@font-face {
  font-family: 'IBM Plex Mono';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url(fonts/ibm-plex-mono-400.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'IBM Plex Mono';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url(fonts/ibm-plex-mono-500.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'IBM Plex Mono';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url(fonts/ibm-plex-mono-600.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'IBM Plex Sans';
  font-style: normal;
  font-weight: 400;
  font-stretch: 100%;
  font-display: swap;
  src: url(fonts/ibm-plex-sans-400.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'IBM Plex Sans';
  font-style: normal;
  font-weight: 500;
  font-stretch: 100%;
  font-display: swap;
  src: url(fonts/ibm-plex-sans-500.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'IBM Plex Sans';
  font-style: normal;
  font-weight: 600;
  font-stretch: 100%;
  font-display: swap;
  src: url(fonts/ibm-plex-sans-600.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'IBM Plex Sans Condensed';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url(fonts/ibm-plex-sans-condensed-500.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'IBM Plex Sans Condensed';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url(fonts/ibm-plex-sans-condensed-600.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: 'IBM Plex Sans Condensed';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url(fonts/ibm-plex-sans-condensed-700.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

/* Layout: barra fissa con ricerca unica e due blocchi (Calcolo offline | Online: Domini, Internet);
   sotto, elenco strumenti a sinistra e pannello di lavoro a destra. Colore = dove gira il calcolo:
   verde-petrolio nel browser, ambra quando servono dati da internet. */
:root {
  --bg: #eef1f3; --surface: #ffffff; --sunk: #f6f8f9; --ink: #13202a; --muted: #5a6a76; --line: #d4dbe0;
  --calc: #0a6b70; --calc-soft: #dcefef; --net: #b5520c; --net-soft: #f8e7d8;
  --ok: #1f7a3a; --ok-soft: #dff1e4; --warn: #9a6a00; --warn-soft: #f6ecd0; --bad: #b42318; --bad-soft: #f9e0dd;
  --bit-net: #0a6b70; --bit-host: #b5520c;
  --f-display: "IBM Plex Sans Condensed", "Arial Narrow", system-ui, sans-serif;
  --f-body: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --f-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  --r: 6px;
}
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) {
  --bg: #0e151b; --surface: #151f27; --sunk: #111a21; --ink: #e2e9ee; --muted: #93a4b1; --line: #263540;
  --calc: #52bcc1; --calc-soft: #133034; --net: #f0974e; --net-soft: #3a2513;
  --ok: #5fcf83; --ok-soft: #12301d; --warn: #e3b74a; --warn-soft: #33290f; --bad: #ff8a7a; --bad-soft: #3a1612;
  --bit-net: #52bcc1; --bit-host: #f0974e; color-scheme: dark } }
:root[data-theme="dark"] {
  --bg: #0e151b; --surface: #151f27; --sunk: #111a21; --ink: #e2e9ee; --muted: #93a4b1; --line: #263540;
  --calc: #52bcc1; --calc-soft: #133034; --net: #f0974e; --net-soft: #3a2513;
  --ok: #5fcf83; --ok-soft: #12301d; --warn: #e3b74a; --warn-soft: #33290f; --bad: #ff8a7a; --bad-soft: #3a1612;
  --bit-net: #52bcc1; --bit-host: #f0974e; color-scheme: dark }

* { box-sizing: border-box }
body { background: var(--bg); color: var(--ink); font: 15px/1.5 var(--f-body) }
body::before { content: ""; position: fixed; inset: 0 0 auto; height: env(safe-area-inset-top, 0px); z-index: 10; background: var(--surface) }
a { color: inherit }
button, input, textarea, select { font: inherit; color: inherit }
:focus-visible { outline: 2px solid var(--calc); outline-offset: 2px }
.mono { font-family: var(--f-mono); font-variant-numeric: tabular-nums }

