* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  height: 100%;
}

body {
  margin: 0;
  overflow: hidden;
  font-family: var(--font-body);
  color: var(--text-dark);
  background: var(--bg-panel);
}

h1,
h2,
p {
  margin: 0;
}

.deck {
  width: 100vw;
  height: 100vh;
}

.slide {
  position: relative;
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
  padding: var(--slide-padding);
  display: flex;
  flex-direction: column;
  justify-content: center;
  background:
    radial-gradient(circle at 15% 20%, rgba(36, 87, 214, 0.13), transparent 30%),
    radial-gradient(circle at 88% 18%, rgba(198, 161, 91, 0.14), transparent 24%),
    var(--bg-panel);
  contain: layout paint;
  animation: slide-in 0.72s var(--ease-out-expo) both;
}

.slide::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: radial-gradient(rgba(8, 17, 31, 0.12) 1px, transparent 1px);
  background-size: clamp(16px, 2.2vw, 28px) clamp(16px, 2.2vw, 28px);
  mask-image: linear-gradient(120deg, rgba(0, 0, 0, 0.05), rgba(0, 0, 0, 0.9), rgba(0, 0, 0, 0.18));
  opacity: 0.52;
}

.slide-cover,
.slide-compare,
.slide-loop,
.slide-map,
.slide-steps {
  color: var(--text-light);
  background:
    radial-gradient(circle at 20% 18%, rgba(36, 87, 214, 0.35), transparent 35%),
    radial-gradient(circle at 88% 80%, rgba(198, 161, 91, 0.2), transparent 30%),
    linear-gradient(135deg, var(--bg-ink), var(--bg-deep));
}

.slide-cover::before,
.slide-compare::before,
.slide-loop::before,
.slide-map::before,
.slide-steps::before {
  background-image: radial-gradient(rgba(255, 255, 255, 0.2) 1px, transparent 1px);
  opacity: 0.38;
}

.slide > * {
  position: relative;
  z-index: 1;
}

.slide-header {
  max-width: min(82vw, 980px);
}

.label {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 0.24em 0.75em;
  border: 1px solid rgba(36, 87, 214, 0.38);
  border-left: 4px solid var(--gold);
  border-radius: 999px;
  color: var(--blue);
  background: rgba(255, 255, 255, 0.58);
  font-size: var(--kicker-size);
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.slide-cover .label,
.slide-compare .label,
.slide-loop .label,
.slide-map .label,
.slide-steps .label {
  color: var(--gold);
  border-color: rgba(198, 161, 91, 0.38);
  border-left-color: var(--gold);
  background: rgba(8, 28, 51, 0.72);
}

.slide-header h1 {
  margin-top: clamp(0.65rem, 1.8vh, 1.25rem);
  max-width: 18ch;
  color: var(--text-dark);
  font-family: var(--font-display);
  font-size: var(--title-size);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: 0;
}

.slide-compare .slide-header h1,
.slide-loop .slide-header h1,
.slide-map .slide-header h1,
.slide-steps .slide-header h1 {
  color: var(--text-light);
}

.subtitle {
  margin-top: clamp(0.55rem, 1.35vh, 1rem);
  max-width: 64ch;
  color: var(--text-mid);
  font-size: var(--body-size);
  line-height: 1.58;
}

.slide-compare .subtitle,
.slide-loop .subtitle,
.slide-map .subtitle,
.slide-steps .subtitle {
  color: rgba(247, 251, 255, 0.76);
}

.slide-footer {
  position: absolute;
  right: var(--slide-padding);
  bottom: clamp(0.7rem, 2vw, 1.4rem);
  left: var(--slide-padding);
  display: flex;
  justify-content: space-between;
  color: rgba(65, 81, 106, 0.65);
  font-size: var(--small-size);
  font-weight: 700;
}

.slide-cover .slide-footer,
.slide-compare .slide-footer,
.slide-loop .slide-footer,
.slide-map .slide-footer,
.slide-steps .slide-footer {
  color: rgba(247, 251, 255, 0.52);
}

