:root{
  --bg:#eef1ee;
  --surface:#ffffff;
  --surface-2:#e4e9e4;
  --ink:#16232b;
  --ink-dim:#576269;
  --line:rgba(22,35,43,0.12);
  --accent:#c98a2c;
  --accent-ink:#5c3d0f;
  --debt:#b5453b;
  --debt-bg:rgba(181,69,59,0.1);
  --savings:#2f7a63;
  --savings-bg:rgba(47,122,99,0.1);
  --shadow:0 1px 2px rgba(22,35,43,0.06), 0 4px 16px rgba(22,35,43,0.06);
  color-scheme:light;
}
@media (prefers-color-scheme: dark){
  :root{
    --bg:#0d1416;
    --surface:#161f21;
    --surface-2:#1d2729;
    --ink:#eef2f0;
    --ink-dim:#9aa8ac;
    --line:rgba(238,242,240,0.12);
    --accent:#e0a83e;
    --accent-ink:#2a1c07;
    --debt:#e0776b;
    --debt-bg:rgba(224,119,107,0.14);
    --savings:#4bb08f;
    --savings-bg:rgba(75,176,143,0.14);
    --shadow:0 1px 2px rgba(0,0,0,0.3), 0 4px 20px rgba(0,0,0,0.35);
    color-scheme:dark;
  }
}

*{box-sizing:border-box;}
html,body{height:100%;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:'Inter',system-ui,-apple-system,sans-serif;
  -webkit-tap-highlight-color:transparent;
}
h1,h2,h3{font-family:'Fraunces',Georgia,serif;}
.mono{font-family:'IBM Plex Mono',ui-monospace,monospace; font-variant-numeric:tabular-nums;}

/* ---- auth pages ---- */
.auth-page{display:flex; align-items:center; justify-content:center; min-height:100%; padding:24px;}
.auth-card{width:100%; max-width:380px; background:var(--surface); border-radius:16px; padding:26px 22px; box-shadow:var(--shadow);}
.auth-card h1{margin:0; font-size:26px;}
.auth-card .sub{margin:2px 0 18px; color:var(--ink-dim); font-size:14px;}
.auth-card .err{background:var(--debt-bg); color:var(--debt); padding:10px 12px; border-radius:9px; font-size:13px; margin-bottom:12px;}
.auth-card .switch{text-align:center; font-size:13px; color:var(--ink-dim); margin-top:16px;}
.auth-card a{color:var(--accent);}

/* ---- app shell ---- */
#app{display:flex; flex-direction:column; height:100%; max-width:560px; margin:0 auto; background:var(--bg);}
header.top{
  padding:14px 18px 12px; padding-top:calc(14px + env(safe-area-inset-top,0px));
  display:flex; align-items:baseline; justify-content:space-between;
  border-bottom:1px solid var(--line); position:sticky; top:0; background:var(--bg); z-index:5;
}
header.top h1{margin:0; font-size:22px; font-weight:600; letter-spacing:-0.01em;}
.linklike{background:none; border:none; color:var(--ink-dim); font-size:13px; cursor:pointer; font-family:inherit;}

main{flex:1; overflow-y:auto; padding:16px 16px calc(24px + env(safe-area-inset-bottom,0px)); -webkit-overflow-scrolling:touch;}
main .panel{display:none;}
main .panel.active{display:block; animation:fadein .18s ease;}
@keyframes fadein{from{opacity:0; transform:translateY(4px);} to{opacity:1; transform:none;}}

nav.tabs{
  display:flex; border-top:1px solid var(--line); background:var(--surface);
  padding-bottom:env(safe-area-inset-bottom,0px); position:sticky; bottom:0; z-index:5;
}
nav.tabs button{
  flex:1; background:none; border:none; padding:9px 2px 8px;
  display:flex; flex-direction:column; align-items:center; gap:3px;
  color:var(--ink-dim); font-family:inherit; font-size:11px; cursor:pointer;
}
nav.tabs button svg{width:20px; height:20px; stroke:currentColor; fill:none; stroke-width:1.6;}
nav.tabs button.active{color:var(--accent);}
nav.tabs button.active svg{stroke-width:2;}

.card{background:var(--surface); border-radius:14px; padding:16px; box-shadow:var(--shadow); margin-bottom:12px;}
.card h3{margin:0 0 10px; font-size:14px; font-weight:600; color:var(--ink-dim); text-transform:uppercase; letter-spacing:.04em;}
.grid2{display:grid; grid-template-columns:1fr 1fr; gap:10px;}
.stat{display:flex; flex-direction:column; gap:2px;}
.stat .label{font-size:11px; color:var(--ink-dim); text-transform:uppercase; letter-spacing:.04em;}
.stat .value{font-size:20px; font-weight:600;}

.bar{height:8px; border-radius:99px; background:var(--surface-2); overflow:hidden; margin-top:8px;}
.bar > div{height:100%; border-radius:99px; transition:width .4s ease;}
.bar.savings > div{background:var(--savings);}
.bar.debt > div{background:var(--debt);}

