:root {
  --bg: #fafafa;
  --bg-alt: #f5f5f5;
  --fg: #1a1a1a;
  --fg-muted: #6b7280;
  --accent: #374151;
  --border: #e5e5e5;
  --card-bg: #ffffff;
  --card-shadow: 0 1px 3px rgba(0,0,0,0.08), 0 4px 12px rgba(0,0,0,0.04);
  --font: 'Inter', system-ui, -apple-system, sans-serif;
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--fg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: '';
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, #6366f1, #8b5cf6, #ec4899, #f43f5e, #6366f1);
  background-size: 200% 100%;
  animation: gradientMove 8s linear infinite;
  z-index: 100;
}

@keyframes gradientMove {
  0% { background-position: 0% 0%; }
  100% { background-position: 200% 0%; }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

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

.container { max-width: 900px; margin: 0 auto; padding: 48px 24px; }

/* Landing page */
.landing {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  animation: fadeIn 0.8s ease-out;
}

.landing .brand {
  margin-bottom: 48px;
  display: block;
}

.landing .brand svg {
  display: block;
  width: 320px;
  height: 160px;
  border-radius: 12px;
  box-shadow: var(--card-shadow);
  transition: transform 0.3s ease;
}

.landing .brand:hover svg {
  transform: scale(1.02);
}

.landing-buttons {
  display: flex;
  gap: 24px;
}

.landing-btn {
  padding: 16px 48px;
  font-size: 16px;
  font-weight: 500;
  border: 2px solid var(--fg);
  border-radius: 8px;
  background: transparent;
  color: var(--fg);
  cursor: pointer;
  transition: all 0.3s ease;
  text-decoration: none;
}

.landing-btn:hover {
  background: var(--fg);
  color: var(--bg);
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

/* Brand on inner pages */
.preamble .brand,
.container > .brand {
  display: block;
  margin-bottom: 32px;
}

.preamble .brand svg,
.container > .brand svg {
  border-radius: 12px;
  box-shadow: var(--card-shadow);
  transition: transform 0.3s ease;
}

.preamble .brand:hover svg,
.container > .brand:hover svg {
  transform: scale(1.02);
}

/* Preamble page */
.preamble h1 {
  font-size: 32px;
  font-weight: 600;
  margin-bottom: 32px;
  animation: fadeInUp 0.7s ease-out;
}

.preamble p {
  font-size: 16px;
  line-height: 1.8;
  margin-bottom: 24px;
  max-width: 700px;
  animation: fadeInUp 0.7s ease-out both;
}

.preamble p:nth-child(2) { animation-delay: 0.1s; }
.preamble p:nth-child(3) { animation-delay: 0.15s; }
.preamble p:nth-child(4) { animation-delay: 0.2s; }
.preamble p:nth-child(5) { animation-delay: 0.25s; }
.preamble p:nth-child(6) { animation-delay: 0.3s; }
.preamble p:nth-child(7) { animation-delay: 0.35s; }
.preamble p:nth-child(8) { animation-delay: 0.4s; }

/* Floating button */
.floating {
  position: fixed;
  bottom: 32px;
  right: 32px;
  padding: 14px 28px;
  font-size: 14px;
  font-weight: 500;
  background: var(--fg);
  color: var(--bg);
  border-radius: 30px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.2);
  transition: all 0.3s ease;
  z-index: 50;
}

.floating:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 24px rgba(0,0,0,0.25);
  text-decoration: none;
}

/* Projects page */
.section-title {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-muted);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.section-title::before {
  content: '';
  width: 20px;
  height: 2px;
  background: linear-gradient(90deg, #6366f1, #8b5cf6);
  border-radius: 1px;
}

.section-text {
  font-size: 16px;
  color: var(--fg);
  max-width: 640px;
  line-height: 1.8;
  margin-bottom: 32px;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-bottom: 48px;
}

.project-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  animation: fadeInUp 0.6s ease-out both;
}

.project-card:hover {
  box-shadow: var(--card-shadow);
  transform: translateY(-4px);
  border-color: #d1d5db;
}

.project-name {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}

.project-desc {
  font-size: 14px;
  color: var(--fg-muted);
  line-height: 1.6;
  margin-bottom: 16px;
}

.project-link {
  font-size: 13px;
  font-weight: 500;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: all 0.2s ease;
}

.project-link:hover {
  text-decoration: none;
  color: #6366f1;
}

.project-link:hover svg {
  transform: translateX(3px);
}

.project-link svg {
  width: 14px;
  height: 14px;
  transition: transform 0.2s ease;
}

.featured-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 32px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  animation: fadeInUp 0.6s ease-out both;
}

.featured-card:hover {
  box-shadow: var(--card-shadow);
  transform: translateY(-4px);
  border-color: #d1d5db;
}

.featured-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg-muted);
  margin-bottom: 12px;
  transition: color 0.2s ease;
}

.featured-card:hover .featured-label {
  color: #6366f1;
}

.featured-name {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
}

.featured-desc {
  font-size: 15px;
  color: var(--fg-muted);
  line-height: 1.7;
  margin-bottom: 20px;
}

/* Animation delays for grid items */
.projects-grid .project-card:nth-child(1),
.projects-grid .featured-card:nth-child(1) { animation-delay: 0.1s; }
.projects-grid .project-card:nth-child(2),
.projects-grid .featured-card:nth-child(2) { animation-delay: 0.15s; }
.projects-grid .project-card:nth-child(3),
.projects-grid .featured-card:nth-child(3) { animation-delay: 0.2s; }
.projects-grid .project-card:nth-child(4),
.projects-grid .featured-card:nth-child(4) { animation-delay: 0.25s; }
.projects-grid .project-card:nth-child(5),
.projects-grid .featured-card:nth-child(5) { animation-delay: 0.3s; }
.projects-grid .project-card:nth-child(6),
.projects-grid .featured-card:nth-child(6) { animation-delay: 0.35s; }

section {
  padding-bottom: 48px;
  margin-bottom: 48px;
  border-bottom: 1px solid var(--border);
}

section:last-of-type {
  border-bottom: none;
  margin-bottom: 80px;
}

/* Contact */
.contact-label {
  font-size: 14px;
  color: var(--fg-muted);
}

.contact-email {
  font-size: 18px;
  font-weight: 500;
  transition: color 0.2s ease;
}

.contact-email:hover {
  color: #6366f1;
  text-decoration: none;
}

.contact-separator {
  color: var(--fg-muted);
  margin: 0 8px;
}

.contact-note {
  font-size: 14px;
  color: var(--fg-muted);
  margin-top: 8px;
}

/* Responsive */
@media (max-width: 640px) {
  .landing-buttons {
    flex-direction: column;
    gap: 16px;
  }
  
  .landing-btn {
    padding: 14px 40px;
  }
  
  .projects-grid {
    grid-template-columns: 1fr;
  }
  
  .floating {
    bottom: 20px;
    right: 20px;
    padding: 12px 24px;
  }
  
  .preamble h1 {
    font-size: 26px;
  }
}