* {
  box-sizing: border-box;
}

:root {
  color-scheme: dark;
  --night-950: #02060d;
  --night-900: #050a12;
  --night-850: #07101b;
  --night-800: #091421;
  --silver-100: #f1eee7;
  --silver-300: #c8d0d7;
  --silver-500: #aeb8c2;
  --silver-700: #53606b;
  --gold-300: #ead6a3;
  --gold-500: #d2ae65;
  --focus: #f0d88e;
}

html {
  min-width: 280px;
  overflow-x: clip;
  background: var(--night-950);
  color: var(--silver-100);
  font-family: Manrope, system-ui, sans-serif;
}

body {
  min-width: 280px;
  min-height: 100vh;
  margin: 0;
  overflow-x: clip;
  background:
    linear-gradient(rgba(2, 6, 13, 0.82), rgba(2, 6, 13, 0.95)),
    url("./assets/vertical-tree-background-v1.webp") center / cover fixed;
}

button,
select {
  min-height: 44px;
  font: inherit;
}

button {
  cursor: pointer;
}

button:focus-visible,
select:focus-visible,
a:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
}

[hidden] {
  display: none !important;
}

.shell {
  width: min(1480px, 100%);
  max-width: 100vw;
  margin: 0 auto;
  padding: clamp(20px, 4.5vw, 64px) clamp(12px, 3.5vw, 52px);
}

h1,
h2,
h3,
.lead,
.story p:not(.kicker),
.branch strong {
  font-family:
    Cormorant Garamond,
    Georgia,
    serif;
  font-weight: 500;
}

h1 {
  max-width: 18ch;
  margin: 8px 0 4px;
  font-size: clamp(2.9rem, 6.8vw, 6.4rem);
  line-height: 0.9;
}

h2 {
  margin: 0 0 14px;
  font-size: clamp(2rem, 4vw, 3.6rem);
  line-height: 1;
}

h3 {
  margin: 0;
}

p,
li,
dd {
  line-height: 1.58;
}

.eyebrow,
.kicker {
  margin: 0;
  color: var(--silver-300);
  font-size: 0.8rem;
  font-weight: 650;
  letter-spacing: 0.14em;
  line-height: 1.35;
  text-transform: uppercase;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.topbar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, auto);
  gap: clamp(24px, 5vw, 68px);
  align-items: end;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--silver-700);
}

.group-label {
  margin: 14px 0 0;
  color: var(--silver-300);
  font-family:
    Cormorant Garamond,
    Georgia,
    serif;
  font-size: clamp(1.2rem, 2vw, 1.55rem);
}

.review-badge {
  display: inline-flex;
  margin-top: 15px;
  padding: 5px 8px;
  border: 1px solid rgba(210, 174, 101, 0.4);
  color: #cdbb90;
  font-size: 0.72rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.card-nav {
  display: grid;
  gap: 10px;
  justify-items: end;
}

.card-nav-main {
  display: grid;
  grid-template-columns: auto minmax(190px, 320px) auto;
  gap: 10px;
  align-items: center;
  width: 100%;
}

.card-nav button,
.mode-tab,
.description-toggle,
.about-layout-toggle {
  border: 1px solid var(--silver-700);
  background: rgba(5, 10, 18, 0.62);
  color: var(--silver-100);
  padding: 10px 14px;
}

.card-nav button:hover,
.mode-tab:hover,
.description-toggle:hover,
.about-layout-toggle:hover {
  border-color: #89949f;
  background: rgba(13, 24, 38, 0.82);
}

.card-select-label,
.card-nav select {
  width: 100%;
  min-width: 0;
}

.card-nav select {
  padding: 9px 34px 9px 12px;
  border: 1px solid var(--silver-700);
  background: #09111d;
  color: var(--silver-100);
}

.sound-toggle {
  justify-self: end;
  white-space: nowrap;
}

.mode-tabs {
  display: flex;
  gap: 10px;
  margin: 28px 0 24px;
}

.mode-tab {
  min-width: 138px;
}

.mode-tab.is-active {
  border-color: #c9a86a;
  color: var(--gold-300);
  box-shadow: inset 0 -2px 0 var(--gold-500);
}

