/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
	--brand-deep:   #1e1654;
	--brand-mid:    #3a3182;
	--brand-accent: #52489C;
	--brand-light:  #a89ed4;
	--teal-accent:  #59C3C3;
	--surface:      #ffffff;
	--surface-alt:  #f3f2fa;
	--surface-hover:#e9e7f5;
	--text:         #0d1117;
	--text-muted:   #4a5568;
	--text-on-dark: #dddaf5;
	--border:       #c9c5e8;
	--radius:       12px;
	--radius-lg:    20px;
	--shadow-sm:    0 1px 3px rgba(30,22,84,.06);
	--shadow-md:    0 4px 16px rgba(30,22,84,.08);
	--shadow-lg:    0 8px 32px rgba(30,22,84,.12);
	--transition:   .2s cubic-bezier(.4,0,.2,1);
	--space-1: .25rem;
	--space-2: .5rem;
	--space-3: .75rem;
	--space-4: 1rem;
	--space-5: 1.25rem;
	--space-6: 1.5rem;
	--space-7: 2rem;
	--space-8: 2.5rem;
	--space-9: 3rem;
	--space-10: 4rem;
	--text-xs: .7rem;
	--text-sm: .8rem;
	--text-base: 1rem;
	--text-md: 1rem;
	--text-lg: 1.1rem;
	--text-xl: 1.2rem;
	--text-2xl: 1.4rem;
}

html { scroll-behavior: smooth; }

body {
	font-family: 'Aptos', 'Segoe UI', system-ui, -apple-system, sans-serif;
	color: var(--text);
	line-height: 1.6;
	background: var(--surface);
	-webkit-font-smoothing: antialiased;
}

a {
	color: var(--brand-accent);
	text-decoration: none;
	transition: color var(--transition);
}
a:hover { color: var(--brand-mid); }

/* Focus-visible for keyboard navigation */
a:focus-visible, button:focus-visible, input:focus-visible {
	outline: 2px solid var(--brand-accent);
	outline-offset: 2px;
	border-radius: 4px;
}

.hero {
	background: linear-gradient(135deg, #52489C 0%, #4062BB 33%, #59C3C3 66%, #EBEBEB 100%);
	color: #ffffff;
	padding: 2.75rem 2rem 2.5rem;
	text-align: center;
	position: relative;
	overflow: hidden;
}
.hero::before {
	content: '';
	position: absolute;
	inset: 0;
	background:
		radial-gradient(ellipse 600px 400px at 20% 80%, rgba(82,72,156,.35) 0%, transparent 70%),
		radial-gradient(ellipse 500px 350px at 80% 20%, rgba(89,195,195,.18) 0%, transparent 70%);
	pointer-events: none;
}
.hero h1 {
	font-size: clamp(1.6rem, 4vw, 2.4rem);
	font-weight: 700;
	letter-spacing: -.02em;
	margin-bottom: var(--space-2);
	position: relative;
	color: #ffffff;
}
.hero p {
	font-size: var(--text-md);
	opacity: .9;
	max-width: 620px;
	margin: 0 auto;
	position: relative;
	color: #ffffff;
}
.hero a { color: #ffffff; font-weight: 700; text-decoration: underline; }
.hero a:hover { color: #d1fae5; }

/* ── Back to Hub ── */
.hero-back {
	min-height: 44px;
	position: absolute;
	top: 1rem;
	left: 1.25rem;
	display: inline-flex;
	align-items: center;
	gap: .4rem;
	padding: .35rem .8rem;
	background: rgba(255,255,255,.15);
	border: 1px solid rgba(255,255,255,.3);
	border-radius: 2rem;
	color: #ffffff;
	font-size: .78rem;
	font-weight: 600;
	text-decoration: underline;
	backdrop-filter: blur(4px);
	transition: background var(--transition), transform var(--transition);
	z-index: 1;
}
.hero-back:hover {
	background: rgba(255,255,255,.28);
	color: #ffffff;
	transform: translateX(-2px);
}
.hero-back svg {
	width: 14px;
	height: 14px;
	stroke: currentColor;
	fill: none;
	stroke-width: 2;
	stroke-linecap: round;
	stroke-linejoin: round;
	flex-shrink: 0;
}

