/* VATWarden design system.
   Point of view: this is a product about records, registries and proof — so it
   should look like a well-kept ledger, not a generic SaaS dashboard. Warm paper
   ground, a serif for headings (documents, not landing pages), monospace for
   anything that is data, and one restrained institutional green. */

@font-face {
  font-family: 'Plex Sans';
  src: url('/assets/fonts/plex-sans-var.woff2') format('woff2-variations');
  font-weight: 400 600;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Plex Serif';
  src: url('/assets/fonts/plex-serif-600.woff2') format('woff2');
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Plex Mono';
  src: url('/assets/fonts/plex-mono-400.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

:root {
  --paper: #fbfaf7;
  --paper-2: #f3f1ea;
  --paper-3: #ebe8de;
  --white: #ffffff;
  --ink: #1b1a17;
  --ink-2: #5c5952;
  --ink-3: #8a8579;
  --line: #e2ded3;
  --line-2: #d3cec0;
  --brand: #14503c;
  --brand-2: #0e3b2c;
  --brand-tint: #e8f0ec;
  --night: #16191b;
  --night-2: #21262a;
  --night-ink: #d8d5cc;
  --ok: #1a7f4b;
  --ok-bg: #e6f2ea;
  --bad: #a32e22;
  --bad-bg: #faeae7;
  --warn: #8a5a12;
  --warn-bg: #f8eeda;
  --sans: 'Plex Sans', ui-sans-serif, system-ui, sans-serif;
  --serif: 'Plex Serif', Georgia, 'Times New Roman', serif;
  --mono: 'Plex Mono', ui-monospace, Menlo, Consolas, monospace;
  --wrap: 1080px;
  --radius: 4px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--sans);
  font-size: 16.5px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.container { max-width: var(--wrap); margin: 0 auto; padding: 0 24px; width: 100%; }
main.container { flex: 1; padding-top: 3rem; padding-bottom: 4rem; }
main.container.flush { padding-top: 0; padding-bottom: 0; max-width: none; padding-left: 0; padding-right: 0; }

a { color: var(--brand); text-decoration: none; text-underline-offset: 2px; }
a:hover { text-decoration: underline; }

h1, h2, h3 { font-family: var(--serif); font-weight: 600; letter-spacing: -.015em; }
h1 { font-size: 2.6rem; line-height: 1.12; margin: 0 0 1rem; }
/* Prose pages rely on these top margins for rhythm; the band/card layouts below
   drive their own spacing and reset the first heading to zero. */
h2 { font-size: 1.75rem; line-height: 1.2; margin: 2.25rem 0 .6rem; }
h3 { font-size: 1.1rem; line-height: 1.3; margin: 1.5rem 0 .4rem; }
.band-inner > h2:first-of-type, .split > div > h2:first-of-type,
.card h3, .step h3, .price-card h3, .panel h3 { margin-top: 0; }
p { margin: .5rem 0 1rem; }
.muted { color: var(--ink-2); }
.small { font-size: .875rem; }
.num { font-variant-numeric: tabular-nums; }
.cap { font-family: var(--mono); font-size: .72rem; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-3); }

/* ---------- chrome ---------- */

.site-header { border-bottom: 1px solid var(--line); background: var(--paper); }
.site-header nav { display: flex; align-items: center; justify-content: space-between; min-height: 60px; gap: 16px; flex-wrap: wrap; }
.brand { display: flex; align-items: baseline; gap: 1px; color: var(--ink); font-family: var(--mono); font-size: 1.05rem; letter-spacing: -.02em; }
.brand:hover { text-decoration: none; }
.brand b { font-weight: 400; color: var(--brand); }
.brand span { color: var(--ink); }
.nav-links { display: flex; align-items: center; gap: 20px; flex-wrap: wrap; }
.nav-links a { color: var(--ink-2); font-size: .92rem; }
.nav-links a.active, .nav-links a:hover { color: var(--ink); text-decoration: none; }
.nav-links a.active { box-shadow: inset 0 -2px 0 var(--brand); }
/* `.nav-links a` outranks `.btn`, so the header CTA needs its colour restated
   or its label renders as dark ink on the dark green button. */
.nav-links a.btn, .nav-links a.btn:hover { color: var(--paper); }

.site-footer { border-top: 1px solid var(--line); padding: 1.5rem 0; color: var(--ink-2); font-size: .85rem; background: var(--paper-2); }
.site-footer .container { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; }
.site-footer a { color: var(--ink-2); }

