@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,500;0,600;1,300;1,400&family=Jost:wght@300;400;500;600&display=swap');

:root {
  --navy: #0b1526;
  --navy2: #101d33;
  --navy3: #16233d;
  --gold: #b99a5b;
  --gold2: #d4b878;
  --gold3: #e8d4a0;
  --ink: #1a2233;
  --grey: #6b7280;
  --grey2: #9ca3af;
  --light: #f7f6f2;
  --light2: #efede8;
  --white: #ffffff;
  --serif: 'Cormorant Garamond', Georgia, 'Times New Roman', serif;
  --sans: 'Jost', 'Helvetica Neue', Arial, sans-serif;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: var(--serif); color: var(--ink); background: var(--white); line-height: 1.7; overflow-x: hidden; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* ── Typography ── */
.eyebrow {
  font-family: var(--sans);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: .4em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 20px;
}
h1, h2, h3, h4 { font-family: var(--serif); font-weight: 400; line-height: 1.18; }
h1 { font-size: clamp(38px, 6vw, 68px); }
h2 { font-size: clamp(28px, 4vw, 44px); margin-bottom: 24px; }
h3 { font-size: clamp(20px, 2.5vw, 26px); }
.lead { font-family: var(--serif); font-size: clamp(16px, 1.5vw, 19px); color: var(--grey); max-width: 740px; font-weight: 300; }
.sans { font-family: var(--sans); }

/* ── Layout ── */
.wrap { max-width: 1200px; margin: 0 auto; padding: 0 40px; }
section { padding: 108px 0; }
.section-intro { max-width: 680px; }

/* ── Gate ── */
#gate {
  position: fixed; inset: 0;
  background: rgba(11, 21, 38, .97);
  z-index: 2000;
  display: flex; align-items: center; justify-content: center;
  padding: 24px;
  backdrop-filter: blur(6px);
  opacity: 1;
  transition: opacity .5s;
}
#gate.fade-out { opacity: 0; pointer-events: none; }
#gate .box {
  max-width: 580px; width: 100%;
  background: var(--white);
  padding: 64px 56px;
  text-align: center;
  position: relative;
}
#gate .box::before {
  content: '';
  position: absolute; inset: 8px;
  border: 1px solid var(--gold);
  opacity: .35;
  pointer-events: none;
}
#gate .gate-logo {
  font-family: var(--sans); font-size: 11px; letter-spacing: .38em;
  text-transform: uppercase; color: var(--navy); margin-bottom: 32px;
}
#gate .gate-logo span { color: var(--gold); }
#gate h3 { font-size: 26px; margin-bottom: 16px; color: var(--navy); }
#gate p { font-size: 13.5px; color: var(--grey); line-height: 1.75; margin-bottom: 36px; }
#gate .gate-btns { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
#gate button {
  font-family: var(--sans); font-size: 11px; font-weight: 500;
  letter-spacing: .25em; text-transform: uppercase;
  padding: 16px 36px; cursor: pointer; border: 1px solid var(--navy);
  transition: all .25s;
}
#gate .yes { background: var(--navy); color: var(--white); }
#gate .yes:hover { background: var(--navy3); }
#gate .no { background: var(--white); color: var(--navy); }
#gate .no:hover { background: var(--light); }

/* ── Header ── */
header {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 900;
  background: rgba(11, 21, 38, .93);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(185, 154, 91, .12);
  transition: background .3s;
}
header.scrolled { background: rgba(11, 21, 38, .98); }
header .wrap { display: flex; align-items: center; justify-content: space-between; height: 80px; }
.logo {
  color: var(--white);
  font-family: var(--sans);
  font-size: 13px; font-weight: 500;
  letter-spacing: .32em;
  text-transform: uppercase;
  flex-shrink: 0;
  z-index: 1001;
  position: relative;
}
.logo span { color: var(--gold); }

nav.main-nav { display: flex; gap: 30px; align-items: center; }
nav.main-nav a {
  font-family: var(--sans); font-size: 11px; font-weight: 400;
  letter-spacing: .16em; text-transform: uppercase;
  color: rgba(255, 255, 255, .72);
  transition: color .2s;
  white-space: nowrap;
}
nav.main-nav a:hover, nav.main-nav a.active { color: var(--gold2); }

