/**
 * Nut lien he noi. Xem `inc/lien-he-noi.php`.
 *
 * File nay KHONG chua mau thuong hieu cua tung mang xa hoi: mau di theo tung nut duoi dang
 * bien `--ivi-lh-mau` do PHP dat, vi mau la du lieu chu web sua duoc chu khong phai kieu dang.
 */

.ivi-lienhe {
	--ivi-lh-co: 52px;
	--ivi-lh-ngang: 20px;
	--ivi-lh-doc: 20px;
	--ivi-lh-khe: 10px;
	--ivi-lh-chu: #fff;
	--ivi-lh-bo: 50%;

	position: fixed;
	z-index: 999;
	display: flex;
	flex-direction: column;
	align-items: center;
	gap: var(--ivi-lh-khe);
	pointer-events: none;
}

.ivi-lienhe > * {
	pointer-events: auto;
}

/* --- Vi tri --------------------------------------------------------------- */

.ivi-lienhe--duoi-phai,
.ivi-lienhe--duoi-trai,
.ivi-lienhe--duoi-giua {
	bottom: var(--ivi-lh-doc);
	flex-direction: column-reverse;
}

.ivi-lienhe--tren-phai,
.ivi-lienhe--tren-trai,
.ivi-lienhe--tren-giua {
	top: var(--ivi-lh-doc);
}

.ivi-lienhe--duoi-phai,
.ivi-lienhe--tren-phai,
.ivi-lienhe--giua-phai {
	right: var(--ivi-lh-ngang);
	align-items: flex-end;
}

.ivi-lienhe--duoi-trai,
.ivi-lienhe--tren-trai,
.ivi-lienhe--giua-trai {
	left: var(--ivi-lh-ngang);
	align-items: flex-start;
}

.ivi-lienhe--duoi-giua,
.ivi-lienhe--tren-giua {
	left: 50%;
	transform: translateX(-50%);
}

.ivi-lienhe--giua-phai,
.ivi-lienhe--giua-trai {
	top: 50%;
	transform: translateY(-50%);
}

/* --- Khung chua cac nut --------------------------------------------------- */

.ivi-lienhe__khung {
	display: flex;
	gap: var(--ivi-lh-khe);
}

.ivi-lienhe--doc .ivi-lienhe__khung {
	flex-direction: column;
}

.ivi-lienhe--ngang .ivi-lienhe__khung {
	flex-direction: row;
	flex-wrap: wrap;
	justify-content: center;
}

/* --- Nut ------------------------------------------------------------------ */

.ivi-lienhe__nut,
.ivi-lienhe__nut-gom {
	display: flex;
	align-items: center;
	justify-content: center;
	width: var(--ivi-lh-co);
	height: var(--ivi-lh-co);
	padding: 0;
	border: 0;
	border-radius: var(--ivi-lh-bo);
	background: var(--ivi-lh-mau, var(--primary-color));
	color: var(--ivi-lh-chu);
	box-shadow: 0 4px 14px rgba(0, 0, 0, 0.22);
	text-decoration: none;
	cursor: pointer;
	transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.ivi-lienhe__nut:hover,
.ivi-lienhe__nut:focus-visible,
.ivi-lienhe__nut-gom:hover,
.ivi-lienhe__nut-gom:focus-visible {
	color: var(--ivi-lh-chu);
	transform: scale(1.08);
	box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.ivi-lienhe--bo-goc {
	--ivi-lh-bo: 14px;
}

.ivi-lienhe--vuong {
	--ivi-lh-bo: 0;
}

.ivi-lienhe__hieu {
	display: flex;
	align-items: center;
	justify-content: center;
	flex: 0 0 var(--ivi-lh-co);
	width: var(--ivi-lh-co);
	height: var(--ivi-lh-co);
	line-height: 1;
}

.ivi-lienhe__hieu i {
	font-size: calc(var(--ivi-lh-co) * 0.42);
	line-height: 1;
}

.ivi-lienhe__hieu b {
	font-size: calc(var(--ivi-lh-co) * 0.24);
	font-weight: 700;
	letter-spacing: -0.02em;
}

.ivi-lienhe__hieu img {
	width: calc(var(--ivi-lh-co) * 0.56);
	height: calc(var(--ivi-lh-co) * 0.56);
	object-fit: contain;
}

/* --- Nhan chu ------------------------------------------------------------- */

.ivi-lienhe__chu {
	font-size: 13px;
	font-weight: 600;
	line-height: 1;
	white-space: nowrap;
}

/* An han: khong ai doc, nhung trinh doc man hinh van co `aria-label` tren the <a>. */
.ivi-lienhe--nhan-an .ivi-lienhe__chu {
	position: absolute;
	width: 1px;
	height: 1px;
	overflow: hidden;
	clip: rect(0 0 0 0);
	clip-path: inset(50%);
	white-space: nowrap;
}

