style.css

:root {
	--background-color: #f0f8ff;
	--text-color: #333333;
	--header-background-color: #4682b4;
	--header-text-color: #ffffff;
	--header-border-color: #5f9ea0;
	--box-background-color: #ffffff;
	--box-border-color: #b0c4de;
	--hover-background-color: #e6f2ff;
	--error-color: #e53935;
	--tooltip-background-color: rgba(50, 50, 50, 0.9);
	--tooltip-text-color: #ffffff;
}

body.dark-mode {
	--background-color: #1a1a1a;
	--text-color: #e0e0e0;
	--header-background-color: #2f4f4f;
	--header-text-color: #ffffff;
	--header-border-color: #4f4f4f;
	--box-background-color: #2a2a2a;
	--box-border-color: #444444;
	--hover-background-color: #333333;
	--error-color: #ef5350;
	--tooltip-background-color: rgba(230, 230, 230, 0.9);
	--tooltip-text-color: #1a1a1a;
}

body {
	font-family: Arial, sans-serif;
	margin: 0;
	padding: 0;
	background-color: var(--background-color);
	color: var(--text-color);
}

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

.container {
	max-width: 800px;
	margin: 0 auto;
	padding: 20px;
}

h1,
h2 {
	margin: 20px 0;
	text-align: center;
}

p {
	margin: 0;
	text-align: center;
}

.header {
	background-color: var(--header-background-color);
	color: var(--header-text-color);
	border-bottom: 2px solid var(--header-border-color);
}

.header-content {
	max-width: 800px;
	margin: 0 auto;
	padding: 10px 20px;
	display: flex;
	align-items: center;
	justify-content: center;
	position: relative;
}

.home-link {
	position: absolute;
	left: 20px;
	display: flex;
	align-items: center;
}

.home-icon {
	width: 28px;
	height: 28px;
}

.tool-name {
	font-size: 24px;
	font-weight: bold;
	margin: 0;
}

.theme-toggle {
	position: absolute;
	right: 20px;
	background-color: var(--box-background-color);
	color: var(--text-color);
	border: 1px solid var(--box-border-color);
	border-radius: 4px;
	padding: 5px 10px;
	cursor: pointer;
}

.theme-toggle:hover {
	background-color: var(--hover-background-color);
}

.tool-menu {
	display: flex;
	flex-wrap: wrap;
	justify-content: center;
	margin-top: 40px;
}

.tool-card {
	background-color: var(--box-background-color);
	border: 2px solid var(--box-border-color);
	border-radius: 8px;
	padding: 20px;
	margin: 10px;
	text-align: center;
	text-decoration: none;
	color: var(--text-color);
	width: calc(50% - 40px);
	box-sizing: border-box;
}

.tool-card:hover {
	background-color: var(--hover-background-color);
}

body,
.box,
.theme-toggle,
.tool-card {
	transition: none;
}