:root {
  color-scheme: light;
  --background: #f6f7f9;
  --surface: #ffffff;
  --surface-soft: #eef3ff;
  --text: #172033;
  --muted: #687386;
  --border: #dfe3ea;
  --primary: #2563eb;
  --primary-dark: #1749b8;
  --accent: #f5b942;
  --income: #138a68;
  --income-soft: #e4f5ef;
  --expense: #d94b4b;
  --expense-soft: #fdeaea;
  --danger: #b4232c;
  --shadow: 0 8px 24px rgba(26, 38, 67, 0.08);
  --radius: 8px;
  font-family: Inter, "Segoe UI", "Microsoft YaHei", sans-serif;
  font-size: 16px;
}

* { box-sizing: border-box; }
html { min-width: 320px; background: var(--background); }
body { margin: 0; color: var(--text); background: var(--background); min-height: 100vh; padding-bottom: calc(76px + env(safe-area-inset-bottom)); }
button, input, select { font: inherit; letter-spacing: 0; }
button, label.file-button { -webkit-tap-highlight-color: transparent; }
button { cursor: pointer; }
svg { width: 18px; height: 18px; stroke-width: 2; flex: 0 0 auto; }
[hidden] { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }

.app-header { background: var(--surface); border-bottom: 1px solid var(--border); }
.header-inner { max-width: 1180px; margin: 0 auto; min-height: 78px; padding: 14px 18px; display: flex; align-items: center; gap: 12px; }
.brand-mark { width: 44px; height: 44px; border-radius: var(--radius); display: grid; place-items: center; background: var(--primary); color: white; box-shadow: 5px 5px 0 var(--accent); }
.brand-mark svg { width: 24px; height: 24px; }
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 0; font-size: 1.35rem; line-height: 1.2; letter-spacing: 0; }
h2 { margin-bottom: 0; font-size: 1.2rem; letter-spacing: 0; }
h3 { margin-bottom: 12px; font-size: 1rem; letter-spacing: 0; }
.eyebrow { margin-bottom: 3px; color: var(--muted); font-size: .75rem; font-weight: 600; text-transform: uppercase; }
.desktop-add { margin-left: auto; }

.app-main { max-width: 1180px; margin: 0 auto; padding: 18px; }
.view { width: 100%; }
.summary-strip { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; margin-bottom: 18px; overflow: hidden; border: 1px solid var(--border); border-radius: var(--radius); background: var(--border); }
.summary-strip > div { background: var(--surface); padding: 14px; min-width: 0; }
.summary-primary { grid-column: 1 / -1; background: var(--surface-soft) !important; border-left: 4px solid var(--primary); }
.summary-strip span { display: flex; align-items: center; gap: 5px; color: var(--muted); font-size: .78rem; }
.summary-strip strong { display: block; margin-top: 5px; font-size: 1.15rem; white-space: nowrap; font-variant-numeric: tabular-nums; }
.summary-primary strong { font-size: 1.7rem; }
.summary-item.income strong { color: var(--income); }
.summary-item.expense strong { color: var(--expense); }
.summary-item.income svg { color: var(--income); }
.summary-item.expense svg { color: var(--expense); }

.workspace-layout { display: grid; gap: 18px; }
.entry-tool { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 18px; }
.home-content { display: grid; gap: 18px; min-width: 0; }
.content-section { padding: 18px 0; border-top: 1px solid var(--border); }
.section-heading, .page-heading { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 16px; }
.page-heading { margin-bottom: 22px; }
.page-heading h2 { font-size: 1.55rem; }

.segmented-control { border: 0; padding: 0; margin: 0 0 16px; display: grid; grid-template-columns: 1fr 1fr; gap: 6px; background: #edf0f5; border-radius: 7px; }
.segmented-control label { min-width: 0; }
.segmented-control input { position: absolute; opacity: 0; pointer-events: none; }
.segmented-control span { min-height: 42px; display: flex; align-items: center; justify-content: center; gap: 6px; border: 1px solid transparent; border-radius: 6px; color: var(--muted); font-weight: 600; }
.segmented-control input:checked + span { background: var(--surface); color: var(--primary); border-color: var(--border); box-shadow: 0 2px 5px rgba(28, 39, 67, .08); }
.segmented-control input:focus-visible + span { outline: 3px solid rgba(37, 99, 235, .25); }

