* {
    box-sizing: border-box;
    font-family: system-ui, -apple-system, sans-serif;
}

body {
    margin: 0;
    background: radial-gradient(circle at top, #111, #000);
    color: #fff;
}

header {
    padding: 16px;
    text-align: center;
    border-bottom: 1px solid #222;
}

header span {
    color: orange;
}

main {
    max-width: 900px;
    margin: auto;
    padding: 20px;
    display: grid;
    gap: 12px;
}

input,
textarea,
select,
button {
    padding: 10px;
    border-radius: 10px;
    border: 1px solid #333;
    background: #111;
    color: #fff;
}

button {
    background: orange;
    border: none;
    color: #000;
    font-weight: 700;
    cursor: pointer;
}

button:hover {
    filter: brightness(1.1);
}

#viewer {
    background: #050505;
    border: 1px solid #333;
    border-radius: 20px;
    padding: 10px;
    text-align: center;
    min-height: 300px;
}

#viewer img {
    max-width: 100%;
    max-height: 500px;
}