/* ============ TOKENS ============ */
:root {
  --bg: #04060c;
  --bg-elev: #0a0f1c;
  --panel: #0d1424;
  --panel-2: #111a2e;
  --panel-3: #16203a;
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.16);
  --ink: #f3f6fc;
  --ink-2: #c4ccdc;
  --ink-3: #8892a8;
  --ink-4: #5b6478;
  --blue: #2e6fdb;
  --blue-2: #4f8aff;
  --blue-deep: #1d4ea3;
  --cyan: #3fb6ff;
  --teal: #6ee7e0;
  --warn: #ffb547;
  --display: "Inter Tight", "Inter", system-ui, sans-serif;
  --body: "Inter", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", monospace;
  --container: 1320px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--body);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
::selection { background: var(--blue); color: white; }

a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
img { display: block; max-width: 100%; }

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 32px;
}

/* ============ COMMON ============ */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 6px 12px 6px 8px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-2);
  background: rgba(13, 20, 36, 0.6);
}
.eyebrow-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 0 4px rgba(110,231,224,0.18), 0 0 14px rgba(110,231,224,0.7);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse {
  0%,100% { opacity: 1; transform: scale(1); }
  50% { opacity: .55; transform: scale(0.92); }
}

.btn-primary {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 22px;
  border-radius: 10px;
  background: linear-gradient(180deg, var(--blue-2), var(--blue));
  color: white;
  font-weight: 600;
  font-size: 15px;
  letter-spacing: -0.005em;
  box-shadow: 0 1px 0 rgba(255,255,255,0.18) inset, 0 16px 38px -16px rgba(46,111,219,0.7);
  transition: transform .12s ease, box-shadow .12s ease;
}
.btn-primary:hover { transform: translateY(-1px); }
.btn-ghost {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 22px;
  border-radius: 10px;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--line-strong);
  color: var(--ink);
  font-weight: 500;
  font-size: 15px;
  transition: background .15s ease, border-color .15s ease;
}
.btn-ghost:hover { background: rgba(255,255,255,0.06); border-color: rgba(255,255,255,0.28); }

.section {
  position: relative;
  padding: 120px 0;
  border-bottom: 1px solid var(--line);
}
.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 40px;
  margin-bottom: 56px;
}
.section-head .left { max-width: 720px; }
.section-num {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 16px;
  display: flex; align-items: center; gap: 10px;
}
.section-num::before {
  content: ""; width: 28px; height: 1px; background: var(--cyan);
}
.section-title {
  font-family: var(--display);
  font-weight: 700;
  font-size: clamp(36px, 4.4vw, 64px);
  letter-spacing: -0.03em;
  line-height: 1.02;
  margin: 0 0 18px;
}
.section-sub {
  color: var(--ink-3);
  font-size: 17px;
  max-width: 620px;
  margin: 0;
}
.section-head .right {
  display: flex; gap: 10px; align-items: center;
  flex-shrink: 0;
}

.inline-link {
  color: var(--blue);
  font-weight: 500;
  border-bottom: 1px solid rgba(46,111,219,0.4);
  transition: border-color .15s ease;
}
.inline-link:hover { border-color: var(--blue); }

/* ============ LIGHT SECTION VARIANT ============ */
.section.light {
  --bg-local: #f6f7fb;
  --surface: #ffffff;
  --line-local: rgba(7, 14, 30, 0.08);
  --line-local-strong: rgba(7, 14, 30, 0.16);
  --ink-local: #0a1226;
  --ink-local-2: #2c3650;
  --ink-local-3: #5a6478;
  --ink-local-4: #8b94a8;

  background: var(--bg-local);
  color: var(--ink-local);
  border-bottom: 1px solid var(--line-local);
}
.section.light .section-title { color: var(--ink-local); }
.section.light .section-sub { color: var(--ink-local-3); }
.section.light .section-num { color: var(--blue); }
.section.light .section-num::before { background: var(--blue); }
.section.light .inline-link { color: var(--blue); border-bottom-color: rgba(46,111,219,0.45); }
.section.light .btn-ghost {
  background: transparent;
  border-color: var(--line-local-strong);
  color: var(--ink-local);
}
.section.light .btn-ghost:hover {
  background: rgba(10,18,38,0.04);
  border-color: rgba(10,18,38,0.28);
}
.section.light a { color: var(--ink-local); }

