box-shadow: 0 20px 40px rgba(0,0,0,0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.about-avatar img:hover {
  transform: translateY(-8px);
  box-shadow: 0 28px 56px rgba(0,0,0,0.15);
}

.about-avatar-caption {
  text-align: center;
  margin-top: 16px;
}

.about-avatar-caption h3 {
  margin: 0 0 4px 0;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
}

.about-avatar-caption p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--muted);
  font-weight: 500;
}



.about-avatar {
  position: relative;
}

.about-avatar::before {
  content: '';
  position: absolute;
  top: -8px;
  left: -8px;
  right: -8px;
  bottom: -8px;
  background: linear-gradient(135deg, #f0f9ff, #e0f2fe);
  border-radius: 32px;
  z-index: -1;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.about-avatar:hover::before {
  opacity: 1;
}

.about-desc { color: var(--muted); max-width: 65ch; font-size: 1.125rem; line-height: 1.7; margin: 0 0 24px 0; }

.about-desc a {
  color: #6b7280;
  text-decoration: underline;
  transition: color 0.2s ease;
}

.about-desc a:hover {
  color: #374151;
  text-decoration: none;
}

.about-personal {
  color: #9ca3af;
  max-width: 65ch;
  font-size: 1rem;
  line-height: 1.6;
  margin: 0 0 24px 0;
}

.about-personal a {
  color: #6b7280;
  text-decoration: underline;
  transition: color 0.2s ease;
}

.about-personal a:hover {
  color: #374151;
  text-decoration: none;
}

.ai-intro {
  margin: 24px 0 48px 0;
  max-width: 80ch;
}

.ai-intro p {
  color: var(--muted);
  font-size: 1.125rem;
  line-height: 1.7;
  margin: 0 0 20px 0;
}

.ai-intro p:last-child {
  margin-bottom: 0;
}

.ai-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin: 32px 0;
}

.ai-card {
  padding: 24px;
  border-radius: 12px;
  background: linear-gradient(135deg, #f8fafc, #f1f5f9);
  border: 1px solid #e2e8f0;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.ai-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, #3b82f6, #8b5cf6, #06b6d4);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.ai-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.1);
  background: linear-gradient(135deg, #ffffff, #f8fafc);
}

.ai-card:hover::before {
  opacity: 1;
}

.ai-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
  font-size: 1rem;
}

.ai-card strong {
  color: var(--text);
}

.ai-outro {
  margin-top: 48px;
  max-width: 80ch;
}

.ai-outro p {
  color: var(--muted);
  font-size: 1.125rem;
  line-height: 1.7;
  margin: 0;
}

.list { list-style: none; padding: 0; margin: 0; }
.list-item { display: flex; justify-content: space-between; padding: 10px 0; border-bottom: 1px solid var(--border); }
.list-item a { font-weight: 600; }
.list-meta { color: var(--muted); font-size: 12px; }

.site-footer { border-top: 1px solid var(--border); color: var(--muted); }
.cta { font-weight: 700; }

@media (prefers-color-scheme: dark) {
  :root { --bg: #0b0f18; --text: #e5e7eb; --muted: #94a3b8; --accent: #e2e8f0; --border: #1f2937; --brand: #ffffff; }
  .site-header { background: rgba(11,15,24,0.5); }
  .card { background: #0f172a; }
  .ai-card { 
    background: linear-gradient(135deg, #0f172a, #1e293b);
    border: 1px solid #374151;
  }
  .ai-card:hover {
    background: linear-gradient(135deg, #1e293b, #334155);
  }
}

/* Mobile-first responsive design */
@media (max-width: 768px) {
  .container {
    padding: 0 16px;
  }
  
  .hero {
    flex-direction: column;
    gap: 32px;
    text-align: center;
    margin-top: 24px;
    min-height: auto;
  }
  
  .hero-image img {
    width: 100%;
    max-width: 400px;
  }
  
  .about-content {
    flex-direction: column;
    gap: 32px;
    text-align: center;
  }
  
  .about-avatar img {
    width: 240px;
    height: 300px;
  }
  
  .card-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  
  .site-header {
    padding: 16px 0;
  }
  
  .nav-links {
    display: none;
  }
  
  .brand {
    font-size: 1.5rem;
  }
  
  .tagline {
    font-size: 2.5rem;
    line-height: 1.2;
  }
  
  .bio {
    font-size: 1.125rem;
    line-height: 1.6;
  }
  
  .about-desc {
    font-size: 1rem;
    line-height: 1.6;
  }
  
  .about-personal {
    font-size: 0.95rem;
    line-height: 1.5;
  }
  
  .card-title {
    font-size: 1.5rem;
  }
  
  .card-desc {
    font-size: 0.95rem;
    line-height: 1.5;
  }
  
  .ai-grid {
    grid-template-columns: 1fr;
    gap: 20px;
    margin: 24px 0;
  }
  
  .ai-card {
    padding: 20px;
  }
  
  .ai-intro p {
    font-size: 1rem;
    line-height: 1.6;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 12px;
  }
  
  .hero {
    gap: 24px;
    margin-top: 16px;
  }
  
  .tagline {
    font-size: 2rem;
  }
  
  .bio {
    font-size: 1rem;
  }
  
  .about-avatar img {
    width: 200px;
    height: 250px;
  }
  
  .card {
    padding: 20px;
  }
  
  .card-image img {
    height: 200px;
  }
  
  .card-body {
    padding: 16px;
  }
  
  .card-footer {
    padding: 8px 12px;
  }
  
  .btn {
    padding: 10px 16px;
    font-size: 13px;
  }
  
  .ai-grid {
    gap: 16px;
    margin: 20px 0;
  }
  
  .ai-card {
    padding: 16px;
  }
  
  .ai-card p {
    font-size: 0.95rem;
  }
  
  .ai-intro p {
    font-size: 0.95rem;
    line-height: 1.6;
  }
}