/*
 * site.css - public shell for every page.
 *
 * Mobile-first. Sizes are in rem so a 200% zoom or a large default font reflows instead
 * of clipping. No background image is referenced, no icon font is loaded, no vector
 * asset is used; the small-screen menu uses native details/summary disclosure.
 */

:root {
	--tta-ink: #14231F;
	--tta-mint: #DCEFE8;
	--tta-warm: #F7F5EF;
	--tta-ivory: #FFFDF7;
	--tta-tea: #5B4033;
	--tta-gold: #B2965B;
	--tta-text: #17231F;

	--tta-sans: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", "Hiragino Sans", system-ui, sans-serif;
	--tta-serif: "Noto Serif TC", "Songti TC", "PMingLiU", Georgia, serif;

	--tta-measure: 46rem;
	--tta-wide: 72rem;
	--tta-bar: 3.5rem;
}

*,
*::before,
*::after {
	box-sizing: border-box;
}

html {
	-webkit-text-size-adjust: 100%;
}

body {
	margin: 0;
	background: var(--tta-ivory);
	color: var(--tta-text);
	font-family: var(--tta-sans);
	font-size: 1rem;
	line-height: 1.8;
	overflow-x: hidden;
}

img,
picture {
	max-width: 100%;
	height: auto;
	display: block;
}

a {
	color: var(--tta-tea);
	text-underline-offset: 0.2em;
}

a:hover,
a:focus {
	color: var(--tta-ink);
}

:focus-visible {
	outline: 3px solid var(--tta-gold);
	outline-offset: 2px;
}

h1,
h2,
h3 {
	font-family: var(--tta-serif);
	line-height: 1.4;
	color: var(--tta-ink);
	margin: 0 0 0.6em;
	overflow-wrap: break-word;
}

h1 {
	font-size: clamp(1.6rem, 5vw, 2.4rem);
}

h2 {
	font-size: clamp(1.3rem, 4vw, 1.75rem);
}

h3 {
	font-size: clamp(1.1rem, 3.4vw, 1.3rem);
}

p,
li {
	overflow-wrap: break-word;
}

p {
	margin: 0 0 1.1em;
	max-width: var(--tta-measure);
}

ul,
ol {
	padding-inline-start: 1.25rem;
}

/* --- skip link --- */

.tta-skip {
	position: absolute;
	left: -100vw;
	top: 0;
	z-index: 60;
	padding: 0.6rem 1rem;
	background: var(--tta-ink);
	color: var(--tta-ivory);
}

.tta-skip:focus {
	left: 0.5rem;
	top: 0.5rem;
}

/* --- header --- */

.tta-header {
	position: relative;
	z-index: 40;
	background: var(--tta-ink);
	color: var(--tta-ivory);
}

.tta-header-inner {
	display: grid;
	grid-template-columns: 1fr auto;
	align-items: center;
	gap: 0.75rem 1rem;
	max-width: var(--tta-wide);
	margin: 0 auto;
	padding: 0.75rem 1rem;
}

.tta-brand {
	margin: 0;
	max-width: none;
}

.tta-brand a {
	color: inherit;
	text-decoration: none;
	display: block;
}

.tta-brand-name {
	display: block;
	font-family: var(--tta-serif);
	font-size: 1.05rem;
	letter-spacing: 0.02em;
}

.tta-brand-descriptor {
	display: block;
	font-size: 0.8125rem;
	color: var(--tta-mint);
}

/* Native small-screen disclosure. The adjacent nav stays outside the closed details
 * element so desktop links remain keyboard reachable when CSS forces the nav visible. */

.tta-menu {
	justify-self: end;
}

.tta-menu-summary {
	display: inline-flex;
	align-items: center;
	padding: 0.45rem 0.7rem;
	border: 1px solid var(--tta-mint);
	border-radius: 0.25rem;
	color: var(--tta-ivory);
	font-size: 0.9375rem;
	cursor: pointer;
	list-style: none;
}

.tta-menu-summary::-webkit-details-marker {
	display: none;
}

.tta-menu-summary::before {
	content: "+";
	margin-inline-end: 0.45rem;
	font-weight: 700;
}

.tta-menu[open] > .tta-menu-summary::before {
	content: "−";
}

.tta-nav {
	grid-column: 1 / -1;
	display: none;
}

.tta-menu[open] + .tta-nav {
	display: block;
}

.tta-nav-list {
	list-style: none;
	margin: 0;
	padding: 0.25rem 0 0;
	display: flex;
	flex-direction: column;
	gap: 0.15rem;
}

