:root{
  --bg:#0A0A0C;
  --card:#17171B;
  --card2:#1F1F24;
  --text:#F2F2F4;
  --text-dim:#8B8B93;
  --income:#34C759;
  --expense:#FF453A;
  --accent:#0A84FF;
  --border:#2A2A2F;
  --radius:16px;
  --safe-top: env(safe-area-inset-top);
  --safe-bottom: env(safe-area-inset-bottom);
}

*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  background:var(--bg);
  color:var(--text);
  font-family:-apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
  -webkit-tap-highlight-color:transparent;
  overscroll-behavior-y:none;
}

.app{
  max-width:520px;
  margin:0 auto;
  padding: calc(var(--safe-top) + 16px) 16px calc(var(--safe-bottom) + 100px);
  min-height:100vh;
}

.topbar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  margin-bottom:18px;
}
.topbar h1{
  font-size:22px;
  font-weight:700;
  margin:0;
}
.month-nav{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:15px;
  font-weight:600;
  color:var(--text-dim);
}
.icon-btn{
  background:var(--card);
  border:none;
  color:var(--text);
  width:30px;
  height:30px;
  border-radius:50%;
  font-size:18px;
  line-height:1;
  display:flex;
  align-items:center;
  justify-content:center;
}
.icon-btn:active{background:var(--card2);}

.summary{
  display:grid;
  grid-template-columns:1fr 1fr 1fr;
  gap:8px;
  margin-bottom:16px;
}
.summary-card{
  background:var(--card);
  border-radius:var(--radius);
  padding:12px 10px;
  display:flex;
  flex-direction:column;
  gap:4px;
}
.summary-card .label{
  font-size:12px;
  color:var(--text-dim);
  font-weight:600;
}
.summary-card .value{
  font-size:15px;
  font-weight:700;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.summary-card.income .value{color:var(--income);}
.summary-card.expense .value{color:var(--expense);}
.summary-card.balance .value{color:var(--accent);}

.filter-tabs{
  display:flex;
  gap:8px;
  margin-bottom:14px;
}
.tab{
  flex:1;
  background:var(--card);
  border:none;
  color:var(--text-dim);
  padding:9px 0;
  border-radius:10px;
  font-size:14px;
  font-weight:600;
}
.tab.active{
  background:var(--accent);
  color:#fff;
}

.category-breakdown{
  margin-bottom:8px;
  display:flex;
  flex-direction:column;
  gap:8px;
}
.category-breakdown:empty{margin-bottom:0;}
.cat-row{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:13px;
}
.cat-row .cat-name{
  width:78px;
  flex-shrink:0;
  color:var(--text-dim);
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
}
.cat-row .bar-track{
  flex:1;
  height:6px;
  background:var(--card);
  border-radius:3px;
  overflow:hidden;
}
.cat-row .bar-fill{
  height:100%;
  background:var(--expense);
  border-radius:3px;
}
.cat-row .cat-amount{
  flex-shrink:0;
  width:70px;
  text-align:right;
  color:var(--text-dim);
}

.tx-list{
  display:flex;
  flex-direction:column;
  gap:18px;
  margin-top:8px;
}
.tx-group .date-label{
  font-size:12px;
  font-weight:700;
  color:var(--text-dim);
  margin:0 0 8px 4px;
}
.tx-item{
  display:flex;
  align-items:center;
  justify-content:space-between;
  background:var(--card);
  padding:12px 14px;
  border-radius:14px;
  margin-bottom:8px;
}
.tx-item .tx-left{
  display:flex;
  flex-direction:column;
  gap:2px;
  overflow:hidden;
}
.tx-item .tx-category{
  font-size:14px;
  font-weight:600;
}
.tx-item .tx-memo{
  font-size:12px;
  color:var(--text-dim);
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
}
.tx-item .tx-amount{
  font-size:15px;
  font-weight:700;
  flex-shrink:0;
  padding-left:10px;
}
.tx-item .tx-amount.expense{color:var(--expense);}
.tx-item .tx-amount.income{color:var(--income);}

.empty-state{
  text-align:center;
  color:var(--text-dim);
  font-size:14px;
  line-height:1.6;
  margin-top:60px;
}

.fab{
  position:fixed;
  right:calc(16px + (100vw - 520px) / 2);
  bottom:calc(var(--safe-bottom) + 24px);
  width:56px;
  height:56px;
  border-radius:50%;
  background:var(--accent);
  color:#fff;
  border:none;
  font-size:28px;
  font-weight:400;
  box-shadow:0 6px 20px rgba(10,132,255,0.4);
  display:flex;
  align-items:center;
  justify-content:center;
}
@media (max-width:552px){
  .fab{ right:16px; }
}
.fab:active{transform:scale(0.95);}

.sheet-backdrop{
  position:fixed;
  inset:0;
  background:rgba(0,0,0,0.5);
  opacity:0;
  pointer-events:none;
  transition:opacity 0.25s ease;
  z-index:10;
}
.sheet-backdrop.visible{opacity:1;pointer-events:auto;}

.sheet{
  position:fixed;
  left:0;right:0;bottom:0;
  background:var(--card);
  border-radius:20px 20px 0 0;
  padding:10px 20px calc(var(--safe-bottom) + 20px);
  transform:translateY(100%);
  transition:transform 0.28s cubic-bezier(.32,.72,0,1);
  z-index:11;
  max-width:520px;
  margin:0 auto;
}
.sheet.visible{transform:translateY(0);}
.sheet-handle{
  width:36px;height:4px;
  background:var(--border);
  border-radius:2px;
  margin:6px auto 14px;
}

.type-toggle{
  display:flex;
  background:var(--card2);
  border-radius:10px;
  padding:3px;
  margin-bottom:18px;
}
.type-btn{
  flex:1;
  background:transparent;
  border:none;
  color:var(--text-dim);
  padding:9px 0;
  border-radius:8px;
  font-size:14px;
  font-weight:700;
}
.type-btn.active.expense{background:var(--expense);color:#fff;}
.type-btn.active.income{background:var(--income);color:#fff;}

.amount-row{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:6px;
  margin-bottom:20px;
}
.amount-row .won{
  font-size:26px;
  font-weight:700;
  color:var(--text-dim);
}
.amount-row input{
  background:transparent;
  border:none;
  color:var(--text);
  font-size:34px;
  font-weight:700;
  width:auto;
  max-width:220px;
  text-align:center;
}
.amount-row input:focus{outline:none;}

.field-group{margin-bottom:16px;}
.field-group label{
  display:block;
  font-size:12px;
  font-weight:600;
  color:var(--text-dim);
  margin-bottom:8px;
}
.chip-row{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
}
.chip{
  background:var(--card2);
  border:1px solid transparent;
  color:var(--text);
  padding:8px 14px;
  border-radius:20px;
  font-size:13px;
  font-weight:600;
}
.chip.active{
  background:var(--accent);
  border-color:var(--accent);
  color:#fff;
}

.two-col{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:12px;
}
.two-col input{
  width:100%;
  background:var(--card2);
  border:1px solid var(--border);
  color:var(--text);
  padding:10px 12px;
  border-radius:10px;
  font-size:14px;
}
input[type="date"]{color-scheme:dark;}

.sheet-actions{
  display:flex;
  gap:10px;
  margin-top:6px;
}
.btn-save, .btn-delete{
  flex:1;
  border:none;
  padding:14px 0;
  border-radius:12px;
  font-size:15px;
  font-weight:700;
}
.btn-save{
  background:var(--accent);
  color:#fff;
}
.btn-delete{
  background:var(--card2);
  color:var(--expense);
}