/* barra in alto */
.top { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 5; background: var(--surface); border-bottom: 1px solid var(--line) }
.top-in { max-width: 1240px; margin: 0 auto; padding-block: 10px; padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px));
  display: grid; grid-template-columns: auto 1fr auto; gap: 10px 20px; align-items: center }
.brand { font: 700 21px/1 var(--f-display); letter-spacing: .01em; display: flex; align-items: baseline; gap: 6px; white-space: nowrap }
.brand small { font: 500 11px var(--f-mono); color: var(--muted); letter-spacing: .04em }
.brand .slash { color: var(--calc) }
.omni { position: relative; min-width: 0 }
.omni input { width: 100%; padding: 9px 12px 9px 34px; border: 1px solid var(--line); border-radius: var(--r); background: var(--sunk); font-family: var(--f-mono); font-size: 14px }
.omni svg { position: absolute; left: 10px; top: 50%; transform: translateY(-50%); width: 16px; height: 16px; stroke: var(--muted); fill: none }
.omni .hint { position: absolute; right: 8px; top: 50%; transform: translateY(-50%); font: 500 11px var(--f-mono); color: var(--muted); pointer-events: none }
.areas { display: flex; gap: 14px; align-items: stretch }
.block { display: flex; gap: 2px; align-items: center }
.block-label { font: 600 10px var(--f-mono); letter-spacing: .1em; text-transform: uppercase; color: var(--muted); margin-right: 4px }
.area-btn { border: 0; background: transparent; padding: 7px 11px; border-radius: var(--r); cursor: pointer; font: 600 15px var(--f-display); letter-spacing: .02em; color: var(--muted) }
.area-btn:hover { color: var(--ink); background: var(--sunk) }
.area-btn[aria-current="true"][data-kind="calc"] { color: var(--calc); background: var(--calc-soft) }
.area-btn[aria-current="true"][data-kind="net"] { color: var(--net); background: var(--net-soft) }
.sep { width: 1px; background: var(--line) }

/* corpo */
.wrap { max-width: 1240px; margin: 0 auto; padding-block: 20px 48px; padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px));
  display: grid; grid-template-columns: 210px minmax(0, 1fr); gap: 24px }
.side { display: flex; flex-direction: column; gap: 2px; position: sticky; top: 76px; align-self: start }
.side h2 { font: 600 11px var(--f-mono); letter-spacing: .1em; text-transform: uppercase; color: var(--muted); margin: 0 0 8px 10px }
.side .where { font-size: 12.5px; color: var(--muted); margin: 14px 10px 0; line-height: 1.45 }
.tool-btn { text-align: left; border: 0; background: transparent; padding: 8px 10px; border-radius: var(--r); cursor: pointer; display: flex; justify-content: space-between; gap: 8px; color: var(--ink) }
.tool-btn small { color: var(--muted); font: 400 11.5px var(--f-mono) }
.tool-btn:hover { background: var(--surface) }
.tool-btn[aria-current="true"] { background: var(--surface); box-shadow: inset 3px 0 0 var(--kind, var(--calc)); font-weight: 600 }
main { min-width: 0; display: flex; flex-direction: column; gap: 18px }

.head { display: flex; flex-wrap: wrap; align-items: end; justify-content: space-between; gap: 8px 16px }
.head h1 { font: 700 30px/1.1 var(--f-display); margin: 0; text-wrap: balance }
.head p { margin: 4px 0 0; color: var(--muted); max-width: 64ch }
.chip { display: inline-flex; align-items: center; gap: 6px; font: 500 11.5px var(--f-mono); padding: 3px 8px; border-radius: 99px; border: 1px solid var(--line); background: var(--surface); color: var(--muted); white-space: nowrap }
.chip::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: currentColor }
.chip.calc { color: var(--calc); border-color: color-mix(in srgb, var(--calc) 35%, var(--line)) }
.chip.net { color: var(--net); border-color: color-mix(in srgb, var(--net) 35%, var(--line)) }
.chip.ok { color: var(--ok) } .chip.warn { color: var(--warn) } .chip.bad { color: var(--bad) }
.chip.plain::before { display: none }

