/**
 * GURO AI Coding Features Styling
 * Modern, clean interface for coding education features
 */

.coding-features {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 90%;
    max-width: 1200px;
    max-height: 90vh;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    z-index: 10000;
    overflow-y: auto;
    padding: 30px;
    color: #fff;
}

.coding-features.hidden {
    display: none;
}

.coding-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
    padding-bottom: 15px;
    border-bottom: 2px solid rgba(255, 255, 255, 0.1);
}

.coding-header h2 {
    font-size: 28px;
    margin: 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.close-btn {
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: #fff;
    font-size: 30px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s;
}

.close-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: rotate(90deg);
}

.coding-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 25px;
    flex-wrap: wrap;
}

.tab-btn {
    flex: 1;
    min-width: 180px;
    padding: 12px 20px;
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid rgba(255, 255, 255, 0.1);
    color: #fff;
    border-radius: 10px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s;
}

.tab-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.3);
}

.tab-btn.active {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-color: #667eea;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.language-selector {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 25px;
    padding: 15px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
}

.language-selector label {
    font-weight: 600;
    font-size: 14px;
}

#language-select {
    flex: 1;
    max-width: 300px;
    padding: 10px 15px;
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(255, 255, 255, 0.2);
    color: #fff;
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
}

#language-select option {
    background: #1a1a2e;
    color: #fff;
}

.coding-tab {
    display: none;
}

.coding-tab.active {
    display: block;
}

.coding-section {
    background: rgba(255, 255, 255, 0.05);
    padding: 25px;
    border-radius: 12px;
    margin-bottom: 25px;
}

.coding-section h3 {
    margin-top: 0;
    margin-bottom: 15px;
    font-size: 18px;
    color: #667eea;
}

.code-input, .error-input {
    width: 100%;
    min-height: 200px;
    padding: 15px;
    background: #0f0f1e;
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: #fff;
    font-family: 'Courier New', monospace;
    font-size: 14px;
    resize: vertical;
    margin-bottom: 15px;
}

.error-input {
    min-height: 100px;
}

#exercise-topic, #examples-topic {
    width: 100%;
    padding: 12px 15px;
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    color: #fff;
    font-size: 14px;
    margin-bottom: 15px;
}

#exercise-difficulty {
    width: 100%;
    padding: 12px 15px;
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    color: #fff;
    font-size: 14px;
    margin-bottom: 15px;
    cursor: pointer;
}

.primary-btn {
    padding: 12px 30px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    border-radius: 8px;
    color: #fff;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.primary-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.4);
}

.result-section {
    margin-top: 25px;
}

.loading {
    padding: 30px;
    text-align: center;
    font-size: 18px;
    color: #667eea;
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.error {
    padding: 20px;
    background: rgba(255, 59, 48, 0.1);
    border: 2px solid rgba(255, 59, 48, 0.3);
    border-radius: 8px;
    color: #ff3b30;
}

.explanation-result, .exercise-result, .debug-result, .examples-result {
    background: rgba(255, 255, 255, 0.05);
    padding: 25px;
    border-radius: 12px;
}

.explanation-result h3, .exercise-result h3, .exercise-result h4,
.debug-result h3, .debug-result h4, .examples-result h3, .examples-result h4 {
    color: #667eea;
    margin-top: 20px;
    margin-bottom: 15px;
}

.line-by-line {
    background: #0f0f1e;
    border-radius: 8px;
    padding: 15px;
}

.code-line {
    display: flex;
    margin-bottom: 15px;
    padding-bottom: 15px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.code-line:last-child {
    border-bottom: none;
}

.line-number {
    min-width: 40px;
    color: #667eea;
    font-weight: bold;
    font-family: 'Courier New', monospace;
}

.line-content {
    flex: 1;
}

.line-content code {
    display: block;
    background: rgba(102, 126, 234, 0.1);
    padding: 8px 12px;
    border-radius: 6px;
    margin-bottom: 8px;
    font-family: 'Courier New', monospace;
    color: #88d8ff;
}

