* {
      box-sizing: border-box;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
    }

    body {
      margin: 0;
      min-height: 100vh;
      background: linear-gradient(135deg, #e9edf3, #f7f9fc);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #1c1c1e;
    }

    .center-card {
      background: white;
      width: 420px;
      padding: 40px 36px 42px;
      border-radius: 18px;
      box-shadow: 0 25px 60px rgba(0, 0, 0, 0.15);
      text-align: center;
    }

    .center-card h1 {
      margin-bottom: 6px;
      font-size: 32px;
      font-weight: 700;
    }

    .subtitle {
      color: #6b7280;
      margin-bottom: 28px;
      font-size: 15px;
    }

    input {
      width: 100%;
      padding: 14px 16px;
      margin-bottom: 14px;
      border-radius: 10px;
      border: 1px solid #d1d5db;
      font-size: 15px;
      outline: none;
      background: #fafafa;
      transition: 0.2s ease;
    }

    input:focus {
      border-color: #2563eb;
      background: white;
      box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
    }

    button {
      width: 100%;
      padding: 14px;
      border-radius: 10px;
      border: none;
      background: linear-gradient(135deg, #2563eb, #1d4ed8);
      color: white;
      font-size: 16px;
      font-weight: 600;
      cursor: pointer;
      transition: transform 0.15s ease, box-shadow 0.15s ease;
      box-shadow: 0 10px 22px rgba(37, 99, 235, 0.35);
    }

    button:hover {
      transform: translateY(-1px);
      box-shadow: 0 14px 30px rgba(37, 99, 235, 0.4);
    }

    .join-section input {
      margin-bottom: 12px;
    }

    .error {
      color: #dc2626;
      margin-top: 12px;
      font-size: 14px;
    }
.dev-credit {
  position: fixed;
  right: 14px;
  bottom: 12px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.dev-credit h3 {
  margin: 0;
  display: inline-block;
  font-size: 13px;
}