* {
	margin: 0;
	padding: 0;
	box-sizing: border-box;
	-webkit-tap-highlight-color: transparent;
	-webkit-touch-callout: none;
	-webkit-user-select: none;
	user-select: none;
}

:root {
	--primary-color: #00AEEF;
	--secondary-color: rgba(0, 174, 239, 0.8);
	--checkbox-size: 20px;
	--checkbox-border: 2px;
	--checkbox-radius: 4px;
}

body {
	font-family: 'Times New Roman', 'SimSun', serif;
	width: 100vw;
	height: 100vh;
	background-attachment: fixed;
	background-color: #f0f0f0;
	position: relative;
	overflow: hidden;
	cursor: pointer;
	-webkit-user-select: none;
	user-select: none;
	-webkit-font-smoothing: antialiased;
	-webkit-text-size-adjust: 100%;
}

/* 背景容器 */
#bg-container {
	position: fixed;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	z-index: -1;
	background-size: cover;
	background-position: center center;
	background-color: #f0f0f0;
}

/* 当前壁纸层 */
#current-bg {
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	background-size: cover;
	background-position: center center;
	opacity: 1;
}

/* 新壁纸层 */
#new-bg {
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	background-size: cover;
	background-position: center center;
	opacity: 0;
}

/* 通用淡入动画 */
@keyframes fadeIn {
	from { opacity: 0; }
	to { opacity: 1; }
}

@keyframes cardFadeIn {
	from { opacity: 0; transform: scale(0.95); }
	to { opacity: 1; transform: scale(1); }
}

.fade-in {
	animation: fadeIn 0.2s ease-out;
}

.card-fade-in {
	animation: cardFadeIn 0.2s ease-out;
}

/* 单词卡片 */
#card-container {
	position: absolute;
	top: 50%;
	left: 50%;
	transform: translate(-50%, -50%);
	width: 85%;
	max-width: 700px;
	height: 60vh;
	display: flex;
	justify-content: center;
	align-items: center;
}

#card {
	width: 100%;
	padding: 40px;
	border-radius: 20px;
	background: rgba(255, 255, 255, 0.75);
	backdrop-filter: blur(2px);
	-webkit-backdrop-filter: blur(2px);
	border:  none;
	box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1), 0 0 0 1px var(--third-color) inset;
	text-align: center;
}

#word {
	font-size: 4.5rem;
	font-weight: 700;
	color: var(--primary-color);
	line-height: 1.1;
	margin: 30px;
	text-shadow: 2px 2px 4px var(--third-color);
	transition: color 0.3s ease;
	word-break: break-word;
	overflow-wrap: break-word;
}

#meaning {
	color: var(--primary-color);
	font-size: 2.2rem;
	line-height: 1.4;
	padding: 20px;
	border-radius: 10px;
	transition: color 0.3s ease;
	word-break: break-word;
	overflow-wrap: break-word;
	white-space: pre-wrap;
}

/* 设置按钮 */
#settings-btn {
	position: fixed;
	bottom: 20px;
	right: 20px;
	width: 50px;
	height: 50px;
	border-radius: 50%;
	background: rgba(255, 255, 255, 0.75);
	backdrop-filter: blur(2px);
	-webkit-backdrop-filter: blur(2px);
	border: 1px solid rgba(255, 255, 255, 0.3);
	box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
	cursor: pointer;
	display: flex;
	align-items: center;
	justify-content: center;
	z-index: 1000;
	transition: all 0.3s ease;
}

#settings-btn:hover {
	transform: rotate(90deg);
	box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

#settings-btn img {
	width: 24px;
	height: 24px;
	transition: transform 0.3s ease;
}

/* 设置菜单 */
#settings-menu {
	position: fixed;
	bottom: 80px;
	right: 20px;
	width: 300px;
	background: rgba(255, 255, 255, 0.75);
	backdrop-filter: blur(2px);
	-webkit-backdrop-filter: blur(2px);
	border-radius: 15px;
	padding: 20px;
	box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
	border: 1px solid rgba(255, 255, 255, 0.3);
	display: none;
	z-index: 999;
	opacity: 0;
	transform: translateY(20px);
	transition: opacity 0.3s ease, transform 0.3s ease;
}

#settings-menu.show {
	display: block;
	opacity: 1;
	transform: translateY(0);
}

/* 自定义下拉菜单 */
.custom-dropdown {
	position: relative;
	width: 100%;
	margin-top: 15px;
}

.dropdown-trigger {
	width: 100%;
	padding: 10px 12px;
	border-radius: 5px;
	cursor: pointer;
	color: var(--primary-color);
	font-size: 0.95rem;
	transition: all 0.3s ease;
	user-select: none;
}

