/* =======================
   UTC2 Exercises Page Styles
   Modern, Professional, Responsive
   ======================= */

/* Only apply Poppins to specific exercises content, not body/menu */
.exercises-main-container,
.exercises-control-bar,
.exercises-card,
.exercises-panel {
    font-family: 'Poppins', Arial, sans-serif;
}

/* Active menu item highlight */
.nav-links a.active,
.menu__child a.active {
    color: #20b2aa !important;
    font-weight: 700;
    position: relative;
}

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 3px;
    background: #20b2aa;
    border-radius: 2px;
}

/* Control Bar Section */
.exercises-control-bar {
    background: #f8f9fa;
    padding: 30px 20px;
    border-bottom: 1px solid #e0e0e0;
    margin-top: 20px;
}

.exercises-control-wrapper {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.exercises-search-box {
    position: relative;
    max-width: 600px;
    width: 100%;
}

.exercises-search-box i {
    position: absolute;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    color: #666;
    font-size: 1.1rem;
}

.exercises-search-input {
    width: 100%;
    padding: 15px 20px 15px 50px;
    border: 2px solid #e0e0e0;
    border-radius: 30px;
    font-size: 1rem;
    font-family: 'Poppins', Arial, sans-serif;
    transition: all 0.3s ease;
    outline: none;
}

.exercises-search-input:focus {
    border-color: #20b2aa;
    box-shadow: 0 0 0 3px rgba(32, 178, 170, 0.1);
}

.exercises-filters {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
    align-items: center;
}

.exercises-filter-select {
    padding: 12px 20px;
    border: 2px solid #e0e0e0;
    border-radius: 25px;
    font-size: 1rem;
    font-family: 'Poppins', Arial, sans-serif;
    background: #fff;
    color: #333;
    cursor: pointer;
    transition: all 0.3s ease;
    outline: none;
    min-width: 150px;
}

.exercises-filter-select:hover {
    border-color: #20b2aa;
}

.exercises-filter-select:focus {
    border-color: #20b2aa;
    box-shadow: 0 0 0 3px rgba(32, 178, 170, 0.1);
}

.exercises-random-btn {
    padding: 12px 25px;
    background: linear-gradient(135deg, #20b2aa 0%, #1f767a 100%);
    color: #fff;
    border: none;
    border-radius: 25px;
    font-size: 1rem;
    font-family: 'Poppins', Arial, sans-serif;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.exercises-random-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

.exercises-random-btn:active {
    transform: translateY(0);
}

/* Main Container */
.exercises-main-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 40px 20px;
}

.exercises-content-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

/* Exercise Cards Grid */
.exercises-cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 25px;
}

.exercises-card {
    background: #fff;
    border-radius: 15px;
    padding: 25px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    cursor: pointer;
    border: 2px solid transparent;
}

.exercises-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.15);
    border-color: #20b2aa;
}

.exercises-card.active {
    border-color: #20b2aa;
    background: #f0fffe;
}

.exercises-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 15px;
}

.exercises-card-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: #1d2a57;
    margin: 0;
    flex: 1;
}

.exercises-card-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 10px;
}

.exercises-tag {
    padding: 5px 12px;
    border-radius: 15px;
    font-size: 0.85rem;
    font-weight: 500;
    display: inline-block;
}

.exercises-tag-skill {
    background: #e3f2fd;
    color: #1976d2;
}

.exercises-tag-level {
    background: #fff3e0;
    color: #f57c00;
}

.exercises-card-description {
    color: #666;
    font-size: 0.95rem;
    line-height: 1.6;
    margin: 15px 0;
}

.exercises-card-meta {
    display: flex;
    gap: 20px;
    margin-top: 15px;
    font-size: 0.9rem;
    color: #888;
}

.exercises-card-meta-item {
    display: flex;
    align-items: center;
    gap: 5px;
}

.exercises-card-meta-item i {
    font-size: 0.9rem;
}

.exercises-card-btn {
    margin-top: 15px;
    padding: 10px 20px;
    background: linear-gradient(135deg, #20b2aa 0%, #1f767a 100%);
    color: #fff;
    border: none;
    border-radius: 20px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    width: 100%;
    transition: all 0.3s ease;
}

.exercises-card-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

/* Exercise Panel */
.exercises-panel {
    background: #fff;
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    max-height: 800px;
    overflow-y: auto;
    position: sticky;
    top: 20px;
}

.exercises-panel-placeholder {
    text-align: center;
    padding: 60px 20px;
    color: #999;
}

.exercises-panel-placeholder i {
    font-size: 4rem;
    color: #ddd;
    margin-bottom: 20px;
}

