:root {
  --bg: #f4f6f9;
  --surface: #ffffff;
  --surface-2: #f0f3f7;
  --border: #e2e7ee;
  --text: #121a26;
  --muted: #5d6b7e;
  --faint: #8a96a8;
  --accent: #0f766e;
  --accent-soft: #e2f4f1;
  --tax: #c2410c;
  --tax-soft: #fdeee4;
  --ss: #a16207;
  --ss-soft: #fdf4dc;
  --good: #15803d;
  --good-soft: #e5f6ea;
  --radius: 16px;
  --shadow: 0 1px 2px rgb(16 24 40 / 0.05), 0 4px 16px rgb(16 24 40 / 0.04);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --surface: #151b24;
    --surface-2: #1c2430;
    --border: #263040;
    --text: #e8edf4;
    --muted: #9aa7b8;
    --faint: #6b7889;
    --accent: #2dd4bf;
    --accent-soft: #10302c;
    --tax: #fb923c;
    --tax-soft: #33200f;
    --ss: #facc15;
    --ss-soft: #2e2810;
    --good: #4ade80;
    --good-soft: #10291a;
    --shadow: none;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'IBM Plex Sans Arabic', system-ui, sans-serif;
  font-size: 15px;
  line-height: 1.6;
}

[hidden] { display: none !important; }

.num { font-variant-numeric: tabular-nums; direction: ltr; unicode-bidi: isolate; }

/* ── Layout ─────────────────────────────────────────── */
header {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.header-inner, main { max-width: 560px; margin: 0 auto; padding: 0 16px; }
.header-inner { display: flex; align-items: center; gap: 10px; height: 56px; }
.logo {
  display: grid; place-items: center; width: 32px; height: 32px; border-radius: 10px;
  background: var(--accent); color: var(--surface); font-weight: 700;
}
h1 { margin: 0; font-size: 17px; font-weight: 700; }
main { padding-top: 16px; padding-bottom: calc(96px + env(safe-area-inset-bottom)); }

nav.tabs {
  position: fixed; inset-inline: 0; bottom: 0; z-index: 10;
  display: flex; justify-content: center; gap: 8px;
  padding: 8px 16px calc(8px + env(safe-area-inset-bottom));
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  backdrop-filter: blur(12px);
  border-top: 1px solid var(--border);
}
nav.tabs button {
  flex: 1; max-width: 200px; padding: 10px; border: 0; border-radius: 12px;
  background: transparent; color: var(--muted); font: inherit; font-weight: 600; cursor: pointer;
}
nav.tabs button[aria-selected="true"] { background: var(--accent-soft); color: var(--accent); }

/* ── Cards ──────────────────────────────────────────── */
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 18px; margin-bottom: 14px;
}
.card h2 { margin: 0 0 12px; font-size: 15px; font-weight: 700; }
.card h3 { margin: 18px 0 8px; font-size: 13px; font-weight: 700; color: var(--muted); }
.hint { margin: 6px 0 0; font-size: 12.5px; color: var(--faint); }

/* ── Form ───────────────────────────────────────────── */
.field + .field { margin-top: 16px; }
label, .label { display: block; margin-bottom: 6px; font-size: 13px; font-weight: 600; color: var(--muted); }
input[type="text"], select {
  width: 100%; height: 48px; padding: 0 14px;
  border: 1px solid var(--border); border-radius: 12px;
  background: var(--surface-2); color: var(--text); font: inherit; font-size: 16px;
}
input[type="text"] { font-size: 20px; font-weight: 600; }
input:focus, select:focus { outline: 2px solid var(--accent); outline-offset: 1px; }

.stepper { display: flex; align-items: center; gap: 10px; }
.stepper button {
  width: 44px; height: 44px; border: 1px solid var(--border); border-radius: 12px;
  background: var(--surface-2); color: var(--text); font-size: 20px; cursor: pointer;
}
.stepper output { min-width: 32px; text-align: center; font-size: 18px; font-weight: 700; }

.switch-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.switch-row .label { margin: 0; color: var(--text); font-size: 14px; }
.switch { position: relative; width: 48px; height: 28px; flex-shrink: 0; }
.switch input { position: absolute; inset: 0; opacity: 0; margin: 0; cursor: pointer; }
.switch span {
  position: absolute; inset: 0; border-radius: 999px; background: var(--border); transition: background .15s;
  pointer-events: none;
}
.switch span::after {
  content: ''; position: absolute; top: 3px; inset-inline-start: 3px; width: 22px; height: 22px;
  border-radius: 50%; background: #fff; transition: transform .15s; box-shadow: 0 1px 3px rgb(0 0 0 / .25);
}
.switch input:checked + span { background: var(--accent); }
.switch input:checked + span::after { transform: translateX(-20px); }
.switch input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: 2px; }

details.more { margin-top: 16px; border-top: 1px dashed var(--border); padding-top: 12px; }
details.more summary { cursor: pointer; font-size: 13px; font-weight: 600; color: var(--accent); }
details.more[open] summary { margin-bottom: 12px; }

