/**
 * RSMo Menu Header styles.
 *
 * Two states: transparent (top of page) and scrolled (solid background).
 * Breakpoint: 768px and below is the mobile layout.
 */

.rsmomenu-header {
	--rsmomenu-scrolled-bg: #ffffff;
	--rsmomenu-solid-color: #505050;
	--rsmomenu-divider: rgba( 255, 255, 255, 0.7 );
	--rsmomenu-desktop-height: 103px;
	--rsmomenu-desktop-height-scrolled: 100px;
	--rsmomenu-mobile-height: 70px;
	--rsmomenu-transparent-padding-top: 50px;
	--rsmomenu-logo-width: 185px;
	--rsmomenu-logo-width-mobile: 150px;
	--rsmomenu-font-size: clamp( 13px, 1.33vw, 17px );

	position: relative;
	z-index: 100;
	box-sizing: border-box;
	width: 100%;
	color: #ffffff;
	background-color: transparent;
	font-family: "Noto Serif TC", "PingFang TC", "Microsoft JhengHei", serif;
	transition: background-color 0.3s ease, color 0.3s ease;
}

.rsmomenu-header *,
.rsmomenu-header *::before,
.rsmomenu-header *::after {
	box-sizing: border-box;
}

.rsmomenu-header--scrolled {
	color: var( --rsmomenu-solid-color );
	background-color: var( --rsmomenu-scrolled-bg );
}

.rsmomenu-header .screen-reader-text {
	position: absolute !important;
	width: 1px;
	height: 1px;
	margin: -1px;
	padding: 0;
	overflow: hidden;
	clip: rect( 0, 0, 0, 0 );
	white-space: nowrap;
	border: 0;
}

.rsmomenu-notice {
	padding: 12px 20px;
	color: #8a6d3b;
	background: #fcf8e3;
	font-size: 14px;
}

/* -----------------------------------------------------------------------
 * Layout shell
 * -------------------------------------------------------------------- */

.rsmomenu-header__inner {
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	gap: 24px;
	width: 100%;
	min-height: var( --rsmomenu-desktop-height );
	padding: var( --rsmomenu-transparent-padding-top ) clamp( 20px, 3vw, 70px ) 0;
	transition: min-height 0.3s ease, padding 0.3s ease;
}

.rsmomenu-header--scrolled .rsmomenu-header__inner {
	flex-direction: row;
	align-items: center;
	justify-content: space-between;
	gap: 20px;
	min-height: var( --rsmomenu-desktop-height-scrolled );
	padding: 0 clamp( 20px, 3vw, 70px );
}

/* -----------------------------------------------------------------------
 * Logo
 * -------------------------------------------------------------------- */

.rsmomenu-header__logo {
	display: inline-flex;
	align-items: center;
	flex: 0 0 auto;
	max-width: 100%;
	text-decoration: none;
	line-height: 0;
}

.rsmomenu-header .rsmomenu-header__logo img.rsmomenu-header__logo-img {
	display: none;
	width: var( --rsmomenu-logo-width, 185px );
	max-width: 100%;
	height: auto;
	max-height: none;
	object-fit: contain;
	object-position: center;
}

.rsmomenu-header:not( .rsmomenu-header--scrolled ) .rsmomenu-header__logo img.rsmomenu-header__logo-img--transparent {
	display: block;
	filter: drop-shadow( 2px 2px 4px rgba( 0, 0, 0, 0.4 ) );
}

.rsmomenu-header--scrolled .rsmomenu-header__logo img.rsmomenu-header__logo-img--solid {
	display: block;
}

.rsmomenu-header__logo-text {
	color: inherit;
	font-size: 20px;
	font-weight: 700;
	line-height: 1.4;
	letter-spacing: 1px;
}

/* -----------------------------------------------------------------------
 * Desktop menu
 * -------------------------------------------------------------------- */

.rsmomenu-header__nav {
	flex: 0 1 auto;
	min-width: 0;
}

.rsmomenu-menu {
	display: flex;
	flex-wrap: nowrap;
	align-items: center;
	justify-content: center;
	margin: 0;
	padding: 0;
	list-style: none;
}

.rsmomenu-menu--mobile {
	display: none;
}

.rsmomenu-menu--desktop > li {
	position: static;
}

.rsmomenu-menu-row {
	display: flex;
	align-items: center;
	gap: 2px;
}

.rsmomenu-menu--desktop > li > .rsmomenu-menu-row {
	position: relative;
	padding: 0 clamp( 10px, 2vw, 40px );
}

.rsmomenu-menu-link {
	display: inline-flex;
	align-items: center;
	color: inherit;
	text-decoration: none;
	white-space: nowrap;
	transition: opacity 0.2s ease;
}

.rsmomenu-menu-link:hover,
.rsmomenu-menu-link:focus {
	color: inherit;
	text-decoration: none;
	opacity: 0.75;
}

