/* Accantona — quaderno tecnico: carta a quadretti, totali a doppia riga */
:root {
  --bg: #f5f8f9;
  --text: #14213d;
  --primary: #1f3f8f;
  --on-primary: #ffffff;
  --muted: #4a5a6e;
  --surface: #ffffff;
  --border: #c6d3dd;
  --green: #1d6b4f;
  --grid: rgba(31, 63, 143, 0.07);
  --grid-strong: rgba(31, 63, 143, 0.13);
  --font-display: Bahnschrift, "DIN Alternate", "Franklin Gothic Medium", "Nimbus Sans Narrow", sans-serif-condensed, sans-serif;
  --font-body: Seravek, "Gill Sans Nova", Ubuntu, Calibri, "DejaVu Sans", source-sans-pro, sans-serif;
  --font-mono: ui-monospace, Menlo, Consolas, "DejaVu Sans Mono", monospace;
  --sq: 24px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1724;
    --text: #e6edf3;
    --primary: #8fb0ff;
    --on-primary: #0f1724;
    --muted: #9aabbd;
    --surface: #172233;
    --border: #2c3b52;
    --green: #5cc79a;
    --grid: rgba(143, 176, 255, 0.06);
    --grid-strong: rgba(143, 176, 255, 0.11);
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background-color: var(--bg);
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: var(--sq) var(--sq);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.6;
}
img, svg { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--green); outline-offset: 2px; }

h1, h2, h3 { font-family: var(--font-display); line-height: 1.15; font-weight: 700; letter-spacing: 0.005em; margin: 0 0 0.6em; }
h1 { font-size: clamp(2rem, 6vw, 3.4rem); }
h2 { font-size: clamp(1.5rem, 3.6vw, 2.2rem); }
h3 { font-size: 1.2rem; }
p { margin: 0 0 1em; }

.skip { position: absolute; left: -999px; top: 0; background: var(--primary); color: var(--on-primary); padding: 8px 12px; z-index: 10; }
.skip:focus { left: 8px; }

.wrap { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 20px; }

.mono, .tag, .code { font-family: var(--font-mono); font-size: 0.82rem; letter-spacing: 0.02em; }
.tag { display: inline-block; color: var(--muted); text-transform: uppercase; }
.num { font-family: var(--font-mono); font-variant-numeric: tabular-nums; white-space: nowrap; }
.green { color: var(--green); }

/* Header: intestazione di registro */
.site-header { border-bottom: 2px solid var(--primary); background: var(--bg); }
.site-header .wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 10px 24px; padding-top: 14px; padding-bottom: 14px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: var(--text); font-family: var(--font-display); font-size: 1.35rem; font-weight: 700; }
.brand svg { width: 30px; height: 30px; }
.nav ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 4px 18px; }
.nav a { font-family: var(--font-mono); font-size: 0.85rem; color: var(--text); text-decoration: none; padding: 4px 0; border-bottom: 1px solid transparent; }
.nav a:hover, .nav a[aria-current="page"] { border-bottom-color: var(--primary); color: var(--primary); }

/* Bottoni */
.btn { display: inline-block; font-family: var(--font-display); font-size: 1.1rem; font-weight: 700; text-decoration: none; padding: 12px 22px; border: 2px solid var(--primary); background: var(--primary); color: var(--on-primary); box-shadow: 4px 4px 0 var(--text); cursor: pointer; }
.btn:hover { transform: translate(-1px, -1px); box-shadow: 5px 5px 0 var(--text); }
.btn:active { transform: translate(2px, 2px); box-shadow: 2px 2px 0 var(--text); }
.btn-ghost { background: transparent; color: var(--primary); box-shadow: none; }
.btn-ghost:hover { box-shadow: none; background: var(--surface); }