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column; gap: 5px;
  cursor: pointer; z-index: 1001; position: relative;
  background: none; border: none; padding: 6px;
}
.hamburger span {
  display: block; width: 26px; height: 1.5px;
  background: var(--white);
  transition: transform .35s, opacity .3s;
  transform-origin: center;
}
.hamburger.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* Mobile overlay nav */
.mobile-nav-overlay {
  position: fixed; inset: 0;
  background: var(--navy);
  z-index: 1000;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none;
  transition: opacity .4s;
}
.mobile-nav-overlay.open { opacity: 1; pointer-events: all; }
.mobile-nav-overlay nav {
  display: flex; flex-direction: column; align-items: center; gap: 0;
  text-align: center;
}
.mobile-nav-overlay nav a {
  font-family: var(--serif); font-size: clamp(26px, 5vw, 42px); font-weight: 300;
  color: rgba(255, 255, 255, .8);
  padding: 14px 0;
  display: block;
  border-bottom: 1px solid rgba(185, 154, 91, .12);
  width: 260px;
  transition: color .2s, padding-left .25s;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .4s, transform .4s, color .2s;
}
.mobile-nav-overlay.open nav a { opacity: 1; transform: translateY(0); }
.mobile-nav-overlay nav a:hover { color: var(--gold2); padding-left: 16px; }
.mobile-nav-overlay nav a:nth-child(1) { transition-delay: .05s; }
.mobile-nav-overlay nav a:nth-child(2) { transition-delay: .10s; }
.mobile-nav-overlay nav a:nth-child(3) { transition-delay: .15s; }
.mobile-nav-overlay nav a:nth-child(4) { transition-delay: .20s; }
.mobile-nav-overlay nav a:nth-child(5) { transition-delay: .25s; }
.mobile-nav-overlay nav a:nth-child(6) { transition-delay: .30s; }
.mobile-nav-overlay nav a:nth-child(7) { transition-delay: .35s; }
.mobile-nav-overlay nav a:nth-child(8) { transition-delay: .40s; }
.mobile-nav-overlay nav a:nth-child(9) { transition-delay: .45s; }
.mobile-nav-overlay nav a:nth-child(10) { transition-delay: .50s; }

/* ── Buttons ── */
.btn {
  display: inline-block;
  font-family: var(--sans); font-size: 11px; font-weight: 500;
  letter-spacing: .25em; text-transform: uppercase;
  padding: 17px 42px;
  border: 1px solid var(--gold);
  color: var(--gold2);
  transition: all .28s;
  position: relative; overflow: hidden;
}
.btn::after {
  content: '';
  position: absolute; inset: 0;
  background: var(--gold);
  transform: translateX(-101%);
  transition: transform .28s;
  z-index: -1;
}
.btn:hover { color: var(--navy); border-color: var(--gold); }
.btn:hover::after { transform: translateX(0); }

.btn-dark {
  border-color: var(--navy);
  color: var(--navy);
}
.btn-dark::after { background: var(--navy); }
.btn-dark:hover { color: var(--white); }

.btn-outline-white {
  border-color: rgba(255,255,255,.5);
  color: var(--white);
}
.btn-outline-white::after { background: var(--white); }
.btn-outline-white:hover { color: var(--navy); }

