/* Speed Test Digital Combines — tema network: dark e light. */

/* ---- tokens ------------------------------------------------------ */

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #02070a;
  --bg-glow-1: rgba(23, 209, 193, 0.07);
  --bg-glow-2: rgba(143, 240, 79, 0.05);
  --dot: #12262d;
  --surface: rgba(13, 26, 32, 0.82);
  --surface-2: #0d1a20;
  --line: #17333d;
  --line-soft: #122730;
  --ink: #eaf6f4;
  --ink-2: #c2d9d6;
  --muted: #7fa3a0;
  --dl: #8ff04f;
  --dl-0: #17d1c1;
  --dl-1: #8ff04f;
  --ul: #c084fc;
  --ul-0: #a855f7;
  --ul-1: #c084fc;
  --bad: #ff7a70;
  --card-shadow: 0 12px 34px rgba(0, 0, 0, 0.42);
  --toggle-face: #0d1a20;
  --globe-dot: #14323c;
  --globe-glow: rgba(23, 209, 193, 0.13);
  --node: #8ff04f;
  --star: #2c5a66;
  --foot-ink: #ffffff;
  --btn-g0: #17d1c1; --btn-g1: #8ff04f; --btn-ink: #05230b;
  --brand-halo: rgba(2, 7, 10, 0.75);
}
:root {
  color-scheme: light;
  --bg: #f4f9fb;
  --bg-glow-1: rgba(45, 212, 191, 0.12);
  --bg-glow-2: rgba(132, 204, 22, 0.08);
  --dot: #d8e8ee;
  --surface: #ffffff;
  --surface-2: #eef6f8;
  --line: #d7e7ec;
  --line-soft: #e2eef2;
  --ink: #0e2430;
  --ink-2: #24424e;
  --muted: #476874;
  --dl: #0b8537;
  --dl-0: #14b8a6;
  --dl-1: #84cc16;
  --ul: #7c22ce;
  --ul-0: #8b5cf6;
  --ul-1: #d946ef;
  --bad: #dc2626;
  --card-shadow: 0 12px 30px rgba(14, 36, 48, 0.08);
  --toggle-face: #ffffff;
  --globe-dot: #b9d4de;
  --globe-glow: rgba(45, 212, 191, 0.16);
  --node: #14b8a6;
  --star: #9fc3cf;
  --foot-ink: #0e2430;
  --btn-g0: #0b7f75; --btn-g1: #4d7c0f; --btn-ink: #ffffff;
  --brand-halo: rgba(255, 255, 255, 0.9);
}

* { box-sizing: border-box; }

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden; clip: rect(0 0 0 0);
  white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--dl); color: var(--btn-ink);
  padding: 8px 14px; border-radius: 0 0 8px 0; z-index: 30;
}
.skip-link:focus { left: 0; }

body {
  margin: 0;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  background:
    radial-gradient(620px 340px at 10% -4%, var(--bg-glow-1), transparent 62%),
    radial-gradient(560px 340px at 92% 8%, var(--bg-glow-2), transparent 62%),
    var(--bg);
  color: var(--ink);
  font: 400 16px/1.5 "Schibsted Grotesk", system-ui, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  transition: background 0.3s ease, color 0.3s ease;
}

body > * { position: relative; z-index: 1; }

.wrap { width: min(1040px, 100% - 32px); margin-inline: auto; }

/* --- topbar -------------------------------------------------------- */

.topbar { padding: 18px 0; }
.topbar-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; }

.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; color: var(--ink); }
.brand-mark { display: block; border-radius: 8px; }
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-text strong {
  font-weight: 800; font-size: 22px; letter-spacing: 0.06em; text-transform: uppercase;
  background: linear-gradient(90deg, var(--btn-g0), var(--btn-g1));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
  filter: drop-shadow(0 1px 1px var(--brand-halo));
}
.brand-text small {
  color: var(--ul); font-size: 12px; font-weight: 800;
  letter-spacing: 0.22em; text-transform: uppercase;
  filter: drop-shadow(0 1px 1px var(--brand-halo));
}

.theme-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 42px; height: 42px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--toggle-face);
  color: var(--ink-2);
  cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}
.theme-toggle:hover { color: var(--dl); border-color: var(--dl); transform: rotate(12deg); }
.theme-toggle .ic { width: 20px; height: 20px; }
:root[data-theme="dark"] .ic-sun { display: none; }
:root:not([data-theme="dark"]) .ic-moon { display: none; }