.field { display: grid; gap: 7px; margin-bottom: 14px; color: var(--text); font-size: .83rem; font-weight: 600; }
.field small { color: var(--muted); font-weight: 400; }
.field input, .field select, .filter-bar input, .filter-bar select, .search-field { width: 100%; min-width: 0; height: 44px; border: 1px solid var(--border); border-radius: 6px; background: var(--surface); color: var(--text); padding: 0 12px; outline: none; }
.field input:focus, .field select:focus, .filter-bar input:focus, .filter-bar select:focus, .search-field:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37, 99, 235, .13); }
.amount-input-wrap { display: flex; align-items: center; height: 58px; border: 1px solid var(--border); border-radius: 6px; background: #fbfcff; overflow: hidden; }
.amount-input-wrap:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37, 99, 235, .13); }
.amount-input-wrap b { padding-left: 14px; color: var(--primary); font-size: 1.25rem; }
.amount-input-wrap input { height: 56px; border: 0; box-shadow: none !important; background: transparent; font-size: 1.55rem; font-weight: 700; font-variant-numeric: tabular-nums; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }

.primary-button, .secondary-button, .danger-button, .text-button, .icon-button { border: 0; display: inline-flex; align-items: center; justify-content: center; gap: 7px; font-weight: 650; }
.primary-button { min-height: 46px; width: 100%; padding: 0 16px; border-radius: 6px; color: white; background: var(--primary); }
.primary-button:hover { background: var(--primary-dark); }
.primary-button.compact { width: auto; min-height: 42px; }
.secondary-button { min-height: 42px; padding: 0 14px; border: 1px solid var(--border); border-radius: 6px; color: var(--text); background: var(--surface); }
.danger-button { min-height: 42px; padding: 0 14px; border: 1px solid #f1b7b9; border-radius: 6px; color: var(--danger); background: #fff5f5; }
.text-button { min-height: 36px; padding: 0 4px; color: var(--primary); background: transparent; }
.icon-button { width: 42px; height: 42px; border: 1px solid var(--border); border-radius: 6px; color: var(--text); background: var(--surface); }
.icon-button:hover, .secondary-button:hover { background: #f1f4f9; }
button:focus-visible, label.file-button:focus-within { outline: 3px solid rgba(37, 99, 235, .3); outline-offset: 2px; }

