:root {
	--ptc-bg: #f4fcfe;
	--ptc-surface: #ffffff;
	--ptc-ink: #15333a;
	--ptc-muted: #58747a;
	--ptc-main: #0cc0df;
	--ptc-secondary: #ff66c4;
	--ptc-line: #cdecf2;
	--ptc-on-main: #15333a;
	--ptc-header-bg: rgba(255, 255, 255, 0.98);
	--ptc-shadow: 0 12px 30px rgba(21, 51, 58, 0.09);
	--ptc-container: 1180px;
	--ptc-focus: 0 0 0 4px rgba(12, 192, 223, 0.28);
}

html[data-theme="dark"] {
	--ptc-bg: #0f2024;
	--ptc-surface: #163036;
	--ptc-ink: #f3fcfe;
	--ptc-muted: #b4d0d6;
	--ptc-line: #2d5962;
	--ptc-header-bg: rgba(22, 48, 54, 0.98);
	--ptc-shadow: 0 12px 30px rgba(0, 0, 0, 0.24);
}

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

html {
	scroll-behavior: smooth;
}

body {
	margin: 0;
	background: var(--ptc-bg);
	color: var(--ptc-ink);
	font-family: "Segoe UI", Arial, sans-serif;
	font-size: 16px;
	line-height: 1.65;
}

html[lang^="bn"] body,
html[lang^="bn"] button,
html[lang^="bn"] input,
html[lang^="bn"] textarea,
html[lang^="bn"] select {
	font-family: "Noto Sans Bengali", "Nirmala UI", Vrinda, sans-serif;
}

html[lang^="bn"] :where(h1, h2, h3, h4, h5, h6, .ptc-wordmark-main) {
	font-family: "Noto Sans Bengali", "Nirmala UI", Vrinda, sans-serif;
	letter-spacing: 0;
}

a {
	color: inherit;
}

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

.ptc-skip-link {
	position: fixed;
	top: 10px;
	left: 10px;
	z-index: 9999;
	padding: 10px 14px;
	border-radius: 8px;
	background: var(--ptc-ink);
	color: #fff;
	transform: translateY(-160%);
}

.ptc-skip-link:focus {
	transform: translateY(0);
}

.ptc-site-header {
	position: relative;
	z-index: 100;
	border-bottom: 1px solid var(--ptc-line);
	background: var(--ptc-header-bg);
	box-shadow: 0 5px 18px rgba(21, 51, 58, 0.05);
	transition: background-color 220ms ease, box-shadow 220ms ease, border-color 220ms ease;
}

.ptc-header-actions {
	display: flex;
	order: 4;
	align-items: center;
	gap: 8px;
}

.ptc-language-switcher {
	display: inline-flex;
	position: relative;
	order: 0;
	padding: 3px;
	border: 1px solid var(--ptc-line);
	border-radius: 10px;
	background: var(--ptc-bg);
	align-items: center;
	gap: 2px;
	overflow: hidden;
}

.ptc-language-switcher::before {
	position: absolute;
	top: 3px;
	bottom: 3px;
	left: 3px;
	width: calc(50% - 4px);
	border-radius: 7px;
	background: var(--ptc-main);
	box-shadow: 0 5px 14px rgba(12, 192, 223, 0.25);
	content: "";
	transition: transform 260ms cubic-bezier(.2,.8,.2,1), background-color 240ms ease, box-shadow 240ms ease;
}

html[lang^="bn"] .ptc-language-switcher::before {
	transform: translateX(calc(100% + 2px));
}

.ptc-language-switcher a {
	position: relative;
	z-index: 1;
	display: grid;
	min-width: 42px;
	min-height: 40px;
	padding: 6px 8px;
	border-radius: 7px;
	align-items: center;
	color: var(--ptc-ink);
	font-size: 0.82rem;
	font-weight: 700;
	line-height: 1;
	text-align: center;
	text-decoration: none;
	transition: color 220ms ease, transform 220ms cubic-bezier(.2,.8,.2,1);
}

.ptc-language-switcher a[aria-current="true"] {
	background: transparent;
	color: var(--ptc-on-main);
}