/* ── Hero ── */
.hero {
  min-height: 100vh;
  background: linear-gradient(155deg, var(--navy) 0%, var(--navy2) 55%, #16233d 100%);
  color: var(--white);
  display: flex; align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: 80px;
}
.hero::after {
  content: '';
  position: absolute; right: -200px; top: -200px;
  width: 700px; height: 700px;
  border: 1px solid rgba(185, 154, 91, .18);
  border-radius: 50%;
}
.hero::before {
  content: '';
  position: absolute; right: -100px; top: -100px;
  width: 480px; height: 480px;
  border: 1px solid rgba(185, 154, 91, .10);
  border-radius: 50%;
}
.hero-inner {
  position: absolute; left: -240px; bottom: -240px;
  width: 560px; height: 560px;
  border: 1px solid rgba(185, 154, 91, .08);
  border-radius: 50%;
}
.hero .wrap { position: relative; z-index: 2; padding-top: 80px; padding-bottom: 120px; }
.hero h1 { color: var(--white); margin-bottom: 32px; max-width: 860px; font-weight: 300; }
.hero h1 em { font-style: italic; color: var(--gold2); }
.hero .lead { color: rgba(255, 255, 255, .72); margin-bottom: 48px; font-size: 18px; }
.hero .cities {
  margin-top: 72px;
  font-family: var(--sans); font-size: 10px; font-weight: 400;
  letter-spacing: .42em; text-transform: uppercase;
  color: rgba(185, 154, 91, .75);
}
.hero .cities span { color: rgba(185, 154, 91, .35); margin: 0 8px; }

/* Page hero (sub-pages) */
.page-hero {
  background: linear-gradient(155deg, var(--navy) 0%, var(--navy2) 60%, #16233d 100%);
  color: var(--white);
  padding: 200px 0 120px;
  position: relative; overflow: hidden;
}
.page-hero::after {
  content: '';
  position: absolute; right: -180px; top: -180px;
  width: 600px; height: 600px;
  border: 1px solid rgba(185, 154, 91, .15);
  border-radius: 50%;
}
.page-hero .wrap { position: relative; z-index: 2; }
.page-hero h1 { color: var(--white); font-weight: 300; max-width: 740px; margin-bottom: 28px; }
.page-hero .lead { color: rgba(255, 255, 255, .68); }

/* ── Stats Band ── */
.band { background: var(--light); padding: 72px 0; border-bottom: 1px solid var(--light2); }
.band .wrap { display: grid; grid-template-columns: repeat(4, 1fr); gap: 48px; text-align: center; }
.stat-num {
  font-family: var(--serif); font-size: 52px; font-weight: 300;
  color: var(--navy); line-height: 1;
}
.stat-num sup { font-size: 24px; vertical-align: super; }
.stat-lbl {
  font-family: var(--sans); font-size: 10px; font-weight: 400;
  letter-spacing: .2em; text-transform: uppercase;
  color: var(--grey); margin-top: 12px;
}
.stat-divider { width: 32px; height: 1px; background: var(--gold); margin: 14px auto 0; opacity: .5; }

/* ── Strategy Cards ── */
.cards-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2px; margin-top: 60px; background: var(--light2); }
.strategy-card {
  background: var(--white);
  padding: 52px 44px;
  display: flex; flex-direction: column;
  transition: all .3s;
  position: relative; overflow: hidden;
}
.strategy-card::after {
  content: '';
  position: absolute; top: 0; left: 0; right: 0;
  height: 2px; background: var(--gold);
  transform: scaleX(0); transform-origin: left;
  transition: transform .3s;
}
.strategy-card:hover::after { transform: scaleX(1); }
.strategy-card:hover { transform: translateY(-4px); box-shadow: 0 24px 56px rgba(11,21,38,.10); z-index: 1; }
.strategy-card .tag {
  font-family: var(--sans); font-size: 10px; font-weight: 500;
  letter-spacing: .3em; text-transform: uppercase;
  color: var(--gold); margin-bottom: 18px;
}
.strategy-card h3 { font-size: 24px; margin-bottom: 16px; }
.strategy-card p { font-size: 15px; color: var(--grey); flex: 1; line-height: 1.75; }
.strategy-card .card-meta {
  margin-top: 28px; padding-top: 24px;
  border-top: 1px solid var(--light2);
}
.strategy-card .meta-row {
  display: flex; justify-content: space-between; align-items: baseline;
  padding: 6px 0;
  font-family: var(--sans); font-size: 11.5px;
  color: var(--grey);
}
.strategy-card .meta-row strong { color: var(--navy); font-weight: 500; text-align: right; }
.strategy-card .card-link {
  display: inline-block; margin-top: 28px;
  font-family: var(--sans); font-size: 10px; font-weight: 500;
  letter-spacing: .25em; text-transform: uppercase;
  color: var(--gold);
  transition: color .2s;
}
.strategy-card .card-link::after { content: ' →'; }
.strategy-card .card-link:hover { color: var(--gold2); }

