* {
      box-sizing: border-box;
    }

    body {
      margin: 0;
      font-family: 'Inter', sans-serif;
      background: #f0f4f8;
      display: flex;
      justify-content: center;
      align-items: center;
      min-height: 100vh;
      padding: 20px;
    }

    .container {
      background: #ffffff;
      padding: 25px 20px;
      border-radius: 16px;
      box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
      text-align: center;
      max-width: 400px;
      width: 100%;
    }

    h1 {
      font-size: 22px;
      color: #1e293b;
      margin-bottom: 18px;
    }

    input {
      padding: 12px 14px;
      font-size: 16px;
      border: 1px solid #cbd5e1;
      border-radius: 10px;
      width: 100%;
      max-width: 260px;
      margin-bottom: 10px;
    }

    button {
      padding: 12px 16px;
      font-size: 16px;
      background-color: #3b82f6;
      color: white;
      border: none;
      border-radius: 10px;
      cursor: pointer;
      transition: background-color 0.2s ease-in-out;
      margin-top: 10px;
    }

    button:hover {
      background-color: #2563eb;
    }

    #results {
      margin-top: 20px;
      text-align: left;
    }

    #results h3 {
      margin-bottom: 12px;
      color: #1e40af;
      font-size: 18px;
      text-align: center;
    }

    .time-entry {
      background: #f1f5f9;
      padding: 10px 14px;
      margin: 6px 0;
      border-radius: 10px;
      display: flex;
      justify-content: space-between;
      font-size: 16px;
      color: #334155;
    }

    @media (max-width: 480px) {
      .container {
        padding: 20px 15px;
      }
      input {
        font-size: 15px;
      }
      button {
        font-size: 15px;
      }
      .time-entry {
        font-size: 15px;
      }
    }