:root {
  --fs: 1;  /* hệ số cỡ chữ, đổi trong Thêm → Cỡ chữ */
  --bg: #f4f6f5; --card: #ffffff; --text: #1c2421; --muted: #4b5652; --line: #e3e8e6;
  --accent: #0f766e; --accent-soft: #d6efec; --in: #15803d; --out: #c2410c; --danger: #b91c1c;
  --warn: #b45309; --warn-soft: #fdf0d5; --over-soft: #fde2e0;
  --radius: 14px; --nav-h: 70px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1413; --card: #182120; --text: #e6ecea; --muted: #b6c3be; --line: #26322f;
    --accent: #2dd4bf; --accent-soft: #123a36; --in: #4ade80; --out: #fb923c; --danger: #f87171;
    --warn: #fbbf24; --warn-soft: #3a2e10; --over-soft: #3d1a17;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: calc(17px * var(--fs))/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  padding-bottom: calc(var(--nav-h) + env(safe-area-inset-bottom) + 16px);
}
body.bare { padding-bottom: 0; }
a { color: var(--accent); text-decoration: none; }
main { max-width: 640px; margin: 0 auto; padding: 0 16px; }
h1, h2 { margin: 0; }
h2 { font-size: calc(17px * var(--fs)); font-weight: 600; }

.top {
  position: sticky; top: 0; z-index: 5; background: var(--bg);
  padding: calc(env(safe-area-inset-top) + 12px) 16px 10px; max-width: 640px; margin: 0 auto;
}
.top h1 { font-size: calc(24px * var(--fs)); }

.flash { background: var(--accent-soft); color: var(--text); padding: 10px 14px; border-radius: 10px; margin: 8px 0 12px; }
.flash.err, .flash.over { background: var(--over-soft); }
.flash.warn { background: var(--warn-soft); }

.card { background: var(--card); border-radius: var(--radius); padding: 14px 16px; margin: 0 0 12px; }
.card > h2 { margin-bottom: 10px; }
.card-h { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; margin-bottom: 8px; }
.card-h > b { white-space: nowrap; }
details.card summary { cursor: pointer; font-weight: 600; color: var(--accent); }
details.card[open] summary { margin-bottom: 12px; }
.muted { color: var(--muted); }
.small { font-size: calc(15px * var(--fs)); }
.empty { color: var(--muted); text-align: center; padding: 16px 0; margin: 0; }
.big { font-size: calc(22px * var(--fs)); }
.neg, .expense { color: var(--out); }
.income { color: var(--in); }

.month-nav { display: flex; align-items: center; justify-content: space-between; margin: 4px 0 12px; }
.month-nav a { font-size: calc(26px * var(--fs)); padding: 0 14px; line-height: 1; }
.month-nav b { font-size: calc(18px * var(--fs)); }

/* ô thống kê: tự xếp 1 cột khi chữ to (mỗi ô cần chỗ theo cỡ chữ) */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(calc(150px * var(--fs)), 1fr)); gap: 8px; margin-bottom: 12px; }
.stats .stat:nth-child(3) { grid-column: 1 / -1; display: flex; justify-content: space-between; align-items: baseline; gap: 8px; }
.stat { background: var(--card); border-radius: var(--radius); padding: 10px 12px; min-width: 0; }
.stat small { display: block; color: var(--muted); font-size: calc(14px * var(--fs)); }
.stat b { display: block; font-size: calc(18px * var(--fs)); font-variant-numeric: tabular-nums; white-space: nowrap; }

.kv { list-style: none; margin: 0; padding: 0; }
.kv a { display: flex; justify-content: space-between; gap: 8px; padding: 6px 0; color: var(--text); border-top: 1px solid var(--line); }
.kv li:first-child a { border-top: 0; }
.kv b { font-variant-numeric: tabular-nums; font-weight: 600; }

