/* ==========================================================================
   layout.css — containers, grids, header, footer, page heroes, content layout.
   Mobile-first; breakpoints scale up.
   ========================================================================== */

.container {
	width: 100%;
	max-width: var(--container);
	margin-inline: auto;
	padding-inline: var(--gutter);
}
.container--narrow { max-width: var(--container-narrow); }
.container--wide { max-width: var(--container-wide); }

.section { padding-block: var(--section-y); }
.site-main { display: block; }

/* ---- Section headings ---- */
.section__head { margin-bottom: var(--space-6); max-width: var(--measure); }
.section__head--center { margin-inline: auto; text-align: center; }
.section__title { margin-top: var(--space-2); }
.section__intro { margin-top: var(--space-3); color: var(--c-muted); font-size: 1.1rem; }
.section__action { margin-top: var(--space-6); text-align: center; }
.section__action--left { text-align: left; }
.section__disclosure,
.disclosure-banner {
	margin-top: var(--space-6);
	color: var(--c-faint);
	font-size: var(--fs-sm);
	max-width: var(--measure);
}
.section__head--center + .card-grid { margin-top: var(--space-6); }
.disclosure-banner {
	margin-inline: auto;
	padding: var(--space-3) var(--space-4);
	border: 1px solid var(--c-line);
	border-radius: var(--radius-sm);
	background: var(--glass-bg);
	text-align: center;
}

/* ==========================================================================
   Site header — floating glass bar
   ========================================================================== */
.site-header {
	position: sticky;
	top: 0;
	z-index: var(--z-header);
	background: rgba(4, 20, 27, 0.72);
	backdrop-filter: blur(var(--glass-blur));
	-webkit-backdrop-filter: blur(var(--glass-blur));
	border-bottom: 1px solid var(--c-line);
}
.site-header__inner {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: var(--space-4);
	min-height: 68px;
}
.brand { display: inline-flex; align-items: center; gap: var(--space-2); color: #fff; font-family: var(--font-head); font-weight: 700; }
.brand:hover { color: #fff; }
.brand__mark { display: inline-grid; place-items: center; width: 38px; height: 38px; border-radius: 12px; background: var(--grad-aqua); color: #04141b; box-shadow: var(--shadow-glow); }
.brand__icon { width: 22px; height: 22px; }
.brand__name { font-size: 1.15rem; letter-spacing: -0.01em; }
.custom-logo-link img { max-height: 44px; width: auto; }

.site-nav { display: flex; align-items: center; gap: var(--space-4); }
.site-nav__list { display: flex; align-items: center; gap: 1.1rem; }
.site-nav__list > li { flex: none; }
.site-nav__list a { color: var(--c-ink); font-weight: 500; font-size: 0.9rem; position: relative; white-space: nowrap; }
.site-nav__list a:hover { color: var(--c-aqua); }
.site-nav__list .current-menu-item > a { color: var(--c-aqua); }
.site-nav__cta,
.site-nav__help { white-space: nowrap; }

.nav-toggle { display: none; flex-direction: column; gap: 5px; width: 44px; height: 44px; align-items: center; justify-content: center; background: transparent; border: 1px solid var(--c-line); border-radius: var(--radius-sm); }
.nav-toggle__bar { width: 22px; height: 2px; background: var(--c-ink); border-radius: 2px; transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease); }

/* ---- Mobile nav ---- */
@media (max-width: 1120px) {
	.nav-toggle { display: flex; }
	.site-nav {
		position: fixed;
		inset: 68px 0 auto 0;
		flex-direction: column;
		align-items: stretch;
		gap: var(--space-2);
		padding: var(--space-5) var(--gutter) var(--space-6);
		background: var(--glass-bg-strong);
		backdrop-filter: blur(20px);
		-webkit-backdrop-filter: blur(20px);
		border-bottom: 1px solid var(--c-line);
		transform: translateY(-12px);
		opacity: 0;
		visibility: hidden;
		pointer-events: none;
		transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease), visibility var(--dur);
	}
	.site-nav.is-open { transform: translateY(0); opacity: 1; visibility: visible; pointer-events: auto; }
	.site-nav:not(.is-open) .site-nav__list,
	.site-nav:not(.is-open) .sub-menu,
	.site-nav:not(.is-open) a {
		visibility: hidden;
		pointer-events: none;
	}
	.site-nav.is-open .site-nav__list,
	.site-nav.is-open .sub-menu,
	.site-nav.is-open a {
		visibility: visible;
		pointer-events: auto;
	}
	.site-nav__list { flex-direction: column; align-items: stretch; gap: 0; }
	.site-nav__list a { display: block; padding: var(--space-3) var(--space-2); border-bottom: 1px solid var(--c-line); }
	.site-nav__cta,
	.site-nav__help { margin-top: var(--space-3); text-align: center; }
	.site-nav__help { margin-top: var(--space-2); }
	.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
	.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) { opacity: 0; }
	.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
}