/* ============ NAV ============ */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: rgba(4, 6, 12, 0.78);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 14px 32px;
  max-width: var(--container);
  margin: 0 auto;
}
.brand { display: flex; align-items: center; gap: 14px; padding-right: 20px; }
.brand-logo {
  height: 44px; width: auto; max-width: 176px; display: block; object-fit: contain;
}
.nav-links { display: flex; gap: 2px; margin-left: auto; }
.nav-link {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 14px; border-radius: 8px;
  font-size: 13.5px; color: var(--ink-2); font-weight: 500;
  transition: color .15s ease, background .15s ease;
}
.nav-link:hover { color: var(--ink); background: rgba(255,255,255,0.04); }
.nav-link.active { color: var(--ink); }
.nav-cta {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 16px 9px 18px; border-radius: 999px;
  background: linear-gradient(180deg, var(--blue-2), var(--blue));
  color: white; font-weight: 600; font-size: 13.5px;
  box-shadow: 0 1px 0 rgba(255,255,255,0.18) inset, 0 6px 24px -8px rgba(46,111,219,0.55);
  transition: transform .12s ease; white-space: nowrap;
}
.nav-cta:hover { transform: translateY(-1px); }
.nav-cta svg { width: 14px; height: 14px; }

/* ============ HERO ============ */
.hero { position: relative; overflow: hidden; border-bottom: 1px solid var(--line); }
.hero-b {
  padding: 130px 0 120px; position: relative;
  text-align: center; min-height: 780px;
  display: flex; align-items: center;
}
.hero-b .container { position: relative; z-index: 3; width: 100%; }
.hero-b-bg {
  position: absolute; inset: 0;
  pointer-events: none; overflow: hidden; z-index: 1;
}
.hero-b-bg::after {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(ellipse 60% 50% at 50% 100%, rgba(4,6,12,0.9), transparent 70%);
}
/* Rotating mesh gradient */
.hero-mesh {
  position: absolute; inset: -60%;
  background: conic-gradient(from 0deg at 50% 50%,
    transparent 0deg,
    rgba(46,111,219,0.10) 55deg,
    transparent 110deg,
    rgba(110,231,224,0.07) 170deg,
    transparent 225deg,
    rgba(79,138,255,0.09) 285deg,
    transparent 360deg
  );
  animation: mesh-spin 28s linear infinite;
  pointer-events: none; z-index: 0;
}
@keyframes mesh-spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

/* Sweeping aurora bar */
.hero-aurora {
  position: absolute; top: 0; left: -100%; width: 200%; height: 100%;
  background: linear-gradient(105deg,
    transparent 0%,
    rgba(110,231,224,0.04) 28%,
    rgba(79,138,255,0.10) 48%,
    rgba(110,231,224,0.05) 68%,
    transparent 100%
  );
  animation: aurora-sweep 9s ease-in-out infinite;
  pointer-events: none; z-index: 1;
}
@keyframes aurora-sweep {
  0%   { transform: translateX(0)     skewX(-6deg); opacity: 0.6; }
  50%  { transform: translateX(55%)   skewX(-6deg); opacity: 1; }
  100% { transform: translateX(0)     skewX(-6deg); opacity: 0.6; }
}

.blob {
  position: absolute; border-radius: 50%;
  mix-blend-mode: screen; filter: blur(80px); opacity: 0.75;
  animation: drift 16s ease-in-out infinite;
}
.blob.b1 { width: 860px; height: 860px; left: 2%; top: 4%;  background: radial-gradient(circle, rgba(46,111,219,0.9) 0%, rgba(46,111,219,0) 65%); animation-duration: 16s; }
.blob.b2 { width: 760px; height: 760px; right: 4%; top: 16%; background: radial-gradient(circle, rgba(63,182,255,0.75) 0%, rgba(63,182,255,0) 65%); animation-delay: -5s; animation-duration: 14s; }
.blob.b3 { width: 640px; height: 640px; left: 28%; bottom: 2%; background: radial-gradient(circle, rgba(110,231,224,0.55) 0%, rgba(110,231,224,0) 65%); animation-delay: -9s; animation-duration: 18s; }
.blob.b4 { width: 580px; height: 580px; right: 18%; bottom: 6%; background: radial-gradient(circle, rgba(29,78,163,0.85) 0%, rgba(29,78,163,0) 65%); animation-delay: -2s; animation-duration: 13s; }
.blob.b5 { width: 500px; height: 500px; left: 50%; top: 10%;  background: radial-gradient(circle, rgba(110,231,224,0.45) 0%, rgba(110,231,224,0) 65%); animation-delay: -11s; animation-duration: 20s; }
@keyframes drift {
  0%,100% { transform: translate(0,0)        scale(1); }
  25%      { transform: translate(70px,-50px) scale(1.10); }
  50%      { transform: translate(-30px,40px) scale(0.93); }
  75%      { transform: translate(50px, 20px) scale(1.05); }
}
.hero-b-grid-overlay {
  position: absolute; inset: 0;
  background-image: linear-gradient(to right, rgba(255,255,255,0.04) 1px, transparent 1px), linear-gradient(to bottom, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, black 40%, transparent 90%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, black 40%, transparent 90%);
}
.hero-b .eyebrow { margin: 0 auto 32px; }
.hero-b-title {
  margin: 0 0 8px;
}
.hero-title-img {
  width: 860px;
  max-width: 90%;
  height: auto;
  display: block;
  margin: 0 auto;
}
.hero-b-sub {
  font-family: var(--display); font-weight: 500;
  font-size: clamp(20px, 2vw, 26px); color: var(--ink-2);
  letter-spacing: -0.01em; margin: 20px 0 14px;
}
.hero-b-meta {
  font-family: var(--mono); font-size: 12.5px;
  letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--ink); margin-bottom: 44px;
  display: inline-flex; align-items: center; gap: 18px;
  padding: 10px 18px; border: 1px solid var(--line-strong);
  border-radius: 999px; background: rgba(8, 12, 22, 0.55);
  backdrop-filter: blur(8px);
}
.hero-b-meta .dot { width: 4px; height: 4px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 8px var(--cyan); }
.hero-b-ctas { display: flex; gap: 12px; justify-content: center; }

