:root {
  --bg: #070b14;
  --card: rgba(16, 26, 46, 0.78);
  --stroke: rgba(140, 180, 255, 0.16);
  --text: #eaf0ff;
  --muted: #93a4c7;
  --mint: #3ee0c4;
  --mint-dim: rgba(62, 224, 196, 0.14);
  --blue: #7aa2ff;
  --red: #ff6b81;
  --amber: #ffc857;
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.32);
  --radius: 20px;
  --safe-t: env(safe-area-inset-top, 0px);
  --safe-b: env(safe-area-inset-bottom, 0px);
  --topbar-h: 56px;
  --nav-h: 78px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
button, label, a { -webkit-tap-highlight-color: transparent; }

html, body {
  height: 100%;
  height: 100dvh;
  background: var(--bg);
  color: var(--text);
  font-family: Manrope, "Segoe UI", sans-serif;
  overflow: hidden;
}

.bg-grid, .bg-glow {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.bg-grid {
  background-image:
    linear-gradient(rgba(122, 162, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(122, 162, 255, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at center, black 35%, transparent 80%);
}

.bg-glow {
  inset: -20%;
  background:
    radial-gradient(circle at 15% 10%, rgba(62, 224, 196, 0.16), transparent 32%),
    radial-gradient(circle at 85% 0%, rgba(122, 162, 255, 0.18), transparent 28%),
    radial-gradient(circle at 70% 90%, rgba(255, 107, 129, 0.08), transparent 30%);
  animation: glowShift 14s ease-in-out infinite alternate;
}

@keyframes glowShift {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to { transform: translate3d(-3%, 2%, 0) scale(1.05); }
}

.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 6;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  padding: calc(10px + var(--safe-t)) 16px 8px;
  font-size: 13px;
  color: var(--muted);
  background: linear-gradient(180deg, rgba(7,11,20,0.92), rgba(7,11,20,0.55) 70%, transparent);
}

.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  color: var(--text);
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.brand-mark {
  width: 9px;
  height: 9px;
  flex: none;
  border-radius: 50%;
  background: var(--mint);
  box-shadow: 0 0 16px var(--mint);
  animation: pulse 2.4s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.25); opacity: 0.7; }
}

.topbar-meta { display: flex; gap: 8px; align-items: center; flex: none; }
#slideLabel { font-variant-numeric: tabular-nums; font-weight: 700; color: var(--text); }

.ghost-btn {
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--stroke);
  color: var(--text);
  border-radius: 999px;
  padding: 8px 12px;
  min-height: 36px;
  cursor: pointer;
  font: inherit;
  font-size: 12px;
  font-weight: 700;
}

.progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  padding-top: var(--safe-t);
  background: rgba(255,255,255,0.06);
  z-index: 7;
}

.progress-bar {
  height: 3px;
  width: 5%;
  background: linear-gradient(90deg, var(--mint), var(--blue));
  transition: width 0.4s cubic-bezier(.22,1,.36,1);
  box-shadow: 0 0 12px rgba(62, 224, 196, 0.6);
}

.deck {
  position: relative;
  height: 100%;
  z-index: 1;
}

.slide {
  position: absolute;
  inset: 0;
  overflow-y: auto;
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
  padding: calc(var(--topbar-h) + var(--safe-t) + 8px) 18px calc(var(--nav-h) + var(--safe-b) + 12px);
  opacity: 0;
  transform: translate3d(28px, 0, 0) scale(0.985);
  pointer-events: none;
  transition: opacity 0.38s ease, transform 0.42s cubic-bezier(.22,1,.36,1);
}

.slide.back { transform: translate3d(-28px, 0, 0) scale(0.985); }

.slide.active {
  opacity: 1;
  transform: none;
  pointer-events: auto;
  z-index: 2;
}

.slide-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding-bottom: 12px;
}

.slide.active .card,
.slide.active .threat,
.slide.active .panel,
.slide.active .stat,
.slide.active .callout,
.slide.active .check-grid label,
.slide.active .finale-rows div,
.slide.active .chip {
  animation: rise 0.55s cubic-bezier(.22,1,.36,1) both;
}

.slide.active .card:nth-child(2),
.slide.active .threat:nth-child(2),
.slide.active .stat:nth-child(2),
.slide.active .chip:nth-child(2) { animation-delay: 0.07s; }
.slide.active .card:nth-child(3),
.slide.active .threat:nth-child(3),
.slide.active .stat:nth-child(3),
.slide.active .chip:nth-child(3) { animation-delay: 0.14s; }
.slide.active .card:nth-child(4),
.slide.active .threat:nth-child(4),
.slide.active .chip:nth-child(4) { animation-delay: 0.2s; }
.slide.active .threat:nth-child(5) { animation-delay: 0.24s; }
.slide.active .threat:nth-child(6) { animation-delay: 0.28s; }

