/* Inter, SIL Open Font License. Latin subset, self-hosted. */
@font-face {
  font-family: Inter;
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("/fonts/inter-latin-400-normal.woff2") format("woff2");
}
@font-face {
  font-family: Inter;
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("/fonts/inter-latin-500-normal.woff2") format("woff2");
}
@font-face {
  font-family: Inter;
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("/fonts/inter-latin-600-normal.woff2") format("woff2");
}

:root {
  --ink: #0e1525;
  --ink-soft: #3c4a60;
  --paper: #f3f5f9;
  --card: #ffffff;
  --sheet: #f8fafc;
  --line: #e2e8f0;
  --band: #0b1220;
  --band-text: #f8fafc;
  --copper: #1d4ed8;
  --copper-deep: #1e40af;
  --link: #1d4ed8;
  --gain: #047857;
  --loss: #b91c1c;
  --warn: #92400e;
  --info: #1e40af;
  --shadow: 0 12px 32px rgba(15, 23, 42, 0.06);
  --banner: #eff6ff;
  --lock: #f8fafc;
  --lock-open: #ecfdf5;
  --focus: #1d4ed8;
  --header-bg: rgba(255, 255, 255, 0.9);
  --header-text: #0e1525;
  --header-link: #3c4a60;
  --accent: #1d4ed8;
  --on-accent: #ffffff;
  --radius: 16px;
  color-scheme: light;
  font-family: Inter, "Segoe UI", Helvetica, Arial, sans-serif;
  color: var(--ink);
  background:
    radial-gradient(900px 420px at 100% -10%, rgba(37, 99, 235, 0.08), transparent 55%),
    var(--paper);
  line-height: 1.55;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --ink: #e8eefc;
  --ink-soft: #c5d0e6;
  --paper: #0b1020;
  --card: #141b2e;
  --sheet: #10182b;
  --line: #2a3650;
  --band: #1d4ed8;
  --band-text: #ffffff;
  --copper: #93c5fd;
  --copper-deep: #bfdbfe;
  --link: #93c5fd;
  --gain: #6ee7b7;
  --loss: #fca5a5;
  --warn: #fcd34d;
  --info: #93c5fd;
  --shadow: 0 12px 32px rgba(0, 0, 0, 0.28);
  --banner: #172554;
  --lock: #10182b;
  --lock-open: #052e24;
  --focus: #93c5fd;
  --header-bg: rgba(11, 16, 32, 0.9);
  --header-text: #e8eefc;
  --header-link: #c5d0e6;
  --accent: #1d4ed8;
  --on-accent: #ffffff;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --ink: #e8eefc;
    --ink-soft: #c5d0e6;
    --paper: #0b1020;
    --card: #141b2e;
    --sheet: #10182b;
    --line: #2a3650;
    --band: #1d4ed8;
    --band-text: #ffffff;
    --copper: #93c5fd;
    --copper-deep: #bfdbfe;
    --link: #93c5fd;
    --gain: #6ee7b7;
    --loss: #fca5a5;
    --warn: #fcd34d;
    --info: #93c5fd;
    --shadow: 0 12px 32px rgba(0, 0, 0, 0.28);
    --banner: #172554;
    --lock: #10182b;
    --lock-open: #052e24;
    --focus: #93c5fd;
    --header-bg: rgba(11, 16, 32, 0.9);
    --header-text: #e8eefc;
    --header-link: #c5d0e6;
    --accent: #1d4ed8;
    --on-accent: #ffffff;
  }
}

* { box-sizing: border-box; }

html, body { margin: 0; max-width: 100%; overflow-x: clip; }
body { min-height: 100vh; }

.top { background: var(--band); color: var(--band-text); padding: 28px 20px 24px; }
.brand { display: flex; align-items: baseline; gap: 12px; }
.mark, .site-mark {
  font-weight: 600;
  font-size: 1.15rem;
  letter-spacing: -0.04em;
  text-decoration: none;
}
.pill {
  border: 1px solid var(--line);
  color: var(--ink-soft);
  border-radius: 999px;
  padding: 2px 8px;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-weight: 600;
}
.top p { max-width: 40rem; margin: 12px 0 0; color: #d9d0c1; }

main { max-width: 1120px; margin: 0 auto; padding: 28px 24px 80px; }

.panel {
  background: var(--card);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 18px;
}

h1, h2, h3 { font-weight: 600; letter-spacing: -0.035em; line-height: 1.15; }
h1 { margin: 0 0 12px; font-size: clamp(2rem, 4vw, 2.6rem); }
h2 { margin: 0 0 12px; font-size: clamp(1.5rem, 2.4vw, 1.85rem); }
h3 { margin: 0 0 6px; font-size: 1.05rem; }

