.challenge-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

.challenge-header {
    margin-bottom: 20px;
}

.challenge-meta {
    margin-top: 10px;
}

.difficulty {
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 14px;
    font-weight: bold;
}

.difficulty.easy { background-color: #4CAF50; color: white; }
.difficulty.medium { background-color: #FFC107; color: black; }
.difficulty.hard { background-color: #F44336; color: white; }

.tag {
    background-color: #e0e0e0;
    padding: 4px 8px;
    border-radius: 4px;
    margin-right: 8px;
    font-size: 14px;
}

.solution-form {
    margin-top: 20px;
}

.solution-form textarea {
    width: 100%;
    padding: 10px;
    font-family: monospace;
    border: 1px solid #ccc;
    border-radius: 4px;
}

.submit-btn {
    margin-top: 10px;
    padding: 8px 16px;
    background-color: #2196F3;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

.previous-submissions {
    margin-top: 30px;
}

.submission {
    margin-bottom: 20px;
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: 4px;
}

.submission-time {
    color: #666;
    font-size: 14px;
}

.submission-code {
    margin: 10px 0;
    padding: 10px;
    background-color: #f5f5f5;
    border-radius: 4px;
    overflow-x: auto;
}

.submission-feedback {
    padding: 10px;
    background-color: #e3f2fd;
    border-radius: 4px;
}

/* Navigation */
.main-nav {
    background-color: #2c3e50;
    padding: 1rem 0;
    margin-bottom: 2rem;
}

.nav-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
}

.nav-brand {
    color: white;
    font-size: 1.5rem;
    text-decoration: none;
    font-weight: bold;
}

.nav-links a {
    color: white;
    text-decoration: none;
    margin-left: 20px;
}

/* Flash Messages */
.flash-message {
    padding: 1rem;
    margin: 1rem 0;
    border-radius: 4px;
    background-color: #e3f2fd;
    color: #1565c0;
    text-align: center;
}

/* Welcome Page */
.welcome-container {
    text-align: center;
    max-width: 800px;
    margin: 4rem auto;
    padding: 0 20px;
}

.welcome-text {
    font-size: 1.2rem;
    color: #666;
    margin: 2rem 0;
}

/* Auth Forms */
.auth-container {
    max-width: 400px;
    margin: 2rem auto;
    padding: 2rem;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.auth-form .form-group {
    margin-bottom: 1rem;
}

.auth-form label {
    display: block;
    margin-bottom: 0.5rem;
    color: #333;
}

.auth-form input {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid #ddd;
    border-radius: 4px;
}

.auth-link {
    text-align: center;
    margin-top: 1rem;
}

/* Dashboard */
.dashboard-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.challenges-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 2rem;
}

.challenge-card {
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    overflow: hidden;
}

.challenge-card.completed {
    border: 2px solid #4caf50;
}

.challenge-card-header {
    padding: 1rem;
    background-color: #f5f5f5;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.completion-badge {
    color: #4caf50;
    font-size: 1.2rem;
}

.evaluation-result {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 8px;
    margin: 20px 0;
    border: 1px solid #ddd;
}

.evaluation-section {
    margin: 15px 0;
}

.evaluation-section h4 {
    color: #2c3e50;
    margin: 10px 0;
}

.evaluation-section ul {
    margin: 10px 0;
    padding-left: 20px;
    list-style-type: disc;
}

.evaluation-section li {
    margin: 5px 0;
    line-height: 1.4;
}

.evaluation-section p {
    margin: 8px 0;
    line-height: 1.4;
}

.evaluation-results {
    margin-top: 30px;
    padding: 25px;
    background: white;
    border: 1px solid #e1e8ed;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.evaluation-results h3 {
    color: #2c3e50;
    margin-bottom: 20px;
    font-size: 1.4em;
}

.results-content {
    color: #2c3e50;
    line-height: 1.6;
}

/* Style markdown headings in results */
.results-content h2 {
    font-size: 1.2em;
    color: #2c3e50;
    margin: 25px 0 15px 0;
    padding-bottom: 8px;
    border-bottom: 1px solid #e1e8ed;
}

/* Style code blocks */
.results-content pre {
    background: #f8fafc;
    padding: 20px;
    border-radius: 8px;
    border: 1px solid #e1e8ed;
    overflow-x: auto;
    margin: 15px 0;
}

.results-content code {
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 14px;
    line-height: 1.5;
}

/* Style bullet points */
.results-content ul {
    margin: 15px 0;
    padding-left: 20px;
}

.results-content li {
    margin: 10px 0;
    line-height: 1.5;
}

/* Add some spacing between sections */
.results-content > * + * {
    margin-top: 15px;
}

.challenge-navigation {
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid #e1e8ed;
    text-align: right;
}

.next-challenge-btn {
    display: inline-flex;
    align-items: center;
    padding: 12px 24px;
    background-color: #3498db;
    color: white;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.next-challenge-btn:hover {
    background-color: #2980b9;
    transform: translateX(5px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

.next-arrow {
    margin-left: 8px;
    font-size: 1.2em;
}

/* Add some bottom margin to ensure there's space after the button */
.challenge-content {
    margin-bottom: 40px;
}

.code-textarea {
    width: 100%;
    min-height: 600px;
    padding: 20px;
    margin: 20px 0;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 14px;
    line-height: 1.5;
    border: 1px solid #e1e8ed;
    border-radius: 8px;
    resize: vertical;
    background: #f8fafc;
    color: #2c3e50;
    tab-size: 4;
}