:root {
  --bg: #f5f6f8; --panel: #ffffff; --panel-2: #f9fafb; --text: #111827; --muted: #6b7280;
  --border: #e5e7eb; --accent: #2563eb; --accent-soft: #dbeafe; --accent-text: #ffffff;
  --legacy: #94a3b8; --ai: #2563eb; --actual: #f59e0b; --good: #059669; --bad: #dc2626;
  --good-soft: #d1fae5; --bad-soft: #fee2e2; --warn-soft: #fef3c7; --shadow: 0 1px 2px rgba(0,0,0,.05);
  --radius: 10px;
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 14px; color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115; --panel: #171a21; --panel-2: #1d212a; --text: #e5e7eb; --muted: #9ca3af;
    --border: #2a2f3a; --accent: #3b82f6; --accent-soft: #1e3a8a55; --legacy: #64748b; --ai: #3b82f6;
    --actual: #fbbf24; --good: #34d399; --bad: #f87171; --good-soft: #064e3b88; --bad-soft: #7f1d1d88;
    --warn-soft: #78350f88; --shadow: none; color-scheme: dark;
  }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); }
a { color: var(--accent); text-decoration: none; }
h1 { font-size: 20px; margin: 0; }
h2 { font-size: 16px; margin: 0 0 12px; }
h3 { font-size: 14px; margin: 0 0 8px; }
.muted { color: var(--muted); }
.small { font-size: 12px; }
.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.good { color: var(--good); } .bad { color: var(--bad); }

/* layout */
.shell { display: grid; grid-template-columns: 220px 1fr; min-height: 100vh; }
.side { background: var(--panel); border-right: 1px solid var(--border); padding: 16px 12px; display: flex; flex-direction: column; gap: 4px; position: sticky; top: 0; height: 100vh; }
.brand { display: flex; align-items: center; gap: 8px; font-weight: 700; padding: 4px 8px 16px; }
.brand .logo { width: 26px; height: 26px; border-radius: 6px; background: var(--accent); display: grid; place-items: center; color: #fff; font-size: 13px; }
.nav a { display: block; padding: 8px 10px; border-radius: 8px; color: var(--text); }
.nav a:hover { background: var(--panel-2); }
.nav a.active { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
.side .me { margin-top: auto; border-top: 1px solid var(--border); padding: 12px 8px 0; font-size: 12px; }
.main { padding: 24px 28px; min-width: 0; }
.topbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 20px; flex-wrap: wrap; }
.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.grid { display: grid; gap: 16px; }
.g2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.g3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.kpis { display: grid; grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); gap: 12px; margin-bottom: 16px; }
.card { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; box-shadow: var(--shadow); min-width: 0; }
.kpi .label { color: var(--muted); font-size: 12px; }
.kpi .value { font-size: 20px; font-weight: 700; margin-top: 4px; font-variant-numeric: tabular-nums; }
.kpi .sub { font-size: 12px; color: var(--muted); margin-top: 2px; }
.section { margin-bottom: 16px; }

/* tables */
.tbl-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 8px 10px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: middle; }
th { font-size: 12px; color: var(--muted); font-weight: 600; background: var(--panel-2); position: sticky; top: 0; }
tr.click { cursor: pointer; } tr.click:hover td { background: var(--panel-2); }
tr.selected td { background: var(--accent-soft); }
tfoot td { font-weight: 700; background: var(--panel-2); }

