:root { color-scheme: light; font-family: system-ui, sans-serif; background: #f5f5f4; color: #1c1917; }
* { box-sizing: border-box; }
body { margin: 0; }
main { min-height: 100vh; display: grid; place-items: center; padding: 1rem; }
.card { width: min(100%, 24rem); position: relative; padding: 2rem; background: #fff; border: 1px solid #e7e5e4; border-radius: 1rem; box-shadow: 0 1rem 3rem #1c191714; }
h1 { margin: 0 0 .5rem; }
.muted { color: #78716c; }
label { display: block; margin: 1.5rem 0 .5rem; font-weight: 600; }
input, button { width: 100%; min-height: 2.75rem; border-radius: .6rem; font: inherit; }
input { padding: 0 .8rem; border: 1px solid #a8a29e; }
button { margin-top: 1rem; border: 0; background: #1c1917; color: #fff; font-weight: 700; cursor: pointer; }
button:disabled { opacity: .55; cursor: wait; }
#logout { position: absolute; top: 1rem; right: 1rem; color: #57534e; font-size: .875rem; }
#time { display: block; margin-top: 1.5rem; font: 700 1.6rem ui-monospace, monospace; text-align: center; }
#remaining { text-align: center; }
#error { min-height: 1.5rem; color: #b91c1c; }