.about-view-controls {
  display: none;
  gap: 12px;
  align-items: center;
  margin: 0 0 24px;
}

.about-view-controls span {
  color: var(--silver-500);
  font-size: 0.86rem;
}

.about-layout-toggle {
  color: var(--gold-300);
}

.about-panel {
  min-width: 0;
}

.card-data-loading,
.card-data-error {
  min-height: min(68vh, 720px);
  padding: clamp(52px, 9vw, 110px) 0;
  text-align: center;
}

.card-data-loading span {
  display: block;
  width: min(72vw, 290px);
  aspect-ratio: 2 / 3;
  margin: 0 auto 28px;
  border: 1px solid rgba(210, 174, 101, 0.2);
  background: linear-gradient(110deg, rgba(12, 23, 37, 0.62) 30%, rgba(34, 48, 64, 0.72) 44%, rgba(12, 23, 37, 0.62) 58%);
  background-size: 220% 100%;
  animation: card-data-shimmer 1.4s ease-in-out infinite;
}

.card-data-loading strong,
.card-data-error h2 {
  display: block;
  color: var(--silver-100);
  font-family: Cormorant Garamond, Georgia, serif;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
}

.card-data-loading p,
.card-data-error p {
  color: var(--silver-500);
}

.card-data-error button {
  margin-top: 18px;
  color: var(--gold-300);
}

@keyframes card-data-shimmer {
  to { background-position: -120% 0; }
}

.about-intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 5vw, 64px);
  align-items: start;
  padding: 20px 0 42px;
}

.poster-wrap,
.card-level-deal {
  position: relative;
  max-width: 340px;
  padding: 0 14px 18px 0;
}

.poster-wrap {
  width: min(78vw, 340px);
  margin: 0 auto;
}

.dealt-card,
.deck-stack img {
  display: block;
  width: 100%;
  height: auto;
}

.deal-scene {
  isolation: isolate;
}

.deck-stack {
  position: absolute;
  z-index: 0;
  top: clamp(22px, 7%, 44px);
  right: 0;
  width: calc(100% - 14px);
  opacity: 0.72;
  transform: rotate(3.5deg) translate(6px, 8px);
  transform-origin: 55% 80%;
  filter: drop-shadow(0 20px 24px #000b) saturate(0.78) brightness(0.72);
  pointer-events: none;
}

.dealt-card {
  position: relative;
  z-index: 1;
  transform: rotate(-3deg);
  transform-origin: 52% 86%;
  filter: drop-shadow(0 20px 28px #000a);
  will-change: transform, opacity, filter;
}

.deal-scene.is-dealing .dealt-card {
  animation: card-deal-v1 820ms cubic-bezier(0.18, 0.72, 0.16, 1) both;
}

.deal-scene.is-dealing .deck-stack {
  animation: deck-receive-v1 820ms ease-out both;
}

@keyframes card-deal-v1 {
  0% {
    opacity: 0.18;
    transform: translate3d(13%, 10%, 0) rotate(3.5deg) scale(0.9);
    filter: drop-shadow(0 8px 12px #0008) brightness(0.62);
  }
  70% {
    opacity: 1;
    transform: translate3d(-1.8%, -1.2%, 0) rotate(-4.2deg) scale(1.008);
    filter: drop-shadow(0 24px 30px #000b) brightness(1);
  }
  100% {
    opacity: 1;
    transform: translate3d(0, 0, 0) rotate(-3deg) scale(1);
    filter: drop-shadow(0 20px 28px #000a) brightness(1);
  }
}

@keyframes deck-receive-v1 {
  0%,
  48% {
    transform: rotate(3.5deg) translate(6px, 8px);
  }
  72% {
    transform: rotate(3deg) translate(7px, 10px);
  }
  100% {
    transform: rotate(3.5deg) translate(6px, 8px);
  }
}