.bars { list-style: none; margin: 0; padding: 0; }
.bars li a { display: block; padding: 6px 0; color: var(--text); }
.bar-top { display: flex; justify-content: space-between; gap: 8px; font-size: calc(16px * var(--fs)); }
.bar-top small { color: var(--muted); }
.bar { position: relative; height: 8px; background: var(--line); border-radius: 4px; margin-top: 4px; overflow: hidden; }
.bar i { display: block; height: 100%; background: var(--accent); border-radius: 4px; }
.bar.warn i { background: var(--warn); }
.bar.over i { background: var(--danger); }
.bar .pace { position: absolute; top: 0; bottom: 0; width: 2px; background: var(--text); opacity: .55; }
.pace-dot { display: inline-block; width: 2px; height: 10px; background: var(--text); opacity: .55; vertical-align: middle; }

/* Ngân sách */
.sub { margin: 8px 0 0; font-size: calc(16px * var(--fs)); }
.legend { margin: 4px 0 0; }
.budget-list .mid .bar-top b { display: inline; }
.rows.budget-list .mid small, .rows.wrap .mid small { white-space: normal; margin-top: 3px; }
.tag { font-style: normal; font-size: calc(13px * var(--fs)); font-weight: 500; color: var(--accent); background: var(--accent-soft); padding: 1px 6px; border-radius: 6px; }
.alert { display: block; margin-top: 8px; padding: 8px 12px; border-radius: 10px; color: var(--text); font-size: calc(16px * var(--fs)); }
.alert.warn { background: var(--warn-soft); }
.alert.over { background: var(--over-soft); }
.hint-card { display: block; color: var(--accent); font-weight: 500; }
.budget-field .lbl b { color: var(--text); font-weight: 500; }
.radio { display: flex; align-items: center; gap: 8px; padding: 6px 0; }
.radio input { width: auto; min-height: 0; }
.amt.debt { color: var(--muted); }
.warn-text { color: var(--warn); }
.alert:not(.warn):not(.over) { background: var(--bg); }
.kv.info { margin-top: 10px; }
.kv.info li { display: flex; justify-content: space-between; gap: 12px; padding: 6px 0; border-top: 1px solid var(--line); font-size: calc(16px * var(--fs)); }
.kv.info li span { color: var(--muted); }
.kv.info li b { font-weight: 500; text-align: right; }
.add-debt { margin-bottom: 12px; }
.add-debt .btn { flex: 1; padding: 10px 6px; font-size: calc(16px * var(--fs)); }
.radio small { display: block; margin-top: 2px; }
/* Form vay nợ: hiện nhãn/ô theo loại */
.debtform .k-borrow, .debtform .k-lend, .debtform .k-installment { display: none; }
.debtform[data-kind=borrow] .k-borrow, .debtform[data-kind=lend] .k-lend,
.debtform[data-kind=installment] .k-installment { display: inline; }
.debtform[data-kind=installment] .only-loan, .debtform:not([data-kind=installment]) .only-installment { display: none; }
/* Định kỳ */
.pending { padding: 10px 0; border-top: 1px solid var(--line); }
.pending:first-of-type { border-top: 0; padding-top: 2px; }
.pending-row { display: grid; grid-template-columns: 1fr auto auto; gap: 6px; margin-top: 6px; }
.pending-row .btn { padding: 8px 12px; }
.pending-row input { font-weight: 600; text-align: right; font-variant-numeric: tabular-nums; }
.kv.upcoming { margin-top: 6px; border-top: 1px solid var(--line); }
.kv.upcoming a { font-size: calc(16px * var(--fs)); }
.kv b.expense { color: var(--out); }
.kv b.income { color: var(--in); }
.kv b.transfer { color: var(--muted); }
.center { text-align: center; }
/* Nhập sao kê */
.small-btn { padding: 6px 12px; min-height: 36px; font-size: calc(15px * var(--fs)); }
.imp-list { list-style: none; margin: 0 0 12px; padding: 0; }
.imp { background: var(--card); border-radius: 12px; padding: 10px 12px; margin-bottom: 8px; }
.imp.dup { opacity: .55; }
.imp.match { box-shadow: inset 3px 0 0 var(--warn); }
.imp-top { display: flex; align-items: center; gap: 10px; }
.imp-top input[type=checkbox] { width: calc(22px * var(--fs)); height: calc(22px * var(--fs)); min-height: 0; flex: none; }
.imp-check { width: calc(22px * var(--fs)); text-align: center; color: var(--muted); }
.imp-date { color: var(--muted); font-size: calc(15px * var(--fs)); flex: 1; }
.imp-top .amt { font-weight: 600; font-variant-numeric: tabular-nums; }