/* ---------- buttons ---------- */

.btn {
  display: inline-block; background: var(--brand); color: var(--paper); border: 1px solid var(--brand);
  cursor: pointer; padding: .6rem 1.25rem; border-radius: var(--radius);
  font-family: var(--sans); font-size: .95rem; font-weight: 500; line-height: 1.4;
  transition: background .12s ease;
}
.btn:hover { background: var(--brand-2); border-color: var(--brand-2); text-decoration: none; color: var(--paper); }
.btn-sm { padding: .35rem .8rem; font-size: .875rem; }
.btn-ghost { background: transparent; color: var(--ink); border-color: var(--line-2); }
.btn-ghost:hover { background: var(--paper-2); color: var(--ink); border-color: var(--ink-3); }
.btn-danger { background: transparent; color: var(--bad); border-color: var(--line-2); }
.btn-danger:hover { background: var(--bad-bg); border-color: var(--bad); color: var(--bad); }
.link-btn { background: none; border: none; color: var(--ink-2); cursor: pointer; font: inherit; font-size: .92rem; padding: 0; }
.link-btn:hover { color: var(--ink); text-decoration: underline; }
.inline-form { display: inline; }

/* ---------- full-bleed bands ---------- */

.band { padding: 4rem 0; border-top: 1px solid var(--line); }
.band-tint { background: var(--paper-2); }
.band-dark { background: var(--night); color: var(--night-ink); border-top: none; }
.band-dark h2, .band-dark h3 { color: var(--paper); }
.band-dark .cap { color: #7d8a86; }
.band-dark a { color: #7fc3a5; }
.band-dark .muted { color: #9a9c98; }
.band-dark code { background: #2b3236; color: #cfd4d2; }
.band-dark .cap, .band-dark th { color: #7d8a86; }
/* Same specificity trap as the nav: `.band-dark a` outranks `.btn`, which would
   tint both CTAs mint and leave a paper-coloured outline floating on the dark. */
.band-dark .btn, .band-dark .btn:hover { color: var(--paper); }
.band-dark .btn-ghost { border-color: #3d464b; }
.band-dark .btn-ghost:hover { background: var(--night-2); border-color: #5b666c; }
.band-inner { max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }

/* ---------- hero (asymmetric: copy left, evidence right) ---------- */

.hero { padding: 4.5rem 0 3.5rem; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr); gap: 56px; align-items: center; }
.hero h1 { font-size: 3rem; max-width: 15ch; }
.hero p.lede { font-size: 1.15rem; color: var(--ink-2); max-width: 46ch; margin: 0 0 1.75rem; }
.cta-row { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.hero-note { margin-top: 1.25rem; font-size: .85rem; color: var(--ink-3); }
@media (max-width: 860px) {
  .hero-grid { grid-template-columns: minmax(0, 1fr); gap: 36px; }
  .hero h1 { font-size: 2.3rem; max-width: none; }
  h1 { font-size: 2.1rem; }
}

/* Grid items default to min-width:auto, so one wide <pre> or long token stretches
   its whole column and the page scrolls sideways. Every grid child may shrink. */
.hero-grid > *, .split > *, .features > *, .steps > *, .pricing-grid > *, .stat-row > *, .docs-layout > * { min-width: 0; }

@media (max-width: 600px) {
  .band { padding: 2.5rem 0; }
  .hero { padding: 2rem 0 2.5rem; }
  .band-inner, .container { padding-left: 18px; padding-right: 18px; }
}

/* ---------- product mockups (the real UI, rendered as markup) ---------- */

.panel {
  background: var(--white); border: 1px solid var(--line-2); border-radius: 6px;
  box-shadow: 0 1px 2px rgba(27, 26, 23, .04), 0 8px 24px -12px rgba(27, 26, 23, .18);
  overflow: hidden;
}
.panel-head {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  padding: .55rem .9rem; background: var(--paper-2); border-bottom: 1px solid var(--line);
}
.panel-body { padding: .9rem; }
.panel-foot { padding: .6rem .9rem; border-top: 1px solid var(--line); background: var(--paper); font-size: .8rem; color: var(--ink-2); }
.band-dark .panel { background: var(--night-2); border-color: #333a3e; box-shadow: none; }
.band-dark .panel-head { background: #1b2023; border-bottom-color: #333a3e; }
.band-dark .panel-foot { background: #1b2023; border-top-color: #333a3e; color: #9a9c98; }

