/* Bill Tracker — Banking/Traditional Finance palette (ui-ux-pro-max colors.csv)
   Light-only by design decision: owner specified white/light body + dark navy nav. */
:root{
  color-scheme: light;
  --bg:#F8FAFC; --card:#FFFFFF; --ink:#020617; --muted:#64748B; --line:#E2E8F0;
  --navy:#0F172A; --navy-2:#1E3A8A; --navy-ink:#FFFFFF; --navy-dim:#94A3B8;
  --green:#047857; --green-bg:#ECFDF5; --green-line:#A7F3D0;
  --amber:#A16207; --amber-bg:#FEFCE8; --amber-line:#FDE68A;
  --red:#DC2626; --red-bg:#FEF2F2; --red-line:#FECACA;
  --blue:#1E3A8A; --blue-bg:#EFF6FF; --blue-line:#BFDBFE;
  --r:10px; --r-lg:14px;
  --font:"IBM Plex Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  --nav-h:60px;
  --shadow:0 1px 2px rgba(2,6,23,.06), 0 1px 3px rgba(2,6,23,.04);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg); color:var(--ink); font-family:var(--font);
  font-size:16px; line-height:1.5; -webkit-font-smoothing:antialiased;
  padding-bottom:calc(var(--nav-h) + env(safe-area-inset-bottom));
}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
:focus-visible{outline:2px solid var(--navy-2);outline-offset:2px;border-radius:4px}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* ---------- shell ---------- */
.topbar{
  background:var(--navy); color:var(--navy-ink);
  padding:calc(12px + env(safe-area-inset-top)) 16px 12px;
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  position:sticky;top:0;z-index:5;
}
/* Text-only wordmark. IBM Plex Sans semibold (600) is already the page face. */
.topbar h1.brand{font-size:19px;font-weight:600;letter-spacing:-.015em;line-height:1.15}
.topbar .sub{font-size:12px;color:var(--navy-dim);font-weight:400;margin-top:1px}
.iconbtn{
  min-width:44px;min-height:44px;display:grid;place-items:center;
  border-radius:8px;color:inherit;transition:background .18s;
}
.iconbtn:hover{background:rgba(255,255,255,.12)}
.topbar .iconbtn.on{background:rgba(255,255,255,.18)}
main{max-width:860px;margin:0 auto;padding:16px 16px 24px}

/* ---------- bottom nav (≤5 items, UX guideline bottom-nav-limit) ---------- */
.botnav{
  position:fixed;left:0;right:0;bottom:0;z-index:6;
  background:var(--navy);
  display:grid;grid-template-columns:repeat(5,1fr);
  padding-bottom:env(safe-area-inset-bottom);
  border-top:1px solid rgba(255,255,255,.08);
}
.botnav a{
  min-height:var(--nav-h);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  color:var(--navy-dim);text-decoration:none;font-size:11px;font-weight:500;
  transition:color .18s;position:relative;
}
.botnav a[aria-current="page"]{color:#fff}
.botnav a[aria-current="page"]::before{
  content:"";position:absolute;top:0;left:22%;right:22%;height:2px;background:#fff;border-radius:0 0 2px 2px;
}
.botnav svg{width:21px;height:21px}

/* ---------- generic bits ---------- */
.sec{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:22px 0 10px}
.sec:first-child{margin-top:4px}
.sec h2{font-size:13px;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.04em}
.sec .link{color:var(--navy-2);font-weight:600;font-size:14px;min-height:44px;display:flex;align-items:center}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--shadow)}
.pad{padding:16px}

/* stat strip — a row of measured figures, not a card grid */
.stats{background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--shadow);overflow:hidden}
.stat{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:13px 16px;border-top:1px solid var(--line)}
.stat:first-child{border-top:0}
.stat .k{font-size:14px;color:var(--muted);display:flex;align-items:center;gap:9px;min-width:0}
.stat .k .dot{width:8px;height:8px;border-radius:2px;flex:none}
.stat .v{font-size:17px;font-weight:600;letter-spacing:-.01em;white-space:nowrap}
.stat .v small{display:block;font-size:12px;font-weight:400;color:var(--muted);text-align:right;letter-spacing:0}
.stat.hero{padding:18px 16px}
.stat.hero .v{font-size:26px;font-weight:700;letter-spacing:-.02em}
.v.green{color:var(--green)} .v.amber{color:var(--amber)} .v.red{color:var(--red)}

