/* Header and footer: dark chrome, same in light and dark themes. Structure follows the HINT header. */

:root {
	/* Alpha >= 0.72 keeps white text >= 4.5:1 even over a white page (HINT's 0.48 does not). */
	--ciatec-chrome-bg: rgba(11, 31, 51, 0.75);
	--ciatec-chrome-bg-solid: rgba(11, 31, 51, 0.97);
	--ciatec-chrome-border: rgba(255, 255, 255, 0.2);
	--ciatec-flag-w: 1.75rem;
}

/* Header ---------------------------------------------------------------- */
.ciatec-header {
	position: fixed;
	inset: 0 0 auto 0;
	z-index: 100;
	background: var(--ciatec-chrome-bg);
	border-bottom: 1px solid var(--ciatec-chrome-border);
	color: var(--ciatec-on-dark);
	-webkit-backdrop-filter: blur(10px);
	backdrop-filter: blur(10px);
}
@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
	.ciatec-header { background: var(--ciatec-chrome-bg-solid); }
}
@media (prefers-reduced-transparency: reduce) {
	.ciatec-header { background: var(--ciatec-chrome-bg-solid); -webkit-backdrop-filter: none; backdrop-filter: none; }
}
.ciatec-header.is-open { background: var(--ciatec-chrome-bg-solid); }

.ciatec-header__inner {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: var(--ciatec-space-4);
	width: 100%;
	max-width: var(--ciatec-container);
	min-height: var(--ciatec-header-h);
	margin-inline: auto;
	padding-inline: var(--ciatec-space-3);
	box-sizing: border-box;
}
.ciatec-logo {
	display: inline-flex;
	align-items: center;
	flex: 0 0 auto;
	min-height: var(--ciatec-tap);
	color: var(--ciatec-on-dark);
	font-family: var(--ciatec-font-heading);
	font-weight: 700;
	font-size: 1.25rem;
	line-height: 0;
	text-decoration: none;
}
.ciatec-logo img { display: block; width: auto; height: 3rem; }

.ciatec-header__panel {
	display: flex;
	align-items: center;
	gap: var(--ciatec-space-4);
	margin-inline-start: auto;
}
.ciatec-header__utils {
	display: flex;
	align-items: center;
	gap: var(--ciatec-space-1);
}

.ciatec-header a,
.ciatec-footer a { color: var(--ciatec-on-dark); }
.ciatec-header :focus-visible,
.ciatec-footer :focus-visible { outline-color: var(--ciatec-primary-on-dark); }

.ciatec-nav ul {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: var(--ciatec-space-1) var(--ciatec-space-4);
	margin: 0;
	padding: 0;
	list-style: none;
}
.ciatec-nav a {
	display: inline-flex;
	align-items: center;
	min-height: var(--ciatec-tap);
	border-bottom: 2px solid transparent;
	font-weight: 700;
	line-height: 1.2;
	text-decoration: none;
	transition: border-color 0.15s ease;
}
.ciatec-nav a:hover,
.ciatec-nav a:focus-visible { border-bottom-color: var(--ciatec-accent); }
.ciatec-nav .current-menu-item > a { border-bottom-color: var(--ciatec-on-dark); }

/* Language flags -------------------------------------------------------- */
.ciatec-lang { position: relative; display: inline-flex; }
.ciatec-lang__trigger,
.ciatec-lang__option,
.ciatec-theme-toggle {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	min-width: var(--ciatec-tap);
	min-height: var(--ciatec-tap);
	padding: 0;
	border: 0;
	border-radius: var(--ciatec-radius-md);
	background: transparent;
	color: var(--ciatec-on-dark);
	cursor: pointer;
}
.ciatec-lang__trigger:hover,
.ciatec-lang__option:hover,
.ciatec-theme-toggle:hover { background: rgba(255, 255, 255, 0.12); }
.ciatec-lang__flag {
	display: block;
	flex: 0 0 auto;
	width: var(--ciatec-flag-w);
	height: calc(var(--ciatec-flag-w) * 0.6);
	object-fit: cover;
	border: 1px solid var(--ciatec-chrome-border);
	border-radius: 2px;
}
.ciatec-lang__code { font-weight: 700; }
.ciatec-lang__menu {
	position: absolute;
	top: calc(100% + var(--ciatec-space-1));
	right: 0;
	z-index: 10;
	display: flex;
	flex-direction: column;
	width: max-content;
	margin: 0;
	padding: 0.25rem;
	border: 1px solid var(--ciatec-chrome-border);
	border-radius: var(--ciatec-radius-md);
	background: var(--ciatec-chrome-bg-solid);
	list-style: none;
}
.ciatec-lang__menu[hidden] { display: none; }
.ciatec-lang--inline ul { display: flex; gap: 0; margin: 0; padding: 0; list-style: none; }
.ciatec-lang--inline [aria-current] { background: rgba(255, 255, 255, 0.16); }

