:root {
      --main-bg: linear-gradient(135deg, #ff9a9e, #fad0c4);
      --section-bg: #ffffffcc;
      --highlight:  #ff6f61;
      --text: #2c2c2c;
      --shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    }
    
    * {
      box-sizing: border-box;
    }

    body {
      margin: 0;
      font-family: 'Hind Siliguri', sans-serif;
      background: var(--main-bg);
      color: var(--text);
      display: flex;
      flex-direction: column;
      align-items: center;
      scroll-behavior: smooth;
      min-height: 100vh;
    }
    
    header {
      width: 100%;
      background: #ffffffcc;
      backdrop-filter: blur(8px);
      box-shadow: var(--shadow);
      display: flex;
      justify-content: center;
      gap: 1rem;
      padding: 1rem;
      position: sticky;
      top: 0;
      z-index: 1000;
    }

    header a {
      text-decoration: none;
      color: var(--highlight);
      background: #fff;
      padding: 0.5rem 1rem;
      border-radius: 999px;
      font-weight: bold;
      box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
      transition: 0.2s;
    }
    
    header a.active {
  background: var(--highlight);
  color: #fff;
}

    header a:hover {
      background: var(--highlight);
      color: #fff;
    }

    section {
      width: 90%;
      max-width: 600px;
      background: var(--section-bg);
      padding: 1.5rem;
      margin: 1rem 0;
      border-radius: 1rem;
      box-shadow: var(--shadow);
      opacity: 0;
      transform: translateY(30px);
      transition: all 0.6s ease;
}

section.visible {
  opacity: 1;
  transform: translateY(0);
}

 @keyframes fadeIn {
      from {opacity: 0; transform: translateY(30px);}
      to {opacity: 1; transform: translateY(0);}
    }

    h2 {
      margin-top: 0;
      color: var(--highlight);
    }
    
    .contact-button {
  background: #ff5e57;    
  color: white;             /* টেক্সট সাদা */
  border: none;
  padding: 0.8rem 1.2rem;
  border-radius: 0.5rem;
  font-weight: bold;
  cursor: pointer;
  transition: background 0.3s;
  box-shadow: var(--shadow);
}

.contact-button:hover {
  background: #ff6f61;      
}

.button {
  display: inline-block; /* a tag-এর জন্য দরকার */
  margin-top: 1rem;
  padding: 0.6rem 1.2rem;
  background: var(--highlight);
  color: #fff;
  border: none;
  border-radius: 0.5rem;
  font-weight: bold;
  text-decoration: none; /* underline বন্ধ করবে */
  box-shadow: var(--shadow);
  transition: 0.3s;
  text-align: center;
}


    .button:hover {
      transform: scale(1.05);
    }
    
    canvas {
      touch-action: manipulation;
      width: 100%;
      max-width: 500px;
      aspect-ratio: 1 / 1;
      background: #fefefe;
      border: 2px solid #333;
      border-radius: 10px;
      margin-top: 10px;
      display: block;
      margin: 10px auto;
    }

    #message {
      margin-top: 10px;
      font-size: 1.2em;
      color: #00695c;
      text-align: center;
    }
    
     #weather {
  background: #fff;
  padding: 1rem;
  border-radius: 1rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  text-align: center;
  line-height: 1.6;
  animation: fadeIn 1s ease forwards;
}

#weather h2 {
  color: var(--highlight);
  margin-bottom: 0.5rem;
}

#weather .temp {
  font-size: 2.5rem;
  font-weight: bold;
  color: #d32f2f;
}

#weather .desc {
  font-size: 1.2rem;
  color: #555;
}

#weather img {
  width: 80px;
  height: 80px;
}


    .quote-box {
      background: #fff;
      padding: 1rem;
      border-radius: 0.75rem;
      box-shadow: var(--shadow);
      line-height: 1.6;
    }

    footer {
      margin: 2rem 0;
    }
    
    footer button {
      background: #ffd166;
      border: none;
      padding: 0.8rem 1.2rem;
      border-radius: 0.5rem;
      font-weight: bold;
      cursor: pointer;
      transition: background 0.3s;
    }

    footer button:hover {
      background: #fcbf49;
    }
    
    @keyframes confettiFall {
  0% {
    transform: translateY(0) rotate(0deg);
    opacity: 1;
  }
  100% {
    transform: translateY(100vh) rotate(720deg);
    opacity: 0;
  }
}

#dots {
  display: inline-block;
  width: 1.5em;
  text-align: left;
}


/* Tab Section Layout */
.tab-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.2rem;
  margin-top: 2rem;
}

.tab-feature {
  background: #ffffffcc;
  color: #2c2c2c;
  padding: 1.2rem;
  text-align: center;
  border-radius: 1rem;
  font-weight: bold;
  text-decoration: none;
  box-shadow: var(--shadow);
  transition: transform 0.3s, background 0.3s;
  border: 2px solid var(--highlight);
}

.tab-feature:hover {
  background: var(--highlight);
  color: #fff;
  transform: scale(1.05);
}

.about-section {
  margin-top: 3rem;
  text-align: center;
}


@keyframes glow {
      from {
        text-shadow: 0 0 5px #fff, 0 0 10px #ff;
      }
      to {
        text-shadow: 0 0 10px #ffff, 0 0 20px white;
      }