body {
            font-family: 'Segoe UI', Tahoma, sans-serif;
            max-width: 100%;
            margin: 0 auto;
            padding: 20px;
            background-color: #fff9fb;
            color: #333;
        }
        h1 {
            color: #c2185b;
            text-align: center;
            font-size: 26px;
            margin-bottom: 25px;
        }
        .calculator {
            background: white;
            padding: 25px;
            border-radius: 12px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
        }
        .measurement-group {
            margin-bottom: 20px;
        }
        .unit-tabs {
            display: flex;
            margin-bottom: 10px;
        }
        .unit-tab {
            padding: 8px 15px;
            background: #f0f0f0;
            cursor: pointer;
            border-radius: 5px 5px 0 0;
            margin-right: 5px;
        }
        .unit-tab.active {
            background: #c2185b;
            color: white;
        }
        .input-group {
            display: none;
        }
        .input-group.active {
            display: block;
        }
        input {
            width: 100%;
            padding: 12px;
            margin: 8px 0;
            border: 1px solid #e0a8c0;
            border-radius: 6px;
            font-size: 16px;
        }
        button {
            background-color: #c2185b;
            color: white;
            border: none;
            padding: 14px;
            border-radius: 6px;
            cursor: pointer;
            width: 100%;
            font-size: 16px;
            font-weight: bold;
            margin-top: 15px;
            transition: background 0.3s;
        }
        button:hover {
            background-color: #ad1457;
        }
        #result {
            margin-top: 25px;
            padding: 20px;
            background: #fce4ec;
            border-left: 4px solid #c2185b;
            border-radius: 6px;
            display: none;
        }
        .sister-sizes {
            margin: 15px 0;
            padding: 10px;
            background: #f8bbd0;
            border-radius: 5px;
        }
        .note {
            font-size: 14px;
            color: #666;
            margin-top: 10px;
        }
        .highlight {
            color: #c2185b;
            font-weight: bold;
        }