/* Main CSS for logic-bound styles (Refactoring) */
@import url('1-variables.css');
@import url('2-base.css');
@import url('3-buttons.css');
@import url('4-users.css');
@import url('5-game.css');
@import url('6-problems.css');
@import url('7-config.css');
@import url('8-store.css');
@import url('9-help.css');
@import url('10-responsive.css');
@import url('11-animations.css');
@import url('12-achievements.css');
@import url('13-numbers-game.css');


/* Language Buttons */
.language-btn {
    border-color: #ddd;
    background: white;
    transition: all 0.3s ease;
}

.language-btn.active {
    border-color: var(--primary);
    background: #f0f7ff;
}

/* Problem UI toggling */
.ui-grid {
    display: grid;
}

.ui-block {
    display: block;
}

.hidden {
    display: none !important;
}

/* Store Items (moved from inline or ensuring compatibility) */
.store-item.locked {
    opacity: 0.7;
    filter: grayscale(1);
}

.coin-flash {
    animation: coinFlash 0.5s ease;
}

@keyframes coinFlash {
    0% { transform: scale(1); color: #f1c40f; }
    50% { transform: scale(1.5); color: #2ecc71; }
    100% { transform: scale(1); color: #f1c40f; }
}

/* Achievement card styles (templates) */
.achievement-card {
    display: flex;
    align-items: center;
    background: white;
    border-radius: 12px;
    padding: 15px;
    margin-bottom: 15px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    transition: transform 0.2s;
}

.achievement-card:hover {
    transform: translateY(-2px);
}

.achievement-card.locked {
    opacity: 0.7;
    background: #f8f9fa;
}

.achievement-card.unlocked {
    border-left: 5px solid #2ecc71;
}

.achievement-icon {
    font-size: 2rem;
    margin-right: 15px;
}

.achievement-info {
    flex: 1;
}

.achievement-name {
    font-weight: bold;
    font-size: 1.1rem;
    margin-bottom: 4px;
}

.achievement-desc {
    font-size: 0.9rem;
    color: #666;
    margin-bottom: 8px;
}

.achievement-progress {
    background: #eee;
    height: 8px;
    border-radius: 4px;
    overflow: hidden;
    margin-top: 5px;
    position: relative;
}

.progress-fill {
    height: 100%;
    background: #3498db;
    width: 0%;
}

.achievement-card.unlocked .progress-fill {
    background: #2ecc71;
}

.achievement-status {
    font-size: 1.5rem;
    margin-left: 10px;
}