/* Light/dark switch: moon while light (go dark), sun while dark (go light). */
.ciatec-theme-toggle .ciatec-icon { width: 1.25rem; height: 1.25rem; }
.ciatec-theme-toggle__sun { display: none; }
:root[data-theme="dark"] .ciatec-theme-toggle__sun { display: inline-flex; }
:root[data-theme="dark"] .ciatec-theme-toggle__moon { display: none; }

/* The parent theme paints focused/hovered buttons pink: keep ours on the chrome palette. */
.ciatec-header button:focus,
.ciatec-header button:active { color: var(--ciatec-on-dark); background-color: rgba(255, 255, 255, 0.12); }
.ciatec-header button:hover { color: var(--ciatec-on-dark); }

/* Mobile menu toggle (shown by header.js; without JS the menu just stays visible). */
.ciatec-header__toggle {
	display: none;
	align-items: center;
	justify-content: center;
	width: var(--ciatec-tap);
	height: var(--ciatec-tap);
	padding: 0;
	border: 1px solid var(--ciatec-chrome-border);
	border-radius: var(--ciatec-radius-md);
	background: transparent;
	color: var(--ciatec-on-dark);
	cursor: pointer;
}
.ciatec-header__toggle-bars,
.ciatec-header__toggle-bars::before,
.ciatec-header__toggle-bars::after {
	display: block;
	width: 1.25rem;
	height: 2px;
	background: currentColor;
	content: "";
}
.ciatec-header__toggle-bars { position: relative; }
.ciatec-header__toggle-bars::before { position: absolute; top: -6px; }
.ciatec-header__toggle-bars::after { position: absolute; top: 6px; }

@media (max-width: 900px) {
	.ciatec-header__inner { flex-wrap: wrap; align-content: flex-start; row-gap: 0; }
	.ciatec-logo { min-height: var(--ciatec-header-h); }
	.ciatec-header__toggle:not([hidden]) { display: inline-flex; }
	.ciatec-logo img { height: 2.5rem; }
	.ciatec-header__panel {
		flex-basis: 100%;
		flex-direction: column;
		align-items: flex-start;
		gap: var(--ciatec-space-2);
		max-height: calc(100vh - var(--ciatec-header-h));
		overflow-y: auto;
		padding-bottom: var(--ciatec-space-3);
		margin-inline-start: 0;
	}
	.ciatec-header__panel[hidden] { display: none; }
	.ciatec-nav ul { flex-direction: column; align-items: flex-start; gap: 0; }
	.ciatec-lang__menu { right: auto; left: 0; }
}

/* Footer ---------------------------------------------------------------- */
.ciatec-footer {
	padding: var(--ciatec-space-5) 0 var(--ciatec-space-3);
	border-top: 1px solid var(--ciatec-chrome-border);
	background: var(--ciatec-navy);
	color: var(--ciatec-on-dark-muted);
}
.ciatec-footer__inner {
	display: flex;
	flex-wrap: wrap;
	align-items: flex-start;
	justify-content: space-between;
	gap: var(--ciatec-space-4);
	max-width: var(--ciatec-container);
	margin-inline: auto;
	padding-inline: var(--ciatec-space-3); /* same gutter as .ciatec-container */
	box-sizing: border-box;
}
.ciatec-footer p { margin: 0 0 var(--ciatec-space-1); }
.ciatec-footer__logo { display: block; width: auto; max-width: 100%; height: 3rem; margin-bottom: var(--ciatec-space-2); } /* 60% smaller than the original 7.5rem */
.ciatec-footer__name {
	color: var(--ciatec-on-dark);
	font-family: var(--ciatec-font-heading);
	font-weight: 600;
}
.ciatec-copyright {
	width: calc(100% - 2 * var(--ciatec-space-3));
	max-width: calc(var(--ciatec-container) - 2 * var(--ciatec-space-3));
	margin: var(--ciatec-space-4) auto 0 !important;
	padding-top: var(--ciatec-space-2);
	border-top: 1px solid var(--ciatec-chrome-border);
	box-sizing: border-box;
	font-size: 0.875rem;
}

@media (max-width: 767px) {
	.ciatec-footer__inner { flex-direction: column; }
}