:root {
        --primary: #4CAF50;
        --secondary: #2196F3;
        --danger: #f44336;
        --bg-default: lightblue;
        --bg-success: #74f57a;
        --bg-error: #ff7c72;
    }

    .game-wrapper {
        border: 4px solid #fff;
        background: var(--bg-default);
        padding: 0;
        border-radius: 24px;
        position: relative;
        margin-bottom: 40px;
        height: 45rem;
        box-shadow: 0 20px 40px rgba(0,0,0,0.1);
        overflow: hidden;
        display: flex;
        flex-direction: column;
        font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        transition: background 0.4s ease; /* Renk geçişi yumuşak olsun */
    }

    /* Arka Plan Durumları */
    .bg-correct { background: var(--bg-success) !important; }
    .bg-wrong { background: var(--bg-error) !important; }

    /* Alt Bar (Kontroller) */
    .bottom-bar {
        background: rgba(255, 255, 255, 0.9);
        padding: 15px 25px;
        display: flex;
        justify-content: space-between;
        align-items: center;
        border-top: 2px solid rgba(0,0,0,0.05);
        z-index: 10;
    }

    /* Ekranlar */
    .screen { display: none; flex: 1; padding: 20px; position: relative; width: 100%; box-sizing: border-box; }
    .screen.active { display: flex; flex-direction: column; justify-content: center; align-items: center; }

    /* Soru Tasarımı */
    .question-container {
        flex: 1;
        width: 100%;
        display: flex;
        flex-direction: column;
        justify-content: space-around;
        align-items: center;
    }

    .question-text-area {
        background: antiquewhite;
        width: 85%;
        min-height: 160px;
        display: flex;
        align-items: center;
        justify-content: center;
        padding: 25px;
        border-radius: 20px;
        text-align: center;
        box-shadow: 0 8px 15px rgba(0,0,0,0.05);
    }

    #questionText { font-size: 1.8rem; color: #333; margin: 0; line-height: 1.4; }

    .answers-area {
        width: 85%;
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 20px;
    }

    .btn-answer {
        border: none;
        padding: 20px;
        border-radius: 15px;
        font-size: 1.4rem;
        font-weight: bold;
        cursor: pointer;
        transition: transform 0.2s;
        color: white;
    }

    .btn-true { background: #4CAF50; box-shadow: 0 4px 0 #388E3C; }
    .btn-false { background: #F44336; box-shadow: 0 4px 0 #D32F2F; }
    .btn-answer:hover { transform: translateY(-3px); }
    .btn-answer:active { transform: translateY(2px); box-shadow: none; }

    /* Sonuç Ekranı */
    .result-card {
        background: white;
        padding: 30px;
        border-radius: 25px;
        text-align: center;
        width: 80%;
        box-shadow: 0 15px 30px rgba(0,0,0,0.1);
    }

    .progress-track {
        width: 100%;
        height: 20px;
        background: #eee;
        border-radius: 50px;
        margin: 20px 0;
        overflow: hidden;
    }
    .progress-fill {
        height: 100%;
        width: 0%;
        background: linear-gradient(90deg, #4CAF50, #8BC34A);
        transition: width 1s ease-out;
    }

    /* Badge & İkonlar */
    .badge {
        padding: 8px 16px;
        border-radius: 50px;
        font-weight: bold;
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 0.9rem;
    }
    #timer { background: #fff3e0; color: #ef6c00; }
    #progress { background: #e3f2fd; color: #1565c0; }
    .fs-toggle { cursor: pointer; color: #757575; font-size: 1.3rem; transition: 0.2s; }
    .fs-toggle:hover { color: #333; transform: scale(1.1); }

    .hidden { visibility: hidden; pointer-events: none; }