/* ============ SPEAKERS ============ */
.speakers.light { background: #ffffff; }
.speakers-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 1px; background: rgba(7,14,30,0.08);
  border: 1px solid rgba(7,14,30,0.08);
  border-radius: 20px; overflow: hidden;
}
.speaker {
  background: #ffffff; padding: 24px;
  transition: background .2s ease; cursor: pointer; position: relative;
}
.speaker:hover { background: #fafbfd; }
.speaker-photo {
  position: relative; aspect-ratio: 1;
  border-radius: 12px; overflow: hidden; margin-bottom: 18px;
  background: linear-gradient(135deg, #eef1f8, #e2e7f1);
}
.speaker-photo img { width: 100%; height: 100%; object-fit: cover; }
.speaker-photo .ph {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--display); font-weight: 700; font-size: 56px;
  letter-spacing: -0.04em; color: #ffffff;
  background:
    radial-gradient(circle at 30% 20%, rgba(63,182,255,0.55), transparent 55%),
    radial-gradient(circle at 70% 80%, rgba(46,111,219,0.7), transparent 60%),
    linear-gradient(135deg, #2e6fdb, #1d4ea3);
}
.speaker-photo .tag {
  position: absolute; top: 10px; left: 10px;
  font-family: var(--mono); font-size: 9.5px;
  letter-spacing: 0.14em; text-transform: uppercase;
  background: rgba(255,255,255,0.92); border: 1px solid rgba(7,14,30,0.10);
  color: #2c3650; padding: 4px 8px; border-radius: 999px;
}
.speaker-photo .tag.keynote { color: #0c7d77; border-color: rgba(12,125,119,0.25); background: rgba(231,250,248,0.95); }
.speaker-name { font-family: var(--display); font-weight: 600; font-size: 19px; letter-spacing: -0.01em; margin: 0 0 4px; color: #0a1226; }
.speaker-role { color: #5a6478; font-size: 13.5px; line-height: 1.4; }
.speaker-role .co { color: #2c3650; }
.speaker-arrow { position: absolute; bottom: 24px; right: 24px; opacity: 0; transition: opacity .2s ease, transform .2s ease; color: var(--blue); font-size: 16px; }
.speaker:hover .speaker-arrow { opacity: 1; transform: translateX(2px); }
.speakers-more { margin-top: 32px; text-align: center; color: #5a6478; font-family: var(--mono); font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase; }

/* ============ PROGRAM ============ */
.program.light { background: #f6f7fb; }
.program-layout { display: grid; grid-template-columns: 280px 1fr; gap: 64px; align-items: start; }
.tracks-rail { position: sticky; top: 100px; display: flex; flex-direction: column; gap: 4px; }
.track-btn {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 16px 18px; border-radius: 12px; border: 1px solid transparent;
  background: transparent; text-align: left; transition: all .15s ease; color: #5a6478;
}
.track-btn:hover { background: rgba(10,18,38,0.04); color: #0a1226; }
.track-btn.active { background: rgba(46,111,219,0.08); border-color: rgba(46,111,219,0.28); color: #0a1226; }
.track-btn .lbl { font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.14em; text-transform: uppercase; color: #8b94a8; margin-bottom: 4px; display: block; }
.track-btn.active .lbl { color: var(--blue); }
.track-btn .name { font-family: var(--display); font-weight: 600; font-size: 15px; letter-spacing: -0.01em; }
.track-btn .count { font-family: var(--mono); font-size: 11px; color: #8b94a8; }

