/* Achievement Page Styles - Matching Main Page Design */
.achievement-container {
    background: radial-gradient(circle at top right, rgba(59, 130, 246, 0.18), transparent 45%), 
                radial-gradient(circle at 10% 80%, rgba(99, 102, 241, 0.15), transparent 55%), 
                var(--light-gray);
    min-height: 100vh;
    padding: 120px 0 80px;
    position: relative;
    overflow: hidden;
}

.achievement-container::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
               radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.08) 0%, transparent 50%);
    opacity: 0.6;
    pointer-events: none;
}

/* Page Header */
.achievement-header {
    margin-bottom: 60px;
    position: relative;
    z-index: 1;
}

.achievement-header .section-header h1 {
    font-size: 3rem;
    color: var(--text-color);
    margin-bottom: 20px;
    font-weight: 800;
    line-height: 1.2;
}

/* Controls Section */
.achievement-controls {
    margin-bottom: 40px;
    position: relative;
    z-index: 1;
}

.controls-card {
    background: var(--white);
    border-radius: 24px;
    padding: 40px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15), 0 4px 8px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.8);
    position: relative;
    overflow: hidden;
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
}

.controls-card::after {
    content: "";
    position: absolute;
    top: 4px;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at top left, rgba(37, 99, 235, 0.02), transparent 50%),
               radial-gradient(circle at bottom right, rgba(59, 130, 246, 0.02), transparent 50%);
    pointer-events: none;
}

.controls-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient);
}

.control-group {
    position: relative;
    padding: 24px;
    border-radius: 20px;
    background: linear-gradient(135deg, rgba(248, 250, 252, 0.6), rgba(255, 255, 255, 0.4));
    border: 1px solid rgba(37, 99, 235, 0.08);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.control-group:last-child {
    margin-bottom: 0;
}

.control-group::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, rgba(37, 99, 235, 0.2), transparent);
    border-radius: 20px 20px 0 0;
}

.control-label {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid rgba(37, 99, 235, 0.15);
    position: relative;
}

.control-label::after {
    content: "";
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 60px;
    height: 2px;
    background: var(--gradient);
    border-radius: 1px;
}

.control-label i {
    color: var(--primary-color);
    width: 20px;
    font-size: 1.2rem;
}

/* Exam Selection */
.control-select {
    width: 100%;
    max-width: 500px;
    height: 60px;
    padding: 0 24px;
    border: 2px solid rgba(37, 99, 235, 0.15);
    border-radius: 16px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.9), rgba(248, 250, 252, 0.8));
    font-size: 1.05rem;
    font-weight: 500;
    color: var(--text-color);
    transition: var(--transition);
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%232563eb' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 20px center;
    background-repeat: no-repeat;
    background-size: 20px;
    padding-right: 56px;
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.08);
}

.control-select:hover {
    border-color: rgba(37, 99, 235, 0.3);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.15);
    transform: translateY(-1px);
}

.control-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.15), 0 4px 12px rgba(37, 99, 235, 0.2);
    transform: translateY(-1px);
}

.control-select option {
    padding: 12px 16px;
    font-weight: 500;
    color: var(--text-color);
    background: var(--white);
}

/* Achievement Filters */
.achievement-filters {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 16px;
}

.filter-option {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 18px 20px;
    border: 2px solid rgba(37, 99, 235, 0.12);
    border-radius: 16px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(248, 250, 252, 0.9));
    cursor: pointer;
    transition: var(--transition);
    font-weight: 600;
    color: var(--text-color);
    justify-content: center;
    position: relative;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.06);
}

.filter-option::before {
    content: "";
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transition: left 0.5s ease;
}

.filter-option input {
    display: none;
}

.filter-option:hover {
    border-color: rgba(37, 99, 235, 0.4);
    transform: translateY(-3px);
    box-shadow: 0 12px 30px rgba(37, 99, 235, 0.18);
}

.filter-option:hover::before {
    left: 100%;
}

.filter-option.active,
.filter-option:has(input:checked) {
    border-color: var(--primary-color);
    background: var(--gradient);
    color: var(--white);
    transform: translateY(-3px);
    box-shadow: 0 12px 30px rgba(37, 99, 235, 0.35);
}

