/* MGBlock – visualizzatore 3D e configuratore */
.mgb-viewer, .mgb-config {
	--mgb-ink: #1c1b19; --mgb-muted: #6e665d; --mgb-line: rgba(28,27,25,.1);
	--mgb-stage: radial-gradient(110% 90% at 50% 20%, #fbf9f6 0%, #eee8df 55%, #ddd5c9 100%);
}
.mgb-eyebrow {
	display: inline-flex; align-items: center; gap: 10px; margin: 0 0 8px;
	font: 700 12px/1 system-ui, sans-serif; letter-spacing: .26em; text-transform: uppercase; color: var(--mgb-red);
}
.mgb-eyebrow::before { content: ""; width: 26px; height: 2px; background: currentColor; }

.mgb-loader {
	position: absolute; left: 50%; top: 50%; width: 34px; height: 34px; margin: -17px 0 0 -17px;
	border: 3px solid rgba(0,0,0,.1); border-top-color: var(--mgb-red); border-radius: 50%;
	animation: mgb-spin .8s linear infinite;
}
.mgb-viewer.is-ready .mgb-loader, .is-ready > .mgb-loader, .is-static .mgb-loader { display: none; }
@keyframes mgb-spin { to { transform: rotate(360deg); } }

/* ---------- Visualizzatore ---------- */
.mgb-viewer { clear: both; margin: 48px 0 56px; }
.mgb-viewer__head { display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: 16px; margin-bottom: 16px; }
.mgb-viewer__title { margin: 0; font-size: clamp(24px, 3vw, 34px); line-height: 1.1; }
.mgb-viewer__stage {
	position: relative; height: clamp(320px, 52vw, 560px); background: var(--mgb-stage);
	border: 1px solid var(--mgb-line); overflow: hidden; cursor: grab;
}
.mgb-viewer__stage:active { cursor: grabbing; }
.mgb-viewer__stage canvas, .mgb-config__stage canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.mgb-viewer__foot { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 12px; margin-top: 12px; }
.mgb-viewer__hint { margin: 0; font-size: 13px; color: var(--mgb-muted); }
.mgb-viewer.is-static { display: none; }

.mgb-toggle { display: inline-flex; border: 1px solid var(--mgb-line); background: #fff; }
.mgb-toggle button {
	appearance: none; border: 0; background: transparent; cursor: pointer;
	padding: 10px 16px; font: 600 13px/1 system-ui, sans-serif; color: var(--mgb-ink);
}
.mgb-toggle button[aria-pressed="true"] { background: var(--mgb-ink); color: #fff; }

.mgb-link-arrow { font-weight: 700; color: var(--mgb-red); text-decoration: none; }
.mgb-link-arrow::after { content: " →"; transition: margin .2s; }
.mgb-link-arrow:hover::after { margin-left: 4px; }

/* ---------- Configuratore ---------- */
.mgb-config-wrap { padding: clamp(24px, 4vw, 56px) clamp(16px, 4vw, 48px) 72px; max-width: 1440px; margin: 0 auto; }
.mgb-config {
	display: grid; grid-template-columns: minmax(300px, 400px) 1fr; grid-template-areas: "intro view" "form view";
	gap: 22px clamp(20px, 3vw, 40px); align-items: start; color: var(--mgb-ink);
}
.mgb-config__intro { grid-area: intro; }
.mgb-config__form { grid-area: form; }
.mgb-config__view { grid-area: view; }
.mgb-config__title { margin: 0; font-size: clamp(30px, 3.6vw, 46px); line-height: 1.05; }
.mgb-config__lead { margin: 12px 0 0; color: var(--mgb-muted); line-height: 1.55; }
.mgb-config__form { display: grid; gap: 22px; }

.mgb-step { border: 0; margin: 0; padding: 0; min-width: 0; }
.mgb-step legend { display: flex; align-items: center; gap: 10px; padding: 0; margin-bottom: 12px; font-weight: 800; font-size: 15px; }
.mgb-step legend span {
	display: inline-grid; place-items: center; width: 24px; height: 24px; font-size: 12px;
	background: var(--mgb-red); color: #fff;
}

