/* ============================================================================
   SYHF 2026 — Main Stage reel (full-screen, scroll-snapped, faint arena bg)
   ========================================================================== */
html, body { min-height: 100%; }
body { background: var(--syhs-ground); color: var(--syhs-white); }
/* The reel used to be its own 100vh scroll container with body overflow hidden.
   Now that the theme section opens the page, the document itself scrolls: the
   theme reads as normal prose, then the agenda scenes snap. Proximity, not
   mandatory, so the theme is never yanked around while you read it. */
html { scroll-snap-type: y proximity; scroll-behavior: smooth; }

/* ---- Faint arena backdrop (fixed) ------------------------------------- */
.stage-bg {
  position: fixed; inset: 0; z-index: -3;
  background: url("assets/img/stage-hero.webp") center/cover no-repeat;
  opacity: 0.62;
  animation: bgdrift 40s ease-in-out infinite alternate;
}
@keyframes bgdrift { from { transform: scale(1.04) translate3d(0,0,0); } to { transform: scale(1.12) translate3d(-1.5%, -1%, 0); } }
.stage-bg__veil {
  position: fixed; inset: 0; z-index: -2;
  background:
    radial-gradient(75% 65% at 50% 42%, rgba(80,49,124,0.20), transparent 72%),
    linear-gradient(180deg, rgba(14,9,26,0.58), rgba(14,9,26,0.72));
}

/* Living aurora — big blurred blobs drifting behind the content */
.stage-aurora { position: fixed; inset: -25%; z-index: -1; pointer-events: none; filter: blur(70px); }
.stage-aurora span { position: absolute; width: 46vw; height: 46vw; border-radius: 50%; mix-blend-mode: screen; opacity: 0.55; }
.stage-aurora span:nth-child(1) { left: -4%; top: 6%; background: radial-gradient(circle, rgba(102,211,161,0.55), transparent 68%); animation: aur1 30s ease-in-out infinite alternate; }
.stage-aurora span:nth-child(2) { right: -6%; top: 0%; background: radial-gradient(circle, rgba(150,130,202,0.6), transparent 68%); animation: aur2 36s ease-in-out infinite alternate; }
.stage-aurora span:nth-child(3) { left: 20%; bottom: -12%; background: radial-gradient(circle, rgba(14,71,106,0.6), transparent 66%); animation: aur3 42s ease-in-out infinite alternate; }
.stage-aurora span:nth-child(4) { right: 12%; bottom: -6%; background: radial-gradient(circle, rgba(63,154,118,0.45), transparent 68%); animation: aur1 34s ease-in-out infinite alternate-reverse; }
@keyframes aur1 { from { transform: translate3d(0,0,0) scale(1); } to { transform: translate3d(14%, 10%, 0) scale(1.25); } }
@keyframes aur2 { from { transform: translate3d(0,0,0) scale(1.1); } to { transform: translate3d(-12%, 14%, 0) scale(0.9); } }
@keyframes aur3 { from { transform: translate3d(0,0,0) scale(1); } to { transform: translate3d(10%, -12%, 0) scale(1.2); } }

/* Slow diagonal light beam sweeping across */
.stage-beam { position: fixed; inset: -50%; z-index: -1; pointer-events: none;
  background: linear-gradient(115deg, transparent 40%, rgba(255,255,255,0.05) 48%, rgba(150,130,202,0.10) 50%, transparent 60%);
  animation: beam 18s ease-in-out infinite; }
@keyframes beam { 0%,100% { transform: translateX(-18%); opacity: 0; } 50% { transform: translateX(18%); opacity: 1; } }

/* Drifting light particles */
.stage-particles { position: fixed; inset: 0; z-index: -1; pointer-events: none; overflow: hidden; }
.stage-particles i { position: absolute; bottom: -12px; width: 4px; height: 4px; border-radius: 50%;
  background: radial-gradient(circle, rgba(180,240,210,0.95), rgba(102,211,161,0) 70%);
  box-shadow: 0 0 8px 2px rgba(102,211,161,0.5); animation: rise linear infinite; opacity: 0; }
@keyframes rise { 0% { transform: translateY(0) scale(0.6); opacity: 0; } 12% { opacity: 0.9; } 88% { opacity: 0.7; } 100% { transform: translateY(-108vh) scale(1); opacity: 0; } }