.ptc-language-switcher a:hover,
.ptc-language-switcher a:focus-visible {
	transform: translateY(-1px);
}

.ptc-language-switcher a:focus-visible {
	outline: 2px solid var(--ptc-main);
	outline-offset: 2px;
}

.ptc-theme-toggle {
	display: flex;
	position: relative;
	width: 56px;
	height: 34px;
	padding: 4px;
	border: 1px solid var(--ptc-line);
	border-radius: 999px;
	background: var(--ptc-bg);
	color: var(--ptc-ink);
	cursor: pointer;
	align-items: center;
	transition: background-color 260ms ease, border-color 260ms ease, box-shadow 260ms ease;
}

.ptc-theme-icon {
	position: relative;
	width: 24px;
	height: 24px;
	border: 0;
	border-radius: 50%;
	background: #ffffff;
	box-shadow: 0 3px 10px rgba(21, 51, 58, 0.22), inset 0 0 0 2px var(--ptc-main);
	transform: translateX(0) rotate(0);
	transition: transform 320ms cubic-bezier(.2,.8,.2,1), background-color 260ms ease, box-shadow 260ms ease;
}

html[data-theme="dark"] .ptc-theme-icon {
	border-color: transparent;
	background: var(--ptc-main);
	box-shadow: inset -7px -4px 0 var(--ptc-bg), 0 3px 10px rgba(0, 0, 0, 0.28);
	transform: translateX(22px) rotate(24deg);
}

body,
.ptc-site-header,
.ptc-primary-nav,
.ptc-language-switcher,
.ptc-hero,
.ptc-notices,
.ptc-notice-shell,
.ptc-resources,
.ptc-resource-link,
.ptc-testimonials,
.ptc-testimonial,
.ptc-quiz-links a,
.ptc-site-footer {
	transition: background-color 300ms ease, color 300ms ease, border-color 300ms ease, box-shadow 300ms ease;
}

.ptc-main {
	transition: opacity 180ms ease, transform 180ms ease;
}

html.ptc-language-leaving .ptc-main {
	opacity: 0;
	transform: translateY(5px);
}

.ptc-header-inner {
	display: flex;
	min-height: 76px;
	max-width: var(--ptc-container);
	margin: 0 auto;
	padding: 12px 18px;
	align-items: center;
	justify-content: space-between;
	gap: 18px;
}

.ptc-wordmark {
	display: inline-flex;
	min-width: 0;
	flex: 0 0 auto;
	align-items: center;
	gap: 7px;
	text-decoration: none;
}

.ptc-wordmark-main {
	font-family: "Trebuchet MS", Arial, sans-serif;
	font-size: clamp(1.18rem, 5.2vw, 1.75rem);
	font-weight: 700;
	line-height: 1;
	letter-spacing: -0.045em;
	white-space: nowrap;
}

.ptc-wordmark-main::first-letter {
	color: var(--ptc-main);
}

.ptc-wordmark-dot {
	width: 10px;
	height: 10px;
	border-radius: 50%;
	background: var(--ptc-secondary);
	box-shadow: 0 0 0 4px rgba(255, 102, 196, 0.15);
	flex: 0 0 auto;
}

.ptc-logo-image {
	width: auto;
	max-height: 52px;
}

.ptc-menu-toggle {
	display: inline-flex;
	min-width: 48px;
	min-height: 48px;
	padding: 10px;
	border: 1px solid var(--ptc-line);
	border-radius: 10px;
	background: var(--ptc-bg);
	color: var(--ptc-ink);
	align-items: center;
	justify-content: center;
	cursor: pointer;
}

.ptc-menu-toggle-label {
	position: absolute;
	width: 1px;
	height: 1px;
	overflow: hidden;
	clip: rect(0 0 0 0);
}

.ptc-menu-icon {
	display: grid;
	width: 24px;
	gap: 5px;
}

.ptc-menu-icon span {
	display: block;
	height: 2px;
	border-radius: 2px;
	background: currentColor;
	transition: transform 180ms ease, opacity 180ms ease;
}

.is-menu-open .ptc-menu-icon span:nth-child(1) {
	transform: translateY(7px) rotate(45deg);
}

.is-menu-open .ptc-menu-icon span:nth-child(2) {
	opacity: 0;
}

.is-menu-open .ptc-menu-icon span:nth-child(3) {
	transform: translateY(-7px) rotate(-45deg);
}

.ptc-primary-nav {
	display: none;
	position: absolute;
	top: 100%;
	left: 0;
	right: 0;
	padding: 10px 18px 18px;
	border-bottom: 1px solid var(--ptc-line);
	background: var(--ptc-surface);
	box-shadow: var(--ptc-shadow);
}

.is-menu-open .ptc-primary-nav {
	display: block;
}

.ptc-menu {
	display: grid;
	margin: 0;
	padding: 0;
	gap: 4px;
	list-style: none;
}

.ptc-menu a {
	position: relative;
	display: flex;
	min-height: 48px;
	padding: 11px 13px;
	border-radius: 10px;
	align-items: center;
	font-weight: 650;
	line-height: 1.25;
	text-decoration: none;
	white-space: nowrap;
}

.ptc-menu a::after {
	position: absolute;
	right: 13px;
	bottom: 7px;
	left: 13px;
	height: 2px;
	border-radius: 999px;
	background: var(--ptc-main);
	content: "";
	opacity: 0;
	transform: scaleX(0.35);
	transition: opacity 180ms ease, transform 180ms ease;
}

.ptc-menu a:hover,
.ptc-menu a:focus-visible,
.ptc-menu .current-menu-item > a {
	background: rgba(12, 192, 223, 0.12);
	color: var(--ptc-ink);
}

.ptc-menu a:hover::after,
.ptc-menu a:focus-visible::after,
.ptc-menu .current-menu-item > a::after {
	opacity: 1;
	transform: scaleX(1);
}

.ptc-theme-toggle:focus-visible {
	outline: 2px solid var(--ptc-main);
	outline-offset: 3px;
	box-shadow: var(--ptc-focus);
}

.ptc-menu a:focus-visible,
.ptc-menu-toggle:focus-visible,
.ptc-wordmark:focus-visible,
.ptc-skip-link:focus {
	outline: 2px solid var(--ptc-main);
	outline-offset: 3px;
	box-shadow: var(--ptc-focus);
}

.ptc-main {
	min-height: 58vh;
}

.ptc-content-container,
.ptc-page-content {
	width: min(100% - 36px, var(--ptc-container));
	margin: 0 auto;
	padding: 48px 0;
}

.ptc-entry-title {
	margin: 0 0 24px;
	font-family: "Trebuchet MS", Arial, sans-serif;
	font-size: clamp(2rem, 8vw, 4rem);
	line-height: 1.08;
	letter-spacing: -0.04em;
}

.ptc-site-footer {
	border-top: 1px solid var(--ptc-line);
	background: var(--ptc-surface);
	color: var(--ptc-muted);
}

.ptc-footer-inner {
	width: min(100% - 36px, var(--ptc-container));
	margin: 0 auto;
	padding: 22px 0;
	font-size: 0.9rem;
}

.ptc-footer-inner p {
	margin: 0;
}

@media (min-width: 960px) {
	.ptc-site-header {
		position: sticky;
		top: 0;
		backdrop-filter: blur(14px);
	}

	.ptc-header-inner {
		min-height: 88px;
		padding-inline: 24px;
	}

	.ptc-menu-toggle {
		display: none;
	}

	.ptc-primary-nav {
		display: block;
		position: static;
		padding: 0;
		border: 0;
		box-shadow: none;
		margin-left: auto;
	}

	.ptc-menu {
		display: flex;
		align-items: center;
		gap: 2px;
	}

	.ptc-menu a {
		min-height: 44px;
		padding: 10px 11px;
		font-size: 0.93rem;
	}

	.ptc-menu li:last-child a {
		margin-left: 6px;
		padding-inline: 18px;
		background: var(--ptc-main);
		color: var(--ptc-on-main);
	}

