/* Dark Theme Variables */
:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --border-color: #30363d;
    --text-primary: #f0f6fc;
    --text-secondary: #8b949e;
    --text-muted: #7d8590;
    --accent-primary: #238636;
    --accent-secondary: #1f6feb;
    --accent-danger: #da3633;
    --accent-warning: #fb8500;
    --gradient-primary: linear-gradient(135deg, #1f6feb 0%, #238636 100%);
}

/* Base Styles */
body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    min-height: 100vh;
}

/* Global text color overrides */
h1, h2, h3, h4, h5, h6 {
    color: var(--text-primary) !important;
}

p, li, div, span, label, small {
    color: var(--text-primary) !important;
}

strong, b {
    color: #58a6ff !important;
    font-weight: 600;
}

.text-muted, .text-secondary {
    color: var(--text-secondary) !important;
}

small, .small {
    color: var(--text-muted) !important;
}

/* Navigation */
.navbar {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Progress Bar */
.progress-container {
    background: var(--bg-secondary);
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
}

.progress {
    background-color: var(--bg-tertiary);
    border-radius: 10px;
    height: 8px;
}

.progress-bar {
    background: var(--gradient-primary);
    border-radius: 10px;
    transition: width 0.6s ease;
}

.progress-text {
    color: var(--text-secondary) !important;
    font-weight: 500;
}

/* Lesson Card */
.lesson-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.lesson-card .card-header {
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
    border-radius: 12px 12px 0 0;
}

.lesson-card .card-footer {
    background: var(--bg-tertiary);
    border-top: 1px solid var(--border-color);
    border-radius: 0 0 12px 12px;
}

/* Card and content overrides */
.card, .card-body, .card-header, .card-footer {
    color: var(--text-primary) !important;
}

.card-header h4, .card-header h5, .card-header h6 {
    color: var(--text-primary) !important;
}

.lesson-timer {
    color: var(--text-secondary) !important;
    font-family: 'Courier New', monospace;
}

.navbar-text {
    color: var(--text-primary) !important;
}

.progress-text {
    color: var(--text-secondary) !important;
    font-weight: 500;
}

/* Modal text colors */
.modal-body h1, .modal-body h2, .modal-body h3, .modal-body h4, .modal-body h5, .modal-body h6,
.modal-body p, .modal-body div, .modal-body span {
    color: var(--text-primary) !important;
}

.modal-header h5 {
    color: white !important;
}

.stat-box h4 {
    color: var(--accent-primary) !important;
    margin: 0;
}

.stat-box small {
    color: var(--text-secondary) !important;
}

/* Content Styles */
.step-content h1, .step-content h2, .step-content h3, .step-content h4, .step-content h5, .step-content h6 {
    color: var(--text-primary) !important;
    margin-bottom: 1rem;
}

.step-content p, .step-content li, .step-content div {
    color: var(--text-primary) !important;
    line-height: 1.6;
}

.step-content p {
    margin-bottom: 1rem;
}

.step-content strong {
    color: #58a6ff !important;
    font-weight: 600;
}

.step-content small {
    color: var(--text-secondary) !important;
}

.text-muted {
    color: var(--text-muted) !important;
}

.highlight-box {
    background: linear-gradient(135deg, rgba(31, 111, 235, 0.15) 0%, rgba(35, 134, 54, 0.15) 100%);
    border: 1px solid var(--accent-secondary);
    border-radius: 8px;
    padding: 1.5rem;
    margin: 1rem 0;
}

.highlight-box h1, .highlight-box h2, .highlight-box h3, .highlight-box h4, .highlight-box h5, .highlight-box h6 {
    color: #79c0ff !important;
    margin-bottom: 1rem;
}

.highlight-box p, .highlight-box li, .highlight-box div, .highlight-box span {
    color: var(--text-primary) !important;
}

.highlight-box strong {
    color: #58a6ff !important;
}

.danger-box {
    background: rgba(218, 54, 51, 0.15);
    border: 1px solid var(--accent-danger);
    border-radius: 8px;
    padding: 1.5rem;
    margin: 1rem 0;
}

.danger-box h1, .danger-box h2, .danger-box h3, .danger-box h4, .danger-box h5, .danger-box h6 {
    color: #ffa198 !important;
    margin-bottom: 1rem;
}

.danger-box p, .danger-box li, .danger-box div, .danger-box span {
    color: var(--text-primary) !important;
}

.danger-box strong {
    color: #ff7b72 !important;
}

.success-box {
    background: rgba(35, 134, 54, 0.15);
    border: 1px solid var(--accent-primary);
    border-radius: 8px;
    padding: 1.5rem;
    margin: 1rem 0;
}

.success-box h1, .success-box h2, .success-box h3, .success-box h4, .success-box h5, .success-box h6 {
    color: #7ee787 !important;
    margin-bottom: 1rem;
}

.success-box p, .success-box li, .success-box div, .success-box span {
    color: var(--text-primary) !important;
}