.line-content .explanation {
    color: rgba(255, 255, 255, 0.8);
    font-size: 14px;
    margin: 0;
}

.key-concepts, .pitfalls, .prevention-tips {
    list-style: none;
    padding: 0;
}

.key-concepts li, .pitfalls li, .prevention-tips li {
    padding: 10px 15px;
    margin-bottom: 8px;
    background: rgba(102, 126, 234, 0.1);
    border-left: 4px solid #667eea;
    border-radius: 6px;
}

.pitfalls li {
    background: rgba(255, 149, 0, 0.1);
    border-left-color: #ff9500;
}

.difficulty-badge {
    display: inline-block;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: bold;
    text-transform: uppercase;
    margin-left: 10px;
}

.difficulty-badge.beginner {
    background: #4cd964;
    color: #fff;
}

.difficulty-badge.intermediate {
    background: #ff9500;
    color: #fff;
}

.difficulty-badge.advanced {
    background: #ff3b30;
    color: #fff;
}

pre {
    background: #0f0f1e;
    padding: 15px;
    border-radius: 8px;
    overflow-x: auto;
}

pre code {
    color: #88d8ff;
    font-family: 'Courier New', monospace;
    font-size: 14px;
}

.copy-btn {
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 6px;
    color: #fff;
    font-size: 14px;
    cursor: pointer;
    margin-top: 10px;
    transition: all 0.3s;
}

.copy-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.4);
}

.hints {
    list-style: none;
    padding: 0;
}

.hints li {
    padding: 12px 15px;
    margin-bottom: 10px;
    background: rgba(255, 204, 0, 0.1);
    border-left: 4px solid #ffcc00;
    border-radius: 6px;
}

.test-cases {
    display: grid;
    gap: 15px;
}

.test-case {
    padding: 15px;
    background: rgba(76, 217, 100, 0.1);
    border-radius: 8px;
    border: 2px solid rgba(76, 217, 100, 0.3);
}

.test-case code {
    background: rgba(0, 0, 0, 0.3);
    padding: 4px 8px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
}

.solution-section {
    margin-top: 25px;
    padding: 15px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
}

.solution-section summary {
    cursor: pointer;
    font-weight: bold;
    padding: 10px;
    color: #667eea;
}

.solution-section summary:hover {
    color: #88d8ff;
}

.error-type {
    padding: 15px;
    background: rgba(255, 59, 48, 0.1);
    border-left: 4px solid #ff3b30;
    border-radius: 6px;
    margin-bottom: 20px;
}

.line-info {
    color: #ff9500;
    margin-left: 10px;
    font-style: italic;
}

.example-level {
    padding: 20px;
    margin-bottom: 25px;
    border-radius: 12px;
    border: 2px solid;
}

.example-level.beginner {
    background: rgba(76, 217, 100, 0.05);
    border-color: #4cd964;
}

.example-level.intermediate {
    background: rgba(255, 149, 0, 0.05);
    border-color: #ff9500;
}

.example-level.advanced {
    background: rgba(255, 59, 48, 0.05);
    border-color: #ff3b30;
}

.output {
    margin-top: 10px;
    padding: 10px 15px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 6px;
    font-family: 'Courier New', monospace;
}

.practice-exercises {
    display: grid;
    gap: 15px;
}

.practice-item {
    padding: 15px;
    background: rgba(102, 126, 234, 0.1);
    border-radius: 8px;
    border-left: 4px solid #667eea;
}

.practice-item em {
    color: #ffcc00;
}

/* Responsive Design */
@media (max-width: 768px) {
    .coding-features {
        width: 95%;
        padding: 20px;
    }
    
    .coding-tabs {
        flex-direction: column;
    }
    
    .tab-btn {
        min-width: 100%;
    }
    
    .coding-header h2 {
        font-size: 22px;
    }
}