:root {
            --bg-color: #F5F7FA;
            --text-color: #2C3E50;
            --card-bg: #FFFFFF;
            --primary-color: #4A90E2;
            --primary-hover: #357ABD;
            --border-color: #E2E8F0;
        }

        body {
            background-color: var(--bg-color);
            color: var(--text-color);
            font-family: 'Noto Sans TC', sans-serif;
            display: flex;
            flex-direction: column;
            align-items: center;
            margin: 0;
            padding: 40px 20px;
            min-height: 100vh;
        }

        h1 {
            font-weight: 700; font-size: 2rem; margin-bottom: 30px; letter-spacing: 1px;
        }

        .control-panel {
            background: var(--card-bg); padding: 24px; border-radius: 16px;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05); display: flex; gap: 20px;
            margin-bottom: 24px; flex-wrap: wrap; justify-content: center;
            border: 1px solid var(--border-color);
        }

        .control-group { display: flex; align-items: center; gap: 10px; }

        input, select {
            background-color: #F8FAFC; color: var(--text-color);
            border: 1px solid var(--border-color); border-radius: 8px;
            font-family: 'Noto Sans TC', sans-serif; font-size: 1rem;
            padding: 10px 16px; outline: none;
        }

        button.action-btn {
            background-color: var(--bg-color); color: var(--text-color);
            border: 1px solid var(--border-color); border-radius: 8px;
            font-family: 'Noto Sans TC', sans-serif; font-size: 1rem;
            padding: 10px 16px; cursor: pointer;
        }
        button.action-btn:hover { background-color: #E2E8F0; }

        .data-display {
            color: #64748B; margin-bottom: 30px; font-size: 0.95rem;
        }

        #wheel-container {
            position: relative; width: 380px; height: 380px; margin-top: 20px;
            filter: drop-shadow(0 10px 20px rgba(0,0,0,0.08));
        }

        #wheelCanvas {
            width: 100%; height: 100%; border-radius: 50%;
            transition: transform 4s cubic-bezier(0.2, 0.8, 0.2, 1);
            background-color: var(--card-bg);
        }

        #pointer {
            position: absolute; top: -15px; left: 50%; transform: translateX(-50%);
            width: 0; height: 0;
            border-left: 15px solid transparent; border-right: 15px solid transparent;
            border-top: 30px solid var(--text-color); z-index: 10;
        }

        button.spin-btn {
            padding: 14px 40px; font-size: 1.2rem; font-weight: 700;
            background-color: var(--primary-color); color: #fff; border: none;
            border-radius: 50px; cursor: pointer; margin-top: 10px;
            font-family: 'Noto Sans TC', sans-serif; box-shadow: 0 4px 12px rgba(74, 144, 226, 0.3);
        }
        button.spin-btn:hover { background-color: var(--primary-hover); }

        #resultText {
            margin-top: 40px; font-size: 1.5rem; font-weight: 700;
            color: var(--text-color); text-align: center; min-height: 40px;
        }