/* Study Selection UI - Modern Card Grid */

.study-selection-container {
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
    animation: fadeIn 0.4s ease;
}

.selection-header {
    text-align: center;
    margin-bottom: 40px;
    position: relative;
    /* Allow flex layout for better control if needed, but keeping block for compatibility with absolute back btn */
    min-height: 60px; /* Ensure space for absolute buttons */
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.selection-title {
    font-size: 2.2rem;
    color: var(--primary-color);
    font-weight: 800;
    margin-bottom: 5px;
}

.selection-subtitle {
    color: var(--light-text);
    font-size: 1.1rem;
    font-weight: 600;
}

.selection-back-btn {
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    background: white;
    border: 2px solid #E0E7FF;
    color: var(--light-text);
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    border-radius: 12px;
    transition: all 0.2s ease;
    z-index: 10;
    box-shadow: 0 2px 0 #E0E7FF;
}

.selection-back-btn:hover {
    background-color: #F8FAFC;
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-52%);
}

.selection-back-btn:active {
    transform: translateY(-50%);
    box-shadow: none;
}

/* Review Mistakes Button Positioning */
#selection-review-mistakes {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    margin: 0 !important; /* Override inline style */
}

/* Progress Summary Card in Selection View */
.progress-summary-card {
    background: white;
    border-radius: 20px;
    padding: 24px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    border: 2px solid #F1F5F9;
    margin-bottom: 40px !important; /* Override inline style */
}

.summary-info h3 {
    margin: 0 0 8px 0;
    color: var(--primary-color);
    font-size: 1.4rem;
    font-weight: 800;
}

.summary-stats {
    display: flex;
    flex-direction: column;
    gap: 6px;
    color: var(--light-text);
    font-size: 1rem;
    font-weight: 600;
}

.summary-circle {
    width: 90px;
    height: 90px;
    border-radius: 50%;
    background: conic-gradient(var(--cta-color) 0%, #E2E8F0 0%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    color: var(--cta-color);
    font-size: 1.4rem;
    position: relative;
    box-shadow: 0 4px 10px rgba(0,0,0,0.05);
}

.summary-circle::before {
    content: '';
    position: absolute;
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: white;
}

.summary-circle span, .summary-circle div { /* The text inside */
    position: relative;
    z-index: 1;
}

/* Grid Layout */
.chapter-grid, .text-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
    gap: 24px;
    justify-content: center;
}

/* Card Styles */
.selection-card {
    background-color: white;
    border-radius: 20px;
    aspect-ratio: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    border: 2px solid transparent;
    position: relative;
    overflow: visible; /* Changed to visible for badge overlap if needed, though badge is inside */
}

.selection-card:hover {
    transform: translateY(-8px) rotate(1deg);
    box-shadow: 0 10px 25px rgba(79, 70, 229, 0.15);
    border-color: var(--primary-light);
}

.selection-card:active {
    transform: scale(0.95);
}

.selection-card.completed {
    background-color: #F0FDF4; /* Light green bg */
    border-color: #86EFAC;
}

.card-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary-color);
    line-height: 1;
    margin-bottom: 5px;
    text-shadow: 2px 2px 0 rgba(79, 70, 229, 0.1);
}

.card-label {
    font-size: 0.9rem;
    color: var(--light-text);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Badge Style */
.card-badge {
    position: absolute;
    top: -10px;
    right: -10px;
    background-color: var(--cta-color);
    color: white;
    font-size: 0.85rem;
    font-weight: 800;
    min-width: 28px;
    height: 28px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    z-index: 2;
    border: 3px solid white;
}

/* Special styling for "ALL" card */
.selection-card.all-card {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    box-shadow: 0 10px 20px rgba(79, 70, 229, 0.2);
}

.selection-card.all-card .card-number,
.selection-card.all-card .card-label {
    color: white;
    text-shadow: none;
}

.selection-card.all-card.completed {
    border: 4px solid #FCD34D; /* Gold border */
}

/* Responsive adjustments */
@media (max-width: 600px) {
    .chapter-grid, .text-grid {
        grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));
        gap: 16px;
    }
    
    .card-number {
        font-size: 2rem;
    }
    
    .card-label {
        font-size: 0.75rem;
    }
    
    .selection-back-btn span {
        display: none; /* Hide text on small screens, keep icon */
    }
    
    .selection-back-btn::before {
        content: '←';
        font-size: 1.2rem;
        font-weight: bold;
    }
    
    .selection-back-btn {
        padding: 8px 12px;
    }

    /* Stack header elements on mobile */
    .selection-header {
        flex-direction: column;
        gap: 15px;
        min-height: auto;
        margin-bottom: 25px;
    }
    
    .selection-back-btn {
        position: static;
        transform: none;
        align-self: flex-start;
        margin-bottom: -40px; /* Pull it up into the flow or overlap */
    }
    
    #selection-review-mistakes {
        position: static;
        transform: none;
        margin-top: 10px !important;
        width: 100%;
    }
    
    .progress-summary-card {
        flex-direction: column;
        text-align: center;
        gap: 20px;
        padding: 20px;
    }
    
    .summary-info {
        display: flex;
        flex-direction: column;
        align-items: center;
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    .selection-card {
        background-color: var(--surface-color);
        box-shadow: 0 4px 6px rgba(0,0,0,0.2);
    }
    
    .selection-card:hover {
        background-color: #334155;
        border-color: var(--primary-color);
    }
    
    .selection-card.completed {
        background-color: #064E3B; /* Dark green */
        border-color: #059669;
    }
    
    .card-number {
        color: var(--primary-light);
    }
    
    .card-label {
        color: var(--light-text);
    }
    
    .selection-back-btn {
        background-color: var(--surface-color);
        border-color: #334155;
        color: var(--light-text);
        box-shadow: 0 2px 0 #334155;
    }
    
    .selection-back-btn:hover {
        background-color: #334155;
        color: white;
    }
    
    .card-badge {
        border-color: var(--surface-color);
    }
    
    .progress-summary-card {
        background-color: var(--surface-color);
        border-color: #334155;
    }
    
    .summary-info h3 {
        color: var(--primary-light);
    }
    
    .summary-circle::before {
        background-color: var(--surface-color);
    }
    
    .summary-circle {
        background: conic-gradient(var(--cta-color) 0%, #334155 0%);
    }
}