/* Reset */
  * {
    box-sizing: border-box;
    scroll-behavior: smooth;
    margin: 0;
    padding: 0;
  }
  body {
    font-family: 'Poppins', sans-serif;
    background: var(--bg);
    color: var(--text);
    transition: background-color 0.5s ease, color 0.5s ease;
    min-height: 100vh;
    overflow-x: hidden;
  }

  section {
      scroll-snap-align: start;
      scroll-margin-top: 100px;
      min-height: 100vh;
      display: flex;
      justify-content: center;
      align-items: center;
      padding: 1rem 1rem;
      max-width: 1000px;
      font-size: 120%;
      margin: 0 auto;
      animation: fadeInUp 1s ease forwards;
      flex-direction: column;
    }
    @keyframes fadeInUp {
      0% {
        opacity: 0;
        transform: translateY(20px);
      }
      100% {
        opacity: 1;
        transform: translateY(0);
      }
    }

  /* Variables for light theme */
  :root {
    --bg: #f0f0f0;
    --text: #222222;
    --header-bg: linear-gradient(-45deg, #00c3ff, #ff6ec4, #f9d423);
    --card-bg: rgba(255 255 255 / 0.25);
    --card-shadow: rgba(31 38 135 / 0.37);
    --link-color: #00c3ff;
    --glow-color: #00c3ff;
  }

  /* Variables for dark theme */
  #toggle:checked ~ .page-wrapper {
    --bg: #121212;
    --text: #e0e0e0;
    --header-bg: linear-gradient(-45deg, #00c3ff, #d02947, #396ebe);
    --card-bg: rgba(255 255 255 / 0.05);
    --card-shadow: rgba(0 0 0 / 0.7);
    --link-color: #4acff1;
    --glow-color: #00ffff;
  }

  /* Hide checkbox */
  #toggle {
    display: none;
  }

  /* Toggle Label (moon icon) */
  label.toggle-label {
    cursor: pointer;
    background: var(--link-color);
    color: white;
    padding: 10px 16px;
    border-radius: 30px;
    font-weight: bold;
    box-shadow: 0 0 10px var(--link-color), 0 0 20px var(--link-color);
    user-select: none;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3em;
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
  }

  label.toggle-label:hover {
    background: var(--glow-color);
    box-shadow: 0 0 20px var(--glow-color), 0 0 40px var(--glow-color);
  }

  /* Header flex container */
  header.main-header {
    display: flex;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    align-items: center;
    justify-content: space-between;
    padding: 25px 20px;
    background: var(--header-bg);
    background-size: 400% 400%;
    animation: gradientBG 15s ease infinite;
    color: white;
  }

  @keyframes gradientBG {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
  }

  /* Header items order */
  label.toggle-label {
    order: 0;
  }
  header.main-header h1 {
    order: 1;
    user-select: none;
    margin-left: 15px;
    flex-grow: 1;
  }
  nav.main-nav {
    order: 2;
  }

  nav.main-nav ul {
    display: flex;
    gap: 25px;
    font-size: 1.2rem;
    list-style: none;
  }
  nav.main-nav ul li a {
    color: white;
    text-decoration: none;
    font-weight: 600;
    padding: 8px 12px;
    border-radius: 8px;
    transition: background-color 0.3s ease;
  }
  nav.main-nav ul li a:hover,
  nav.main-nav ul li a:focus {
    background-color: powderblue;
    outline: none;
  }

  /* Page wrapper */
  .page-wrapper {
    min-height: 100vh;
    background: var(--bg);
    color: var(--text);
    transition: background-color 0.5s ease, color 0.5s ease;
    padding: 20px;
  }

  /* Cards styling */
  .card {
    background: var(--card-bg);
    backdrop-filter: blur(15px);
    border-radius: 20px;
    box-shadow: 0 8px 32px var(--card-shadow);
    padding: 40px;
    margin: 40px auto;
    max-width: 850px;
    transition: transform 0.3s, background 0.3s;
  }