.rsmomenu-menu--desktop > li > .rsmomenu-menu-row > .rsmomenu-menu-link {
	font-size: var( --rsmomenu-font-size );
	font-weight: 500;
	letter-spacing: 0.05em;
	line-height: 24px;
	text-shadow: 2px 2px 4px rgba( 0, 0, 0, 0.7 );
}

.rsmomenu-header--scrolled .rsmomenu-menu--desktop > li > .rsmomenu-menu-row > .rsmomenu-menu-link {
	font-weight: 700;
	text-shadow: none;
}

/* Dividers, transparent state only. */

.rsmomenu-header:not( .rsmomenu-header--scrolled ) .rsmomenu-menu--desktop > li > .rsmomenu-menu-row::before,
.rsmomenu-header:not( .rsmomenu-header--scrolled ) .rsmomenu-menu--desktop > li:last-child > .rsmomenu-menu-row::after {
	content: "";
	position: absolute;
	top: 50%;
	width: 1px;
	height: 24px;
	background-color: var( --rsmomenu-divider );
	box-shadow: 2px 2px 4px rgba( 0, 0, 0, 0.7 );
	transform: translateY( -50% );
}

.rsmomenu-header:not( .rsmomenu-header--scrolled ) .rsmomenu-menu--desktop > li > .rsmomenu-menu-row::before {
	left: 0;
}

.rsmomenu-header:not( .rsmomenu-header--scrolled ) .rsmomenu-menu--desktop > li:last-child > .rsmomenu-menu-row::after {
	right: 0;
}

/* -----------------------------------------------------------------------
 * Arrow toggle
 * -------------------------------------------------------------------- */

.rsmomenu-arrow {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	flex: 0 0 auto;
	width: 20px;
	height: 20px;
	margin: 0;
	padding: 0;
	color: inherit;
	background: none;
	border: 0;
	cursor: pointer;
	transition: transform 0.25s ease;
}

.rsmomenu-arrow__icon {
	display: block;
}

/* Top-level desktop arrows point down. */
.rsmomenu-menu--desktop > li > .rsmomenu-menu-row > .rsmomenu-arrow {
	transform: rotate( 90deg );
	pointer-events: none;
}

/* -----------------------------------------------------------------------
 * Desktop dropdowns
 * -------------------------------------------------------------------- */

.rsmomenu-submenu {
	position: absolute;
	top: 100%;
	left: 0;
	z-index: 10;
	min-width: 195px;
	margin: 0;
	padding: 0;
	list-style: none;
	background-color: #ffffff;
	box-shadow: 0 4px 12px rgba( 0, 0, 0, 0.08 );
	opacity: 0;
	visibility: hidden;
	transform: translateY( 6px );
	transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s ease;
}

.rsmomenu-menu--desktop .rsmomenu-submenu .rsmomenu-submenu {
	top: 0;
	left: 100%;
}

/* Top-level dropdowns hang off the bottom of the header, not the menu item.
   The li is position:static so 100% resolves against .rsmomenu-header. The
   left offset is aligned to the menu item by JS. */
.rsmomenu-menu--desktop > li > .rsmomenu-submenu {
	top: 100%;
	left: var( --rsmomenu-drop-left, 0px );
}

.rsmomenu-menu--desktop > li.is-hover > .rsmomenu-submenu,
.rsmomenu-menu--desktop > li:focus-within > .rsmomenu-submenu,
.rsmomenu-menu--desktop .rsmomenu-submenu li:hover > .rsmomenu-submenu,
.rsmomenu-menu--desktop .rsmomenu-submenu li:focus-within > .rsmomenu-submenu {
	opacity: 1;
	visibility: visible;
	transform: none;
}

.rsmomenu-submenu > li {
	position: relative;
	border-bottom: 1px solid #d7d7d7;
}

.rsmomenu-submenu > li > .rsmomenu-menu-row {
	min-height: 50px;
	padding: 5px 11px;
	background-color: #ffffff;
}

.rsmomenu-submenu > li > .rsmomenu-menu-row > .rsmomenu-menu-link {
	color: #5f5f5f;
	font-family: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
	font-size: 16px;
	font-weight: 500;
	line-height: 30px;
	letter-spacing: 0.8px;
	text-shadow: none;
}

.rsmomenu-submenu > li > .rsmomenu-menu-row > .rsmomenu-arrow {
	color: #505050;
}

/* -----------------------------------------------------------------------
 * Hamburger
 * -------------------------------------------------------------------- */

.rsmomenu-header__toggle {
	display: none;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	gap: 5px;
	width: 32px;
	height: 32px;
	margin: 0;
	padding: 0;
	color: inherit;
	background: none;
	border: 0;
	cursor: pointer;
}