.panel { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r) }
.panel-h { display: flex; justify-content: space-between; align-items: center; gap: 10px; padding: 12px 16px; border-bottom: 1px solid var(--line) }
.panel-h h3 { margin: 0; font: 600 16px var(--f-display); letter-spacing: .02em }
.panel-b { padding: 16px }
.form { display: flex; flex-wrap: wrap; gap: 10px; align-items: end }
.field { display: flex; flex-direction: column; gap: 4px; min-width: 0; flex: 1 1 220px }
.field.s { flex: 0 1 120px }
.field label { font: 600 11px var(--f-mono); letter-spacing: .08em; text-transform: uppercase; color: var(--muted) }
.field input, .field textarea, .field select { padding: 9px 11px; border: 1px solid var(--line); border-radius: var(--r); background: var(--sunk); font-family: var(--f-mono); font-size: 14px; width: 100% }
.field textarea { min-height: 112px; resize: vertical; line-height: 1.5 }
.err { color: var(--bad); background: var(--bad-soft); padding: 9px 12px; border-radius: var(--r); font-size: 14px }
.note { color: var(--muted); font-size: 13.5px }

/* righe etichetta/valore */
.kv { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 0 28px }
.kv > div { display: grid; grid-template-columns: 130px minmax(0, 1fr) auto; gap: 10px; align-items: baseline; padding: 8px 0; border-bottom: 1px dashed var(--line) }
.kv dt { color: var(--muted); font-size: 13px }
.kv dd { margin: 0; font-family: var(--f-mono); font-size: 14px; overflow-wrap: anywhere; font-variant-numeric: tabular-nums }
.copy { border: 0; background: transparent; cursor: pointer; color: var(--muted); padding: 0 2px; font: 500 11px var(--f-mono); opacity: .6 }
.copy:hover, .copy:focus-visible { opacity: 1; color: var(--ink) }

/* righello dei bit */
.bits { overflow-x: auto; padding-bottom: 4px }
.bitrow { display: flex; gap: 6px; font: 500 13px var(--f-mono); min-width: max-content }
.oct { display: flex; flex-direction: column; gap: 3px; align-items: center }
.oct .b { display: flex; gap: 1px }
.oct .b span { width: 14px; text-align: center; padding: 3px 0; border-radius: 2px }
.oct .b span.n { background: var(--calc-soft); color: var(--bit-net) }
.oct .b span.h { background: var(--net-soft); color: var(--bit-host) }
.oct .d { font-size: 11.5px; color: var(--muted) }
.legend { display: flex; gap: 14px; flex-wrap: wrap; font-size: 12.5px; color: var(--muted); margin-top: 8px }
.legend i { display: inline-block; width: 10px; height: 10px; border-radius: 2px; margin-right: 5px; vertical-align: -1px }

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--r); overflow: hidden }
.stat { background: var(--surface); padding: 12px 14px; min-width: 0 }
.stat b { display: block; font: 600 22px/1.2 var(--f-mono); font-variant-numeric: tabular-nums; overflow-wrap: anywhere }
.stat span { font-size: 12.5px; color: var(--muted) }