.imp-desc { font-size: calc(15px * var(--fs)); margin: 4px 0 6px calc(32px * var(--fs)); overflow-wrap: anywhere;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.imp-note { font-size: calc(15px * var(--fs)); margin: 0 0 6px calc(32px * var(--fs)); }
.imp-note .radio { padding: 4px 0 0; }
.imp select, .imp > small { margin-left: calc(32px * var(--fs)); width: calc(100% - calc(32px * var(--fs))); }
.imp > small { display: block; margin-top: 3px; font-size: calc(14px * var(--fs)); }
.imp-cat { min-height: 40px; padding: 6px 10px; }
.imp-cat.guess { border-color: var(--warn); }
/* dòng khớp ghi tay: chỉ hiện ô danh mục khi người dùng tick nhập dòng đó */
.imp.match:not(:has(.imp-inc:checked)) .imp-cat,
.imp.match:not(:has(.imp-inc:checked)) > small { display: none; }
.imp:not(.dup):not(:has(.imp-inc:checked)) .imp-desc { opacity: .6; }
.import-tools { margin: 4px 0 8px; }
.sticky-actions { position: sticky; bottom: calc(var(--nav-h) + env(safe-area-inset-bottom) + 8px); padding-top: 4px; }
.import-form .grid2 { margin-top: 8px; }
textarea { width: 100%; padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px; background: var(--card);
  font: 16px/1.4 ui-monospace, Consolas, monospace; resize: vertical; }
textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
.raw { font-family: ui-monospace, Consolas, monospace; overflow-wrap: anywhere; }
code { font-family: ui-monospace, Consolas, monospace; font-size: calc(15px * var(--fs)); background: var(--bg); padding: 1px 5px; border-radius: 5px; overflow-wrap: anywhere; }
.copy { margin: 8px 0; }
.copy code { display: block; padding: 8px 10px; margin-top: 2px; user-select: all; -webkit-user-select: all; }
.guide ol { padding-left: 20px; margin: 8px 0 0; }
.guide li { margin-bottom: 8px; }
.guide ul { padding-left: 18px; margin: 6px 0 0; }
.rows .mid small + small { margin-top: 2px; }
/* Biểu đồ thu chi — màu chuỗi đã kiểm tra (xanh dương = Thu, cam = Chi; đạt cả với người mù màu, sáng & tối) */
.viz { --s-in: #2a78d6; --s-out: #eb6834; }
@media (prefers-color-scheme: dark) { .viz { --s-in: #3987e5; --s-out: #d95926; } }
.viz .s-in { background: var(--s-in); }
.viz .s-out { background: var(--s-out); }
.hero { text-align: center; padding: 18px 16px; }
.hero small { display: block; color: var(--muted); }
.hero-num { display: block; font-size: calc(44px * var(--fs)); line-height: 1.1; margin: 4px 0; font-variant-numeric: tabular-nums; }
.hero p { margin: 0; }
.stack-bar { display: flex; gap: 2px; height: calc(22px * var(--fs)); margin: 8px 0 10px; }
.stack-bar i { display: block; height: 100%; }
.stack-bar i:first-child { border-radius: 4px 0 0 4px; }
.stack-bar i:last-child { border-radius: 0 4px 4px 0; }
.stack-bar i:only-child { border-radius: 4px; }
.legend { list-style: none; margin: 4px 0 10px; padding: 0; display: flex; flex-wrap: wrap; gap: 4px 16px; }
.legend li { display: block; }  /* chữ chú thích chảy liền, xuống dòng tự nhiên khi chữ to */
.legend .sw { vertical-align: -0.1em; margin-right: 6px; }
.legend b { font-variant-numeric: tabular-nums; }
.sw { width: calc(12px * var(--fs)); height: calc(12px * var(--fs)); border-radius: 3px; flex: none; display: inline-block; }
.share { list-style: none; margin: 0; padding: 0; }
.share li a { display: block; padding: 8px 0; color: var(--text); border-top: 1px solid var(--line); }
.share li:first-child a { border-top: 0; }
.share-top, .share-sub { display: flex; justify-content: space-between; gap: 10px; }
.share-name { min-width: 0; }
.share-pct { font-weight: 700; font-variant-numeric: tabular-nums; white-space: nowrap; }
.share-sub { color: var(--muted); font-size: calc(14px * var(--fs)); margin-top: 2px; }
.share-sub span:first-child { font-variant-numeric: tabular-nums; white-space: nowrap; }
.share-sub span:last-child { text-align: right; }
.share-track { height: calc(10px * var(--fs)); margin-top: 5px; }
.share-track i { display: block; height: 100%; border-radius: 0 4px 4px 0; }
.cols { display: flex; gap: 6px; height: calc(170px * var(--fs)); margin: 6px 0 8px; border-bottom: 1px solid var(--line); }
.col { flex: 1; display: flex; flex-direction: column; min-width: 0; color: var(--muted); }