/* Luon hien: nut gian thanh vien thuoc. */
.ivi-lienhe--nhan-luon .ivi-lienhe__nut {
	width: auto;
	padding-right: 16px;
	gap: 2px;
}

.ivi-lienhe--nhan-luon.ivi-lienhe--tron {
	--ivi-lh-bo: calc(var(--ivi-lh-co) / 2);
}

/* Hien khi re chuot: nhan noi ben canh, khong lam nut xe dich. */
.ivi-lienhe--nhan-reo .ivi-lienhe__nut {
	position: relative;
}

.ivi-lienhe--nhan-reo .ivi-lienhe__chu {
	position: absolute;
	top: 50%;
	padding: 7px 12px;
	border-radius: 6px;
	background: var(--ivi-lh-mau, var(--primary-color));
	color: var(--ivi-lh-chu);
	opacity: 0;
	visibility: hidden;
	transform: translateY(-50%);
	transition: opacity 0.18s ease, visibility 0.18s ease;
}

.ivi-lienhe--nhan-reo .ivi-lienhe__nut:hover .ivi-lienhe__chu,
.ivi-lienhe--nhan-reo .ivi-lienhe__nut:focus-visible .ivi-lienhe__chu {
	opacity: 1;
	visibility: visible;
}

.ivi-lienhe--nhan-reo.ivi-lienhe--duoi-phai .ivi-lienhe__chu,
.ivi-lienhe--nhan-reo.ivi-lienhe--tren-phai .ivi-lienhe__chu,
.ivi-lienhe--nhan-reo.ivi-lienhe--giua-phai .ivi-lienhe__chu {
	right: calc(100% + 10px);
}

.ivi-lienhe--nhan-reo.ivi-lienhe--duoi-trai .ivi-lienhe__chu,
.ivi-lienhe--nhan-reo.ivi-lienhe--tren-trai .ivi-lienhe__chu,
.ivi-lienhe--nhan-reo.ivi-lienhe--giua-trai .ivi-lienhe__chu,
.ivi-lienhe--nhan-reo.ivi-lienhe--duoi-giua .ivi-lienhe__chu,
.ivi-lienhe--nhan-reo.ivi-lienhe--tren-giua .ivi-lienhe__chu {
	left: calc(100% + 10px);
}

/* --- Hieu ung gon song ---------------------------------------------------- */

.ivi-lienhe--song .ivi-lienhe__nut::after {
	content: "";
	position: absolute;
	inset: 0;
	border-radius: inherit;
	box-shadow: 0 0 0 0 var(--ivi-lh-mau, var(--primary-color));
	animation: ivi-lienhe-song 2s ease-out infinite;
	pointer-events: none;
}

.ivi-lienhe--song .ivi-lienhe__nut {
	position: relative;
}

@keyframes ivi-lienhe-song {
	0% {
		box-shadow: 0 0 0 0 var(--ivi-lh-mau, var(--primary-color));
		opacity: 0.7;
	}
	100% {
		box-shadow: 0 0 0 18px var(--ivi-lh-mau, var(--primary-color));
		opacity: 0;
	}
}

/* --- Thu gon thanh mot nut ------------------------------------------------ */

.ivi-lienhe__nut-gom {
	--ivi-lh-mau: var(--primary-color);
}

.ivi-lienhe__nut-gom i {
	font-size: calc(var(--ivi-lh-co) * 0.42);
}

.ivi-lienhe--gom .ivi-lienhe__khung {
	display: none;
}

.ivi-lienhe--gom.is-mo .ivi-lienhe__khung {
	display: flex;
}

.ivi-lienhe__hieu-mo,
.ivi-lienhe--gom.is-mo .ivi-lienhe__hieu-dong {
	display: none;
}

.ivi-lienhe--gom.is-mo .ivi-lienhe__hieu-mo {
	display: block;
}

/* --- Thiet bi ------------------------------------------------------------- */

@media (max-width: 549px) {
	.ivi-lienhe {
		--ivi-lh-co: 46px;
		--ivi-lh-khe: 8px;
	}

	.ivi-lienhe--an-dien-thoai {
		display: none;
	}
}

@media (min-width: 550px) {
	.ivi-lienhe--an-may-tinh {
		display: none;
	}
}

@media print {
	.ivi-lienhe {
		display: none;
	}
}

@media (prefers-reduced-motion: reduce) {
	.ivi-lienhe__nut,
	.ivi-lienhe__nut-gom,
	.ivi-lienhe__chu {
		transition: none;
	}

	.ivi-lienhe--song .ivi-lienhe__nut::after {
		animation: none;
	}
}