.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 9999;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--blue), var(--gold));
  transition: width 0.18s ease;
}

.deck-nav {
  position: fixed;
  right: 22px;
  bottom: 18px;
  z-index: 9998;
  display: flex;
  gap: 8px;
  align-items: center;
  padding: 7px;
  border: 1px solid var(--nav-line);
  border-radius: 999px;
  background: var(--nav-bg);
  color: var(--text-dark);
  box-shadow: var(--nav-shadow);
  backdrop-filter: blur(14px);
}

.deck-nav button {
  width: 32px;
  height: 32px;
  border: 0;
  border-radius: 50%;
  background: var(--nav-button);
  color: var(--nav-ink);
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

.deck-nav button:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.deck-nav span {
  min-width: 54px;
  text-align: center;
  color: var(--text-mid);
  font-size: var(--small-size);
  font-weight: 800;
}

.slide-dots {
  position: fixed;
  right: clamp(0.7rem, 1.5vw, 1.4rem);
  top: 50%;
  z-index: 9998;
  display: flex;
  flex-direction: column;
  gap: clamp(0.28rem, 0.7vw, 0.5rem);
  transform: translateY(-50%);
}

.slide-dot {
  width: clamp(6px, 0.7vw, 9px);
  height: clamp(6px, 0.7vw, 9px);
  padding: 0;
  border: 1px solid var(--dots-dot-line);
  border-radius: 999px;
  background: var(--dots-dot);
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.slide-dot:hover,
.slide-dot.is-active {
  border-color: var(--dots-dot-active);
  background: var(--dots-dot-active);
  transform: scale(1.45);
}

.slide-cover {
  justify-content: center;
}

.cover-mark {
  position: absolute;
  right: var(--slide-padding);
  top: var(--slide-padding);
  color: var(--gold);
  font-size: var(--small-size);
  font-weight: 800;
  letter-spacing: 0.12em;
}

.cover-copy {
  max-width: min(78vw, 960px);
}

.cover-copy h1 {
  margin-top: clamp(1rem, 2.5vh, 1.8rem);
  max-width: 11ch;
  color: var(--text-light);
  font-family: var(--font-display);
  font-size: clamp(3.2rem, 9vw, 8.2rem);
  font-weight: 800;
  line-height: 0.94;
}

.cover-copy p {
  margin-top: clamp(0.95rem, 2.3vh, 1.7rem);
  color: rgba(247, 251, 255, 0.76);
  font-size: clamp(1.1rem, 2.4vw, 2rem);
  line-height: 1.4;
}

.cover-line {
  position: absolute;
  left: var(--slide-padding);
  bottom: clamp(2.2rem, 5vh, 4rem);
  padding-left: 1rem;
  border-left: 5px solid var(--gold);
  color: var(--gold);
  font-size: var(--body-size);
  font-weight: 800;
}

.concept-grid {
  margin-top: clamp(1.3rem, 4vh, 3rem);
  display: grid;
  grid-template-columns: minmax(220px, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(1rem, 3vw, 3rem);
  align-items: stretch;
  max-width: min(90vw, 1120px);
}

.concept-core {
  min-height: clamp(230px, 42vh, 370px);
  display: grid;
  place-items: center;
  padding: clamp(1rem, 2.6vw, 2rem);
  border: 1px solid rgba(198, 161, 91, 0.48);
  border-left: 6px solid var(--gold);
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(8, 17, 31, 0.98), rgba(12, 26, 44, 0.96));
  color: var(--text-light);
  box-shadow: var(--shadow);
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 4rem);
  font-weight: 800;
  line-height: 1;
  text-align: center;
}

.concept-items {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(0.55rem, 1.5vw, 1rem);
}

.concept-items article,
.triad article,
.compare-card,
.flow-row article,
.checklist-grid article,
.map-node,
.steps article {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.82);
  box-shadow: 0 18px 54px rgba(8, 17, 31, 0.08);
}

.slide-compare .compare-card,
.slide-loop .flow-row article,
.slide-map .map-node,
.slide-steps .steps article {
  border-color: rgba(255, 255, 255, 0.16);
  background: rgba(8, 28, 51, 0.82);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.22);
}