.tbl-wrap { overflow-x: auto }
table { width: 100%; border-collapse: collapse; font-size: 13.5px }
th { text-align: left; font: 600 11px var(--f-mono); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); padding: 8px 10px; border-bottom: 1px solid var(--line); white-space: nowrap }
td { padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top }
td.mono, td .mono { font-size: 13px }
tr:last-child td { border-bottom: 0 }
.num { text-align: right; font-variant-numeric: tabular-nums }
.list { display: flex; flex-wrap: wrap; gap: 6px; font-family: var(--f-mono); font-size: 13px }
.list span { padding: 3px 8px; background: var(--sunk); border: 1px solid var(--line); border-radius: 4px }
.grid2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 18px }
.links { display: flex; flex-wrap: wrap; gap: 8px }
.ext { display: inline-flex; gap: 6px; align-items: center; text-decoration: none; padding: 6px 10px; border: 1px solid var(--line); border-radius: var(--r); font-size: 13px; background: var(--sunk) }
.ext:hover { border-color: var(--net); color: var(--net) }
.ext::after { content: "↗"; font-size: 11px; color: var(--muted) }
.src { font: 500 11px var(--f-mono); color: var(--muted) }
.bar { height: 6px; background: var(--sunk); border-radius: 3px; overflow: hidden; min-width: 60px }
.bar i { display: block; height: 100%; background: var(--net) }
.sample { display: flex; gap: 10px; align-items: flex-start; padding: 10px 14px; border-radius: var(--r); background: var(--net-soft); color: var(--ink); font-size: 13.5px; border: 1px solid color-mix(in srgb, var(--net) 30%, transparent) }
.sample b { color: var(--net) }

.map { display: grid; grid-template-columns: minmax(120px, 170px) minmax(0, 1fr); gap: 0 14px; align-items: center }
.maprows { display: flex; flex-direction: column; gap: 10px; border-left: 2px solid var(--net); padding-left: 14px; min-width: 0 }
.maprow { display: grid; grid-template-columns: minmax(150px, 220px) 22px minmax(0, 1fr); align-items: center; min-width: 0 }
.node { display: flex; flex-direction: column; gap: 2px; padding: 8px 10px; border: 1px solid var(--line); border-radius: var(--r); background: var(--sunk); min-width: 0; overflow-wrap: anywhere }
.node small { color: var(--muted); font-size: 12px }
.node.as { border-color: var(--net); background: var(--net-soft); font-weight: 600 }
.edge { height: 2px; background: var(--line) }
.facs { display: flex; flex-wrap: wrap; gap: 5px; font-size: 12.5px; min-width: 0 }
.facs span { padding: 2px 7px; border: 1px solid var(--line); border-radius: 4px; color: var(--muted) }
.facs span.hit { border-color: var(--net); background: var(--net-soft); color: var(--ink); font-weight: 500 }
.facs a, .node a, td a, .list a { text-decoration-color: color-mix(in srgb, currentColor 35%, transparent); text-underline-offset: 2px }
@media (max-width: 700px) { .map { grid-template-columns: minmax(0, 1fr); gap: 10px } .maprow { grid-template-columns: minmax(0, 1fr); gap: 6px } .edge { display: none } }
.fonte { margin: 12px 0 0; padding-top: 8px; border-top: 1px dashed var(--line); font-size: 12px; color: var(--muted); line-height: 1.5 }
.fonte a, .fonte b { color: var(--net); font-weight: 600; text-decoration-color: color-mix(in srgb, currentColor 40%, transparent) }
.fonte.calc a, .fonte.calc b { color: var(--calc) }
.out { display: flex; flex-direction: column; gap: 18px }
.go { padding: 9px 16px; border: 1px solid var(--net); background: var(--net); color: var(--surface); border-radius: var(--r); cursor: pointer; font-weight: 600 }
.go:hover { filter: brightness(1.08) }
.retry { margin-left: 8px; border: 1px solid currentColor; background: transparent; color: inherit; border-radius: 4px; padding: 2px 8px; cursor: pointer }
.loading::before { content: ""; display: inline-block; width: 10px; height: 10px; margin-right: 8px; border: 2px solid var(--net); border-right-color: transparent; border-radius: 50%; vertical-align: -1px; animation: spin .8s linear infinite }
@keyframes spin { to { transform: rotate(360deg) } }
pre.raw { margin: 0; white-space: pre-wrap; overflow-wrap: anywhere; font: 12.5px/1.5 var(--f-mono); max-height: 520px; overflow: auto }

