:root {
	--input_padding: 0.5rem 0.75rem;
	--border_radius_s: 3px;
	--border_radius_m: 5px;
	--border_radius_l: 7.5px;
}

article.main {
	max-width: 52.5rem;
	margin: auto;
}

main section {
	margin: 1.25rem auto;
	padding: 1.25rem;
	background-color: var(--sec_color);
	box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
	border-radius: 7.5px;
}

main section:first-child {
	margin-top: 0;
}

main section:last-child {
	margin-bottom: 0;
}

main section#toc ul {
	column-count: 2;
}

main section.sakuhin-thumbnail {
	padding: 0;
	overflow: hidden;
}

main section.sakuhin-thumbnail>img {
	display: block;
	max-width: 100%;
}

div.flex {
	display: -webkit-flex;
	display: flex;
	-webkit-justify-content: space-between;
	justify-content: space-between;
	flex-wrap: wrap;
	gap: 10px;
}

/* --- Tab UI Styles --- */

/* Tab Container */
.tabs {
	display: flex;
	border-bottom: 1px solid var(--grey_1);
	margin-bottom: 1.25rem;
	overflow-x: auto; /* For mobile scrollability */
}

/* Individual Tab */
.tab-link {
	padding: 0.75rem 1.25rem;
	cursor: pointer;
	text-decoration: none;
	color: var(--text_colour);
	border: 1px solid transparent;
	border-radius: 0.25em 0.25em 0 0;
	border-bottom: none;
	background-color: transparent;
	transition: background-color 0.3s, color 0.3s;
	flex-grow: 1; /* Tabs grow to fill space */
	text-align: center;
}

.tab-link:hover {
	background-color: var(--grey_3) !important;
	color: var(--theme_colour);
}

/* Active Tab */
.tab-link.active {
	border-color: var(--grey_1) var(--grey_1) var(--sec_color) var(--grey_1);
	background-color: var(--sec_color);
	color: var(--theme_colour);
	font-weight: 500;
}

/* Tab Content */
.tab-content {
	padding: 0.5rem 0;
}

/* Hide inactive content */
.tab-content:not(.active) {
	display: none;
}

/* --- Input UI Styles --- */

/* Basic Input and Textarea Styling */

/* Focus State */


/* Button Styling (Submit/General) */
button, input[type="submit"], a.button {
	display: inline-block;
	padding: var(--input_padding);
	border: none;
	border-radius: var(--border_radius_s);
	cursor: pointer;
	font-size: 80%;
	font-family: inherit;
	font-weight: bold;
	text-align: center;
	color: var(--sec_color); /* White text on theme color */
	background-color: var(--theme_colour);
	transition: background-color 0.3s, opacity 0.3s;
}

button:hover, input[type="submit"]:hover, a.button:hover  {
	background-color: color-mix(in srgb, var(--theme_colour) 80%, #000); /* Slightly darker on hover */
}

/* Disabled State */
button:disabled, input[type="submit"]:disabled, a.button:disabled  {
	opacity: 0.6;
	cursor: not-allowed;
	background-color: var(--grey_2);
	color: var(--grey_1);
}

input, textarea, select {
	font-size: 0.875em;
	font-family: inherit;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
textarea,
select {
	box-sizing: border-box;
	padding: 0 0.5em;
	border: 1px solid var(--grey_1);
	border-radius: 5px;
	height: 2em;
	background-color: #fff;
	box-shadow: 0 0 2.5px rgba(0, 0, 0, 0.05);
	color: var(--text_colour);
	background-color: var(--sec_color);
	transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
input[type="number"]:focus,
textarea:focus {
	border-color: var(--theme_colour);
	outline: none;
	box-shadow: 0 0 5px rgba(223, 0, 0, 0.5);
}

input::placeholder {
	color: var(--grey_1);
}

input {
	margin-left: auto;
	padding: 6px 10px;
	border: 1px solid var(--grey_1);
	border-radius: 5px;
}

select:focus,
input:focus {
	border-color: var(--theme_colour);
	box-shadow: 0 0 5px var(--theme_colour);
	outline: none;
}

input {
	flex: 1;
	min-width: 200px;
}

/* Accordion */
.accordion section {
	padding: 0.5rem 1rem;
}

.accordion-btn {
	font-size: 1rem;
	align-items: center;
	border: none;
	cursor: pointer;
	position: relative;
	text-align: left;
	padding: 0.5em 1.5em 0.5em 2px;
}

