:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --ink: #15191f;
  --muted: #535c68;
  --line: #dde1e7;
  --accent: #c2410c;
  --accent-ink: #ffffff;
  --accent-soft: #fff1e8;
  --ok: #166534; --ok-bg: #e9f7ee;
  --warn: #8a4b00; --warn-bg: #fff6e0;
  --bad: #a01b1b; --bad-bg: #fdecec;
  --focus: #1d4ed8;
  --radius: 12px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111418;
    --card: #1a1e24;
    --ink: #eceff3;
    --muted: #a3acb8;
    --line: #2d333c;
    --accent: #fb923c;
    --accent-ink: #1a1006;
    --accent-soft: #2c1d12;
    --ok: #86efac; --ok-bg: #122a1b;
    --warn: #fcd34d; --warn-bg: #2b230f;
    --bad: #fca5a5; --bad-bg: #321617;
    --focus: #93c5fd;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
a { color: var(--accent); }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; border-radius: 4px; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 16px; }
.skip { position: absolute; left: -9999px; }
.skip:focus { left: 16px; top: 8px; background: var(--card); padding: 8px 12px; z-index: 10; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

.top { padding: 20px 0 8px; }
.brand { margin: 0 0 12px; font-weight: 700; }
.brand a { color: var(--ink); text-decoration: none; display: inline-flex; gap: 8px; align-items: center; }
.brand svg { color: var(--accent); }
h1 { font-size: clamp(1.7rem, 4.5vw, 2.4rem); line-height: 1.15; margin: 0 0 8px; letter-spacing: -0.01em; }
.lede { color: var(--muted); max-width: 70ch; margin: 0 0 16px; }

.tool { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); margin-bottom: 40px; }
.tabs { display: flex; border-bottom: 1px solid var(--line); overflow-x: auto; }
.tabs button {
  flex: 1 0 auto; background: none; border: 0; border-bottom: 3px solid transparent; color: var(--muted);
  font: inherit; font-weight: 600; padding: 14px 16px; cursor: pointer;
}
.tabs button[aria-selected="true"] { color: var(--ink); border-bottom-color: var(--accent); }
.panel { padding: 16px; }
.grid { display: grid; gap: 24px; }
@media (min-width: 860px) { .grid { grid-template-columns: 1fr 1fr; } .panel { padding: 24px; } }
.col { min-width: 0; }
.h3, h3 { font-size: 1.05rem; margin: 0 0 12px; }
.results h3 { margin-top: 20px; }

.rows { list-style: none; margin: 0 0 12px; padding: 0; display: grid; gap: 10px; }
.dest { display: grid; gap: 8px; padding: 12px; border: 1px solid var(--line); border-radius: 10px; }
@media (min-width: 520px) { .dest { grid-template-columns: 1.2fr 1.2fr 1fr; align-items: end; } .dest .rm { grid-column: 1 / -1; justify-self: end; } }

.field { display: grid; gap: 4px; margin-bottom: 12px; min-width: 0; }
.dest .field { margin: 0; }
label, legend { font-size: 0.9rem; font-weight: 600; }
input[type="number"], select {
  width: 100%; min-width: 0; font: inherit; color: var(--ink); background: var(--bg);
  border: 1px solid var(--line); border-radius: 8px; padding: 9px 10px; min-height: 44px;
}
select:disabled { opacity: 0.75; }
fieldset { border: 0; padding: 0; margin: 16px 0 12px; min-width: 0; }
legend { padding: 0; margin-bottom: 6px; }
.seg { display: flex; flex-wrap: wrap; gap: 6px; }
.seg label {
  display: inline-flex; align-items: center; gap: 6px; font-weight: 500; cursor: pointer;
  border: 1px solid var(--line); border-radius: 999px; padding: 8px 12px; min-height: 40px;
}
.seg label:has(input:checked) { border-color: var(--accent); background: var(--accent-soft); }
.seg input { accent-color: var(--accent); margin: 0; }
.two, .three { display: grid; gap: 0 12px; align-items: end; }
.two { grid-template-columns: 1fr 1fr; }
.three { grid-template-columns: repeat(3, 1fr); }
.hint, .muted { color: var(--muted); font-size: 0.9rem; }
.hint { margin: 0 0 12px; }