.filter-icon {
    font-size: 1.2rem;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.filter-icon.correct {
    color: #10b981;
}

.filter-icon.partial {
    color: #f59e0b;
}

.filter-icon.wrong {
    color: #ef4444;
}

.filter-option.active .filter-icon.correct,
.filter-option.active .filter-icon.partial,
.filter-option.active .filter-icon.wrong {
    color: var(--white);
}

.filter-text {
    font-size: 0.95rem;
    font-weight: 600;
}

/* Utility Buttons */
.utility-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 14px;
}

.btn-utility {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 18px;
    border: 2px solid rgba(37, 99, 235, 0.12);
    border-radius: 14px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(248, 250, 252, 0.9));
    color: var(--text-color);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    position: relative;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.06);
}

.btn-utility::before {
    content: "";
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s ease;
}

.btn-utility:hover {
    border-color: var(--primary-color);
    background: var(--gradient);
    color: var(--white);
    transform: translateY(-3px);
    box-shadow: 0 12px 30px rgba(37, 99, 235, 0.25);
}

.btn-utility:hover::before {
    left: 100%;
}

.btn-utility.danger {
    border-color: rgba(239, 68, 68, 0.2);
    color: #ef4444;
}

.btn-utility.danger:hover {
    border-color: #ef4444;
    background: linear-gradient(135deg, #ef4444, #dc2626);
    color: var(--white);
    box-shadow: 0 12px 30px rgba(239, 68, 68, 0.3);
}

.btn-utility i {
    font-size: 1.1rem;
    width: 18px;
}

.btn-utility.on {
    border-color: var(--primary-color);
    background: var(--gradient);
    color: var(--white);
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.25);
}

/* Questions Section */
.achievement-questions {
    position: relative;
    z-index: 1;
}

/* Question Cards */
.questionArea {
    background: var(--white);
    border-radius: 20px;
    padding: 32px;
    margin-bottom: 24px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.8);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.questionArea::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
}

.questionArea:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
}

.questionTxtArea {
    margin-bottom: 24px;
}

.questionTxtArea strong {
    display: inline-block;
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 16px;
    padding: 8px 16px;
    background: rgba(37, 99, 235, 0.1);
    border-radius: 12px;
}

.questionTxtArea pre {
    font-family: "Pretendard", -apple-system, BlinkMacSystemFont, system-ui, Roboto, sans-serif;
    font-size: 1.1rem;
    line-height: 1.7;
    color: var(--text-color);
    white-space: pre-wrap;
    word-wrap: break-word;
    margin: 0;
    padding: 20px;
    background: var(--light-gray);
    border-radius: 12px;
    border-left: 4px solid var(--primary-color);
}

/* Answer Section */
.explanationTxtArea {
    margin-bottom: 24px;
    padding: 24px;
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.05), rgba(16, 185, 129, 0.02));
    border-radius: 16px;
    border: 1px solid rgba(16, 185, 129, 0.1);
    position: relative;
}

.explanationTxtArea::before {
    content: "정답";
    position: absolute;
    top: -12px;
    left: 20px;
    background: #10b981;
    color: var(--white);
    padding: 4px 12px;
    border-radius: 8px;
    font-size: 0.8rem;
    font-weight: 600;
}

.explanationTxtArea pre {
    font-family: "Pretendard", -apple-system, BlinkMacSystemFont, system-ui, Roboto, sans-serif;
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-color);
    white-space: pre-wrap;
    word-wrap: break-word;
    margin: 0;
}

.explanationTxtArea.blind {
    display: none;
}

.explanationImgArea {
    margin-bottom: 24px;
    text-align: center;
}

.explanationImgArea img {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.explanationImgArea.blind {
    display: none;
}

/* Button Area */
.explanationBtnArea {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    padding-top: 24px;
    border-top: 1px solid rgba(0, 0, 0, 0.05);
}

.btnArea {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.btnArea .btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    border: 2px solid rgba(37, 99, 235, 0.1);
    border-radius: 10px;
    background: var(--white);
    color: var(--text-color);
    font-weight: 500;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.btnArea .btn:hover {
    border-color: var(--primary-color);
    background: var(--primary-color);
    color: var(--white);
    transform: translateY(-1px);
}