.accordion-btn:hover::after {
	background-color: var(--theme_colour);
}

.accordion-btn::after {
	content: '';
	mask: url(../img/icon/right.svg);
	mask-repeat: no-repeat;
	mask-position: center;
	position: absolute;
	background-color: var(--text_colour);
	right: 0;
	top: 0.75em;
	bottom: auto;
	width: 20px;
	height: 1.5em;
	background-size: 1em;
	transition: .25s cubic-bezier(0.45, 0.05, 0.55, 0.95);
}

.accordion-btn.open::after {
	transform: rotate(90deg);
	background-color: var(--theme_colour);
}

.accordion-btn div {
	padding: 0;
	display: inline-table;
	font-size: 1.25em;
	margin: 0;
	line-height: initial;
}

.panel {
	max-height: 0;
	overflow: hidden;
	transition: max-height 0.3s ease-out;
	background-color: #fff;
}

.table-container {
	overflow-x: auto;
	-webkit-overflow-scrolling: touch;
}

.line-dot {
	padding: 0;
	display: inline-table;
	font-size: 1.25em;
	font-weight: 600;
	margin: 0;
	line-height: initial;
}

.line-dot svg,
.line-dot img {
	height: 1.5em;
	width: 1.5em;
	vertical-align: top;
}

.line-dot span {
	vertical-align: bottom;
	line-height: 1.5em;
	color: var(--line_colour);
}

.line-dot span:not(:last-child)::after {
	content: "";
	width: 0.125em;
	height: 1.125em;
	background-color: var(--grey_1);
	background-color: rgba(from var(--line_colour) r g b / 0.625);
	margin: 0 0.325em;
	display: inline-block;
	vertical-align: -3.25px;
}


@media (max-width: 860px) {
	main section {
		margin: 0.75rem auto;
		max-width: 100%;
	}

	main > *:first-child {
		margin-top: 0;
	}

	div.sakuhin-thumbnail img {
		max-width: 100%;
	}
}

@media (min-width: 480px) {
	.line-dot svg,
	.line-dot img {
		margin-right: 0.5em;
	}
}

@media (max-width: 480px) {
	:root {
		--rem: 24px;
	}

	main section#toc ul {
		column-count: 1;
	}
	
	/* Adjustments for mobile tabs */
	.tabs {
		flex-wrap: nowrap; /* Prevent tabs from wrapping, allow horizontal scroll */
	}
	
	.tab-link {
		flex-shrink: 0; /* Tabs won't shrink below content */
	}

	.accordion section {
		padding: 0.125rem 0.25rem;
	}

	.accordion-btn {
		padding: 0.5rem 0.5rem 0.5rem 0.25rem;
	}

	.accordion-btn::after {
		top: 0.75em;
		right: 7.5px;
	}

	.line-dot svg,
	.line-dot img {
		font-size: 1.75rem;
		float: left;
	}

	.line-dot span {
		display: block;
		margin-left: 3rem;
		margin-right: 20px;
	}

	.line-dot span:first-of-type:last-of-type {
		font-size: 1.5rem;
		line-height: 2.625rem;
	}

	.line-dot.cjk-latn span:nth-of-type(1) {
		font-size: 1.5rem;
		line-height: 1.75rem;
	}

	.line-dot.cjk-latn span:nth-of-type(2) {
		font-size: 0.875rem;
		line-height: 0.875rem;
	}

	.line-dot.cjk-latn span:nth-of-type(1)::after,
	.line-dot.cjk-latn span:nth-of-type(2)::after {
		content: none !important;;
	}

	.line-dot.cjk-latn span:nth-of-type(n+3) {
		display: none;
	}
}