:root {
  --bg: #f7f8fa; --paper: #ffffff; --ink: #14171f; --ink-2: #4a5263; --ink-3: #7a8396;
  --line: #e3e6ec; --brand: #5b3df5; --brand-ink: #ffffff; --brand-soft: #efeaff;
  --good: #0f8a5f; --good-soft: #e3f6ee; --warn: #a15c00; --warn-soft: #fff3df; --bad: #c0362c; --bad-soft: #fde8e6;
  --radius: 12px; --shadow: 0 1px 2px rgba(16,24,40,.06), 0 1px 3px rgba(16,24,40,.08);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body { font-family: var(--font); color: var(--ink); background: var(--bg); line-height: 1.5; font-size: 15px; }
a { color: var(--brand); }
h1, h2, h3 { line-height: 1.2; margin: 0 0 .5em; }
h1 { font-size: 2.4rem; letter-spacing: -.02em; }
h2 { font-size: 1.6rem; letter-spacing: -.01em; }
h3 { font-size: 1.1rem; }
p { margin: 0 0 1em; }
.muted { color: var(--ink-2); }
.small { font-size: .85rem; }
.tiny { font-size: .78rem; color: var(--ink-3); }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 20px; }
.btn { display: inline-flex; align-items: center; gap: .4em; border: 1px solid var(--line); background: var(--paper); color: var(--ink); padding: .55em 1em; border-radius: 9px; font: inherit; font-weight: 600; cursor: pointer; text-decoration: none; }
.btn:hover { border-color: #c9cede; }
.btn.primary { background: var(--brand); color: var(--brand-ink); border-color: var(--brand); }
.btn.primary:hover { filter: brightness(1.07); }
.btn.ghost { background: transparent; border-color: transparent; color: var(--ink-2); }
.btn.small { padding: .35em .7em; font-size: .85rem; }
.btn[disabled] { opacity: .5; cursor: not-allowed; }
.card { background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); }
.pill { display: inline-block; padding: .15em .6em; border-radius: 999px; font-size: .75rem; font-weight: 600; background: #eef0f4; color: var(--ink-2); white-space: nowrap; }
.pill.good { background: var(--good-soft); color: var(--good); }
.pill.warn { background: var(--warn-soft); color: var(--warn); }
.pill.bad { background: var(--bad-soft); color: var(--bad); }
.pill.brand { background: var(--brand-soft); color: var(--brand); }
input, select { font: inherit; padding: .5em .65em; border: 1px solid var(--line); border-radius: 8px; background: #fff; color: var(--ink); }
input:focus, select:focus { outline: 2px solid var(--brand-soft); border-color: var(--brand); }
label { font-size: .85rem; color: var(--ink-2); display: block; margin-bottom: .25em; font-weight: 600; }
table { border-collapse: collapse; width: 100%; }
th, td { text-align: left; padding: .55em .6em; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: .78rem; text-transform: uppercase; letter-spacing: .04em; color: var(--ink-3); font-weight: 700; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.neg { color: var(--bad); }
.pos { color: var(--good); }
.table-scroll { overflow-x: auto; }
.grid { display: grid; gap: 16px; }
.grid.cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid.cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid.cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
@media (max-width: 860px) { .grid.cols-3, .grid.cols-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 560px) { .grid.cols-2, .grid.cols-3, .grid.cols-4 { grid-template-columns: 1fr; } h1 { font-size: 1.8rem; } }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.spacer { flex: 1; }
.notice { border-radius: 10px; padding: .75em 1em; background: var(--warn-soft); color: #5c3a00; font-size: .9rem; }
.notice.info { background: var(--brand-soft); color: #2d1f86; }
.notice.good { background: var(--good-soft); color: #064b33; }

/* ---------- Site header / footer ---------- */
.site-header { background: var(--paper); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 10; }
.site-header .wrap { display: flex; align-items: center; gap: 18px; height: 60px; flex-wrap: wrap; }
.logo { font-weight: 800; letter-spacing: -.02em; color: var(--ink); text-decoration: none; font-size: 1.1rem; display: inline-flex; align-items: center; gap: .4em; }
.logo .mark { display: inline-grid; place-items: center; width: 26px; height: 26px; border-radius: 7px; background: var(--brand); color: #fff; font-size: .8rem; }
.nav { display: flex; gap: 16px; flex-wrap: wrap; }
.nav a { color: var(--ink-2); text-decoration: none; font-weight: 600; font-size: .92rem; }
.nav a:hover { color: var(--ink); }
.site-footer { border-top: 1px solid var(--line); margin-top: 60px; padding: 30px 0 40px; background: var(--paper); }
.site-footer .row a { color: var(--ink-2); text-decoration: none; font-size: .9rem; }

