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

:root {
  --text: #1a1a1a;
  --text-secondary: #555;
  --text-muted: #888;
  --bg: #fafafa;
  --bg-alt: #f0f0f0;
  --border: #e0e0e0;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --radius: 8px;
  --max-width: 960px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

.section {
  padding: 80px 0;
}

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

/* === Header === */
header {
  position: sticky;
  top: 0;
  background: rgba(250, 250, 250, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 100;
}

nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-name {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text);
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 28px;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}

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

/* === Hero === */
.hero {
  padding: 100px 24px 80px;
  max-width: var(--max-width);
  margin: 0 auto;
}

.hero-grid {
  display: flex;
  align-items: center;
  gap: 48px;
}

.hero-content {
  flex: 1;
}

.hero-photo img {
  width: 220px;
  height: auto;
  border-radius: 12px;
  object-fit: cover;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
}

.hero-label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.hero h1 {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 20px;
}

.hero-sub {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 600px;
  line-height: 1.7;
  margin-bottom: 32px;
}

.hero-sub a,
.about-text a,
.result-card a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
}

.hero-sub a:hover,
.about-text a:hover,
.result-card a:hover {
  text-decoration: underline;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* === Buttons === */
.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--accent-hover);
}

.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  border-color: var(--text-secondary);
}

/* === Section Headings === */
h2 {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 40px;
}

/* === About === */
.about-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 48px;
  align-items: start;
}

.about-text p {
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.8;
}

.about-details {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.detail {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.detail-label {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.detail-value {
  font-weight: 500;
}

/* === Timeline === */
.timeline {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 32px;
}

.timeline-date {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  padding-top: 4px;
}

.timeline-content h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.timeline-company {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

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

.timeline-company a:hover {
  text-decoration: underline;
}

.timeline-content ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.timeline-content li {
  position: relative;
  padding-left: 16px;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.timeline-content li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--border);
}

/* === Results === */
.results-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.result-card {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
}

.result-metric {
  display: block;
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 4px;
}

.result-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 12px;
}

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

/* === Skills === */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 32px;
}

.skill-group h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.skill-tags span {
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.section-alt .skill-tags span {
  background: #fff;
}

/* === Education === */
.education-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.education-item {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.education-item h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 4px;
}

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

/* === Contact === */
.contact-intro {
  color: var(--text-secondary);
  margin-bottom: 32px;
  max-width: 500px;
}

.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 24px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--text);
  font-size: 0.95rem;
  font-weight: 500;
  transition: border-color 0.2s;
}

.contact-item:hover {
  border-color: var(--accent);
}

.contact-icon {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--accent);
  width: 24px;
  text-align: center;
}

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

footer p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* === Responsive === */
@media (max-width: 768px) {
  .section {
    padding: 60px 0;
  }

  .hero {
    padding: 60px 24px 40px;
  }

  .nav-links {
    display: none;
  }

  .hero-grid {
    flex-direction: column-reverse;
    gap: 32px;
    text-align: center;
  }

  .hero-photo img {
    width: 180px;
  }

  .hero-actions {
    justify-content: center;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .about-details {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 24px;
  }

  .timeline-item {
    grid-template-columns: 1fr;
    gap: 8px;
  }

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

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

  .contact-links {
    flex-direction: column;
  }
}