.about-copy {
  width: min(100%, 880px);
  min-width: 0;
}

.about-copy h2 {
  margin-top: 12px;
}

.lead {
  max-width: 31ch;
  margin: 20px 0;
  font-size: clamp(1.55rem, 3.2vw, 2.55rem);
  line-height: 1.12;
}

.short-description {
  max-width: 64ch;
  color: var(--silver-300);
  font-size: clamp(1rem, 1.5vw, 1.16rem);
}

.about-details {
  min-width: 0;
}

.practical-value {
  margin: 10px 0 38px;
}

.practical-value > h2,
.examples-section > h2,
.full-copy > h2 {
  font-size: clamp(1.85rem, 3vw, 2.7rem);
}

.value-benefit {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.value-benefit article {
  min-width: 0;
  padding: clamp(18px, 3vw, 26px);
  border-top: 1px solid rgba(210, 174, 101, 0.62);
  background: linear-gradient(145deg, rgba(12, 23, 37, 0.82), rgba(4, 10, 18, 0.46));
}

.value-benefit article > p:last-child {
  margin-bottom: 0;
  font-size: clamp(1rem, 1.4vw, 1.13rem);
}

.semantic-summary {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin: 0 0 42px;
}

.semantic-summary > div {
  min-width: 0;
  padding-top: 13px;
  border-top: 1px solid var(--silver-700);
}

.semantic-summary dt,
.inspector dt {
  color: var(--silver-300);
  font-size: 0.8rem;
  font-weight: 650;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.semantic-summary dd,
.inspector dd {
  margin: 7px 0 0;
}

.comic-stories {
  display: grid;
  gap: clamp(32px, 5vw, 58px);
  margin: 28px 0 54px;
}

.comic-story {
  min-width: 0;
  container-type: inline-size;
}

.comic-story-heading {
  display: grid;
  gap: 6px;
  margin: 0 0 14px;
}

.comic-story-heading h3 {
  color: var(--gold-300);
  font-family: Manrope, system-ui, sans-serif;
  font-size: 0.86rem;
  font-weight: 650;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.comic-story-heading p {
  max-width: 58rem;
  margin: 0;
  color: var(--silver-500);
  font-size: 0.92rem;
}

.comic-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(8px, 1.2vw, 16px);
}

.comic-panel {
  display: flex;
  min-width: 0;
  margin: 0;
  flex-direction: column;
  background: rgba(7, 16, 27, 0.93);
  box-shadow: 0 14px 30px #0007;
}

.comic-panel img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
}

.comic-panel figcaption {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 7px 9px;
  align-items: start;
  padding: 11px 10px 14px;
  color: var(--silver-100);
  font-size: 14px;
  font-weight: 620;
  line-height: 1.4;
  hyphens: none;
  overflow-wrap: break-word;
  word-break: normal;
}

.comic-index {
  color: var(--gold-500);
  font-size: 13px;
  letter-spacing: 0.08em;
}

.comic-caption {
  min-width: 0;
}

.comic-panel figcaption small {
  grid-column: 1 / -1;
  color: var(--silver-500);
  font-size: 14px;
  font-weight: 450;
  line-height: 1.45;
}

@container (min-width: 680px) {
  .comic-story--keywords .comic-strip,
  .comic-story--motifs .comic-strip {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@container (min-width: 981px) {
  .comic-story--tension .comic-strip {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.examples-section {
  margin: 52px 0 44px;
}

.examples {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  padding: 0;
  list-style: none;
}

.examples li {
  display: grid;
  gap: 6px;
  min-width: 0;
  padding: 16px 18px;
  border-left: 2px solid #c9a86a;
  background: rgba(9, 17, 29, 0.82);
}

.examples li span {
  color: var(--silver-300);
}

.full-copy {
  max-width: 78ch;
  padding-top: 24px;
  border-top: 1px solid var(--silver-700);
}

.full-copy p {
  font-family:
    Cormorant Garamond,
    Georgia,
    serif;
  font-size: clamp(1.24rem, 1.8vw, 1.55rem);
  line-height: 1.52;
}

