:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --success-color: #27ae60;
    --danger-color: #e74c3c;
    --light-color: #ecf0f1;
    --dark-color: #34495e;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f7fa;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

header {
    text-align: center;
    margin-bottom: 30px;
    padding: 20px;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

h1 {
    color: var(--primary-color);
    margin-bottom: 10px;
}

.description {
    color: var(--dark-color);
    max-width: 800px;
    margin: 0 auto;
}

.app-container {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 30px;
}

.panel {
    flex: 1;
    min-width: 300px;
    background-color: white;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--light-color);
}

h2 {
    color: var(--primary-color);
}

.btn {
    padding: 8px 16px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-primary {
    background-color: var(--secondary-color);
    color: white;
}

.btn-primary:hover {
    background-color: #2980b9;
}

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

.btn-success:hover {
    background-color: #219955;
}

textarea {
    width: 100%;
    height: 300px;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 14px;
    resize: vertical;
}

.result {
    margin-top: 15px;
    padding: 12px;
    background-color: var(--light-color);
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    white-space: pre-wrap;
    word-break: break-all;
    min-height: 50px;
}

.examples {
    background-color: white;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.examples h2 {
    margin-bottom: 15px;
}

.example-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 15px;
}

.example-btn {
    background-color: var(--light-color);
    color: var(--dark-color);
    border: 1px solid #ddd;
}

.example-btn:hover {
    background-color: #d5dbdb;
}

.example-code {
    background-color: var(--light-color);
    padding: 15px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    white-space: pre-wrap;
    overflow-x: auto;
}

.unit-doc {
    margin-top: 12px;
}

footer {
    text-align: center;
    margin-top: 30px;
    padding: 20px;
    color: var(--dark-color);
    font-size: 14px;
}

@media (max-width: 768px) {
    .app-container {
        flex-direction: column;
    }
}