.ic { display: block; }

.top-actions { display: flex; align-items: center; gap: 10px; }

.pdf-btn {
  display: none; align-items: center; gap: 8px; white-space: nowrap;
  height: 42px; padding: 0 16px; border-radius: 999px; cursor: pointer;
  border: 1.5px solid var(--dl); background: var(--surface);
  color: var(--dl); font: 800 12px/1 "Schibsted Grotesk", sans-serif;
  letter-spacing: 0.06em; text-transform: uppercase;
  transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
}
.pdf-btn:hover { background: var(--dl); color: var(--btn-ink); transform: translateY(-1px); }
.pdf-btn.is-visible { display: inline-flex; }
.pdf-btn .ic { width: 18px; height: 18px; }
body[data-phase="download"] .pdf-btn,
body[data-phase="upload"] .pdf-btn { opacity: 0.5; pointer-events: none; }

/* --- tab ------------------------------------------------------------ */

.tabs {
  display: flex; justify-content: center; gap: 4px;
  margin: 16px 0 0; padding: 6px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 999px;
  width: max-content; margin-inline: auto;
  box-shadow: var(--card-shadow), 0 0 0 1px color-mix(in srgb, var(--dl) 12%, transparent);
}

.tab {
  appearance: none; border: none; background: transparent;
  color: var(--muted);
  font: 800 14px/1 "Schibsted Grotesk", sans-serif;
  letter-spacing: 0.08em; text-transform: uppercase;
  padding: 13px 28px; border-radius: 999px;
  cursor: pointer; touch-action: manipulation;
  transition: color 0.15s ease, background 0.15s ease, box-shadow 0.15s ease;
}
.tab:hover { color: var(--dl); }
.tab.is-active {
  background: linear-gradient(120deg, var(--btn-g0), var(--btn-g1));
  color: var(--btn-ink); font-weight: 800; letter-spacing: 0.08em;
  box-shadow: 0 6px 22px color-mix(in srgb, var(--dl) 55%, transparent),
              inset 0 0 0 1px rgba(255, 255, 255, 0.35);
}

.view-sub {
  text-align: center;
  margin: 18px auto 0; max-width: 560px; color: var(--ink-2);
  font-size: 15px; font-weight: 500;
}
.view-sub strong { color: var(--dl); font-weight: 700; }
.tab:focus-visible, .theme-toggle:focus-visible, .start:focus-visible, .brand:focus-visible {
  outline: 2px solid var(--dl); outline-offset: 3px;
}

/* --- vista speed: griglia card + ring -------------------------------- */

.bench { padding: 22px 0 56px; }
.is-hidden { display: none !important; }

.speed-grid {
  display: grid;
  grid-template-columns: 1fr minmax(300px, 380px) 1fr;
  gap: 22px;
  align-items: center;
  margin-top: 26px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 20px 20px 16px;
  box-shadow: var(--card-shadow);
  backdrop-filter: blur(6px);
  transition: border-color 0.25s ease, transform 0.25s ease;
}
.card:hover { transform: translateY(-3px); }
body[data-phase="download"] .card-dl,
body[data-phase="upload"] .card-ul { border-color: var(--dl); }
body[data-phase="upload"] .card-ul { border-color: var(--ul); }

.card-head { display: flex; align-items: center; gap: 10px; margin: 0 0 6px; }
.card-head h2 {
  margin: 0; font: 800 14px/1 inherit;
  text-transform: uppercase; letter-spacing: 0.1em;
}
.card-dl .card-head h2 { color: var(--dl); }
.card-ul .card-head h2 { color: var(--ul); }
.card-ic { width: 22px; height: 22px; }
.ic-dl { color: var(--dl); }
.ic-ul { color: var(--ul); }

/* icona che "lavora" durante la misura */
@keyframes ic-bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(3px); }
}
@keyframes ic-bounce-up {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-3px); }
}
body[data-phase="download"] .ic-dl { animation: ic-bounce 0.9s ease-in-out infinite; }
body[data-phase="upload"] .ic-ul { animation: ic-bounce-up 0.9s ease-in-out infinite; }