.mock-row {
  display: grid; grid-template-columns: 1fr auto; gap: 10px; align-items: center;
  padding: .5rem .35rem; border-bottom: 1px solid var(--line);
}
.mock-row:last-child { border-bottom: none; }
.mock-vat { font-family: var(--mono); font-size: .82rem; color: var(--ink); }
.mock-label { font-size: .78rem; color: var(--ink-2); }
.mock-row.flipped { background: var(--bad-bg); margin: 0 -.35rem; padding-left: .7rem; padding-right: .7rem; box-shadow: inset 3px 0 0 var(--bad); }
/* The chip needs its own ground once the whole row is tinted the same colour. */
.mock-row.flipped .badge-invalid { background: var(--white); }
.band-dark .mock-row { border-bottom-color: #333a3e; }
.band-dark .mock-vat { color: var(--night-ink); }
.band-dark .mock-label { color: #9a9c98; }

.kv { display: grid; grid-template-columns: max-content 1fr; gap: .3rem 1rem; font-size: .82rem; }
.kv dt { color: var(--ink-3); font-family: var(--mono); font-size: .72rem; letter-spacing: .04em; text-transform: uppercase; align-self: center; }
.kv dd { margin: 0; font-family: var(--mono); color: var(--ink); overflow-wrap: anywhere; }
.band-dark .kv dd { color: var(--night-ink); }

.stamp {
  display: inline-flex; align-items: center; gap: 6px; font-family: var(--mono); font-size: .74rem;
  border: 1px solid var(--ok); color: var(--ok); border-radius: 3px; padding: .1rem .4rem; letter-spacing: .04em;
}

/* ---------- feature cards ---------- */

.features { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 28px; margin: 2rem 0 0; }
.card { border: none; border-top: 2px solid var(--brand); border-radius: 0; padding: 1rem 0 0; background: none; }
.card h3 { margin-top: 0; }
.card p { margin-bottom: 0; color: var(--ink-2); font-size: .95rem; }

/* Two-column prose + figure. Top-aligned: the columns are rarely the same
   height, and centring leaves the shorter one floating in dead space. */
.split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 56px; align-items: start; }
.split.narrow-first { grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr); }
@media (max-width: 860px) { .split, .split.narrow-first { grid-template-columns: minmax(0, 1fr); gap: 32px; } }

/* numbered steps */
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 28px; margin-top: 2rem; counter-reset: step; }
.step { position: relative; padding-top: 2.2rem; }
.step::before {
  counter-increment: step; content: counter(step, decimal-leading-zero);
  position: absolute; top: 0; left: 0;
  font-family: var(--mono); font-size: .78rem; color: #7fc3a5; letter-spacing: .08em;
  border-top: 2px solid #2f6b55; padding-top: .5rem; width: 100%;
}
.step h3 { font-size: 1rem; margin-bottom: .3rem; }
.step p { font-size: .9rem; margin: 0; color: #9a9c98; }

/* ---------- pricing ---------- */

.pricing-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 24px; margin: 2rem 0; align-items: start; }
.price-card { border: 1px solid var(--line-2); border-radius: 6px; padding: 1.75rem; background: var(--white); }
.price-card.featured { border-color: var(--brand); box-shadow: inset 0 3px 0 var(--brand); }
.price-card .price { font-family: var(--serif); font-size: 2.6rem; font-weight: 600; letter-spacing: -.02em; }
.price-card .price span { font-family: var(--sans); font-size: .95rem; font-weight: 400; color: var(--ink-2); letter-spacing: 0; }
.price-card ul { padding-left: 0; margin: 1.1rem 0; list-style: none; }
.price-card li { margin: .45rem 0; font-size: .93rem; padding-left: 1.4rem; position: relative; }
.price-card li::before { content: "—"; position: absolute; left: 0; color: var(--brand); font-family: var(--mono); font-size: .8rem; }

/* ---------- tables ---------- */

table { border-collapse: collapse; width: 100%; margin: 1rem 0; font-size: .9rem; }
th, td { text-align: left; padding: .6rem .75rem; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-family: var(--mono); font-weight: 400; font-size: .72rem; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-3); }
td.num { font-variant-numeric: tabular-nums; }
.table-scroll { overflow-x: auto; }
/* Reference tables (docs, evidence) have more columns than a phone has room for.
   Let the table itself scroll rather than the whole page. */
@media (max-width: 700px) { table { display: block; overflow-x: auto; max-width: 100%; } }