.dropdown-trigger:hover {
	border-color: var(--primary-color);
	background: rgba(255, 255, 255, 0.7);
	box-shadow: 0 2px 8px var(--primary-color);
}

.dropdown-menu {
	position: absolute;
	top: 100%;
	left: 0;
	right: 0;
	background: rgba(255, 255, 255, 0.8);
	border-top: none;
	border-radius: 0 0 5px 5px;
	max-height: 50vh;
	overflow-y: auto;
	z-index: 1001;
	display: none;
	box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
	margin-top: -1px;
}

.dropdown-menu.show {
	display: block;
}

.dropdown-option {
	display: flex;
	align-items: center;
	gap: 12px;
	padding: 12px 12px;
	cursor: pointer;
	transition: all 0.2s ease;
	border-bottom: 1px solid rgba(0, 0, 0, 0.05);
	color: var(--primary-color);
	font-size: 0.95rem;
}

.dropdown-option:last-child {
	border-bottom: none;
}

.dropdown-option:hover {
	background: var(--third-color);
	color: var(--primary-color);
	font-weight: 500;
}

.dropdown-option .option-icon {
	width: 28px;
	height: 28px;
	object-fit: contain;
	flex-shrink: 0;
}

.dropdown-option .option-text {
	flex: 1;
	font-size: 0.95rem;
	color: var(--primary-color);
}

/* 下拉菜单分割线 */
.dropdown-divider {
    height: 1px;
    background-color: var(--secondary-color);
    margin: 5px 0;
    border: none;
}

.setting-group {
	margin-bottom: 20px;
}

.setting-group:last-child {
	margin-bottom: 0;
}

.setting-group h3 {
	color: var(--primary-color);
	font-size: 1.1rem;
	margin-bottom: 10px;
	padding-bottom: 5px;
	border-bottom: 1px solid rgba(0, 0, 0, 0.1);
	transition: color 0.3s ease;
}

.setting-option {
	display: flex;
	align-items: center;
	justify-content: space-between;
	margin-bottom: 8px;
}

.setting-option label {
	color: var(--primary-color);
	font-size: 0.95rem;
	cursor: pointer;
}

.checkbox-group {
	display: flex;
	flex-direction: column;
	gap: 8px;
	margin-bottom: 15px;
}

/* 复选框选项 - 现在使用label标签 */
.checkbox-option {
	display: flex;
	align-items: center;
	gap: 8px;
	cursor: pointer;
	color: var(--primary-color);
	font-size: 0.95rem;
	user-select: none;
	padding: 4px 0;
}

/* 隐藏默认复选框 */
.checkbox-option input[type="checkbox"] {
	position: absolute;
	opacity: 0;
	width: 0;
	height: 0;
	margin: 0;
	pointer-events: none;
}

/* 自定义复选框容器 */
.checkbox-option .custom-checkbox {
	position: relative;
	width: var(--checkbox-size);
	height: var(--checkbox-size);
	min-width: var(--checkbox-size);
	min-height: var(--checkbox-size);
	border: var(--checkbox-border) solid var(--primary-color);
	border-radius: var(--checkbox-radius);
	background: rgba(255, 255, 255, 0);
	transition: all 0.2s ease;
	display: flex;
	align-items: center;
	justify-content: center;
}

/* 复选框悬停效果 */
.checkbox-option:hover .custom-checkbox {
	border-color: var(--primary-color);
	background: var(--third-color);
	box-shadow: 0 0 0 3px var(--third-color);
}

/* 复选框选中状态 */
.checkbox-option input[type="checkbox"]:checked + .custom-checkbox {
	background-color: var(--primary-color);
	border-color: var(--primary-color);
}

/* 复选框选中时的对勾 */
.checkbox-option input[type="checkbox"]:checked + .custom-checkbox::after {
	content: '';
	position: absolute;
	width: 10px;
	height: 6px;
	border-left: 2px solid white;
	border-bottom: 2px solid white;
	transform: rotate(-45deg) translate(1px, -1px);
}

/* 禁用状态 */
.checkbox-option input[type="checkbox"]:disabled + .custom-checkbox {
	opacity: 0.5;
	cursor: not-allowed;
	border-color: var(--secondary-color);
	background: var(--third-color);
}

.checkbox-option input[type="checkbox"]:disabled:checked + .custom-checkbox {
	background-color:var(--third-color);
	border-color:var(--secondary-color);
}

