/* Bordi animati — tre tecniche: gradiente conico con alone (.glow), bordo
   elettrico con filtro SVG (.electric), tratto a pennarello (.marker). */

/* Le animazioni continue girano solo quando la sezione è visibile (script.js
   aggiunge .is-live): fuori dallo schermo costerebbero CPU per niente. */
.stage:not(.is-live) *,
.stage:not(.is-live) *::before,
.stage:not(.is-live) *::after {
	animation-play-state: paused !important;
}

/* ——— 1. Gradiente conico con alone ——— */

@property --a {
	syntax: '<angle>';
	initial-value: 0deg;
	inherits: false;
}

.glows {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(min(100%, 13rem), 1fr));
	gap: 2.25rem;
	width: 100%;
	padding: 0.75rem;
}
.glow {
	--b: 0.375rem;
	box-sizing: border-box;
	width: 100%;
	height: auto;
	aspect-ratio: 1;
	object-fit: cover;
	border: solid var(--b) transparent;
	border-radius: calc(2 * var(--b));
	/* L'angolo di partenza è una proprietà registrata (@property --a): è ciò che
	   permette di animarlo e far girare il gradiente conico lungo il bordo. */
	background: repeating-conic-gradient(from var(--a, 0deg), var(--l, #0000 0% 70%, #0000ff7f)) border-box;
	filter: var(--f, url(#glow-0));
	animation: glow-turn 2.4s linear infinite;
}
/* Ogni alone gira solo se è lui stesso in vista: su telefono i tre riquadri sono impilati e
   ne vedi uno o due; il filtro SVG ricalcola il bordo a ogni fotogramma ed è la parte più cara. */
.glow:not(.is-live) {
	animation-play-state: paused;
}
@keyframes glow-turn {
	to {
		--a: 1turn;
	}
}

/* ——— 2. Bordo elettrico ——— */

.electric {
	--edge: var(--accent);
	--tint: color-mix(in srgb, var(--accent) 35%, transparent);
	position: relative;
	isolation: isolate;
	width: min(18rem, 100%);
	padding: 2px;
	border-radius: 1.5rem;
	background:
		linear-gradient(-30deg, var(--tint), transparent, var(--tint)),
		linear-gradient(#171717, #171717);
}
.electric__inner {
	position: relative;
}
.electric__outer {
	padding-right: 4px;
	padding-bottom: 4px;
	border: 2px solid color-mix(in srgb, var(--edge) 50%, transparent);
	border-radius: 1.5rem;
}
.electric__edge {
	width: 100%;
	height: 25rem;
	margin: -4px 0 0 -4px;
	border: 2px solid var(--edge);
	border-radius: 1.5rem;
	filter: url(#electric);
}
.electric__halo {
	position: absolute;
	inset: 0;
	border: 2px solid color-mix(in srgb, var(--edge) 60%, transparent);
	border-radius: 1.5rem;
	filter: blur(1px);
}
.electric__halo--2 {
	border-color: var(--edge);
	filter: blur(4px);
}
.electric__sheen {
	position: absolute;
	inset: 0;
	border-radius: 1.5rem;
	transform: scale(1.1);
	mix-blend-mode: overlay;
	opacity: 0.45;
	filter: blur(16px);
	background: linear-gradient(-30deg, #fff, transparent 30%, transparent 70%, #fff);
	pointer-events: none;
}
.electric__sheen--2 {
	opacity: 0.2;
}
.electric__bloom {
	position: absolute;
	inset: 0;
	z-index: -1;
	border-radius: 1.5rem;
	transform: scale(1.1);
	opacity: 0.3;
	filter: blur(32px);
	background: linear-gradient(-30deg, var(--edge), transparent, var(--edge));
}
.electric__content {
	position: absolute;
	inset: 0;
	display: flex;
	flex-direction: column;
	padding: 2.25rem;
}
.electric__badge {
	align-self: flex-start;
	position: relative;
	padding: 0.4rem 0.9rem;
	border-radius: 0.9rem;
	font-size: 0.75rem;
	font-weight: 700;
	letter-spacing: 0.06em;
	text-transform: uppercase;
	color: rgb(255 255 255 / 0.85);
	background: rgb(255 255 255 / 0.05);
	box-shadow: inset 0 0 0 1px rgb(255 255 255 / 0.22);
}
.electric h3 {
	margin-top: auto;
	font-size: 2rem;
	font-weight: 500;
}
.electric hr {
	margin: 1.25rem 0 1rem;
	height: 1px;
	border: 0;
	background: currentColor;
	opacity: 0.15;
}
.electric__text {
	font-size: 0.9375rem;
	line-height: 1.5;
	color: rgb(255 255 255 / 0.7);
}

/* ——— 3. Tratto a pennarello ——— */

.markers {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr));
	gap: 1.75rem;
	width: 100%;
	margin: 0;
	padding: 0;
	list-style: none;
}
.marker {
	position: relative;
	display: flex;
	padding: 1.25rem;
	isolation: isolate;
}
.marker svg {
	position: absolute;
	inset: 0;
	z-index: 1;
	width: 100%;
	height: 100%;
	overflow: visible;
	fill: none;
	pointer-events: none;
	filter: drop-shadow(0 0 0.6rem var(--c));
}
.marker path {
	stroke: var(--c);
	stroke-width: 3px;
	stroke-linecap: round;
	stroke-linejoin: round;
	vector-effect: non-scaling-stroke;
	stroke-dasharray: var(--dash);
	animation: marker-run var(--t) linear infinite;
}
@keyframes marker-run {
	to {
		stroke-dashoffset: -100;
	}
}
.marker figure {
	position: relative;
	margin: 0;
	padding: 1.75rem;
	width: 100%;
	border-radius: 0.6rem;
	background: #0d0d0d;
}
.marker figure::after {
	content: '';
	position: absolute;
	top: -0.9rem;
	right: -0.9rem;
	width: 3.4rem;
	height: 3.4rem;
	border: 0.9rem solid var(--c);
	border-radius: 50%;
	pointer-events: none;
}
.marker h3 {
	margin-bottom: 0.85rem;
	font-size: 1.5rem;
}
.marker p {
	padding-left: 1rem;
	border-left: 1px solid rgb(255 255 255 / 0.5);
	font-size: 0.9375rem;
	line-height: 1.55;
	color: #cfcfcf;
}