/* controls */
button, .btn { font: inherit; border: 1px solid var(--border); background: var(--panel); color: var(--text); padding: 7px 12px; border-radius: 8px; cursor: pointer; display: inline-flex; gap: 6px; align-items: center; }
button:hover { background: var(--panel-2); }
button.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }
button.primary:hover { filter: brightness(1.08); }
button.danger { color: var(--bad); }
button.ghost { border-color: transparent; background: transparent; padding: 4px 8px; }
button:disabled { opacity: .5; cursor: not-allowed; }
input, select, textarea { font: inherit; color: var(--text); background: var(--panel); border: 1px solid var(--border); border-radius: 8px; padding: 7px 9px; width: 100%; }
textarea { min-height: 120px; font-family: ui-monospace, Menlo, monospace; font-size: 12px; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent-soft); border-color: var(--accent); }
label { display: block; font-size: 12px; color: var(--muted); margin-bottom: 4px; }
.field { margin-bottom: 12px; }
.fields { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 0 12px; }
.inline-input { width: 90px; padding: 4px 6px; text-align: right; }

.badge { display: inline-block; padding: 2px 8px; border-radius: 99px; font-size: 11px; font-weight: 600; background: var(--panel-2); border: 1px solid var(--border); }
.badge.bozza { background: var(--warn-soft); }
.badge.baseline { background: var(--accent-soft); color: var(--accent); }
.badge.in_corso { background: var(--accent-soft); }
.badge.chiuso { background: var(--good-soft); color: var(--good); }
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--border); margin-bottom: 16px; flex-wrap: wrap; }
.tabs a { padding: 8px 12px; color: var(--muted); border-bottom: 2px solid transparent; }
.tabs a.active { color: var(--accent); border-color: var(--accent); font-weight: 600; }
.hint { background: var(--panel-2); border: 1px dashed var(--border); border-radius: 8px; padding: 10px 12px; font-size: 12px; color: var(--muted); }
.suggest { background: var(--accent-soft); border-radius: 8px; padding: 12px; font-size: 13px; }
.suggest .big { font-size: 18px; }
.legend { display: flex; gap: 14px; font-size: 12px; color: var(--muted); flex-wrap: wrap; }
.legend i { display: inline-block; width: 10px; height: 10px; border-radius: 2px; margin-right: 5px; vertical-align: -1px; }
.chart svg { width: 100%; height: auto; display: block; }
.chart text { fill: var(--muted); font-size: 11px; }
.chart .grid-line { stroke: var(--border); }
.empty { padding: 30px; text-align: center; color: var(--muted); }

/* login */
.login { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.login .card { width: 100%; max-width: 380px; padding: 28px; }

/* modal */
.modal-bg { position: fixed; inset: 0; background: rgba(0,0,0,.45); display: flex; align-items: flex-start; justify-content: center; padding: 40px 16px; overflow-y: auto; z-index: 50; }
.modal { background: var(--panel); border-radius: 12px; width: 100%; max-width: 760px; padding: 22px; border: 1px solid var(--border); }
.modal.wide { max-width: 980px; }
.modal-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; }
.modal-foot { display: flex; justify-content: flex-end; gap: 8px; margin-top: 16px; padding-top: 12px; border-top: 1px solid var(--border); }
.usage-row { display: grid; grid-template-columns: 2fr repeat(3, 1fr) auto; gap: 8px; align-items: end; padding: 10px; border: 1px solid var(--border); border-radius: 8px; margin-bottom: 8px; }
#toast { position: fixed; bottom: 20px; right: 20px; z-index: 60; }
#toast .t { background: var(--text); color: var(--bg); padding: 10px 14px; border-radius: 8px; margin-top: 8px; max-width: 420px; box-shadow: 0 4px 14px rgba(0,0,0,.2); }
#toast .t.err { background: var(--bad); color: #fff; }

@media (max-width: 900px) {
  .shell { grid-template-columns: 1fr; }
  .side { position: static; height: auto; flex-direction: row; flex-wrap: wrap; align-items: center; }
  .side .brand { padding: 4px 8px; }
  .nav { display: flex; flex-wrap: wrap; gap: 2px; }
  .side .me { margin-top: 0; border-top: 0; padding: 0 8px; }
  .main { padding: 16px; }
  .g2, .g3 { grid-template-columns: 1fr; }
  .usage-row { grid-template-columns: 1fr 1fr; }
}