* { box-sizing: border-box; }
body { margin: 0; padding: 24px; color: #202124; background: #f4f5f7; font: 16px/1.5 Arial, sans-serif; }
main { max-width: 900px; margin: auto; }
header, section { margin: 0 0 20px; padding: 20px; border: 1px solid #d7d9de; border-radius: 8px; background: #fff; }
h1, h2, h3 { margin-top: 0; }
form { display: grid; gap: 12px; }
label { display: grid; gap: 5px; }
input, select, button { max-width: 100%; padding: 9px; font: inherit; }
button { width: fit-content; cursor: pointer; }
button:disabled { cursor: not-allowed; opacity: .5; }
.row, nav { display: flex; align-items: center; justify-content: space-between; gap: 10px; flex-wrap: wrap; }
.slots { display: flex; gap: 8px; flex-wrap: wrap; }
.slots button.selected { outline: 3px solid #333; }
.card { padding: 12px 0; border-bottom: 1px solid #ddd; }
#notice { position: sticky; top: 0; z-index: 2; padding: 10px; background: #fff2c7; }
#notice:empty { display: none; }
small { color: #555; }