/* ---------- list rows (responsive "table": card rows, never an overflowing table) ---------- */
.list{background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--shadow)}
.row{
  display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:12px;
  padding:12px 14px;border-top:1px solid var(--line);width:100%;text-align:left;
  transition:background .18s;
}
.row:first-child{border-top:0}
button.row:hover{background:#F1F5F9}
.row .tick{
  width:30px;height:30px;min-width:30px;border-radius:50%;border:1.75px solid var(--line);
  display:grid;place-items:center;color:transparent;flex:none;transition:all .18s;background:#fff;
}
.row .tick svg{width:15px;height:15px}
.row.is-paid .tick{background:var(--green);border-color:var(--green);color:#fff}
.row.is-overdue .tick{border-color:var(--red)}
.row.is-due .tick{border-color:var(--amber)}
.row .who{min-width:0}
.row .nm{font-weight:600;font-size:15px;letter-spacing:-.005em;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.row .mt{font-size:13px;color:var(--muted);margin-top:2px;display:flex;flex-wrap:wrap;gap:6px;align-items:center}
.row .amt{text-align:right;font-weight:600;font-size:16px;white-space:nowrap}
.row .amt small{display:block;font-size:12px;font-weight:400;color:var(--muted)}
.row.is-paid .nm{color:var(--muted)}

/* status pills */
.pill{
  display:inline-flex;align-items:center;gap:5px;font-size:11.5px;font-weight:600;
  padding:2px 8px;border-radius:999px;border:1px solid;letter-spacing:.01em;white-space:nowrap;
}
.pill.paid{color:var(--green);background:var(--green-bg);border-color:var(--green-line)}
.pill.due{color:var(--amber);background:var(--amber-bg);border-color:var(--amber-line)}
.pill.review{color:var(--amber);background:var(--amber-bg);border-color:var(--amber-line)}
.pill.overdue{color:var(--red);background:var(--red-bg);border-color:var(--red-line)}
.pill.autopay{color:var(--blue);background:var(--blue-bg);border-color:var(--blue-line)}
.pill.neutral{color:var(--muted);background:#F1F5F9;border-color:var(--line)}

/* ---------- empty states: one line, one button, no fake data ---------- */
.empty{padding:30px 20px;text-align:center}
.empty p{color:var(--muted);font-size:14px;max-width:34ch;margin:0 auto 14px}
.empty .tagline{color:var(--ink);font-size:19px;font-weight:600;letter-spacing:-.015em;line-height:1.3;margin-bottom:12px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:11px 18px;border-radius:var(--r);font-weight:600;font-size:15px;
  background:var(--navy);color:#fff;transition:background .18s;border:1px solid var(--navy);
}
.btn:hover{background:#1E293B}
.btn.ghost{background:#fff;color:var(--ink);border-color:var(--line)}
.btn.ghost:hover{background:#F1F5F9}
.btn.danger{background:#fff;color:var(--red);border-color:var(--red-line)}
.btn.danger:hover{background:var(--red-bg)}
.btn.sm{min-height:36px;padding:7px 12px;font-size:13.5px;border-radius:8px}
.btn[disabled]{opacity:.5;cursor:not-allowed}
.btn svg{width:17px;height:17px}

/* ---------- attention banners ---------- */
.alerts{display:grid;gap:8px;margin-bottom:16px}
.alert{
  display:flex;gap:10px;align-items:flex-start;padding:11px 13px;border-radius:var(--r);
  border:1px solid;font-size:13.5px;line-height:1.45;
}
.alert svg{width:17px;height:17px;flex:none;margin-top:1px}
.alert.warn{background:var(--amber-bg);border-color:var(--amber-line);color:#713F12}
.alert.bad{background:var(--red-bg);border-color:var(--red-line);color:#7F1D1D}
.alert.info{background:var(--blue-bg);border-color:var(--blue-line);color:#1E3A8A}
.alert b{font-weight:600}
.alert a{color:inherit;font-weight:600}