/* ── Pillars ── */
.pillars-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2px; margin-top: 60px; background: rgba(255,255,255,.06); }
.pillar {
  padding: 48px 40px;
  background: var(--navy2);
  transition: background .25s;
  position: relative;
}
.pillar:hover { background: var(--navy3); }
.pillar-icon { margin-bottom: 24px; color: var(--gold); }
.pillar h3 { font-size: 20px; color: var(--gold2); margin-bottom: 14px; }
.pillar p { font-size: 14.5px; color: rgba(255,255,255,.62); line-height: 1.75; }

/* Alternating pillars layout (why.html) */
.pillar-row {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 0;
  border-bottom: 1px solid rgba(255,255,255,.07);
}
.pillar-row:last-child { border-bottom: none; }
.pillar-col {
  padding: 72px 64px;
}
.pillar-col.dark-col { background: var(--navy2); }
.pillar-col.light-col { background: var(--light); }
.pillar-col.light-col h3 { color: var(--navy); }
.pillar-col.light-col p { color: var(--grey); }
.pillar-col.light-col .pillar-icon { color: var(--gold); }
.pillar-col h3 { font-size: 26px; color: var(--gold2); margin-bottom: 16px; }
.pillar-col p { font-size: 15.5px; color: rgba(255,255,255,.65); line-height: 1.8; }

/* ── Team ── */
.team-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 36px; margin-top: 64px; }
.member-card {
  position: relative;
  border: 1px solid var(--light2);
  padding: 40px 36px;
  transition: box-shadow .3s;
}
.member-card:hover { box-shadow: 0 12px 40px rgba(11,21,38,.08); }
.member-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0;
  height: 2px; background: linear-gradient(90deg, var(--gold), var(--gold2));
}
.member-monogram {
  width: 72px; height: 72px;
  background: var(--navy);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 24px;
  font-family: var(--serif); font-size: 22px; font-weight: 400;
  color: var(--gold2);
  letter-spacing: .08em;
}
.member-card h3 { font-size: 22px; margin-bottom: 8px; }
.member-card .role {
  font-family: var(--sans); font-size: 10px; font-weight: 500;
  letter-spacing: .2em; text-transform: uppercase;
  color: var(--gold); margin-bottom: 18px;
}
.member-card p { font-size: 14px; color: var(--grey); line-height: 1.75; }

/* ── Offices / Hub Cards ── */
.hub-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; margin-top: 64px; }
.hub-card {
  background: var(--light);
  padding: 44px 36px;
  border-bottom: 2px solid transparent;
  transition: border-color .25s, box-shadow .25s;
}
.hub-card:hover { border-color: var(--gold); box-shadow: 0 8px 32px rgba(11,21,38,.07); }
.hub-card h4 {
  font-family: var(--sans); font-size: 11px; font-weight: 500;
  letter-spacing: .3em; text-transform: uppercase;
  color: var(--navy); margin-bottom: 8px;
}
.hub-card .hub-city { font-size: 28px; color: var(--navy); margin-bottom: 18px; }
.hub-card p { font-size: 14px; color: var(--grey); line-height: 1.75; }

