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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: #f7f8fa;
    color: #222;
    line-height: 1.5;
}

h1, h2, h3 {
    font-weight: 650;
    color: #202124;
}

a {
    color: #2878e5;
    text-decoration: none;
}

button {
    font-family: inherit;
    border: none;
    cursor: pointer;
    background: #202124;
    color: white;
    padding: 12px 18px;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    transition: background 0.2s, transform 0.2s;
}

button:hover {
    background: #3b3b3b;
}

input {
    width: 100%;
    padding: 13px 14px;
    border: 1px solid #dedede;
    border-radius: 10px;
    font-size: 14px;
    font-family: inherit;
    outline: none;
}

input:focus {
    border-color: #2878e5;
    box-shadow: 0 0 0 3px rgba(40, 120, 229, 0.1);
}

@media (max-width: 600px) {
    body {
        font-size: 14px;
    }
}