.track-panel { display: none; }
.track-panel.is-active {
  display: block;
  border: 1px solid rgba(7,14,30,0.08);
  border-radius: 18px; background: #ffffff;
  box-shadow: 0 30px 80px -40px rgba(10, 18, 38, 0.18);
  overflow: hidden;
}
.session {
  display: grid; grid-template-columns: 140px 1fr 180px;
  gap: 28px; padding: 24px 28px;
  border-bottom: 1px solid rgba(7,14,30,0.06);
  align-items: start; transition: background .15s ease;
}
.session:last-child { border-bottom: 0; }
.session:hover { background: rgba(7,14,30,0.02); }
.session.is-break { background: rgba(7,14,30,0.015); }
.session.is-break .session-title { font-weight: 500; color: #5a6478; font-size: 16px; }
.session-time { font-family: var(--mono); font-size: 13px; color: #0a1226; letter-spacing: -0.005em; font-weight: 500; padding-top: 2px; }
.session-time .dur { display: block; font-size: 11px; color: #8b94a8; margin-top: 4px; }
.session-tag {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--mono); font-size: 10px; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--cyan); margin-bottom: 8px;
}
.session-tag.keynote { color: var(--teal); }
.session-tag.break { color: #8b94a8; }
.session-tag.panel { color: var(--warn); }
.session-tag::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.session-title { font-family: var(--display); font-weight: 600; font-size: 19px; letter-spacing: -0.015em; margin: 0 0 6px; color: #0a1226; line-height: 1.25; }
.session-desc { color: #5a6478; font-size: 14px; line-height: 1.5; margin: 0; }
.session-people { display: flex; flex-direction: column; gap: 8px; font-size: 13px; color: #2c3650; }
.session-people .pname { color: #0a1226; font-weight: 500; }
.session-people .prole { color: #8b94a8; font-size: 12px; }

/* ============ TICKETS ============ */
.tickets.light { background: #ffffff; }
.tickets-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; align-items: stretch; }
.ticket {
  position: relative; display: flex; flex-direction: column;
  background: #fbfcfe; border: 1px solid rgba(7,14,30,0.08);
  border-radius: 20px; padding: 36px 32px 32px;
  box-shadow: 0 1px 0 rgba(7,14,30,0.02), 0 30px 60px -40px rgba(7,14,30,0.12);
  transition: border-color .2s ease;
}
.ticket:hover { border-color: rgba(7,14,30,0.18); }
.ticket.is-featured {
  background: radial-gradient(ellipse 120% 80% at 50% 0%, rgba(46,111,219,0.10), transparent 60%), linear-gradient(180deg, #f4f7ff, #ffffff);
  border-color: rgba(46,111,219,0.35);
  box-shadow: 0 1px 0 rgba(7,14,30,0.02), 0 40px 80px -40px rgba(46,111,219,0.25);
}
.ticket-flag {
  position: absolute; top: -12px; left: 32px;
  background: linear-gradient(180deg, var(--blue-2), var(--blue));
  color: white; font-family: var(--mono); font-size: 10px;
  letter-spacing: 0.16em; text-transform: uppercase;
  padding: 6px 12px; border-radius: 999px; font-weight: 600;
  display: inline-flex; align-items: center; gap: 6px;
}
.ticket-flag::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--teal); box-shadow: 0 0 8px var(--teal); }
.ticket-name { font-family: var(--display); font-weight: 700; font-size: 20px; letter-spacing: -0.015em; color: #0a1226; margin: 0 0 6px; }
.ticket-tag { font-size: 13.5px; color: #5a6478; margin: 0 0 22px; line-height: 1.45; }
.ticket-price { display: flex; align-items: baseline; gap: 4px; margin-bottom: 4px; }
.ticket-price .cur { font-family: var(--display); font-weight: 600; font-size: 28px; color: #5a6478; letter-spacing: -0.02em; }
.ticket-price .amt { font-family: var(--display); font-weight: 700; font-size: 64px; letter-spacing: -0.04em; line-height: 1; color: #0a1226; }
.ticket-sub { font-family: var(--mono); font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase; color: #5a6478; margin-bottom: 28px; }
.ticket-split { display: flex; flex-direction: column; margin-bottom: 28px; border-top: 1px solid rgba(7,14,30,0.08); }
.ticket-split .split-row { display: flex; align-items: center; justify-content: space-between; padding: 18px 0; border-bottom: 1px solid rgba(7,14,30,0.06); }
.ticket-split .split-row:last-child { border-bottom: 0; }
.ticket-split .split-label { font-family: var(--display); font-weight: 500; font-size: 14.5px; color: #2c3650; }
.ticket-split .split-price { display: flex; align-items: baseline; gap: 2px; }
.ticket-split .split-price .cur { font-family: var(--display); font-weight: 600; font-size: 16px; color: #5a6478; }
.ticket-split .split-price .amt { font-family: var(--display); font-weight: 700; font-size: 32px; letter-spacing: -0.03em; line-height: 1; color: #0a1226; }
.ticket-cta {
  margin-top: auto; width: 100%;
  display: flex; align-items: center; justify-content: center;
  gap: 8px; padding: 14px 18px; border-radius: 10px;
  font-weight: 600; font-size: 14.5px; transition: all .15s ease;
}
.ticket-cta.primary { background: linear-gradient(180deg, var(--blue-2), var(--blue)); color: white; box-shadow: 0 1px 0 rgba(255,255,255,0.18) inset, 0 12px 30px -14px rgba(46,111,219,0.7); }
.ticket-cta.primary:hover { transform: translateY(-1px); }
.ticket-cta.ghost { background: #ffffff; border: 1px solid rgba(7,14,30,0.14); color: #0a1226; }
.ticket-cta.ghost:hover { background: #f4f6fb; border-color: rgba(7,14,30,0.24); }
.ticket-foot { margin-top: 14px; padding-top: 14px; border-top: 1px solid rgba(7,14,30,0.08); font-family: var(--mono); font-size: 11px; letter-spacing: 0.08em; color: #5a6478; display: flex; align-items: center; gap: 8px; }
.ticket-foot .dot { width: 7px; height: 7px; border-radius: 50%; background: #8b94a8; }
.ticket-foot .dot.live { background: var(--teal); box-shadow: 0 0 8px var(--teal); animation: pulse 2.4s ease-in-out infinite; }
.ticket-link { color: var(--blue); transition: color .15s ease; }
.ticket-link:hover { color: var(--blue-deep); }
.tickets-note {
  margin-top: 28px; padding: 18px 22px;
  border: 1px dashed rgba(7,14,30,0.18); border-radius: 12px;
  display: flex; align-items: center; gap: 14px;
  color: #5a6478; font-size: 13.5px; background: #fafbfd;
}
.tickets-note .badge { font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--warn); border: 1px solid rgba(255,181,71,0.3); background: rgba(255,181,71,0.06); padding: 4px 8px; border-radius: 6px; flex-shrink: 0; }