.card-value { margin: 4px 0 10px; display: flex; align-items: baseline; gap: 8px; }
.card-value-num {
  font: 800 40px/1 "JetBrains Mono", monospace;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.03em;
}
.card-dl .card-value-num { color: var(--dl); }
.card-ul .card-value-num { color: var(--ul); }
.card-unit { font: 600 13px "JetBrains Mono", monospace; color: var(--muted); }

.spark { width: 100%; height: 56px; display: block; }
.spark-line { stroke-width: 2.5; stroke-linecap: round; vector-effect: non-scaling-stroke; }
.spark-dl-line { stroke: var(--dl); }
.spark-ul-line { stroke: var(--ul); }
.spark-fill { opacity: 0.28; }

.card-rows { margin: 14px 0 0; padding: 0; }
.card-rows > div {
  display: flex; justify-content: space-between; align-items: baseline;
  padding: 7px 0;
  border-top: 1px solid var(--line-soft);
}
.card-rows dt { font-size: 13px; color: var(--muted); }
.card-rows dd {
  margin: 0; font: 600 13px "JetBrains Mono", monospace;
  font-variant-numeric: tabular-nums; color: var(--ink);
}

/* --- quadro circolare ---------------------------------------------- */

.ring-wrap { display: flex; flex-direction: column; align-items: center; gap: 6px; }
.ring { width: 100%; max-width: 300px; display: block; }

.ring-ticks {
  fill: none; stroke: var(--line); stroke-width: 1;
  stroke-dasharray: 1 7; stroke-linecap: round;
}
.ring-track {
  fill: none; stroke: var(--surface-2); stroke-width: 12;
}
.ring-arc {
  fill: none; stroke: url(#gradDl); stroke-width: 12;
  stroke-linecap: round;
  transform: rotate(-90deg); transform-origin: 50% 50%;
  transition: stroke-dashoffset 0.35s ease;
}
body[data-phase="upload"] .ring-arc { stroke: url(#gradUl); }

.ring-center {
  position: absolute; inset: 0;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  text-align: center;
  pointer-events: none;
}
.ring-wrap { position: relative; }
.ring-ic { width: 30px; height: 30px; margin-bottom: 4px; color: var(--muted); }
.ring-value {
  margin: 0;
  font: 800 44px/1 "JetBrains Mono", monospace;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.03em; color: var(--ink);
}
.ring-unit { margin: 2px 0 0; font: 600 12px "JetBrains Mono", monospace; letter-spacing: 0.14em; color: var(--muted); }

/* fase corrente: punto che pulsa */
.phase-line {
  margin: 10px 0 0;
  display: flex; align-items: center; gap: 8px;
  font: 600 12px "JetBrains Mono", monospace;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--muted);
}
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--muted); flex: none; }
@keyframes dot-pulse {
  0%, 100% { opacity: 0.35; transform: scale(0.8); }
  50% { opacity: 1; transform: scale(1.15); }
}
body[data-phase="ping"] .dot { animation: dot-pulse 1s ease-in-out infinite; }
body[data-phase="download"] .dot { background: var(--dl); animation: dot-pulse 1s ease-in-out infinite; }
body[data-phase="upload"] .dot { background: var(--ul); animation: dot-pulse 1s ease-in-out infinite; }
body[data-phase="done"] .dot { background: var(--dl); }

/* SVG gradient stops */
.g-dl-0 { stop-color: var(--dl-0); }
.g-dl-1 { stop-color: var(--dl-1); }
.g-ul-0 { stop-color: var(--ul-0); }
.g-ul-1 { stop-color: var(--ul-1); }

/* --- azioni, progresso, note ---------------------------------------- */

.start {
  display: block; margin: 30px auto 0;
  appearance: none; border: none; cursor: pointer;
  padding: 16px 46px; border-radius: 999px;
  font: 800 16px/1 "Schibsted Grotesk", sans-serif;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: #ffffff;
  background: linear-gradient(120deg, #0b7f75, #4d7c0f);
  box-shadow: 0 8px 26px color-mix(in srgb, var(--dl) 35%, transparent);
  transition: transform 0.15s ease, box-shadow 0.15s ease, filter 0.15s ease;
}
.start:hover { transform: translateY(-2px); filter: brightness(1.08); }
.start:active { transform: translateY(0); }
.start[data-mode="stop"] {
  background: transparent; color: #ffffff;
  border: 1.5px solid var(--bad); box-shadow: none;
}

.progress {
  position: relative; overflow: hidden;
  height: 6px; max-width: 520px; margin: 20px auto 0;
  border-radius: 999px; background: var(--surface-2);
  border: 1px solid var(--line-soft);
}
.progress-bar {
  position: absolute; inset: 0;
  background: linear-gradient(90deg, var(--dl-0), var(--dl-1));
  transform: scaleX(0); transform-origin: left;
  transition: transform 0.25s ease;
}

.status-note {
  margin: 14px 0 0; min-height: 20px; text-align: center;
  font-size: 14px; color: var(--muted);
}
.status-note.tone-bad { color: var(--bad); font-weight: 600; }

.minis {
  display: flex; justify-content: center; gap: 12px;
  margin: 22px 0 0; padding: 0; flex-wrap: wrap;
}
.mini {
  display: flex; align-items: baseline; gap: 10px;
  padding: 14px 26px;
  background: color-mix(in srgb, var(--dl) 10%, var(--surface));
  border: 1.5px solid color-mix(in srgb, var(--dl) 45%, var(--line));
  border-radius: 999px; box-shadow: var(--card-shadow);
}
.mini:last-child {
  background: color-mix(in srgb, var(--ul) 10%, var(--surface));
  border-color: color-mix(in srgb, var(--ul) 45%, var(--line));
}
.mini dt {
  font: 800 12px/1 inherit; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--ink);
}
.mini dd {
  margin: 0; font: 800 22px/1 "JetBrains Mono", monospace;
  font-variant-numeric: tabular-nums; color: var(--dl);
}
.mini:last-child dd { color: var(--ul); }
.mini-unit { font: 800 12px "JetBrains Mono", monospace; color: var(--ink-2); }

/* --- transfer test --------------------------------------------------- */

.xfer-sub { text-align: center; margin: 18px auto 0; max-width: 620px; color: var(--ink-2); font-size: 15px; }

.xfer-live {
  display: flex; align-items: center; justify-content: center;
  gap: 22px; flex-wrap: wrap; margin-top: 22px;
}
.xfer-readout { display: flex; align-items: baseline; gap: 8px; }
.xfer-value {
  font: 800 40px/1 "JetBrains Mono", monospace;
  font-variant-numeric: tabular-nums; color: var(--ink);
}
.xfer-unit { font: 600 13px "JetBrains Mono", monospace; color: var(--muted); }

.results-card {
  margin: 30px 0 0;
  background: var(--surface);
  border: 1px solid var(--line); border-radius: 18px;
  padding: 22px; box-shadow: var(--card-shadow);
}
.results-head { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.results-ic { width: 24px; height: 24px; color: var(--dl); flex: none; }
.results-title { margin: 0; font: 800 16px/1.2 inherit; text-transform: uppercase; letter-spacing: 0.06em; }
.results-sub { margin: 3px 0 0; font-size: 13px; color: var(--muted); }

.xfer-table-wrap { overflow-x: auto; }
.xfer-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.xfer-table th, .xfer-table td { padding: 10px 12px; }
.xfer-table thead th {
  font: 600 12px/1.3 inherit; text-transform: uppercase;
  letter-spacing: 0.08em; color: var(--muted);
  border-bottom: 1px solid var(--line);
  text-align: center;
}
.xfer-table thead th small { font-size: 10px; letter-spacing: 0.05em; }
.xfer-table thead th.col-block { text-align: left; }
.xfer-table tbody th {
  text-align: left;
  font: 600 14px "JetBrains Mono", monospace;
  color: var(--ink); white-space: nowrap;
}
.xfer-table tbody td.num {
  text-align: center;
  font: 600 14px "JetBrains Mono", monospace;
  font-variant-numeric: tabular-nums; color: var(--ink);
}
.xfer-table .dl { color: var(--dl); }
.xfer-table .ul { color: var(--ul); }
.xfer-table td.is-measuring { opacity: 0.55; }
.xfer-table tbody tr { border-bottom: 1px solid var(--line-soft); }
.xfer-table tbody tr:last-child { border-bottom: none; }

/* barre: lunghezza relativa al massimo visto nella colonna */
.xfer-table td.bar { width: 22%; min-width: 90px; }
.xfer-table .last { font-weight: 800; }
.xfer-table .avg {
  font-weight: 600; font-size: 0.85em; color: var(--muted);
  margin-left: 4px;
}
.xfer-summary-cards {
  display: none;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin: 18px 0 22px;
}
.xfer-summary-cards.is-visible { display: grid; }
.xfer-summary-label {
  margin: 8px 0 0;
  font-size: 13px; font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.bar-track {
  display: block; height: 8px; border-radius: 999px;
  background: var(--surface-2); overflow: hidden;
}
.bar-fill {
  display: block; height: 100%; width: 100%;
  border-radius: 999px;
  transform: scaleX(0.02); transform-origin: left;
  transition: transform 0.4s ease;
}
.bar-dl { background: linear-gradient(90deg, var(--dl-0), var(--dl-1)); }
.bar-ul { background: linear-gradient(90deg, var(--ul-0), var(--ul-1)); }

.privacy {
  margin: 30px 0 0; padding: 16px 22px;
  border: 1.5px solid color-mix(in srgb, var(--dl) 30%, var(--line-soft));
  border-radius: 14px;
  background: color-mix(in srgb, var(--dl) 6%, var(--surface-2));
  font-size: 14px; color: var(--ink-2);
  text-align: center;
}
.privacy strong {
  display: inline;
  color: var(--btn-g0);
  font-weight: 800;
  letter-spacing: 0.04em;
}
:root[data-theme="dark"] .privacy {
  border-color: color-mix(in srgb, var(--dl) 35%, var(--line-soft));
  background: color-mix(in srgb, var(--dl) 8%, var(--surface-2));
}
:root[data-theme="dark"] .privacy strong { color: var(--dl); }

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

.foot { margin-top: 30px; border-top: 1px solid var(--line); padding: 26px 0 34px; }
.foot-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 18px; flex-wrap: wrap;
}
.foot-brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; }
.foot-name {
  font: 800 14px/1 "Schibsted Grotesk", sans-serif;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--foot-ink);
}
.foot-links {
  display: flex; align-items: center;
  gap: 26px; flex-wrap: wrap;
}
.foot-links a,
.foot-links a.privacy-link,
.privacy-link {
  color: var(--foot-ink); text-decoration: none;
  font: 800 12px/1 "Schibsted Grotesk", sans-serif;
  letter-spacing: 0.08em; text-transform: uppercase;
  transition: color 0.15s ease;
}
.foot-links a:hover,
.foot-links a.privacy-link:hover,
.privacy-link:hover { color: var(--dl); }

/* --- modale Privacy Policy ------------------------------------------- */

.modal {
  position: fixed; inset: 0; z-index: 50;
  display: none; align-items: center; justify-content: center;
  padding: 20px;
}
.modal.is-open { display: flex; }
.modal-backdrop {
  position: absolute; inset: 0;
  background: rgba(0, 0, 0, 0.72);
  backdrop-filter: blur(3px);
}
.modal-panel {
  position: relative;
  width: min(720px, 100%);
  max-height: calc(100dvh - 40px);
  display: flex; flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--card-shadow), 0 20px 60px rgba(0, 0, 0, 0.35);
  animation: rise-in 0.3s ease;
}
.modal-head {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 18px 22px 14px;
  border-bottom: 1px solid var(--line-soft);
}
.modal-head h2 {
  margin: 0; font: 800 18px/1 inherit;
  text-transform: uppercase; letter-spacing: 0.06em;
  color: var(--ink);
}
.modal-close {
  display: inline-flex; align-items: center; justify-content: center;
  width: 36px; height: 36px; border-radius: 10px;
  border: 1px solid var(--line); background: var(--surface-2);
  color: var(--ink-2); font-size: 22px; line-height: 1;
  cursor: pointer; transition: color 0.2s ease, border-color 0.2s ease;
}
.modal-close:hover { color: var(--dl); border-color: var(--dl); }
.modal-body {
  padding: 18px 22px 22px;
  overflow-y: auto;
  font-size: 14px; line-height: 1.55; color: var(--ink-2);
}
.modal-body h3 {
  margin: 18px 0 8px; font: 800 13px/1.3 inherit;
  text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--ink);
}
.modal-body h3:first-child { margin-top: 0; }
.modal-body p { margin: 0 0 10px; }
.modal-body a { color: var(--dl); text-decoration: underline; }
.modal-body a:hover { color: var(--ink); }
.privacy-updated {
  font-size: 12px; color: var(--muted); margin-bottom: 14px;
}

