:root {
  --bg: #f4f5f7; --card: #ffffff; --text: #1b1f24; --muted: #6a7480; --line: #dde1e6;
  --brand: #1f3a5f; --brand-text: #ffffff;
  --ok: #1d7a46; --ok-bg: #e3f4ea; --warn: #8a5a00; --warn-bg: #fff2d6;
  --err: #b3261e; --err-bg: #fde8e6; --info: #1f4e8c; --info-bg: #e4eefb;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14171b; --card: #1e2329; --text: #eceff3; --muted: #9aa5b1; --line: #343b44;
    --brand: #5b8fd6; --brand-text: #0c1117;
    --ok: #62d08f; --ok-bg: #173324; --warn: #f0c060; --warn-bg: #3a2e12;
    --err: #ff8a80; --err-bg: #3d1f1d; --info: #8fb8f0; --info-bg: #1b2a40;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.4 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; }
body.no-scroll { overflow: hidden; }
.caricamento { text-align: center; margin-top: 30vh; color: var(--muted); }

.shell { max-width: 760px; margin: 0 auto; min-height: 100vh; padding: calc(env(safe-area-inset-top) + 10px) 12px 96px; }
.topbar { display: flex; align-items: center; justify-content: space-between; margin: 4px 0 12px; }
.topbar h1 { font-size: 22px; margin: 0; }
.nav { position: fixed; left: 0; right: 0; bottom: 0; background: var(--card); border-top: 1px solid var(--line);
  display: flex; padding-bottom: env(safe-area-inset-bottom); z-index: 10; }
.nav button { flex: 1; border: 0; background: none; color: var(--muted); padding: 12px 4px; font-size: 14px; font-weight: 600; }
.nav button.on { color: var(--brand); box-shadow: inset 0 3px 0 var(--brand); }

h2 { font-size: 18px; margin: 18px 0 8px; }
h3 { font-size: 15px; margin: 14px 0 6px; color: var(--muted); text-transform: uppercase; letter-spacing: .03em; }
.muted { color: var(--muted); font-size: 14px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; margin: 8px 0; }
button.card { width: 100%; text-align: left; color: inherit; font: inherit; cursor: pointer; display: block; }
.item-top { display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.kpis { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin: 8px 0; }
.kpi { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 10px 12px; }
.kpi .v { font-size: 20px; font-weight: 700; }
.badge { display: inline-block; font-size: 12px; font-weight: 700; padding: 2px 8px; border-radius: 999px; white-space: nowrap; }
.badge.ok { background: var(--ok-bg); color: var(--ok); }
.badge.warn { background: var(--warn-bg); color: var(--warn); }
.badge.grey { background: var(--line); color: var(--muted); }

.alert { border-radius: 10px; padding: 10px 12px; margin: 8px 0; font-size: 15px; }
.alert.err { background: var(--err-bg); color: var(--err); }
.alert.warn { background: var(--warn-bg); color: var(--warn); }
.alert.info { background: var(--info-bg); color: var(--info); }
.alert.ok { background: var(--ok-bg); color: var(--ok); }

label { display: block; font-size: 14px; font-weight: 600; margin: 10px 0 0; color: var(--muted); }
input, select, textarea { display: block; width: 100%; margin-top: 4px; padding: 11px 12px; font-size: 16px;
  border: 1px solid var(--line); border-radius: 10px; background: var(--card); color: var(--text); }
input:focus, select:focus { outline: 2px solid var(--brand); outline-offset: 0; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.grid3 { display: grid; grid-template-columns: 1fr 1.4fr 1fr; gap: 8px; }
.f-acq[data-crit="valore"] .peso-lbl, .f-acq[data-crit="quantita"] .peso-lbl { display: none; }
.f-acq[data-crit="valore"] .grid3, .f-acq[data-crit="quantita"] .grid3 { grid-template-columns: 1fr 1.4fr; }
.seg { display: flex; gap: 6px; margin-top: 4px; }
.seg button { flex: 1; padding: 10px 4px; border: 1px solid var(--line); background: var(--card); color: var(--text);
  border-radius: 10px; font-size: 15px; font-weight: 600; }
.seg button.on { background: var(--brand); color: var(--brand-text); border-color: var(--brand); }

.btn { display: inline-block; border: 1px solid var(--line); background: var(--card); color: var(--text);
  padding: 12px 16px; border-radius: 10px; font-size: 16px; font-weight: 600; cursor: pointer; }
.btn:disabled { opacity: .55; }
.btn-primary { background: var(--brand); color: var(--brand-text); border-color: var(--brand); }
.btn-danger { color: var(--err); }
.btn-block { display: block; width: 100%; margin-top: 14px; }
.btn-row { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 10px; }
.link-btn { background: none; border: 0; padding: 4px 0; color: var(--info); font-weight: 700; font-size: 14px; cursor: pointer; text-decoration: underline; }
.icon-btn { background: none; border: 0; font-size: 22px; color: var(--muted); padding: 4px 10px; cursor: pointer; }

.overlay { position: fixed; inset: 0; background: rgba(0,0,0,.45); z-index: 50; display: flex; align-items: flex-end; justify-content: center; }
.sheet { background: var(--bg); width: 100%; max-width: 760px; max-height: 94vh; border-radius: 18px 18px 0 0; display: flex; flex-direction: column; }
.sheet-head { display: flex; justify-content: space-between; align-items: center; padding: 10px 14px 6px 16px; border-bottom: 1px solid var(--line); }
.sheet-head h2 { margin: 0; }
.sheet-body { overflow-y: auto; padding: 8px 14px calc(env(safe-area-inset-bottom) + 24px); }
.errbox { background: var(--err-bg); color: var(--err); border-radius: 10px; padding: 10px 12px; margin-top: 12px; font-size: 15px; }
.errbox ul { margin: 0; padding-left: 18px; }
.riga { border: 1px solid var(--line); border-radius: 12px; padding: 10px; margin: 10px 0; background: var(--card); }
.riga select { margin-top: 0; }
.costo-finale { margin-top: 6px; font-weight: 600; }
.anteprima { background: var(--info-bg); color: var(--info); border-radius: 10px; padding: 10px 12px; margin-top: 12px; font-size: 15px; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 6px 4px; border-bottom: 1px solid var(--line); vertical-align: top; }
td.num, th.num { text-align: right; white-space: nowrap; }

#toasts { position: fixed; left: 10px; right: 10px; top: calc(env(safe-area-inset-top) + 10px); z-index: 100; display: flex; flex-direction: column; gap: 8px; pointer-events: none; }
.toast { pointer-events: auto; border-radius: 10px; padding: 12px 14px; display: flex; justify-content: space-between; align-items: flex-start; gap: 10px;
  box-shadow: 0 4px 16px rgba(0,0,0,.25); max-width: 760px; margin: 0 auto; width: 100%; font-weight: 600; }
.toast.ok { background: var(--ok-bg); color: var(--ok); }
.toast.err { background: var(--err-bg); color: var(--err); }
.toast button { background: none; border: 0; color: inherit; font-size: 18px; cursor: pointer; }
.login { max-width: 380px; margin: 12vh auto 0; padding: 0 16px; }
.login h1 { text-align: center; }
.var-su { color: var(--warn); font-weight: 600; }
.var-giu { color: var(--ok); font-weight: 600; }
.listino-hint { margin-top: 4px; }
textarea { font-family: inherit; }