  /* About section image */
  .card img {
    border-radius: 50%;
    width: 200px;
    height: 200px;
    object-fit: cover;
    border: 4px solid var(--link-color);
    margin-bottom: 20px;
    transition: transform 0.3s ease;
  }

   section h1 {
      font-size: 3rem;
      margin-bottom: 1rem;
    }

  #about img {
      border: 3px solid #12bdff;
      border-radius: 50%;
      width: 300px;
      height: 300px;
      box-shadow: 3px 5px 30px #03506e;
      object-fit: cover;
      transition: transform 0.3s ease;
      margin-bottom: 1.5rem;
    }

    #about img:hover {
      transform: scale(1.1);
      box-shadow: 0 10px 30px rgba(18,196,220,0.6);
    }
    #about h1{
      margin-top: 3rem;
    }
    
  #about p {
      font-size: 1.4rem;
      margin: 0.3rem 0;
      text-align: center;
      font-weight: 500;
    }
    #about p span {
      color: #12c4dc;
      font-size: 2rem;
      font-weight: 700;
    }

  /* Skills */
  .skills {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 50px;
  }
  .skill {
    background: var(--card-bg);
    padding: 1.5rem 2rem;
    border-radius: 15px;
    flex: 1 1 150px;
    text-align: center;
    box-shadow: 0 4px 20px var(--card-shadow);
    transition: background-color 0.3s;
    width: 200px;     
    height: 250px; 
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
  }
  .skill:hover {
      background-color: #090a0b;
      transform: translateY(-8px);
    }
  .skill i {
    font-size: 8rem;
    text-align: center;
    margin-bottom: 10px;
    color: var(--link-color);
  }

  /* Projects section */
  .projects {
    display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); 
  gap: 30px;
  justify-items: center;
  padding: 1rem;
  max-width: 1000px; 
  margin: 0 auto;
  }

  .project {
    width: 220px;
  max-width: 250px;
  height: 330px;
    perspective: 1000px;
    display: flex;
    justify-content: center;
    align-items: center;
  }

  #projects {
  padding: 1rem 0.5rem;
}


  .project-inner {
    position: relative;
    width: 220px;
    height: 330px;
    text-align: center;
    transition: transform 0.6s;
    transform-style: preserve-3d;
    box-shadow: 0 8px 20px var(--card-shadow);
    border-radius: 20px;
    background: var(--card-bg);
    cursor: pointer;
  }

  .project:hover .project-inner,
  .project:focus-within .project-inner {
    transform: rotateY(180deg);
  }

  .project-front,
  .project-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: 20px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 15px;
    
  }

  .project-front img {
    width: 100%;
    height: 180px;
    align-items: center;
    justify-content: center;
    object-fit: contain;
    border-radius: 20px;
    background-color: white;
    border: 3px solid var(--link-color);
  }

  

  .project-front p {
    font-weight: 600;
    color: var(--text);
  }

  .project-back {
    background: var(--link-color);
    color: #111;
    transform: rotateY(180deg);
    font-weight: 600;
    font-size: 1.1em;
    padding: 20px;
  }

  .achievements {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: center;
  margin-top: 20px;
 }

   
.achievement {
  flex: 1 1 250px;
  background: var(--card-bg);
  color: var(--text);
  font-weight: 700;
  border-radius: 15px;
  padding: 20px;
  box-shadow: 0 4px 20px var(--card-shadow);
  text-align: center;
  transition: transform 0.3s ease, background 0.3s ease;
  backdrop-filter: blur(10px);
  display: flex;              
  flex-direction: column;     
  justify-content: center;    
  align-items: center;
}

.achievement h3{
  color: rgb(46, 186, 205) ;
}
.achievement:hover {
  transform: translateY(-5px);
  background: rgba(0, 195, 255, 0.1);
}


