:root{
  --ink:#172033;
  --muted:#667085;
  --line:#e6e8ec;
  --paper:#fff;
  --soft:#f6f7f9;
  --brand:#1e56d9;
  --brand2:#6838d1;
  --accent:#f3a51b;
  --dark:#101828;
  --max:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--paper);line-height:1.55}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{width:min(var(--max),calc(100% - 40px));margin:auto}
.eyebrow{text-transform:uppercase;letter-spacing:.12em;font-weight:800;font-size:.78rem;color:var(--brand)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;border-radius:999px;padding:.9rem 1.25rem;font-weight:800;border:1px solid transparent;cursor:pointer;transition:.2s;background:var(--brand);color:white}
.btn:hover{transform:translateY(-1px);box-shadow:0 10px 24px rgba(30,86,217,.18)}
.btn.secondary{background:white;color:var(--ink);border-color:var(--line)}
.btn.dark{background:var(--dark)}
.btn.small{padding:.55rem .85rem;font-size:.9rem}
.topbar{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav{height:72px;display:flex;align-items:center;gap:22px}
.brand{font-size:1.15rem;font-weight:900;white-space:nowrap}.brand span{color:var(--brand)}
.navlinks{display:flex;gap:20px;align-items:center;margin-left:auto;font-weight:700;font-size:.94rem}.navlinks a:hover{color:var(--brand)}
.menu-btn{display:none;margin-left:auto;border:0;background:transparent;font-size:1.5rem}
.hero{padding:82px 0 68px;background:radial-gradient(circle at 85% 20%,rgba(104,56,209,.12),transparent 24%),radial-gradient(circle at 12% 65%,rgba(30,86,217,.12),transparent 25%),linear-gradient(#fff,#fafbff)}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center}
h1{font-size:clamp(3rem,7vw,6.3rem);line-height:.94;letter-spacing:-.055em;margin:.45rem 0 1.25rem;max-width:850px}
.hero h1 .gradient{background:linear-gradient(90deg,var(--brand),var(--brand2));-webkit-background-clip:text;color:transparent}
.lede{font-size:1.22rem;color:var(--muted);max-width:720px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
.video-stage{aspect-ratio:16/10;border-radius:28px;background:linear-gradient(145deg,#182238,#2d3b62);position:relative;overflow:hidden;box-shadow:0 28px 70px rgba(16,24,40,.2)}
.video-stage:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 70% 20%,rgba(243,165,27,.6),transparent 23%),radial-gradient(circle at 18% 80%,rgba(30,86,217,.8),transparent 26%)}
.stage-copy{position:absolute;inset:auto 28px 28px;z-index:2;color:#fff}.stage-copy strong{display:block;font-size:1.8rem;line-height:1.05}.play{width:70px;height:70px;border-radius:50%;background:#fff;color:var(--dark);display:grid;place-items:center;font-size:1.5rem;margin-bottom:18px}
.quicknav{padding:22px 0;border-bottom:1px solid var(--line);background:white}.quick-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}.quick-card{padding:18px;border:1px solid var(--line);border-radius:18px;font-weight:800;background:white}.quick-card small{display:block;color:var(--muted);font-weight:600;margin-top:3px}.quick-card:hover{border-color:#b7c5ef;box-shadow:0 8px 20px rgba(16,24,40,.05)}
.section{padding:84px 0}.section.soft{background:var(--soft)}.section.dark{background:var(--dark);color:white}.section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:30px}.section h2{font-size:clamp(2.15rem,4vw,4rem);line-height:1;letter-spacing:-.04em;margin:.35rem 0}.section-copy{max-width:720px;color:var(--muted);font-size:1.08rem}.dark .section-copy{color:#c7d0e0}
.track-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.track-card{min-height:220px;padding:26px;border-radius:24px;background:white;border:1px solid var(--line);display:flex;flex-direction:column;justify-content:space-between;transition:.2s}.track-card:hover{transform:translateY(-3px);box-shadow:0 18px 36px rgba(16,24,40,.08)}.track-icon{font-size:1.8rem}.track-card h3{font-size:1.5rem;margin:.8rem 0 .35rem}.track-card p{color:var(--muted);margin:0}.track-link{font-weight:800;color:var(--brand);margin-top:24px}
