/* --- الألوان الأساسية --- */
:root {
    --background-dark: #0D1117; 
    --primary-text: #E6EDF3;    
    --cyan-accent: #00BFFF;      
    --cyan-hover: #61DAFB;      
    --border-color: #30363D;    
}

/* --- تنسيق عام للصفحة --- */
body {
    background-color: var(--background-dark);
    color: var(--primary-text);
    font-family: 'Cairo', sans-serif;
    min-height: 100vh; 
    margin: 0;
    padding: 20px;
    box-sizing: border-box; 
    display: flex;
    flex-direction: column;
}

.main-container {
    max-width: 700px;
    width: 100%;
    padding: 20px;
    margin: 40px auto; 
    text-align: center;
    flex-grow: 1;
}

h1 {
    font-size: 2.5rem; 
    color: var(--primary-text);
}

p {
    font-size: 1.1rem;
    color: #8B949E; 
    margin-bottom: 40px;
}

.controls {
    display: flex;
    justify-content: center;
    gap: 15px; 
    align-items: center;
    flex-wrap: wrap; 
    margin-bottom: 40px;
}

select, input[type="number"] {
    background-color: var(--background-dark);
    color: var(--primary-text);
    border: 1px solid var(--border-color);
    padding: 10px 15px;
    border-radius: 6px;
    font-size: 1rem;
    font-family: 'Cairo', sans-serif;
}

input[type="number"] {
    width: 60px;
    text-align: center;
}

button {
    background-color: var(--cyan-accent);
    color: var(--background-dark);
    border: none;
    padding: 11px 30px;
    font-size: 1.2rem;
    font-weight: bold;
    font-family: 'Cairo', sans-serif;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.3s ease; 
}

button:hover {
    background-color: var(--cyan-hover);
}

.result-container {
    margin-top: 40px;
    padding: 20px;
    border: 1px dashed var(--border-color);
    border-radius: 8px;
    text-align: right; 
    background-color: #010409;
    white-space: pre-wrap;   
    word-break: break-word;
    font-family: 'Cairo', sans-serif;
    font-size: 1rem;
}

.hidden {
    display: none;
}

footer {
    text-align: center;
    padding: 20px 0;
    color: #8B949E;
    font-size: 0.9rem;
    margin-top: auto;
}

footer a {
    color: var(--primary-text);
    text-decoration: none;
    transition: color 0.3s ease;
}

footer a:hover {
    color: var(--cyan-accent);
}