@keyframes rise {
  from { opacity: 0; transform: translate3d(0, 16px, 0); }
  to { opacity: 1; transform: none; }
}

.kicker, .eyebrow {
  color: var(--mint);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

h1 {
  font-size: clamp(34px, 9vw, 84px);
  line-height: 0.98;
  letter-spacing: -0.04em;
  font-weight: 800;
  margin-bottom: 16px;
}

h1 span {
  background: linear-gradient(90deg, var(--mint), var(--blue));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

h2 {
  font-size: clamp(24px, 6.4vw, 44px);
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 10px;
}

h3 { font-size: 17px; margin-bottom: 8px; }

.lead, .sub {
  color: var(--muted);
  font-size: 16px;
  max-width: 720px;
  line-height: 1.55;
  margin-bottom: 20px;
}

.lead.small { font-size: 15px; margin-top: 20px; }

.title-slide {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: calc(100dvh - var(--topbar-h) - var(--nav-h) - var(--safe-t) - var(--safe-b) - 36px);
}

.chip-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 4px; }

.chip {
  border: 1px solid var(--stroke);
  background: var(--mint-dim);
  color: var(--mint);
  border-radius: 999px;
  padding: 8px 12px;
  font-size: 12px;
  font-weight: 700;
}

.hint { margin-top: 28px; color: var(--muted); font-size: 13px; }
.mobile-only { display: none; }
.desktop-only { display: block; }

.grid-3, .grid-2 {
  display: grid;
  gap: 12px;
}

.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.card, .threat, .panel, .callout {
  background: var(--card);
  border: 1px solid var(--stroke);
  border-radius: var(--radius);
  padding: 16px 18px;
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow);
}

.num {
  display: block;
  color: var(--mint);
  font-family: "JetBrains Mono", monospace;
  margin-bottom: 8px;
  font-size: 12px;
}

.card p, .threat p, .panel p { color: var(--muted); line-height: 1.5; font-size: 15px; }

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 14px;
}

.stat {
  padding: 16px;
  border-radius: var(--radius);
  border: 1px solid var(--stroke);
  background: linear-gradient(180deg, rgba(62,224,196,0.08), rgba(16,26,46,0.6));
}

.stat strong { display: block; font-size: 26px; margin-bottom: 6px; }
.stat span { color: var(--muted); font-size: 13px; line-height: 1.45; }

.callout { margin-top: 12px; color: var(--text); line-height: 1.5; font-size: 15px; }
.callout.warn {
  border-color: rgba(255, 200, 87, 0.35);
  background: rgba(255, 200, 87, 0.08);
}

.split {
  display: grid;
  grid-template-columns: 1.35fr 0.85fr;
  gap: 14px;
  align-items: stretch;
}

.checklist, .card ul, .mini, .steps {
  color: var(--muted);
  padding-left: 18px;
  display: grid;
  gap: 9px;
  font-size: 15px;
  line-height: 1.45;
}

.checklist { list-style: none; padding-left: 0; }
.checklist li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
}
.checklist li::before {
  content: "";
  width: 8px;
  height: 8px;
  margin-top: 7px;
  flex: none;
  border-radius: 50%;
  background: var(--mint);
  box-shadow: 0 0 10px var(--mint);
}

.panel h3 { color: var(--mint); }
.accent-text { color: var(--mint) !important; font-weight: 700; margin-top: 10px; }

.tag {
  display: inline-block;
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: 999px;
  padding: 4px 8px;
  margin-bottom: 8px;
}

.tag.red { color: var(--red); background: rgba(255,107,129,0.12); }
.tag.amber { color: var(--amber); background: rgba(255,200,87,0.12); }
.tag.blue { color: var(--blue); background: rgba(122,162,255,0.12); }

.threat h3 { font-size: 16px; }
.do-dont { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.good { color: var(--mint); }
.bad { color: var(--red); }
.do-dont ul { padding-left: 18px; color: var(--muted); display: grid; gap: 8px; }

.mono, code {
  font-family: "JetBrains Mono", monospace;
  color: var(--mint);
  font-size: 0.92em;
  word-break: break-word;
}

.panel .mono {
  display: block;
  margin: 12px 0;
  padding: 10px 12px;
  border-radius: 12px;
  background: rgba(0,0,0,0.28);
}

.rank {
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  display: inline-block;
  margin-bottom: 8px;
}
.rank.best { color: var(--mint); }
.rank.ok { color: var(--blue); }
.rank.weak { color: var(--amber); }

.steps { counter-reset: s; list-style: none; padding-left: 0; }
.steps li { padding-left: 42px; position: relative; }
.steps li::before {
  counter-increment: s;
  content: counter(s);
  position: absolute;
  left: 0;
  top: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--mint-dim);
  color: var(--mint);
  font-size: 13px;
  font-weight: 800;
  display: grid;
  place-items: center;
}