.tta-nav-list a {
	display: block;
	padding: 0.6rem 0.25rem;
	color: var(--tta-ivory);
	text-decoration: none;
	border-bottom: 1px solid rgba(220, 239, 232, 0.25);
}

.tta-nav-list a:hover,
.tta-nav-list a:focus {
	color: var(--tta-mint);
}

.tta-quiz-fixed {
	display: none;
}

/* --- main --- */

.tta-main {
	display: block;
}

.tta-wrap {
	max-width: var(--tta-wide);
	margin: 0 auto;
	padding: 1.5rem 1rem;
}

.tta-page-head {
	padding-top: 0.5rem;
}

.tta-parent-link {
	margin: 0 0 0.5rem;
	font-size: 0.875rem;
}

.tta-page-lede {
	font-size: 1.0625rem;
	color: var(--tta-tea);
}

.tta-page-body h2 {
	margin-top: 2rem;
	padding-top: 0.75rem;
	border-top: 2px solid var(--tta-mint);
}

.tta-page-body h3 {
	margin-top: 1.5rem;
}

.tta-page-body ul,
.tta-page-body ol {
	max-width: var(--tta-measure);
}

.tta-page-body li {
	margin-bottom: 0.4rem;
}

.tta-note {
	background: var(--tta-mint);
	border-left: 4px solid var(--tta-ink);
	padding: 0.9rem 1rem;
	margin: 1.25rem 0;
	max-width: var(--tta-measure);
}

.tta-note p:last-child {
	margin-bottom: 0;
}

.tta-sources {
	background: var(--tta-warm);
	padding: 1rem;
	margin: 1.5rem 0;
	max-width: var(--tta-measure);
}

.tta-sources ul {
	margin: 0;
}

.tta-sources a {
	overflow-wrap: anywhere;
}

.tta-links ul {
	list-style: none;
	padding: 0;
	margin: 0;
}

.tta-links li {
	margin-bottom: 0.5rem;
}

.tta-page-foot {
	margin-top: 2rem;
	padding-top: 1rem;
	border-top: 1px solid var(--tta-mint);
	font-size: 0.9375rem;
	color: var(--tta-tea);
}

.tta-updated {
	margin: 0;
}

/* --- native contact form --- */

.tta-contact-channel {
	max-width: var(--tta-measure);
	margin: 1.5rem 0;
}

.tta-contact-form {
	position: relative;
	padding: 1rem;
	border: 1px solid var(--tta-mint);
	border-radius: 0.25rem;
	background: var(--tta-warm);
}

.tta-contact-form label {
	display: block;
	font-weight: 700;
	color: var(--tta-ink);
}

.tta-contact-form input[type="text"],
.tta-contact-form input[type="email"],
.tta-contact-form textarea {
	display: block;
	width: 100%;
	max-width: 38rem;
	min-height: 2.75rem;
	margin-top: 0.35rem;
	padding: 0.6rem;
	border: 1px solid var(--tta-tea);
	border-radius: 0.2rem;
	background: var(--tta-ivory);
	color: var(--tta-text);
	font: inherit;
}

.tta-contact-form textarea {
	min-height: 10rem;
	resize: vertical;
}

.tta-contact-form button {
	border: 0;
	font: inherit;
	cursor: pointer;
}

.tta-contact-honeypot {
	position: absolute;
	left: -10000px;
	top: auto;
	width: 1px;
	height: 1px;
	overflow: hidden;
}

.tta-contact-note {
	font-size: 0.9375rem;
	color: var(--tta-tea);
}

.tta-contact-result {
	padding: 0.75rem 1rem;
	border-left: 4px solid var(--tta-ink);
	background: var(--tta-mint);
}

.tta-check-error {
	margin: 0 0 0.75rem;
	padding: 0.5rem 0.75rem;
	border-left: 4px solid var(--tta-tea);
	color: var(--tta-tea);
	font-weight: 700;
}

.tta-check-error[hidden] {
	display: none;
}

/* --- footer --- */

.tta-footer {
	background: var(--tta-ink);
	color: var(--tta-ivory);
	margin-top: 2.5rem;
}

.tta-footer-inner {
	max-width: var(--tta-wide);
	margin: 0 auto;
	padding: 2rem 1rem calc(var(--tta-bar) + 1.5rem);
}

.tta-footer-columns {
	display: grid;
	grid-template-columns: 1fr;
	gap: 1.5rem;
}