/* ---------- forms ---------- */

form.stack { display: flex; flex-direction: column; gap: 1rem; max-width: 420px; }
label { font-weight: 500; font-size: .88rem; display: block; margin-bottom: .3rem; }
input[type=text], input[type=email], input[type=password], input[type=url], select {
  width: 100%; padding: .55rem .7rem; border: 1px solid var(--line-2); border-radius: var(--radius);
  font-family: var(--sans); font-size: 1rem; background: var(--white); color: var(--ink);
}
input:focus, select:focus { outline: 2px solid var(--brand); outline-offset: 1px; border-color: var(--brand); }
.field-hint { font-size: .8rem; color: var(--ink-2); margin-top: .25rem; }
.form-row { display: flex; gap: 12px; }
.form-row > * { flex: 1; }

/* ---------- messages, badges ---------- */

.flash { padding: .75rem 1rem; border-radius: var(--radius); margin: 1rem 0 0; font-size: .93rem; border-left: 3px solid; }
.flash-ok { background: var(--ok-bg); color: var(--ok); border-color: var(--ok); }
.flash-err { background: var(--bad-bg); color: var(--bad); border-color: var(--bad); }
.flash-info { background: var(--paper-2); color: var(--ink); border-color: var(--ink-3); }

.badge { display: inline-block; padding: .1rem .5rem; border-radius: 3px; font-family: var(--mono); font-size: .74rem; letter-spacing: .03em; }
.badge-valid { background: var(--ok-bg); color: var(--ok); }
.badge-invalid { background: var(--bad-bg); color: var(--bad); }
.badge-unknown { background: var(--warn-bg); color: var(--warn); }
.badge-neutral { background: var(--paper-3); color: var(--ink-2); }

/* ---------- code ---------- */

pre, code { font-family: var(--mono); font-size: .84em; }
pre {
  background: var(--night); color: #cfd4d2; padding: 1.1rem 1.25rem; border-radius: 6px;
  overflow-x: auto; line-height: 1.55; border: 1px solid var(--night-2);
}
code { background: var(--paper-3); padding: .1em .35em; border-radius: 3px; }
pre code { background: none; padding: 0; }
.kbd { font-family: var(--mono); background: var(--paper-2); border: 1px solid var(--line-2); border-radius: 3px; padding: 0 .3em; font-size: .85em; }
.code-cap { display: flex; justify-content: space-between; align-items: center; margin-bottom: .4rem; }

.key-reveal {
  font-family: var(--mono); background: var(--warn-bg); border: 1px dashed var(--warn);
  padding: .85rem 1rem; border-radius: var(--radius); word-break: break-all; margin: 1rem 0; font-size: .85rem;
}

/* ---------- dashboard stats ---------- */

.stat-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 20px; margin: 1.5rem 0; }
.stat { border: 1px solid var(--line); border-radius: 6px; padding: 1rem 1.1rem; background: var(--white); }
.stat .n { font-family: var(--serif); font-size: 1.8rem; font-weight: 600; font-variant-numeric: tabular-nums; line-height: 1.1; }
.stat .l { font-family: var(--mono); font-size: .7rem; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-3); margin-top: .2rem; }
.meter { height: 6px; background: var(--paper-3); border-radius: 99px; overflow: hidden; margin-top: .6rem; }
.meter > div { height: 100%; background: var(--brand); }
.meter.over > div { background: var(--bad); }

/* ---------- docs ---------- */

.docs-layout { display: grid; grid-template-columns: 190px 1fr; gap: 3rem; }
.docs-nav { position: sticky; top: 1.5rem; align-self: start; font-size: .88rem; border-left: 1px solid var(--line); padding-left: 1rem; }
.docs-nav a { display: block; padding: .22rem 0; color: var(--ink-2); }
.docs-nav a:hover { color: var(--ink); }
@media (max-width: 760px) { .docs-layout { grid-template-columns: 1fr; } .docs-nav { position: static; border-left: none; padding-left: 0; } }

/* ---------- free checker result ---------- */

.check-result { border: 1px solid var(--line-2); border-left-width: 3px; border-radius: 6px; padding: 1.4rem 1.6rem; margin: 1.5rem 0; background: var(--white); }
.check-result.valid { border-left-color: var(--ok); }
.check-result.invalid { border-left-color: var(--bad); }
.check-result dt { font-family: var(--mono); font-size: .7rem; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-3); margin-top: .8rem; }
.check-result dd { margin: 0; font-weight: 500; }

@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }