/* Guida Kegel — foglio di stile unico
   Struttura: nastro pubblicitario, testata con indice laterale sticky,
   corpo editoriale a colonna singola con fasce a tutta larghezza. */

*, *::before, *::after { box-sizing: border-box; }

:root {
  --ink: #17161c;
  --ink-2: #3a3742;
  --muted: #726d7c;
  --line: #ddd5c9;
  --line-soft: #ebe4d9;
  --paper: #f6f2ea;
  --card: #fffdf9;
  --plum: #6e1b48;
  --plum-2: #a62e72;
  --plum-wash: #f3e6ee;
  --steel: #1f4e4a;
  --steel-wash: #e4eeec;
  --amber: #9a5b12;
  --amber-wash: #f7ecdb;
  --sans: "Bricolage Grotesque", "Helvetica Neue", Arial, sans-serif;
  --serif: "Source Serif 4", Georgia, "Times New Roman", serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --col: 700px;
  --shell: 1240px;
  --rail: 236px;
}

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.66;
  font-variant-numeric: oldstyle-nums;
  -webkit-font-smoothing: antialiased;
}

img, svg { max-width: 100%; }
img { display: block; height: auto; }
a { color: var(--plum); text-decoration-thickness: 1px; text-underline-offset: 2px; }
p { margin: 0 0 1.1em; }
h1, h2, h3, h4 {
  margin: 0;
  font-family: var(--sans);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.02em;
  font-variant-numeric: lining-nums;
}
[id] { scroll-margin-top: 96px; }

.col { width: 100%; max-width: var(--col); margin: 0 auto; padding: 0 22px; }
.shell { width: 100%; max-width: var(--shell); margin: 0 auto; padding: 0 22px; }
.wide { max-width: 960px; }

.kicker {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 12px;
}
.kicker--plum { color: var(--plum-2); }
.lede { font-size: 20.5px; line-height: 1.58; color: var(--ink-2); }
.fine { font-size: 13.5px; line-height: 1.55; color: var(--muted); font-family: var(--sans); font-weight: 400; }
.fine a { color: var(--plum); }
.hr { height: 1px; background: var(--line); border: 0; margin: 0; }

/* ---------- nastro obbligatorio ---------- */
.ribbon {
  background: var(--ink);
  color: #fff;
  padding: 9px 22px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  text-align: center;
  background-image: repeating-linear-gradient(135deg, rgba(255, 255, 255, 0.07) 0 6px, transparent 6px 14px);
}
.ribbon a { color: #fff; }

/* ---------- barra di lettura ---------- */
.progress {
  position: fixed;
  inset: 0 auto auto 0;
  height: 3px;
  width: 0;
  background: var(--plum-2);
  z-index: 80;
  transition: width 0.1s linear;
}

/* ---------- testata ---------- */
.masthead {
  position: sticky;
  top: 0;
  z-index: 60;
  background: color-mix(in srgb, var(--paper) 93%, transparent);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(8px) saturate(1.3);
}
.masthead .shell {
  display: flex;
  align-items: center;
  gap: 18px;
  height: 68px;
}
.logo { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); }
.logo svg { width: 30px; height: 30px; flex: none; }
.logo b {
  font-family: var(--sans);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.02em;
  display: block;
  line-height: 1.05;
}
.logo i {
  font-family: var(--mono);
  font-style: normal;
  font-size: 9.5px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
  display: block;
}
.mast-nav { margin-left: auto; display: flex; align-items: center; gap: 20px; }
.mast-nav a:not(.btn) {
  font-family: var(--sans);
  font-size: 13.5px;
  color: var(--ink-2);
  text-decoration: none;
}
.mast-nav a:not(.btn):hover { color: var(--plum-2); }
.mast-tag {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  border: 1px solid var(--line);
  padding: 5px 9px;
}