.tta-footer-column {
	min-width: 0;
}

.tta-footer-heading {
	font-size: 1rem;
	color: var(--tta-mint);
	margin: 0 0 0.6rem;
}

.tta-footer-list {
	list-style: none;
	margin: 0;
	padding: 0;
}

.tta-footer-list li {
	margin-bottom: 0.35rem;
}

.tta-footer-list a {
	color: var(--tta-ivory);
	text-decoration: none;
	font-size: 0.9375rem;
}

.tta-footer-list a:hover,
.tta-footer-list a:focus {
	color: var(--tta-mint);
	text-decoration: underline;
}

.tta-footer-notice {
	margin: 2rem 0 1rem;
	padding-top: 1rem;
	border-top: 1px solid rgba(220, 239, 232, 0.3);
	font-size: 0.9375rem;
	color: var(--tta-mint);
	max-width: none;
}

.tta-footer-brand {
	margin: 0;
	max-width: none;
	font-size: 0.9375rem;
}

.tta-footer-brand-name {
	display: block;
	font-family: var(--tta-serif);
}

.tta-footer-slogan {
	display: block;
	color: var(--tta-mint);
}

/* --- fixed small-screen quiz bar --- */

.tta-quiz-bar {
	position: fixed;
	left: 0;
	right: 0;
	bottom: 0;
	z-index: 50;
	display: block;
	min-height: var(--tta-bar);
	padding: 0.9rem 1rem;
	background: var(--tta-gold);
	color: var(--tta-ink);
	font-weight: 700;
	text-align: center;
	text-decoration: none;
}

.tta-quiz-bar:hover,
.tta-quiz-bar:focus {
	background: var(--tta-mint);
	color: var(--tta-ink);
}

/* Reserve the bar's space so it never covers body copy or footer links. */
body {
	padding-bottom: var(--tta-bar);
}

/* --- buttons in content --- */

.tta-actions {
	display: flex;
	flex-wrap: wrap;
	gap: 0.75rem;
	margin: 1.25rem 0;
	padding: 0;
	list-style: none;
}

.tta-button,
.tta-actions a {
	display: inline-block;
	padding: 0.7rem 1.15rem;
	border-radius: 0.25rem;
	background: var(--tta-ink);
	color: var(--tta-ivory);
	text-decoration: none;
	font-weight: 700;
}

.tta-actions a.tta-button-secondary {
	background: transparent;
	color: var(--tta-ink);
	border: 2px solid var(--tta-ink);
}

.tta-button:hover,
.tta-button:focus,
.tta-actions a:hover,
.tta-actions a:focus {
	background: var(--tta-tea);
	color: var(--tta-ivory);
}

/* --- desktop --- */

@media (min-width: 768px) {
	.tta-header-inner {
		grid-template-columns: auto 1fr auto;
		padding: 1rem 1.5rem;
	}

	.tta-menu {
		display: none;
	}

	.tta-nav {
		grid-column: auto;
		display: block;
	}

	.tta-nav-list {
		flex-direction: row;
		flex-wrap: wrap;
		justify-content: flex-end;
		gap: 0.25rem 1.1rem;
		padding: 0;
	}

	.tta-nav-list a {
		border-bottom: 0;
		padding: 0.35rem 0;
	}

	.tta-quiz-bar {
		display: none;
	}

	body {
		padding-bottom: 0;
	}

	.tta-quiz-fixed {
		position: fixed;
		right: 0;
		top: 45vh;
		z-index: 45;
		display: block;
		max-width: 3.25rem;
		padding: 0.9rem 0.65rem;
		background: var(--tta-gold);
		color: var(--tta-ink);
		font-weight: 700;
		text-decoration: none;
		border-radius: 0.25rem 0 0 0.25rem;
		line-height: 1.45;
	}

	.tta-quiz-fixed:hover,
	.tta-quiz-fixed:focus {
		background: var(--tta-mint);
	}

	.tta-footer-columns {
		grid-template-columns: repeat(4, minmax(0, 1fr));
		gap: 2rem;
	}

	.tta-footer-inner {
		padding-bottom: 2.5rem;
	}
}

/* The side button is dropped when the viewport is too short or too narrow to spare it. */
@media (max-width: 1099px), (max-height: 34rem) {
	.tta-quiz-fixed {
		display: none;
	}
}

@media (prefers-reduced-motion: reduce) {
	*,
	*::before,
	*::after {
		animation-duration: 0.001ms !important;
		animation-iteration-count: 1 !important;
		transition-duration: 0.001ms !important;
		scroll-behavior: auto !important;
	}
}