/* 页眉样式 */
header {
	background-color: var(--bg-color);
	color: var(--text-color);
	padding: 0.35rem 0.75rem;
	height: var(--header-height);
	max-height: var(--header-height);
	box-sizing: border-box;
	box-shadow: 0 1px 0 rgba(0, 0, 0, 0.06);
	position: fixed;
	top: 0;
	left: 0;
	right: 0;
	z-index: 1500; /* 高于遮罩与设置弹窗，保持始终可见 */
	overflow: visible; /* 允许下拉菜单正常显示；进度条已在底部不会影响布局 */
	min-height: var(--header-height);
}

header h1 {
	margin: 0;
	font-size: 1.1rem;
	display: flex;
	align-items: center;
	align-content: center;
	gap: 0.35rem;
	flex-wrap: nowrap;
	height: 100%;
}

.page-loading-indicator {
	display: inline-flex;
	width: 16px;
	height: 16px;
	margin-left: 6px;
	border-radius: 50%;
	border: 2px solid var(--border-color);
	border-top-color: var(--text-color);
	animation: header-spin 0.8s linear infinite;
	opacity: 0;
	visibility: hidden;
	transition: opacity 160ms ease, visibility 160ms ease;
}

body.page-loading .page-loading-indicator,
body.wallpaper-loading .page-loading-indicator {
	opacity: 1;
	visibility: visible;
}

@keyframes header-spin {
	from { transform: rotate(0deg); }
	to { transform: rotate(360deg); }
}

.header-title {
	display: inline-flex;
	align-items: center;
}

.header-title a {
	display: inline-flex;
	align-items: center;
	gap: 0.45rem;
	padding: 0.35rem 0.65rem;
	border-radius: 8px;
	transition: background 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease;
	outline: none;
}

.header-collapse-btn {
	margin-right: 0.35rem;
	flex-shrink: 0;
}

/* 窄屏时只显示 logo 图标，隐藏标题文字以腾出右侧空间 */
@media (max-width: 480px) {
	.header-title a {
		padding: 0.5rem; /* 收窄间距 */
		gap: 0;
	}
	.header-title .title-text {
		display: none;
	}
}

@media (max-width: 640px) {
	header {
		height: var(--header-height);
		max-height: var(--header-height);
		padding: 0.35rem 0.75rem;
	}
	header h1 {
		flex-wrap: nowrap;
		gap: 0.25rem;
	}
	.header-title .title-text {
		display: none;
	}
	.header-actions {
		flex-wrap: nowrap;
		gap: 0.35rem;
		width: auto;
		margin-left: auto;
		padding: 0;
	}
}

.header-title a:hover {
	color: var(--text-color);
	background: var(--hover-bg);
	box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.header-title a:focus {
	outline: none;
}

.header-title a:active {
	transform: scale(0.98);
	background: var(--active-bg);
	border-color: var(--border-color);
	box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.04) inset;
}

.header-actions {
	display: inline-flex;
	align-items: center;
	align-self: center;
	gap: 0.5rem;
	flex-wrap: nowrap;
	margin-left: auto; /* 将操作区推到右上角 */
}

header a {
	color: inherit;
	text-decoration: none;
}

/* 页眉 / logo 图标 */
header .logo {
	width: var(--header-logo-size);
	height: var(--header-logo-size);
	max-width: var(--header-logo-size);
	max-height: var(--header-logo-size);
	object-fit: contain;
	display: inline-block;
	user-select: none;
	-webkit-user-select: none;
	-webkit-user-drag: none;
}

/* 页眉头像防拖拽保存 */
header .header-avatar {
	user-select: none;
	-webkit-user-select: none;
	-webkit-user-drag: none;
	draggable: false;
}

/* 主题切换按钮 */
.theme-toggle-btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	width: var(--header-action-size);
	height: var(--header-action-size);
	min-width: var(--header-action-size);
	min-height: var(--header-action-size);
	padding: 0;
	margin: 0;
	background: var(--secondary-bg);
	border: 1px solid var(--border-color);
	border-radius: 10px;
	box-shadow: 0 1px 2px rgba(15, 23, 42, 0.08);
	cursor: pointer;
	font-size: 1.2rem;
	color: var(--text-color);
	transition: background 0.18s, border 0.18s, transform 0.18s;
}

/* 顶部搜索按钮，继承主题按钮风格 */
.header-search-btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	width: var(--header-action-size);
	height: var(--header-action-size);
	min-width: var(--header-action-size);
	min-height: var(--header-action-size);
	padding: 0;
	margin: 0;
	background: var(--secondary-bg);
	border: 1px solid var(--border-color);
	border-radius: 10px;
	box-shadow: 0 1px 2px rgba(15, 23, 42, 0.08);
	cursor: pointer;
	font-size: 1.1rem;
	color: var(--text-color);
	transition: background 0.18s, border 0.18s, transform 0.18s;
}

.header-search-btn i {
	display: flex;
	align-items: center;
	justify-content: center;
	line-height: 1;
}