.check-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.check-grid label {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  background: var(--card);
  border: 1px solid var(--stroke);
  border-radius: 16px;
  padding: 14px;
  font-size: 14px;
  line-height: 1.4;
  cursor: pointer;
  min-height: 52px;
}

.check-grid input {
  margin-top: 3px;
  width: 18px;
  height: 18px;
  flex: none;
  accent-color: var(--mint);
}

.finale-rows { display: grid; gap: 10px; max-width: 720px; }
.finale-rows div {
  display: flex;
  gap: 14px;
  align-items: center;
  background: var(--card);
  border: 1px solid var(--stroke);
  border-radius: 18px;
  padding: 14px 16px;
}
.finale-rows span {
  width: 34px;
  height: 34px;
  flex: none;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--mint);
  color: #06241d;
  font-weight: 800;
}
.finale-rows p { color: var(--muted); font-size: 15px; }

.nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 6;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 14px calc(12px + var(--safe-b));
  gap: 10px;
  background: linear-gradient(0deg, rgba(7,11,20,0.96), rgba(7,11,20,0.78) 55%, transparent);
}

.nav-mid {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  min-width: 0;
  flex: 1;
}

.nav-count { display: none; font-size: 12px; font-weight: 700; color: var(--muted); }

.nav-btn {
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--stroke);
  color: var(--text);
  border-radius: 999px;
  padding: 12px 16px;
  min-height: 48px;
  min-width: 48px;
  cursor: pointer;
  font: inherit;
  font-weight: 800;
  transition: transform 0.15s ease, opacity 0.2s ease;
}

.nav-btn.primary {
  background: linear-gradient(90deg, #2fd6b8, #6b93ff);
  border: none;
  color: #071018;
  padding-inline: 22px;
}

.nav-btn:active { transform: scale(0.96); }
.nav-btn:disabled { opacity: 0.35; cursor: default; transform: none; }

.dots {
  display: flex;
  gap: 5px;
  flex-wrap: wrap;
  justify-content: center;
  max-width: 100%;
}

.dots button {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  border: 0;
  background: rgba(255,255,255,0.2);
  cursor: pointer;
  padding: 0;
}

.dots button.on {
  background: var(--mint);
  transform: scale(1.35);
  box-shadow: 0 0 10px var(--mint);
}

.toc-backdrop {
  position: fixed;
  inset: 0;
  z-index: 8;
  background: rgba(0,0,0,0.45);
  backdrop-filter: blur(6px);
}

.toc {
  position: fixed;
  top: calc(58px + var(--safe-t));
  right: 16px;
  width: min(320px, calc(100vw - 32px));
  max-height: calc(100% - 150px - var(--safe-b));
  overflow: auto;
  z-index: 9;
  background: rgba(10, 16, 28, 0.96);
  border: 1px solid var(--stroke);
  border-radius: 18px;
  padding: 14px;
}

.toc-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.toc ol { padding-left: 18px; display: grid; gap: 4px; color: var(--muted); }
.toc button:not(.ghost-btn) {
  background: none;
  border: 0;
  color: inherit;
  font: inherit;
  cursor: pointer;
  text-align: left;
  padding: 8px 4px;
  min-height: 40px;
  width: 100%;
}
.toc button:not(.ghost-btn):active,
.toc button:not(.ghost-btn):hover { color: var(--mint); }

@media (max-width: 900px) {
  .hide-mobile { display: none !important; }
  .mobile-only { display: block; }
  .desktop-only { display: none; }
  .dots { display: none; }
  .nav-count { display: block; }
  .grid-3, .grid-2, .stats, .split, .do-dont, .check-grid { grid-template-columns: 1fr; }
  .brand { font-size: 13px; max-width: 46vw; }
  .slide { padding-left: 14px; padding-right: 14px; }
  .card, .threat, .panel, .callout { padding: 14px 15px; }
  .nav-btn.primary { flex: none; min-width: 112px; }
  .toc {
    top: auto;
    right: 0;
    left: 0;
    bottom: 0;
    width: 100%;
    max-height: min(78dvh, 640px);
    border-radius: 22px 22px 0 0;
    padding: 16px 16px calc(18px + var(--safe-b));
    animation: sheet 0.32s cubic-bezier(.22,1,.36,1);
  }
}

@keyframes sheet {
  from { transform: translate3d(0, 24%, 0); opacity: 0.4; }
  to { transform: none; opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
}

@media print {
  html, body { overflow: visible; background: #070b14; }
  .topbar, .progress, .nav, .toc, .toc-backdrop, .bg-grid { display: none !important; }
  .deck { padding: 0; height: auto; }
  .slide {
    position: relative;
    display: block !important;
    opacity: 1 !important;
    transform: none !important;
    pointer-events: auto !important;
    page-break-after: always;
    height: auto;
    padding: 36px 40px;
  }
}