/* ============ SPONSORS ============ */
.sponsors.light { background: #f6f7fb; }
.tier-block { margin-bottom: 56px; }
.tier-block:last-child { margin-bottom: 0; }
.tier-head { display: flex; align-items: center; gap: 18px; margin-bottom: 20px; padding-bottom: 14px; border-bottom: 1px solid rgba(7,14,30,0.08); }
.tier-name { font-family: var(--display); font-weight: 700; font-size: 22px; letter-spacing: -0.015em; color: #0a1226; display: flex; align-items: center; gap: 12px; }
.tier-chip { width: 12px; height: 12px; border-radius: 50%; }
.tier-chip.platinum { background: linear-gradient(135deg, #e8eef9, #a6b9d6); box-shadow: 0 0 14px rgba(232,238,249,0.4); }
.tier-chip.gold { background: linear-gradient(135deg, #ffd87a, #d49a25); box-shadow: 0 0 14px rgba(255,216,122,0.45); }
.tier-chip.silver { background: linear-gradient(135deg, #d6dde8, #8e98a8); box-shadow: 0 0 14px rgba(214,221,232,0.3); }
.tier-chip.bronze { background: linear-gradient(135deg, #d99863, #8a5a32); box-shadow: 0 0 14px rgba(217,152,99,0.4); }
.tier-meta { font-family: var(--mono); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: #8b94a8; margin-left: auto; }
.tier-grid { display: grid; gap: 1px; background: rgba(7,14,30,0.08); border: 1px solid rgba(7,14,30,0.08); border-radius: 16px; overflow: hidden; }
.tier-grid.platinum { grid-template-columns: repeat(2, 1fr); }
.tier-grid.gold { grid-template-columns: repeat(3, 1fr); }
.tier-grid.silver { grid-template-columns: repeat(4, 1fr); }
.tier-grid.bronze { grid-template-columns: repeat(6, 1fr); }
.sponsor-cell { background: #ffffff; display: flex; align-items: center; justify-content: center; padding: 24px; transition: background .15s ease; }
.tier-grid.platinum .sponsor-cell { aspect-ratio: 3 / 1.4; }
.tier-grid.gold .sponsor-cell { aspect-ratio: 3 / 1.3; }
.tier-grid.silver .sponsor-cell { aspect-ratio: 2.4 / 1; }
.tier-grid.bronze .sponsor-cell { aspect-ratio: 2 / 1; }
.sponsor-cell:hover { background: #fafbfd; }
.sponsor-cell img { max-height: 40px; width: auto; object-fit: contain; }
.sponsor-mark { font-family: var(--display); font-weight: 600; letter-spacing: -0.02em; color: #2c3650; display: flex; align-items: center; gap: 12px; text-align: center; }
.tier-grid.platinum .sponsor-mark { font-size: 28px; color: #0a1226; }
.tier-grid.gold .sponsor-mark { font-size: 22px; }
.tier-grid.silver .sponsor-mark { font-size: 17px; }
.tier-grid.bronze .sponsor-mark { font-size: 14px; color: #5a6478; }
.sponsor-mark .glyph { width: 32px; height: 32px; border-radius: 8px; background: linear-gradient(135deg, #f2f4f9, #e6eaf2); border: 1px solid rgba(7,14,30,0.10); display: flex; align-items: center; justify-content: center; font-family: var(--mono); font-size: 14px; color: var(--blue); }
.tier-grid.silver .sponsor-mark .glyph { width: 24px; height: 24px; font-size: 11px; }
.tier-grid.bronze .sponsor-mark .glyph { width: 20px; height: 20px; font-size: 10px; }