/* ── Search ── */
.search-bar {
	max-width: 480px;
	margin: 1.25rem auto 0;
	position: relative;
}
.search-bar input {
	width: 100%;
	padding: .85rem 1.2rem .85rem 2.8rem;
	border: 1.5px solid rgba(255,255,255,.25);
	border-radius: 50px;
	background: rgba(255,255,255,.15);
	color: #ffffff;
	font-size: var(--text-md);
	backdrop-filter: blur(8px);
	transition: border-color var(--transition), background var(--transition);
}
.search-bar input::placeholder { color: rgba(255,255,255,.5); }
.search-bar input:focus {
	border-color: rgba(255,255,255,.45);
	background: rgba(255,255,255,.28);
}
.search-bar svg {
	position: absolute;
	left: 1rem;
	top: 50%;
	transform: translateY(-50%);
	width: 18px;
	height: 18px;
	stroke: rgba(255,255,255,.5);
	fill: none;
	pointer-events: none;
}

/* ── Nav Pills ── */
.nav-strip {
	background: var(--surface);
	border-bottom: 1px solid var(--border);
	padding: .75rem 2rem;
	position: sticky;
	top: 0;
	z-index: 100;
	overflow-x: auto;
	display: flex;
	gap: var(--space-2);
	justify-content: center;
	-webkit-overflow-scrolling: touch;
}
.nav-strip::-webkit-scrollbar { display: none; }
.nav-strip {
	-ms-overflow-style: none;
	scrollbar-width: none;
	mask-image: linear-gradient(to right, transparent 0, black 1rem, black calc(100% - 2rem), transparent 100%);
	-webkit-mask-image: linear-gradient(to right, transparent 0, black 1rem, black calc(100% - 2rem), transparent 100%);
}
.nav-strip a {
	min-height: 44px;
	display: inline-flex;
	align-items: center;
	white-space: nowrap;
	padding: .45rem 1rem;
	border-radius: 50px;
	font-size: .85rem;
	font-weight: 500;
	color: var(--text-muted);
	transition: color var(--transition), background var(--transition), border-color var(--transition);
	border: 1px solid transparent;
}
.nav-strip a:hover {
	color: var(--brand-accent);
	background: var(--surface-alt);
	border-color: var(--border);
}

/* ── Main Layout ── */
.content-wrap {
	max-width: 1080px;
	margin: 0 auto;
	padding: var(--space-9) var(--space-7) var(--space-10);
}

/* ── Section Cards ── */
.section-card {
	scroll-margin-top: 4.5rem;
	margin-bottom: var(--space-7);
	border: 1px solid var(--border);
	border-radius: var(--radius-lg);
	background: var(--surface);
	box-shadow: var(--shadow-sm);
	overflow: hidden;
	transition: box-shadow var(--transition);
}
.section-card:hover { box-shadow: var(--shadow-md); }

.section-header {
	display: flex;
	align-items: center;
	gap: var(--space-4);
	padding: 1.25rem 1.5rem;
	cursor: pointer;
	user-select: none;
	background: var(--surface);
	transition: background var(--transition);
	border: none;
	width: 100%;
	text-align: left;
	font: inherit;
	color: inherit;
}
.section-header:hover { background: var(--surface-alt); }

.section-icon {
	width: 42px;
	height: 42px;
	border-radius: var(--radius);
	display: flex;
	align-items: center;
	justify-content: center;
	font-size: 1.3rem;
	flex-shrink: 0;
}
.icon-start    { background: #dbeafe; color:#1d4ed8; }
.icon-news     { background: #e0f2fe; color:#0369a1; }
.icon-ignite   { background: #fce7f3; color:#9d174d; }
.icon-train    { background: #fff7ed; color:#c2410c; }
.icon-dev      { background: #ede9fe; color:#5b21b6; }
.icon-admin    { background: #ecfdf5; color:#047857; }
.icon-security { background: #fee2e2; color:#b91c1c; }
.icon-comm     { background: #fefce8; color:#854d0e; }
.icon-webinar  { background: #eff6ff; color:#1d4ed8; }
.icon-proto    { background: #ccfbf1; color:#0f766e; }
.icon-oss      { background: #fef3c7; color:#92400e; }
.icon-samples  { background: #e0f2fe; color:#075985; }

