:root {
  --bg: radial-gradient(1200px 1200px at 80% -10%, #0ea5e9 0%, transparent 40%),
    radial-gradient(900px 900px at 0% 110%, #8b5cf6 0%, transparent 35%),
    linear-gradient(180deg, #0b1020 0%, #0b1020 100%);
  --card-bg: rgba(255, 255, 255, 0.05);
  --text: #e7eaf1;
  --muted: #9aa3b2;
  --accent: #22d3ee;
  --accent-2: #a78bfa;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box
}

html,
body {
  height: 100%
}

html {
  scroll-behavior: smooth
}

body {
  margin: 0;
  color: var(--text);
  font-family: "Inter", system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  background: var(--bg);
  background-attachment: fixed;
  overflow: hidden;
}

/* Header */
.app-header {
  position: fixed;
  top: 12px;
  left: 12px;
  right: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  border-radius: 16px;
  background: rgba(10, 12, 24, 0.45);
  backdrop-filter: blur(8px);
  box-shadow: var(--shadow);
  z-index: 999;
}

.brand {
  display: flex;
  gap: 10px;
  align-items: center;
  font-weight: 800;
  letter-spacing: 0.3px
}

.brand .dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent)
}

.app-controls button {
  all: unset;
  padding: 8px 14px;
  background: var(--card-bg);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  cursor: pointer;
  font-weight: 600;
}

.app-controls button:hover {
  background: rgba(255, 255, 255, 0.12)
}

/* Scroll deck */
.deck {
  position: fixed;
  inset: 0;
  padding: 72px 0 28px;
  overflow-y: auto;
  height: 100dvh;
  scroll-snap-type: y mandatory;
}

.page {
  height: 100dvh;
  scroll-snap-align: start;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  padding-top: calc(24px + 4.5vh);
  opacity: 0.35;
  transform: translateY(0) scale(.98);
  transition: opacity .5s ease, transform .7s cubic-bezier(.2, .62, .2, 1);
}

.page.is-visible {
  opacity: 1;
  transform: translateY(0) scale(1)
}

.card {
  width: min(2100px, 92vw);
  background: rgba(20, 24, 42, 0.65);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 28px;
  padding: 40px 48px;
  box-shadow: var(--shadow);
}

/* Iframe wrapper for D3 pages */
.iframe-wrap {
  width: 94%;
  height: 94%;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 0;
  padding: 0;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.iframe-wrap iframe {
  width: 100%;
  height: 100%;
  display: block;
  background: #0e1326
}

/* Slide content */
.slide h1 {
  font-size: clamp(32px, 6vw, 56px);
  margin: 0 0 12px
}

.slide h2 {
  font-size: clamp(24px, 4vw, 36px);
  margin: 0 0 12px;
  color: var(--accent)
}

.slide p {
  font-size: clamp(16px, 2vw, 18px);
  line-height: 1.6;
  color: var(--muted)
}

.slide .lead {
  font-size: clamp(18px, 2.4vw, 22px);
  color: #e9f6ff
}

/* Dot nav */
.dot-nav {
  position: fixed;
  right: 12px;
  top: 50%;
  translate: 0 -50%;
  display: flex;
  flex-direction: column;
  gap: 10px;
  z-index: 998;
}

.dot-nav button {
  width: 12px;
  height: 12px;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  background: rgba(255, 255, 255, 0.35);
  transition: transform .2s ease;
}

.dot-nav button[aria-current="true"] {
  background: var(--accent-2);
  box-shadow: 0 0 14px var(--accent-2);
  transform: scale(1.3);
}

/* hide scrollbar  */
/* Hide scrollbar but keep scrolling */
.deck {
  scrollbar-width: none;
  /* Firefox */
  -ms-overflow-style: none;
  /* IE/Edge legacy */
}

.deck::-webkit-scrollbar {
  /* Chrome/Safari/Edge (Chromium) */
  width: 0px;
  height: 0px;
  display: none;
}

/* Footer progress */
.progress {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  height: 6px;
  background: rgba(255, 255, 255, 0.06);
  z-index: 998
}

.progress .bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(to right, var(--accent), var(--accent-2));
  transition: width .25s ease
}


/* Examples */
/* .iframe-wrap{                          width:  min(1400px, 96vw);  height: min(82vh, 82dvh);} */

/*  .iframe-wrap.full {    width:  98vw;   height: calc(100dvh - 120px);       }  */