/* ============ SPONSOR LAYOUT ============ */
.sponsor-layout { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 64px; align-items: start; }
.sponsor-left p { font-size: 16px; line-height: 1.65; margin: 0 0 14px; color: var(--ink-local-3); }

/* ============ INQUIRY ============ */
.inquiry {
  display: flex; flex-direction: column; gap: 32px;
  padding: 48px;
  background: radial-gradient(900px 500px at 0% 0%, rgba(46,111,219,0.45), rgba(29,78,163,0.95) 60%), linear-gradient(180deg, #0d1f3f, #07101f);
  border: 1px solid rgba(46,111,219,0.4); border-radius: 22px;
  box-shadow: 0 40px 100px -40px rgba(7,14,30,0.35); color: var(--ink);
}
.inquiry h3 { font-family: var(--display); font-weight: 700; font-size: 28px; letter-spacing: -0.025em; line-height: 1.05; margin: 0 0 12px; color: var(--ink); }
.inquiry p { color: rgba(255,255,255,0.78); font-size: 15px; line-height: 1.55; margin: 0 0 20px; }
.inquiry .perks { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 10px; }
.inquiry .perks li { display: flex; gap: 12px; font-size: 14px; color: rgba(255,255,255,0.88); font-family: var(--mono); letter-spacing: 0.04em; }
.inquiry .perks li .arr { color: var(--teal); }

.inq-contact { display: flex; flex-direction: column; gap: 14px; align-items: flex-start; padding-top: 28px; border-top: 1px solid rgba(255,255,255,0.1); }
.inq-contact-label { font-family: var(--mono); font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; color: rgba(255,255,255,0.55); margin: 0; }
.inq-contact-btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 22px; border-radius: 12px;
  background: linear-gradient(180deg, var(--blue-2), var(--blue)); color: white;
  font-weight: 600; font-size: 15px; letter-spacing: -0.005em;
  box-shadow: 0 1px 0 rgba(255,255,255,0.18) inset, 0 16px 38px -16px rgba(46,111,219,0.7);
  transition: transform .12s ease;
}
.inq-contact-btn:hover { transform: translateY(-1px); }
.inq-contact-note { font-size: 13px; color: rgba(255,255,255,0.45); margin: 0; }

/* ============ ABOUT ============ */
.about { background: var(--bg-elev); color: var(--ink); border-bottom: 1px solid var(--line); }
.about .section-num { color: var(--cyan); }
.about .section-num::before { background: var(--cyan); }
.about .section-title { color: var(--ink); }
.about-layout { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 64px; align-items: start; }
.about-lead { font-size: 17px; color: var(--ink-2); line-height: 1.6; margin: 0 0 16px; }
.about-body { font-size: 15px; color: var(--ink-3); line-height: 1.65; margin: 0; }

.about-right { display: flex; flex-direction: column; gap: 16px; }

.recap-label { display: flex; }
.recap-badge {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--cyan); border: 1px solid rgba(63,182,255,0.3); background: rgba(63,182,255,0.06);
  padding: 6px 12px; border-radius: 999px;
}
.recap-badge::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 8px var(--cyan); }

.about-gallery { position: relative; }

.stats-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2px; background: var(--line); border: 1px solid var(--line); border-radius: 16px; overflow: hidden; }
.stat { background: var(--panel); padding: 22px 20px; transition: background .15s ease; }
.stat:hover { background: var(--panel-2); }
.stat-num { font-family: var(--display); font-weight: 800; font-size: 40px; letter-spacing: -0.04em; line-height: 1; color: var(--ink); margin-bottom: 6px; }
.stat-plus, .stat-pct { font-size: 24px; color: var(--cyan); }
.stat-label { font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-3); }
.gallery-rotator { position: relative; border-radius: 20px; overflow: hidden; background: var(--panel); }
.gallery-slide { opacity: 0; transition: opacity 0.7s ease; pointer-events: none; position: absolute; inset: 0; }
.gallery-slide.is-active { opacity: 1; pointer-events: auto; position: relative; inset: auto; }
.gallery-slide img { width: 100%; height: auto; display: block; border-radius: 20px; }
.gallery-dots { display: flex; gap: 8px; justify-content: center; margin-top: 16px; }
.gdot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--line-strong); border: 0; padding: 0; cursor: pointer;
  transition: background .2s ease, transform .2s ease;
}
.gdot.is-active { background: var(--cyan); transform: scale(1.3); }
.gallery-caption { text-align: center; margin-top: 10px; font-family: var(--mono); font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--ink-4); }

