/* ═══════════════════════════════════════════════════════════════════
           行程分類導航 - 滾動固定選單 (rn- prefix)
           共用樣式：all-itineraries / collection / destination
           各頁面特定的 padding / background 請在頁面 CSS 中覆寫
        ═══════════════════════════════════════════════════════════════════ */

#region-nav {
	position: relative;
	z-index: 100;
	padding: var(--space-lg) 0; /* 共用標準間距（以 collection 為主）*/
}

#region-nav.rn-sticky {
	position: fixed;
	top: 0;
	left: 0;
	right: 0;
	width: 100%;
	z-index: 1001;
	padding: 12px 0;
	background-color: var(--black-rich); /* 遮住 header */
}

/* 手機版 - 當 header 隱藏時，region-nav 置頂 */
@media (max-width: 991px) {
	#region-nav.rn-sticky {
		transition: top 0.3s ease;
		z-index: 1001;
	}
}

@media (max-width: 768px) {
	#region-nav {
		padding: var(--space-md) 0;
	}
}

.rn-wrapper {
	max-width: 1400px;
	margin: 0 auto;
	padding: 0 var(--space-md);
}

.rn-main {
	position: relative;
	background: rgba(10, 10, 10, 0.95);
	backdrop-filter: blur(10px);
	border: 1px solid var(--gold-primary);
	border-radius: var(--radius-lg);
	padding: 12px;
	box-shadow:
		0 4px 20px rgba(0, 0, 0, 0.5),
		0 0 0 1px var(--gold-primary),
		0 0 20px rgba(201, 169, 98, 0.25);
	z-index: 1000;
	display: flex;
	align-items: center;
	gap: 12px;
}

/* 左右箭頭按鈕 */
.rn-arrow-btn {
	flex-shrink: 0;
	width: 50px;
	height: 50px;
	border-radius: 6px;
	background: transparent;
	border: none;
	color: var(--gold-primary);
	cursor: pointer;
	display: flex;
	align-items: center;
	justify-content: center;
	font-size: 1.1rem;
	transition: all 0.2s ease;
	opacity: 0;
	visibility: hidden;
	pointer-events: none;
}

.rn-arrow-btn:hover:not(:disabled) {
	background: rgba(201, 169, 98, 0.15);
	color: var(--white);
}

.rn-arrow-btn:disabled {
	opacity: 0.3;
	cursor: not-allowed;
}

/* 當按鈕超過容器寬度時顯示箭頭 */
.rn-main.rn-has-overflow .rn-arrow-btn {
	opacity: 1;
	visibility: visible;
	pointer-events: auto;
}

.rn-buttons-container {
	flex: 1;
	overflow: hidden;
	position: relative;
}

.rn-buttons {
	display: flex;
	gap: 12px;
	overflow-x: auto;
	overflow-y: hidden;
	scroll-behavior: smooth;
	-webkit-overflow-scrolling: touch;
	width: 100%;
}

.rn-buttons.rn-dragging {
	user-select: none;
	-webkit-user-select: none;
}

.rn-buttons::-webkit-scrollbar {
	display: none;
}

.rn-btn {
	flex: 0 0 calc((100% - 36px) / 4);
	width: calc((100% - 36px) / 4);
	min-width: calc((100% - 36px) / 4);
	text-align: center;
	padding: 16px 20px;
	background: var(--gray-900);
	border: 1px solid var(--gray-600);
	border-radius: var(--radius-md);
	color: var(--gray-300);
	font-size: 0.95rem;
	font-weight: 600;
	cursor: pointer;
	transition: all var(--duration-fast) var(--ease-luxury);
	min-height: 54px;
	display: flex;
	align-items: center;
	justify-content: center;
	position: relative;
	z-index: 10;
	font-family: inherit;
	outline: none;
	-webkit-appearance: none;
	appearance: none;
	white-space: nowrap;
	flex-shrink: 0;
	text-decoration: none;
}

.rn-btn:hover {
	border-color: var(--gold-primary);
	color: var(--gold-primary);
}

.rn-btn.rn-active {
	background: linear-gradient(135deg, var(--gold-primary), var(--gold-dark));
	border: 1px solid var(--gold-primary);
	color: var(--black-pure);
	box-shadow: 0 0 30px rgba(201, 169, 98, 0.3);
}

.rn-btn.rn-active:hover {
	opacity: 0.9;
}

/* ─── 多國模式 - 國家分頁 tabs ─── */
.rn-country-tabs {
	display: flex;
	gap: 8px;
	padding: 8px 24px 0;
	border-bottom: 1px solid #e5e7eb;
	background: #fff;
	overflow-x: auto;
	scrollbar-width: none;
}

.rn-country-tabs::-webkit-scrollbar {
	display: none;
}

.rn-country-tab {
	flex-shrink: 0;
	padding: 8px 20px;
	border: none;
	background: transparent;
	font-size: 0.9rem;
	font-weight: 500;
	color: #6b7280;
	cursor: pointer;
	border-bottom: 2px solid transparent;
	margin-bottom: -1px;
	transition: color 0.2s, border-color 0.2s;
}

.rn-country-tab:hover {
	color: #111827;
}

.rn-country-tab.active {
	color: #111827;
	border-bottom-color: var(--gold-primary, #c9a962);
	font-weight: 600;
}

/* 多 panel 時，非 active 的 panel 隱藏 */
.rn-country-panel {
	display: none;
}

.rn-country-panel.active {
	display: block;
}

/* 單國模式：只有一個 panel 時永遠顯示 */
.rn-country-panel:only-child {
	display: block;
}

/* ─── 手機版響應式 (max-width: 768px) ─── */
@media (max-width: 768px) {
	.rn-wrapper {
		padding: 0 12px;
	}

	.rn-main {
		background: transparent;
		border: none;
		box-shadow: none;
		padding: 0;
		gap: 8px;
	}

	.rn-arrow-btn {
		width: 32px;
		height: 32px;
		flex-shrink: 0;
		min-width: 32px;
	}

	.rn-buttons-container {
		flex: 1;
		overflow: hidden;
	}

	.rn-buttons {
		gap: 8px;
		overflow-x: auto;
		overflow-y: hidden;
		-webkit-overflow-scrolling: touch;
		scrollbar-width: none;
		-ms-overflow-style: none;
		justify-content: flex-start;
	}

	.rn-buttons::-webkit-scrollbar {
		display: none;
	}

	/* 依文字長度自適應寬度，不使用固定寬度 */
	.rn-btn {
		flex: 0 0 auto;
		width: auto;
		min-width: unset;
		font-size: 0.85rem;
		padding: 12px 20px;
		white-space: nowrap;
	}
}