@media (max-width: 640px) {
  .modal { padding: 12px; }
  .modal-panel { max-height: calc(100dvh - 24px); border-radius: 14px; }
  .modal-head { padding: 14px 16px 10px; }
  .modal-head h2 { font-size: 15px; }
  .modal-body { padding: 12px 16px 16px; font-size: 13px; }
  .modal-body h3 { font-size: 12px; margin-top: 14px; }
  .privacy { font-size: 13px; padding: 12px 14px; }
}

/* --- responsive -------------------------------------------------------- */
/* Tablet: 768px - 1024px (più "mobile" del desktop ma a 2 colonne) */
@media (max-width: 1024px) {
  .wrap { width: min(960px, 100% - 24px); }
  .topbar { padding: 14px 0; }
  .brand-text strong { font-size: 20px; }
  .brand-text small { font-size: 11px; }

  .bench { padding: 16px 0 32px; }
  .view-sub, .xfer-sub { max-width: 540px; font-size: 15px; }
  .tabs { margin-top: 14px; }
  .tab { padding: 13px 20px; font-size: 13px; }

  .speed-grid {
    grid-template-columns: 1fr 1fr;
    gap: 14px;
    align-items: stretch;
    margin-top: 18px;
  }
  .ring-wrap { grid-column: 1 / -1; order: -1; }
  .ring { max-width: 260px; }
  .ring-value { font-size: 48px; }

  .card { padding: 18px 16px 14px; border-radius: 16px; }
  .card-head h2 { font-size: 14px; }
  .card-value-num { font-size: 42px; }
  .card-unit { font-size: 13px; }
  .card-ic { width: 22px; height: 22px; }
  .spark { height: 50px; }
  .card-rows { margin-top: 10px; }
  .card-rows dt, .card-rows dd { font-size: 13px; }

  .start { padding: 16px 44px; font-size: 16px; margin-top: 22px; }
  .progress { max-width: 480px; margin-top: 16px; }
  .minis { gap: 10px; margin-top: 16px; }
  .mini { padding: 13px 22px; }
  .mini dd { font-size: 22px; }

  .xfer-live { margin-top: 16px; gap: 16px; }
  .xfer-value { font-size: 42px; }
  .xfer-summary-cards { grid-template-columns: repeat(2, 1fr); gap: 12px; margin: 14px 0 18px; }
  .xfer-summary-label { font-size: 12px; }
  .results-card { margin-top: 20px; padding: 16px; }
  .results-title { font-size: 15px; }
  .xfer-table { font-size: 13px; }
  .xfer-table th, .xfer-table td { padding: 8px 10px; }
  .xfer-table td.bar { width: 18%; min-width: 70px; }
  .xfer-table .bar-track { height: 6px; }

  .privacy { margin-top: 18px; padding: 14px 16px; font-size: 14px; }
  .foot { margin-top: 18px; padding: 20px 0 28px; }
  .foot-name { font-size: 13px; }
  .foot-links a,
  .foot-links a.privacy-link,
  .privacy-link { font-size: 11px; }
}

/* Mobile: < 768px — layout app-like, caratteri e touch target grandi */
@media (max-width: 767px) {
  html { -webkit-text-size-adjust: 100%; }
  body { font-size: 18px; }

  /* tutto a tutta larghezza con margine ridotto */
  .wrap { width: calc(100% - 12px); }

  /* sfondo pulito su telefono, niente decorazioni che stringono */
  .bg-orbits, .bg-globe, .bg-stars { display: none !important; }
  body {
    background:
      radial-gradient(360px 260px at 12% -2%, var(--bg-glow-1), transparent 62%),
      radial-gradient(320px 260px at 94% 6%, var(--bg-glow-2), transparent 62%),
      var(--bg);
  }

  /* topbar compatta */
  .topbar { padding: 8px 0; }
  .topbar-inner { flex-wrap: nowrap; gap: 8px; }
  .brand-text strong { font-size: 17px; }
  .brand-text small { font-size: 9px; letter-spacing: 0.16em; }
  .brand-mark { width: 34px; height: auto; }
  .pdf-btn { height: 38px; padding: 0 10px; font-size: 10px; }
  .theme-toggle { width: 38px; height: 38px; }
  .top-actions { margin-left: auto; gap: 8px; }