.lede, .hint, .note, footer p { color: var(--ink-soft); }
.lede { margin-top: 0; max-width: 40rem; font-size: 1.05rem; }

.drop {
  border: 1.5px dashed #b7c3d6;
  border-radius: 18px;
  background: linear-gradient(180deg, var(--card), var(--sheet));
  padding: 22px;
  display: grid;
  gap: 12px;
}
.drop.hot, textarea.hot { border-color: var(--accent); background: var(--banner); }
.drop p { margin: 0; }

.file-label {
  justify-self: start;
}
.file-label input { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

.actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 16px; }

button, .file-label, a.button, .site-cta {
  font: inherit;
  font-weight: 600;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: var(--on-accent);
  padding: 10px 16px;
  min-height: 44px;
  border-radius: 12px;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
button.ghost, a.button.ghost, .theme-toggle, .nav-toggle {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}
button:disabled { opacity: 0.55; cursor: wait; }

fieldset {
  border: 1px solid var(--line);
  border-radius: 12px;
  margin: 16px 0;
  padding: 12px 14px;
  display: grid;
  gap: 8px;
}
legend { padding: 0 6px; font-weight: 600; }
.choice { display: flex; gap: 8px; align-items: center; min-height: 44px; }
.choice span { color: var(--ink-soft); font-size: 0.92rem; }

textarea, select, input[type="text"], input[type="email"], input[type="number"] {
  font: inherit;
  width: 100%;
  min-height: 44px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--card);
  color: var(--ink);
}
textarea { min-height: 9rem; resize: vertical; font-family: ui-monospace, "Cascadia Mono", "Liberation Mono", monospace; font-size: 0.85rem; }
textarea:focus, select:focus, input:focus { outline: 3px solid var(--focus); outline-offset: 2px; border-color: var(--accent); }

.stack { display: grid; gap: 14px; margin-bottom: 8px; }
label.field { display: grid; gap: 6px; font-size: 0.92rem; font-weight: 600; }
label.field input, label.field select, label.field textarea { font-weight: 400; }

.file-list { list-style: none; padding: 0; margin: 12px 0 0; }
.file-list li {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid var(--line);
  padding: 8px 0;
  font-variant-numeric: tabular-nums;
}
.status { min-height: 1.4em; font-weight: 600; }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px; }
.card {
  border: 1px solid var(--line);
  background: var(--sheet);
  border-radius: 14px;
  padding: 14px 16px;
}
.card .k { display: block; color: var(--ink-soft); font-size: 0.75rem; letter-spacing: 0.04em; text-transform: uppercase; font-weight: 600; }
.card .v { display: block; margin-top: 6px; font-variant-numeric: tabular-nums; font-size: 1.35rem; font-weight: 600; letter-spacing: -0.03em; }
.card .v.neg { color: var(--loss); }
.card .v.pos { color: var(--gain); }

.banner {
  border: 1px solid var(--line);
  background: var(--banner);
  border-radius: 14px;
  padding: 14px 16px;
  margin: 16px 0;
}
.flags { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.flags li { display: grid; grid-template-columns: auto 1fr; gap: 8px; align-items: start; }
.badge {
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 4px 8px;
  border-radius: 999px;
  border: 1px solid currentColor;
  font-weight: 600;
}
.badge.warning { color: var(--warn); }
.badge.info { color: var(--info); }
.badge.error { color: var(--loss); }

.table-wrap, .sheet {
  overflow-x: auto;
  border: 1px solid var(--line);
  background: var(--card);
  border-radius: 14px;
}
table { width: 100%; border-collapse: collapse; font-size: 0.92rem; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: 0.72rem; letter-spacing: 0.05em; text-transform: uppercase; color: var(--ink-soft); font-weight: 600; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; font-family: ui-monospace, "Cascadia Mono", "Liberation Mono", monospace; }
td.loss { color: var(--loss); }
tr.excluded td { color: var(--ink-soft); }
caption { caption-side: bottom; text-align: left; color: var(--ink-soft); padding: 10px 12px 4px; font-size: 0.88rem; }
table.wrap th, table.wrap td { white-space: normal; }

footer, .site-footer { max-width: 1120px; margin: 0 auto; padding: 28px 24px 48px; }
a { color: var(--link); }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; }
details { margin-top: 16px; }
summary { cursor: pointer; font-weight: 600; min-height: 44px; display: flex; align-items: center; }