.concept-items article {
  min-height: clamp(110px, 18vh, 160px);
  padding: clamp(0.9rem, 1.8vw, 1.35rem);
}

.concept-items strong,
.checklist-grid strong {
  color: var(--blue);
  font-family: var(--font-display);
  font-size: var(--h3-size);
  font-weight: 800;
}

.concept-items p,
.checklist-grid p {
  margin-top: 0.55rem;
  color: var(--text-mid);
  font-size: var(--body-size);
  line-height: 1.45;
}

.bottom-note,
.quote-line {
  margin-top: clamp(1rem, 3vh, 2rem);
  max-width: min(84vw, 1050px);
  padding: clamp(0.85rem, 2vw, 1.45rem);
  border-left: clamp(4px, 0.7vw, 8px) solid var(--gold);
  background: rgba(255, 255, 255, 0.78);
  box-shadow: var(--shadow);
  color: var(--text-dark);
  font-family: var(--font-serif);
  font-size: clamp(1.1rem, 2.4vw, 2rem);
  font-weight: 900;
  line-height: 1.28;
}

.slide-loop .bottom-note {
  color: var(--text-light);
  background: rgba(255, 255, 255, 0.08);
}

.triad {
  margin-top: clamp(1.4rem, 4vh, 3rem);
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(0.7rem, 1.6vw, 1.4rem);
  max-width: min(90vw, 1180px);
}

.triad article {
  min-height: clamp(250px, 43vh, 390px);
  padding: clamp(1rem, 2vw, 1.55rem);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.triad span {
  color: var(--gold);
  font-size: var(--small-size);
  font-weight: 800;
}

.triad h2 {
  color: var(--blue);
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2.6rem);
  font-weight: 800;
  line-height: 1.05;
}

.triad p {
  color: var(--text-mid);
  font-size: var(--body-size);
  line-height: 1.5;
}

.compare-grid {
  margin-top: clamp(1.2rem, 3.8vh, 2.7rem);
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(90px, 0.22fr) minmax(0, 1fr);
  gap: clamp(0.8rem, 2vw, 1.7rem);
  align-items: center;
  max-width: min(90vw, 1160px);
}

.compare-card {
  min-height: clamp(260px, 43vh, 380px);
  padding: clamp(1rem, 2.2vw, 1.7rem);
}

.compare-card.new {
  border-left: 5px solid var(--gold);
}

.compare-card h2 {
  margin-top: clamp(0.6rem, 1.5vh, 1rem);
  color: var(--text-light);
  font-family: var(--font-display);
  font-size: var(--h2-size);
  font-weight: 800;
  line-height: 1.08;
}

.compare-card ul {
  margin: clamp(1rem, 2.3vh, 1.7rem) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: clamp(0.35rem, 0.9vh, 0.65rem);
}

.compare-card li {
  position: relative;
  padding-left: 1.05em;
  color: rgba(247, 251, 255, 0.84);
  font-size: var(--body-size);
  font-weight: 700;
  line-height: 1.35;
}

.compare-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 0.45em;
  height: 0.45em;
  background: var(--gold);
  transform: rotate(45deg);
}

.bridge {
  display: grid;
  place-items: center;
  min-height: clamp(60px, 12vh, 100px);
  border-top: 1px solid var(--gold);
  border-bottom: 1px solid var(--gold);
  color: var(--gold);
  font-size: var(--small-size);
  font-weight: 800;
  line-height: 1.35;
  text-align: center;
}

.flow-row {
  margin-top: clamp(1.3rem, 4vh, 3rem);
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: clamp(0.45rem, 1vw, 0.8rem);
  max-width: min(92vw, 1220px);
}

.flow-row article {
  position: relative;
  min-height: clamp(160px, 26vh, 230px);
  padding: clamp(0.75rem, 1.4vw, 1rem);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.flow-row article::after {
  content: "→";
  position: absolute;
  right: -0.8rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--gold);
  font-weight: 800;
  z-index: 2;
}

