:root {
  color-scheme: light dark;
  --primary: #00695c;
  --primary-text: #ffffff;
  --link: #00695c;
  --bg: #f2f4f3;
  --card: #ffffff;
  --text: #1b2421;
  --muted: #5f6c68;
  --line: #dde3e0;
  --hover: #f5f8f7;
  --bad: #c62828;
  --bad-bg: #fdecea;
  --warn: #8a5300;
  --warn-bg: #fff4e0;
  --tag-bg: #e9eeec;
}
@media (prefers-color-scheme: dark) {
  :root {
    --primary: #26a69a;
    --primary-text: #06221e;
    --link: #4db6ac;
    --bg: #121615;
    --card: #1c2220;
    --text: #e6ecea;
    --muted: #9aa8a4;
    --line: #2f3734;
    --hover: #232a28;
    --bad: #ef9a9a;
    --bad-bg: #3a1f1f;
    --warn: #ffcc80;
    --warn-bg: #3a2c14;
    --tag-bg: #2a312f;
  }
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.4 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
body.panel-open { overflow: hidden; }
h1 { font-size: 24px; margin: 8px 0 16px; }
h2 { font-size: 18px; margin: 0 0 8px; }
h3 { font-size: 15px; margin: 0 0 10px; color: var(--muted); }
a { color: var(--link); }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.n { text-align: right; font-variant-numeric: tabular-nums; }
.c { text-align: center; }
.nowrap { white-space: nowrap; }
.bad-text { color: var(--bad); font-weight: 600; }
.offscreen { position: fixed; left: -9999px; }

input, select, textarea, button, .button { font: inherit; color: inherit; }
input:not([type=checkbox]), select, textarea {
  width: 100%;
  min-height: 42px;
  padding: 8px 10px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
}
input[aria-invalid=true] { border-color: var(--bad); }
input:focus-visible, select:focus-visible, textarea:focus-visible, button:focus-visible, a:focus-visible, summary:focus-visible {
  outline: 2px solid var(--link);
  outline-offset: 1px;
}
input[type=checkbox] { width: 22px; height: 22px; accent-color: var(--primary); vertical-align: middle; }
textarea { resize: vertical; }
button, .button {
  display: inline-block;
  min-height: 42px;
  padding: 9px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--card);
  color: var(--link);
  text-decoration: none;
  text-align: center;
  cursor: pointer;
}
button:hover, .button:hover { background: var(--hover); }
button.primary { background: var(--primary); border-color: var(--primary); color: var(--primary-text); font-weight: 600; }
button.primary:hover { filter: brightness(1.08); background: var(--primary); }
.link-button { min-height: 0; padding: 4px 6px; border: 0; background: none; }
.link-button.danger { color: var(--bad); }

.bar {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  background: #00695c;
  color: #fff;
}
.bar a { color: #fff; text-decoration: none; }
.brand { font-size: 20px; font-weight: 700; }
.content { max-width: 1040px; margin: 0 auto; padding: 16px; }

.summary { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin-bottom: 16px; }
.stat { background: var(--card); border-radius: 10px; padding: 14px 16px; }
.stat-label { color: var(--muted); font-size: 14px; }
.stat-value { font-size: 26px; font-weight: 700; font-variant-numeric: tabular-nums; }
.stat-value.debt { color: var(--bad); }
.stat-note { color: var(--muted); font-size: 13px; }

.years { display: flex; gap: 6px; overflow-x: auto; margin-bottom: 12px; padding-bottom: 2px; }
.year { min-height: 36px; padding: 5px 14px; }
.year.active { background: var(--primary); border-color: var(--primary); color: var(--primary-text); font-weight: 600; }

table { width: 100%; border-collapse: collapse; }
.months { background: var(--card); border-radius: 10px; overflow: hidden; }
.months th, .months td { padding: 10px 12px; border-bottom: 1px solid var(--line); }
.months tbody tr:last-child td { border-bottom: 0; }
.months th { font-size: 13px; font-weight: 600; color: var(--muted); text-align: left; }
.months th.n { text-align: right; }
.months th.c { text-align: center; }
.row { cursor: pointer; }
.row:hover { background: var(--hover); }
.row.empty { color: var(--muted); }
.month-name { color: inherit; font-weight: 600; text-decoration: none; }
.total { font-weight: 700; white-space: nowrap; }
.tags { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 4px; }
.tag { padding: 1px 7px; border-radius: 10px; font-size: 12px; background: var(--tag-bg); color: var(--muted); }
.tag.warn { background: var(--warn-bg); color: var(--warn); }
.tag.bad { background: var(--bad-bg); color: var(--bad); }
.paid-box { display: inline-flex; align-items: center; gap: 6px; padding: 6px; cursor: pointer; }