/* ============ FOOTER ============ */
.footer { padding: 80px 0 40px; background: var(--bg); border-top: 1px solid var(--line); }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 48px; margin-bottom: 64px; }
.footer-brand { display: flex; flex-direction: column; gap: 18px; }
.footer-brand img { height: 64px; width: auto; max-width: 256px; object-fit: contain; display: block; }
.footer-brand p { color: var(--ink-3); font-size: 14px; line-height: 1.55; margin: 0; max-width: 340px; }
.footer-col h4 { font-family: var(--mono); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-4); margin: 0 0 18px; font-weight: 500; }
.footer-col ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 10px; }
.footer-col li { color: var(--ink-3); font-size: 14px; }
.footer-col a { color: var(--ink-2); font-size: 14px; transition: color .15s ease; }
.footer-col a:hover { color: var(--cyan); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding-top: 28px; border-top: 1px solid var(--line); font-family: var(--mono); font-size: 11px; letter-spacing: 0.1em; color: var(--ink-4); }

/* ============ MOBILE NAV ============ */
.nav-toggle { display: none; flex-direction: column; justify-content: center; gap: 4px; width: 40px; height: 40px; padding: 10px; border-radius: 10px; background: rgba(255,255,255,0.04); border: 1px solid var(--line-strong); cursor: pointer; }
.nav-toggle span { display: block; height: 1.5px; width: 18px; background: var(--ink); transition: transform .2s ease, opacity .2s ease; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-5.5px) rotate(-45deg); }
.nav-mobile { display: none; flex-direction: column; gap: 2px; padding: 12px 20px 24px; border-top: 1px solid var(--line); background: rgba(4,6,12,0.96); backdrop-filter: blur(14px); }
.nav-mobile[hidden] { display: none !important; }
.nav-mobile.is-open { display: flex; }
.nav-mlink { font-family: var(--display); font-weight: 500; font-size: 17px; letter-spacing: -0.01em; padding: 14px 12px; color: var(--ink); border-bottom: 1px solid var(--line); }
.nav-mlink:last-of-type { border-bottom: 0; }
.nav-mcta { margin-top: 12px; padding: 14px 18px; border-radius: 10px; background: linear-gradient(180deg, var(--blue-2), var(--blue)); color: white; font-weight: 600; font-size: 15px; text-align: center; }

