:root {
  --orange: #E8650F;
  --orange-ink: #B84A00;
  --orange-soft: #FDEEE3;
  --ink: #16181D;
  --ink-2: #3B3F48;
  --muted: #646a75;
  --line: #E4E6EA;
  --bg: #FFFFFF;
  --bg-alt: #F6F6F4;
  --hero-bg: #121418;
  --hero-ink: #F4F2EE;
  --hero-muted: #B8B5AE;
  --radius: 14px;
  --font-head: "Space Grotesk", system-ui, sans-serif;
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --blk1: #E8650F;
  --blk2: #2A6FDB;
  --blk3: #0F9D7A;
  --blk4: #8A4FD8;
  --blk0: #6B7280;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *{ animation: none !important; transition: none !important; } }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 400 16px/1.6 var(--font-body);
  -webkit-font-smoothing: antialiased; overflow-x: hidden;
}
h1, h2, h3 { font-family: var(--font-head); line-height: 1.12; letter-spacing: -0.02em; margin: 0; }
h2 { font-size: clamp(1.9rem, 4vw, 2.75rem); }
a { color: inherit; }
img { max-width: 100%; display: block; }
svg { flex: none; }
:focus-visible { outline: 3px solid var(--orange); outline-offset: 3px; border-radius: 6px; }

.wrap { width: 100%; max-width: 1140px; margin: 0 auto; padding: 0 16px; }
@media (min-width: 720px) { .wrap { padding: 0 32px; } }

.skip { position: absolute; left: -999px; top: 8px; background: var(--ink); color: #fff; padding: 8px 14px; z-index: 100; border-radius: 8px; }
.skip:focus { left: 8px; }

.eyebrow { font: 600 .78rem/1.3 var(--font-body); letter-spacing: .14em; text-transform: uppercase; color: var(--orange-ink); margin: 0 0 12px; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,.92); backdrop-filter: saturate(1.4) blur(10px); border-bottom: 1px solid var(--line); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.brand img { height: 44px; width: auto; }
.brand-sep { width: 1px; height: 26px; background: var(--line); }
.brand-nids { font: 700 1.1rem var(--font-head); letter-spacing: .06em; }
.nav { display: flex; gap: 4px; }
.nav a { text-decoration: none; font-weight: 500; font-size: .92rem; padding: 8px 12px; border-radius: 999px; color: var(--ink-2); }
.nav a:hover { background: var(--bg-alt); color: var(--ink); }
.nav a.nav-cta { background: var(--orange); color: #fff; font-weight: 600; }
.nav a.nav-cta:hover { background: #d45708; color: #fff; }
@media (max-width: 560px) { .nav a:not(:first-child):not(.nav-cta) { display: none; } .brand img { height: 38px; } }

/* Hero */
.hero { position: relative; overflow: hidden; background: var(--hero-bg); color: var(--hero-ink); }
.hero::after { content: ""; position: absolute; inset: auto -20% -60% 40%; height: 120%; background: radial-gradient(closest-side, rgba(232,101,15,.35), transparent); pointer-events: none; }
.hero-net { position: absolute; inset: 0; width: 100%; height: 100%; opacity: .55; }
.hero-net line { stroke: rgba(255,255,255,.12); stroke-width: 1; }
.hero-net circle { fill: rgba(255,255,255,.35); }
.hero-net circle.hot { fill: var(--orange); }
.hero-inner { position: relative; z-index: 1; padding-top: clamp(56px, 10vw, 112px); padding-bottom: clamp(56px, 9vw, 104px); }
.hero .eyebrow { color: #FFB27A; }
.hero h1 { font-size: clamp(2.3rem, 6.4vw, 4.6rem); max-width: 16ch; }
.hero h1 span { color: var(--orange); display: block; }
.tagline { font-size: clamp(1.05rem, 2.2vw, 1.35rem); color: var(--hero-muted); margin: 18px 0 32px; }

.facts { list-style: none; padding: 0; margin: 0 0 32px; display: flex; flex-wrap: wrap; gap: 10px 28px; }
.facts li { display: flex; align-items: center; gap: 10px; color: var(--hero-muted); }
.facts strong { color: var(--hero-ink); font-weight: 600; }
.facts svg, .btn svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.facts svg { color: var(--orange); }

