/* =========================================================
   清简记账 · Pure Ledger — Design Tokens
   Palette: ink blue + paper white + hairline gray, with a
   ledger-book "stitched binding" as the signature motif.
========================================================= */
:root{
  --paper:      #F6F8FB;
  --card:       #FFFFFF;
  --line:       #E4E9F0;
  --line-strong:#D6DEE8;
  --ink:        #2B3648;
  --ink-soft:   #6B7684;
  --ink-faint:  #9AA5B4;
  --accent:     #3D5A80;
  --accent-2:   #5E8ABA;
  --accent-soft:#A9D6E5;
  --accent-tint:#EAF1F8;
  --warn:       #9C3D54;
  --warn-tint:  #F7E9EC;
  --good:       #3F8F5F;

  --cat-food:    #E8A33D;
  --cat-transit: #3D8BA8;
  --cat-shop:    #8A6FBF;
  --cat-fun:     #C2618A;
  --cat-med:     #C1502E;
  --cat-edu:     #4A7FC1;
  --cat-home:    #8C6A56;
  --cat-other:   #8B95A3;

  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --shadow-card: 0 1px 2px rgba(43,54,72,.04), 0 6px 20px rgba(43,54,72,.06);

  --font-display: "Noto Serif SC", "Songti SC", serif;
  --font-body: "PingFang SC", "Noto Sans SC", -apple-system, "Helvetica Neue", Arial, sans-serif;
  --font-num: "Roboto Condensed", "Noto Sans SC", sans-serif;
}

[data-theme="dark"]{
  --paper:      #14181F;
  --card:       #1D232D;
  --line:       #2A313D;
  --line-strong:#343C4A;
  --ink:        #EAEEF4;
  --ink-soft:   #9FAAB8;
  --ink-faint:  #6C7684;
  --accent:     #7FA4D6;
  --accent-2:   #5E8ABA;
  --accent-soft:#3E5A70;
  --accent-tint:#202A38;
  --warn:       #E28A9A;
  --warn-tint:  #33232A;
  --good:       #6FBF8E;
}

*{ box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html,body{ height:100%; }
body{
  margin:0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  overscroll-behavior-y: none;
  transition: background .25s ease, color .25s ease;
}
button, input{ font-family: inherit; color: inherit; }
button{ background:none; border:none; cursor:pointer; }
input{ background: none; }
input:focus-visible, button:focus-visible{
  outline: 2px solid var(--accent-2);
  outline-offset: 2px;
}
::selection{ background: var(--accent-soft); }

.tabular{ font-variant-numeric: tabular-nums; }

/* ---------------- App shell ---------------- */
.app-shell{
  max-width: 480px;
  margin: 0 auto;
  min-height: 100vh;
  position: relative;
  background: var(--paper);
  display:flex;
  flex-direction:column;
}
@media (min-width: 481px){
  body{ background: var(--line); }
  .app-shell{
    box-shadow: 0 0 0 1px var(--line-strong), 0 20px 60px rgba(20,28,40,.18);
    min-height: 100vh;
  }
}

/* ---------------- Top bar ---------------- */
.topbar{
  position: sticky; top:0; z-index: 20;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
  padding-top: env(safe-area-inset-top);
}
.topbar-inner{
  display:flex; align-items:center; justify-content:space-between;
  padding: 14px 18px 12px;
}
.topbar-title{
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 22px;
  letter-spacing: .02em;
  margin:0;
}
.topbar-actions{ display:flex; gap:4px; }
.icon-btn{
  width: 36px; height:36px; border-radius: 50%;
  display:flex; align-items:center; justify-content:center;
  color: var(--ink-soft);
}
.icon-btn.ghost:active{ background: var(--accent-tint); color: var(--accent); }

/* ---------------- Pages / routing ---------------- */
.pages{ flex:1; padding: 14px 16px 96px; position:relative; }
.page{ display:none; animation: page-in .28s cubic-bezier(.25,.8,.4,1); }
.page.active{ display:block; }
@keyframes page-in{
  from{ opacity:0; transform: translateY(10px); }
  to{ opacity:1; transform: translateY(0); }
}

/* ---------------- Signature: stitched ledger card ---------------- */
.stitch-card{
  position: relative;
  background: var(--card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: 20px 18px 20px 26px;
  margin-bottom: 16px;
  overflow:hidden;
}
.stitch-card::before{
  content:"";
  position:absolute; left: 12px; top: 14px; bottom: 14px; width:0;
  border-left: 2px dashed var(--line-strong);
}