.header-search-btn:hover {
	background: var(--hover-bg);
	border-color: var(--border-color);
}

.header-search-btn:active {
	transform: scale(0.95);
	background: var(--active-bg);
}

/* 搜索框浮层，样式对齐 lightbox 百分比输入 */
#header-search-overlay {
	position: fixed;
	top: calc(var(--header-height, 64px) + 8px);
	right: 24px;
	z-index: 1501;
	max-width: 480px;
	width: calc(100vw - 48px); /* 窄视图下限制宽度 */
	opacity: 0;
	visibility: hidden;
	pointer-events: none;
	transform: translateY(-8px);
	transition: opacity 200ms cubic-bezier(.2,.8,.2,1), transform 220ms cubic-bezier(.2,.8,.2,1), visibility 200ms cubic-bezier(.2,.8,.2,1);
	will-change: opacity, transform;
}

#header-search-overlay.show {
	opacity: 1;
	visibility: visible;
	pointer-events: auto;
	transform: translateY(0);
}

#header-search-overlay .search-box {
	display: inline-flex;
	align-items: center;
	gap: 8px;
	background: var(--card-bg);
	border: 1px solid var(--border-color);
	border-radius: 10px;
	padding: 8px 10px;
	box-shadow: 0 10px 30px var(--shadow-color);
	backdrop-filter: blur(6px);
	min-width: 240px; /* 体积与 lightbox 侧边指标相仿 */
	width: 100%;
	box-sizing: border-box;
}

/* 搜索结果列表 */
.search-results {
	margin-top: 8px;
	background: var(--card-bg);
	border: 1px solid var(--border-color);
	border-radius: 10px;
	box-shadow: 0 10px 30px var(--shadow-color);
	backdrop-filter: blur(6px);
	max-height: 400px;
	overflow-y: auto;
	padding: 4px;
	width: 100%;
	box-sizing: border-box;
}

.search-results.visible {
	opacity: 1;
	transform: translateY(0) scale(1);
}

@media (max-width: 760px) {
	#header-search-overlay {
		right: 12px;
		left: 12px;
		width: auto;
		max-width: none;
	}
	
	.search-results {
		max-height: 300px;
	}
}

.search-result-item {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 12px;
	padding: 8px 12px;
	margin: 4px 0;
	border-radius: 8px;
	cursor: pointer;
	transition: background 0.18s ease;
	line-height: 1.5;
}

.search-result-text {
	flex: 1;
	min-width: 0;
	overflow: hidden;
	text-overflow: ellipsis;
	white-space: nowrap;
}

.search-result-item:hover {
	background: var(--hover-bg);
}

.search-result-item:active {
	background: var(--active-bg);
}

.search-result-indicator {
	width: 28px;
	height: 28px;
	display: inline-flex;
	align-items: center;
	justify-content: center;
	border-radius: 50%;
	font-size: 0.75rem;
	font-weight: 600;
	color: var(--primary-color, #4A90E2);
	background: var(--card-bg);
	border: 1px solid var(--border-color);
	box-shadow: 0 0 0 rgba(0, 0, 0, 0);
	transition: transform 180ms ease, box-shadow 180ms ease;
	animation: search-result-indicator-pop 220ms cubic-bezier(.2,.8,.2,1);
}

.search-result-item.search-result-external .search-result-indicator {
	opacity: 0.92;
}

.search-result-item:hover .search-result-indicator {
	transform: translateX(2px) scale(1.05);
	box-shadow: 0 8px 18px rgba(0, 0, 0, 0.25);
}

@keyframes search-result-indicator-pop {
	0% {
		opacity: 0;
		transform: translateX(10px) scale(0.85);
	}
	100% {
		opacity: 1;
		transform: translateX(0) scale(1);
	}
}

.result-tag {
	display: inline-block;
 	padding: 2px 6px;
 	/* 使用主题色（默认蓝）作为文字颜色 */
 	color: var(--primary-color, #4A90E2);
 	border-radius: 4px;
 	font-size: 0.85rem;
 	font-weight: 500;
 	margin-right: 6px;
 	/* 背景使用 --primary-color-rgb (若未定义回退到蓝色透明) */
 	background: rgba(var(--primary-color-rgb, 74,144,226), 0.12);
}

.preview-context {
	color: var(--text-muted, #6b7280);
	font-size: 0.9rem;
}

.preview-match {
	color: var(--text-color);
	font-weight: 600;
	font-size: 0.9rem;
}

.search-no-results {
	padding: 16px;
	text-align: center;
	color: var(--text-muted, #6b7280);
	font-size: 0.9rem;
}

#header-search-overlay .search-input {
	flex: 1;
	min-width: 0;
}

#header-search-overlay .search-submit {
	min-width: 72px;
	height: 36px;
	padding: 0 12px;
	border-radius: 8px;
	border: 1px solid var(--border-color);
	background: var(--secondary-bg);
	color: var(--text-color);
	cursor: pointer;
	box-shadow: 0 1px 2px rgba(15, 23, 42, 0.12);
	transition: background 0.18s ease, border 0.18s ease, transform 0.18s ease;
}