/* ── Process Steps ── */
.process-steps { display: flex; gap: 0; margin-top: 64px; }
.process-step {
  flex: 1; padding: 36px 28px;
  border-right: 1px solid rgba(255,255,255,.08);
  position: relative;
}
.process-step:last-child { border-right: none; }
.step-num {
  font-family: var(--serif); font-size: 48px; font-weight: 300;
  color: rgba(185,154,91,.2); line-height: 1; margin-bottom: 16px;
}
.process-step h4 { font-size: 15px; color: var(--gold2); margin-bottom: 10px; }
.process-step p { font-size: 13px; color: rgba(255,255,255,.55); line-height: 1.7; }

/* ── Credit Division ── */
.credit-boxes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2px; margin-top: 56px; background: var(--light2); }
.credit-box {
  background: var(--white); padding: 44px 36px;
  transition: transform .25s, box-shadow .25s;
}
.credit-box:hover { transform: translateY(-4px); box-shadow: 0 16px 40px rgba(11,21,38,.09); }
.credit-box h4 {
  font-size: 20px; color: var(--navy); margin-bottom: 14px;
}
.credit-box p { font-size: 14.5px; color: var(--grey); line-height: 1.75; }

/* ── Divider ── */
.gold-divider { width: 48px; height: 1px; background: var(--gold); margin: 24px 0; opacity: .6; }

/* ── Contact Form ── */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; margin-top: 64px; align-items: start; }
.form-group { margin-bottom: 24px; }
.form-group label {
  display: block;
  font-family: var(--sans); font-size: 10px; font-weight: 500;
  letter-spacing: .25em; text-transform: uppercase;
  color: var(--grey); margin-bottom: 10px;
}
.form-group input, .form-group select, .form-group textarea {
  width: 100%;
  border: none; border-bottom: 1px solid var(--light2);
  padding: 12px 0;
  font-family: var(--serif); font-size: 16px; color: var(--ink);
  background: transparent;
  outline: none;
  transition: border-color .2s;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  border-color: var(--gold);
}
.form-group textarea { resize: vertical; min-height: 120px; }
.form-group select { appearance: none; cursor: pointer; }
.form-note {
  font-family: var(--sans); font-size: 11px; color: var(--grey2);
  line-height: 1.7; margin-top: 20px;
}

/* ── Scroll Reveal ── */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity .7s ease, transform .7s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: .1s; }
.reveal-delay-2 { transition-delay: .2s; }
.reveal-delay-3 { transition-delay: .3s; }
.reveal-delay-4 { transition-delay: .4s; }
.reveal-delay-5 { transition-delay: .5s; }

/* ── Dark Section ── */
.dark { background: var(--navy); color: var(--white); }
.dark h2 { color: var(--white); }
.dark .lead { color: rgba(255,255,255,.65); }
.dark .eyebrow { color: var(--gold); }

/* ── Light Alt Section ── */
.light-alt { background: var(--light); }

/* ── Fund Doc CTA ── */
.fund-doc-box {
  background: var(--navy);
  padding: 72px 64px;
  margin-top: 80px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.fund-doc-box::before {
  content: '';
  position: absolute; inset: 12px;
  border: 1px solid rgba(185,154,91,.2);
  pointer-events: none;
}
.fund-doc-box h3 { font-size: 32px; color: var(--white); margin-bottom: 18px; }
.fund-doc-box p { font-size: 15px; color: rgba(255,255,255,.62); max-width: 560px; margin: 0 auto 36px; }