.hero-card{ padding-top: 22px; }
.hero-row{ display:flex; align-items:flex-end; gap:16px; }
.hero-divider{ width:1px; align-self:stretch; background: var(--line); margin: 2px 0; }
.eyebrow{
  margin:0 0 6px; font-size: 12.5px; color: var(--ink-soft); letter-spacing:.04em;
}
.amount-xl{
  margin:0; font-family: var(--font-num); font-weight:700; font-size: 34px;
  color: var(--ink); font-variant-numeric: tabular-nums;
}
.amount-lg{
  margin:0; font-family: var(--font-num); font-weight:700; font-size: 22px;
  color: var(--ink-soft); font-variant-numeric: tabular-nums;
}

/* budget ruled-line progress */
.budget-rule{ margin-top:18px; }
.rule-track{
  position:relative; height: 10px; border-radius: 6px;
  background: var(--paper); border:1px solid var(--line);
  overflow:hidden;
}
.rule-fill{
  position:absolute; inset:0 auto 0 0; width:0%;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  border-radius: 6px; transition: width .4s ease;
}
.rule-fill.over{ background: linear-gradient(90deg, var(--warn), #C1607A); }
.rule-ticks{
  position:absolute; inset:0; display:flex; justify-content:space-between; padding: 0 1px;
}
.rule-ticks::before, .rule-ticks::after{ content:none; }
.rule-caption{ margin: 8px 0 0; font-size: 12.5px; color: var(--ink-soft); }

/* ---------------- Section headers ---------------- */
.section-row{
  display:flex; align-items:center; justify-content:space-between;
  margin: 22px 4px 10px;
}
.section-title{
  font-family: var(--font-display); font-size: 16px; font-weight:700; margin:0;
}
.link-btn{ font-size: 13px; color: var(--accent); font-weight:500; }

/* ---------------- Quick category grid ---------------- */
.quick-grid{
  display:grid; grid-template-columns: repeat(4, 1fr); gap: 10px;
}
.quick-item{
  background: var(--card); border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  padding: 14px 4px 10px; display:flex; flex-direction:column; align-items:center; gap:8px;
  transition: transform .12s ease;
}
.quick-item:active{ transform: scale(.94); }
.cat-dot{
  width:40px; height:40px; border-radius:50%;
  display:flex; align-items:center; justify-content:center;
  color:#fff;
}
.quick-item span.cat-name{ font-size: 12px; color: var(--ink-soft); }

/* ---------------- Record list ---------------- */
.record-list, .record-list-grouped{ margin-top: 4px; }
.date-group{ margin-bottom: 6px; }
.date-group-head{
  display:flex; justify-content:space-between; align-items:baseline;
  padding: 14px 4px 8px; font-size: 12.5px; color: var(--ink-faint);
}
.date-group-head .d-total{ font-family: var(--font-num); }

.record-item{
  position:relative;
  display:flex; align-items:center; gap:12px;
  background: var(--card); border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  padding: 12px 14px 12px 20px;
  margin-bottom: 8px;
}
.record-item::before{
  content:""; position:absolute; left:9px; top:10px; bottom:10px; width:0;
  border-left: 2px dashed var(--line-strong);
}
.record-icon{
  width:38px; height:38px; border-radius:50%; flex:none;
  display:flex; align-items:center; justify-content:center; color:#fff;
}
.record-mid{ flex:1; min-width:0; }
.record-cat{ font-size:14.5px; font-weight:500; }
.record-note{ font-size:12.5px; color: var(--ink-soft); margin-top:2px; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.record-right{ text-align:right; flex:none; }
.record-amount{ font-family: var(--font-num); font-weight:700; font-size:16px; }
.record-amount.income{ color: var(--good); }
.record-time{ font-size:11.5px; color: var(--ink-faint); margin-top:2px; }
.record-item.pressable:active{ background: var(--accent-tint); }

.empty-hint{ text-align:center; color: var(--ink-faint); font-size:13.5px; padding: 30px 10px; }

/* ---------------- Voice + Add form ---------------- */
.voice-card{ text-align:center; padding-top:26px; padding-bottom: 22px; }
.voice-card::before{ display:none; }
.voice-btn{
  width:74px; height:74px; border-radius:50%; margin: 0 auto;
  display:flex; align-items:center; justify-content:center;
  background: radial-gradient(circle at 30% 25%, var(--accent-2), var(--accent));
  color:#fff; box-shadow: 0 8px 22px rgba(61,90,128,.35);
  transition: transform .15s ease, box-shadow .15s ease;
}
.voice-btn:active{ transform: scale(.94); }
.voice-btn.recording{ animation: pulse 1.15s ease-in-out infinite; }
@keyframes pulse{
  0%{ box-shadow: 0 0 0 0 rgba(61,90,128,.45); }
  70%{ box-shadow: 0 0 0 18px rgba(61,90,128,0); }
  100%{ box-shadow: 0 0 0 0 rgba(61,90,128,0); }
}
.voice-hint{ margin: 14px 0 0; font-size:13.5px; color: var(--ink-soft); }
.voice-transcript{ margin: 8px 0 0; font-size: 13.5px; color: var(--accent); min-height: 18px; }