.col-bars { flex: 1; display: flex; align-items: flex-end; justify-content: center; gap: 2px; }
.col-bars i { display: block; width: 40%; max-width: 22px; border-radius: 4px 4px 0 0; min-height: 0; }
.col:hover .col-bars i, .col:focus-visible .col-bars i { filter: brightness(1.12); }
.col-label { text-align: center; font-size: calc(14px * var(--fs)); padding-top: 4px; }
.col.cur .col-label { color: var(--text); font-weight: 700; }
.table-wrap { overflow-x: auto; margin-top: 8px; }
.nums { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; font-size: calc(15px * var(--fs)); }
.nums th, .nums td { padding: 6px 4px; text-align: right; white-space: nowrap; border-top: 1px solid var(--line); }
.nums th { color: var(--muted); font-weight: 600; border-top: 0; }
.nums th:first-child, .nums td:first-child { text-align: left; }
.nums tr.cur td { font-weight: 700; }
.nw { white-space: nowrap; }
/* Xác thực 2 lớp */
.otp { font-size: calc(28px * var(--fs)); letter-spacing: .25em; text-align: center; font-variant-numeric: tabular-nums; }
.qr { background: #fff; padding: 8px; border-radius: 10px; width: min(240px, 100%); margin: 8px 0; }
.qr svg { display: block; width: 100%; height: auto; }
.secret { display: block; margin-top: 6px; padding: 8px 10px; font-size: calc(17px * var(--fs)); letter-spacing: .05em;
  user-select: all; -webkit-user-select: all; }
.codes-card { border: 2px solid var(--warn); }
.codes { columns: 2; column-gap: 16px; padding-left: 28px; margin: 10px 0; }
.codes li { margin-bottom: 6px; }
.codes code { font-size: calc(18px * var(--fs)); }
/* Nhật ký truy cập */
.seg-days { display: flex; flex-wrap: wrap; gap: 6px; background: none; padding: 0; margin: 4px 0 12px; }
.seg-days a { flex: 1 1 auto; text-align: center; white-space: nowrap; padding: 8px 10px; border-radius: 10px; background: var(--card);
  border: 1px solid var(--line); color: var(--text); font-weight: 600; font-size: calc(15px * var(--fs)); }
.seg-days a.on { background: var(--accent); border-color: var(--accent); color: #fff; }
@media (prefers-color-scheme: dark) { .seg-days a.on { color: #062723; } }
.tag-warn { color: var(--warn); background: var(--warn-soft); }
.rows li.ev-bad .mid b { color: var(--danger); }
.card-alert { margin: 0 0 12px; }
.field .hint { display: block; margin-top: 4px; font-size: calc(14px * var(--fs)); line-height: 1.4; }
.bank-diff a { color: var(--text); }
.bank-diff p { margin: 6px 0; }
.bank-diff .btn { background: var(--card); }
.stats-grid .stat:nth-child(3) { grid-column: auto; display: block; }  /* lưới đều, không kéo dài ô thứ 3 */
/* Chọn cỡ chữ */
.fs-pick { display: flex; flex-wrap: wrap; gap: 8px; margin: 4px 0 8px; }
.fs-pick button { flex: 1 1 auto; min-height: 48px; padding: 6px 10px; border-radius: 10px; border: 1px solid var(--line);
  background: var(--bg); cursor: pointer; font-weight: 600; }
.fs-pick button[aria-checked=true] { background: var(--accent); border-color: var(--accent); color: #fff; }
@media (prefers-color-scheme: dark) { .fs-pick button[aria-checked=true] { color: #062723; } }
/* Mục tiêu */
.grid-icon { display: grid; grid-template-columns: 76px minmax(0, 1fr); gap: 0 10px; }
.grid-icon input[name=icon] { text-align: center; font-size: calc(22px * var(--fs)); }
.seg2 { grid-template-columns: 1fr 1fr; margin-top: 0; background: var(--bg); }
.goalform .d-out { display: none; }
.goalform[data-dir=out] .d-in { display: none; }
.goalform[data-dir=out] .d-out { display: inline; }
.rows li.entry { display: flex; align-items: center; gap: 12px; padding: 10px 0; border-top: 1px solid var(--line); }
.rows li.entry:first-child { border-top: 0; }
.rows li.entry form { flex: none; }
.x { border: 0; background: none; color: var(--muted); cursor: pointer; padding: 8px; min-width: 36px; min-height: 36px; font-size: calc(16px * var(--fs)); }
.bars small.muted { display: block; font-size: calc(14px * var(--fs)); margin-top: 3px; }
.budget-hint { font-size: calc(15px * var(--fs)); margin-top: 8px; padding: 0 2px; }
.budget-hint:empty { display: none; }
.budget-hint.ok { color: var(--muted); }
.budget-hint.warn { color: var(--warn); }
.budget-hint.over { color: var(--danger); font-weight: 600; }