/* Hero */
.hero { padding: 48px 0 40px; border-bottom: 1px solid var(--border); }
.hero-grid { display: grid; gap: 36px; align-items: center; }
.hero .lead { font-size: 1.2rem; max-width: 36em; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; margin: 24px 0 14px; }
.hero-note { color: var(--muted); font-size: 0.95rem; }
.sheet { border: 2px solid var(--primary); background: var(--surface); padding: 10px; }
.sheet figcaption { font-family: var(--font-mono); font-size: 0.78rem; color: var(--muted); padding: 8px 4px 0; }
@media (min-width: 900px) {
  .hero { padding: 72px 0 64px; }
  .hero-grid { grid-template-columns: 1.05fr 1fr; gap: 56px; }
}

/* Sezioni numerate */
.sec { padding: 56px 0; border-bottom: 1px solid var(--border); }
.sec-head { display: grid; gap: 4px 24px; margin-bottom: 28px; }
.sec-num { font-family: var(--font-mono); font-size: 0.9rem; color: var(--primary); font-weight: 700; }
.sec-head h2 { margin: 0; }
.sec-head p { color: var(--muted); margin: 6px 0 0; max-width: 46em; }
@media (min-width: 900px) {
  .sec { padding: 80px 0; }
  .sec-head { grid-template-columns: 120px 1fr; }
  .sec-body { margin-left: 144px; }
}

/* Note numerate */
.notes { list-style: none; counter-reset: nota; margin: 0; padding: 0; display: grid; gap: 0; border-top: 1px solid var(--border); }
.notes li { counter-increment: nota; display: grid; grid-template-columns: 56px 1fr; gap: 12px; padding: 18px 0; border-bottom: 1px solid var(--border); }
.notes li::before { content: "(" counter(nota) ")"; font-family: var(--font-mono); color: var(--primary); font-weight: 700; padding-top: 2px; }
.notes h3 { margin-bottom: 4px; }
.notes p { margin: 0; }
@media (min-width: 900px) { .notes.two { grid-template-columns: 1fr 1fr; column-gap: 40px; } }

/* Tabelle registro */
.table-wrap { overflow-x: auto; border: 1px solid var(--border); background: var(--surface); }
table { width: 100%; border-collapse: collapse; font-size: 0.98rem; }
caption { text-align: left; font-family: var(--font-mono); font-size: 0.8rem; color: var(--muted); padding: 10px 14px; caption-side: bottom; border-top: 1px solid var(--border); }
th, td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--border); vertical-align: top; }
thead th { font-family: var(--font-mono); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--muted); font-weight: 600; background: var(--bg); }
td.r, th.r { text-align: right; }
tr.hl td { background: var(--grid-strong); }
tr.total td { border-bottom: 0; font-weight: 700; padding-top: 14px; }
.dbl { display: inline-block; border-bottom: 4px double var(--green); padding-bottom: 2px; color: var(--green); }

/* Prezzo */
.price-box { border: 2px solid var(--primary); background: var(--surface); display: grid; }
.price-box .col { padding: 24px; }
.price-box .col + .col { border-top: 1px solid var(--border); }
.price { font-family: var(--font-display); font-size: 3.2rem; font-weight: 700; line-height: 1; margin: 6px 0 4px; }
.price .dbl { color: var(--text); border-bottom-color: var(--green); }
.check { list-style: none; padding: 0; margin: 0 0 16px; }
.check li { padding: 6px 0 6px 30px; position: relative; border-bottom: 1px dashed var(--border); }
.check li::before { content: "✓"; position: absolute; left: 4px; color: var(--green); font-weight: 700; }
@media (min-width: 900px) {
  .price-box { grid-template-columns: 1fr 1.2fr; }
  .price-box .col + .col { border-top: 0; border-left: 1px solid var(--border); }
}

/* Form */
form .field { margin-bottom: 14px; }
label { display: block; font-family: var(--font-mono); font-size: 0.82rem; margin-bottom: 4px; }
input[type="email"], input[type="text"], select, textarea {
  width: 100%; font: inherit; color: var(--text); background: var(--bg);
  border: 1px solid var(--muted); border-radius: 0; padding: 10px 12px;
}
input:focus-visible, select:focus-visible, textarea:focus-visible { outline: 3px solid var(--green); outline-offset: 0; }
.small { font-size: 0.88rem; color: var(--muted); }