  /* Resume & Contact section */
  #resume-contact {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin:40px auto;
    max-width: 1000px;
    align-items: center;
    flex-wrap: wrap;  }

  .resume-box,
  .contact-box {
    background: var(--card-bg);
    box-shadow: 0 4px 20px var(--card-shadow);
    border-radius: 20px;
    width: 400px;
    padding: 2.5rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
    height: auto;
    min-height: 240px;
    transition: box-shadow 0.3s ease, background-color 0.3s ease;
    cursor: pointer;
    
  }

  .resume-box:hover,
  .resume-box:focus-within,
  .contact-box:hover,
  .contact-box:focus-within {
    box-shadow: 0 0 30px var(--link-color), 0 0 60px var(--link-color);
    background-color: rgba(0 255 255 / 0.1);
  }

  .resume-box h1,
  .contact-box h1 {
    margin-bottom: 1rem;
    padding-top: 1.5rem;
    color: var(--text);
  }

  .resume-box a {
    color: var(--link-color);
    font-weight: 600;
    text-decoration: none;
    font-size: 1.1em;
    margin-bottom: 2rem;
    padding: 1.2rem;
    display: inline-block;
    background: #57b1c8;
    color: white;
  }

  .contact-box a {
    color: var(--link-color);
    font-weight: 600;
    text-decoration: none;
    font-size: 1.1em;
    gap: 1rem;
  }

  .resume-box a:hover,
  .contact-box a:hover,
  .resume-box a:focus,
  .contact-box a:focus {
    text-decoration: underline;
    outline: none;
  }

  /* Contact icons */
  .contact-icons {
    margin-top: 15px;
    display: flex;
    justify-content: center;
    gap: 20px;
  }

  .contact-icons a {
    color: var(--link-color);
    font-size: 1.8em;
    transition: color 0.3s ease;
  }

  .contact-icons a:hover,
  .contact-icons a:focus {
    color: var(--text);
    outline: none;
  }

   footer {
      background-color: #296d7e;
      color: white;
      text-align: center;
      padding: 1rem;
      margin-top: 3rem;
      font-weight: 600;
      letter-spacing: 0.05em;
    }


  /* Responsive */
  @media (max-width: 768px) {
    #about {
    padding-top: 120px;
    scroll-margin-top: 120px;
  }
  
    .projects {
    display: grid;
    grid-template-columns: 1fr !important;
    gap: 20px;
    padding: 0 1rem;
    max-width: 100%;
    margin: 0 auto;
  }

  .project {
    width: 100%;       
    max-width: 350px;  
    height: auto;      
  }

  .project-front img {
    height: auto;     
    max-width: 100%;
  }

    nav.main-nav ul {
      flex-wrap: wrap;
      justify-content: center;
      gap: 15px;
    }

    header.main-header h1 {
      font-size: 1.5em;
      margin-left: 10px;
    }
    #resume-contact {
    flex-direction: column;
    max-width: 100%;
    padding: 0 1rem;
  }

  .resume-box,
  .contact-box {
    width: 100%;
    max-width: 400px;
    padding: 1.5rem 2rem;
    margin: 0 auto 1.5rem auto;
    min-height: auto;
  }
      .contact-icons {
        justify-content: center;
        flex-wrap: wrap;
        gap: 1.5rem;
      }
  }

   @media (min-width: 1024px) {
  .projects {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;  
    justify-content: center;
    align-items: center;
    gap: 30px;
  }

  .project {
    width: 300px; 
    max-width: 300px;
    height: auto;
  }

  .skills {
    flex-wrap: nowrap;
    justify-content: space-between;
  }
  .skill {
    flex: 1 1 30%;
    max-width: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
  }
  .skill p {
    text-align: center;
    margin: 0;
  }
  .achievement {
    height: 200px;
  }
  
  .resume-box, .contact-box {
    padding: 1.5rem;
    min-height: 200px;
    margin-top: .2rem;
  }
}