.chart { overflow-x: auto } .chart svg { width: 100%; min-width: 520px; height: auto; display: block }
.chart .grid { stroke: var(--line); stroke-width: 1 } .chart .ax { fill: var(--muted); font: 11px var(--f-mono) }
.chart .in-area { fill: var(--net-soft); stroke: none } .chart .in-line { fill: none; stroke: var(--net); stroke-width: 1.6 }
.chart .out-line { fill: none; stroke: var(--calc); stroke-width: 1.4 } .chart .end { fill: var(--net) }
.legend i.lg-in { background: var(--net) } .legend i.lg-out { background: var(--calc) }
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: var(--r); overflow: hidden }
.seg button { border: 0; background: transparent; padding: 4px 9px; font-size: 12px; cursor: pointer; color: var(--muted) }
.seg button + button { border-left: 1px solid var(--line) }
.seg button[aria-pressed="true"] { background: var(--net-soft); color: var(--net); font-weight: 600 }
td.path { line-height: 1.9 } .arrow { color: var(--muted) }
.brand-logo { width: 26px; height: 26px; flex: 0 0 auto; align-self: center }
.brand { align-items: center }
.legend i.lg-net { background: var(--calc-soft); outline: 1px solid var(--bit-net) }
.legend i.lg-host { background: var(--net-soft); outline: 1px solid var(--bit-host) }
.legend i.lg-hit { background: var(--net-soft); outline: 1px solid var(--net) }
.bad-text { color: var(--bad) }
.tool-btn.k-calc { --kind: var(--calc) } .tool-btn.k-net { --kind: var(--net) }
.map-geo { border-radius: var(--r); overflow: hidden; border: 1px solid var(--line) }
.map-geo svg { display: block; width: 100%; height: auto; aspect-ratio: 2 / 1 }
.m-sea { fill: var(--sunk) } .m-land { fill: var(--line); stroke: var(--surface); stroke-width: .6 }
.m-grat { fill: none; stroke: var(--line); stroke-width: .5; opacity: .7 }
.map-geo circle { stroke: var(--surface); stroke-width: .25; cursor: pointer }
.map-geo a:hover circle, .map-geo a:focus circle { stroke: var(--ink); stroke-width: .5 }
.m-mine { fill: var(--net) } .m-site { fill: var(--calc); opacity: .85 } .m-a { fill: var(--calc) } .m-b { fill: var(--net) } .m-both { fill: var(--ink) }
.m-n { fill: var(--surface); font-family: var(--f-mono); font-weight: 600; pointer-events: none }
.legend i.lg-dot { border-radius: 50% }
.legend i.lg-dot.m-mine, .legend i.lg-dot.m-b { background: var(--net) } .legend i.lg-dot.m-site, .legend i.lg-dot.m-a { background: var(--calc) } .legend i.lg-dot.m-both { background: var(--ink) }
h4.sub { margin: 16px 0 8px; font: 600 11px var(--f-mono); letter-spacing: .08em; text-transform: uppercase; color: var(--muted) }
@media (max-width: 900px) {
  .top-in { grid-template-columns: 1fr auto; }
  .omni { grid-column: 1 / -1; grid-row: 2 }
  .wrap { grid-template-columns: minmax(0, 1fr) }
  .side { position: static; flex-direction: row; overflow-x: auto; gap: 4px; padding-bottom: 4px }
  .side h2, .side .where { display: none }
  .tool-btn { white-space: nowrap; flex: 0 0 auto; border: 1px solid var(--line) }
  .tool-btn small { display: none }
  .tool-btn[aria-current="true"] { box-shadow: inset 0 -2px 0 var(--kind, var(--calc)) }
}
@media (max-width: 560px) {
  .areas { gap: 6px } .block-label { display: none } .area-btn { padding: 6px 8px; font-size: 14px }
  .head h1 { font-size: 25px }
  .kv > div { grid-template-columns: 110px minmax(0, 1fr) auto }
}
@media (prefers-reduced-motion: no-preference) { .panel { animation: in .18s ease-out both } @keyframes in { from { transform: translateY(3px) } } }