*, *::before, *::after{
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}
html, body{
    background: var(--bg);
    color: var(--text);
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    min-height: 100dvh;
}
header span{
    color: var(--combat);
}
:root{
    --bg: #0a0a0a;
    --card: #141414;
    --border: #222;
    --text: #e8e8e8;
    --text-dim: #888;
    --accent: #4FC3F7;
    --combat: #C62828;
}
header{
    position: fixed;
    width: 100%;
    height: 52px;
    background-color: var(--bg);
    border-bottom: 1px solid var(--border);
    z-index: 100;
    font-size: 18px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    top: 0;
    letter-spacing: 1px;
}

nav{
    position: fixed;
    width: 100%;
    height: 64px;
    background-color: var(--card);
    border-top: 1px solid var(--border);
    z-index: 100;
    display: flex;
    bottom: 0;
    padding-bottom: env(safe-area-inset-bottom)
}
nav button{
    flex: 1;
    background: none;
    border: none;
    color: #555;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    cursor: pointer;
}
main{
    padding-top: 60px;
    padding-bottom: 80px;
    max-width: 520px;
    margin: 0 auto;
    padding-left: 12px;
    padding-right: 12px;
}