/**
 * Goxom Accordion.
 *
 * Each item is one white card. The open one gets a coloured accent bar on the
 * left, its number and title take the accent, and the plus turns into a
 * minus. Open/close is still Bootstrap's collapse (the theme ships it), so
 * this file is only styling.
 *
 * Three rule sets style the same markup: Bootstrap's `.accordion-*`, the
 * theme's generic `.accordion` component in main.css, and this file. The
 * selectors below start with `.goxom-accordion.accordion` so they outrank the
 * theme's four-class chains whatever order the sheets load in. Colours, radius
 * and spacing are custom properties, which is what the widget's style controls
 * set, so those still win over the long selectors here.
 */

.goxom-accordion {
	--gx-acc-accent: var(--color-primary, #1273C4);
	--gx-acc-title: var(--color-black, #0C2338);
	--gx-acc-text: var(--color-body, #5A7387);
	--gx-acc-bg: var(--color-white, #ffffff);
	--gx-acc-border: var(--color-border, #D5E3EF);
	--gx-acc-radius: 20px;
	--gx-acc-gap: 16px;
	--gx-acc-pad-x: 26px;
	--gx-acc-pad-y: 22px;
	--gx-acc-num: 46px;
	--gx-acc-col-gap: 18px;
	--gx-acc-ease: cubic-bezier(.2, .8, .2, 1);

	--bs-accordion-bg: transparent;
	--bs-accordion-border-width: 0;
	--bs-accordion-btn-focus-box-shadow: none;
}

/* ------------------------------------------------------------------ item */

.goxom-accordion.accordion .accordion-item {
	position: relative;
	margin: 0 0 var(--gx-acc-gap);
	overflow: hidden;
	border: 1px solid var(--gx-acc-border);
	border-radius: var(--gx-acc-radius);
	background: var(--gx-acc-bg);
	box-shadow: 0 1px 2px rgba(12, 35, 56, .04);
	transition: border-color .35s, box-shadow .45s var(--gx-acc-ease), transform .45s var(--gx-acc-ease);
}

.goxom-accordion.accordion .accordion-item:last-child {
	margin-bottom: 0;
}

/* The accent bar. Off to the left until its item opens. */
.goxom-accordion.accordion .accordion-item::before {
	content: "";
	position: absolute;
	top: 0;
	bottom: 0;
	left: 0;
	z-index: 1;
	width: 4px;
	background: linear-gradient(180deg, var(--gx-acc-accent), color-mix(in srgb, var(--gx-acc-accent) 55%, #0E9BA8));
	transform: translateX(-4px);
	transition: transform .45s var(--gx-acc-ease);
}

.goxom-accordion.accordion .accordion-item:hover {
	border-color: color-mix(in srgb, var(--gx-acc-accent) 28%, var(--gx-acc-border));
	box-shadow: 0 16px 34px -22px rgba(12, 35, 56, .3);
}

.goxom-accordion.accordion .accordion-item:has(.accordion-button:not(.collapsed)) {
	border-color: color-mix(in srgb, var(--gx-acc-accent) 35%, var(--gx-acc-border));
	box-shadow: 0 26px 50px -28px color-mix(in srgb, var(--gx-acc-accent) 55%, rgba(12, 35, 56, .5));
}

.goxom-accordion.accordion .accordion-item:has(.accordion-button:not(.collapsed))::before {
	transform: none;
}

/* ---------------------------------------------------------------- header */

.goxom-accordion.accordion .accordion-item .accordion-header {
	margin: 0;
	padding: 0;
	font-size: inherit;
	line-height: inherit;
}

.goxom-accordion.accordion .accordion-item .accordion-header .accordion-button,
.goxom-accordion.accordion .accordion-item .accordion-header .accordion-button.collapsed,
.goxom-accordion.accordion .accordion-item .accordion-header .accordion-button:not(.collapsed) {
	display: flex;
	align-items: center;
	gap: var(--gx-acc-col-gap);
	width: 100%;
	padding: var(--gx-acc-pad-y) var(--gx-acc-pad-x);
	border: 0;
	border-radius: 0;
	background: transparent;
	box-shadow: none;
	color: var(--gx-acc-title);
	text-align: left;
	text-transform: none;
	cursor: pointer;
	transition: color .3s;
}

