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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: #212529;
  background-color: #ffffff;
}

/* ============================
   Typography
   ============================ */
h1, h2, h3 {
  font-weight: 600;
  line-height: 1.25;
  color: #212529;
}

p {
  color: #495057;
}

a {
  color: #1a3a5c;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* ============================
   Layout Utilities
   ============================ */
.container {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 80px 0;
}

.section-alt {
  background-color: #f8f9fa;
}

.section-title {
  font-size: 1.875rem;
  font-weight: 700;
  margin-bottom: 48px;
  color: #1a3a5c;
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  display: block;
  width: 48px;
  height: 3px;
  background-color: #1a8a7a;
  margin-top: 10px;
  border-radius: 2px;
}

/* ============================
   Navigation
   ============================ */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: #ffffff;
  border-bottom: 1px solid #e9ecef;
}

.nav-inner {
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-weight: 700;
  font-size: 1.1rem;
  color: #1a3a5c;
  letter-spacing: -0.02em;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 32px;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: #495057;
  transition: color 0.2s;
}

.nav-links a:hover {
  color: #1a3a5c;
  text-decoration: none;
}

/* ============================
   Hero
   ============================ */
.hero {
  background: linear-gradient(135deg, #1a3a5c 0%, #1d4e7a 100%);
  padding: 80px 24px;
}

.hero-inner {
  max-width: 1040px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 56px;
}

.hero-photo {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center top;
  border: 4px solid rgba(255, 255, 255, 0.25);
  flex-shrink: 0;
}

.hero-name {
  font-size: 2.75rem;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.hero-tagline {
  font-size: 1.125rem;
  color: rgba(255, 255, 255, 0.8);
  font-weight: 400;
  margin-bottom: 32px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* ============================
   Buttons
   ============================ */
.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-primary {
  background-color: #1a8a7a;
  color: #ffffff;
}

.btn-primary:hover {
  background-color: #157a6b;
  text-decoration: none;
  transform: translateY(-1px);
}

.btn-outline {
  border: 2px solid rgba(255, 255, 255, 0.6);
  color: #ffffff;
}

.btn-outline:hover {
  border-color: #ffffff;
  background-color: rgba(255, 255, 255, 0.1);
  text-decoration: none;
}

/* ============================
   About Section
   ============================ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 48px;
  align-items: start;
}

.about-text p {
  margin-bottom: 18px;
  font-size: 1.0rem;
}

.about-text p:last-child {
  margin-bottom: 0;
}

.about-card {
  background-color: #f8f9fa;
  border-radius: 10px;
  padding: 28px;
  border-left: 4px solid #1a3a5c;
}

.about-details {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.about-details li {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.detail-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #1a8a7a;
}

.detail-value {
  font-size: 0.95rem;
  color: #212529;
  font-weight: 500;
}

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

.skill-card {
  background-color: #ffffff;
  border-radius: 10px;
  padding: 28px 24px;
  border: 1px solid #e9ecef;
  transition: box-shadow 0.2s, transform 0.2s;
}

.skill-card:hover {
  box-shadow: 0 8px 24px rgba(26, 58, 92, 0.1);
  transform: translateY(-2px);
}

.skill-icon {
  font-size: 2rem;
  margin-bottom: 14px;
  line-height: 1;
}

.skill-card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 10px;
  color: #1a3a5c;
}

.skill-card p {
  font-size: 0.9rem;
  color: #6c757d;
  line-height: 1.6;
}

/* ============================
   Projects Section
   ============================ */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.project-card {
  border: 1px solid #e9ecef;
  border-radius: 10px;
  padding: 32px 28px;
  transition: box-shadow 0.2s, transform 0.2s;
}

.project-card:hover {
  box-shadow: 0 8px 32px rgba(26, 58, 92, 0.12);
  transform: translateY(-2px);
}

.project-header {
  margin-bottom: 14px;
}

.project-tag {
  display: inline-block;
  background-color: #e8f4f2;
  color: #1a8a7a;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 100px;
}

.project-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: #1a3a5c;
  margin-bottom: 14px;
}

.project-desc {
  font-size: 0.95rem;
  color: #495057;
  margin-bottom: 20px;
  line-height: 1.65;
}

.project-highlights {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  border-top: 1px solid #e9ecef;
  padding-top: 20px;
}

.project-highlights li {
  font-size: 0.875rem;
  color: #6c757d;
  padding-left: 16px;
  position: relative;
}

.project-highlights li::before {
  content: '›';
  position: absolute;
  left: 0;
  color: #1a8a7a;
  font-weight: 700;
}

.project-highlights strong {
  color: #212529;
}

/* ============================
   Contact Section
   ============================ */
.contact-container {
  text-align: center;
}

.contact-intro {
  max-width: 520px;
  margin: 0 auto 40px;
  font-size: 1.05rem;
  color: #495057;
}

.contact-links {
  display: flex;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 10px;
  background-color: #ffffff;
  border: 1px solid #dee2e6;
  border-radius: 8px;
  padding: 16px 28px;
  font-weight: 600;
  font-size: 0.95rem;
  color: #1a3a5c;
  transition: all 0.2s;
}

.contact-item:hover {
  border-color: #1a3a5c;
  background-color: #1a3a5c;
  color: #ffffff;
  text-decoration: none;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(26, 58, 92, 0.2);
}

.contact-icon {
  font-size: 1.25rem;
}

/* ============================
   Footer
   ============================ */
.footer {
  background-color: #1a3a5c;
  color: rgba(255, 255, 255, 0.65);
  text-align: center;
  padding: 28px 24px;
  font-size: 0.875rem;
}

/* ============================
   Responsive Design
   ============================ */
@media (max-width: 768px) {
  .hero-inner {
    flex-direction: column;
    text-align: center;
    gap: 32px;
  }

  .hero-name {
    font-size: 2rem;
  }

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

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

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

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

  .nav-links {
    gap: 20px;
  }
}

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

  .section {
    padding: 56px 0;
  }

  .hero {
    padding: 56px 24px;
  }
}