.pill{display:inline-flex; align-items:center; gap:5px; font-size:11px; font-weight:600; padding:3px 9px; border-radius:99px; text-transform:uppercase; letter-spacing:.03em;}
.pill.good{background:var(--savings-bg); color:var(--savings);}
.pill.bad{background:var(--debt-bg); color:var(--debt);}
.pill.neutral{background:var(--surface-2); color:var(--ink-dim);}

.row{display:flex; align-items:center; justify-content:space-between; gap:10px; padding:11px 0; border-bottom:1px solid var(--line);}
.row:last-child{border-bottom:none;}
.row .meta{display:flex; flex-direction:column; gap:2px; min-width:0;}
.row .meta .t{font-size:14px; font-weight:500; overflow:hidden; text-overflow:ellipsis; white-space:nowrap;}
.row .meta .s{font-size:12px; color:var(--ink-dim);}
.row .amt{font-size:14px; font-weight:600; flex-shrink:0;}
.row .amt.pos{color:var(--savings);}
.row .amt.neg{color:var(--debt);}
.row button.icon{background:none; border:none; padding:6px; color:var(--ink-dim); cursor:pointer; flex-shrink:0;}
.row button.icon svg{width:16px; height:16px; stroke:currentColor; fill:none; stroke-width:1.7;}

label{display:block; font-size:12px; color:var(--ink-dim); margin:10px 0 4px; text-transform:uppercase; letter-spacing:.03em;}
input, select{
  width:100%; background:var(--surface-2); border:1px solid var(--line); border-radius:9px;
  padding:10px 11px; font-size:15px; color:var(--ink); font-family:inherit;
}
input:focus, select:focus{outline:2px solid var(--accent); outline-offset:1px;}
.fieldrow{display:flex; gap:8px;}
.fieldrow > div{flex:1;}

button.btn{
  width:100%; background:var(--accent); color:var(--accent-ink); border:none; border-radius:10px;
  padding:12px; font-size:15px; font-weight:600; font-family:inherit; cursor:pointer; margin-top:12px;
}
button.btn:active{opacity:.85;}
button.btn.ghost{background:none; border:1px solid var(--line); color:var(--ink);}
button.btn.danger{background:var(--debt-bg); color:var(--debt);}

.empty{text-align:center; padding:30px 10px; color:var(--ink-dim); font-size:14px;}
.banner{background:var(--surface-2); border-radius:12px; padding:13px 14px; font-size:13px; color:var(--ink-dim); margin-bottom:12px; line-height:1.5;}
.banner b{color:var(--ink);}
.divider{margin:18px 0 12px; font-size:12px; color:var(--ink-dim); text-transform:uppercase; letter-spacing:.05em; display:flex; align-items:center; gap:8px;}
.divider::after{content:""; flex:1; height:1px; background:var(--line);}

.segmented{display:flex; background:var(--surface-2); border-radius:9px; padding:3px; gap:3px; margin-top:4px;}
.segmented button{flex:1; border:none; background:none; padding:8px; border-radius:7px; font-size:13px; font-family:inherit; color:var(--ink-dim); cursor:pointer;}
.segmented button.active{background:var(--surface); color:var(--ink); box-shadow:var(--shadow); font-weight:600;}

.invitebox{display:flex; align-items:center; gap:8px; margin-top:8px;}
.invitebox .code{font-family:'IBM Plex Mono',monospace; font-size:20px; letter-spacing:.12em; background:var(--surface-2); padding:8px 14px; border-radius:9px; flex:1; text-align:center;}
.invitebox button{background:var(--accent); color:var(--accent-ink); border:none; border-radius:9px; padding:0 14px; font-size:13px; font-weight:600; cursor:pointer;}

dialog{border:none; border-radius:16px; padding:0; width:min(92vw, 420px); background:var(--surface); color:var(--ink); box-shadow:var(--shadow);}
dialog::backdrop{background:rgba(13,20,22,0.5);}
dialog .dhead{padding:16px 18px 0; display:flex; justify-content:space-between; align-items:center;}
dialog .dhead h3{margin:0; font-size:16px; text-transform:none; color:var(--ink); font-weight:600;}
dialog .dbody{padding:0 18px 18px;}
dialog button.close{background:none; border:none; font-size:20px; color:var(--ink-dim); cursor:pointer; line-height:1;}

.toast{
  position:fixed; left:50%; bottom:calc(76px + env(safe-area-inset-bottom,0px)); transform:translateX(-50%);
  background:var(--ink); color:var(--bg); padding:9px 16px; border-radius:99px; font-size:13px;
  opacity:0; pointer-events:none; transition:opacity .25s ease, transform .25s ease; z-index:20; white-space:nowrap;
}
.toast.show{opacity:1; transform:translateX(-50%) translateY(-4px);}