.entry-list { display: grid; }
.entry-row { display: grid; grid-template-columns: 40px minmax(0, 1fr) auto; align-items: center; gap: 11px; min-height: 68px; padding: 10px 0; border-bottom: 1px solid var(--border); }
.entry-row:last-child { border-bottom: 0; }
.category-icon { width: 40px; height: 40px; display: grid; place-items: center; border-radius: 7px; background: var(--surface-soft); color: var(--primary); }
.entry-main { min-width: 0; }
.entry-main strong, .entry-main span { display: block; overflow-wrap: anywhere; }
.entry-main span { margin-top: 3px; color: var(--muted); font-size: .77rem; }
.entry-value { text-align: right; font-weight: 700; white-space: nowrap; font-variant-numeric: tabular-nums; }
.entry-value.income { color: var(--income); }
.entry-value.expense { color: var(--expense); }
.entry-actions { display: flex; justify-content: flex-end; gap: 2px; margin-top: 5px; }
.entry-actions button { width: 30px; height: 30px; border: 0; border-radius: 5px; background: transparent; color: var(--muted); display: grid; place-items: center; }
.entry-actions button:hover { background: #edf0f5; color: var(--text); }
.entry-actions button svg { width: 15px; height: 15px; }
.empty-state { padding: 34px 14px; text-align: center; color: var(--muted); border-top: 1px dashed var(--border); }
.empty-state svg { width: 28px; height: 28px; margin-bottom: 8px; color: var(--primary); }
.empty-state p { margin-bottom: 10px; }
.chart-empty { min-height: 150px; display: grid; place-items: center; text-align: center; color: var(--muted); background: repeating-linear-gradient(0deg, transparent, transparent 31px, #e7eaf0 32px); }
.chart-shell { min-height: 190px; }
.chart-shell svg { display: block; width: 100%; height: auto; max-height: 250px; }
.chart-grid-line { stroke: var(--border); stroke-width: 1; }
.chart-income-bar { fill: var(--income); }
.chart-expense-bar { fill: var(--expense); }
.chart-axis-label { fill: var(--muted); font-size: 13px; }
.chart-legend { display: flex; justify-content: center; gap: 18px; color: var(--muted); font-size: .78rem; }
.chart-legend span { display: inline-flex; align-items: center; gap: 5px; }
.legend-swatch { width: 10px; height: 10px; border-radius: 2px; }
.legend-swatch.income { background: var(--income); }
.legend-swatch.expense { background: var(--expense); }
.breakdown-chart { display: grid; grid-template-columns: minmax(130px, 180px) minmax(0, 1fr); align-items: center; gap: 18px; padding-top: 8px; }
.donut-chart { width: 100%; height: auto; transform: rotate(-90deg); }
.donut-track, .donut-segment { fill: none; stroke-width: 20; }
.donut-track { stroke: #e9edf3; }
.donut-segment { stroke-linecap: butt; }
.donut-segment.series-1 { stroke: var(--primary); }
.donut-segment.series-2 { stroke: var(--expense); }
.donut-segment.series-3 { stroke: var(--accent); }
.donut-segment.series-4 { stroke: var(--income); }
.donut-segment.series-5 { stroke: #7659a7; }
.donut-caption, .donut-value { transform: rotate(90deg); transform-origin: 90px 90px; fill: var(--muted); font-size: 11px; }
.donut-value { fill: var(--text); font-size: 13px; font-weight: 700; }
.breakdown-details { display: grid; gap: 14px; }
.breakdown-label { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; margin-bottom: 6px; }
.breakdown-label strong { font-size: .88rem; }
.breakdown-label span { color: var(--muted); font-size: .75rem; font-variant-numeric: tabular-nums; }
.breakdown-track { height: 9px; overflow: hidden; border-radius: 4px; background: #e9edf3; }
.breakdown-track span { display: block; height: 100%; min-width: 2px; border-radius: inherit; background: var(--primary); }
.breakdown-row.series-1 .breakdown-track span { background: var(--primary); }
.breakdown-row.series-2 .breakdown-track span { background: var(--expense); }
.breakdown-row.series-3 .breakdown-track span { background: var(--accent); }
.breakdown-row.series-4 .breakdown-track span { background: var(--income); }
.breakdown-row.series-5 .breakdown-track span { background: #7659a7; }

.filter-bar { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; padding: 12px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); }
.search-field { grid-column: 1 / -1; display: flex; align-items: center; gap: 8px; }
.search-field input { height: 40px; padding: 0; border: 0; outline: 0; background: transparent; width: 100%; min-width: 0; }
.filter-bar .icon-button { width: 100%; }
.result-count { margin: 14px 0 4px; color: var(--muted); font-size: .82rem; }
.full-list { background: var(--surface); padding: 0 14px; border: 1px solid var(--border); border-radius: var(--radius); }
.statistics-layout, .settings-layout { display: grid; gap: 18px; }
.statistics-layout .content-section, .settings-layout .content-section { border-top: 1px solid var(--border); }
.supporting-copy { color: var(--muted); font-size: .88rem; }
.category-form { display: grid; grid-template-columns: 1fr 1.2fr auto; gap: 8px; margin-bottom: 16px; }
.category-form select, .category-form input { min-width: 0; height: 42px; padding: 0 10px; border: 1px solid var(--border); border-radius: 6px; background: var(--surface); color: var(--text); }
.category-manager { display: grid; }
.category-row { display: grid; grid-template-columns: minmax(0, 1fr) auto auto; align-items: center; gap: 8px; min-height: 58px; border-bottom: 1px solid var(--border); }
.category-row:last-child { border-bottom: 0; }
.category-edit { min-width: 0; display: grid; gap: 4px; }
.category-edit strong { font-size: .77rem; color: var(--muted); }
.category-edit input { min-width: 0; height: 34px; border: 1px solid var(--border); border-radius: 5px; padding: 0 8px; }
.category-active { display: inline-flex; align-items: center; gap: 5px; color: var(--muted); font-size: .75rem; white-space: nowrap; }
.category-active input { width: 18px; height: 18px; accent-color: var(--primary); }
.import-preview { margin-top: 12px; padding: 12px; border-left: 3px solid var(--accent); background: #fff9e8; color: var(--text); font-size: .82rem; }
.button-row { display: flex; flex-wrap: wrap; gap: 8px; }
.file-button { position: relative; cursor: pointer; }
.file-button input { position: absolute; width: 1px; height: 1px; opacity: 0; }
.danger-zone { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 16px; border: 1px solid #f1b7b9; border-radius: var(--radius); background: #fffafa; }
.danger-zone h3 { margin-bottom: 4px; color: var(--danger); }
.danger-zone p { margin: 0; color: var(--muted); font-size: .8rem; }