.export { margin-top: 16px; background: var(--card); border-radius: 10px; padding: 14px 16px; }
.export-row { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.export-row label { display: flex; align-items: center; gap: 6px; }
.export-row select { width: auto; }

.overlay { position: fixed; inset: 0; z-index: 9; background: rgba(0, 0, 0, .35); }
.panel {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  z-index: 10;
  width: min(520px, 100%);
  overflow-y: auto;
  background: var(--bg);
  padding: 0 16px 32px;
}
.panel-head {
  position: sticky;
  top: 0;
  z-index: 1;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 0 -16px 12px;
  padding: 12px 16px;
  background: #00695c;
  color: #fff;
}
.panel-head h2 { margin: 0; }
.close { color: #fff; font-size: 20px; text-decoration: none; padding: 2px 8px; }
.block { background: var(--card); border-radius: 10px; padding: 14px; margin-bottom: 10px; }
.field { display: block; margin-bottom: 10px; font-size: 14px; color: var(--muted); }
.field input, .field textarea, .field select { margin-top: 4px; color: var(--text); font-size: 16px; }
.check { display: flex; gap: 8px; align-items: center; font-size: 14px; }
.paste { margin-bottom: 12px; }
details { margin-top: 10px; }
summary { cursor: pointer; color: var(--link); font-size: 14px; padding: 4px 0; }

.message { margin: 0 0 8px; padding: 8px 12px; border-radius: 8px; font-size: 14px; }
.message.bad { background: var(--bad-bg); color: var(--bad); }
.message.warn { background: var(--warn-bg); color: var(--warn); }

.meter-head, .meter { display: grid; grid-template-columns: minmax(0, 1.4fr) 72px minmax(0, 1fr) 66px; gap: 8px; align-items: center; }
.meter-head { font-size: 12px; color: var(--muted); margin-bottom: 4px; }
.meter { padding: 6px 0; font-size: 14px; }
.meter-prev { color: var(--muted); font-variant-numeric: tabular-nums; }
.meter-used { text-align: right; font-variant-numeric: tabular-nums; font-size: 14px; }

.gas-item { display: flex; align-items: center; gap: 10px; padding: 6px 0; border-bottom: 1px solid var(--line); }
.gas-sum { font-weight: 600; white-space: nowrap; }
.gas-item .muted { flex: 1; font-size: 13px; }
.gas-add { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; margin-top: 10px; }
.gas-add input[type=text], .gas-add button { grid-column: 1 / -1; }
.block > .muted { font-size: 14px; margin: 10px 0 0; }

.line { display: flex; justify-content: space-between; gap: 12px; padding: 6px 0; }
.line-sum { white-space: nowrap; font-variant-numeric: tabular-nums; }
.line-total { margin-top: 6px; padding-top: 10px; border-top: 1px solid var(--line); font-size: 18px; font-weight: 700; white-space: nowrap; }
.paid-slot { margin-top: 10px; font-weight: 600; }
.actions { display: grid; gap: 8px; margin-top: 12px; }

.scroll { overflow-x: auto; background: var(--card); border-radius: 10px; margin-bottom: 16px; }
.tariffs th, .tariffs td { padding: 8px 10px; border-bottom: 1px solid var(--line); white-space: nowrap; font-size: 14px; }
.tariffs th { color: var(--muted); font-weight: 600; text-align: left; }
.tariff-form { background: var(--card); border-radius: 10px; padding: 16px; }
.tariff-form p { margin: 0 0 12px; font-size: 14px; }
.tariff-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 12px; }
.tariff-form .check { margin-bottom: 12px; }
.logout { margin-top: 16px; }

.login { max-width: 340px; margin: 12vh auto 0; padding: 24px; background: var(--card); border-radius: 12px; display: grid; gap: 10px; }
.login h1 { margin: 0 0 6px; color: var(--link); }

#toast {
  position: fixed;
  left: 50%;
  bottom: 20px;
  transform: translateX(-50%);
  z-index: 20;
  max-width: min(480px, calc(100% - 32px));
  padding: 10px 16px;
  border-radius: 10px;
  background: #24302d;
  color: #fff;
  font-size: 14px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, .3);
}
#toast.error { background: #b71c1c; }

@media (max-width: 720px) {
  .content { padding: 12px; }
  .stat-value { font-size: 20px; }
  .stat { padding: 12px; }
  .wide { display: none; }
  .months th, .months td { padding: 10px 8px; }
  .months th.c { width: 76px; }
  .tariff-grid { grid-template-columns: minmax(0, 1fr); }
  .export-row .button { width: 100%; }
  .export-row label { flex: 1 1 100%; }
  .export-row select { flex: 1; }
}