.countdown { display: flex; gap: 10px; margin-bottom: 36px; }
.countdown div { min-width: 74px; padding: 12px 10px; text-align: center; border: 1px solid rgba(255,255,255,.14); border-radius: 12px; background: rgba(255,255,255,.04); }
.countdown span { display: block; font: 600 clamp(1.5rem, 4vw, 2rem)/1 var(--font-head); font-variant-numeric: tabular-nums; }
.countdown small { font-size: .72rem; text-transform: uppercase; letter-spacing: .1em; color: var(--hero-muted); }
.countdown.done { display: none; }

.cta { display: flex; flex-wrap: wrap; gap: 12px; }
.btn { display: inline-flex; align-items: center; gap: 10px; padding: 13px 22px; border-radius: 999px; font: 600 .98rem var(--font-body); text-decoration: none; border: 1.5px solid transparent; cursor: pointer; transition: transform .15s, background .15s; }
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--orange); color: #fff; }
.btn-primary:hover { background: #d45708; }
.btn-ghost { border-color: rgba(255,255,255,.35); color: var(--hero-ink); background: transparent; }
.btn-ghost:hover { background: rgba(255,255,255,.08); }
.cal { position: relative; }
.cal-menu { position: absolute; top: calc(100% + 8px); left: 0; min-width: 230px; background: #fff; color: var(--ink); border-radius: 12px; box-shadow: 0 12px 40px rgba(0,0,0,.25); padding: 6px; z-index: 5; }
.cal-menu a { display: block; padding: 10px 14px; border-radius: 8px; text-decoration: none; font-weight: 500; }
.cal-menu a:hover { background: var(--orange-soft); }

/* Stats */
.stats { background: var(--orange); color: #fff; }
.stats-grid { display: grid; grid-template-columns: repeat(2, 1fr); }
.stats-grid > div { box-shadow: inset 1px 1px 0 rgba(255,255,255,.22); padding: 22px 12px; display: flex; flex-direction: column; align-items: center; text-align: center; }
.stats strong { font: 700 2.2rem/1 var(--font-head); }
.stats span { font-size: .9rem; margin-top: 6px; opacity: .95; }
@media (min-width: 720px) { .stats-grid { grid-template-columns: repeat(4, 1fr); } }

/* About */
.about { padding: clamp(56px, 8vw, 96px) 0 0; }
.about-grid { display: grid; gap: 24px; }
.about h2 { font-size: clamp(1.6rem, 3.4vw, 2.3rem); }
.about p { color: var(--ink-2); margin: 0 0 14px; font-size: 1.05rem; }
@media (min-width: 880px) { .about-grid { grid-template-columns: 1fr 1.2fr; gap: 64px; } }

/* Sections */
.section { padding: clamp(56px, 8vw, 96px) 0; }
.section-alt { background: var(--bg-alt); }
.section-head { margin-bottom: 36px; }

/* Timeline */
.timeline { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.tl-item { display: grid; grid-template-columns: 1fr; gap: 6px 32px; padding: 22px 0; border-bottom: 1px solid var(--line); }
@media (min-width: 720px) { .tl-item { grid-template-columns: 150px 1fr; } }
.tl-time { font: 600 .95rem var(--font-head); color: var(--muted); font-variant-numeric: tabular-nums; padding-top: 2px; }
.tl-title { font: 600 1.18rem/1.3 var(--font-head); margin: 0 0 4px; display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.tl-who { margin: 0; font-weight: 600; }
.tl-role { margin: 0; color: var(--muted); font-size: .92rem; }
.tl-desc { margin: 4px 0 0; color: var(--ink-2); font-size: .95rem; }
.tl-block .tl-title { font-size: 1.32rem; }
.tl-chip { font: 700 .7rem var(--font-body); letter-spacing: .1em; text-transform: uppercase; padding: 4px 9px; border-radius: 999px; color: #fff; background: var(--c, var(--orange)); }
.tl-speakers { display: grid; gap: 14px; margin-top: 14px; }
@media (min-width: 880px) { .tl-speakers { grid-template-columns: repeat(2, 1fr); } }
.tl-speaker { border-left: 3px solid var(--c, var(--orange)); padding: 4px 0 4px 14px; }
.tl-break { background: var(--orange-soft); border-bottom-color: #f6d6be; }
.tl-break .tl-title { color: var(--orange-ink); font-size: 1rem; letter-spacing: .06em; text-transform: uppercase; }
.tl-break .tl-time { color: var(--orange-ink); }
.tl-break, .tl-item { padding-left: 0; padding-right: 0; }
@media (max-width: 719px) { .tl-break { margin: 0 -16px; padding-left: 16px; padding-right: 16px; } }
@media (min-width: 720px) { .tl-break { padding-left: 16px; } }

