:root{
  --bg:#f4f5f7; --card:#fff; --ink:#1a1d21; --muted:#6b7280; --line:#e5e7eb;
  --cbn:#e8effb; --cbn-h:#2563eb;      /* copie b/n  - blu */
  --ccol:#fdf0e6; --ccol-h:#d97706;    /* copie colore - ambra */
  --sbn:#eaf6ee; --sbn-h:#059669;      /* stampe b/n - verde */
  --scol:#f3ecfb; --scol-h:#7c3aed;    /* stampe colore - viola */
  --pos:#047857; --pos-bg:#e7f6ee; --neg:#b91c1c; --neg-bg:#fdeaea; --zero:#9ca3af;
}
*{box-sizing:border-box}
body{margin:0;font:14px/1.4 -apple-system,BlinkMacSystemFont,'Segoe UI',Inter,Roboto,sans-serif;background:var(--bg);color:var(--ink)}

/* Login */
.login-page{display:flex;align-items:center;justify-content:center;min-height:100vh}
.login-box{background:var(--card);padding:32px;border-radius:14px;box-shadow:0 6px 30px rgba(0,0,0,.08);width:320px;text-align:center}
.login-box h1{margin:0 0 4px;font-size:20px}
.login-box .muted{color:var(--muted);margin:0 0 18px;font-size:13px}
.login-box input{width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:8px;font-size:15px;margin-bottom:12px}
.login-box button{width:100%;padding:11px;border:0;border-radius:8px;background:var(--ink);color:#fff;font-size:15px;cursor:pointer}
.errore{background:var(--neg-bg);color:var(--neg);padding:8px;border-radius:8px;margin-bottom:12px;font-size:13px}

/* Header */
.top{display:flex;align-items:center;gap:24px;background:var(--card);padding:14px 24px;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5;flex-wrap:wrap}
.brand{font-weight:700;font-size:16px}.brand span{color:var(--muted);font-weight:500}
.top nav{display:flex;gap:6px}
.top nav a{padding:7px 12px;border-radius:8px;color:var(--muted);text-decoration:none;font-weight:500}
.top nav a.attivo{background:var(--bg);color:var(--ink)}
.top .meta{margin-left:auto;color:var(--muted);font-size:13px}
.top .meta a{color:var(--muted)}

main{padding:22px 24px;max-width:100%}
h1{font-size:20px;margin:0 0 16px}h1 small{color:var(--muted);font-weight:500;font-size:13px;margin-left:8px}

/* Filtri */
.filtri{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin-bottom:16px}
.filtri input[type=search]{flex:1;min-width:220px;padding:9px 12px;border:1px solid var(--line);border-radius:8px}
.filtri label{color:var(--muted);font-size:13px;display:flex;gap:6px;align-items:center}
.filtri input[type=date]{padding:8px;border:1px solid var(--line);border-radius:8px}
.filtri button{padding:9px 16px;border:0;border-radius:8px;background:var(--ink);color:#fff;cursor:pointer}
.filtri .reset{color:var(--muted);text-decoration:none;font-size:13px}

/* Tabella */
.tabella-wrap{overflow:auto;background:var(--card);border:1px solid var(--line);border-radius:12px}
table.letture{border-collapse:collapse;width:100%;font-size:13px;white-space:nowrap}
table.letture th,table.letture td{padding:8px 10px;text-align:right;border-bottom:1px solid var(--line)}
table.letture .gruppi th{font-size:11px;text-transform:uppercase;letter-spacing:.04em;text-align:center;padding:6px}
.g-cbn{background:var(--cbn);color:var(--cbn-h)}
.g-ccol{background:var(--ccol);color:var(--ccol-h)}
.g-sbn{background:var(--sbn);color:var(--sbn-h)}
.g-scol{background:var(--scol);color:var(--scol-h)}
table.letture .testata th{background:#fafbfc;color:var(--muted);font-weight:600;position:sticky;top:0}
table.letture td.cliente,table.letture td.mono,table.letture th:nth-child(-n+3){text-align:left}
td.cliente{font-weight:600}
td.mono{font-family:ui-monospace,Menlo,monospace;color:var(--muted)}
td.data{color:var(--muted)}
tr:hover td{background:#fbfcfd}

/* colonne diff colorate per gruppo (sfondo tenue) */
td.c-diff{font-weight:700}
.c-pos{color:var(--pos);background:var(--pos-bg)}
.c-neg{color:var(--neg);background:var(--neg-bg)}
.c-zero{color:var(--zero)}
.c-null{color:#cbd5e1}

td.nota{text-align:left;color:var(--muted);white-space:normal;max-width:220px}
td.nota.n-base{color:#6b7280}
td.nota.n-neg{color:var(--neg);font-weight:600}
.vuoto{text-align:center;color:var(--muted);padding:26px}

.legenda{color:var(--muted);font-size:12px;margin-top:12px;display:flex;gap:14px;flex-wrap:wrap}
.lg{padding:1px 8px;border-radius:6px;font-weight:600}
.legenda .c-pos{color:var(--pos);background:var(--pos-bg)}
.legenda .c-neg{color:var(--neg);background:var(--neg-bg)}
.legenda .n-base{color:#6b7280;background:#eef0f2}

/* Logo */
.brand{display:flex;align-items:center;gap:10px}
.brand .logo{height:26px;width:auto;display:block}
.brand span{color:var(--muted);font-weight:500;font-size:15px}
.logo-login{height:44px;width:auto;margin:0 auto 6px;display:block}

/* Riga TOTALE + tabella totali */
tfoot tr.totale td{background:#f8fafc;border-top:2px solid #cbd5e1;font-weight:700;padding:11px 10px;position:sticky;bottom:0}
tfoot tr.totale td:first-child{text-align:left;letter-spacing:.03em;font-size:12px;text-transform:uppercase;color:var(--muted)}
tfoot tr.totale .dettaglio{text-transform:none;letter-spacing:0;font-weight:500}
tfoot tr.totale td.c-diff{font-size:14px}

/* Avviso semantica filtro data */
.nota-filtro{background:#fffbeb;border:1px solid #fde68a;color:#92400e;font-size:12px;
  padding:8px 12px;border-radius:8px;margin:-6px 0 16px}
.nota-filtro i{font-style:italic}