.rsmomenu-header__bar {
	display: block;
	width: 24px;
	height: 2px;
	background-color: currentColor;
	border-radius: 2px;
	transition: transform 0.25s ease, opacity 0.2s ease;
}

.rsmomenu-header:not( .rsmomenu-header--scrolled ) .rsmomenu-header__bar {
	box-shadow: 1px 1px 3px rgba( 0, 0, 0, 0.5 );
}

.rsmomenu-header.is-open .rsmomenu-header__bar:nth-child( 2 ) {
	transform: translateY( 7px ) rotate( 45deg );
}

.rsmomenu-header.is-open .rsmomenu-header__bar:nth-child( 3 ) {
	opacity: 0;
}

.rsmomenu-header.is-open .rsmomenu-header__bar:nth-child( 4 ) {
	transform: translateY( -7px ) rotate( -45deg );
}

/* -----------------------------------------------------------------------
 * Mobile panel
 * -------------------------------------------------------------------- */

.rsmomenu-header__mobile {
	display: none;
}

@media screen and ( max-width: 768px ) {

	.rsmomenu-header__inner,
	.rsmomenu-header--scrolled .rsmomenu-header__inner {
		flex-direction: row;
		align-items: center;
		justify-content: space-between;
		gap: 12px;
		min-height: var( --rsmomenu-mobile-height );
		height: var( --rsmomenu-mobile-height );
		padding: 0 20px;
	}

	.rsmomenu-header .rsmomenu-header__logo img.rsmomenu-header__logo-img {
		width: var( --rsmomenu-logo-width-mobile, 150px );
		height: auto;
		max-height: calc( var( --rsmomenu-mobile-height ) - 16px );
	}

	.rsmomenu-header__nav {
		display: none;
	}

	.rsmomenu-header__toggle {
		display: flex;
	}

	.rsmomenu-header__mobile {
		display: block;
		position: absolute;
		top: 100%;
		left: 0;
		right: 0;
		max-height: calc( 100vh - var( --rsmomenu-mobile-height ) );
		overflow-y: auto;
		background-color: #ffffff;
		box-shadow: 0 8px 16px rgba( 0, 0, 0, 0.08 );
		visibility: hidden;
		opacity: 0;
		transform: translateY( -8px );
		pointer-events: none;
		transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s ease;
	}

	.rsmomenu-header.is-open .rsmomenu-header__mobile {
		visibility: visible;
		opacity: 1;
		transform: none;
		pointer-events: auto;
	}

	.rsmomenu-menu--mobile {
		display: block;
		width: 100%;
	}

	.rsmomenu-menu--mobile li {
		position: static;
		width: 100%;
		border-bottom: 1px solid #d7d7d7;
	}

	.rsmomenu-menu--mobile .rsmomenu-menu-row {
		display: flex;
		align-items: center;
		justify-content: flex-start;
		gap: 2px;
		min-height: 50px;
		padding: 5px 20px;
	}

	.rsmomenu-menu--mobile .rsmomenu-menu-link {
		color: #5f5f5f;
		font-family: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
		font-size: 16px;
		font-weight: 500;
		line-height: 30px;
		letter-spacing: 0.8px;
		text-shadow: none;
		white-space: normal;
	}

	.rsmomenu-menu--mobile .rsmomenu-arrow {
		color: #505050;
		pointer-events: auto;
		transform: none;
	}

	.rsmomenu-menu--mobile li.is-open > .rsmomenu-menu-row > .rsmomenu-arrow {
		transform: rotate( 90deg );
	}

	.rsmomenu-menu--mobile .rsmomenu-submenu {
		display: none;
		position: static;
		min-width: 0;
		background-color: #fafafa;
		box-shadow: none;
		opacity: 1;
		visibility: visible;
		transform: none;
		transition: none;
	}

	.rsmomenu-menu--mobile li.is-open > .rsmomenu-submenu {
		display: block;
	}

	.rsmomenu-menu--mobile .rsmomenu-submenu > li:last-child {
		border-bottom: 0;
	}

	.rsmomenu-menu--mobile .rsmomenu-submenu .rsmomenu-menu-row {
		padding-left: 36px;
		background-color: transparent;
	}

	.rsmomenu-menu--mobile .rsmomenu-submenu .rsmomenu-submenu .rsmomenu-menu-row {
		padding-left: 52px;
	}

	.rsmomenu-menu--mobile .rsmomenu-submenu .rsmomenu-submenu .rsmomenu-submenu .rsmomenu-menu-row {
		padding-left: 68px;
	}
}

@media ( prefers-reduced-motion: reduce ) {

	.rsmomenu-header,
	.rsmomenu-header__inner,
	.rsmomenu-header__bar,
	.rsmomenu-arrow,
	.rsmomenu-submenu,
	.rsmomenu-header__mobile {
		transition: none;
	}
}