/* ── Results ────────────────────────────────────────── */
.hero { background: var(--accent-soft); border-color: transparent; }
.hero .label { color: var(--accent); }
.hero .big { font-size: 38px; font-weight: 700; line-height: 1.2; color: var(--text); }
.hero .big small { font-size: 14px; font-weight: 500; color: var(--muted); margin-inline-start: 6px; }
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-top: 16px; }
.stat { background: var(--surface); border-radius: 12px; padding: 10px 8px; text-align: center; }
.stat p { margin: 0; font-size: 11.5px; color: var(--muted); }
.stat strong { display: block; margin-top: 2px; font-size: 15px; }

.rows { margin: 0; padding: 0; list-style: none; }
.rows li { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; padding: 7px 0; }
.rows li span:first-child { color: var(--muted); }
.rows li.total { border-top: 1px solid var(--border); margin-top: 4px; padding-top: 10px; font-weight: 700; }
.rows li.total span:first-child { color: var(--text); }
.rows .sub { display: block; font-size: 12px; color: var(--faint); }
.rows .sub.num { text-align: right; }
.minus-tax { color: var(--tax); }
.minus-ss { color: var(--ss); }
.minus-ok { color: var(--good); }

.brackets { display: grid; gap: 6px; }
.bracket {
  display: flex; justify-content: space-between; align-items: center; gap: 12px;
  padding: 10px 12px; border-radius: 10px; background: var(--surface-2);
}
.bracket.empty { opacity: .45; }
.bracket p { margin: 0; font-size: 13.5px; }
.bracket .sub { font-size: 12px; color: var(--faint); }
.rate { font-weight: 700; color: var(--tax); }

.callout {
  border-radius: 12px; padding: 12px 14px; font-size: 13.5px;
  background: var(--surface-2); color: var(--muted);
}
.callout.good { background: var(--good-soft); color: var(--good); }

/* ── Extra income ───────────────────────────────────── */
.seg { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.seg button {
  display: grid; gap: 2px; padding: 10px; border: 1px solid var(--border); border-radius: 12px;
  background: var(--surface-2); color: var(--muted); font: inherit; font-size: 12.5px; cursor: pointer;
}
.seg button strong { font-size: 20px; color: var(--text); }
.seg button[aria-checked="true"] { border-color: var(--accent); background: var(--accent-soft); color: var(--accent); }
.seg button[aria-checked="true"] strong { color: var(--accent); }

.saved {
  display: flex; align-items: center; justify-content: space-between; gap: 10px; flex-wrap: wrap;
  margin-top: 14px; padding: 12px 14px; border-radius: 12px; background: var(--surface-2);
}
.saved p { margin: 0; font-size: 13.5px; color: var(--muted); }
.saved p strong { color: var(--text); }
.saved .actions { display: flex; gap: 8px; }
.btn {
  height: 38px; padding: 0 14px; border: 0; border-radius: 10px;
  background: var(--accent); color: var(--surface); font: inherit; font-size: 13.5px; font-weight: 600; cursor: pointer;
}
.btn.ghost { background: transparent; color: var(--muted); border: 1px solid var(--border); }
#extra-result .rows { margin-top: 12px; }
.saved + .field { margin-top: 16px; }

/* ── Law page ───────────────────────────────────────── */
.law p, .law li { color: var(--muted); }
.law strong { color: var(--text); }
.law ul, .law ol { padding-inline-start: 20px; margin: 8px 0; }
.step { display: flex; gap: 12px; }
.step + .step { margin-top: 18px; padding-top: 18px; border-top: 1px solid var(--border); }
.step-num {
  flex-shrink: 0; display: grid; place-items: center; width: 30px; height: 30px; border-radius: 9px;
  background: var(--accent-soft); color: var(--accent); font-weight: 700;
}
.step h3 { margin: 2px 0 6px; font-size: 15px; color: var(--text); }
.step p { margin: 0 0 8px; }
.step .rows li { padding: 5px 0; font-size: 14px; }
.formula {
  margin: 8px 0 0; padding: 10px 12px; border-radius: 10px; background: var(--surface-2);
  font-size: 13.5px; font-weight: 600; color: var(--text);
}
.cite { font-size: 12px; color: var(--faint); }
.law a { color: var(--accent); word-break: break-word; }

/* ── Lock screen ────────────────────────────────────── */
#lock { min-height: 100dvh; display: grid; place-items: center; padding: 24px 16px; text-align: center; }
#lock .logo { width: 56px; height: 56px; border-radius: 16px; font-size: 24px; margin: 0 auto 16px; }
#lock h1 { margin-bottom: 4px; }
#lock p { margin: 0 0 20px; color: var(--muted); }
#pin {
  width: 220px; height: 56px; text-align: center; letter-spacing: 12px; font-size: 24px; font-weight: 700;
  border: 1px solid var(--border); border-radius: 14px; background: var(--surface); color: var(--text);
}
#pin.error { border-color: var(--tax); animation: shake .3s; }
@keyframes shake { 25% { transform: translateX(-6px) } 75% { transform: translateX(6px) } }

@media (max-width: 380px) {
  .hero .big { font-size: 32px; }
  .stat strong { font-size: 13.5px; }
}