@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

body {
    font-family: 'Inter', sans-serif;
    background-color: #f3f4f6;
}

.option-btn {
    transition: all 0.2s;
}

.option-btn:hover:not(:disabled) {
    transform: translateX(5px);
    background-color: #e5e7eb;
}

.correct {
    background-color: #d1fae5 !important;
    border-color: #059669 !important;
    color: #065f46 !important;
}

.incorrect {
    background-color: #fee2e2 !important;
    border-color: #dc2626 !important;
    color: #991b1b !important;
}

.selected {
    background-color: #dbeafe !important;
    border-color: #3b82f6 !important;
    color: #1e3a8a !important;
}

.fade-in {
    animation: fadeIn 0.3s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.grid-btn {
    transition: all 0.15s;
}

.grid-btn.answered {
    background-color: #3b82f6;
    color: white;
    border-color: #2563eb;
}

.grid-btn.answered-correct {
    background-color: #10b981;
    color: white;
    border-color: #059669;
}

.grid-btn.answered-incorrect {
    background-color: #ef4444;
    color: white;
    border-color: #dc2626;
}

.grid-btn.active {
    box-shadow: 0 0 0 2px white, 0 0 0 4px #3b82f6;
}