:root {
  --bg: #f4f6fa;
  --card: #ffffff;
  --text: #17213a;
  --muted: #6b7690;
  --line: #e3e7ef;
  --brand: #035ea1;
  --ok: #1f8f55;
  --ok-bg: #e5f5ec;
  --bad: #c0392b;
  --bad-bg: #fbe9e7;
  --warn-bg: #fff4e0;
  --radius: 14px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1522;
    --card: #182133;
    --text: #e8ecf5;
    --muted: #93a0bb;
    --line: #26314a;
    --brand: #4aa3e8;
    --ok: #4cc386;
    --ok-bg: #173628;
    --bad: #ef6b5e;
    --bad-bg: #3a1d1b;
    --warn-bg: #3a2f17;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }
main { max-width: 980px; margin: 0 auto; padding: 16px; }
h1, h2, h3 { margin: 0 0 8px; line-height: 1.2; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.right { text-align: right; }
.nowrap { white-space: nowrap; }
.inline { display: inline; margin: 0; }

.top {
  display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  padding: 12px 16px; background: var(--card); border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 2;
}
.brand { font-weight: 700; font-size: 18px; color: var(--text); }
.top nav { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }

.btn, button.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px 16px; border-radius: 10px; border: 1px solid var(--brand);
  background: var(--brand); color: #fff; font: inherit; font-weight: 600; cursor: pointer;
  text-decoration: none;
}
.btn:hover { filter: brightness(1.08); text-decoration: none; }
.btn.ghost { background: transparent; color: var(--brand); }
.btn.danger { background: var(--bad); border-color: var(--bad); }
button.link { background: none; border: 0; color: var(--brand); font: inherit; cursor: pointer; padding: 0; }
.g-button { display: flex; justify-content: center; margin: 20px 0 12px; min-height: 44px; }

.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; margin-bottom: 16px; }
.card.narrow { max-width: 520px; margin-left: auto; margin-right: auto; }
.card.center { text-align: center; }
.card-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 12px; }
.card-head h3 { margin: 0; }
.actions { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }

.login { min-height: 80vh; display: grid; place-items: center; }
.login .card { width: 100%; max-width: 380px; padding: 32px 24px; }
.logo { font-size: 48px; }

.status {
  display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap;
  border-radius: var(--radius); padding: 18px 20px; margin-bottom: 16px; border: 1px solid var(--line);
}
.status.on { background: var(--ok-bg); border-color: var(--ok); }
.status.off { background: var(--card); }
.status .label { font-size: 14px; color: var(--muted); }
.status .big { font-size: 28px; font-weight: 700; }

.month-nav { display: flex; align-items: center; justify-content: space-between; margin: 8px 0 12px; }
.month-nav h2 { margin: 0; text-transform: capitalize; }
.month-nav .btn { padding: 6px 14px; font-size: 20px; }

.tiles { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 16px; }
.tile { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px; }
.tile.warn { background: var(--warn-bg); }
.tile .label { color: var(--muted); font-size: 13px; }
.tile .value { font-size: 22px; font-weight: 700; margin-top: 4px; }

table.visits { width: 100%; border-collapse: collapse; }
.visits th { text-align: left; font-size: 13px; color: var(--muted); font-weight: 600; padding: 8px; border-bottom: 1px solid var(--line); }
.visits td { padding: 10px 8px; border-bottom: 1px solid var(--line); vertical-align: middle; }
.visits tr.open td { background: var(--ok-bg); }
.visits tr.note td { border-top: 0; padding-top: 0; color: var(--muted); font-size: 14px; }
.tag { display: inline-block; font-size: 12px; padding: 1px 8px; border-radius: 99px; background: var(--line); color: var(--muted); }
.tag.live { background: var(--ok); color: #fff; }
.pill { border: 0; border-radius: 99px; padding: 4px 12px; font: inherit; font-size: 13px; cursor: pointer; }
.pill.paid { background: var(--ok-bg); color: var(--ok); }
.pill.unpaid { background: var(--warn-bg); color: #9a6200; }
.empty { color: var(--muted); text-align: center; padding: 24px 0; }

.events { list-style: none; margin: 0; padding: 0; }
.events li { padding: 8px 0; border-bottom: 1px solid var(--line); }
.events li:last-child { border-bottom: 0; }

.form { display: grid; gap: 14px; }
.form label { display: grid; gap: 6px; font-weight: 600; font-size: 14px; }
.form input {
  font: inherit; padding: 10px 12px; border-radius: 10px; border: 1px solid var(--line);
  background: var(--bg); color: var(--text);
}
.danger-zone { margin-top: 24px; padding-top: 16px; border-top: 1px solid var(--line); }
.alert { background: var(--bad-bg); color: var(--bad); padding: 10px 12px; border-radius: 10px; }
.ok { background: var(--ok-bg); color: var(--ok); padding: 10px 12px; border-radius: 10px; }
.howto { padding-left: 20px; }
.howto li { margin-bottom: 6px; }

@media (max-width: 720px) {
  .tiles { grid-template-columns: repeat(2, 1fr); }
  .status .big { font-size: 22px; }
  .visits thead { display: none; }
  .visits tr { display: grid; grid-template-columns: 1fr 1fr; padding: 8px 0; border-bottom: 1px solid var(--line); }
  .visits td { border: 0; padding: 4px 8px; }
  .visits td[data-label]::before { content: attr(data-label); display: block; font-size: 12px; color: var(--muted); }
  .visits tr.note { display: block; }
  .visits td.right { text-align: left; }
}