.exercises-panel-placeholder p {
    font-size: 1.1rem;
    color: #999;
}

.exercises-panel-header {
    margin-bottom: 25px;
    padding-bottom: 20px;
    border-bottom: 2px solid #e0e0e0;
}

.exercises-panel-title {
    font-size: 1.8rem;
    font-weight: 700;
    color: #1d2a57;
    margin-bottom: 10px;
}

.exercises-panel-info {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.exercises-panel-info-item {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 0.9rem;
    color: #666;
}

/* Questions */
.exercises-questions-list {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.exercises-question-item {
    padding: 20px;
    background: #f8f9fa;
    border-radius: 10px;
    border: 2px solid transparent;
    transition: all 0.3s ease;
}

.exercises-question-item.correct {
    background: #e8f5e9;
    border-color: #4caf50;
}

.exercises-question-item.incorrect {
    background: #ffebee;
    border-color: #f44336;
}

.exercises-question-text {
    font-size: 1.1rem;
    font-weight: 600;
    color: #1d2a57;
    margin-bottom: 15px;
}

.exercises-options-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.exercises-option-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: #fff;
    border-radius: 8px;
    border: 2px solid #e0e0e0;
    cursor: pointer;
    transition: all 0.3s ease;
}

.exercises-option-item:hover {
    border-color: #20b2aa;
    background: #f0fffe;
}

.exercises-option-item input[type="radio"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: #20b2aa;
}

.exercises-option-item label {
    flex: 1;
    cursor: pointer;
    color: #333;
    font-size: 1rem;
}

.exercises-option-item.correct-answer {
    background: #e8f5e9;
    border-color: #4caf50;
    color: #2e7d32;
}

.exercises-option-item.wrong-answer {
    background: #ffebee;
    border-color: #f44336;
    color: #c62828;
}

.exercises-option-item.disabled {
    pointer-events: none;
    opacity: 0.7;
}

/* Reading Passage */
.exercises-reading-passage {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 20px;
    border-left: 4px solid #20b2aa;
}

.exercises-reading-passage p {
    line-height: 1.8;
    color: #333;
    font-size: 1rem;
}

/* Panel Actions */
.exercises-panel-actions {
    display: flex;
    gap: 15px;
    margin-top: 30px;
    padding-top: 20px;
    border-top: 2px solid #e0e0e0;
}

.exercises-panel-btn {
    flex: 1;
    padding: 15px 25px;
    border: none;
    border-radius: 25px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: 'Poppins', Arial, sans-serif;
}

.exercises-panel-btn-submit {
    background: linear-gradient(135deg, #20b2aa 0%, #1f767a 100%);
    color: #fff;
}

.exercises-panel-btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.exercises-panel-btn-reset {
    background: #fff;
    color: #20b2aa;
    border: 2px solid #20b2aa;
}

.exercises-panel-btn-reset:hover {
    background: #f0fffe;
}

/* Results */
.exercises-results {
    background: linear-gradient(135deg, #e3f2fd 0%, #f0fffe 100%);
    padding: 30px;
    border-radius: 15px;
    margin-bottom: 25px;
    text-align: center;
}

.exercises-results-score {
    font-size: 3rem;
    font-weight: 700;
    color: #1d2a57;
    margin-bottom: 10px;
}

.exercises-results-text {
    font-size: 1.2rem;
    color: #666;
    margin-bottom: 15px;
}

.exercises-results-message {
    font-size: 1.1rem;
    font-weight: 600;
    color: #20b2aa;
    padding: 15px;
    background: #fff;
    border-radius: 10px;
    margin-top: 15px;
}

.exercises-results-message.high {
    color: #4caf50;
}

.exercises-results-message.medium {
    color: #ff9800;
}

.exercises-results-message.low {
    color: #f44336;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .exercises-content-wrapper {
        grid-template-columns: 1fr;
    }

    .exercises-panel {
        position: static;
        max-height: none;
    }

}

@media (max-width: 768px) {
    .exercises-control-bar {
        padding: 20px 15px;
    }

    .exercises-filters {
        flex-direction: column;
        align-items: stretch;
    }

    .exercises-filter-select {
        width: 100%;
    }

    .exercises-random-btn {
        width: 100%;
        justify-content: center;
    }

    .exercises-cards-grid {
        grid-template-columns: 1fr;
    }

    .exercises-main-container {
        padding: 20px 15px;
    }

    .exercises-panel {
        padding: 20px 15px;
    }

    .exercises-panel-actions {
        flex-direction: column;
    }

    .exercises-results-score {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .exercises-card {
        padding: 20px;
    }

    .exercises-card-title {
        font-size: 1.1rem;
    }
}