@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;600;700&family=Inter:wght@400;500;600&family=IBM+Plex+Mono:wght@400;500&display=swap');

:root{
  --bg:#FAFAF6;
  --ink:#1C1C19;
  --muted:#8C8876;
  --line:#E4E1D6;
  --teal:#1F6F5C;
  --teal-bg:#E9F2EE;
  --rust:#B3452C;
  --rust-bg:#FAEDE8;
  --card:#FFFFFF;
}

*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  background:var(--bg);
  color:var(--ink);
  font-family:'Inter',sans-serif;
  line-height:1.45;
  -webkit-font-smoothing:antialiased;
  -webkit-tap-highlight-color:transparent;
  touch-action:manipulation;
}
button, input{touch-action:manipulation;}

.wrap{
  max-width:480px;
  margin:0 auto;
  padding:24px 18px calc(48px + env(safe-area-inset-bottom));
}

.langbar{
  display:flex;
  justify-content:flex-end;
  gap:6px;
  margin-bottom:20px;
}
.lang-btn{
  font-family:'IBM Plex Mono',monospace;
  font-size:12px;
  letter-spacing:0.06em;
  border:1px solid var(--line);
  background:var(--card);
  color:var(--muted);
  padding:8px 14px;
  min-height:36px;
  border-radius:100px;
  cursor:pointer;
}
.lang-btn.active{
  background:var(--ink);
  color:var(--bg);
  border-color:var(--ink);
}
.lang-btn:active{transform:scale(0.96);}

header.top{
  margin-bottom:26px;
}
header.top h1{
  font-family:'Space Grotesk',sans-serif;
  font-weight:700;
  font-size:26px;
  letter-spacing:-0.01em;
  margin:0 0 6px;
}
header.top p{
  margin:0;
  color:var(--muted);
  font-size:13.5px;
}

.eyebrow{
  font-family:'IBM Plex Mono',monospace;
  font-size:11px;
  letter-spacing:0.12em;
  text-transform:uppercase;
  color:var(--muted);
  margin:0 0 12px;
  display:flex;
  align-items:center;
  gap:8px;
}
.eyebrow::after{
  content:'';
  flex:1;
  height:1px;
  background:var(--line);
}

section{margin-bottom:28px;}

/* column header */
.col-header{
  display:flex;
  align-items:center;
  gap:8px;
  padding:0 4px 8px;
  font-family:'IBM Plex Mono',monospace;
  font-size:10px;
  letter-spacing:0.08em;
  text-transform:uppercase;
  color:var(--muted);
}
.col-header .c-name{flex:1; text-align:center;}
.col-header .c-amt{width:104px; text-align:right;}
.col-header .c-sp{width:34px;}

/* person rows */
.people-list{
  display:flex;
  flex-direction:column;
  gap:10px;
}
.person-row{
  display:flex;
  align-items:center;
  gap:8px;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:14px;
  padding:6px 6px 6px 12px;
  min-height:56px;
}
.person-row input.name{
  flex:1;
  text-align:center;
  font-family:'Inter',sans-serif;
  font-weight:500;
  font-size:16px;
  border:none;
  outline:none;
  background:transparent;
  color:var(--ink);
  min-width:0;
}
.person-row input.name::placeholder{color:#C8C4B4; font-weight:400;}

.amt-wrap{
  position:relative;
  width:100px;
  flex-shrink:0;
}
.person-row input.amount{
  width:100%;
  text-align:right;
  font-family:'IBM Plex Mono',monospace;
  font-size:16px;
  border:1px solid var(--line);
  border-radius:9px;
  padding:10px 10px;
  outline:none;
  background:var(--bg);
  color:var(--ink);
  -moz-appearance:textfield;
}
.person-row input.amount::-webkit-outer-spin-button,
.person-row input.amount::-webkit-inner-spin-button{
  -webkit-appearance:none;
  margin:0;
}
.person-row input.amount:focus{border-color:var(--ink);}

.person-row .del{
  border:none;
  background:none;
  color:var(--muted);
  font-size:16px;
  cursor:pointer;
  width:38px;
  height:38px;
  border-radius:50%;
  flex-shrink:0;
  display:flex;
  align-items:center;
  justify-content:center;
}
.person-row .del:active{background:var(--rust-bg); color:var(--rust);}

.add-person-btn{
  margin-top:12px;
  width:100%;
  display:flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  border:1.5px dashed var(--line);
  background:transparent;
  color:var(--muted);
  font-family:'Inter',sans-serif;
  font-weight:500;
  font-size:15px;
  min-height:52px;
  padding:13px;
  border-radius:14px;
  cursor:pointer;
}
.add-person-btn:active{border-color:var(--ink); color:var(--ink); background:var(--card);}
.add-person-btn .plus{
  font-size:19px;
  line-height:1;
}

.empty{
  color:var(--muted);
  font-size:13.5px;
  padding:8px 4px;
}

/* balances */
.ledger{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:14px;
  padding:4px 16px;
}
.balance-row{
  display:flex;
  justify-content:space-between;
  align-items:baseline;
  padding:14px 0;
  border-bottom:1px solid var(--line);
}
.balance-row:last-child{border-bottom:none;}
.balance-name{font-weight:500;font-size:14.5px;}
.balance-amount{
  font-family:'IBM Plex Mono',monospace;
  font-size:14.5px;
  font-weight:500;
}
.pos{color:var(--teal);}
.neg{color:var(--rust);}
.zero{color:var(--muted);}

.ledger-line{
  display:grid;
  grid-template-columns:1fr auto 1fr auto;
  align-items:center;
  gap:10px;
  padding:14px 0;
  border-bottom:1px dashed var(--line);
}
.ledger-line:last-child{border-bottom:none;}
.lg-from{text-align:right; font-weight:500; font-size:14px;}
.lg-arrow{color:var(--muted); font-size:13px;}
.lg-to{font-weight:500; font-size:14px;}
.lg-amount{
  font-family:'IBM Plex Mono',monospace;
  font-size:14px;
  font-weight:600;
  color:var(--ink);
  background:var(--teal-bg);
  padding:4px 10px;
  border-radius:100px;
  text-align:center;
  white-space:nowrap;
}
.settled{
  text-align:center;
  padding:24px 0;
  color:var(--teal);
  font-weight:600;
  font-size:15px;
}
.settled span{display:block; font-size:22px; margin-bottom:6px;}

.total-line{
  display:flex;
  justify-content:space-between;
  font-family:'IBM Plex Mono',monospace;
  font-size:13px;
  color:var(--muted);
  margin-top:10px;
  padding:0 4px;
}
.total-line b{color:var(--ink); font-weight:600;}

@media (max-width:480px){
  .wrap{padding:28px 16px 60px;}
  header.top h1{font-size:25px;}
  .col-header .c-amt{width:96px;}
  .amt-wrap{width:96px;}
  .ledger-line{grid-template-columns:1fr;text-align:left;gap:4px;}
  .lg-from{text-align:left;}
  .lg-amount{justify-self:start;}
}