:root {
  --bg: #fafaf9; --surface: #ffffff; --ink: #111111; --muted: #6b6b6b; --line: #e7e5e4;
  --accent: #111111; --accent-ink: #ffffff; --accent-soft: #fef3c7; --amber: #f59e0b;
  --good: #15803d; --bad: #b91c1c; --warn: #b45309; --focus: #b45309;
  --radius: 12px; color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f0f0f; --surface: #1a1a1a; --ink: #f5f5f4; --muted: #a8a29e; --line: #2e2e2e;
    --accent: #f5f5f4; --accent-ink: #111111; --accent-soft: #3a2c0a; --amber: #fbbf24;
    --good: #4ade80; --bad: #f87171; --warn: #fbbf24; --focus: #fbbf24; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0f0f0f; --surface: #1a1a1a; --ink: #f5f5f4; --muted: #a8a29e; --line: #2e2e2e;
  --accent: #f5f5f4; --accent-ink: #111111; --accent-soft: #3a2c0a; --amber: #fbbf24;
  --good: #4ade80; --bad: #f87171; --warn: #fbbf24; --focus: #fbbf24; color-scheme: dark;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 16px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  padding-bottom: env(safe-area-inset-bottom);
}
.wrap { max-width: 640px; margin: 0 auto; padding: 0 16px; }
a { color: var(--accent); }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }

.top { padding: calc(20px + env(safe-area-inset-top)) 0 8px; }
.brand { font-weight: 700; font-size: 14px; letter-spacing: .01em; }
.bolt { margin-right: 2px; color: var(--amber); }
h1 { font-size: 26px; line-height: 1.2; margin: 12px 0 8px; letter-spacing: -.01em; }
h2 { font-size: 17px; margin: 0 0 12px; }
.lead { margin: 0 0 8px; color: var(--muted); }
.fresh { margin: 0 0 8px; font-size: 13px; color: var(--muted); }

.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; margin: 12px 0; }
fieldset.card { min-width: 0; }
.toggle { padding: 0 4px; font-size: 17px; }
.toggle label { display: inline-flex; gap: 8px; align-items: center; cursor: pointer; }
.toggle input { width: 20px; height: 20px; accent-color: var(--accent); }
.commodity.off .body { display: none; }

.row { display: flex; gap: 12px; flex-wrap: wrap; }
.grow { flex: 1 1 160px; }
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 12px; }
@media (max-width: 420px) { .grid { grid-template-columns: 1fr; } }

.field { display: flex; flex-direction: column; gap: 4px; margin: 0 0 8px; font-size: 14px; }
.field span { color: var(--muted); }
.field em { font-style: normal; }
input, select {
  font: inherit; font-size: 16px; color: var(--ink); background: var(--bg);
  border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; width: 100%; min-height: 44px;
}
input[aria-invalid="true"] { border-color: var(--bad); }
.hint { font-size: 13px; color: var(--muted); margin: 4px 0 0; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 4px 0 4px; }
.chips button {
  font: inherit; font-size: 13px; padding: 6px 12px; min-height: 36px; border-radius: 999px;
  border: 1px solid var(--line); background: var(--bg); color: var(--ink); cursor: pointer;
}
.chips button[aria-pressed="true"] { background: var(--accent-soft); border-color: var(--amber); }

details.current { margin-top: 12px; border-top: 1px solid var(--line); padding-top: 12px; }
details.current summary { cursor: pointer; font-weight: 600; font-size: 15px; }
.opt { font-weight: 400; color: var(--muted); font-size: 13px; }

.primary {
  display: block; width: 100%; min-height: 48px; margin: 16px 0; border: 0; border-radius: 10px;
  background: var(--accent); color: var(--accent-ink); font: inherit; font-weight: 700; font-size: 17px; cursor: pointer;
}
.error { color: var(--bad); font-size: 14px; margin: 8px 0 0; }

/* Risultati */
.result h2 { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; }
.result .sub { font-size: 14px; color: var(--muted); margin: -6px 0 12px; }
.verdict { font-size: 15px; padding: 12px; border-radius: 10px; background: var(--accent-soft); border-left: 4px solid var(--amber); margin: 0 0 12px; }
.verdict.none { background: var(--bg); border-left-color: var(--line); }
.offer { border: 1px solid var(--line); border-radius: 10px; padding: 14px; margin: 0 0 10px; }
.offer-head { display: flex; justify-content: space-between; gap: 12px; align-items: flex-start; }
.offer-name { font-weight: 650; font-size: 16px; line-height: 1.3; }
.offer-site { font-size: 12px; color: var(--muted); margin-top: 2px; word-break: break-all; }
.saving { text-align: right; white-space: nowrap; }
.saving b { display: block; font-size: 22px; line-height: 1.1; }
.saving small { font-size: 12px; color: var(--muted); }
.pos { color: var(--good); } .neg { color: var(--bad); } .zero { color: var(--muted); }
.facts { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 2px 12px; margin: 10px 0 0; padding-top: 8px; border-top: 1px solid var(--line); font-size: 14px; }
.facts dt { color: var(--muted); } .facts dd { margin: 0; text-align: right; }
.warn { color: var(--warn); font-size: 13px; margin: 8px 0 0; }
.notes { font-size: 12px; color: var(--muted); margin: 8px 0 0; }
.go { display: inline-block; margin-top: 12px; padding: 9px 14px; border-radius: 8px; background: var(--accent); color: var(--accent-ink); text-decoration: none; font-size: 14px; font-weight: 600; }

.rules ul { margin: 0 0 8px; padding: 0; list-style: none; }
.rules li { padding-left: 24px; position: relative; margin: 6px 0; }
.rules li::before { content: "✓"; position: absolute; left: 0; color: var(--good); font-weight: 700; }
.rules p, .soon p { margin: 0; color: var(--muted); font-size: 14px; }
.tag { font-size: 12px; font-weight: 600; background: var(--accent-soft); border: 1px solid var(--amber); color: var(--ink); padding: 2px 8px; border-radius: 999px; vertical-align: 2px; }
.foot { font-size: 12px; color: var(--muted); padding: 8px 0 32px; }

.linkish { background: none; border: 0; padding: 4px 0; font: inherit; font-size: 14px; color: var(--accent); text-decoration: underline; text-underline-offset: 3px; cursor: pointer; min-height: 32px; }
.estimate { margin: 6px 0 0; padding: 12px; border-radius: 10px; background: var(--bg); }
.estimate-label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 6px; }

.upload { margin-top: 12px; }
.upload-btn { display: inline-flex; align-items: center; gap: 8px; min-height: 44px; padding: 10px 14px; border-radius: 10px;
  border: 1px dashed var(--amber); background: var(--accent-soft); color: var(--ink); font-weight: 600; font-size: 15px; cursor: pointer; }
.upload-btn input { position: absolute; width: 1px; height: 1px; opacity: 0; }
.upload-btn:focus-within { outline: 2px solid var(--focus); outline-offset: 2px; }
.bill-result { font-size: 14px; margin-top: 8px; }
.bill-result ul { margin: 6px 0; padding-left: 18px; }
.bill-result .ok { color: var(--good); }
.bill-result .ko { color: var(--warn); }
input.filled, select.filled { border-color: var(--amber); box-shadow: 0 0 0 2px color-mix(in srgb, var(--amber) 30%, transparent); }