/* ---------- Landing ---------- */
.hero { padding: 64px 0 40px; }
.hero h1 { font-size: 3rem; max-width: 760px; }
.hero .lead { font-size: 1.2rem; color: var(--ink-2); max-width: 680px; }
@media (max-width: 560px) { .hero h1 { font-size: 2.1rem; } }
section.block { padding: 48px 0; }
.feature h3 { margin-top: .2em; }
.price-card { display: flex; flex-direction: column; gap: 10px; }
.price-card .price { font-size: 2.2rem; font-weight: 800; letter-spacing: -.02em; }
.price-card .price span { font-size: 1rem; color: var(--ink-3); font-weight: 600; }
.price-card ul { padding-left: 1.1em; margin: 0; color: var(--ink-2); }
.price-card.featured { border: 2px solid var(--brand); }
.faq details { border-bottom: 1px solid var(--line); padding: 14px 0; }
.faq summary { cursor: pointer; font-weight: 700; }
.faq details p { margin: .6em 0 0; color: var(--ink-2); }
.calc { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 24px; }
@media (max-width: 760px) { .calc { grid-template-columns: 1fr; } }
.calc .fields { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.calc .fields input, .calc .fields select { width: 100%; }
.calc-out .big { font-size: 2.2rem; font-weight: 800; letter-spacing: -.02em; }
.calc-out table td { padding: .4em .2em; }
.legal { max-width: 760px; }
.legal h2 { font-size: 1.2rem; margin-top: 1.6em; }

/* ---------- App ---------- */
.app-main { padding: 20px 0 60px; }
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--line); margin: 18px 0; flex-wrap: wrap; }
.tab { border: none; background: none; padding: .7em 1em; font: inherit; font-weight: 700; color: var(--ink-3); cursor: pointer; border-bottom: 2px solid transparent; margin-bottom: -1px; }
.tab[aria-selected="true"] { color: var(--ink); border-bottom-color: var(--brand); }
.dropzone { border: 2px dashed #c9cede; border-radius: var(--radius); padding: 26px; text-align: center; background: var(--paper); transition: border-color .15s, background .15s; }
.dropzone.drag { border-color: var(--brand); background: var(--brand-soft); }
.metric .v { font-size: 1.6rem; font-weight: 800; letter-spacing: -.02em; font-variant-numeric: tabular-nums; }
.metric .l { font-size: .8rem; color: var(--ink-3); font-weight: 700; text-transform: uppercase; letter-spacing: .04em; }
.metric .d { font-size: .82rem; color: var(--ink-2); }
tr.show-row { cursor: pointer; }
tr.show-row:hover td { background: #fafbff; }
tr.show-row.selected td { background: var(--brand-soft); }
tr.locked td { color: var(--ink-3); }
.blur { filter: blur(5px); user-select: none; }
.detail { margin-top: 16px; }
.breakdown td { padding: .45em .4em; }
.breakdown tr.total td { font-weight: 800; border-top: 2px solid var(--ink); }
.chart svg { width: 100%; height: auto; display: block; }
.modal-backdrop { position: fixed; inset: 0; background: rgba(15, 18, 30, .45); display: grid; place-items: center; z-index: 50; padding: 20px; }
.modal { background: var(--paper); border-radius: 16px; padding: 24px; max-width: 860px; width: 100%; max-height: 90vh; overflow: auto; }
.hidden { display: none !important; }
.file-list li { padding: 10px 0; border-bottom: 1px solid var(--line); list-style: none; }
.file-list { padding: 0; margin: 0; }
code { font-family: var(--mono); font-size: .85em; background: #f1f2f6; padding: .1em .35em; border-radius: 5px; }
@media (max-width: 640px) {
  .site-header .wrap { gap: 10px; height: 56px; flex-wrap: nowrap; }
  .site-header .nav, .local-pill { display: none; }
  .site-header .logo { font-size: 1rem; }
}