#header-search-overlay .search-submit:hover {
	background: var(--hover-bg);
}

#header-search-overlay .search-submit:active {
	transform: scale(0.97);
	background: var(--active-bg);
}

/* 搜索高亮 */
@keyframes search-highlight-blink {
	0%, 100% {
		box-shadow: 0 0 0 3px var(--primary-color);
	}
	50% {
		box-shadow: 0 0 0 3px rgba(0,0,0,0.06);
	}
}

.search-highlight {
	box-shadow: 0 0 0 3px var(--primary-color);
	border-radius: 8px;
	animation: search-highlight-blink 0.6s ease-in-out 6 forwards; /* 闪烁 6 次 (3 秒) */
	transition: box-shadow 0.3s ease;
}

.theme-toggle-btn:hover {
	background: var(--hover-bg);
	border-color: var(--border-color);
}
.theme-toggle-btn:active {
	transform: scale(0.95);
	background: var(--active-bg);
}

/* 主题设置容器 */
.theme-settings-container {
	position: relative;
	display: inline-block;
	margin: 0;
}

.theme-settings-btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	width: var(--header-action-size);
	height: var(--header-action-size);
	min-width: var(--header-action-size);
	min-height: var(--header-action-size);
	padding: 0;
	margin: 0;
	background: var(--secondary-bg);
	border: 1px solid var(--border-color);
	border-radius: 10px;
	box-shadow: 0 1px 2px rgba(15, 23, 42, 0.08);
	cursor: pointer;
	font-size: 1.2rem;
	color: var(--text-color);
	transition: background 0.18s, border 0.18s, transform 0.18s;
}

.theme-settings-btn:hover {
	background: var(--hover-bg);
	border-color: var(--border-color);
}

.theme-settings-btn:active {
	transform: scale(0.95);
	background: var(--active-bg);
}

.theme-settings-menu {
	display: block;
	position: absolute;
	top: calc(100% + 12px);
	right: 0;
	background: var(--card-bg);
	border: 1px solid var(--border-color);
	border-radius: 8px;
	box-shadow: 0 8px 16px var(--shadow-color);
	min-width: 140px;
	z-index: 200;
	padding: 0.5rem 0;
	opacity: 0;
	transform: translateY(-8px) scale(0.98);
	pointer-events: none;
	transition: opacity 180ms cubic-bezier(.2,.8,.2,1), transform 200ms cubic-bezier(.2,.8,.2,1), visibility 200ms cubic-bezier(.2,.8,.2,1);
	will-change: opacity, transform;
	visibility: hidden;
}

.theme-settings-menu.active {
	opacity: 1;
	transform: translateY(0) scale(1);
	pointer-events: auto;
	visibility: visible;
}

/* 头部头像和菜单 */
#avatar-btn {
	cursor: pointer;
	transition: transform 0.2s ease;
	width: var(--header-action-size);
	height: var(--header-action-size);
	border-radius: 10px;
	object-fit: cover;
	display: inline-block;
	background: var(--secondary-bg);
	margin: 0 0.35rem;
}

#avatar-btn:hover {
	transform: scale(1.05);
}

#avatar-btn:active {
	transform: scale(0.95);
	background: var(--active-bg);
}

/* 页眉底部进度条（启用时显示） */
.header-progress {
	position: absolute;
	left: 0;
	right: 0;
	bottom: 0;
	height: 4px;
	background: linear-gradient(90deg, var(--primary-color) 0%, var(--primary-color) 100%);
	transform-origin: left center;
	transform: scaleX(0);
	transition: transform 120ms linear;
	border-radius: 999px; /* make ends rounded (pill shape) */
	pointer-events: none;
	z-index: 1110;
}

/* 容器用于进度背景（隐藏时仍保留高度） */
.header-progress-bg {
	position: absolute;
	left: 0;
	right: 0;
	bottom: 0;
	height: 4px;
	background: transparent;
	z-index: 1109;
}

.settings-option {
	display: flex;
	align-items: center;
	padding: 0.5rem 1rem;
	cursor: pointer;
	transition: background 0.15s ease, box-shadow 0.18s ease;
	user-select: none;
	margin: 0 0.5rem;
	border-radius: 8px;
}

.settings-option:hover {
	background: var(--hover-bg);
	box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.settings-option input[type="radio"] {
	margin-right: 0.5rem;
	cursor: pointer;
}

.settings-option span {
	color: var(--text-color);
	font-size: 0.95rem;
}

/* 可访问性：确保页眉/页脚内链接具有足够对比度 */
header a:focus,
footer a:focus {
	outline: 3px solid rgba(3,102,214,0.18);
	outline-offset: 2px;
}

/* 小屏幕：减少内边距 */
@media (max-width: 480px) {
	header, footer {
		padding-left: 0.75rem;
		padding-right: 0.75rem;
	}
}