:root{
  --bg:#eef1f6; --surface:#ffffff; --surface-2:#f6f8fb; --border:#dde2ea;
  --ink:#111726; --muted:#5b6577; --faint:#8b95a6;
  --accent:#2f5bea; --accent-soft:#e7edfe;
  --profit:#0f8a5f; --loss:#c8402f; --warn:#b7791f;
  --profit-soft:#e3f4ec; --loss-soft:#fbe8e5; --warn-soft:#faf0dd;
  --shadow:0 1px 2px rgba(17,23,38,.04),0 8px 24px -12px rgba(17,23,38,.18);
  --radius:14px;
  --mono:ui-monospace,"SF Mono",SFMono-Regular,Menlo,Consolas,monospace;
  --ui:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
@media (prefers-color-scheme:dark){
  :root{
    --bg:#0d1220; --surface:#141b2b; --surface-2:#1a2233; --border:#28324a;
    --ink:#e9edf5; --muted:#9aa5b8; --faint:#697389;
    --accent:#6a8bff; --accent-soft:#1c2745;
    --profit:#43c58c; --loss:#f0715f; --warn:#e0a83f;
    --profit-soft:#122a22; --loss-soft:#2c1613; --warn-soft:#2a2010;
    --shadow:0 1px 2px rgba(0,0,0,.3),0 12px 30px -14px rgba(0,0,0,.6);
  }
}
:root[data-theme="light"]{
  --bg:#eef1f6; --surface:#ffffff; --surface-2:#f6f8fb; --border:#dde2ea;
  --ink:#111726; --muted:#5b6577; --faint:#8b95a6;
  --accent:#2f5bea; --accent-soft:#e7edfe;
  --profit:#0f8a5f; --loss:#c8402f; --warn:#b7791f;
  --profit-soft:#e3f4ec; --loss-soft:#fbe8e5; --warn-soft:#faf0dd;
  --shadow:0 1px 2px rgba(17,23,38,.04),0 8px 24px -12px rgba(17,23,38,.18);
}
:root[data-theme="dark"]{
  --bg:#0d1220; --surface:#141b2b; --surface-2:#1a2233; --border:#28324a;
  --ink:#e9edf5; --muted:#9aa5b8; --faint:#697389;
  --accent:#6a8bff; --accent-soft:#1c2745;
  --profit:#43c58c; --loss:#f0715f; --warn:#e0a83f;
  --profit-soft:#122a22; --loss-soft:#2c1613; --warn-soft:#2a2010;
  --shadow:0 1px 2px rgba(0,0,0,.3),0 12px 30px -14px rgba(0,0,0,.6);
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--ui);
  line-height:1.45;-webkit-font-smoothing:antialiased;font-size:14px}
.wrap{max-width:1120px;margin:0 auto;padding:22px 18px 60px}
a{color:var(--accent)}
.num{font-family:var(--mono);font-variant-numeric:tabular-nums}

/* Header */
header{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:14px;margin-bottom:20px}
.brand h1{font-size:20px;margin:0;letter-spacing:-.02em;font-weight:650}
.brand p{margin:3px 0 0;color:var(--muted);font-size:13px;max-width:52ch}
.tag{display:inline-block;font-size:10.5px;text-transform:uppercase;letter-spacing:.09em;
  color:var(--accent);background:var(--accent-soft);padding:3px 8px;border-radius:20px;font-weight:600;margin-bottom:8px}

.grid{display:grid;grid-template-columns:1fr 400px;gap:18px;align-items:start}
@media(max-width:880px){.grid{grid-template-columns:1fr}}

/* Cards */
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:16px 16px 6px;box-shadow:var(--shadow);margin-bottom:16px}
.card > h2{font-size:12px;text-transform:uppercase;letter-spacing:.07em;color:var(--muted);
  margin:0 0 2px;font-weight:600;display:flex;align-items:center;gap:8px}
.card > .sub{color:var(--faint);font-size:12px;margin:0 0 12px}
.muted-note{font-weight:400;color:var(--faint);text-transform:none;letter-spacing:0}