/* ---------- forms / modal ---------- */
.ov{position:fixed;inset:0;background:rgba(2,6,23,.5);display:none;align-items:flex-end;justify-content:center;z-index:20}
.ov.on{display:flex}
.sheet{
  background:var(--card);width:100%;max-width:560px;border-radius:16px 16px 0 0;
  padding:18px 18px calc(24px + env(safe-area-inset-bottom));max-height:92vh;overflow:auto;
}
.sheet h3{font-size:18px;font-weight:600;letter-spacing:-.01em;margin-bottom:4px}
.sheet .hint{font-size:13px;color:var(--muted);margin-bottom:16px}
.f{display:grid;gap:14px}
.f label{display:grid;gap:5px;font-size:13px;font-weight:600;color:#334155}
.f .req::after{content:" *";color:var(--red)}
.f input,.f select,.f textarea{
  padding:11px 12px;border:1px solid #CBD5E1;border-radius:9px;background:#fff;width:100%;
  font-size:16px; /* 16px prevents iOS zoom-on-focus */
}
.f textarea{min-height:72px;resize:vertical}
.f .two{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.f .help{font-size:12px;color:var(--muted);font-weight:400}
.f .err{font-size:12.5px;color:var(--red);font-weight:600}
.f .check{display:flex;align-items:center;gap:10px;font-size:14px;font-weight:600;min-height:44px}
.f .check input{width:20px;height:20px;flex:none}
.acts{display:flex;gap:10px;margin-top:20px;align-items:center}
.acts .grow{flex:1}
.acts .push{margin-right:auto}

/* ---------- comparison table (cPort) — scrolls in its own container ---------- */
.tblwrap{overflow-x:auto;-webkit-overflow-scrolling:touch;border-radius:var(--r-lg)}
table.cmp{width:100%;min-width:560px;border-collapse:collapse;background:var(--card);font-size:13.5px}
table.cmp th,table.cmp td{padding:10px 12px;text-align:left;border-top:1px solid var(--line);white-space:nowrap}
table.cmp thead th{
  background:#F1F5F9;font-size:11.5px;text-transform:uppercase;letter-spacing:.04em;
  color:var(--muted);font-weight:600;border-top:0;
}
table.cmp td.n{text-align:right;font-variant-numeric:tabular-nums}
table.cmp th.n{text-align:right}
table.cmp tbody tr:hover{background:#F8FAFC}

/* ---------- misc ---------- */
.toast{
  position:fixed;left:50%;transform:translateX(-50%);bottom:calc(var(--nav-h) + 16px + env(safe-area-inset-bottom));
  background:var(--navy);color:#fff;padding:10px 16px;border-radius:9px;font-size:14px;font-weight:500;
  opacity:0;pointer-events:none;transition:opacity .2s;z-index:30;max-width:90vw;text-align:center;
}
.toast.on{opacity:1}
.filters{display:flex;gap:8px;overflow-x:auto;padding-bottom:4px;margin-bottom:12px;-webkit-overflow-scrolling:touch}
.chip{
  padding:7px 13px;border-radius:999px;border:1px solid var(--line);background:#fff;
  font-size:13.5px;font-weight:500;white-space:nowrap;min-height:38px;transition:all .18s;
}
.chip[aria-pressed="true"]{background:var(--navy);color:#fff;border-color:var(--navy)}
.drop{
  border:1.75px dashed #CBD5E1;border-radius:var(--r-lg);padding:26px 18px;text-align:center;background:#fff;
  transition:all .18s;
}
.drop.over{border-color:var(--navy-2);background:var(--blue-bg)}
.drop p{color:var(--muted);font-size:14px;margin-bottom:14px}
.note{font-size:12.5px;color:var(--muted);margin-top:10px;line-height:1.5}
.grp{font-size:12px;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:.04em;padding:10px 14px 6px;background:#F8FAFC;border-top:1px solid var(--line)}
.row:first-child + .grp, .grp:first-child{border-top:0}
.bar{height:8px;background:#E2E8F0;border-radius:5px;overflow:hidden;display:flex;margin:12px 16px 16px}
.bar i{display:block;height:100%}
.spin{display:inline-block;width:15px;height:15px;border:2px solid rgba(255,255,255,.35);border-top-color:#fff;border-radius:50%;animation:sp .7s linear infinite}
@keyframes sp{to{transform:rotate(360deg)}}

@media (min-width:780px){
  .f .two{grid-template-columns:1fr 1fr}
  .ov{align-items:center}
  .sheet{border-radius:16px;padding-bottom:24px}
}
@media (prefers-reduced-motion: reduce){
  *{transition:none !important;animation:none !important}
  html{scroll-behavior:auto}
}