:root {
    --bg: #f5f6f8; --card: #fff; --text: #1f2933; --muted: #6b7280; --border: #e2e5ea;
    --primary: #2563eb; --ok: #15803d; --err: #b91c1c; --warn: #b45309;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; background: var(--bg); color: var(--text); }
a { color: var(--primary); }

.topbar { display: flex; flex-wrap: wrap; align-items: center; gap: .75rem; padding: .7rem 1.25rem; background: #111827; }
.brand { color: #fff; font-weight: 700; text-decoration: none; margin-right: auto; }
nav { display: flex; flex-wrap: wrap; gap: .25rem; }
nav a { color: #d1d5db; text-decoration: none; padding: .35rem .7rem; border-radius: 6px; }
nav a:hover, nav a.active { background: #374151; color: #fff; }
.count { background: #ef4444; color: #fff; border-radius: 999px; padding: 0 .45rem; font-size: .75rem; }

main { max-width: 1280px; margin: 0 auto; padding: 1.25rem 16px; }
h1 { font-size: 1.4rem; margin: .5rem 0 1rem; }
h2 { font-size: 1.1rem; margin: 0 0 .75rem; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 1rem 1.25rem; margin-bottom: 1rem; }
.grid { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); margin-bottom: 1rem; }
.grid > .card { margin-bottom: 0; }
.big { font-size: 1.8rem; font-weight: 700; }
.muted { color: var(--muted); font-size: .85rem; }
.login { max-width: 380px; margin: 2rem auto; }
.highlight { outline: 3px solid var(--primary); }

.flash { padding: .6rem 1rem; border-radius: 8px; margin-bottom: 1rem; }
.flash.ok { background: #dcfce7; color: var(--ok); }
.flash.err { background: #fee2e2; color: var(--err); }

label { display: block; font-size: .85rem; color: var(--muted); margin-bottom: .2rem; }
input, select, textarea { font: inherit; padding: .45rem .6rem; border: 1px solid var(--border); border-radius: 6px; width: 100%; background: #fff; color: inherit; }
input[type=checkbox] { width: auto; margin-right: .4rem; }
form.inline { display: inline; }
.row { display: flex; flex-wrap: wrap; gap: .75rem; align-items: flex-end; }
.row > div { flex: 1 1 160px; }

button, .btn { font: inherit; padding: .45rem .9rem; border: 0; border-radius: 6px; background: var(--primary); color: #fff; cursor: pointer; text-decoration: none; display: inline-block; }
button.secondary, .btn.secondary { background: #e5e7eb; color: var(--text); }
button.ok { background: var(--ok); }
button.danger { background: var(--err); }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: .5rem; border-bottom: 1px solid var(--border); vertical-align: top; }
th { font-size: .8rem; color: var(--muted); font-weight: 600; }
.table-wrap { overflow-x: auto; }
tr.unread td { font-weight: 600; }

.badge { font-size: .75rem; padding: .1rem .55rem; border-radius: 999px; white-space: nowrap; }
.st-pending { background: #fef3c7; color: var(--warn); }
.st-approved { background: #dcfce7; color: var(--ok); }
.st-rejected { background: #fee2e2; color: var(--err); }
.st-cancelled { background: #e5e7eb; color: var(--muted); }

/* Livelli di assenza */
.lvl-zero { background: #fff; }
.lvl-low { background: #dcfce7; }
.lvl-mid { background: #fef3c7; }
.lvl-high { background: #fecaca; }
.impact { padding: .5rem .75rem; border-radius: 8px; border: 1px solid var(--border); margin-bottom: .4rem; }

.heat th, .heat td { text-align: center; padding: .3rem .2rem; min-width: 2.6rem; font-size: .78rem; border: 1px solid var(--border); }
.heat th:first-child, .heat td:first-child { text-align: left; min-width: 8rem; position: sticky; left: 0; background: var(--card); }
.heat th.today { background: #dbeafe; }
.heat td.off { background: repeating-linear-gradient(45deg, #f3f4f6, #f3f4f6 4px, #e5e7eb 4px, #e5e7eb 8px); }
.heat td.lvl-high { font-weight: 700; }