.mgb-choices { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.mgb-choice {
	position: relative; display: grid; gap: 3px; padding: 12px 12px 12px 14px; cursor: pointer;
	border: 1px solid var(--mgb-line); background: #fff; transition: border-color .15s, box-shadow .15s;
}
.mgb-choice input { position: absolute; opacity: 0; pointer-events: none; }
.mgb-choice__name { font-weight: 700; font-size: 14px; line-height: 1.2; }
.mgb-choice__sub { font-size: 12px; color: var(--mgb-muted); line-height: 1.3; }
.mgb-choice:hover { border-color: rgba(22,19,15,.35); }
.mgb-choice:has(input:checked) { border-color: var(--mgb-red); box-shadow: inset 3px 0 0 var(--mgb-red); }
.mgb-choice:has(input:focus-visible) { outline: 2px solid var(--mgb-red); outline-offset: 2px; }

.mgb-range { display: grid; grid-template-columns: 80px 1fr auto; align-items: center; gap: 12px; margin-bottom: 10px; }
.mgb-range label { font-weight: 600; font-size: 14px; }
.mgb-range input[type=range] { width: 100%; accent-color: var(--mgb-red); }
.mgb-range__num { display: inline-flex; align-items: center; gap: 4px; font-size: 14px; }
.mgb-range__num input { width: 64px; padding: 6px 8px; border: 1px solid var(--mgb-line); font: inherit; text-align: right; }
.mgb-config.is-fixed-h .mgb-range--h { opacity: .4; }
.mgb-note { margin: 6px 0 0; font-size: 12.5px; color: var(--mgb-muted); line-height: 1.45; }
.mgb-note--fixed { display: none; }
.mgb-config.is-fixed-h .mgb-note--fixed { display: block; }

.mgb-checks { display: grid; gap: 8px; margin-bottom: 12px; font-size: 14px; }
.mgb-checks input { accent-color: var(--mgb-red); margin-right: 6px; }
.mgb-input { width: 100%; padding: 11px 12px; border: 1px solid var(--mgb-line); font: inherit; font-size: 14px; background: #fff; }

.mgb-config__view { position: sticky; top: 90px; display: grid; gap: 0; grid-row: 1 / span 2; }
.mgb-config__stage { position: relative; height: clamp(340px, 52vh, 600px); background: var(--mgb-stage); border: 1px solid var(--mgb-line); border-bottom: 0; cursor: grab; }
.mgb-config__stage:active { cursor: grabbing; }
.mgb-config__summary {
	display: grid; grid-template-columns: 1fr auto; gap: 6px 24px; align-items: center;
	padding: 20px 22px; background: var(--mgb-ink); color: #fff;
}
.mgb-summary__label { grid-column: 1 / -1; margin: 0; font-size: 12px; letter-spacing: .18em; text-transform: uppercase; color: rgba(255,255,255,.6); }
.mgb-summary__big strong { font-size: 44px; line-height: 1; font-variant-numeric: tabular-nums; }
.mgb-summary__big span { color: rgba(255,255,255,.75); }
.mgb-summary__list { grid-column: 1; display: flex; flex-wrap: wrap; gap: 4px 22px; margin: 4px 0 0; font-size: 13.5px; }
.mgb-summary__list dt { color: rgba(255,255,255,.55); display: inline; margin-right: 6px; }
.mgb-summary__list dd { display: inline; margin: 0; font-weight: 600; }
.mgb-config__cta { grid-column: 2; grid-row: 2 / span 2; }
.mgb-config__summary .mgb-note { grid-column: 1 / -1; color: rgba(255,255,255,.5); }

.mgb-btn {
	display: inline-flex; align-items: center; justify-content: center; text-align: center;
	padding: 16px 22px; background: var(--mgb-red); color: #fff; text-decoration: none;
	font: 700 13px/1.2 system-ui, sans-serif; letter-spacing: .07em; text-transform: uppercase;
	transition: background .2s, transform .2s;
}
.mgb-btn:hover { background: var(--mgb-red-hover); color: #fff; transform: translateY(-2px); }