/* ---------- pulsanti ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--sans);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  padding: 13px 20px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: #fff;
  border-radius: 2px;
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}
.btn:hover { transform: translate(-2px, -2px); box-shadow: 4px 4px 0 var(--plum-2); }
.btn--plum { background: var(--plum); border-color: var(--plum); }
.btn--plum:hover { box-shadow: 4px 4px 0 var(--ink); }
.btn--line { background: transparent; color: var(--ink); }
.btn--line:hover { box-shadow: 4px 4px 0 var(--line); }
.btn--sm { padding: 9px 14px; font-size: 13.5px; }
.btn svg { width: 14px; height: 14px; }

/* ---------- apertura ---------- */
.opener { padding: 46px 0 10px; }
.opener h1 {
  font-size: clamp(32px, 5.2vw, 52px);
  max-width: 22ch;
}
.opener .lede { margin: 20px 0 0; }
.byline {
  margin-top: 22px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 6px 20px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}

/* ---------- figura prodotto in apertura ---------- */
.showcase { padding: 30px 0 0; }
.showcase-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 26px;
  align-items: end;
}
.frame {
  position: relative;
  background: var(--card);
  border: 1px solid var(--line);
  padding: 14px;
}
.frame::after {
  content: "";
  position: absolute;
  inset: 12px -12px -12px 12px;
  background: var(--plum-wash);
  z-index: -1;
}
.frame img { width: 100%; }
.frame figcaption {
  margin-top: 12px;
  font-family: var(--sans);
  font-size: 12.5px;
  color: var(--muted);
  line-height: 1.5;
}
.spec-card {
  border: 1px solid var(--ink);
  background: var(--card);
  padding: 20px 20px 8px;
}
.spec-card h2 {
  font-size: 15px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-family: var(--mono);
  font-weight: 400;
  color: var(--muted);
  margin-bottom: 14px;
}
.leaders { margin: 0; }
.leaders div {
  display: flex;
  align-items: baseline;
  gap: 6px;
  padding: 7px 0;
  border-bottom: 1px dotted var(--line);
  font-size: 15.5px;
}
.leaders div:last-child { border-bottom: 0; }
.leaders dt { font-family: var(--sans); font-size: 13.5px; color: var(--muted); white-space: nowrap; }
.leaders dd { margin: 0 0 0 auto; font-family: var(--mono); font-size: 13.5px; text-align: right; }

/* ---------- fascia numeri ---------- */
.numbers {
  margin: 44px 0 0;
  border-top: 2px solid var(--ink);
  border-bottom: 1px solid var(--line);
  background: var(--card);
}
.numbers-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}
.numbers-grid > div {
  padding: 22px 20px;
  border-left: 1px solid var(--line-soft);
}
.numbers-grid > div:first-child { border-left: 0; }
.numbers b {
  display: block;
  font-family: var(--sans);
  font-size: clamp(26px, 3.6vw, 36px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
  font-variant-numeric: lining-nums;
}
.numbers em {
  display: block;
  font-style: normal;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--plum-2);
  margin: 10px 0 6px;
}
.numbers span { font-size: 14.5px; color: var(--ink-2); line-height: 1.5; display: block; }

/* ---------- corpo con indice laterale ---------- */
.body-shell {
  display: grid;
  grid-template-columns: var(--rail) minmax(0, 1fr);
  gap: 40px;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 22px;
  align-items: start;
}
.rail { position: sticky; top: 92px; padding: 40px 0 0; }
.rail p {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}
.rail ol { list-style: none; margin: 0; padding: 0; counter-reset: r; }
.rail li { counter-increment: r; }
.rail a {
  display: grid;
  grid-template-columns: 26px 1fr;
  gap: 4px;
  padding: 6px 0;
  font-family: var(--sans);
  font-size: 13px;
  line-height: 1.35;
  color: var(--muted);
  text-decoration: none;
  border-left: 2px solid transparent;
  padding-left: 10px;
}
.rail a::before {
  content: counter(r, decimal-leading-zero);
  font-family: var(--mono);
  font-size: 10px;
  color: var(--line);
  padding-top: 2px;
}
.rail a:hover { color: var(--ink); }
.rail a.is-current { color: var(--plum); border-left-color: var(--plum-2); font-weight: 600; }
.rail a.is-current::before { color: var(--plum-2); }

