:root {
  --navy-950: #031127;
  --navy-900: #051735;
  --navy-800: #082657;
  --teal: #08a6b5;
  --teal-light: #28d4da;
  --gold: #d7a629;
  --white: #ffffff;
  --muted: #9fb5cf;
  --panel: rgba(5, 23, 53, .94);
  --ease: cubic-bezier(.22, 1, .36, 1);
}

* { box-sizing: border-box; }
html, body { width: 100%; height: 100%; }
html { background: var(--navy-950); }
body {
  margin: 0;
  overflow: hidden;
  color: var(--white);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 15% 20%, rgba(8, 166, 181, .14), transparent 28rem),
    radial-gradient(circle at 88% 78%, rgba(215, 166, 41, .09), transparent 25rem),
    linear-gradient(135deg, #020b1a, var(--navy-900) 52%, #031b36);
}
button, a { font: inherit; }
button { color: inherit; }

.skip-link {
  position: fixed; left: 1rem; top: -5rem; z-index: 100;
  padding: .8rem 1rem; color: var(--navy-950); background: white; border-radius: .5rem;
}
.skip-link:focus { top: 1rem; }

.topbar {
  height: 68px; padding: 0 clamp(1rem, 3vw, 2.5rem);
  display: flex; align-items: center; justify-content: space-between;
  position: fixed; inset: 0 0 auto; z-index: 20;
  background: linear-gradient(180deg, rgba(2, 11, 26, .92), rgba(2, 11, 26, .28));
}
.brand { display: flex; align-items: center; gap: .65rem; color: white; text-decoration: none; }
.brand > img {
  width: 48px; height: 48px; padding: 3px; object-fit: contain;
  border-radius: 8px; background: rgba(255,255,255,.98);
  box-shadow: 0 0 0 1px rgba(255,255,255,.16), 0 7px 22px rgba(0,0,0,.24);
}
.brand strong { display: block; font-size: .85rem; letter-spacing: .24em; }
.brand small { display: block; margin-top: .08rem; color: var(--muted); font-size: .62rem; letter-spacing: .08em; }
.top-actions { display: flex; gap: .5rem; }
.icon-button, .close-button {
  width: 40px; height: 40px; border: 1px solid rgba(255,255,255,.13); border-radius: 50%;
  display: grid; place-items: center; background: rgba(255,255,255,.05); cursor: pointer;
  transition: .25s ease;
}
.icon-button:hover, .icon-button:focus-visible, .close-button:hover, .close-button:focus-visible {
  border-color: var(--teal); background: rgba(8, 166, 181, .14); outline: none;
}

.deck { height: 100%; display: grid; grid-template-rows: minmax(0, 1fr) 78px; padding-top: 58px; }
.stage { position: relative; display: grid; place-items: center; min-height: 0; padding: 1rem 5.5rem .5rem; overflow: hidden; }
.slide-frame {
  position: relative; display: grid; place-items: center; overflow: hidden;
  width: min(100%, calc((100vh - 152px) * 1.777777));
  aspect-ratio: 16 / 9; border-radius: 10px; background: #fff;
  box-shadow: 0 30px 80px rgba(0,0,0,.46), 0 0 0 1px rgba(255,255,255,.12);
  transform-origin: center; animation: reveal .7s var(--ease) both;
}
.slide-frame.is-changing { animation: change .38s var(--ease) both; }
.slide-frame img { width: 100%; height: 100%; display: block; object-fit: contain; user-select: none; }
.slide-glow { position: absolute; inset: 0; pointer-events: none; box-shadow: inset 0 0 0 1px rgba(255,255,255,.18); }

.ambient { position: absolute; width: 34vw; aspect-ratio: 1; border-radius: 50%; filter: blur(80px); opacity: .08; pointer-events: none; }
.ambient-one { left: -14vw; top: 15%; background: var(--teal); }
.ambient-two { right: -16vw; bottom: 0; background: var(--gold); }

.nav-button {
  position: absolute; top: 50%; z-index: 4; transform: translateY(-50%);
  width: 48px; height: 64px; border: 1px solid rgba(255,255,255,.13); border-radius: 999px;
  background: rgba(2, 11, 26, .6); backdrop-filter: blur(12px); cursor: pointer;
  font-size: 2.2rem; line-height: 1; transition: .25s ease;
}
.nav-button:hover, .nav-button:focus-visible { background: var(--teal); border-color: var(--teal-light); outline: none; transform: translateY(-50%) scale(1.05); }
.nav-button:disabled { opacity: .25; cursor: default; }
.nav-prev { left: 1.5rem; }
.nav-next { right: 1.5rem; }

