:root { --green: #1f6f4a; --red: #b3261e; --gray: #6b6b6b; font-family: system-ui, "Malgun Gothic", sans-serif; }
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; background: #f4f5f2; color: #1b1b1b; }
main { max-width: 480px; margin: 0 auto; padding: 16px; }
main.wide { max-width: 960px; }
h1 { font-size: 1.4rem; margin: 8px 0 16px; }
h2 { font-size: 1.1rem; margin: 28px 0 8px; }
h3 { font-size: 1rem; margin: 20px 0 6px; }
input, button { font: inherit; padding: 10px 12px; border-radius: 8px; border: 1px solid #c8c8c8; }
input { width: 100%; margin-bottom: 8px; background: #fff; }
textarea { width: 100%; font: inherit; font-size: .85rem; padding: 8px; border-radius: 8px; border: 1px solid #c8c8c8; margin-bottom: 8px; }
button { background: var(--green); color: #fff; border-color: var(--green); cursor: pointer; }
button.small { padding: 4px 10px; font-size: .9rem; }
button.big { width: 100%; padding: 28px; font-size: 1.6rem; border-radius: 16px; }
button.big.on { background: var(--red); border-color: var(--red); }
button.big.half { flex: 1; padding: 22px 8px; font-size: 1.3rem; }
button.big.off { background: #fff; color: var(--red); border: 2px solid var(--red); }
.timer { font-size: 3rem; font-weight: 700; text-align: center; margin: 0 0 16px; color: var(--gray); font-variant-numeric: tabular-nums; }
.center { text-align: center; margin-bottom: 0; }
.timer.on { color: var(--green); }
.row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.row input { width: auto; margin: 0; }
.row label { display: flex; gap: 6px; align-items: center; }
label.check { display: flex; gap: 8px; align-items: center; margin-bottom: 8px; }
label.check input { width: auto; margin: 0; }
.status { font-weight: 600; color: var(--gray); }
.status.on { color: var(--green); }
.hint, .muted { color: var(--gray); font-size: .9rem; }
.who { color: var(--gray); }
.code { font-size: 2.4rem; font-weight: 700; letter-spacing: .15em; display: flex; gap: 16px; align-items: baseline; }
.code small { font-size: .9rem; letter-spacing: 0; color: var(--gray); font-weight: 400; }
.code-box { background: #fff; border: 1px solid #c8c8c8; border-radius: 8px; padding: 8px 12px; margin-top: 8px; word-break: break-all; }
.error { color: var(--red); font-weight: 600; }
.ok { color: var(--green); font-weight: 600; }
ol.first { background: #fff; border: 2px solid var(--green); border-radius: 12px; padding: 12px 12px 12px 32px; margin: 0 0 16px; line-height: 1.6; }
ol.first li { display: list-item; padding: 2px 0; border: none; }
button.danger { background: #fff; color: var(--red); border-color: var(--red); }
button.link { background: none; border: none; color: var(--green); padding: 0; text-decoration: underline; font-weight: 600; }
ul { padding: 0; list-style: none; }
li { display: flex; justify-content: space-between; align-items: center; gap: 8px; padding: 8px 0; border-bottom: 1px solid #ddd; }
table { width: 100%; border-collapse: collapse; background: #fff; display: block; overflow-x: auto; }
td, th { padding: 6px 8px; border-bottom: 1px solid #e3e3e3; text-align: left; font-size: .9rem; white-space: nowrap; }
.good { color: var(--green); }
.bad { color: var(--red); }
tr.muted td { color: #aaa; }