/* la colonna di lettura resta a 700px, mentre i blocchi .full
   occupano tutta la larghezza disponibile accanto all'indice */
.article { min-width: 0; padding: 10px 0 0; }
.article > *:not(.chapter),
.chapter > *:not(.full) { max-width: var(--col); }

/* ---------- capitoli ---------- */
.chapter { padding: 44px 0 6px; }
.chapter > h2 {
  font-size: clamp(25px, 3.4vw, 34px);
  margin: 0 0 16px;
  padding-top: 16px;
  border-top: 2px solid var(--ink);
  position: relative;
}
.chapter > h2 span {
  display: block;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.2em;
  color: var(--plum-2);
  margin-bottom: 10px;
  text-transform: uppercase;
}
.chapter h3 {
  font-size: 19.5px;
  margin: 30px 0 8px;
}
.chapter h4 {
  font-size: 16px;
  margin: 22px 0 6px;
  font-family: var(--sans);
}

/* ---------- riquadri ---------- */
.callout {
  border-left: 3px solid var(--plum-2);
  background: var(--plum-wash);
  padding: 18px 20px 6px;
  margin: 22px 0;
}
.callout > b {
  display: block;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--plum);
  margin-bottom: 8px;
}
.callout p { font-size: 16.5px; }
.callout--steel { border-left-color: var(--steel); background: var(--steel-wash); }
.callout--steel > b { color: var(--steel); }
.callout--amber { border-left-color: var(--amber); background: var(--amber-wash); }
.callout--amber > b { color: var(--amber); }

.note {
  font-family: var(--sans);
  font-size: 13.5px;
  line-height: 1.55;
  color: var(--muted);
  border-top: 1px solid var(--line);
  padding-top: 10px;
  margin: 18px 0 22px;
}

/* ---------- elenchi ---------- */
.ticks { list-style: none; margin: 16px 0 22px; padding: 0; }
.ticks li {
  position: relative;
  padding: 5px 0 5px 26px;
  border-bottom: 1px solid var(--line-soft);
  font-size: 16.5px;
}
.ticks li:last-child { border-bottom: 0; }
.ticks li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 15px;
  width: 9px;
  height: 9px;
  border: 1px solid var(--plum-2);
  transform: rotate(45deg);
}
.ticks--steel li::before { border-color: var(--steel); }

/* ---------- protocollo a tappe ---------- */
.stages { margin: 24px 0 10px; counter-reset: s; }
.stage {
  counter-increment: s;
  position: relative;
  padding: 0 0 24px 52px;
  border-left: 1px solid var(--line);
  margin-left: 15px;
}
.stage:last-child { border-left-color: transparent; padding-bottom: 0; }
.stage::before {
  content: counter(s);
  position: absolute;
  left: -16px;
  top: 0;
  width: 31px;
  height: 31px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--plum);
  color: #fff;
  font-family: var(--mono);
  font-size: 13px;
}
.stage b {
  font-family: var(--sans);
  font-size: 17px;
  display: block;
  padding-top: 3px;
}
.stage em {
  font-style: normal;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  display: inline-block;
  border: 1px solid var(--line);
  padding: 2px 7px;
  margin: 8px 0;
}
.stage p { font-size: 16.5px; margin-bottom: 0; }

/* ---------- semaforo ---------- */
.triage { display: grid; gap: 14px; grid-template-columns: repeat(3, 1fr); margin: 24px 0; }
.triage > div {
  background: var(--card);
  border: 1px solid var(--line);
  border-top: 5px solid var(--steel);
  padding: 16px 16px 6px;
}
.triage > div:nth-child(2) { border-top-color: var(--amber); }
.triage > div:nth-child(3) { border-top-color: var(--plum); }
.triage b {
  display: block;
  font-family: var(--sans);
  font-size: 15px;
  margin-bottom: 8px;
}
.triage ul { list-style: none; margin: 0; padding: 0; }
.triage li {
  font-size: 14.5px;
  line-height: 1.5;
  padding: 5px 0 5px 14px;
  position: relative;
  color: var(--ink-2);
}
.triage li::before {
  content: "—";
  position: absolute;
  left: 0;
  color: var(--line);
}