/* ---- Fixed chrome ----------------------------------------------------- */
.stage-progress { position: fixed; top: 0; left: 0; right: 0; height: 3px; z-index: 30; background: rgba(255,255,255,0.08); }
#stage-progress-bar { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--syhs-tint-mint), var(--syhs-tint-violet)); transition: width 120ms linear; }

.stage-nav { position: fixed; top: 0; left: 0; right: 0; z-index: 25; display: flex; align-items: center; justify-content: space-between; gap: var(--space-3); padding: 1rem clamp(1rem, 4vw, 2.4rem); background: linear-gradient(180deg, rgba(14,9,26,0.7), transparent); }
.stage-nav__brand { display: inline-flex; align-items: center; gap: 0.5rem; font-weight: 700; letter-spacing: 0.03em; color: var(--syhs-white); text-decoration: none; font-size: 0.95rem; }
.stage-nav__days { display: inline-flex; gap: 0.4rem; }
.stage-nav__day { width: 34px; height: 34px; border-radius: 999px; border: 1px solid rgba(255,255,255,0.25); background: rgba(255,255,255,0.06); color: rgba(255,255,255,0.8); font: inherit; font-weight: 700; cursor: pointer; transition: background 180ms, color 180ms, border-color 180ms, transform 180ms; }
.stage-nav__day:hover { transform: translateY(-2px); border-color: var(--syhs-tint-mint); }
.stage-nav__day.is-active { background: var(--syhs-tint-mint); color: var(--syhs-ground); border-color: var(--syhs-tint-mint); }
/* The main call to action on this page — kept visible and lit at every
   width, including mobile (it used to be display:none below 780px so the
   day-jump pills would fit; the pills give way now instead, see below). */
.stage-nav__cta { position: relative; background: var(--syhs-signal); color: #fff; text-decoration: none;
  font-weight: 700; font-size: 0.9rem; padding: 0.5rem 1.1rem; border-radius: 999px;
  box-shadow: 0 0 0 0 rgba(var(--syhs-signal-rgb), 0.55); animation: stage-cta-pulse 2.8s ease-in-out infinite;
  transition: background 180ms; }
.stage-nav__cta:hover { background: var(--syhs-signal-alt); animation-play-state: paused; }
@keyframes stage-cta-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(var(--syhs-signal-rgb), 0.45); }
  50% { box-shadow: 0 0 0 8px rgba(var(--syhs-signal-rgb), 0); }
}

/* ---- The reel --------------------------------------------------------- */
.stage-reel { position: relative; z-index: 1; }

.scene { min-height: 100vh; min-height: 100svh; scroll-snap-align: start; display: grid; place-items: center; padding: clamp(5rem, 12vh, 8rem) clamp(1.25rem, 5vw, 4rem) clamp(3rem, 8vh, 5rem); position: relative; }
.scene__inner { width: 100%; max-width: 68rem; text-shadow: 0 2px 18px rgba(8,3,18,0.6); }
.scene__inner.center { text-align: center; max-width: 60rem; margin: 0 auto; }

/* Reveal (progressive) */
body.js .reveal { opacity: 0; transform: translateY(34px); transition: opacity 0.7s ease, transform 0.7s ease; }
.scene.is-active .reveal { opacity: 1; transform: none; }

.eyebrow { text-transform: uppercase; letter-spacing: 0.18em; font-size: 0.8rem; font-weight: 700; color: var(--syhs-tint-mint); margin: 0 0 var(--space-3); }
.scrollhint { display: inline-block; margin-top: var(--space-5); font-size: 0.82rem; color: rgba(255,255,255,0.6); letter-spacing: 0.04em; animation: bob 2.4s ease-in-out infinite; }
@keyframes bob { 0%,100% { transform: translateY(0); } 50% { transform: translateY(6px); } }