.deck-footer {
  position: relative; z-index: 5; display: grid; grid-template-columns: minmax(220px, 1fr) minmax(260px, 1.5fr) minmax(150px, 1fr);
  align-items: center; gap: 2rem; padding: 0 clamp(1.2rem, 3vw, 2.8rem);
  border-top: 1px solid rgba(255,255,255,.08); background: rgba(2,11,26,.72); backdrop-filter: blur(18px);
}
.slide-meta { display: flex; align-items: center; gap: .8rem; min-width: 0; }
.slide-meta > span { color: var(--teal-light); font-size: .72rem; letter-spacing: .14em; }
.slide-meta strong, .slide-meta small { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.slide-meta strong { font-size: .82rem; }
.slide-meta small { margin-top: .18rem; color: var(--muted); font-size: .67rem; }
.progress-wrap { display: flex; align-items: center; gap: .9rem; }
.progress { flex: 1; height: 3px; overflow: hidden; border-radius: 3px; background: rgba(255,255,255,.12); }
.progress span { display: block; width: 11.111%; height: 100%; background: linear-gradient(90deg, var(--gold), var(--teal-light)); transition: width .55s var(--ease); }
.progress-wrap > span { min-width: 46px; color: var(--muted); font-size: .66rem; letter-spacing: .12em; }
.keyboard-hint { justify-self: end; color: var(--muted); font-size: .68rem; }
kbd { padding: .14rem .35rem; margin-right: .18rem; border: 1px solid rgba(255,255,255,.16); border-radius: .25rem; background: rgba(255,255,255,.07); }

.panel {
  position: fixed; top: 0; right: 0; bottom: 0; z-index: 50; width: min(480px, 92vw); padding: 1.5rem;
  background: var(--panel); border-left: 1px solid rgba(255,255,255,.1); backdrop-filter: blur(24px);
  box-shadow: -30px 0 80px rgba(0,0,0,.4); transform: scale(.985); transform-origin: right center;
  opacity: 0; visibility: hidden; pointer-events: none;
  transition: transform .35s var(--ease), opacity .35s ease, visibility .35s;
}
.panel.is-open { transform: none; opacity: 1; visibility: visible; pointer-events: auto; }
.panel-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1.4rem; }
.panel-head span { color: var(--teal-light); font-size: .66rem; letter-spacing: .18em; text-transform: uppercase; }
.panel-head h2 { margin: .25rem 0 0; font-size: 1.45rem; }
.close-button { font-size: 1.5rem; }
.thumb-grid { display: grid; grid-template-columns: 1fr 1fr; gap: .8rem; max-height: calc(100vh - 105px); overflow-y: auto; padding-right: .3rem; }
.thumb {
  padding: 0; overflow: hidden; color: white; text-align: left; border: 1px solid rgba(255,255,255,.12); border-radius: .55rem;
  background: rgba(255,255,255,.04); cursor: pointer; transition: .25s ease;
}
.thumb:hover, .thumb:focus-visible, .thumb.is-current { border-color: var(--teal); transform: translateY(-2px); outline: none; }
.thumb img { width: 100%; aspect-ratio: 16/9; object-fit: cover; display: block; }
.thumb span { display: block; padding: .55rem .65rem; font-size: .67rem; }
.notes-content { color: #dbe7f6; line-height: 1.65; }
.notes-content > p { font-size: 1.05rem; }
.notes-content h3 { margin-top: 2rem; color: var(--teal-light); font-size: .72rem; letter-spacing: .14em; text-transform: uppercase; }
.notes-content ul { padding-left: 1.2rem; }
.notes-content li { margin: .7rem 0; }
.backdrop { position: fixed; inset: 0; z-index: 40; background: rgba(0,0,0,.55); backdrop-filter: blur(3px); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

@keyframes reveal { from { opacity: 0; transform: translateY(14px) scale(.985); } to { opacity: 1; transform: none; } }
@keyframes change { 0% { opacity: .35; transform: scale(.985); } 100% { opacity: 1; transform: none; } }

@media (max-width: 760px) {
  .topbar { height: 56px; }
  .brand > img { width: 42px; height: 42px; }
  .brand small, .keyboard-hint { display: none; }
  .deck { padding-top: 50px; grid-template-rows: minmax(0,1fr) 70px; }
  .stage { padding: .65rem .8rem; }
  .slide-frame { width: 100%; border-radius: 5px; }
  .nav-button { top: auto; bottom: .9rem; width: 42px; height: 42px; background: rgba(2,11,26,.86); }
  .nav-prev { left: 1.2rem; }
  .nav-next { right: 1.2rem; }
  .deck-footer { grid-template-columns: minmax(0,1fr) minmax(145px, .8fr); gap: .8rem; padding: 0 1rem; }
  .slide-meta small { display: none; }
  .progress-wrap { gap: .45rem; }
  .thumb-grid { grid-template-columns: 1fr; }
}

@media (orientation: portrait) and (max-width: 760px) {
  .stage::after { content: "Gire o celular para uma experiência de apresentação mais ampla"; position: absolute; bottom: 5.8rem; left: 50%; transform: translateX(-50%); width: 80%; color: var(--muted); text-align: center; font-size: .7rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
}