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

    :root {
      --bg: #08120f;
      --card: rgba(18, 30, 25, 0.9);
      --primary: #2ecc71;
      --text: #f3f5f4;
      --muted: #9fb3aa;
      --border: rgba(255,255,255,0.08);
      --shadow: 0 10px 30px rgba(0,0,0,0.35);
    }

    html, body {
      width: 100%;
      max-width: 100%;
      overflow-x: hidden;
    }

    body {
      font-family: 'Inter', sans-serif;
      background: linear-gradient(to bottom right, #06100d, #0d1b16);
      color: var(--text);
      min-height: 100vh;
    }

    .container {
      width: min(1100px, 92%);
      margin: auto;
    }

    header {
      position: sticky;
      top: 0;
      z-index: 100;
      backdrop-filter: blur(12px);
      background: rgba(5, 10, 8, 0.75);
      border-bottom: 1px solid var(--border);
    }

    /* .navbar {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 18px 0;
      gap: 20px;
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.2rem;
      font-weight: 800;
    }

    .logo-icon {
      width: 42px;
      height: 42px;
      border-radius: 12px;
      background: linear-gradient(135deg, var(--primary), #57f49f);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #04150d;
      font-weight: bold;
    }

    .nav-links {
      display: flex;
      gap: 24px;
      align-items: center;
    }

    .nav-links a {
      color: var(--muted);
      text-decoration: none;
      transition: 0.3s;
      font-weight: 500;
    }

    .nav-links a:hover {
      color: var(--text);
    } */

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border: none;
      cursor: pointer;
      background: linear-gradient(135deg, var(--primary), #4df59b);
      color: #04150d;
      padding: 14px 20px;
      border-radius: 14px;
      font-weight: 700;
      text-decoration: none;
      transition: 0.3s;
    } 

    .btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(46,204,113,0.25);
    }

    /* disabled button style */
    .btn:disabled {
      opacity: 0.5;
      cursor: not-allowed;
      transform: none;
      box-shadow: none;
    }

    .hero {
      padding: 80px 0 40px;
    }

    .hero-content {
      text-align: center;
      max-width: 760px;
      margin: auto;
    }

    .hero-content h1 {
      font-size: clamp(2.5rem, 6vw, 4rem);
      line-height: 1.1;
      margin-bottom: 22px;
    }

    .hero-content p {
      color: var(--muted);
      line-height: 1.8;
      font-size: 1.05rem;
    }

    .generator-section {
      padding: 20px 0 80px;
    }

    .generator-card {
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: 28px;
      padding: 32px;
      box-shadow: var(--shadow);
    }

    .input-group {
      margin-bottom: 22px;
    }

    .input-group label {
      display: block;
      margin-bottom: 10px;
      font-weight: 600;
    }

    .input-group input,
    .input-group select {
      width: 100%;
      border: 1px solid var(--border);
      background: rgba(255,255,255,0.04);
      color: white;
      padding: 16px;
      border-radius: 16px;
      outline: none;
      font-size: 1rem;
    }

    .result-box {
      margin-top: 30px;
      background: rgba(255,255,255,0.04);
      border: 1px solid var(--border);
      border-radius: 20px;
      padding: 22px;
    }

    pre {
      white-space: pre-wrap;
      word-break: break-word;
      line-height: 1.8;
      color: #d9f7e6;
    }

    .copy-btn {
      margin-top: 18px;
    }