/* ---- Intro ------------------------------------------------------------ */
.intro__title { font-size: clamp(2.6rem, 8vw, 6rem); line-height: 1.02; letter-spacing: var(--tracking-tighter); font-weight: 700; margin: 0 0 var(--space-4); }
.intro__title em { font-family: var(--font-serif); font-style: italic; font-weight: 400; color: var(--syhs-tint-mint); }
.intro__lede { max-width: 40rem; margin: 0 auto var(--space-5); color: rgba(255,255,255,0.85); font-size: clamp(1rem, 1.6vw, 1.2rem); line-height: 1.55; }
.intro__days { display: flex; align-items: center; justify-content: center; gap: 0.6rem; flex-wrap: wrap; margin-bottom: var(--space-4); }
.intro__day { background: none; border: none; cursor: pointer; color: var(--syhs-white); font: inherit; font-size: clamp(1.3rem, 3vw, 2rem); font-weight: 700; letter-spacing: var(--tracking-tight); padding: 0.3rem 0.5rem; transition: color 180ms, transform 180ms; }
.intro__day em { font-family: var(--font-serif); font-style: italic; font-weight: 400; color: var(--syhs-tint-mint); }
.intro__day:hover { transform: translateY(-3px); color: var(--syhs-tint-mint); }
.intro__dot { color: rgba(255,255,255,0.4); }
.intro__venue { color: rgba(255,255,255,0.6); font-size: 0.9rem; margin: 0; }

/* ---- Day divider ------------------------------------------------------ */
.scene--day .scene__inner { }
.day__eyebrow { text-transform: uppercase; letter-spacing: 0.16em; font-size: 0.85rem; font-weight: 700; color: var(--syhs-tint-mint); margin: 0 0 var(--space-2); }
.day__num { font-size: clamp(4.5rem, 20vw, 15rem); line-height: 0.9; letter-spacing: -0.03em; font-weight: 800; margin: 0; text-transform: uppercase; }
.day__num span { font-family: var(--font-serif); font-style: italic; font-weight: 400; color: var(--syhs-tint-mint); text-transform: none; }
.day__theme { font-family: var(--font-serif); font-style: italic; font-size: clamp(1.2rem, 3vw, 2rem); color: rgba(255,255,255,0.9); margin: var(--space-3) 0 0; }

/* ---- Break ------------------------------------------------------------ */
.brk__time { display: inline-block; font-weight: 700; letter-spacing: 0.05em; color: var(--syhs-tint-mint); font-size: 0.95rem; margin-bottom: var(--space-2); }
.brk__title { font-family: var(--font-serif); font-style: italic; font-weight: 400; font-size: clamp(3rem, 10vw, 7rem); margin: 0; opacity: 0.9; }
.brk__sub { color: rgba(255,255,255,0.6); margin: var(--space-2) 0 0; }

/* ---- Session ---------------------------------------------------------- */
.sess__top { display: flex; align-items: center; gap: 0.6rem; flex-wrap: wrap; margin-bottom: var(--space-3); }
.sess__time { font-weight: 800; color: var(--syhs-white); font-size: 0.95rem; letter-spacing: 0.02em; }
.sess__format { font-size: 0.7rem; font-weight: 800; text-transform: uppercase; letter-spacing: 0.08em; padding: 0.3rem 0.7rem; border-radius: 999px; background: rgba(102,211,161,0.16); color: var(--syhs-tint-mint); }
.sess__format--flagship-panel, .sess__format--panel-live-demo { background: rgba(150,130,202,0.24); color: #d9cffb; }
.sess__format--competition { background: rgba(63,154,118,0.22); color: #b9f0d5; }
.sess__format--ceremony { background: rgba(255,255,255,0.12); color: #fff; }
.sess__daytag { margin-left: auto; font-size: 0.78rem; color: rgba(255,255,255,0.55); letter-spacing: 0.06em; text-transform: uppercase; }
.sess__theme { font-family: var(--font-serif); font-style: italic; color: var(--syhs-tint-mint); font-size: clamp(1rem, 2vw, 1.35rem); margin: 0 0 0.4rem; }
.sess__title { font-size: clamp(1.9rem, 4.6vw, 3.6rem); line-height: 1.06; letter-spacing: var(--tracking-tight); font-weight: 700; margin: 0 0 var(--space-3); max-width: 20ch; }
.sess__lead { font-size: clamp(1.02rem, 1.7vw, 1.3rem); line-height: 1.5; color: rgba(255,255,255,0.9); max-width: 46rem; margin: 0 0 var(--space-4); }
.sess__cols { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: clamp(1.5rem, 4vw, 3.5rem); align-items: start; }
.sess__h { font-size: 0.74rem; text-transform: uppercase; letter-spacing: 0.1em; color: rgba(255,255,255,0.55); margin: 0 0 var(--space-3); font-weight: 700; }
.sess__covers ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.7rem; }
.sess__covers li { position: relative; padding-left: 1.4rem; line-height: 1.45; color: rgba(255,255,255,0.88); font-size: 0.98rem; }
.sess__covers li::before { content: ""; position: absolute; left: 0; top: 0.55em; width: 8px; height: 8px; border-radius: 999px; background: var(--syhs-tint-mint); }
.spk-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.7rem; }
.spk { display: flex; align-items: center; gap: 0.8rem; }
.spk__ava { flex: 0 0 auto; width: 60px; height: 60px; border-radius: 999px; overflow: hidden; display: grid; place-items: center;
  font-weight: 800; color: #fff; font-size: 1.15rem; position: relative;
  background: linear-gradient(135deg, var(--syhs-tint-violet), var(--syhs-navy));
  box-shadow: 0 6px 16px -8px rgba(0,0,0,0.6), 0 0 0 2px rgba(255,255,255,0.14), 0 0 0 5px rgba(102,211,161,0.14); }
.spk__ava img { width: 100%; height: 100%; object-fit: cover; display: block; }
/* photo placeholder — a silhouette so it's clearly "drop a photo here" */
.spk__ava--ph { background: linear-gradient(135deg, rgba(150,130,202,0.5), rgba(14,71,106,0.6)); }
.spk__ava--ph svg { width: 62%; height: 62%; color: rgba(255,255,255,0.55); }
.spk--generic .spk__ava { background: linear-gradient(135deg, var(--syhs-navy), var(--syhs-signal-alt)); font-size: 0.95rem; }
.spk__txt { display: flex; flex-direction: column; line-height: 1.25; }
.spk__name { font-weight: 700; font-size: 0.95rem; }
.spk__org { font-size: 0.82rem; color: rgba(255,255,255,0.6); }

