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

/* Page layout */
html, body {
    height: 100%;
}

body {
    display: flex;
    flex-direction: column;
    min-height: 100vh;

    font-family: Arial, Helvetica, sans-serif;
    background: #0f1115;
    color: #e0e0e0;
}

/* Header */
header {
    padding: 20px;
    background: #161a22;
    border-bottom: 1px solid #2a2f3a;
}

/* Navigation */
nav a {
    margin-right: 15px;
    color: #8ab4f8;
    text-decoration: none;
}

nav a:hover {
    text-decoration: underline;
}

/* Main content */
main {
    flex: 1; /* 🔑 ключевая строка */
    padding: 30px;
    max-width: 1000px;
    margin: 0 auto;
}

/* Footer */
footer {
    padding: 15px;
    background: #161a22;
    border-top: 1px solid #2a2f3a;
    text-align: center;
    font-size: 0.9em;
    color: #9aa0a6;
}