.success-box strong {
    color: #56d364 !important;
}

/* Quiz Styles */
.quiz-container {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    margin: 1.5rem 0;
}

.quiz-header h5, .quiz-header h6 {
    color: var(--accent-secondary) !important;
    margin-bottom: 1rem;
}

.quiz-option {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
    margin: 0.5rem 0;
    cursor: pointer;
    transition: all 0.3s ease;
    color: var(--text-primary) !important;
}

.quiz-option strong {
    color: #58a6ff !important;
}

.quiz-option:hover {
    border-color: var(--accent-secondary);
    background: var(--bg-tertiary);
}

.quiz-option.selected {
    border-color: var(--accent-secondary);
    background: rgba(31, 111, 235, 0.1);
}

.quiz-option.correct {
    border-color: var(--accent-primary);
    background: rgba(35, 134, 54, 0.2);
}

.quiz-option.incorrect {
    border-color: var(--accent-danger);
    background: rgba(218, 54, 51, 0.2);
}

.hint-box {
    background: rgba(251, 133, 0, 0.15);
    border: 1px solid var(--accent-warning);
    border-radius: 6px;
    padding: 1rem;
    color: var(--text-primary) !important;
}

/* Code Editor */
.code-editor-container {
    margin: 1.5rem 0;
}

.code-editor-header {
    background: var(--bg-tertiary);
    padding: 0.75rem 1rem;
    border-radius: 8px 8px 0 0;
    border: 1px solid var(--border-color);
    border-bottom: none;
}

.code-editor-header h6, .code-editor-header small {
    color: var(--text-primary) !important;
}

.code-editor {
    height: 300px;
    border: 1px solid var(--border-color);
    border-radius: 0 0 8px 8px;
}

.code-output {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 1rem;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    color: var(--text-primary) !important;
}

.code-output.success {
    border-color: var(--accent-primary);
    background: rgba(35, 134, 54, 0.15);
    color: #7ee787 !important;
}

.code-output.error {
    border-color: var(--accent-danger);
    background: rgba(218, 54, 51, 0.15);
    color: #ffa198 !important;
}

/* Achievement Badge */
.achievement-badge {
    background: var(--gradient-primary);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
    animation: bounceIn 0.8s ease;
}

@keyframes bounceIn {
    0% { transform: scale(0.3); opacity: 0; }
    50% { transform: scale(1.05); }
    70% { transform: scale(0.9); }
    100% { transform: scale(1); opacity: 1; }
}

/* Modal Styles */
.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
}

.stat-box {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
    margin: 0.5rem;
}

.stat-box h4 {
    color: var(--accent-primary);
    margin: 0;
}

/* Button Styles */
.btn-primary {
    background: var(--gradient-primary);
    border: none;
    border-radius: 8px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(31, 111, 235, 0.3);
}

.btn-outline-secondary {
    border-color: var(--border-color);
    color: var(--text-secondary);
    border-radius: 8px;
}

.btn-outline-secondary:hover {
    background: var(--bg-tertiary);
    border-color: var(--text-secondary);
    color: var(--text-primary);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }
    
    .lesson-card {
        margin: 0 0.5rem;
    }
    
    .code-editor {
        height: 250px;
    }
}

/* Interactive Elements */
.interactive-demo {
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    margin: 1rem 0;
}

.interactive-demo h5, .interactive-demo h6, .interactive-demo p, .interactive-demo div, .interactive-demo label {
    color: var(--text-primary) !important;
}

.interactive-demo small {
    color: var(--text-secondary) !important;
}

.api-endpoint {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 0.5rem 1rem;
    font-family: 'Courier New', monospace;
    color: var(--accent-secondary) !important;
    margin: 0.5rem 0;
}

.vulnerability-highlight {
    background: rgba(218, 54, 51, 0.25);
    border-radius: 4px;
    padding: 0 0.25rem;
    color: #ffa198 !important;
    font-weight: bold;
}

/* Alert and feedback styles */
.alert {
    color: var(--text-primary) !important;
}

.alert h6, .alert strong {
    color: inherit !important;
}

.alert-info {
    background-color: rgba(31, 111, 235, 0.15);
    border-color: var(--accent-secondary);
    color: #79c0ff !important;
}

.alert-danger {
    background-color: rgba(218, 54, 51, 0.15);
    border-color: var(--accent-danger);
    color: #ffa198 !important;
}

.alert-success {
    background-color: rgba(35, 134, 54, 0.15);
    border-color: var(--accent-primary);
    color: #7ee787 !important;
}

.alert-warning {
    background-color: rgba(251, 133, 0, 0.15);
    border-color: var(--accent-warning);
    color: #f2cc60 !important;
}

/* Loading Animation */
.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid var(--border-color);
    border-radius: 50%;
    border-top-color: var(--accent-primary);
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { 
        transform: rotate(360deg); 
    }
}