:root {
  --bg: #f6f7f9; --card: #fff; --fg: #1c2024; --muted: #6b7280; --border: #dfe3e8;
  --yes: #1f9d55; --no: #d64545; --missed: #b8bec7; --accent: #2563eb;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #14171a; --card: #1d2125; --fg: #e8eaed; --muted: #9aa3ad; --border: #2d333a; --missed: #4a525b; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.5 system-ui, sans-serif; }
header { display: flex; flex-wrap: wrap; gap: 1rem; align-items: center; justify-content: space-between;
  max-width: 60rem; margin: 0 auto; padding: 1rem; }
h1 { margin: 0; letter-spacing: .08em; }
h2 { margin-top: 0; } h2 small { color: var(--muted); font-weight: 400; font-size: .6em; margin-left: .5rem; }
nav { display: flex; gap: 1rem; align-items: center; } nav form { margin: 0; }
a, button.link { color: var(--accent); background: none; border: 0; font: inherit; cursor: pointer; padding: 0; }
main { max-width: 60rem; margin: 0 auto; padding: 0 1rem 2rem; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: .75rem; padding: 1.25rem; margin-bottom: 1rem; }
.flash { color: var(--no); font-weight: 600; }
.hint { color: var(--muted); font-size: .9rem; }
.login { max-width: 22rem; margin: 3rem auto; display: grid; gap: 1rem; }
label { display: grid; gap: .25rem; }
input { font: inherit; padding: .5rem; border: 1px solid var(--border); border-radius: .4rem; background: var(--bg); color: var(--fg); }
button { font: inherit; padding: .6rem 1.2rem; border: 0; border-radius: .4rem; background: var(--accent); color: #fff; cursor: pointer; }
.answer { display: flex; gap: 1rem; }
.answer button { flex: 1; font-size: 1.25rem; padding: 1rem; opacity: .55; }
.answer button.selected { opacity: 1; outline: 3px solid var(--fg); }
.answer .yes { background: var(--yes); } .answer .no { background: var(--no); }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(2.6rem, 1fr)); gap: .3rem; }
.cell { display: inline-block; text-align: center; padding: .25rem 0; border-radius: .3rem; font-size: .8rem; min-width: 2rem; }
.cell.yes { background: var(--yes); color: #fff; } .cell.no { background: var(--no); color: #fff; }
.cell.missed { background: var(--missed); color: #fff; }
.cell.future { border: 1px dashed var(--border); color: var(--muted); }
.cell.today { border: 2px solid var(--accent); } .cell.today-yes { background: var(--yes); color: #fff; outline: 2px solid var(--accent); }
.cell.today-no { background: var(--no); color: #fff; outline: 2px solid var(--accent); }
.legend { color: var(--muted); font-size: .85rem; } .legend .cell { margin-left: .75rem; }
.scroll { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; }
th, td { padding: .35rem .6rem; border-bottom: 1px solid var(--border); text-align: center; white-space: nowrap; }
tbody th { text-align: left; font-weight: 400; color: var(--muted); }
thead th { position: sticky; top: 0; background: var(--card); }
td.yes { color: var(--yes); font-weight: 700; } td.no { color: var(--no); font-weight: 700; } td.missed { color: var(--missed); }
.totals td, .totals th { font-weight: 700; }
.article { font-size: 1.1rem; line-height: 1.7; margin: 1rem 0 1.5rem; }
.section { margin: 1rem 0 0; color: var(--muted); font-size: .85rem; text-transform: uppercase; letter-spacing: .08em; }
.section + .article { margin-top: .25rem; }