	.ptc-menu li:last-child a:hover,
	.ptc-menu li:last-child a:focus-visible {
		background: var(--ptc-main);
		box-shadow: var(--ptc-focus);
	}

	.ptc-menu li:last-child a::after {
		display: none;
	}

	html[lang^="bn"] .ptc-header-inner {
		gap: 10px;
	}

	html[lang^="bn"] .ptc-wordmark-main {
		font-family: "Trebuchet MS", Arial, sans-serif;
		font-size: 1.42rem;
		letter-spacing: -0.045em;
	}

	html[lang^="bn"] .ptc-menu a {
		padding-inline: 8px;
		font-size: 0.84rem;
		line-height: 1.2;
	}

	html[lang^="bn"] .ptc-menu li:last-child a {
		margin-left: 2px;
		padding-inline: 13px;
	}

	html[lang^="bn"] .ptc-language-switcher a {
		min-width: 38px;
		padding-inline: 6px;
	}

	html[lang^="bn"] .ptc-theme-toggle {
		width: 44px;
		height: 44px;
	}
}

@media (min-width: 1280px) {
	.ptc-header-inner {
		max-width: 1360px;
	}
}

@media (min-width: 960px) and (max-width: 1279px) {
	.ptc-primary-nav {
		display: none;
		position: absolute;
		top: 100%;
		left: 0;
		right: 0;
		padding: 10px 18px 18px;
		border-bottom: 1px solid var(--ptc-line);
		background: var(--ptc-surface);
		box-shadow: var(--ptc-shadow);
	}

	.ptc-menu-toggle,
	.is-menu-open .ptc-primary-nav {
		display: flex;
	}

	.ptc-menu {
		display: grid;
	}
}

@media (max-width: 699px) {
	.ptc-header-inner {
		min-height: 64px;
		padding: 10px 12px;
		flex-wrap: nowrap;
		gap: 8px;
	}

	.ptc-wordmark {
		flex: 1 1 0;
		max-width: none;
		overflow: hidden;
	}

	.ptc-header-actions {
		position: static;
		flex: 0 0 auto;
		margin-left: auto;
		gap: 5px;
	}

	.ptc-theme-toggle,
	.ptc-menu-toggle {
		min-width: 44px;
		min-height: 44px;
	}

	.ptc-theme-toggle {
		width: 44px;
		height: 44px;
		padding: 4px;
	}

	.ptc-language-switcher {
		display: inline-flex;
		flex: 0 0 auto;
		width: auto;
		padding: 2px;
		margin: 0;
	}

	.ptc-language-switcher a {
		min-width: 34px;
		min-height: 38px;
		padding: 5px 6px;
		font-size: 0.74rem;
	}

	.ptc-wordmark-main {
		font-size: clamp(1rem, 4.4vw, 1.16rem);
	}

	html[data-theme="dark"] .ptc-theme-icon {
		transform: translateX(10px) rotate(24deg);
	}

	.ptc-theme-icon {
		width: 22px;
		height: 22px;
	}

	.ptc-content-container,
	.ptc-page-content {
		padding-block: 32px;
	}

	.ptc-entry-title {
		margin-bottom: 18px;
		font-size: clamp(1.75rem, 8vw, 2.5rem);
	}
}

@media (max-width: 374px) {
	.ptc-header-inner {
		padding-inline: 10px;
		gap: 6px;
	}

	.ptc-wordmark-main {
		font-size: 0.96rem;
	}

	.ptc-wordmark-dot {
		width: 7px;
		height: 7px;
	}

	.ptc-language-switcher a {
		min-width: 32px;
		padding-inline: 4px;
	}
}

@media (max-width: 340px) {
	.ptc-header-inner {
		flex-wrap: wrap;
	}

	.ptc-wordmark {
		flex-basis: calc(100% - 96px);
	}

	.ptc-header-actions {
		width: 100%;
		justify-content: flex-end;
	}
}

@media (prefers-reduced-motion: reduce) {
	html {
		scroll-behavior: auto;
	}

	*,
	*::before,
	*::after {
		scroll-behavior: auto !important;
		transition-duration: 0.01ms !important;
	}
}