.btnArea .btn.on {
    border-color: var(--primary-color);
    background: var(--primary-color);
    color: var(--white);
}

.btnArea .btn.yellow {
    border-color: #f59e0b;
    background: #f59e0b;
    color: var(--white);
}

.btnArea .btn.yellow:hover {
    background: #d97706;
    border-color: #d97706;
}

/* Achievement Buttons */
.achievement {
    display: flex;
    gap: 8px;
}

.achievement .btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid rgba(0, 0, 0, 0.1);
    border-radius: 50%;
    background: var(--white);
    cursor: pointer;
    transition: var(--transition);
    padding: 0;
}

.achievement .btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.achievement .btn img {
    width: 20px;
    height: 20px;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .controls-card {
        padding: 32px;
        gap: 32px;
    }
    
    .achievement-filters {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .utility-buttons {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .achievement-container {
        padding: 100px 0 60px;
    }
    
    .controls-card {
        padding: 24px;
        gap: 28px;
        border-radius: 20px;
    }
    
    .control-group {
        padding: 20px;
        border-radius: 16px;
    }
    
    .control-label {
        font-size: 1rem;
        margin-bottom: 16px;
    }
    
    .control-select {
        height: 56px;
        font-size: 1rem;
        max-width: 100%;
    }
    
    .achievement-filters {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .filter-option {
        padding: 16px 18px;
        font-size: 0.95rem;
        justify-content: flex-start;
    }
    
    .utility-buttons {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .btn-utility {
        padding: 14px 16px;
        font-size: 0.9rem;
    }
    
    .questionArea {
        padding: 20px;
        border-radius: 16px;
    }
    
    .questionTxtArea strong {
        font-size: 1.1rem;
    }
    
    .questionTxtArea pre {
        font-size: 1rem;
        padding: 16px;
    }
    
    .explanationBtnArea {
        flex-direction: column;
        align-items: stretch;
        gap: 12px;
    }
    
    .btnArea {
        justify-content: center;
    }
    
    .achievement {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .achievement-container {
        padding: 90px 0 50px;
    }
    
    .achievement-header .section-header h1 {
        font-size: 2.2rem;
    }
    
    .controls-card {
        padding: 20px;
        gap: 24px;
        border-radius: 16px;
    }
    
    .control-group {
        padding: 16px;
        border-radius: 14px;
    }
    
    .control-label {
        font-size: 0.95rem;
        gap: 8px;
    }
    
    .control-select {
        height: 52px;
        font-size: 0.95rem;
        padding: 0 20px;
        padding-right: 50px;
    }
    
    .filter-option {
        padding: 14px 16px;
        font-size: 0.9rem;
        gap: 10px;
    }
    
    .filter-icon {
        font-size: 1.1rem;
    }
    
    .btn-utility {
        padding: 12px 14px;
        font-size: 0.85rem;
        gap: 8px;
    }
    
    .btn-utility i {
        font-size: 1rem;
        width: 16px;
    }
    
    .questionArea {
        padding: 16px;
        margin-bottom: 20px;
    }
    
    .questionTxtArea strong {
        font-size: 1rem;
        padding: 6px 12px;
    }
    
    .questionTxtArea pre {
        font-size: 0.95rem;
        padding: 14px;
        line-height: 1.6;
    }
}

/* Loading Animation */
.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 60px 20px;
    color: var(--dark-gray);
    font-size: 1.1rem;
}

.loading::before {
    content: "";
    width: 20px;
    height: 20px;
    border: 2px solid rgba(37, 99, 235, 0.2);
    border-top: 2px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-right: 12px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 80px 20px;
    color: var(--dark-gray);
}

.empty-state i {
    font-size: 4rem;
    color: rgba(37, 99, 235, 0.3);
    margin-bottom: 24px;
}

.empty-state h3 {
    font-size: 1.5rem;
    color: var(--text-color);
    margin-bottom: 12px;
}

.empty-state p {
    font-size: 1rem;
    line-height: 1.6;
}