/* ---------- tabelle ---------- */
.table-scroll { overflow-x: auto; margin: 22px 0 8px; border: 1px solid var(--line); background: var(--card); }
table { width: 100%; border-collapse: collapse; font-size: 15px; }
thead th {
  text-align: left;
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 400;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  background: var(--ink);
  color: #fff;
  padding: 11px 14px;
  white-space: nowrap;
}
tbody th {
  text-align: left;
  font-family: var(--sans);
  font-size: 14.5px;
  font-weight: 600;
  padding: 12px 14px;
  vertical-align: top;
  width: 24%;
}
tbody td { padding: 12px 14px; vertical-align: top; color: var(--ink-2); line-height: 1.5; }
tbody tr + tr { border-top: 1px solid var(--line-soft); }
tbody tr:nth-child(odd) { background: color-mix(in srgb, var(--paper) 55%, transparent); }

/* ---------- pannelli larghi ---------- */
.band { background: var(--ink); color: #f3efe8; padding: 34px 32px 26px; margin: 44px 0; }
.band h2 { color: #fff; font-size: clamp(25px, 3.4vw, 34px); margin-bottom: 14px; }
.band .kicker { color: #c6a8ba; }
.band p { color: #d8d2c9; }
.band .split { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; align-items: start; }
.band .leaders div { border-bottom-color: rgba(255, 255, 255, 0.16); }
.band .leaders dt { color: #b4aeb9; }
.band .leaders dd { color: #fff; }

.band--paper { background: var(--card); color: var(--ink); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.band--paper h2 { color: var(--ink); }
.band--paper p { color: var(--ink-2); }
.band--paper .kicker { color: var(--plum-2); }

/* ---------- figure larghe ---------- */
.figure-wide { margin: 30px 0; }
.figure-wide img { width: 100%; border: 1px solid var(--line); background: var(--card); }
.figure-wide figcaption {
  margin-top: 10px;
  font-family: var(--sans);
  font-size: 12.5px;
  color: var(--muted);
}
.figure-duo { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 30px 0; }
.figure-duo .figure-wide { margin: 0; }

/* ---------- offerta / uscita ---------- */
.offer {
  border: 2px solid var(--ink);
  background: var(--card);
  padding: 26px;
  margin: 30px 0;
}
.offer h2 { font-size: 26px; margin-bottom: 10px; }
.offer .cta-row { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; margin: 18px 0 12px; }

/* ---------- domande ---------- */
.faq { margin: 22px 0 10px; border-top: 1px solid var(--line); }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-item > button {
  width: 100%;
  display: flex;
  gap: 14px;
  align-items: baseline;
  text-align: left;
  background: none;
  border: 0;
  padding: 15px 0;
  cursor: pointer;
  font-family: var(--sans);
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
}
.faq-item > button::after {
  content: "+";
  margin-left: auto;
  font-family: var(--mono);
  font-size: 19px;
  color: var(--plum-2);
  line-height: 1;
}
.faq-item.is-open > button::after { content: "–"; }
.faq-answer { display: none; padding: 0 0 16px; }
.faq-item.is-open .faq-answer { display: block; }
.faq-answer p { font-size: 16.5px; color: var(--ink-2); margin-bottom: 0.8em; }
.faq-answer p:last-child { margin-bottom: 0; }

/* ---------- glossario ---------- */
.gloss { margin: 22px 0 10px; }
.gloss > div {
  display: grid;
  grid-template-columns: 190px 1fr;
  gap: 18px;
  padding: 14px 0;
  border-top: 1px solid var(--line-soft);
}
.gloss dt {
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--plum);
  padding-top: 3px;
}
.gloss dd { margin: 0; font-size: 16px; color: var(--ink-2); line-height: 1.55; }