/* ==========================================================================
   Dropdown submenus — desktop hover/focus dropdown, mobile inline accordion
   ========================================================================== */
.site-nav__list .menu-item-has-children { position: relative; }
.site-nav__list .menu-item-has-children > a::after { content: "\25BE"; margin-left: 0.35rem; font-size: 0.72em; opacity: 0.7; }
.site-nav__list .sub-menu {
	position: absolute; top: 100%; left: 0; min-width: 210px; list-style: none;
	display: flex; flex-direction: column; gap: 0; margin: 0.45rem 0 0; padding: 0.4rem;
	background: var(--glass-bg-strong); -webkit-backdrop-filter: blur(20px); backdrop-filter: blur(20px);
	border: 1px solid var(--c-line); border-radius: 12px; box-shadow: var(--shadow);
	opacity: 0; visibility: hidden; transform: translateY(-6px);
	transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease), visibility var(--dur);
	z-index: var(--z-header);
}
.site-nav__list .menu-item-has-children:hover > .sub-menu,
.site-nav__list .menu-item-has-children:focus-within > .sub-menu { opacity: 1; visibility: visible; transform: translateY(0); }
.site-nav__list .sub-menu li { width: 100%; }
.site-nav__list .sub-menu a { display: block; padding: 0.55rem 0.7rem; border-radius: 8px; white-space: nowrap; font-size: 0.92rem; border: 0; }
.site-nav__list .sub-menu a:hover { background: rgba(34, 211, 238, 0.1); color: var(--c-aqua); }

@media (max-width: 1120px) {
	.site-nav__list .menu-item-has-children { position: static; }
	.site-nav__list .menu-item-has-children > a::after { display: none; }
	.site-nav__list .sub-menu {
		position: static; opacity: 1; visibility: visible; transform: none;
		background: transparent; border: 0; box-shadow: none; -webkit-backdrop-filter: none; backdrop-filter: none;
		padding: 0 0 0.25rem 0.9rem; margin: 0;
	}
	.site-nav__list .sub-menu a { color: var(--c-muted); padding: 0.55rem 0.5rem; border-bottom: 1px solid var(--c-line); }
}

/* ==========================================================================
   Page heroes (non-home)
   ========================================================================== */
.page-hero {
	position: relative;
	padding-block: clamp(2.5rem, 6vw, 4.5rem) clamp(1.5rem, 3vw, 2.5rem);
	background: var(--grad-glow), var(--grad-deep);
	border-bottom: 1px solid var(--c-line);
	text-align: center;
}
.page-hero--post,
.page-hero--hub { text-align: center; }
.page-hero--slim { padding-block: clamp(2rem, 4vw, 3rem); text-align: left; }
.page-hero__title { margin-top: var(--space-2); }
.page-hero__desc { margin-top: var(--space-3); color: var(--c-muted); }

/* ==========================================================================
   Content + sidebar layout
   ========================================================================== */
.content-layout { display: grid; gap: var(--space-7); }
@media (min-width: 1000px) {
	.content-layout { grid-template-columns: minmax(0, 1fr) 320px; align-items: start; }
}
.content-layout__aside { display: grid; gap: var(--space-5); }
@media (min-width: 1000px) {
	.content-layout__aside { position: sticky; top: 88px; }
}

/* ==========================================================================
   Card grids
   ========================================================================== */
.card-grid { display: grid; gap: var(--space-5); margin-top: var(--space-6); }
.card-grid--2 { grid-template-columns: 1fr; }
.card-grid--3 { grid-template-columns: 1fr; }
.card-grid--4 { grid-template-columns: 1fr; }
@media (min-width: 600px) {
	.card-grid--2 { grid-template-columns: repeat(2, 1fr); }
	.card-grid--3 { grid-template-columns: repeat(2, 1fr); }
	.card-grid--4 { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 920px) {
	.card-grid--3 { grid-template-columns: repeat(3, 1fr); }
	.card-grid--4 { grid-template-columns: repeat(4, 1fr); }
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
	margin-top: var(--space-8);
	padding-block: var(--space-8) var(--space-6);
	background: var(--grad-deep);
	border-top: 1px solid var(--c-line);
}
.site-footer__top {
	display: grid;
	gap: var(--space-7);
	padding-bottom: var(--space-6);
	border-bottom: 1px solid var(--c-line);
}
@media (min-width: 880px) {
	.site-footer__top { grid-template-columns: 1.2fr 1fr 1.4fr; }
}
.site-footer__tagline { margin-top: var(--space-3); color: var(--c-muted); max-width: 34ch; }
.site-footer__brand .btn { margin-top: var(--space-4); }
.site-footer__list { display: grid; gap: var(--space-2); }
.site-footer__list a { color: var(--c-ink); }
.site-footer__list a:hover { color: var(--c-aqua); }
.site-footer__disclosure { margin-top: var(--space-5); color: var(--c-faint); font-size: var(--fs-sm); }
.site-footer__bottom {
	display: flex; flex-wrap: wrap; gap: var(--space-3) var(--space-5);
	align-items: center; justify-content: space-between;
	margin-top: var(--space-5);
}
.site-footer__copyright { color: var(--c-faint); font-size: var(--fs-sm); margin: 0; }
.site-footer__legal { display: flex; flex-wrap: wrap; gap: var(--space-4); }
.site-footer__legal a { color: var(--c-muted); font-size: var(--fs-sm); }
.site-footer__legal a:hover { color: var(--c-aqua); }