  /* tab giganti a tutta larghezza */
  .bench { padding: 8px 0 18px; }
  .view-sub, .xfer-sub { margin-top: 8px; font-size: 14px; padding: 0 2px; line-height: 1.4; }
  .tabs { width: 100%; justify-content: stretch; margin-top: 10px; padding: 5px; }
  .tab { flex: 1; padding: 16px 2px; font-size: 15px; text-align: center; }

  /* speed test: colonna unica, spazi stretti, numeri enormi */
  .speed-grid { grid-template-columns: 1fr; gap: 8px; margin-top: 10px; align-items: stretch; }
  .ring-wrap { order: -1; gap: 4px; }
  .ring { max-width: 300px; }
  .ring-value { font-size: 64px; }
  .ring-unit { font-size: 15px; letter-spacing: 0.12em; }
  .ring-ic { width: 34px; height: 34px; }

  .card { padding: 16px 12px 12px; border-radius: 16px; }
  .card-head h2 { font-size: 16px; }
  .card-value-num { font-size: 54px; }
  .card-unit { font-size: 15px; }
  .card-ic { width: 24px; height: 24px; }
  .spark { height: 46px; }
  .card-rows { margin-top: 8px; }
  .card-rows > div { padding: 6px 0; }
  .card-rows dt { font-size: 14px; }
  .card-rows dd { font-size: 14px; }
  .phase-line { font-size: 12px; margin-top: 6px; }

  /* pulsante AVVIA enorme */
  .start { width: 100%; padding: 20px 18px; font-size: 18px; margin-top: 12px; }
  .progress { margin-top: 10px; max-width: 100%; }
  .status-note { font-size: 13px; margin-top: 8px; min-height: 0; }

  .minis { margin-top: 10px; gap: 8px; flex-direction: column; align-items: stretch; }
  .mini { padding: 14px 14px; gap: 8px; justify-content: center; }
  .mini dt { font-size: 13px; }
  .mini dd { font-size: 24px; }
  .mini-unit { font-size: 13px; }

  /* transfer test */
  .xfer-live { margin-top: 12px; gap: 10px; }
  .xfer-value { font-size: 52px; }
  .xfer-summary-cards { grid-template-columns: 1fr; gap: 8px; margin: 10px 0 12px; }
  .xfer-summary-label { font-size: 12px; }
  .results-card { padding: 14px; margin-top: 0; }
  .results-head { margin-bottom: 8px; }
  .results-title { font-size: 15px; }
  .results-sub { font-size: 12px; }
  .xfer-table { font-size: 15px; }
  .xfer-table th, .xfer-table td { padding: 9px 4px; }
  .xfer-table thead th small { font-size: 10px; }
  .xfer-table td.bar { display: none; }
  .xfer-table th.col-bar { display: none; }
  .xfer-table .last { display: block; }
  .xfer-table .avg { display: block; margin-left: 0; }

  .privacy { margin-top: 10px; padding: 12px; font-size: 13px; line-height: 1.4; }

  /* footer compatto */
  .foot { margin-top: 10px; padding: 16px 0 20px; }
  .foot-inner { flex-direction: column; align-items: center; gap: 10px; text-align: center; }
  .foot-name { font-size: 11px; }
  .foot-links { gap: 12px; justify-content: center; flex-wrap: wrap; }
  .foot-links a,
  .foot-links a.privacy-link,
  .privacy-link { font-size: 10px; }
}

/* Piccoli telefoni */
@media (max-width: 360px) {
  body { font-size: 17px; }
  .brand-text strong { font-size: 15px; }
  .tab { font-size: 14px; padding: 14px 2px; }
  .card-value-num { font-size: 48px; }
  .ring { max-width: 270px; }
  .ring-value { font-size: 56px; }
  .start { font-size: 17px; padding: 18px 16px; }
  .xfer-table { font-size: 14px; }
  .xfer-table th, .xfer-table td { padding: 8px 3px; }
}

@media print {
  body { display: none !important; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* --- sfondo scena: globo, orbite, nodi, stelle ----------------------- */

.bg-scene {
  position: fixed; inset: 0;
  width: 100%; height: 100%;
  z-index: 0; pointer-events: none; overflow: hidden;
}
.bg-scene::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(900px 640px at 14% 96%, var(--globe-glow), transparent 64%);
}

