body {
    display: flex;
    justify-content: center;
    align-items: center;
    background: radial-gradient(circle at top left, #4f46e5, var(--background));
    min-height: 100vh;
    padding: 1rem;
}

.game-container {
    width: 100%;
    max-width: 450px;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.game-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--surface-border);
}

.btn-back {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    background: transparent;
}

.page-title {
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--primary);
    margin: 0;
}

.stats-bar {
    display: flex;
    justify-content: space-between;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-muted);
}

.stats-bar .highlight {
    color: var(--text);
}

.quiz-zone {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    margin-top: 1rem;
    margin-bottom: 2rem;
}

.prompt-label {
    font-size: 1rem;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.main-card {
    width: 180px;
    height: 180px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: var(--radius-lg);
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    background: var(--surface-glass);
    border: 1px solid var(--surface-border);
}

.main-char {
    font-size: 6rem;
    font-weight: 900;
    color: var(--text);
}

.main-char.kr-mode { font-family: var(--font-kr); }
.main-char.en-mode { font-family: var(--font-ui); }

.options-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.option-btn {
    appearance: none;
    background: var(--surface-glass);
    border: 2px solid var(--surface-border);
    color: var(--text);
    padding: 1.5rem;
    font-size: 2rem;
    font-weight: 800;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.15s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    outline: none;
    -webkit-tap-highlight-color: transparent;
}

.option-btn.kr-mode { font-family: var(--font-kr); font-size: 3rem; }
.option-btn.en-mode { font-family: var(--font-ui); }

.option-btn:hover {
    transform: translateY(-3px);
    background: var(--surface);
    border-color: var(--primary);
    box-shadow: 0 10px 20px rgba(139, 92, 246, 0.2);
}

.option-btn:active {
    transform: scale(0.95);
}

.option-btn.correct {
    background: var(--success);
    border-color: var(--success);
    color: white;
}

.option-btn.wrong {
    background: rgba(239, 68, 68, 0.4);
    border-color: var(--error);
}

.congrats-screen {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 90%;
    padding: 3rem 1.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    z-index: 100;
    text-align: center;
    box-shadow: 0 20px 50px rgba(0,0,0,0.6);
    background: var(--surface-glass);
}
.congrats-screen.hidden {
    display: none;
}