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

html {
  scroll-behavior: smooth;
}

body {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  background: #f8fafc;
  color: #0f172a;
}

img {
  width: 100%;
  display: block;
}

a {
  text-decoration: none;
}

ul {
  list-style: none;
}

.container {
  width: 90%;
  max-width: 1200px;
  margin: auto;
}

.section {
  padding: 90px 0;
}

.section-title {
  text-align: center;
  margin-bottom: 50px;
}

.section-title h2 {
  font-size: 2.3rem;
  color: #0f172a;
  margin-bottom: 10px;
}

.section-title p {
  color: #64748b;
  font-size: 1rem;
}

.header {
  width: 100%;
  background: #ffffff;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.navbar {
  height: 75px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-size: 1.7rem;
  font-weight: 700;
  color: #0f172a;
}

.logo span {
  color: #2563eb;
}

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

.nav-links li a {
  color: #0f172a;
  font-weight: 600;
  transition: 0.3s;
}

.nav-links li a:hover {
  color: #2563eb;
}

.menu-btn {
  display: none;
  font-size: 1.6rem;
  cursor: pointer;
  color: #0f172a;
}

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, #0f172a, #1d4ed8);
  color: #fff;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 50px;
}

.hero-subtitle {
  font-size: 1.1rem;
  margin-bottom: 10px;
  color: #cbd5e1;
}

.hero-text h1 {
  font-size: 3.3rem;
  margin-bottom: 10px;
}

.hero-text h2 {
  font-size: 1.7rem;
  font-weight: 600;
  margin-bottom: 20px;
  color: #bfdbfe;
}

.hero-text p {
  font-size: 1rem;
  max-width: 550px;
  margin-bottom: 28px;
  color: #e2e8f0;
}

.hero-buttons {
  display: flex;
  gap: 15px;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 13px 24px;
  border-radius: 10px;
  font-weight: 600;
  transition: 0.3s ease;
}

.primary-btn {
  background: #ffffff;
  color: #1d4ed8;
}

.primary-btn:hover {
  background: #dbeafe;
}

.secondary-btn {
  border: 2px solid #ffffff;
  color: #ffffff;
}

.secondary-btn:hover {
  background: #ffffff;
  color: #1d4ed8;
}

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

.image-box {
  width: 360px;
  border-radius: 25px;
  overflow: hidden;
  box-shadow: 0 12px 35px rgba(0, 0, 0, 0.25);
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0% { transform: translateY(0px); }
  50% { transform: translateY(-12px); }
  100% { transform: translateY(0px); }
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 25px;
}

.about-card {
  background: #ffffff;
  padding: 30px;
  border-radius: 18px;
  box-shadow: 0 8px 25px rgba(15, 23, 42, 0.06);
}

.about-card h3 {
  margin-bottom: 15px;
  color: #1d4ed8;
}

.about-card p {
  color: #475569;
  margin-bottom: 12px;
}

.skills-section {
  background: #eff6ff;
}

.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 25px;
}

.skill-card {
  background: #ffffff;
  padding: 30px 20px;
  text-align: center;
  border-radius: 18px;
  box-shadow: 0 8px 25px rgba(15, 23, 42, 0.06);
  transition: 0.3s;
}

.skill-card:hover {
  transform: translateY(-8px);
}

.skill-card i {
  font-size: 2.4rem;
  color: #2563eb;
  margin-bottom: 15px;
}

.skill-card h3 {
  margin-bottom: 10px;
}

.skill-card p {
  color: #64748b;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 25px;
}

.project-card {
  background: #ffffff;
  border-radius: 18px;
  overflow: hidden;
  box-shadow: 0 8px 25px rgba(15, 23, 42, 0.06);
  transition: 0.3s;
}

.project-card:hover {
  transform: translateY(-8px);
}

.project-info {
  padding: 22px;
}

.project-info h3 {
  margin-bottom: 12px;
}

.project-info p {
  color: #64748b;
  margin-bottom: 18px;
}

.project-btn {
  display: inline-block;
  color: #2563eb;
  font-weight: 700;
}

.education-section {
  background: #f1f5f9;
}

.education-timeline {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 25px;
}

.education-card {
  background: #ffffff;
  padding: 28px;
  border-left: 5px solid #2563eb;
  border-radius: 16px;
  box-shadow: 0 8px 25px rgba(15, 23, 42, 0.06);
}

.edu-year {
  display: inline-block;
  margin-bottom: 10px;
  background: #dbeafe;
  color: #1d4ed8;
  padding: 6px 14px;
  border-radius: 30px;
  font-size: 0.9rem;
  font-weight: 700;
}

.education-card h3 {
  margin-bottom: 10px;
}

.education-card p {
  color: #64748b;
}

.contact-section {
  background: #ffffff;
}

.contact-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 35px;
}

.contact-info,
.contact-form {
  background: #f8fafc;
  padding: 30px;
  border-radius: 18px;
  box-shadow: 0 8px 25px rgba(15, 23, 42, 0.05);
}

.contact-info h3 {
  margin-bottom: 15px;
  color: #1d4ed8;
}

.contact-info p {
  color: #475569;
  margin-bottom: 12px;
}

.contact-details p i {
  color: #2563eb;
  margin-right: 10px;
}

.social-links {
  margin-top: 20px;
  display: flex;
  gap: 12px;
}

.social-links a {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: #2563eb;
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: 0.3s;
}

.social-links a:hover {
  transform: translateY(-5px);
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 14px 15px;
  margin-bottom: 15px;
  border: 1px solid #cbd5e1;
  border-radius: 10px;
  font-size: 1rem;
  outline: none;
}

.contact-form input:focus,
.contact-form textarea:focus {
  border-color: #2563eb;
}

.footer {
  background: #0f172a;
  color: #ffffff;
  text-align: center;
  padding: 20px 0;
}

@media (max-width: 992px) {
  .hero-content,
  .about-content,
  .skills-grid,
  .projects-grid,
  .education-timeline,
  .contact-container {
    grid-template-columns: 1fr 1fr;
  }

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

  .hero-text h1 {
    font-size: 2.6rem;
  }
}

@media (max-width: 768px) {
  .menu-btn {
    display: block;
  }

  .nav-links {
    position: absolute;
    top: 75px;
    right: 0;
    width: 100%;
    background: #ffffff;
    flex-direction: column;
    align-items: center;
    gap: 18px;
    padding: 25px 0;
    display: none;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.08);
  }

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

  .hero-content,
  .about-content,
  .skills-grid,
  .projects-grid,
  .education-timeline,
  .contact-container {
    grid-template-columns: 1fr;
  }

  .hero {
    text-align: center;
    padding: 120px 0 70px;
  }

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

  .hero-text h1 {
    font-size: 2.2rem;
  }

  .hero-text h2 {
    font-size: 1.3rem;
  }

  .image-box {
    width: 280px;
    margin: auto;
  }

  .section {
    padding: 70px 0;
  }
}

@media (max-width: 480px) {
  .section-title h2 {
    font-size: 1.8rem;
  }

  .hero-text h1 {
    font-size: 1.9rem;
  }

  .btn {
    width: 100%;
    text-align: center;
  }
}