/* Bootstrap's own chevron. */
.goxom-accordion.accordion .accordion-item .accordion-header .accordion-button::after {
	display: none;
}

.goxom-accordion.accordion .accordion-item .accordion-header .accordion-button:focus {
	outline: 0;
	box-shadow: none;
}

.goxom-accordion.accordion .accordion-item .accordion-header .accordion-button:focus-visible {
	outline: 0;
	box-shadow: inset 0 0 0 2px color-mix(in srgb, var(--gx-acc-accent) 55%, transparent);
	border-radius: var(--gx-acc-radius);
}

/* Number. */
.goxom-accordion .accordion-num {
	flex: 0 0 var(--gx-acc-num);
	display: inline-flex;
	align-items: center;
	justify-content: center;
	width: var(--gx-acc-num);
	height: var(--gx-acc-num);
	border-radius: 14px;
	background: color-mix(in srgb, var(--gx-acc-accent) 9%, transparent);
	font-family: var(--font-title, inherit);
	font-size: 14px;
	font-weight: 700;
	font-variant-numeric: tabular-nums;
	letter-spacing: .02em;
	color: var(--gx-acc-accent);
	transition: background-color .35s, color .35s, box-shadow .35s, transform .45s var(--gx-acc-ease);
}

.goxom-accordion .accordion-button:not(.collapsed) .accordion-num {
	background: linear-gradient(135deg, color-mix(in srgb, var(--gx-acc-accent) 75%, #ffffff), var(--gx-acc-accent));
	color: #fff;
	box-shadow: 0 10px 20px -8px color-mix(in srgb, var(--gx-acc-accent) 70%, transparent);
}

/* Title. */
.goxom-accordion .accordion-title {
	flex: 1 1 auto;
	min-width: 0;
	font-family: var(--font-title, inherit);
	font-size: clamp(16px, .55vw + 13px, 19px);
	font-weight: 700;
	line-height: 1.4;
	letter-spacing: -.01em;
	color: inherit;
}

.goxom-accordion .accordion-button:hover .accordion-title,
.goxom-accordion .accordion-button:not(.collapsed) .accordion-title {
	color: var(--gx-acc-accent);
}

/* Plus that turns into a minus: two bars, the upright one folds flat. */
.goxom-accordion .accordion-icon {
	position: relative;
	flex: 0 0 40px;
	width: 40px;
	height: 40px;
	border: 1px solid var(--gx-acc-border);
	border-radius: 50%;
	background: var(--gx-acc-bg);
	color: var(--gx-acc-title);
	transition: background-color .35s, border-color .35s, color .35s, transform .5s var(--gx-acc-ease), box-shadow .35s;
}

.goxom-accordion .accordion-icon::before,
.goxom-accordion .accordion-icon::after {
	content: "";
	position: absolute;
	top: 50%;
	left: 50%;
	width: 13px;
	height: 2px;
	margin: -1px 0 0 -6.5px;
	border-radius: 2px;
	background: currentColor;
	transition: transform .45s var(--gx-acc-ease);
}

.goxom-accordion .accordion-icon::after {
	transform: rotate(90deg);
}

.goxom-accordion .accordion-button:hover .accordion-icon {
	border-color: var(--gx-acc-accent);
	color: var(--gx-acc-accent);
}

.goxom-accordion .accordion-button:not(.collapsed) .accordion-icon {
	border-color: var(--gx-acc-accent);
	background: var(--gx-acc-accent);
	color: #fff;
	transform: rotate(180deg);
	box-shadow: 0 10px 20px -8px color-mix(in srgb, var(--gx-acc-accent) 70%, transparent);
}

.goxom-accordion .accordion-button:not(.collapsed) .accordion-icon::after {
	transform: rotate(0deg);
}

/* ------------------------------------------------------------------ body */

.goxom-accordion.accordion .accordion-item .accordion-collapse {
	background: transparent;
}

