:root {
  --color-primary: #4FA8E0;
  --color-dark: #1A1A1A;
  --color-light: #FFFFFF;
  --color-bg: #FAFAFA;
  --color-bg-alt: #EAF4FB;
  --color-muted: #6B6B6B;
  --font-heading: 'Poppins', sans-serif;
}

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

body {
  font-family: sans-serif;
  color: var(--color-dark);
  background-color: var(--color-bg);
}

#hero {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 100px 24px;
}

.hero-content {
  flex: 1;
}

.hero-greeting {
  color: var(--color-primary);
  font-weight: 500;
  margin-bottom: 8px;
}

.hero-name {
  font-family: var(--font-heading);
  font-size: 48px;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 8px;
}

.hero-headline {
  font-size: 24px;
  font-weight: 500;
  color: var(--color-muted);
  margin-bottom: 16px;
}

.hero-tagline {
  color: var(--color-muted);
  margin-bottom: 32px;
  max-width: 480px;
}

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

.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 500;
  transition: transform 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-light);
}

.btn-outline {
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
}

.hero-image {
  flex: 1;
  display: flex;
  justify-content: center;
}

.hero-image img {
  width: 100%;
  max-width: 360px;
  border-radius: 16px;
  object-fit: cover;
}

.section-label {
  color: var(--color-primary);
  font-weight: 500;
  text-align: center;
  margin-bottom: 8px;
}

.section-title {
  font-family: var(--font-heading);
  font-size: 32px;
  font-weight: 600;
  text-align: center;
  margin-bottom: 40px;
}

/* About Me */
#about {
  background-color: var(--color-bg-alt);
}

.about-inner {
  max-width: 700px;
  margin: 0 auto;
  padding: 80px 24px;
  text-align: center;
}


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

/* Skills */
#skills {
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 24px;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
}

.skill-card {
  background-color: var(--color-light);
  border: 1px solid #E5E5E5;
  border-radius: 12px;
  padding: 24px 16px;
  text-align: center;
  font-weight: 500;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.skill-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 20px rgba(79, 168, 224, 0.15);
}

/* Portfolio */
#portfolio {
  background-color: var(--color-bg-alt);
}

.portfolio-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 24px;
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.project-card {
  background-color: var(--color-light);
  border-radius: 16px;
  padding: 28px 24px;
  position: relative;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.project-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.08);
}

.project-number {
  display: block;
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 700;
  color: var(--color-primary);
  opacity: 0.5;
  margin-bottom: 12px;
}

.project-info h3 {
  font-family: var(--font-heading);
  font-size: 18px;
  margin-bottom: 8px;
}

.project-info p {
  color: var(--color-muted);
  font-size: 14px;
  line-height: 1.6;
  margin-bottom: 12px;
}

.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.tech-tags span {
  background-color: var(--color-bg-alt);
  color: var(--color-primary);
  font-size: 12px;
  font-weight: 500;
  padding: 4px 10px;
  border-radius: 20px;
}

.project-link {
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 500;
  font-size: 14px;
}

.project-link:hover {
  text-decoration: underline;
}

/* Contact */
.contact-inner {
  max-width: 700px;
  margin: 0 auto;
  padding: 80px 24px;
  text-align: center;
}

.contact-intro {
  color: var(--color-muted);
  margin-bottom: 40px;
}

.contact-socials {
  display: flex;
  gap: 20px;
  justify-content: center;
}

.social-link {
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 500;
}

.social-link:hover {
  text-decoration: underline;
}

/* Navbar */
#navbar {
  position: sticky;
  top: 0;
  background-color: var(--color-light);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
  z-index: 100;
}

.navbar-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar-logo {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 700;
  color: var(--color-dark);
  text-decoration: none;
}

.navbar-logo span {
  color: var(--color-primary);
}

.navbar-links {
  display: flex;
  gap: 32px;
}

.navbar-links a {
  color: var(--color-dark);
  text-decoration: none;
  font-weight: 500;
  font-size: 15px;
  transition: color 0.2s ease;
}

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

.navbar-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.navbar-toggle span {
  width: 24px;
  height: 2px;
  background-color: var(--color-dark);
}

/* Footer */
footer {
  text-align: center;
  padding: 32px 24px;
  color: var(--color-muted);
  font-size: 14px;
}

.back-to-top {
  display: inline-block;
  margin-top: 8px;
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 500;
}

.back-to-top:hover {
  text-decoration: underline;
}

/* ===== Responsive - Tablet & Mobile ===== */
@media (max-width: 768px) {

  /* Navbar */
  .navbar-links {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background-color: var(--color-light);
    flex-direction: column;
    align-items: center;
    padding: 24px 0;
    gap: 20px;
    box-shadow: 0 8px 10px rgba(0, 0, 0, 0.05);
    display: none;
  }

  .navbar-links.active {
    display: flex;
  }

  .navbar-toggle {
    display: flex;
  }

  /* Hero */
  #hero {
    flex-direction: column-reverse;
    text-align: center;
    padding: 60px 24px;
  }

  .hero-name {
    font-size: 32px;
  }

  .hero-headline {
    font-size: 18px;
  }

  .hero-tagline {
    margin: 0 auto 32px auto;
  }

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

  /* About */

  /* Skills */
  .skills-grid {
  grid-template-columns: repeat(1, 1fr);
  max-width: 280px;
  margin: 0 auto;
  }

  /* Portfolio */
  .portfolio-grid {
    grid-template-columns: 1fr;
  }

  /* Contact */
  .contact-socials {
    flex-direction: column;
    align-items: center;
    gap: 16px;
  }
}