/* ===================================
   Skills System Styles
   =================================== */

/* Skill Button Styles */
.skill-button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
}

.skill-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.skill-button:active {
    transform: translateY(0);
}

.skill-icon {
    font-size: 18px;
}

.skill-name {
    font-weight: 600;
}

/* Skill Panel Styles */
.skill-panel {
    position: fixed;
    right: 0;
    top: 80px;
    width: 500px;
    height: calc(100vh - 80px);
    background: white;
    box-shadow: -2px 0 8px rgba(0, 0, 0, 0.15);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    animation: slideInRight 0.3s ease;
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.skill-panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-bottom: 1px solid #ddd;
}

.skill-panel-header h2 {
    margin: 0;
    font-size: 20px;
    font-weight: 600;
}

.skill-panel-close {
    background: none;
    border: none;
    color: white;
    font-size: 28px;
    cursor: pointer;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.2s ease;
}

.skill-panel-close:hover {
    transform: scale(1.2);
}

.skill-panel-content {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
}

/* Skill Section Styles */
.skill-section {
    margin-bottom: 24px;
}

.skill-section h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 12px;
    color: #2d3436;
}

.skill-section p {
    font-size: 14px;
    line-height: 1.6;
    color: #636e72;
    margin: 0;
}

/* Skill Stats Styles */
.skill-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.stat-item {
    display: flex;
    flex-direction: column;
    padding: 12px;
    background: #f8f9fa;
    border-radius: 6px;
    border-left: 3px solid #667eea;
}

.stat-label {
    font-size: 12px;
    color: #636e72;
    margin-bottom: 4px;
}

.stat-value {
    font-size: 16px;
    font-weight: 600;
    color: #667eea;
}

/* Skill Tabs Styles */
.skill-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
    border-bottom: 2px solid #ddd;
}

.skill-tab-btn {
    padding: 12px 16px;
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    color: #636e72;
    transition: all 0.3s ease;
}

.skill-tab-btn:hover {
    color: #667eea;
}

.skill-tab-btn.active {
    color: #667eea;
    border-bottom-color: #667eea;
}

/* Skill Tab Content Styles */
.skill-tab-content {
    position: relative;
}

.skill-tab-pane {
    display: none;
    animation: fadeIn 0.3s ease;
}

.skill-tab-pane.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* Theory Content Styles */
.theory-content h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
}

.duration {
    font-size: 12px;
    color: #636e72;
    margin-bottom: 16px;
}

.theory-section {
    margin-bottom: 16px;
    padding-bottom: 16px;
    border-bottom: 1px solid #ddd;
}

.theory-section h4 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 8px;
    color: #2d3436;
}

.theory-section p {
    font-size: 13px;
    line-height: 1.6;
    color: #636e72;
    margin-bottom: 8px;
}

.formula {
    background: #f8f9fa;
    padding: 12px;
    border-radius: 6px;
    border-left: 3px solid #667eea;
    font-family: 'Courier New', monospace;
    font-size: 12px;
    overflow-x: auto;
    margin-top: 8px;
}

/* Visualizations Content Styles */
.visualizations-content {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.visualization-item {
    padding: 12px;
    background: #f8f9fa;
    border-radius: 6px;
    border-left: 3px solid #4facfe;
}

.visualization-item h4 {
    font-size: 14px;
    font-weight: 600;
    margin: 0 0 8px 0;
    color: #2d3436;
}

.visualization-item p {
    font-size: 12px;
    color: #636e72;
    margin: 0 0 8px 0;
}

.viz-launch-btn {
    padding: 6px 12px;
    background: #4facfe;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
    font-weight: 500;
    transition: all 0.2s ease;
}

.viz-launch-btn:hover {
    background: #3a9fd8;
    transform: translateX(2px);
}

/* Exercises Content Styles */
.exercises-content {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.exercise-group h4 {
    font-size: 14px;
    font-weight: 600;
    margin: 0 0 12px 0;
    color: #2d3436;
}

.exercise-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.exercise-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px;
    background: #f8f9fa;
    border-radius: 4px;
    border-left: 3px solid #fa709a;
}

.exercise-number {
    font-weight: 600;
    color: #667eea;
    min-width: 24px;
}

.exercise-question {
    flex: 1;
    font-size: 12px;
    color: #636e72;
}

.exercise-btn {
    padding: 4px 8px;
    background: #fa709a;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 11px;
    font-weight: 500;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.exercise-btn:hover {
    background: #e85a7f;
    transform: translateX(2px);
}

/* Applications Content Styles */
.applications-content {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.application-item {
    padding: 12px;
    background: #f8f9fa;
    border-radius: 6px;
    border-left: 3px solid #00f2fe;
}

.application-item h4 {
    font-size: 14px;
    font-weight: 600;
    margin: 0 0 8px 0;
    color: #2d3436;
}

.application-item p {
    font-size: 12px;
    color: #636e72;
    margin: 0 0 8px 0;
}

.difficulty-badge {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
    color: white;
}

.difficulty-basic {
    background: #27ae60;
}

.difficulty-intermediate {
    background: #f39c12;
}

.difficulty-advanced {
    background: #e74c3c;
}

/* Skill Browser Styles */
.skill-browser {
    padding: 20px;
}

.skill-browser-header {
    margin-bottom: 20px;
}

.skill-browser-header h2 {
    font-size: 24px;
    font-weight: 600;
    margin: 0;
    color: #2d3436;
}

.skill-browser-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 16px;
}

.skill-card {
    padding: 16px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

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

.skill-card-icon {
    font-size: 32px;
    margin-bottom: 12px;
}

.skill-card h3 {
    font-size: 16px;
    font-weight: 600;
    margin: 0 0 8px 0;
    color: #2d3436;
}

.skill-card p {
    font-size: 12px;
    color: #636e72;
    margin: 0 0 12px 0;
    flex: 1;
}

.skill-card-meta {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
    font-size: 11px;
}

.skill-type {
    background: #667eea;
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
}

.skill-domains {
    background: #f8f9fa;
    color: #636e72;
    padding: 4px 8px;
    border-radius: 4px;
}

.skill-card-btn {
    padding: 8px 12px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
    font-weight: 600;
    transition: all 0.2s ease;
}

.skill-card-btn:hover {
    transform: translateX(2px);
}

/* Responsive Design */
@media (max-width: 768px) {
    .skill-panel {
        width: 100%;
        right: -100%;
    }

    .skill-browser-grid {
        grid-template-columns: 1fr;
    }

    .skill-stats {
        grid-template-columns: 1fr;
    }
}

/* Skill Error Styles */
.skill-error {
    padding: 16px;
    background: #fadbd8;
    border-left: 3px solid #e74c3c;
    border-radius: 4px;
}

.skill-error h3 {
    color: #c0392b;
    margin: 0 0 8px 0;
}

.skill-error p {
    color: #a93226;
    margin: 0;
    font-size: 12px;
}

.error-details {
    font-family: 'Courier New', monospace;
    background: white;
    padding: 8px;
    border-radius: 4px;
    margin-top: 8px;
    font-size: 11px;
}