.bottom-nav { position: fixed; z-index: 20; left: 0; right: 0; bottom: 0; min-height: 66px; padding-bottom: env(safe-area-inset-bottom); display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--border); background: var(--surface); }
.bottom-nav button { min-width: 0; min-height: 64px; border: 0; background: transparent; color: var(--muted); display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 4px; font-size: .72rem; }
.bottom-nav button[aria-current="page"] { color: var(--primary); font-weight: 700; }
.bottom-nav button[aria-current="page"] svg { stroke-width: 2.5; }
.status-message { position: fixed; z-index: 30; left: 50%; bottom: calc(82px + env(safe-area-inset-bottom)); transform: translate(-50%, 12px); max-width: calc(100% - 32px); padding: 10px 14px; border-radius: 6px; background: var(--text); color: white; box-shadow: var(--shadow); opacity: 0; pointer-events: none; transition: opacity .18s ease, transform .18s ease; text-align: center; font-size: .86rem; }
.status-message.visible { opacity: 1; transform: translate(-50%, 0); }
.status-message.error { background: var(--danger); }

@media (min-width: 720px) {
  .summary-strip { grid-template-columns: 2fr 1fr 1fr; }
  .summary-primary { grid-column: auto; }
  .filter-bar { grid-template-columns: minmax(220px, 2fr) repeat(4, minmax(130px, 1fr)) 42px; align-items: center; }
  .search-field { grid-column: auto; }
  .filter-bar .icon-button { width: 42px; }
  .statistics-layout, .settings-layout { grid-template-columns: 1fr 1fr; }
  .settings-layout .danger-zone { grid-column: 1 / -1; }
}

@media (min-width: 960px) {
  body { padding-bottom: 0; }
  .app-main { padding: 26px 24px 40px; }
  .header-inner { padding-inline: 24px; }
  .workspace-layout { grid-template-columns: minmax(300px, 360px) minmax(0, 1fr); align-items: start; gap: 30px; }
  .entry-tool { position: sticky; top: 20px; }
  .content-section { padding-top: 0; border-top: 0; }
  .home-content { gap: 28px; }
  .bottom-nav { position: static; max-width: 1180px; min-height: 56px; margin: 0 auto; padding: 0 24px; border-top: 0; border-bottom: 1px solid var(--border); background: var(--surface); display: flex; }
  .bottom-nav button { min-height: 54px; padding: 0 18px; flex-direction: row; font-size: .85rem; border-bottom: 3px solid transparent; }
  .bottom-nav button[aria-current="page"] { border-bottom-color: var(--primary); }
  .status-message { bottom: 24px; }
}

@media (max-width: 359px) {
  .app-main { padding: 14px 12px; }
  .header-inner { padding-inline: 12px; }
  .form-grid { grid-template-columns: 1fr; gap: 0; }
  .summary-strip strong { font-size: 1rem; }
  .summary-primary strong { font-size: 1.45rem; }
  .danger-zone { align-items: stretch; flex-direction: column; }
  .category-form { grid-template-columns: 1fr; }
  .category-row { grid-template-columns: minmax(0, 1fr) auto; }
  .category-active { grid-column: 1 / -1; }
}

@media (max-width: 520px) {
  .breakdown-chart { grid-template-columns: 1fr; }
  .donut-chart { max-width: 170px; margin: 0 auto; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; }
}