* {
      box-sizing: border-box;
    }

    :root {
      --spring-green: #02F5A1;
      --spring-green-dark: #01c481;
      --deep-onyx: #07191E;
      --deep-onyx-light: #0f2830;
    }

    body {
      margin: 0;
      font-family: 'Segoe UI', sans-serif;
      background: linear-gradient(135deg, #07191E, #0d2731, #07191E);
      display: flex;
      justify-content: center;
      align-items: center;
      height: 100vh;
      color: white;
    }

    .login-box {
      background: var(--deep-onyx-light);
      padding: 40px 30px;
      border-radius: 12px;
      box-shadow: 0 0 30px rgba(2, 245, 161, 0.15);
      border: 1px solid rgba(2, 245, 161, 0.15);
      width: 100%;
      max-width: 400px;
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
    }

    .login-box img {
      width: 100px;
      margin-bottom: 20px;
    }

    .login-box h2 {
      margin-bottom: 20px;
      color: var(--spring-green);
      font-size: 24px;
    }

    .login-box input[type="text"],
    .login-box input[type="password"] {
      width: 100%;
      padding: 12px;
      margin: 10px 0;
      background: var(--deep-onyx);
      border: 1px solid #1a3038;
      border-radius: 6px;
      color: white;
      font-size: 15px;
    }

    .login-box input[type="text"]:focus,
    .login-box input[type="password"]:focus {
      outline: none;
      border-color: var(--spring-green);
    }

    .login-box button {
      background: var(--spring-green);
      color: var(--deep-onyx);
      padding: 12px;
      width: 100%;
      border: none;
      border-radius: 6px;
      font-size: 16px;
      font-weight: bold;
      margin-top: 10px;
      cursor: pointer;
      transition: background 0.3s ease;
    }

    .login-box button:hover {
      background: var(--spring-green-dark);
    }

    .error {
      margin-top: 15px;
      color: #ff7675;
      font-weight: bold;
    }