/* Speakers */
.filters { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 28px; }
.filters button { font: 500 .88rem var(--font-body); padding: 8px 14px; border-radius: 999px; border: 1px solid var(--line); background: #fff; color: var(--ink-2); cursor: pointer; }
.filters button[aria-pressed="true"] { background: var(--ink); color: #fff; border-color: var(--ink); }
.speakers { display: grid; gap: 16px; grid-template-columns: 1fr; }
@media (min-width: 640px) { .speakers { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 980px) { .speakers { grid-template-columns: repeat(3, 1fr); } }
.card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; display: flex; flex-direction: column; gap: 12px; }
.card[hidden] { display: none; }
.card-top { display: flex; gap: 14px; align-items: center; }
.avatar { position: relative; overflow: hidden; width: 64px; height: 64px; border-radius: 50%; display: grid; place-items: center; flex: none; font: 600 1.05rem var(--font-head); color: #fff; background: var(--c, var(--orange)); }
.avatar img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.card h3 { font-size: 1.08rem; }
.card .role { margin: 2px 0 0; color: var(--muted); font-size: .86rem; line-height: 1.4; }
.card .topic { margin: 0; color: var(--ink-2); font-size: .93rem; }
.card .tag { align-self: flex-start; font: 600 .7rem var(--font-body); letter-spacing: .08em; text-transform: uppercase; color: var(--c); background: color-mix(in srgb, var(--c) 12%, white); padding: 4px 9px; border-radius: 999px; }
.card details { border-top: 1px solid var(--line); padding-top: 10px; margin-top: auto; }
.card summary { cursor: pointer; font-weight: 600; font-size: .9rem; color: var(--orange-ink); list-style: none; display: flex; align-items: center; gap: 6px; }
.card summary::-webkit-details-marker { display: none; }
.card summary::after { content: "+"; font-size: 1.1rem; line-height: 1; }
.card details[open] summary::after { content: "–"; }
.card details p { font-size: .9rem; color: var(--ink-2); margin: 10px 0; }
.card details a { font-size: .88rem; font-weight: 600; color: var(--orange-ink); word-break: break-word; }

/* Venue */
.venue { display: grid; gap: 32px; align-items: center; }
@media (min-width: 880px) { .venue { grid-template-columns: 1fr 1.4fr; gap: 56px; } }
.venue-name { font: 600 1.3rem/1.35 var(--font-head); margin: 20px 0 6px; }
.venue-addr { margin: 0; font-size: 1.05rem; }
.venue-meta { color: var(--muted); margin: 4px 0 24px; }
.map { border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); aspect-ratio: 4 / 3; background: var(--bg-alt); }
.map iframe { width: 100%; height: 100%; border: 0; display: block; }

/* Footer */
.footer { background: var(--hero-bg); color: var(--hero-muted); padding: 48px 0 24px; font-size: .92rem; }
.footer-inner { display: grid; gap: 32px; }
.footer strong { color: var(--hero-ink); }
.footer-logo { background: #fff; padding: 8px 12px; border-radius: 8px; height: auto; margin-bottom: 14px; box-sizing: content-box; }
.copy { margin-top: 32px; padding-top: 18px; border-top: 1px solid rgba(255,255,255,.1); font-size: .8rem; }