/* globo di punti: campo di puntini che ruota su TUTTO lo sfondo */
.bg-globe {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  background-image:
    radial-gradient(circle, var(--globe-dot) 1.7px, transparent 1.9px),
    radial-gradient(circle, var(--globe-dot) 1.1px, transparent 1.3px);
  background-size: 15px 15px, 7.5px 7.5px;
  background-position: 0 0, 3px 4px;
  -webkit-mask: radial-gradient(140% 120% at 20% 100%, #000 0 72%, transparent 99%);
  mask: radial-gradient(140% 120% at 20% 100%, #000 0 72%, transparent 99%);
  animation: globe-spin 140s linear infinite;
  opacity: 0.85;
}
@keyframes globe-spin {
  from { background-position: 0 0, 3px 4px; }
  to { background-position: 990px 0, 993px 4px; }
}

/* archi orbitali con tratteggio in movimento */
.bg-orbits { position: absolute; inset: 0; width: 100%; height: 100%; }
.orbit {
  fill: none; stroke: url(#orbGrad); stroke-width: 1.6;
  stroke-dasharray: 7 12; opacity: 0.55;
  animation: orbit-drift 30s linear infinite;
}
.orbit.o2 { animation-duration: 44s; animation-direction: reverse; opacity: 0.35; }
.orbit.o3 { animation-duration: 36s; opacity: 0.4; }
@keyframes orbit-drift { to { stroke-dashoffset: -380; } }

/* nodi luminosi della rete */
.node {
  fill: var(--node);
  filter: drop-shadow(0 0 7px var(--node));
  transform-box: fill-box; transform-origin: center;
  animation: node-pulse 3.4s ease-in-out infinite;
}
.node.n2 { animation-delay: 0.7s; }
.node.n3 { animation-delay: 1.3s; }
.node.n4 { animation-delay: 2.1s; animation-duration: 4.2s; }
.node.n5 { animation-delay: 2.8s; }
@keyframes node-pulse {
  0%, 100% { opacity: 0.3; transform: scale(0.75); }
  50% { opacity: 1; transform: scale(1.3); }
}

/* stelle: due livelli di puntini che brillano (piu forti nel dark) */
.bg-stars {
  position: absolute; inset: 0;
  background-image:
    radial-gradient(circle, var(--star) 1.1px, transparent 1.5px),
    radial-gradient(circle, var(--star) 0.8px, transparent 1.2px);
  background-size: 230px 190px, 350px 310px;
  background-position: 60px 40px, 170px 130px;
  animation: twinkle 7s ease-in-out infinite alternate;
}
@keyframes twinkle { from { opacity: 0.55; } to { opacity: 1; } }

/* bagliore del quadro durante la misura */
.ring-wrap::before {
  content: ""; position: absolute; top: 50%; left: 50%;
  width: 250px; height: 250px; border-radius: 50%;
  translate: -50% -50%;
  background: radial-gradient(circle, color-mix(in srgb, var(--dl) 26%, transparent), transparent 70%);
  filter: blur(16px); opacity: 0; z-index: 0;
  transition: opacity 0.4s ease;
  pointer-events: none;
}
body[data-phase="download"] .ring-wrap::before,
body[data-phase="upload"] .ring-wrap::before {
  opacity: 1;
  animation: glow-pulse 2.2s ease-in-out infinite;
}
body[data-phase="upload"] .ring-wrap::before {
  background: radial-gradient(circle, color-mix(in srgb, var(--ul) 26%, transparent), transparent 70%);
}
@keyframes glow-pulse {
  0%, 100% { transform: scale(1); opacity: 0.65; }
  50% { transform: scale(1.12); opacity: 1; }
}
.ring, .ring-center, .phase-line { z-index: 1; }

/* ingresso card */
@keyframes rise-in {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: translateY(0); }
}
.card, .ring-wrap, .results-card, .view-sub, .xfer-sub {
  animation: rise-in 0.55s ease backwards;
}
.speed-grid .card-dl { animation-delay: 0.08s; }
.speed-grid .ring-wrap { animation-delay: 0s; }
.speed-grid .card-ul { animation-delay: 0.16s; }
.results-card { animation-delay: 0.1s; }