.mgb-config.is-static .mgb-config__stage { display: none; }

@media (max-width: 960px) {
	.mgb-config { grid-template-columns: 1fr; grid-template-areas: "intro" "view" "form"; }
	.mgb-config__view { position: relative; top: 0; grid-row: auto; }
	.mgb-config__stage { height: 300px; }
	.mgb-config__summary { grid-template-columns: 1fr; }
	.mgb-config__cta { grid-column: 1; grid-row: auto; }
}
@media (max-width: 480px) {
	.mgb-choices { grid-template-columns: 1fr; }
	.mgb-range { grid-template-columns: 1fr auto; }
	.mgb-range label { grid-column: 1 / -1; }
}

/* --- Forma del muro --- */
.mgb-shapes { display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px; margin-bottom: 18px; }
.mgb-shape { position: relative; display: flex; flex-direction: column; align-items: center; gap: 6px; padding: 12px 6px 10px; border: 1px solid var(--mgb-line); background: #fff; cursor: pointer; transition: border-color .2s, box-shadow .2s; }
.mgb-shape input { position: absolute; opacity: 0; pointer-events: none; }
.mgb-shape svg { width: 40px; height: 28px; fill: none; stroke: var(--mgb-ink, #1c1b19); stroke-width: 2.4; stroke-linejoin: round; stroke-linecap: round; opacity: .55; transition: opacity .2s, stroke .2s; }
.mgb-shape span { font-size: 12px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--mgb-ink, #1c1b19); }
.mgb-shape:hover { border-color: rgba(22,19,15,.35); }
.mgb-shape:has(input:checked) { border-color: var(--mgb-gold, #8a6d43); box-shadow: inset 0 -3px 0 var(--mgb-gold, #8a6d43); }
.mgb-shape:has(input:checked) svg { opacity: 1; stroke: var(--mgb-gold, #8a6d43); }
.mgb-shape:has(input:focus-visible) { outline: 2px solid var(--mgb-gold, #8a6d43); outline-offset: 2px; }
.mgb-range[hidden], .mgb-path[hidden] { display: none; }

/* --- Percorso libero --- */
.mgb-path { margin-bottom: 14px; }
.mgb-path__list { list-style: none; margin: 0 0 10px; padding: 0; display: grid; gap: 8px; }
.mgb-path__row { display: grid; grid-template-columns: 26px 1fr auto 28px; align-items: center; gap: 10px; padding: 8px 10px; border: 1px solid var(--mgb-line); background: #fff; }
.mgb-path__n { width: 26px; height: 26px; display: grid; place-items: center; border-radius: 50%; background: var(--mgb-ink, #1c1b19); color: #fff; font-size: 12px; font-weight: 700; }
.mgb-path__start { font-size: 13px; color: var(--mgb-muted, #6b665f); }
.mgb-path__row select { min-width: 0; height: 36px; padding: 0 8px; border: 1px solid var(--mgb-line); background: #fff; font: inherit; font-size: 14px; }
.mgb-path__del { width: 28px; height: 28px; border: 0; background: transparent; font-size: 20px; line-height: 1; color: var(--mgb-muted, #6b665f); cursor: pointer; }
.mgb-path__del:hover { color: var(--mgb-red, #8f2b24); }
.mgb-path__add { padding: 9px 14px; border: 1px dashed rgba(22,19,15,.35); background: transparent; font: inherit; font-size: 13px; font-weight: 700; letter-spacing: .04em; cursor: pointer; }
.mgb-path__add:hover { border-color: var(--mgb-gold, #8a6d43); color: var(--mgb-gold, #8a6d43); }
@media (max-width: 560px) {
	.mgb-shapes { grid-template-columns: repeat(3, 1fr); }
	.mgb-path__row { grid-template-columns: 26px 1fr 28px; }
	.mgb-path__row .mgb-range__num { grid-column: 2; }
}