.goxom-accordion.accordion .accordion-item .accordion-body {
	padding: 0 var(--gx-acc-pad-x) calc(var(--gx-acc-pad-y) + 4px);
	border: 0;
	border-radius: 0;
	background: transparent;
	font-size: 15.5px;
	line-height: 1.75;
	color: var(--gx-acc-text);
}

/* Text lines up under the title, not under the number. */
.goxom-accordion--numbered.accordion .accordion-item .accordion-body {
	padding-left: calc(var(--gx-acc-pad-x) + var(--gx-acc-num) + var(--gx-acc-col-gap));
	padding-right: calc(var(--gx-acc-pad-x) + 40px + var(--gx-acc-col-gap));
}

.goxom-accordion.accordion .accordion-item .accordion-body p {
	margin: 0;
	color: inherit;
	text-transform: none;
}

.goxom-accordion.accordion .accordion-item .accordion-body p + p,
.goxom-accordion.accordion .accordion-item .accordion-body ul,
.goxom-accordion.accordion .accordion-item .accordion-body ol {
	margin-top: 12px;
}

.goxom-accordion .accordion-body ul,
.goxom-accordion .accordion-body ol {
	margin-bottom: 0;
	padding-left: 20px;
}

.goxom-accordion .accordion-body li + li {
	margin-top: 6px;
}

.goxom-accordion .accordion-body li::marker {
	color: var(--gx-acc-accent);
}

.goxom-accordion .accordion-body a {
	color: var(--gx-acc-accent);
	text-decoration: underline;
	text-decoration-thickness: 1px;
	text-underline-offset: 3px;
}

.goxom-accordion .accordion-body strong {
	color: var(--gx-acc-title);
}

/* The height is Bootstrap's transition; the text fades up inside it. */
.goxom-accordion .accordion-collapse.show .accordion-body,
.goxom-accordion .accordion-collapse.collapsing .accordion-body {
	animation: gx-acc-in .5s var(--gx-acc-ease) both;
}

@keyframes gx-acc-in {
	from {
		opacity: 0;
		transform: translateY(-6px);
	}

	to {
		opacity: 1;
		transform: none;
	}
}

/* ---------------------------------------------------------------- mobile */

@media (max-width: 575px) {
	.goxom-accordion {
		--gx-acc-pad-x: 16px;
		--gx-acc-pad-y: 16px;
		--gx-acc-num: 36px;
		--gx-acc-col-gap: 12px;
		--gx-acc-radius: 16px;
		--gx-acc-gap: 12px;
	}

	.goxom-accordion .accordion-num {
		border-radius: 11px;
		font-size: 12.5px;
	}

	.goxom-accordion .accordion-icon {
		flex-basis: 34px;
		width: 34px;
		height: 34px;
	}

	/* Too narrow to spend the indent; the text takes the full width. */
	.goxom-accordion--numbered.accordion .accordion-item .accordion-body {
		padding-left: var(--gx-acc-pad-x);
		padding-right: var(--gx-acc-pad-x);
		font-size: 15px;
	}
}

@media (prefers-reduced-motion: reduce) {
	.goxom-accordion.accordion .accordion-item,
	.goxom-accordion.accordion .accordion-item::before,
	.goxom-accordion .accordion-num,
	.goxom-accordion .accordion-icon,
	.goxom-accordion .accordion-icon::before,
	.goxom-accordion .accordion-icon::after {
		transition: none;
	}

	.goxom-accordion .accordion-collapse.show .accordion-body,
	.goxom-accordion .accordion-collapse.collapsing .accordion-body {
		animation: none;
	}
}

/* color-mix is recent; without it the tints resolve to nothing. */
@supports not (color: color-mix(in srgb, red 50%, blue)) {
	.goxom-accordion .accordion-num {
		background: rgba(18, 115, 196, .09);
	}

	.goxom-accordion .accordion-button:not(.collapsed) .accordion-num {
		background: var(--gx-acc-accent);
	}

	.goxom-accordion.accordion .accordion-item::before {
		background: var(--gx-acc-accent);
	}
}