/* FAQ */
.faq details { border-bottom: 1px solid var(--border); padding: 0; }
.faq details:first-child { border-top: 1px solid var(--border); }
.faq summary { cursor: pointer; padding: 16px 0; font-family: var(--font-display); font-size: 1.12rem; font-weight: 700; list-style: none; display: grid; grid-template-columns: 56px 1fr; gap: 12px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary .code { color: var(--primary); padding-top: 3px; }
.faq details p { margin: 0 0 16px 68px; max-width: 46em; }
@media (max-width: 480px) { .faq details p { margin-left: 0; } }

/* Fogli del kit */
.tabs-list { display: grid; gap: 20px; }
.tabs-list > *, .hero-grid > *, .sec-head > *, .price-box > *, .closing-box > * { min-width: 0; }
td.num, th.num { white-space: nowrap; }
@media (max-width: 480px) { th, td { padding: 8px 10px; } table { font-size: 0.92rem; } }
.tab-sheet { border: 1px solid var(--border); background: var(--surface); }
.tab-sheet header { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; padding: 10px 16px; border-bottom: 2px solid var(--primary); background: var(--bg); }
.tab-sheet header h3 { margin: 0; }
.tab-sheet .body { padding: 16px; }
.tab-sheet .body p:last-child { margin-bottom: 0; }

/* Banda finale */
.closing { padding: 56px 0; }
.closing-box { border: 2px solid var(--primary); background: var(--surface); padding: 28px 24px; display: grid; gap: 18px; align-items: center; }
.closing-box h2 { margin: 0; }
@media (min-width: 900px) { .closing-box { grid-template-columns: 1fr auto; padding: 36px 40px; } }

.disclaimer { border-left: 4px solid var(--primary); padding: 12px 16px; background: var(--surface); font-size: 0.95rem; color: var(--muted); }

/* Footer */
.site-footer { border-top: 2px solid var(--primary); background: var(--bg); padding: 28px 0 36px; font-size: 0.92rem; }
.site-footer .wrap { display: grid; gap: 14px; }
.site-footer ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 6px 20px; }
.site-footer p { margin: 0; color: var(--muted); }
@media (min-width: 900px) { .site-footer .wrap { grid-template-columns: 1fr auto; align-items: start; } }

/* Illustrazione SVG del foglio */
.s-surface { fill: var(--surface); }
.s-grid path { stroke: var(--grid-strong); stroke-width: 1; fill: none; }
.s-head { fill: var(--primary); }
.s-mono { font-family: var(--font-mono); font-size: 13px; }
.s-small { font-size: 11px; }
.s-on { fill: var(--on-primary); }
.s-muted { fill: var(--muted); }
.s-green { fill: var(--green); font-weight: 700; }
.s-bar rect { fill: var(--primary); opacity: 0.85; }
.s-due rect { fill: var(--green); }
.s-mark path { stroke: var(--green); stroke-width: 1.5; fill: none; }
.s-axis { stroke: var(--text); stroke-width: 2; fill: none; }
.s-pig ellipse, .s-pig rect, .s-pig path { fill: var(--surface); stroke: var(--primary); stroke-width: 3; }
.s-slot { fill: var(--primary); }
.s-eye { fill: var(--primary); }
.s-coin { fill: var(--green); }
.s-coin-t { fill: var(--surface); font-weight: 700; font-size: 15px; }
.s-arrow { stroke: var(--muted); stroke-width: 1.5; fill: none; stroke-dasharray: 4 3; }
.s-dbl { stroke: var(--green); stroke-width: 1.5; fill: none; }

@media (prefers-reduced-motion: reduce) { .btn, .btn:hover, .btn:active { transform: none; } }