:root {
	--bg: #0b1020;
	--card: #0f1530;
	--text: #eff3fb;
	--muted: #b7c4e7;
	--primary: #2a67ff;
	--accent-1: #a257ff;
	--accent-2: #ff7a45;
	--ring: 0 0 0 4px color-mix(in srgb, var(--primary) 25%, transparent);
}

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

html, body {
	padding: 0;
	margin: 0;
	font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji";
	color: var(--text);
	background: radial-gradient(1200px 600px at 80% 10%, color-mix(in srgb, var(--accent-1) 20%, transparent), transparent 60%),
		radial-gradient(1200px 600px at 10% 20%, color-mix(in srgb, var(--primary) 25%, transparent), transparent 60%),
		radial-gradient(1200px 600px at 80% 80%, color-mix(in srgb, var(--accent-2) 25%, transparent), transparent 60%),
		var(--bg);
}

.container {
	width: min(1120px, 92vw);
	margin: 0 auto;
}

/* Header */
.site-header {
	position: sticky;
	top: 0;
	backdrop-filter: saturate(140%) blur(10px);
	background: color-mix(in srgb, var(--bg) 70%, transparent);
	border-bottom: 1px solid rgba(255,255,255,.06);
	z-index: 10;
}
.nav {
	display: flex;
	align-items: center;
	justify-content: space-between;
	padding: 14px 0;
}
.brand {
	display: flex;
	align-items: baseline;
	gap: 8px;
	font-weight: 800;
}
.brand .aws { letter-spacing: .5px; opacity: .9; }
.brand .divider { opacity: .35; }
.brand .summit { color: var(--primary); }
.brand .city { color: var(--accent-1); }
.brand .year { color: var(--accent-2); }
.links a {
	color: var(--text);
	text-decoration: none;
	opacity: .85;
	margin-left: 18px;
}
.links a:hover { opacity: 1; text-decoration: underline; }

/* Hero */
.hero {
	padding: 64px 0 24px;
}
.hero-inner {
	display: grid;
	grid-template-columns: 1.15fr .85fr;
	gap: 28px;
	align-items: center;
}
.eyebrow {
	color: var(--muted);
	font-weight: 600;
	text-transform: uppercase;
	letter-spacing: .12em;
	font-size: 12px;
	margin: 0 0 10px;
}
.hero h1 {
	font-size: clamp(36px, 5vw, 56px);
	line-height: 1.05;
	margin: 0 0 10px;
}
.hero .sub {
	color: var(--muted);
	font-size: 18px;
	line-height: 1.6;
	margin: 0 0 24px;
}
.cta-row { display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
	display: inline-block;
	padding: 12px 18px;
	border-radius: 10px;
	font-weight: 600;
	text-decoration: none;
	transition: .2s ease;
}
.btn.primary {
	background: linear-gradient(135deg, var(--primary), var(--accent-1));
	color: white;
	box-shadow: 0 10px 24px -12px rgba(42,103,255,.6);
}
.btn.primary:hover { transform: translateY(-1px); box-shadow: 0 16px 30px -12px rgba(42,103,255,.8); }
.btn.ghost {
	color: var(--text);
	border: 1px solid rgba(255,255,255,.15);
	background: rgba(255,255,255,.02);
}
.btn.ghost:hover { border-color: rgba(255,255,255,.35); background: rgba(255,255,255,.05); }
.hero-art {
	min-height: 260px;
	border-radius: 18px;
	background:
		radial-gradient(220px 120px at 70% 15%, color-mix(in srgb, var(--primary) 35%, transparent), transparent 60%),
		radial-gradient(320px 180px at 30% 80%, color-mix(in srgb, var(--accent-2) 35%, transparent), transparent 70%),
		radial-gradient(340px 220px at 90% 70%, color-mix(in srgb, var(--accent-1) 35%, transparent), transparent 60%),
		linear-gradient(135deg, #0d1228, #0b1020);
	border: 1px solid rgba(255,255,255,.08);
	box-shadow: inset 0 0 0 1px rgba(255,255,255,.04), 0 30px 80px -40px black;
}

/* Sections */
.section { padding: 64px 0; }
.section h2 { font-size: clamp(26px, 3.6vw, 36px); margin: 0 0 12px; }
.section p { color: var(--muted); line-height: 1.7; }
.grid-2 {
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: 40px;
}

.day-cards { display: grid; gap: 18px; }
.day {
	display: grid;
	grid-template-columns: 52px 1fr;
	gap: 16px;
	padding: 18px;
	background: color-mix(in srgb, var(--card) 92%, transparent);
	border: 1px solid rgba(255,255,255,.08);
	border-radius: 14px;
}
.day .num {
	font-weight: 800;
	font-size: 40px;
	line-height: 1;
	background: linear-gradient(180deg, var(--primary), var(--accent-1));
	-webkit-background-clip: text;
	background-clip: text;
	color: transparent;
}
.day h3 { margin: 0 0 8px; }
.timings, .bullets { margin: 0; padding-left: 18px; color: var(--muted); }
.timings li + li, .bullets li + li { margin-top: 6px; }

/* Speakers */
.speakers .muted { margin-top: 0; }
.speakers-card {
	margin-top: 18px;
	position: relative;
	border-radius: 16px;
	overflow: hidden;
	background: rgba(255,255,255,.02);
	border: 1px solid rgba(255,255,255,.08);
	min-height: 260px;
	display: grid;
	place-items: center;
}
.speakers-card img {
	display: block;
	width: 100%;
	height: auto;
}
.speakers-card.placeholder {
	background:
		radial-gradient(600px 280px at 75% 30%, color-mix(in srgb, var(--primary) 30%, transparent), transparent 60%),
		radial-gradient(700px 300px at 15% 70%, color-mix(in srgb, var(--accent-2) 30%, transparent), transparent 60%),
		color-mix(in srgb, var(--card) 94%, transparent);
}
.speakers-fallback {
	position: absolute;
	inset: 0;
	display: grid;
	place-content: center;
	text-align: center;
	padding: 24px;
	color: var(--muted);
	pointer-events: none;
}
.badge {
	display: inline-block;
	padding: 6px 10px;
	border-radius: 999px;
	background: rgba(255,255,255,.08);
	border: 1px solid rgba(255,255,255,.12);
	color: var(--text);
	font-size: 12px;
	font-weight: 700;
	margin-bottom: 10px;
}

/* FAQ / details */
.details {
	display: grid;
	grid-template-columns: repeat(4, 1fr);
	gap: 16px;
}
.details > div {
	padding: 16px;
	background: color-mix(in srgb, var(--card) 92%, transparent);
	border: 1px solid rgba(255,255,255,.08);
	border-radius: 12px;
}
.details h4 { margin: 0 0 6px; }
.details p { margin: 0; }

/* Footer */
.site-footer {
	padding: 36px 0 56px;
	border-top: 1px solid rgba(255,255,255,.08);
	background: linear-gradient(0deg, rgba(0,0,0,.25), transparent);
}
.site-footer a { color: var(--text); }
.site-footer .container { display: grid; gap: 6px; }

/* Responsive */
@media (max-width: 900px) {
	.hero-inner { grid-template-columns: 1fr; }
	.grid-2 { grid-template-columns: 1fr; }
	.details { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 560px) {
	.nav { padding: 12px 0; }
	.links { display: none; }
	.details { grid-template-columns: 1fr; }
}