/* Reset e Variáveis CSS */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Cores Primárias */
    --bg-primary: #1e1e1e;
    --bg-secondary: #252526;
    --bg-tertiary: #2d2d30;
    --accent-blue: #007acc;
    --accent-green: #4ec9b0;
    --accent-success: #4CAF50;
    
    /* Cores Secundárias */
    --text-primary: #f8f8f2;
    --text-secondary: #cccccc;
    --text-muted: #969696;
    --error-color: #ff6b6b;
    --warning-color: #ffd93d;
    
    /* Fontes */
    --font-ui: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-code: 'Fira Code', 'Consolas', monospace;
    
    /* Espaçamentos */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    
    /* Bordas */
    --border-radius: 8px;
    --border-color: #3e3e42;
    
    /* Sombras */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.2);
}

/* Base Styles */
body {
    font-family: var(--font-ui);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow: hidden;
}

/* App Container */
.app-container {
    height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 60px;
    flex-shrink: 0;
}

.header-left {
    display: flex;
    align-items: center;
}

/* Efeito hover geral para todos os h1 */
h1 {
    transition: all 0.3s ease;
    cursor: pointer;
}

h1:hover {
    transform: translateY(-2px);
    text-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    color: var(--accent-color);
}

.logo {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--accent-blue);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    position: relative;
    cursor: pointer;
    transition: all 0.3s ease;
}

.logo:hover {
    transform: translateY(-2px) scale(1.02);
    color: var(--accent-color);
    text-shadow: 0 4px 12px rgba(74, 144, 226, 0.3);
}

.logo::after {
    content: "v.1.5";
    position: absolute;
    top: 50%;
    right: -45px;
    transform: translateY(-50%);
    font-size: 0.75rem;
    font-weight: 400;
    color: var(--text-muted);
    background-color: var(--bg-tertiary);
    padding: 2px 6px;
    border-radius: 4px;
    opacity: 0;
    transition: opacity 0.3s ease, transform 0.3s ease;
    pointer-events: none;
    white-space: nowrap;
}

.logo:hover::after {
    opacity: 1;
    transform: translateY(-50%) translateX(5px);
}

.logo i {
    width: 24px;
    height: 24px;
}

.header-right {
    display: flex;
    gap: var(--spacing-sm);
}

.header-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-family: var(--font-ui);
    font-size: 0.875rem;
    transition: all 0.2s ease;
    text-decoration: none;
}

.header-btn:hover {
    background-color: var(--bg-tertiary);
    border-color: var(--accent-blue);
    color: var(--text-primary);
}

/* Main Content */
.main-content {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* Sidebar */
.sidebar {
    width: 300px;
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

.sidebar-header {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.sidebar-header h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.progress-overview {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.progress-bar {
    width: 100%;
    height: 6px;
    background-color: var(--bg-tertiary);
    border-radius: 3px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background-color: var(--accent-green);
    transition: width 0.3s ease;
    width: 0%;
}

.progress-text {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.exercises-list {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-sm);
}

/* Exercise Items */
.exercise-category {
    margin-bottom: var(--spacing-md);
}

.category-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    cursor: pointer;
    border-radius: var(--border-radius);
    transition: background-color 0.2s ease;
}

.category-header:hover {
    background-color: var(--bg-tertiary);
}

.category-title {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.category-exercises {
    margin-left: var(--spacing-md);
    margin-top: var(--spacing-xs);
}

.exercise-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    cursor: pointer;
    border-radius: var(--border-radius);
    transition: all 0.2s ease;
    margin-bottom: var(--spacing-xs);
}

.exercise-item:hover {
    background-color: var(--bg-tertiary);
}

.exercise-item.active {
    background-color: var(--accent-blue);
    color: white;
}

.exercise-item.completed {
    background-color: rgba(78, 201, 176, 0.1);
    border-left: 3px solid var(--accent-green);
}

.exercise-status {
    width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.exercise-info {
    flex: 1;
}

.exercise-name {
    font-size: 0.875rem;
    font-weight: 400;
    line-height: 1.4;
}

.exercise-difficulty {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Content Area */
.content-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Exercise Panel */
.exercise-panel {
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-md);
    flex-shrink: 0;
}

.exercise-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-md);
}

.exercise-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.exercise-meta {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

.difficulty-badge {
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
}

.difficulty-badge.beginner {
    background-color: rgba(76, 175, 80, 0.2);
    color: var(--accent-success);
}

.difficulty-badge.intermediate {
    background-color: rgba(255, 193, 7, 0.2);
    color: var(--warning-color);
}