.add-form{ display:flex; flex-direction:column; }
.field-label{ font-size:12.5px; color: var(--ink-soft); margin: 16px 2px 8px; }
.text-input{
  width:100%; border:1px solid var(--line); background: var(--card);
  border-radius: var(--radius-sm); padding: 13px 14px; font-size:15px; color: var(--ink);
}
.text-input.flat{ border:1px solid var(--line-strong); background: var(--paper); }
.amount-input-row{
  display:flex; align-items:center; gap:8px; border:1px solid var(--line);
  background: var(--card); border-radius: var(--radius-md); padding: 10px 14px;
}
.amount-input-row .yen{ font-family: var(--font-num); font-size:20px; color: var(--ink-faint); }
.amount-input-row input{
  flex:1; border:none; font-family: var(--font-num); font-size:26px; font-weight:700;
  font-variant-numeric: tabular-nums;
}
.amount-input-row input:focus{ outline:none; }

.category-picker{ display:grid; grid-template-columns: repeat(4,1fr); gap:10px; }
.payment-picker{ display:flex; gap:10px; overflow-x:auto; padding-bottom:2px; scrollbar-width:none; }
.payment-picker::-webkit-scrollbar{ display:none; }
.cat-pick{
  display:flex; flex-direction:column; align-items:center; gap:6px;
  padding:10px 2px; border-radius: var(--radius-sm); border:1.5px solid transparent;
}
.cat-pick.pay-pick{ flex:none; min-width:64px; }
.cat-pick.selected{ border-color: var(--accent-2); background: var(--accent-tint); }
.cat-pick .cat-dot{ width:34px; height:34px; }
.cat-pick span.cat-name{ font-size:11.5px; color: var(--ink-soft); white-space:nowrap; }

.type-toggle{ display:flex; gap:8px; }
.type-opt{
  flex:1; padding:11px 0; border-radius: var(--radius-sm); border:1px solid var(--line);
  background: var(--card); font-size:14.5px; color: var(--ink-soft);
}
.type-opt.active{ background: var(--accent); border-color: var(--accent); color:#fff; }

.primary-btn{
  margin-top: 24px; width:100%; padding:15px 0; border-radius: var(--radius-md);
  background: var(--accent); color:#fff; font-size:16px; font-weight:600;
  box-shadow: 0 8px 18px rgba(61,90,128,.25);
}
.primary-btn:active{ transform: scale(.985); }
.primary-btn.ghost-btn{
  margin-top:14px; background: transparent; color: var(--accent); border:1.5px solid var(--accent-soft);
  box-shadow:none;
}

/* ---------------- Bills page ---------------- */
.search-bar{ margin-bottom: 10px; }
.filter-row{ display:flex; gap:8px; overflow-x:auto; padding-bottom: 4px; margin-bottom: 6px; scrollbar-width:none; }
.filter-row::-webkit-scrollbar{ display:none; }
.chip{
  flex:none; padding:8px 14px; border-radius:999px; background: var(--card);
  border:1px solid var(--line); font-size:13px; color: var(--ink-soft);
}
.chip.active{ background: var(--accent); border-color:var(--accent); color:#fff; }

/* ---------------- Stats page ---------------- */
.segment-toggle{ display:flex; gap:8px; margin-bottom:16px; }
.segment-opt{
  flex:1; padding:10px 0; border-radius: var(--radius-sm); background: var(--card);
  border:1px solid var(--line); font-size:14px; color: var(--ink-soft);
}
.segment-opt.active{ background: var(--accent); border-color:var(--accent); color:#fff; }
.chart-wrap{ margin: 6px 0 4px; position:relative; }
.legend-list{ display:flex; flex-direction:column; gap:10px; margin-top: 10px; }
.legend-row{ display:flex; align-items:center; gap:10px; font-size:13.5px; }
.legend-dot{ width:10px; height:10px; border-radius:50%; flex:none; }
.legend-name{ flex:1; color: var(--ink-soft); }
.legend-val{ font-family: var(--font-num); font-weight:600; }

/* ---------------- AI page ---------------- */
.ai-hero{ text-align:left; }
.ai-lead{ font-size: 15px; line-height:1.6; color: var(--ink); margin: 4px 0 0; }
.ai-cards{ display:flex; flex-direction:column; gap:12px; margin-top:6px; }
.ai-card{
  background: var(--card); border-radius: var(--radius-md); box-shadow: var(--shadow-card);
  padding: 16px 18px; border-left: 3px solid var(--accent-soft);
}
.ai-card.warn{ border-left-color: var(--warn); }
.ai-card.good{ border-left-color: var(--good); }
.ai-card h3{ margin:0 0 6px; font-size:14.5px; }
.ai-card p{ margin:0; font-size:13.5px; color: var(--ink-soft); line-height:1.55; }