/* 复选框标签文本 */
.checkbox-option .checkbox-label {
	color: var(--primary-color);
	font-size: 0.95rem;
	cursor: pointer;
	line-height: 1.4;
	margin-left: 5px;
}

.file-input-wrapper {
	position: relative;
	display: block;
	margin-bottom: 15px;
	margin-top: 12px;
}

.file-input-wrapper input[type="file"] {
	opacity: 0;
	width: 100%;
	height: 100%;
	cursor: pointer;
}


/* 统一的按钮样式 */
.btn-primary {
	display: block;
	padding: 10px 16px;
	background: var(--primary-color);
	color: white;
	border: none;
	border-radius: 5px;
	cursor: pointer;
	font-family: 'Times New Roman', 'HanYiShuSongErJian', serif;
	font-size: 0.9rem;
	transition: all 0.3s ease;
	text-align: center;
	text-decoration: none;
	width: 100%;
	font-weight: 500;
	box-shadow: 0 2px 4px var(--third-color);
}

.btn-primary:hover {
	background: var(--secondary-color);
	box-shadow: 0 4px 8px var(--third-color);
}

.btn-primary:disabled {
	background: #cccccc;
	cursor: not-allowed;
	box-shadow: none;
	transform: none;
}



.footer-links {
	display: flex;
	justify-content: center;
	gap: 20px;
	padding-top: 10px;
}

.footer-link {
	width: auto;
	color: var(--secondary-color);
	padding: 0;
}

.footer-link:hover {
	color: var(--primary-color);
}


/* Interval输入框专用样式 */
.interval-input {
	border: none;
	border-radius: 3px;
	height: 30px;
	width: 50px;
	padding: 2px;
	text-align: center;
	color: var(--primary-color);
	border-radius: 3px;
	background: rgba(255, 255, 255, 0);
	transition: border-color 0.2s ease;
	font-family: 'Times New Roman', Times, serif;
	font-size: 1.2rem;
}

.interval-input:focus {
	outline: none;
}

/* 响应式设计 */
@media (max-width: 768px) {
	:root {
		--checkbox-size: 18px;
	}
	
	#card-container {
		width: 90%;
		max-width: 600px;
		height: 50vh;
	}
	
	#card {
		padding: 30px 20px;
	}
	
	#word {
		font-size: 3.5rem;
		margin-bottom: 20px;
	}
	
	#meaning {
		font-size: 1.8rem;
		padding: 15px;
	}
	
	#settings-btn {
		width: 45px;
		height: 45px;
		bottom: 15px;
		right: 15px;
	}
	
	#settings-menu {
		width: 280px;
		right: 10px;
		bottom: 65px;
		max-height: 70vh;
		overflow-y: auto;
	}
}

@media (max-width: 480px) {
	:root {
		--checkbox-size: 16px;
	}
	
	html {
		font-size: 14px;
	}
	
	#card-container {
		width: 95%;
		max-width: 100%;
		height: 45vh;
	}
	
	#card {
		padding: 20px 12px;
		border-radius: 15px;
	}
	
	#word {
		font-size: 2.5rem;
		margin-bottom: 15px;
	}
	
	#meaning {
		font-size: 1.2rem;
		padding: 10px;
		line-height: 1.3;
	}
	
	#settings-btn {
		width: 40px;
		height: 40px;
		bottom: 10px;
		right: 10px;
	}
	
	#settings-btn img {
		width: 20px;
		height: 20px;
	}
	
	#settings-menu {
		width: calc(100% - 20px);
		right: 10px;
		bottom: 55px;
		max-height: 65vh;
		overflow-y: auto;
		max-width: 100%;
	}
	
	.setting-group {
		margin-bottom: 15px;
	}
	
	.setting-group h3 {
		font-size: 0.95rem;
		margin-bottom: 8px;
	}
	
	.checkbox-option .checkbox-label {
		font-size: 0.85rem;
	}
	
	.file-input-label,
	.action-btn {
		padding: 8px 12px;
		font-size: 0.85rem;
	}
	
	.footer-links {
		gap: 15px;
		font-size: 0.8rem;
	}
	
	.footer-link {
		font-size: 0.8rem;
	}
	
	/* 触摸友好的按钮大小 */
	input[type="checkbox"],
	input[type="number"],
	select {
		min-height: 40px;
		padding: 8px;
	}
}

@media (max-width: 360px) {
	#card {
		padding: 15px 10px;
	}
	
	#word {
		font-size: 2rem;
		margin-bottom: 10px;
	}
	
	#meaning {
		font-size: 1rem;
		padding: 8px;
	}
	
	#settings-menu {
		width: calc(100% - 16px);
		right: 8px;
		bottom: 50px;
	}
}