/* ============ RESPONSIVE ============ */
@media (max-width: 1100px) {
  .container { padding: 0 28px; }
  .nav-inner { padding: 12px 28px; }
  .nav-links { display: none; }
  .speakers-grid { grid-template-columns: repeat(3, 1fr); }
  .program-layout { grid-template-columns: 1fr; gap: 32px; }
  .tracks-rail { position: static; flex-direction: row; flex-wrap: wrap; }
  .track-btn { flex: 1 1 200px; }
  .tier-grid.platinum { grid-template-columns: 1fr; }
  .tier-grid.gold { grid-template-columns: repeat(2, 1fr); }
  .tier-grid.silver { grid-template-columns: repeat(3, 1fr); }
  .tier-grid.bronze { grid-template-columns: repeat(4, 1fr); }
  .about-layout { grid-template-columns: 1fr; gap: 40px; }
  .sponsor-layout { grid-template-columns: 1fr; gap: 40px; }
  .inquiry { padding: 32px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px; }
  .tickets-grid { grid-template-columns: 1fr; gap: 16px; max-width: 560px; margin: 0 auto; }
  .ticket.is-featured { order: -1; }
  .section-head { flex-direction: column; align-items: flex-start; gap: 20px; }
  .section-head .right { width: 100%; }
}
@media (max-width: 900px) {
  .nav-cta { padding: 8px 14px; font-size: 13px; }
  .nav-toggle { display: flex; }
  .hero-b { padding: 90px 0; min-height: 0; }
  .hero-b-title { font-size: clamp(48px, 12vw, 92px); }
  .hero-b-sub { font-size: 18px; margin: 16px auto 12px; max-width: 480px; }
  .hero-b-meta { font-size: 11px; padding: 9px 14px; gap: 12px; margin-bottom: 32px; }
  .hero-b-ctas { flex-wrap: wrap; }
  .blob { filter: blur(60px); opacity: 0.55; }
  .speakers-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 720px) {
  :root { --container: 100%; }
  .container { padding: 0 20px; }
  .section { padding: 72px 0; }
  .section-head { margin-bottom: 36px; }
  .section-title { font-size: clamp(30px, 7.5vw, 42px); }
  .section-sub { font-size: 15.5px; }
  .nav-inner { padding: 10px 20px; gap: 12px; }
  .brand-logo { height: 36px; max-width: 144px; }
  .nav-cta { display: none; }
  .hero-b { padding: 64px 0 72px; }
  .hero-b-title { font-size: clamp(40px, 12vw, 64px); line-height: 0.96; }
  .hero-b-title br { display: none; }
  .hero-b-sub { font-size: 16px; padding: 0 8px; }
  .eyebrow { font-size: 10px; padding: 5px 10px 5px 7px; }
  .hero-b .eyebrow { margin-bottom: 24px; }
  .hero-b-meta { flex-direction: column; gap: 4px; padding: 10px 16px; border-radius: 14px; text-align: center; margin-bottom: 28px; }
  .hero-b-meta .dot { display: none; }
  .hero-b-ctas { flex-direction: column; align-items: stretch; gap: 10px; width: 100%; max-width: 320px; margin: 0 auto; }
  .hero-b-ctas .btn-primary, .hero-b-ctas .btn-ghost { justify-content: center; padding: 13px 18px; font-size: 14.5px; }
  .speakers-grid { grid-template-columns: 1fr 1fr; border-radius: 14px; }
  .speaker { padding: 16px; }
  .speaker-photo { margin-bottom: 14px; border-radius: 10px; }
  .speaker-photo .ph { font-size: 36px; }
  .speaker-photo .tag { font-size: 8.5px; padding: 3px 7px; }
  .speaker-name { font-size: 15px; }
  .speaker-role { font-size: 12px; }
  .speakers-more { font-size: 11px; padding: 0 12px; line-height: 1.6; }
  .track-btn { flex: 1 1 100%; padding: 12px 14px; }
  .track-btn .name { font-size: 14px; }
  .track-panel.is-active { border-radius: 14px; }
  .session { grid-template-columns: 1fr; gap: 12px; padding: 20px 18px; }
  .session-time { display: flex; align-items: baseline; gap: 10px; font-size: 14px; }
  .session-time .dur { display: inline; margin-top: 0; }
  .session-title { font-size: 17px; }
  .session-desc { font-size: 13.5px; }
  .session-people { flex-direction: row; flex-wrap: wrap; gap: 16px; font-size: 12.5px; }
  .tickets-grid { gap: 14px; }
  .ticket { padding: 28px 22px 24px; border-radius: 16px; }
  .ticket-flag { left: 22px; font-size: 9.5px; padding: 5px 10px; }
  .ticket-name { font-size: 17px; }
  .ticket-tag { font-size: 12.5px; margin-bottom: 18px; }
  .ticket-price .amt { font-size: 52px; }
  .ticket-price .cur { font-size: 24px; }
  .ticket-split .split-row { padding: 14px 0; }
  .ticket-split .split-price .amt { font-size: 28px; }
  .ticket-cta { padding: 13px 16px; font-size: 14px; }
  .tickets-note { flex-direction: column; align-items: flex-start; gap: 10px; padding: 16px 18px; font-size: 13px; }
  .tier-block { margin-bottom: 36px; }
  .tier-name { font-size: 17px; }
  .tier-grid.platinum { grid-template-columns: 1fr; }
  .tier-grid.gold { grid-template-columns: repeat(2, 1fr); }
  .tier-grid.silver { grid-template-columns: repeat(2, 1fr); }
  .tier-grid.bronze { grid-template-columns: repeat(3, 1fr); }
  .sponsor-cell { padding: 14px; aspect-ratio: 2.2 / 1 !important; }
  .tier-grid.platinum .sponsor-mark { font-size: 20px; gap: 10px; }
  .tier-grid.gold .sponsor-mark { font-size: 16px; gap: 8px; }
  .tier-grid.silver .sponsor-mark { font-size: 13px; gap: 8px; }
  .tier-grid.bronze .sponsor-mark { font-size: 11.5px; gap: 6px; }
  .inquiry { padding: 28px 22px; gap: 28px; border-radius: 18px; }
  .inquiry h3 { font-size: 28px; }
  .inquiry p { font-size: 14.5px; }
  .inq-form { grid-template-columns: 1fr; gap: 12px; }
  .inq-form .submit-row { flex-direction: column; align-items: stretch; gap: 12px; }
  .inq-form .submit-row .btn-primary { justify-content: center; }
  .stat-num { font-size: 36px; }
  .stat-plus, .stat-pct { font-size: 22px; }
  .footer { padding: 56px 0 32px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; margin-bottom: 40px; }
  .footer-brand p { max-width: none; }
  .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
}
@media (max-width: 520px) {
  .speakers-grid { grid-template-columns: 1fr 1fr; }
  .tier-grid.gold { grid-template-columns: 1fr; }
  .tier-grid.silver { grid-template-columns: repeat(2, 1fr); }
  .tier-grid.bronze { grid-template-columns: repeat(2, 1fr); }
  .hero-b-title { font-size: clamp(36px, 13vw, 52px); }
  .ticket-price .amt { font-size: 44px; }
  .speaker-photo .ph { font-size: 30px; }
}