/* ── Footer ── */
footer {
  background: var(--navy);
  color: rgba(255,255,255,.5);
  padding: 72px 0 52px;
  font-family: var(--sans); font-size: 12px;
  line-height: 1.8;
}
footer .footer-logo {
  font-size: 11px; letter-spacing: .34em; text-transform: uppercase;
  color: rgba(255,255,255,.7);
  margin-bottom: 36px;
}
footer .footer-logo span { color: var(--gold); }
footer .disc {
  max-width: 960px; margin-bottom: 40px;
  color: rgba(255,255,255,.42);
  font-size: 11.5px; line-height: 1.85;
}
footer .footer-grid {
  display: grid; grid-template-columns: 1fr 2fr;
  gap: 80px; margin-bottom: 52px;
}
footer .footer-nav {
  display: flex; flex-direction: column; gap: 10px;
}
footer .footer-nav a {
  font-size: 11px; letter-spacing: .15em; text-transform: uppercase;
  color: rgba(255,255,255,.45);
  transition: color .2s;
}
footer .footer-nav a:hover { color: var(--gold); }
footer hr { border: none; border-top: 1px solid rgba(255,255,255,.08); margin-bottom: 28px; }
footer .base {
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 12px;
  font-size: 10.5px; letter-spacing: .14em; text-transform: uppercase;
  color: rgba(255,255,255,.3);
}

/* ── Strategy Page Layout ── */
.strategy-detail { display: grid; grid-template-columns: 3fr 2fr; gap: 80px; align-items: start; margin-top: 64px; }
.strategy-sidebar {
  background: var(--light); padding: 48px 40px;
  position: sticky; top: 100px;
}
.sidebar-row {
  padding: 14px 0;
  border-bottom: 1px solid var(--light2);
  display: flex; flex-direction: column; gap: 4px;
}
.sidebar-row:last-child { border-bottom: none; }
.sidebar-label {
  font-family: var(--sans); font-size: 10px; font-weight: 500;
  letter-spacing: .22em; text-transform: uppercase; color: var(--grey);
}
.sidebar-value { font-family: var(--serif); font-size: 16px; color: var(--navy); }

/* ── Misc Utility ── */
.text-center { text-align: center; }
.text-gold { color: var(--gold); }
.mt-sm { margin-top: 32px; }
.mt-md { margin-top: 56px; }
.mt-lg { margin-top: 80px; }
.mb-sm { margin-bottom: 32px; }
.note {
  font-family: var(--sans); font-size: 11px; color: var(--grey2);
  margin-top: 28px; line-height: 1.7;
}

/* ── Responsive ── */
@media (max-width: 1024px) {
  .contact-grid { grid-template-columns: 1fr; gap: 56px; }
  .strategy-detail { grid-template-columns: 1fr; }
  .strategy-sidebar { position: static; }
  .pillar-row { grid-template-columns: 1fr; }
  nav.main-nav { display: none; }
  .hamburger { display: flex; }
}

@media (max-width: 768px) {
  .wrap { padding: 0 24px; }
  section { padding: 72px 0; }
  .cards-grid, .pillars-grid, .team-grid, .hub-grid, .credit-boxes { grid-template-columns: 1fr; gap: 2px; }
  .band .wrap { grid-template-columns: repeat(2,1fr); }
  .process-steps { flex-direction: column; }
  .process-step { border-right: none; border-bottom: 1px solid rgba(255,255,255,.08); }
  .process-step:last-child { border-bottom: none; }
  footer .footer-grid { grid-template-columns: 1fr; gap: 40px; }
  .fund-doc-box { padding: 48px 32px; }
  .pillar-col { padding: 48px 32px; }
  .hero .wrap { padding-top: 40px; padding-bottom: 80px; }
  .page-hero { padding: 160px 0 80px; }
}

@media (max-width: 480px) {
  .band .wrap { grid-template-columns: 1fr; }
  .stat-num { font-size: 40px; }
  #gate .box { padding: 44px 28px; }
}

/* ── GGCAM-3d (QA mobile 2026-07-21): fix overflow orizzontale su phone ──
   Molte sezioni usano display:grid con grid-template-columns definite come
   STYLE INLINE nell'HTML (strategies, team, presence, alternative-credit…):
   le media query normali non possono sovrascriverle. Su viewport ≤640px
   forziamo il collasso a colonna singola con !important. */
@media (max-width: 640px) {
  div[style*="grid-template-columns"] { grid-template-columns: 1fr !important; }
}