/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
    padding: 20px;
    max-width: 1200px;
    margin: 0 auto;
}

/* Main heading */
h1 {
    color: #2c3e50;
    margin-bottom: -10px;
    padding-bottom: 3px;
    border-bottom: 3px solid #3498db;
    font-size: 2.2em;
}

h2 {
    color: #34495e;
    margin: 30px 0 20px 0;
    font-size: 1.5em;
}

h3 {
    color: #34495e;
    margin: 25px 0 15px 0;
    font-size: 1.3em;
}

/* Links and buttons */
a {
    color: #3498db;
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 5px;
    transition: background-color 0.3s ease;
}

a:hover {
    background-color: #e3f2fd;
    text-decoration: none;
}

/* Primary action link (Submit New Problem) */
a[href="/problem/new"] {
    background-color: #3498db;
    color: white;
    font-weight: 600;
    margin-bottom: 30px;
    display: inline-block;
    padding: 12px 24px;
    border-radius: 8px;
}

a[href="/problem/new"]:hover {
    background-color: #2980b9;
}

/* Problem list */
ul {
    list-style: none;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    padding: 25px;
    margin: 20px 0;
}

li {
    padding: 15px 0;
    border-bottom: 1px solid #eee;
}

li:last-child {
    border-bottom: none;
}

li a {
    display: block;
    padding: 12px 20px;
    margin: -12px -20px;
    border-radius: 6px;
    font-size: 1.1em;
}

li a:hover {
    background-color: #f8f9fa;
    transform: translateX(5px);
    transition: all 0.2s ease;
}

/* Problem page specific styles */
.problem-header {
    display: flex;
    align-items: center;
    margin-bottom: 30px;
    gap: 20px;
}

.back-btn {
    background-color: #95a5a6;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: background-color 0.3s ease;
}

.back-btn:hover {
    background-color: #7f8c8d;
}

.problem-desc {
    background: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin-bottom: 30px;
    font-size: 1.1em;
    line-height: 1.7;
}

/* Editor section */
.editor-section {
    background: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin-bottom: 30px;
}

#editor {
    border: 2px solid #ddd;
    border-radius: 8px;
    margin: 20px 0;
    height: 400px;
    overflow: hidden;
}

.editor-actions {
    margin-top: 20px;
    text-align: right;
}

form button[type="submit"] {
    background-color: #27ae60;
    color: white;
    border: none;
    padding: 12px 30px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    transition: background-color 0.3s ease;
}

form button[type="submit"]:hover {
    background-color: #229954;
}

/* Results section */
b {
    color: #2c3e50;
    display: inline-block;
    margin: 10px 0 5px 0;
}

pre {
    background-color: #f4f4f4;
    padding: 20px;
    border-radius: 6px;
    border-left: 4px solid #3498db;
    margin: 10px 0 20px 0;
    overflow-x: auto;
    font-family: 'JetBrains Mono', 'Courier New', monospace;
    font-size: 14px;
    line-height: 1.4;
}

pre[style*="color:red"] {
    border-left-color: #e74c3c;
    background-color: #fdf2f2;
}

/* Status messages */
p[style*="color:green"] {
    background-color: #d4edda;
    color: #155724;
    padding: 15px 20px;
    border-radius: 6px;
    border-left: 4px solid #27ae60;
    margin: 20px 0;
    font-weight: 600;
}

p[style*="color:red"] {
    background-color: #f8d7da;
    color: #721c24;
    padding: 15px 20px;
    border-radius: 6px;
    border-left: 4px solid #e74c3c;
    margin: 20px 0;
    font-weight: 600;
}

/* Back to Problems link */
a[href="/"] {
    display: inline-block;
    margin-top: 30px;
    background-color: #6c757d;
    color: white;
    padding: 10px 20px;
    border-radius: 6px;
    font-weight: 500;
}

a[href="/"]:hover {
    background-color: #5a6268;
}

/* Responsive design */
@media (max-width: 768px) {
    body {
        padding: 15px;
    }
    
    .problem-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    
    h1 {
        font-size: 1.8em;
    }
    
    .problem-desc, .editor-section, ul {
        padding: 20px;
    }
    
    #editor {
        height: 300px;
    }
    
    .editor-actions {
        text-align: center;
    }
}