.difficulty-badge.advanced {
    background-color: rgba(244, 67, 54, 0.2);
    color: var(--error-color);
}

.time-estimate {
    font-size: 0.75rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.exercise-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.exercise-content {
    max-height: 200px;
    overflow-y: auto;
}

.exercise-description {
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
    color: var(--text-secondary);
}

.exercise-objectives {
    background-color: var(--bg-secondary);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    border-left: 4px solid var(--accent-blue);
}

.exercise-objectives h4 {
    margin-bottom: var(--spacing-sm);
    color: var(--accent-blue);
    font-size: 0.875rem;
    font-weight: 600;
}

.exercise-objectives ul {
    list-style: none;
    padding-left: 0;
}

.exercise-objectives li {
    padding: var(--spacing-xs) 0;
    position: relative;
    padding-left: var(--spacing-md);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.exercise-objectives li::before {
    content: "•";
    color: var(--accent-blue);
    position: absolute;
    left: 0;
}

/* Code and Terminal Area */
.code-terminal-area {
    flex: 1;
    display: flex;
    overflow: hidden;
}

.code-editor-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--border-color);
}

.terminal-section {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.editor-header,
.terminal-header {
    background-color: var(--bg-secondary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 48px;
    flex-shrink: 0;
}

.editor-header h3,
.terminal-header h3 {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.editor-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.editor-container {
    flex: 1;
    overflow: hidden;
}

#monaco-editor {
    width: 100%;
    height: 100%;
}

/* Terminal */
.terminal-container {
    flex: 1;
    background-color: #0c0c0c;
    color: #00ff00;
    font-family: var(--font-code);
    font-size: 14px;
    padding: var(--spacing-md);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}

#terminal-output {
    flex: 1;
    white-space: pre-wrap;
    word-wrap: break-word;
    margin-bottom: var(--spacing-md);
}

.terminal-input-line {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: auto;
}

.terminal-prompt {
    color: #00ff00;
    font-weight: bold;
}

#terminal-input {
    flex: 1;
    background: transparent;
    border: none;
    color: #00ff00;
    font-family: var(--font-code);
    font-size: 14px;
    outline: none;
}

#terminal-input::placeholder {
    color: #666;
}

.terminal-line {
    margin-bottom: var(--spacing-xs);
}

.terminal-error {
    color: #ff6b6b;
}

.terminal-success {
    color: #4ec9b0;
}

.terminal-info {
    color: #007acc;
}

/* Action Buttons */
.action-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-family: var(--font-ui);
    font-size: 0.875rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    transition: all 0.2s ease;
    text-decoration: none;
}

.action-btn.primary {
    background-color: var(--accent-blue);
    color: white;
}

.action-btn.primary:hover {
    background-color: #005a9e;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.action-btn.secondary {
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.action-btn.secondary:hover {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    border-color: var(--accent-blue);
}

.action-btn.success {
    background-color: var(--accent-success);
    color: white;
}

.action-btn.success:hover {
    background-color: #45a049;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.action-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

/* Modals */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    animation: fadeIn 0.2s ease;
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background-color: var(--bg-secondary);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    animation: slideIn 0.3s ease;
}

.modal-header {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-size: 1.1rem;
    font-weight: 600;
}

.close-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.close-btn:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: var(--spacing-md);
}

.modal-actions {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: flex-end;
    margin-top: var(--spacing-md);
}

/* Loading Screen */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading-content {
    text-align: center;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--bg-tertiary);
    border-top: 3px solid var(--accent-blue);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-md);
}

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

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

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Validation Results */
.validation-success {
    color: var(--accent-success);
    background-color: rgba(76, 175, 80, 0.1);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    border-left: 4px solid var(--accent-success);
}

.validation-error {
    color: var(--error-color);
    background-color: rgba(255, 107, 107, 0.1);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    border-left: 4px solid var(--error-color);
}

.validation-feedback {
    margin-top: var(--spacing-sm);
    font-size: 0.875rem;
    line-height: 1.5;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .sidebar {
        width: 250px;
    }
    
    .code-terminal-area {
        flex-direction: column;
    }
    
    .code-editor-section {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
}

@media (max-width: 768px) {
    .main-content {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        height: 200px;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    
    .exercise-panel {
        padding: var(--spacing-sm);
    }
    
    .exercise-header {
        flex-direction: column;
        gap: var(--spacing-sm);
        align-items: flex-start;
    }
    
    .header-btn {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: 0.75rem;
    }
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}