.nav { display: flex; flex-wrap: wrap; gap: 10px 16px; margin-top: 14px; }
.controls, .year-row, .lot { display: flex; flex-wrap: wrap; gap: 12px; align-items: end; }
.lot input { flex: 1; min-width: 8rem; }

.methods { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin-top: 16px; }
.method { border: 1px solid var(--line); background: var(--card); border-radius: 16px; padding: 16px; box-shadow: var(--shadow); }
.method h2 { margin: 0 0 8px; font-size: 1rem; }
.method .gain { font-size: 1.8rem; font-weight: 600; letter-spacing: -0.04em; margin: 0; }
.method ul { margin: 8px 0 0; padding-left: 1.1rem; }

.lock {
  border: 1px solid var(--line);
  background: var(--lock);
  border-radius: 16px;
  padding: 18px;
  margin-top: 8px;
}
.lock.unlocked { border-color: var(--gain); background: var(--lock-open); }
.lock h2 { margin-top: 0; }
code { font-family: ui-monospace, "Cascadia Mono", "Liberation Mono", monospace; font-size: 0.92em; }

.article { max-width: 760px; }
.article h1 { font-size: clamp(2rem, 4vw, 2.7rem); }
.article p, .article li { max-width: 42rem; }
.article li { margin: 8px 0; }
.article pre, body.home pre {
  background: var(--band);
  color: var(--band-text);
  padding: 14px 16px;
  overflow-x: auto;
  font-size: 0.85rem;
  line-height: 1.45;
  border-radius: 12px;
}
.article table { margin: 12px 0; }
.faq { display: grid; gap: 12px; }
.faq > div {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px 18px;
}
.faq h3 { margin: 0 0 6px; }
.related, .guide-list { list-style: none; padding: 0; display: grid; gap: 10px; }
.guide-list a { font-weight: 600; font-size: 1.05rem; }

.empty, .error-box, .placeholder {
  border: 1px dashed var(--line);
  background: var(--sheet);
  border-radius: 14px;
  padding: 16px;
}
.error-box { border-style: solid; border-color: var(--loss); color: var(--loss); background: color-mix(in srgb, var(--loss) 8%, var(--card)); }

.skip {
  position: absolute;
  left: 12px;
  top: 8px;
  transform: translateY(-150%);
  background: var(--card);
  color: var(--ink);
  padding: 8px 12px;
  z-index: 40;
  border-radius: 8px;
}
.skip:focus { transform: none; }
.glossary dt { font-weight: 600; margin-top: 14px; }
.glossary dd { margin: 4px 0 0; max-width: 42rem; }
.crumbs { font-size: 0.875rem; margin: 0 0 16px; color: var(--ink-soft); }
.crumbs a, .crumbs span { margin-right: 0.35rem; }
.hub h2 { margin-top: 28px; }

.site-header {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--header-bg);
  color: var(--header-text);
  padding: 10px 20px;
  position: sticky;
  top: 0;
  z-index: 30;
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}
.site-header .site-mark { color: var(--header-text); }
.site-nav { display: flex; flex-wrap: wrap; gap: 4px 8px; flex: 1; }
.site-nav a, .site-footer a {
  color: var(--header-link);
  text-decoration: none;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  padding: 0 8px;
  border-radius: 8px;
  font-weight: 500;
}
.site-footer a { color: var(--link); padding: 0; }
.site-nav a[aria-current="page"], .site-nav a:hover { color: var(--ink); background: var(--sheet); }
.nav-toggle { display: none; }
.header-actions { display: flex; align-items: center; gap: 8px; margin-left: auto; }
.theme-toggle, .nav-toggle { color: var(--header-text); border-color: var(--line); background: transparent; }
.site-cta { background: var(--accent); color: var(--on-accent); border-color: var(--accent); }

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  border-top: 1px solid var(--line);
  align-items: start;
}
.footer-brand { max-width: 36rem; }
.site-footer .site-mark { color: var(--ink); display: inline-block; margin-bottom: 8px; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 8px 18px; }

.hero {
  max-width: 1120px;
  margin: 20px auto 8px;
  padding: 0 24px;
}
.hero-band {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 36px;
  align-items: center;
  overflow: hidden;
  padding: 40px;
  border-radius: 28px;
  color: #f8fafc;
  background:
    radial-gradient(700px 320px at 90% 0%, rgba(59, 130, 246, 0.45), transparent 60%),
    linear-gradient(160deg, #0b1220 0%, #162033 70%);
  box-shadow: 0 24px 60px rgba(11, 18, 32, 0.18);
}
.hero-band h1 { color: #f8fafc; font-size: clamp(2.4rem, 4.6vw, 3.5rem); margin: 0 0 14px; }
.hero-band .lede { color: #d5deee; font-size: 1.08rem; }
.eyebrow {
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--link);
  margin: 0 0 12px;
}
.hero-band .eyebrow { color: #bfdbfe; }
.hero .button { background: #ffffff; color: #0b1220; border-color: #ffffff; }
.hero .button.ghost { background: transparent; color: #f8fafc; border-color: rgba(255, 255, 255, 0.35); }
.cta { display: flex; flex-wrap: wrap; gap: 10px; margin: 22px 0 0; }