/* ---------- pagine di testo ---------- */
.doc { padding: 34px 0 60px; }
.doc h1 { font-size: clamp(28px, 4.2vw, 40px); margin-bottom: 12px; }
.doc h2 { font-size: 19px; margin: 30px 0 8px; padding-top: 14px; border-top: 1px solid var(--line); }
.doc h3 { font-size: 16.5px; margin: 20px 0 6px; font-family: var(--sans); }
.doc p, .doc li { font-size: 16.5px; color: var(--ink-2); }
.doc ul, .doc ol { padding-left: 22px; margin: 10px 0 18px; }
.doc li { margin-bottom: 6px; }
.doc .stamp {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 22px;
  display: block;
}
.doc .addr {
  border: 1px solid var(--line);
  background: var(--card);
  padding: 16px 18px;
  margin: 18px 0;
  font-size: 16px;
}
.doc .addr strong { font-family: var(--sans); }

/* ---------- piede ---------- */
.foot { margin-top: 56px; background: var(--ink); color: #cfc9c1; }
.foot-top {
  display: grid;
  grid-template-columns: 1.2fr 1.1fr 0.9fr;
  gap: 30px;
  padding: 42px 0 30px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}
.foot .logo { color: #fff; }
.foot .logo i { color: #9d96a4; }
.foot-top p { font-size: 15px; line-height: 1.6; margin: 14px 0 0; }
.foot-top strong { color: #fff; font-family: var(--sans); }
.foot h3 {
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 400;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: #9d96a4;
  margin-bottom: 12px;
}
.foot-addr {
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.75;
  color: #a29ba8;
}
.foot-links { display: flex; flex-direction: column; gap: 7px; }
.foot-links a {
  color: #e7e2da;
  text-decoration: none;
  font-family: var(--sans);
  font-size: 14.5px;
  border-bottom: 1px solid transparent;
  width: fit-content;
}
.foot-links a:hover { border-bottom-color: var(--plum-2); }
.foot-reach a {
  display: block;
  color: #fff;
  font-family: var(--mono);
  font-size: 13.5px;
  text-decoration: none;
  margin-bottom: 6px;
}
.foot-legal { padding: 22px 0 34px; }
.foot-legal p {
  font-family: var(--sans);
  font-size: 12.5px;
  line-height: 1.6;
  color: #a29ba8;
  margin: 0 0 9px;
  max-width: 92ch;
}
.foot-legal strong { color: #efeae2; }
.foot-legal .rule-mono {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: #8f8896;
  margin-top: 16px;
}

/* ---------- adattamento ---------- */
@media (max-width: 1080px) {
  .body-shell { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .rail { display: none; }
  /* larghezza esplicita: con i soli margini automatici il blocco verrebbe
     dimensionato sul min-content delle tabelle e sforerebbe lo schermo */
  .article { max-width: var(--col); width: 100%; margin: 0 auto; }
  .numbers-grid { grid-template-columns: 1fr 1fr; }
  .numbers-grid > div:nth-child(3) { border-left: 0; }
  .numbers-grid > div:nth-child(n + 3) { border-top: 1px solid var(--line-soft); }
}

@media (max-width: 820px) {
  body { font-size: 17px; }
  .showcase-grid, .band .split, .triage, .figure-duo { grid-template-columns: 1fr; }
  .frame::after { display: none; }
  .foot-top { grid-template-columns: 1fr; }
  .mast-nav a:not(.btn) { display: none; }
  .mast-tag { display: none; }
  .gloss > div { grid-template-columns: 1fr; gap: 4px; }
  .band { padding: 24px 20px 16px; margin: 34px 0; }
  tbody th { width: auto; }
}

@media (max-width: 560px) {
  .numbers-grid { grid-template-columns: 1fr; }
  .numbers-grid > div { border-left: 0; border-top: 1px solid var(--line-soft); }
  .numbers-grid > div:first-child { border-top: 0; }
  .opener { padding: 32px 0 6px; }
  .offer { padding: 20px 16px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn { transition: none; }
  .progress { transition: none; }
}