:root {
      --primary: #2bbf9c;   /* Seafoam green */
      --secondary: #1a3d4d; /* Deep navy */
      --light: #f9fdfb;     /* Very light mint background */
      --dark: #222;         /* Neutral dark text */
      --card-bg: #ffffff;   /* Clean white for cards */
    }

    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
      font-family: 'Poppins', sans-serif;
    }

    body {
      background: var(--light);
      color: var(--dark);
      line-height: 1.6;
      scroll-behavior: smooth;
    }

    header {
      background: var(--secondary);
      color: var(--light);
      padding: 1.5rem 3rem;
      text-align: center;
      position: sticky;
      top: 0;
      z-index: 100;
      box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    }

    header h1 {
      font-size: 2rem;
      font-weight: 700;
      letter-spacing: 1px;
    }

    nav {
      margin-top: 0.5rem;
    }

    nav a {
      color: var(--light);
      text-decoration: none;
      margin: 0 1rem;
      font-weight: 500;
      transition: color 0.3s ease, border-bottom 0.3s ease;
      padding-bottom: 3px;
    }

    nav a:hover {
      color: var(--primary);
      border-bottom: 2px solid var(--primary);
    }

    /* --- HERO SECTION --- */
    .hero {
      background: linear-gradient(to bottom, var(--secondary), var(--primary));
      color: var(--light);
      text-align: center;
      padding: 6rem 2rem 4rem;
      position: relative;
    }

    .hero h1 {
      font-size: 3rem;
      font-weight: 700;
      margin-bottom: 1rem;
      animation: fadeInDown 1s ease;
    }

    .hero p {
      font-size: 1.3rem;
      font-weight: 300;
      animation: fadeInUp 1.2s ease;
    }

    .wave {
      position: absolute;
      bottom: 0;
      left: 0;
      width: 100%;
      overflow: hidden;
      line-height: 0;
    }

    .wave svg {
      position: relative;
      display: block;
      width: calc(150% + 1.3px);
      height: 100px;
    }

    .wave path {
      fill: var(--light);
    }

    /* --- ANIMATIONS --- */
    @keyframes fadeInDown {
      from { opacity: 0; transform: translateY(-20px); }
      to { opacity: 1; transform: translateY(0); }
    }

    @keyframes fadeInUp {
      from { opacity: 0; transform: translateY(20px); }
      to { opacity: 1; transform: translateY(0); }
    }

    section {
      padding: 4rem 2rem;
      max-width: 1000px;
      margin: auto;
    }

    section h2 {
      text-align: center;
      font-size: 2.2rem;
      margin-bottom: 2.5rem;
      color: var(--secondary);
    }

    .about {
      text-align: center;
      font-size: 1.1rem;
      max-width: 700px;
      margin: auto;
    }

    .projects {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 2rem;
    }

    .card {
      background: var(--card-bg);
      border-radius: 15px;
      box-shadow: 0 4px 12px rgba(0,0,0,0.1);
      padding: 1.5rem;
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      border-top: 5px solid var(--primary);
    }

    .card:hover {
      transform: translateY(-7px);
      box-shadow: 0 10px 25px rgba(0,0,0,0.15);
    }

    .card h3 {
      margin-bottom: 1rem;
      color: var(--primary);
    }

    .card p {
      font-size: 0.95rem;
    }

    footer {
      background: var(--secondary);
      color: var(--light);
      text-align: center;
      padding: 1rem;
      margin-top: 2rem;
      font-size: 0.9rem;
    }

    footer a {
      color: var(--primary);
      text-decoration: none;
      font-weight: 500;
    }