.row{display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:9px 0;border-bottom:1px solid var(--border)}
.row:last-child{border-bottom:none}
.row label{color:var(--ink);font-size:13px;flex:1}
.row label small{display:block;color:var(--faint);font-size:11px;margin-top:1px;font-weight:400}
.field{display:flex;align-items:center;gap:6px;background:var(--surface-2);
  border:1px solid var(--border);border-radius:9px;padding:0 9px;height:36px;min-width:118px}
.field:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.field .unit{color:var(--faint);font-size:12px;font-family:var(--mono)}
.field input{border:none;background:none;color:var(--ink);font-family:var(--mono);
  font-variant-numeric:tabular-nums;font-size:14px;width:100%;text-align:right;outline:none;padding:0;min-width:0}
.field input::-webkit-outer-spin-button,.field input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0}
.field input[type=number]{-moz-appearance:textfield}

/* Segmented control */
.seg{display:inline-flex;background:var(--surface-2);border:1px solid var(--border);border-radius:9px;padding:3px;gap:3px}
.seg button{border:none;background:none;color:var(--muted);font-family:var(--ui);font-size:12.5px;
  font-weight:550;padding:6px 12px;border-radius:6px;cursor:pointer}
.seg button[aria-pressed="true"]{background:var(--accent);color:#fff}
.seg button:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

/* Result panel */
.result{position:sticky;top:16px}
@media(max-width:880px){.result{position:static}}
.hero{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:18px;margin-bottom:16px}
.hero .lbl{font-size:11px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);font-weight:600}
.net{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:38px;font-weight:600;
  letter-spacing:-.02em;margin:6px 0 2px;line-height:1}
.net.pos{color:var(--profit)} .net.neg{color:var(--loss)}
.net-try{font-family:var(--mono);color:var(--muted);font-size:14px}
.pill{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:600;
  padding:4px 10px;border-radius:20px;margin-top:10px}
.pill.pos{background:var(--profit-soft);color:var(--profit)}
.pill.neg{background:var(--loss-soft);color:var(--loss)}
.pill.warn{background:var(--warn-soft);color:var(--warn)}

.metrics{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:16px}
.metric{background:var(--surface-2);border:1px solid var(--border);border-radius:10px;padding:11px 12px}
.metric .k{font-size:10.5px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);font-weight:600}
.metric .v{font-family:var(--mono);font-variant-numeric:tabular-nums;font-size:19px;margin-top:4px;font-weight:550}
.metric .h{font-size:11px;color:var(--faint);margin-top:2px}

/* Waterfall */
.flow{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:14px 16px}
.flow h2{font-size:12px;text-transform:uppercase;letter-spacing:.07em;color:var(--muted);margin:0 0 8px;font-weight:600}
.flow .f{display:flex;align-items:center;justify-content:space-between;padding:6px 0;font-size:13px;border-bottom:1px dashed var(--border)}
.flow .f:last-child{border-bottom:none}
.flow .f .fn{color:var(--muted);display:flex;align-items:center;gap:8px}
.flow .f .fv{font-family:var(--mono);font-variant-numeric:tabular-nums}
.flow .f.rev .fv{color:var(--ink);font-weight:600}
.flow .f.cost .fv{color:var(--loss)}
.flow .f.total{margin-top:4px;padding-top:10px;border-top:2px solid var(--border);border-bottom:none;font-weight:600}
.flow .f.total .fn{color:var(--ink)}
.bar{width:6px;height:16px;border-radius:3px;flex:0 0 auto}

.insight{border-radius:12px;padding:12px 14px;margin-top:16px;font-size:12.5px;line-height:1.5;border:1px solid transparent}
.insight.warn{background:var(--warn-soft);border-color:color-mix(in srgb,var(--warn) 30%,transparent);color:var(--ink)}
.insight.good{background:var(--profit-soft);border-color:color-mix(in srgb,var(--profit) 30%,transparent);color:var(--ink)}
.insight.bad{background:var(--loss-soft);border-color:color-mix(in srgb,var(--loss) 30%,transparent);color:var(--ink)}
.insight b{color:var(--ink)}

footer{margin-top:26px;color:var(--faint);font-size:11.5px;line-height:1.6;max-width:80ch}
footer code{font-family:var(--mono);background:var(--surface-2);padding:1px 5px;border-radius:4px}
.theme-btn{border:1px solid var(--border);background:var(--surface);color:var(--muted);
  border-radius:8px;height:34px;padding:0 12px;cursor:pointer;font-family:var(--ui);font-size:12.5px}
.theme-btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}