.mock {
  background: #ffffff;
  color: #0e1525;
  border-radius: 18px;
  padding: 14px;
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.22);
  min-width: 0;
  max-width: 100%;
}
.mock .mock-top { display: flex; justify-content: space-between; align-items: center; font-weight: 600; margin-bottom: 10px; }
.mock .cards { grid-template-columns: repeat(3, 1fr); }
.mock .card { background: #f8fafc; }
.mock .card .v { color: #0e1525; font-size: 1.05rem; }
.mock table { color: #0e1525; }
.mock th { color: #3c4a60; }
.mock caption { color: #3c4a60; }

.section-head { max-width: 40rem; margin-bottom: 18px; }
.home section { margin: 56px 0; }
.steps, .trust-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  list-style: none;
  padding: 0;
  margin: 0;
}
.steps li, .trust-grid div, .price-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 20px;
  box-shadow: var(--shadow);
}
.steps strong, .trust-grid strong { display: block; margin: 10px 0 6px; }
.icon { width: 22px; height: 22px; color: var(--accent); }
.price-card { max-width: 440px; }
.price-card .amount { font-size: 3.2rem; font-weight: 600; letter-spacing: -0.05em; margin: 0; }
.price-card .amount span { font-size: 1rem; font-weight: 500; color: var(--ink-soft); letter-spacing: 0; }
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 12px;
  list-style: none;
  padding: 0;
  margin: 0;
}
.tool-grid a {
  display: block;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 16px;
  text-decoration: none;
  color: var(--ink);
  box-shadow: var(--shadow);
  min-height: 44px;
}
.tool-grid a span { display: block; color: var(--link); font-weight: 600; font-size: 1.05rem; }
.tool-grid a small { display: block; color: var(--ink-soft); margin-top: 6px; line-height: 1.45; font-weight: 400; }
.limits { display: grid; gap: 12px; }
.limits div { border-top: 1px solid var(--line); padding-top: 12px; }
.limits strong { display: block; }
.stepper { display: flex; gap: 8px; list-style: none; padding: 0; margin: 0 0 16px; }
.stepper li {
  flex: 1;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--ink-soft);
  border-top: 2px solid var(--line);
  padding-top: 8px;
}
.stepper li[aria-current="step"] { color: var(--ink); border-color: var(--accent); }
.print-lock, #packet { display: none; }
body.home form { display: grid; gap: 10px; max-width: 28rem; }

@media (max-width: 900px) {
  .hero-band, .steps, .trust-grid { grid-template-columns: minmax(0, 1fr); }
  .site-footer { display: grid; grid-template-columns: minmax(0, 1fr); }
  .mock .cards { grid-template-columns: 1fr; }
  .hero-band h1, .hero-band .lede { overflow-wrap: anywhere; }
}
@media (max-width: 720px) {
  .site-header { flex-wrap: nowrap; gap: 8px; padding: 8px 12px; }
  .site-mark { font-size: 1rem; }
  .header-actions { gap: 6px; }
  .nav-toggle, .theme-toggle, .site-cta { padding: 8px 10px; }
  .nav-toggle { display: inline-flex; }
  .site-nav { display: none; width: 100%; flex-direction: column; }
  .site-header.nav-open .site-nav { display: flex; }
  main { padding: 20px 16px 64px; }
  .hero { padding: 0 16px; }
  .hero-band { padding: 24px; }
  main button, main .file-label, main a.button, .hero a.button { width: 100%; }
  .methods, .controls, .year-row { display: grid; }
}
@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; transition: none !important; }
}
@media print {
  .site-header, .site-footer, .skip, .nav-toggle, .theme-toggle, .no-print, .site-cta { display: none !important; }
  body { background: white; color: black; }
  .print-lock { display: none; }
  body:not([data-packet="open"]) .print-lock { display: block; }
  body:not([data-packet="open"]) #preview .table-wrap { display: none !important; }
  body[data-packet="open"] main > :not(#packet) { display: none !important; }
  body[data-packet="open"] #packet { display: block !important; }
}