/* Responsive Styles */

/* Large Desktops (1200px and up) */
@media (min-width: 1200px) {
  :root {
    --font-size-4xl: 3.5rem;  /* 56px */
  }
}

/* Laptops and Desktops (992px and up) */
@media (max-width: 1199px) {
  :root {
    --font-size-4xl: 2.75rem;  /* 44px */
    --font-size-3xl: 2.25rem;  /* 36px */
    --container-width: 960px;
  }
  
  .skills-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
  
  .skills-text {
    max-width: 600px;
    margin: 0 auto var(--spacing-lg);
  }
}

/* Tablets (768px and up) */
@media (max-width: 991px) {
  :root {
    --font-size-4xl: 2.5rem;   /* 40px */
    --font-size-3xl: 2rem;     /* 32px */
    --font-size-2xl: 1.75rem;  /* 28px */
    --container-width: 720px;
    --section-padding: 4rem 0;
  }
  
  .hero-content,
  .about-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }
  
  .hero-text {
    order: 1;
    text-align: center;
  }
  
  .hero-text p {
    margin-left: auto;
    margin-right: auto;
  }
  
  .hero-buttons {
    justify-content: center;
  }
  
  .social-icons {
    justify-content: center;
  }
  
  .hero-image {
    order: 0;
    max-width: 400px;
    margin: 0 auto;
  }
  
  .about-image {
    max-width: 400px;
    margin: 0 auto;
  }
  
  .skills-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
  
  .contact-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }
  
  .contact-info {
    max-width: 500px;
    margin: 0 auto;
  }
  
  .timeline::after {
    left: 40px;
  }
  
  .timeline-item {
    width: 100%;
    padding-left: 80px;
    padding-right: 0;
  }
  
  .timeline-item:nth-child(even) {
    left: 0;
  }
  
  .timeline-item::after {
    left: 28px;
  }

  .achievements-grid {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  }
  
  .certifications-grid {
    grid-template-columns: 1fr;
  }
  
  .certification-card {
    max-width: 500px;
    margin: 0 auto;
  }
}

/* Mobile Devices (576px and up) */
@media (max-width: 767px) {
  :root {
    --font-size-4xl: 2.25rem;  /* 36px */
    --font-size-3xl: 1.75rem;  /* 28px */
    --font-size-2xl: 1.5rem;   /* 24px */
    --font-size-xl: 1.25rem;   /* 20px */
    --container-width: 540px;
    --section-padding: 3rem 0;
  }
  
  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    height: 100vh;
    background-color: var(--bg-light);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-lg);
    z-index: var(--z-fixed);
  }
  
  .nav-menu.active {
    right: 0;
  }
  
  .nav-menu li {
    margin: var(--spacing-md) 0;
  }
  
  .nav-toggle {
    display: flex;
    z-index: var(--z-fixed);
  }
  
  .projects-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    flex-direction: column;
    gap: var(--spacing-lg);
    text-align: center;
  }
  
  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
  }
  
  .footer-social {
    justify-content: center;
  }

  .achievement-card {
    padding: var(--spacing-lg);
  }
  
  .achievement-icon {
    width: 60px;
    height: 60px;
  }
  
  .achievement-icon i {
    font-size: 1.5rem;
  }
  
  .certification-logo {
    height: 150px;
  }
}

/* Very Small Devices (Under 576px) */
@media (max-width: 575px) {
  :root {
    --container-width: 100%;
    --section-padding: 2.5rem 0;
  }
  
  .container {
    width: 90%;
  }
  
  .hero-text h1 {
    font-size: var(--font-size-3xl);
  }
  
  .hero-text h2 {
    font-size: var(--font-size-xl);
  }
  
  .hero-buttons {
    flex-direction: column;
    gap: var(--spacing-sm);
  }
  
  .btn {
    width: 100%;
  }
  
  .about-info {
    grid-template-columns: 1fr;
  }
  
  .section-header {
    margin-bottom: var(--spacing-xl);
  }
}