.rows { list-style: none; margin: 0; padding: 0; }
ul.rows.card { padding: 4px 16px; }
.rows a { display: flex; align-items: center; gap: 12px; padding: 10px 0; color: var(--text); border-top: 1px solid var(--line); }
.rows li:first-child a { border-top: 0; }
.rows li.dim { opacity: .5; }
.rows .ic { width: calc(36px * var(--fs)); height: calc(36px * var(--fs)); flex: none; display: grid; place-items: center; font-size: calc(21px * var(--fs)); background: var(--bg); border-radius: 10px; }
.rows .mid { flex: 1; min-width: 0; }
.rows .mid b { display: block; font-weight: 500; }
.rows .mid small { display: block; color: var(--muted); font-size: calc(15px * var(--fs)); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.rows .amt { font-variant-numeric: tabular-nums; font-weight: 600; white-space: nowrap; }
.amt.income { color: var(--in); }
.amt.expense { color: var(--out); }
.amt.transfer { color: var(--muted); }

.day { background: var(--card); border-radius: var(--radius); padding: 4px 16px; margin-bottom: 10px; }
.day-h { display: flex; justify-content: space-between; gap: 8px; padding: 8px 0 2px; font-size: calc(15px * var(--fs)); color: var(--muted); }
.day-h b { color: var(--text); }

.filters { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-bottom: 4px; }
.filters input[type=search] { grid-column: 1 / -1; }

input, select, button { font: inherit; color: inherit; }
input, select {
  width: 100%; padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px;
  background: var(--card); min-height: 44px;
}
input:focus, select:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
.field { display: block; margin-bottom: 12px; }
.lbl { display: block; font-size: calc(15px * var(--fs)); color: var(--muted); margin-bottom: 4px; }
.grid2 { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 0 10px; }
.grid2 > *, input[type=date] { min-width: 0; }
.stack .field:last-of-type { margin-bottom: 14px; }

.btn {
  display: inline-block; text-align: center; padding: 11px 18px; min-height: 44px; border-radius: 10px;
  border: 1px solid var(--line); background: var(--card); cursor: pointer; font-weight: 600;
}
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
@media (prefers-color-scheme: dark) { .btn.primary { color: #062723; } }
.btn.danger { color: var(--danger); }
.btn.wide, .stack .btn { width: 100%; }
.row-actions { display: flex; gap: 10px; }
.row-actions form { flex: 1; }
.row-actions .btn { width: 100%; }