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.session-card{background:#fff;border:1px solid var(--line);border-radius:22px;overflow:hidden;display:flex;flex-direction:column;min-height:100%}.session-thumb{aspect-ratio:16/9;background:linear-gradient(145deg,#15213c,#304b93);position:relative;padding:18px;color:white}.session-thumb.architecture{background:linear-gradient(145deg,#182238,#5b3caf)}.session-thumb.business{background:linear-gradient(145deg,#4b2d16,#b06920)}.session-thumb.ai{background:linear-gradient(145deg,#123a36,#1f8177)}.session-thumb.developer{background:linear-gradient(145deg,#1c1c26,#515166)}.session-thumb.buildthis{background:linear-gradient(145deg,#31214e,#8e55d8)}.session-thumb .type{display:inline-block;padding:.38rem .62rem;border-radius:999px;background:rgba(255,255,255,.13);font-size:.75rem;font-weight:800}.session-body{padding:20px;display:flex;flex-direction:column;flex:1}.session-body h3{font-size:1.22rem;line-height:1.2;margin:0 0 10px}.meta{display:flex;flex-wrap:wrap;gap:7px;color:var(--muted);font-size:.82rem;margin-bottom:12px}.session-body p{color:var(--muted);font-size:.94rem;flex:1}.session-actions{display:flex;gap:8px;margin-top:14px}
.conference-paths{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.path{border:1px solid rgba(255,255,255,.14);border-radius:22px;padding:24px;background:rgba(255,255,255,.04)}.path h3{font-size:1.25rem;margin:.6rem 0}.path p{color:#c7d0e0}
.callout{padding:42px;border-radius:30px;background:linear-gradient(135deg,#edf3ff,#f6efff);display:grid;grid-template-columns:1fr auto;gap:30px;align-items:center}.callout h3{font-size:2rem;line-height:1.05;margin:0 0 8px}.callout p{margin:0;color:var(--muted)}
.filters{display:grid;grid-template-columns:2fr repeat(4,1fr);gap:10px;margin:24px 0}.filters input,.filters select{width:100%;padding:13px 14px;border:1px solid var(--line);border-radius:12px;background:white;font:inherit}.count{font-weight:800;margin-bottom:16px}
.page-hero{padding:64px 0 36px;background:linear-gradient(180deg,#f9fbff,#fff)}.page-hero h1{font-size:clamp(2.8rem,6vw,5rem);margin-bottom:16px}.page-hero p{max-width:760px;color:var(--muted);font-size:1.15rem}
.session-page{display:grid;grid-template-columns:1.15fr .85fr;gap:44px;align-items:start}.player{aspect-ratio:16/9;background:#121827;border-radius:24px;color:#fff;display:grid;place-items:center;text-align:center;padding:28px}.player strong{display:block;font-size:1.6rem}.detail-box{border:1px solid var(--line);border-radius:20px;padding:22px;background:white;position:sticky;top:96px}.detail-box dl{display:grid;grid-template-columns:110px 1fr;gap:10px;margin:18px 0}.detail-box dt{color:var(--muted)}.detail-box dd{margin:0;font-weight:700}
.saved-empty{padding:44px;border:1px dashed #bdc5d1;border-radius:20px;text-align:center;color:var(--muted)}
.faq{max-width:900px}.faq details{border-top:1px solid var(--line);padding:20px 0}.faq summary{font-size:1.08rem;font-weight:800;cursor:pointer}.faq p{color:var(--muted)}
.footer{padding:48px 0;background:#0c1220;color:#dfe6f4}.footer-grid{display:grid;grid-template-columns:2fr repeat(3,1fr);gap:30px}.footer h4{margin-top:0}.footer a{display:block;color:#aebad0;margin:.45rem 0}.footer a:hover{color:white}.fine{border-top:1px solid rgba(255,255,255,.12);margin-top:34px;padding-top:20px;color:#8290a8;font-size:.86rem}
.notice{padding:12px 14px;border-radius:12px;background:#fff8e8;border:1px solid #f6dda2;color:#79550c;font-size:.9rem}
@media(max-width:960px){.navlinks{display:none;position:absolute;top:72px;left:0;right:0;background:white;padding:20px;box-shadow:0 14px 30px rgba(16,24,40,.12);flex-direction:column;align-items:flex-start}.navlinks.open{display:flex}.menu-btn{display:block}.hero-grid,.session-page{grid-template-columns:1fr}.quick-grid{grid-template-columns:repeat(2,1fr)}.track-grid,.card-grid{grid-template-columns:repeat(2,1fr)}.conference-paths{grid-template-columns:repeat(2,1fr)}.filters{grid-template-columns:1fr 1fr}.callout{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:620px){.container{width:min(100% - 26px,var(--max))}.hero{padding-top:52px}.nav{height:64px}.navlinks{top:64px}h1{font-size:3.3rem}.quick-grid,.track-grid,.card-grid,.conference-paths,.filters,.footer-grid{grid-template-columns:1fr}.section{padding:62px 0}.section-head{display:block}.video-stage{border-radius:20px}.callout{padding:28px}.session-actions{flex-direction:column}}