/* ---- Closing ---------------------------------------------------------- */
.closing__title { font-size: clamp(2.4rem, 6vw, 5rem); line-height: 1.05; letter-spacing: var(--tracking-tight); font-weight: 700; margin: 0 0 var(--space-3); }
.closing__lede { color: rgba(255,255,255,0.85); font-size: clamp(1rem, 1.6vw, 1.2rem); margin: 0 0 var(--space-5); }
.closing__cta { display: inline-block; background: var(--syhs-signal); color: #fff; text-decoration: none; font-weight: 700; padding: 0.9rem 1.8rem; border-radius: 999px; font-size: 1.05rem; }
.closing__cta:hover { background: var(--syhs-signal-alt); }

/* ---- Responsive ------------------------------------------------------- */
@media (max-width: 780px) {
  .sess__cols { grid-template-columns: 1fr; gap: var(--space-4); }
  .sess__title { max-width: none; }
  /* Day-jump pills give way, not Register — this is the page's one
     conversion action and needs to stay on screen and tappable. */
  .stage-nav__days { display: none; }
  .stage-nav__cta { padding: 0.6rem 1.3rem; font-size: 0.95rem; }
}
@media (prefers-reduced-motion: reduce) {
  .stage-bg, .scrollhint, .stage-nav__cta { animation: none; }
  html { scroll-behavior: auto; scroll-snap-type: none; }
}

/* Session actions — add to calendar / share */
.sess__actions { display: flex; flex-wrap: wrap; gap: 0.6rem; margin: 0 0 var(--space-4); }
.sess__act { display: inline-flex; align-items: center; gap: 0.5rem; font: inherit; font-weight: 700; font-size: 0.9rem;
  cursor: pointer; padding: 0.65rem 1.2rem; border-radius: 999px; border: 1px solid transparent;
  background: var(--syhs-tint-mint); color: #10331f;
  transition: transform 200ms var(--ease-editorial), background 200ms, box-shadow 200ms; }
.sess__act:hover { transform: translateY(-2px); background: #7ee6b6; box-shadow: 0 12px 26px -14px rgba(102,211,161,0.9); }
.sess__act--ghost { background: transparent; color: #fff; border-color: rgba(255,255,255,0.4); }
.sess__act--ghost:hover { background: rgba(255,255,255,0.12); border-color: #fff; }
.sess__act.is-done { background: var(--syhs-signal); color: #fff; }