:root {
  --page: #0d0d0d;
  --surface: #16161a;
  --surface-2: #1f1f24;
  --ink: #ffffff;
  --ink-2: #c3c2b7;
  --muted: #898781;
  --grid: #2c2c2a;
  --axis: #383835;
  --series: #d95926;
  --accent: #3987e5;
  --good: #0ca30c;
  --critical: #d03b3b;
  --border: rgba(255, 255, 255, 0.1);
  --radius: 12px;
  --font: system-ui, -apple-system, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font-family: var(--font);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); }

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 20px; }

/* ---------------------------------------------------------------- header */

header.site {
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: rgba(13, 13, 13, 0.9);
  backdrop-filter: blur(8px);
  z-index: 10;
}
header.site .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 16px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 650; letter-spacing: -0.01em; }
.brand .dot { width: 10px; height: 10px; border-radius: 50%; background: var(--series); flex: none; }
.brand span.sub { color: var(--muted); font-weight: 400; font-size: 0.85rem; }
nav a { color: var(--ink-2); text-decoration: none; margin-left: 20px; font-size: 0.92rem; }
nav a:hover { color: var(--ink); }

/* ---------------------------------------------------------------- hero */

.hero { padding: 64px 0 40px; }
.hero h1 {
  font-size: clamp(2rem, 5vw, 3.1rem);
  line-height: 1.1;
  margin: 0 0 16px;
  letter-spacing: -0.025em;
}
.hero h1 em { font-style: normal; color: var(--series); }
.hero p { color: var(--ink-2); font-size: 1.08rem; max-width: 62ch; margin: 0 0 12px; }

/* ---------------------------------------------------------------- tiles */

.tiles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 12px;
  margin: 32px 0;
}
.tile {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 20px;
}
.tile .label {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--muted);
  margin-bottom: 8px;
}
.tile .value { font-size: 1.75rem; font-weight: 620; letter-spacing: -0.02em; line-height: 1.15; }
.tile .value.sm { font-size: 1.35rem; }
/* i prezzi hanno 8 decimali: servono cifre a larghezza fissa per allinearli
   fra riquadri, e un corpo piu' piccolo perche' non vadano a capo */
.tile .value.price { font-size: 1.32rem; font-variant-numeric: tabular-nums; letter-spacing: -0.01em; }
.tile .meta { font-size: 0.82rem; color: var(--muted); margin-top: 6px; }
.up { color: var(--good); }
.down { color: var(--critical); }

.unit-note {
  color: var(--muted);
  font-size: 0.88rem;
  max-width: 78ch;
  margin: -12px 0 8px;
  line-height: 1.6;
}
.unit-note strong { color: var(--ink-2); font-weight: 600; }

/* ---------------------------------------------------------------- card + chart */

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  margin: 24px 0;
}
.card > h2 { margin: 0 0 4px; font-size: 1.18rem; letter-spacing: -0.01em; }
.card > .caption { color: var(--muted); font-size: 0.87rem; margin: 0 0 18px; }

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-bottom: 18px;
}
.controls .spacer { flex: 1; }
.seg { display: inline-flex; background: var(--surface-2); border-radius: 8px; padding: 3px; gap: 2px; }
.seg button {
  border: 0;
  background: transparent;
  color: var(--ink-2);
  font: inherit;
  font-size: 0.85rem;
  padding: 6px 13px;
  border-radius: 6px;
  cursor: pointer;
  min-height: 32px;
}
.seg button:hover { color: var(--ink); }
.seg button[aria-pressed="true"] { background: var(--page); color: var(--ink); }

.chart-box { position: relative; height: 380px; transition: opacity 0.15s; }

/* Durante il refetch si tiene il render precedente a opacita' ridotta:
   niente skeleton, niente salto di layout. */
.chart-box.refetching { opacity: 0.55; }

.live { display: inline-flex; align-items: center; gap: 7px; color: var(--muted); font-size: 0.8rem; }
.live .pulse {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--good);
  box-shadow: 0 0 0 0 rgba(12, 163, 12, 0.6);
  animation: pulse 2.4s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(12, 163, 12, 0.5); }
  70% { box-shadow: 0 0 0 7px rgba(12, 163, 12, 0); }
  100% { box-shadow: 0 0 0 0 rgba(12, 163, 12, 0); }
}
@media (prefers-reduced-motion: reduce) {
  .live .pulse { animation: none; }
}

/* tooltip */
#tt, .tt {
  position: absolute;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.12s;
  background: var(--page);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 11px;
  font-size: 0.85rem;
  white-space: nowrap;
  transform: translate(-50%, -120%);
  z-index: 5;
}
#tt .d, .tt .d { color: var(--muted); font-size: 0.78rem; }
#tt .p, .tt .p { font-weight: 620; display: flex; align-items: center; gap: 6px; }
.tt .swatch { width: 8px; height: 8px; border-radius: 50%; flex: none; }

/* table view */
table.data { width: 100%; border-collapse: collapse; font-size: 0.88rem; font-variant-numeric: tabular-nums; }
table.data th, table.data td { text-align: right; padding: 9px 10px; border-bottom: 1px solid var(--grid); }
table.data th:first-child, table.data td:first-child { text-align: left; }
table.data th { color: var(--muted); font-weight: 500; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.05em; }
table.data td.num { font-variant-numeric: tabular-nums; }
.scroll-x { overflow-x: auto; }
#table-view[hidden] { display: none; }

/* ---------------------------------------------------------------- notes */

.note {
  border-left: 2px solid var(--axis);
  padding: 2px 0 2px 16px;
  margin: 16px 0;
  color: var(--ink-2);
  font-size: 0.94rem;
}
.note strong { color: var(--ink); font-weight: 600; }

.callout {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--series);
  border-radius: 8px;
  padding: 14px 18px;
  color: var(--ink-2);
  font-size: 0.92rem;
}
.callout.warn { border-left-color: #fab219; }

/* ---------------------------------------------------------------- form */

form.stack { display: grid; gap: 14px; }
.row { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; }
label { display: block; font-size: 0.8rem; color: var(--muted); margin-bottom: 5px; }
input, textarea {
  width: 100%;
  background: var(--page);
  border: 1px solid var(--axis);
  border-radius: 8px;
  color: var(--ink);
  font: inherit;
  font-size: 0.95rem;
  padding: 10px 12px;
  min-height: 42px;
}
input:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: transparent; }
button.primary {
  background: var(--series);
  color: #fff;
  border: 0;
  border-radius: 8px;
  font: inherit;
  font-weight: 600;
  padding: 11px 20px;
  min-height: 44px;
  cursor: pointer;
}
button.primary:hover { filter: brightness(1.1); }
button.link {
  background: none;
  border: 0;
  color: var(--muted);
  font: inherit;
  font-size: 0.85rem;
  cursor: pointer;
  padding: 4px 6px;
  min-height: 28px;
}
button.link:hover { color: var(--critical); }

/* ---------------------------------------------------------------- login */

.login-shell { min-height: 100dvh; display: grid; place-items: center; padding: 20px; }
.login-card { width: 100%; max-width: 380px; }
.err { color: var(--critical); font-size: 0.88rem; }

/* ---------------------------------------------------------------- footer */

footer.site {
  border-top: 1px solid var(--border);
  margin-top: 56px;
  padding: 28px 0 40px;
  color: var(--muted);
  font-size: 0.85rem;
}
footer.site p { margin: 0 0 8px; max-width: 80ch; }

@media (max-width: 620px) {
  .chart-box { height: 300px; }
  .hero { padding: 40px 0 24px; }
}