/* Modern, Premium Static Website Design System */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Outfit:wght@400;500;600;700;800&display=swap');

:root {
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --accent: #2563eb;
  --accent-gradient: linear-gradient(135deg, #2563eb 0%, #4f46e5 100%);
  --border-color: rgba(15, 23, 42, 0.08);
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-title: 'Outfit', var(--font-sans);
  --max-width: 1000px;
}

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

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

/* Header & Navigation */
header {
  border-bottom: 1px solid var(--border-color);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  background-color: rgba(248, 250, 252, 0.85);
  z-index: 100;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 4.5rem;
}

.logo {
  font-family: var(--font-title);
  font-size: 1.25rem;
  font-weight: 700;
  text-decoration: none;
  color: var(--text-primary);
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

nav ul {
  display: flex;
  list-style: none;
  gap: 2rem;
}

nav a {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s ease;
}

nav a:hover, nav a.active {
  color: var(--text-primary);
}

/* Hero Section */
.hero {
  padding: 3rem 0 2rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3rem;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
}

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-img {
  max-width: 100%;
  height: auto;
  border-radius: 0px;
  border: 1px solid var(--border-color);
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.06);
}

.hero-subtitle {
  font-size: 1rem;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 1rem;
}

.hero h1 {
  font-family: var(--font-title);
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 1.5rem;
}

.gradient-text {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 700px;
  margin-bottom: 1.5rem;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  margin-top: 3rem;
}

.stat-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 1.5rem;
  border-radius: 0px;
  text-align: left;
}

.stat-card h3 {
  font-family: var(--font-title);
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.stat-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Brand/Social Proof Strip */
.brand-strip {
  margin-top: 3.5rem;
  padding: 1.5rem 0;
  border-top: 1px dashed var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.brand-strip-title {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.12em;
}

.brand-logos {
  display: flex;
  flex-wrap: wrap;
  gap: 3.5rem;
  align-items: center;
}

.brand-logo {
  font-family: var(--font-title);
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  opacity: 0.65;
  transition: opacity 0.2s ease, color 0.2s ease;
  user-select: none;
}

.brand-logo:hover {
  opacity: 1;
  color: var(--text-primary);
}

/* Section Common Styling */
section {
  padding: 3rem 0;
  border-top: 1px solid var(--border-color);
}

.section-title {
  font-family: var(--font-title);
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 2rem;
}

/* Experience Timeline */
.timeline {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.timeline-item {
  display: grid;
  grid-template-columns: 250px 1fr;
  gap: 2rem;
}

.timeline-meta {
  color: var(--text-secondary);
}

.timeline-date {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

.timeline-content h3 {
  font-family: var(--font-title);
  font-size: 1.25rem;
  font-weight: 600;
}

.timeline-company {
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 0.75rem;
}

.timeline-content ul {
  list-style: none;
  margin-top: 0.5rem;
}

.timeline-content li {
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
  position: relative;
  padding-left: 1.25rem;
}

.timeline-content li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--accent);
}

/* Skills list */
.skills-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.skill-tag {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 0.5rem 1rem;
  border-radius: 0px;
  font-size: 0.85rem;
  color: var(--text-primary);
}

/* Articles grid */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
}

.article-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 0px;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.article-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
}

.article-date {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.article-card h3 {
  font-family: var(--font-title);
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  line-height: 1.3;
}

.article-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  flex-grow: 1;
}

/* Article Detail Content styling */
.article-header {
  padding: 5rem 0 3rem;
  text-align: center;
}

.article-header h1 {
  font-family: var(--font-title);
  font-size: 3rem;
  line-height: 1.2;
  margin-bottom: 1rem;
}

.article-content {
  max-width: 720px;
  margin: 0 auto;
  padding-bottom: 5rem;
}

.article-content p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.7;
}

.article-content h2, .article-content h3 {
  font-family: var(--font-title);
  color: var(--text-primary);
  margin: 2rem 0 1rem;
}

.article-content code {
  font-family: monospace;
  background: var(--bg-secondary);
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  font-size: 0.9em;
}

.article-content pre {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 1.5rem;
  border-radius: 8px;
  overflow-x: auto;
  margin-bottom: 1.5rem;
}

.article-content pre code {
  padding: 0;
  background: none;
  font-size: 0.95rem;
}

/* Contact section */
.contact-section {
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.btn {
  display: inline-block;
  background: var(--accent-gradient);
  color: #ffffff;
  text-decoration: none;
  font-weight: 600;
  padding: 0.8rem 2rem;
  border-radius: 0px;
  margin-top: 1.5rem;
  transition: opacity 0.2s ease;
}

.btn:hover {
  opacity: 0.9;
}

.contact-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-top: 2rem;
}

.contact-links a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s ease;
}

.contact-links a:hover {
  color: var(--text-primary);
}

/* Hero CTAs */
.hero-ctas {
  display: flex;
  gap: 1rem;
  align-items: center;
  margin-top: 1.5rem;
}

.btn-outline {
  background: transparent !important;
  color: var(--text-primary) !important;
  border: 1px solid var(--text-primary) !important;
}

.btn-outline:hover {
  background: var(--text-primary) !important;
  color: var(--bg-primary) !important;
}

.btn-text {
  background: transparent !important;
  color: var(--accent) !important;
  text-decoration: underline;
  padding: 0.8rem 1rem !important;
}

/* About Section */
.lead-text {
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 1rem;
  line-height: 1.5;
}

/* What I Do Section */
.what-i-do-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
}

.what-i-do-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 1.5rem;
}

.what-i-do-card h4 {
  font-family: var(--font-title);
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.what-i-do-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Projects Section */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.project-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  padding: 2rem;
}

.project-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.75rem;
}

.project-header h3 {
  font-family: var(--font-title);
  font-size: 1.25rem;
  font-weight: 700;
}

.project-tag {
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--bg-tertiary);
  padding: 0.25rem 0.75rem;
  color: var(--accent);
}

.project-summary {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.project-achievements {
  list-style: none;
}

.project-achievements li {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
  position: relative;
  padding-left: 1.25rem;
}

.project-achievements li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: bold;
}

/* Footer */
footer {
  border-top: 1px solid var(--border-color);
  padding: 3rem 0;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Responsiveness */
@media (max-width: 768px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
    text-align: center;
  }
  .hero-content {
    align-items: center;
  }
  .hero-ctas {
    flex-wrap: wrap;
    justify-content: center;
  }
  .hero h1 {
    font-size: 2.5rem;
  }
  .timeline-item {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }
  .article-header h1 {
    font-size: 2.25rem;
  }
}