.btn {
  font: inherit; font-weight: 600; cursor: pointer; border-radius: 8px; padding: 10px 14px; min-height: 44px;
  background: var(--accent); color: var(--accent-ink); border: 1px solid var(--accent);
}
.btn.ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.btn.ghost:hover { border-color: var(--accent); }
.btn.link { background: none; border: 0; color: var(--muted); text-decoration: underline; padding: 8px 0; min-height: 0; font-weight: 500; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
#useFile { margin-bottom: 12px; }
.actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }

.big { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.big.one { grid-template-columns: 1fr; }
.big > div { border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; display: grid; }
.big .hl { background: var(--accent-soft); border-color: var(--accent); }
.lbl { font-size: 0.85rem; color: var(--muted); }
.val { font-size: clamp(1.5rem, 5vw, 2rem); font-weight: 700; font-variant-numeric: tabular-nums; line-height: 1.2; }
.result-line { font-size: 1.1rem; margin: 4px 0; }
.verdict { border-radius: 8px; padding: 10px 12px; margin: 12px 0 0; font-weight: 600; }
.verdict.ok { background: var(--ok-bg); color: var(--ok); }
.verdict.warn { background: var(--warn-bg); color: var(--warn); }
.verdict.bad { background: var(--bad-bg); color: var(--bad); }
.warnings { margin: 12px 0 0; padding: 10px 12px 10px 28px; background: var(--warn-bg); color: var(--ink); border-radius: 8px; font-size: 0.92rem; }
.warnings li + li { margin-top: 4px; }
.res-card { border-top: 1px solid var(--line); padding-top: 12px; margin-top: 16px; }
.res-card h3 { margin: 0 0 8px; }
.sub { font-weight: 500; color: var(--muted); font-size: 0.9rem; }
.kv { margin: 0; display: grid; gap: 4px; }
.kv div { display: grid; grid-template-columns: 9.5em 1fr; gap: 8px; }
.kv dt { color: var(--muted); font-size: 0.9rem; }
.kv dd { margin: 0; overflow-wrap: anywhere; }
.tag { font-size: 0.75rem; border: 1px solid var(--line); border-radius: 999px; padding: 1px 8px; color: var(--muted); white-space: nowrap; }
.note { color: var(--muted); font-size: 0.9rem; margin: 8px 0 0; }

.hints { border-top: 1px solid var(--line); padding: 16px; }
@media (min-width: 860px) { .hints { padding: 16px 24px 24px; } }
.hints summary { font-weight: 700; cursor: pointer; }
.hints h3 { margin: 16px 0 6px; }
.hints ul { margin: 0; padding-left: 20px; }
.hints li { margin: 3px 0; }
code { font: 0.9em ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; background: var(--bg); border: 1px solid var(--line); border-radius: 5px; padding: 0 5px; white-space: nowrap; }

.toolfoot { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 8px; border-top: 1px solid var(--line); padding: 12px 16px; }
.privacy { margin: 0; font-size: 0.9rem; color: var(--muted); }

.content { max-width: 820px; }
.content h2 { font-size: 1.4rem; margin: 36px 0 10px; line-height: 1.25; }
.content p { margin: 0 0 12px; }
.callout { background: var(--card); border-left: 4px solid var(--accent); padding: 12px 14px; border-radius: 6px; }
.steps { padding-left: 22px; }
.steps li { margin: 6px 0; }
.tblwrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 10px; background: var(--card); }
.tbl { border-collapse: collapse; width: 100%; font-size: 0.93rem; font-variant-numeric: tabular-nums; }
.tbl th, .tbl td { text-align: left; padding: 9px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
.tbl thead th { font-size: 0.85rem; color: var(--muted); }
.tbl tbody tr:last-child > * { border-bottom: 0; }
.tbl.small { margin-top: 16px; }
.tbl caption { text-align: left; font-weight: 600; padding-bottom: 6px; }
.faq details { border-bottom: 1px solid var(--line); padding: 12px 0; }
.faq summary { font-weight: 600; cursor: pointer; }
.faq details p { margin: 8px 0 0; color: var(--ink); }
.updated { color: var(--muted); font-size: 0.9rem; margin-top: 32px; }

.foot { border-top: 1px solid var(--line); margin-top: 48px; padding: 20px 0 32px; font-size: 0.92rem; color: var(--muted); }
.foot p { margin: 4px 0; }
@media (max-width: 420px) {
  .three { grid-template-columns: 1fr 1fr 1fr; gap: 0 8px; }
  .kv div { grid-template-columns: 1fr; gap: 0; }
}
@media print { .tabs, .actions, .toolfoot, .foot, .skip { display: none; } }