/* Form ghi giao dịch */
.seg { display: grid; grid-template-columns: repeat(3, 1fr); background: var(--card); border-radius: 12px; padding: 4px; margin: 4px 0 12px; }
/* radio ẩn: phải bỏ width:100% chung của input, nếu không sẽ tràn ngang */
.seg label, .chip { position: relative; }
.seg input, .chip input {
  position: absolute; inset: 0; width: 1px; height: 1px; min-height: 0; padding: 0; border: 0;
  opacity: 0; pointer-events: none;
}
.seg span { display: block; text-align: center; padding: 9px 0; border-radius: 9px; font-weight: 600; color: var(--muted); cursor: pointer; }
.seg-expense input:checked + span { background: var(--out); color: #fff; }
.seg-income input:checked + span { background: var(--in); color: #fff; }
.seg-transfer input:checked + span { background: var(--accent); color: #fff; }
.seg input:focus-visible + span { outline: 2px solid var(--accent); }

.amount { background: var(--card); border-radius: var(--radius); padding: 12px; margin-bottom: 12px; }
.amount input { font-size: calc(30px * var(--fs)); font-weight: 700; text-align: right; border: 0; padding: 4px 6px; font-variant-numeric: tabular-nums; }
.txform[data-kind=expense] .amount input { color: var(--out); }
.txform[data-kind=income] .amount input { color: var(--in); }
.sfx { display: flex; gap: 6px; justify-content: flex-end; margin-top: 6px; }
.sfx button { min-width: 52px; min-height: 40px; border-radius: 9px; border: 1px solid var(--line); background: var(--bg); cursor: pointer; font-weight: 600; }
.preview { text-align: right; color: var(--muted); font-size: calc(15px * var(--fs)); min-height: 18px; margin-top: 4px; }
.preview.bad { color: var(--danger); }

.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip span { display: inline-block; padding: 7px 11px; border-radius: 999px; background: var(--card); border: 1px solid var(--line); cursor: pointer; font-size: calc(16px * var(--fs)); }
.chip input:checked + span { background: var(--accent-soft); border-color: var(--accent); font-weight: 600; }
.chip input:focus-visible + span { outline: 2px solid var(--accent); }
.txform[data-kind=expense] .chip[data-kind=income],
.txform[data-kind=income] .chip[data-kind=expense],
.txform[data-kind=transfer] .cat-wrap,
.txform:not([data-kind=transfer]) .to-wrap { display: none; }

.actions { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 6px; }
.actions .btn:only-child { grid-column: 1 / -1; }
.danger-zone { margin-top: 18px; text-align: center; }
.danger-zone .btn { border: 0; background: none; }

.todo { margin: 0; padding-left: 20px; }

.auth { max-width: 380px; margin: 0 auto; padding: calc(env(safe-area-inset-top) + 48px) 0 24px; text-align: center; }
.auth img { border-radius: 18px; }
.auth h1 { font-size: calc(24px * var(--fs)); margin: 12px 0 16px; }
.auth .card { text-align: left; }

/* Thanh điều hướng dưới */
.bottom {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 10;
  display: grid; grid-template-columns: repeat(5, 1fr); align-items: center;
  height: calc(var(--nav-h) + env(safe-area-inset-bottom)); padding-bottom: env(safe-area-inset-bottom);
  background: var(--card); border-top: 1px solid var(--line);
}
.bottom a { display: flex; flex-direction: column; align-items: center; font-size: calc(13px * min(var(--fs), 1.15)); color: var(--muted); gap: 2px; }
.bottom a span { font-size: calc(22px * min(var(--fs), 1.15)); line-height: 1; }
.bottom a.on { color: var(--accent); font-weight: 600; }
.bottom a.add span {
  width: 50px; height: 50px; border-radius: 50%; background: var(--accent); color: #fff;
  display: grid; place-items: center; font-size: calc(28px * min(var(--fs), 1.15)); margin-top: -18px; box-shadow: 0 4px 12px rgba(0,0,0,.2);
}
@media (prefers-color-scheme: dark) { .bottom a.add span { color: #062723; } }
@media (min-width: 700px) {
  .bottom { left: 50%; right: auto; width: 640px; transform: translateX(-50%); border-radius: 16px 16px 0 0; border: 1px solid var(--line); }
}