/* ---------------- Settings ---------------- */
.settings-cat-list{ display:flex; flex-direction:column; gap:2px; }
.settings-cat-row{ display:flex; align-items:center; gap:12px; padding:10px 0; border-bottom:1px solid var(--line); }
.settings-cat-row:last-child{ border-bottom:none; }
.settings-cat-row .cat-dot{ width:30px; height:30px; }
.settings-cat-row .cat-name-full{ flex:1; font-size:14.5px; }
.del-cat-btn, .del-pay-btn{ color: var(--ink-faint); font-size:12px; padding:4px 8px; }
.add-cat-row{ display:flex; gap:8px; margin-top:12px; }
.add-cat-row .text-input{ flex:1; }
.new-item-form{ margin-top:12px; display:flex; flex-direction:column; gap:2px; }
.picker-caption{ font-size:12px; color: var(--ink-faint); margin: 12px 2px 6px; }
.icon-choice-row{ display:flex; gap:8px; flex-wrap:wrap; }
.icon-choice{
  width:38px; height:38px; border-radius:50%; flex:none;
  display:flex; align-items:center; justify-content:center; color:#fff;
  border:2px solid transparent; opacity:.55;
}
.icon-choice.selected{ opacity:1; border-color: var(--ink); transform: scale(1.08); }
.mini-btn.full{ width:100%; text-align:center; margin-top:14px; }
.mini-btn{ padding:11px 16px; border-radius: var(--radius-sm); background: var(--accent-tint); color: var(--accent); font-size:13.5px; font-weight:600; white-space:nowrap; }
.mini-btn.danger{ background: var(--warn-tint); color: var(--warn); }
.settings-actions{ display:flex; flex-direction:column; gap:10px; }
.row-between{ display:flex; align-items:center; justify-content:space-between; font-size:14.5px; }

.switch input{ display:none; }
.switch-track{
  width:46px; height:26px; border-radius:999px; background: var(--line-strong);
  display:inline-flex; align-items:center; padding:3px; transition: background .2s;
}
.switch-thumb{ width:20px; height:20px; border-radius:50%; background:#fff; box-shadow:0 1px 3px rgba(0,0,0,.25); transition: transform .2s; }
.switch input:checked + .switch-track{ background: var(--accent); }
.switch input:checked + .switch-track .switch-thumb{ transform: translateX(20px); }

/* ---------------- FAB ---------------- */
.fab{
  position: fixed; z-index: 30;
  right: calc(50% - 240px + 20px);
  bottom: calc(76px + env(safe-area-inset-bottom));
  width:56px; height:56px; border-radius:50%;
  background: linear-gradient(160deg, var(--accent-2), var(--accent));
  color:#fff; display:flex; align-items:center; justify-content:center;
  box-shadow: 0 10px 24px rgba(61,90,128,.4);
  transition: transform .15s ease;
}
.fab:active{ transform: scale(.92); }
@media (max-width: 480px){
  .fab{ right: 20px; }
}

/* ---------------- Tab bar ---------------- */
.tabbar{
  position: fixed; left:50%; transform: translateX(-50%);
  bottom:0; width:100%; max-width:480px; z-index: 25;
  background: color-mix(in srgb, var(--card) 92%, transparent);
  backdrop-filter: blur(10px);
  border-top:1px solid var(--line);
  display:flex; padding: 6px 4px calc(6px + env(safe-area-inset-bottom));
}
.tab-item{
  flex:1; display:flex; flex-direction:column; align-items:center; gap:3px;
  padding:6px 0 4px; color: var(--ink-faint); font-size:10.5px;
}
.tab-item.active{ color: var(--accent); }
.tab-item.center{ position:relative; }
.center-dot{
  width:6px; height:6px; border-radius:50%; background: transparent; margin-bottom: 14px;
}
.tab-item.center span:last-child{ margin-top:-10px; }

/* ---------------- Toast ---------------- */
.toast{
  position: fixed; left:50%; bottom: 110px; transform: translateX(-50%) translateY(16px);
  background: var(--ink); color: var(--paper); padding: 11px 20px; border-radius: 999px;
  font-size:13.5px; opacity:0; pointer-events:none; transition: all .25s ease; z-index:100;
  max-width: 88%; text-align:center;
}
.toast.show{ opacity:1; transform: translateX(-50%) translateY(0); }

/* ---------------- Reduced motion ---------------- */
@media (prefers-reduced-motion: reduce){
  *{ animation-duration: .001s !important; transition-duration: .001s !important; }
}