.flow-row article:last-child::after {
  content: "";
}

.flow-row span {
  color: var(--gold);
  font-size: var(--small-size);
  font-weight: 800;
}

.flow-row strong {
  color: var(--text-light);
  font-size: clamp(1rem, 1.75vw, 1.55rem);
  line-height: 1.18;
}

.flow-row .is-highlight {
  border-color: rgba(198, 161, 91, 0.52);
  border-left: 5px solid var(--gold);
}

.map-wrap {
  position: relative;
  width: min(92vw, 1160px);
  height: min(52vh, 440px);
  margin-top: clamp(1rem, 2vh, 1.7rem);
}

.map-core,
.map-node {
  position: absolute;
  display: grid;
  place-items: center;
  text-align: center;
}

.map-core {
  left: 50%;
  top: 50%;
  width: clamp(220px, 24vw, 340px);
  height: clamp(108px, 17vh, 155px);
  transform: translate(-50%, -50%);
  border: 1px solid rgba(198, 161, 91, 0.52);
  border-left: 6px solid var(--gold);
  border-radius: var(--radius);
  background: rgba(8, 28, 51, 0.92);
  color: var(--text-light);
  box-shadow: var(--shadow);
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3vw, 2.45rem);
  font-weight: 800;
  line-height: 1.1;
}

.map-node {
  width: clamp(130px, 15vw, 185px);
  min-height: clamp(58px, 9vh, 80px);
  padding: 0.5rem;
  color: rgba(247, 251, 255, 0.88);
  font-size: clamp(0.85rem, 1.25vw, 1.05rem);
  font-weight: 800;
}

.node-1 { left: 5%; top: 8%; }
.node-2 { left: 25%; top: 0; }
.node-3 { right: 25%; top: 0; }
.node-4 { right: 5%; top: 8%; }
.node-5 { left: 5%; bottom: 8%; }
.node-6 { left: 25%; bottom: 0; }
.node-7 { right: 25%; bottom: 0; }
.node-8 { right: 5%; bottom: 8%; }

.steps {
  position: relative;
  width: min(92vw, 1180px);
  height: min(50vh, 410px);
  margin-top: clamp(1.4rem, 3vh, 2.2rem);
}

.steps article {
  position: absolute;
  left: calc(var(--i) * 15.5%);
  bottom: calc(var(--i) * clamp(24px, 5vh, 42px));
  width: clamp(150px, 16vw, 220px);
  min-height: clamp(86px, 14vh, 116px);
  padding: clamp(0.7rem, 1.4vw, 1rem);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.steps span {
  color: var(--gold);
  font-size: var(--small-size);
  font-weight: 800;
}

.steps strong {
  color: var(--text-light);
  font-size: clamp(0.95rem, 1.6vw, 1.35rem);
  line-height: 1.2;
}

.checklist-grid {
  margin-top: clamp(1.3rem, 4vh, 2.8rem);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(0.75rem, 1.7vw, 1.35rem);
  max-width: min(90vw, 1120px);
}

.checklist-grid article {
  min-height: clamp(118px, 19vh, 160px);
  padding: clamp(1rem, 2vw, 1.5rem);
}

.quote-line {
  max-width: min(84vw, 1050px);
}

@keyframes slide-in {
  from {
    opacity: 0;
    transform: translateY(24px);
    filter: blur(2px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
    filter: blur(0);
  }
}

@media (max-height: 700px) {
  :root {
    --title-size: clamp(1.7rem, 4.4vw, 3rem);
    --h2-size: clamp(1.2rem, 3vw, 2rem);
    --body-size: clamp(0.72rem, 1.2vw, 0.95rem);
    --slide-padding: clamp(0.9rem, 3vw, 2rem);
  }

  .deck-nav {
    display: none;
  }
}

@media (max-width: 760px) {
  .concept-grid,
  .compare-grid,
  .triad,
  .checklist-grid {
    grid-template-columns: 1fr;
  }

  .bridge {
    min-height: 42px;
  }

  .flow-row {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}