.section-title {
	font-size: var(--text-lg);
	font-weight: 600;
	flex: 1;
}

.chevron {
	width: 20px;
	height: 20px;
	stroke: var(--text-muted);
	fill: none;
	transition: transform .25s ease;
	flex-shrink: 0;
}
.section-card.open .chevron { transform: rotate(180deg); }

.section-body {
	display: none;
	padding: 0 1.5rem 1.5rem;
}
.section-card.open .section-body { display: block; }

/* ── Sub-sections ── */
.sub-heading {
	font-size: var(--text-sm);
	font-weight: 700;
	text-transform: uppercase;
	letter-spacing: .06em;
	color: var(--text-muted);
	margin: 1.25rem 0 .5rem;
	padding-bottom: .35rem;
	border-bottom: 1px solid var(--border);
}
.sub-heading:first-child { margin-top: 0; }

/* ── Link Lists ── */
.link-list {
	list-style: none;
	display: flex;
	flex-direction: column;
	gap: .35rem;
}
.link-list li {
	padding: .5rem .75rem;
	border-radius: var(--radius);
	transition: background var(--transition);
	font-size: var(--text-base);
	line-height: 1.5;
}
.link-list li:hover { background: var(--surface-hover); }

.link-list a { font-weight: 500; }

.link-sep {
	color: var(--text-muted);
	margin: 0 .25rem;
	font-size: .85em;
}

/* ── Session Grid ── */
.session-grid {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
	gap: var(--space-3);
	list-style: none;
}
.session-grid li {
	border: 1px solid var(--border);
	border-radius: var(--radius);
	overflow: hidden;
	transition: border-color var(--transition), box-shadow var(--transition);
}
.session-grid li:hover {
	border-color: var(--brand-light);
	box-shadow: var(--shadow-md);
}
.session-grid a {
	display: flex;
	align-items: center;
	gap: var(--space-3);
	padding: .75rem 1rem;
	color: var(--text);
	font-weight: 500;
	font-size: .9rem;
	text-decoration: none;
	height: 100%;
}
.session-grid a:hover { color: var(--brand-accent); }

.session-badge {
	font-size: var(--text-xs);
	font-weight: 700;
	background: var(--surface-alt);
	color: var(--brand-accent);
	padding: .2rem .5rem;
	border-radius: 6px;
	flex-shrink: 0;
	letter-spacing: .02em;
}

/* ── Footer ── */
footer {
	background: var(--brand-deep);
	color: var(--text-on-dark);
	text-align: center;
	padding: 3rem 2rem 2rem;
}
footer h2 { font-size: var(--text-2xl); margin-bottom: var(--space-2); }
footer p { opacity: .7; font-size: .95rem; margin-bottom: 1rem; }
footer .btn {
	display: inline-block;
	padding: .65rem 1.8rem;
	border: 1.5px solid rgba(255,255,255,.3);
	border-radius: 50px;
	color: #fff;
	font-weight: 600;
	font-size: .9rem;
	transition: background var(--transition), border-color var(--transition);
}
footer .btn:hover { background: rgba(255,255,255,.1); border-color: rgba(255,255,255,.6); }
footer a { color: var(--brand-light); padding: .5rem .25rem; }
footer a:hover { color: #fff; }
footer .copyright {
	margin-top: 2.5rem;
	font-size: var(--text-sm);
	opacity: .45;
}

/* ── Responsive ── */
@media (max-width: 640px) {
	.hero { padding: 2rem 1.25rem 1.75rem; }
	.content-wrap { padding: var(--space-7) var(--space-4) var(--space-9); }
	.nav-strip { justify-content: flex-start; padding: .75rem 1rem; }
	.section-header { padding: 1rem 1.25rem; }
	.section-body { padding: 0 1.25rem 1.25rem; }
	.session-grid { grid-template-columns: 1fr; }
}

@media (min-width: 641px) and (max-width: 1024px) {
	.nav-strip { justify-content: flex-start; }
	.session-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ── Reduced Motion ── */
@media (prefers-reduced-motion: reduce) {
	html { scroll-behavior: auto; }
	*, *::before, *::after {
		animation-duration: 0.01ms !important;
		animation-iteration-count: 1 !important;
		transition-duration: 0.01ms !important;
	}
}