.story {
  position: relative;
  isolation: isolate;
  width: min(1060px, 100%);
  margin: 12px auto 34px;
  padding: clamp(24px, 4vw, 38px) clamp(20px, 6vw, 72px);
  border: 0;
  background: transparent;
  text-align: center;
}

.story::before {
  position: absolute;
  z-index: -1;
  inset: 0;
  content: "";
  background:
    linear-gradient(
      90deg,
      rgba(4, 10, 18, 0.28),
      rgba(4, 10, 18, 0.86) 16%,
      rgba(4, 10, 18, 0.86) 84%,
      rgba(4, 10, 18, 0.28)
    ),
    url("./assets/story-request-frame-left-v3.webp") left center / auto 100% no-repeat,
    url("./assets/story-request-frame-right-v2.webp") right center / auto 100% no-repeat,
    url("./assets/story-request-frame-center-v2.webp") center / auto 100% repeat-x;
}

.story p:not(.kicker) {
  max-width: 35ch;
  margin: 12px auto;
  font-size: clamp(1.45rem, 3vw, 2.45rem);
  line-height: 1.12;
}

.story small {
  display: block;
  max-width: 68ch;
  margin: 0 auto;
  color: var(--silver-300);
  font-size: 0.94rem;
  line-height: 1.5;
}

.tree {
  position: relative;
  min-width: 0;
  padding-top: 18px;
}

.card-level {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  align-items: start;
  width: min(1100px, 100%);
  margin: 0 auto;
}

.card-level-deal {
  width: min(72vw, 320px);
  margin: 0 auto;
}

.card-level-copy {
  min-width: 0;
  max-width: 740px;
}

.card-level-copy h2,
.inspector h2 {
  margin: 10px 0 18px;
}

.card-line {
  color: var(--gold-300);
  font-family:
    Cormorant Garamond,
    Georgia,
    serif;
  font-size: clamp(1.3rem, 2.4vw, 1.75rem);
}

.description-toggle {
  margin-top: 10px;
  color: var(--gold-300);
}

.full-description {
  max-width: 68ch;
  margin-top: 16px;
  font-family:
    Cormorant Garamond,
    Georgia,
    serif;
  font-size: clamp(1.12rem, 1.7vw, 1.42rem);
  line-height: 1.48;
}

.edges {
  position: absolute;
  z-index: 1;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
  pointer-events: none;
}

.edges--desktop {
  display: none;
}

.edges path {
  fill: none;
  stroke: #aeb9c3;
  stroke-width: 1.25;
  opacity: 0.35;
  vector-effect: non-scaling-stroke;
}

.edges path.is-active {
  stroke: var(--gold-500);
  stroke-width: 2;
  opacity: 1;
  filter: drop-shadow(0 0 4px rgba(210, 174, 101, 0.55));
}

.route-marker-track {
  fill: none;
  stroke: none !important;
  opacity: 0 !important;
}

.route-marker {
  opacity: 0;
  fill: var(--gold-300);
  pointer-events: none;
}

.route-marker.is-moving {
  opacity: 1;
  filter:
    drop-shadow(0 0 5px var(--gold-500))
    drop-shadow(0 0 11px rgba(210, 174, 101, 0.52));
}

.branches {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: 112px;
  padding-left: clamp(38px, 9vw, 54px);
}

.branch {
  display: flex;
  min-width: 0;
  min-height: 176px;
  padding: 24px 20px;
  flex-direction: column;
  justify-content: space-between;
  text-align: left;
  border: 1px solid transparent;
  background:
    linear-gradient(180deg, rgba(4, 10, 18, 0.48), rgba(4, 10, 18, 0.72)),
    var(--branch-image) center / cover no-repeat;
  color: var(--silver-100);
  box-shadow: 0 18px 38px rgba(0, 0, 0, 0.38);
}

.branch:hover,
.branch:focus-visible {
  background:
    linear-gradient(180deg, rgba(4, 10, 18, 0.42), rgba(4, 10, 18, 0.68)),
    var(--branch-image) center / cover no-repeat;
}

.branch.is-selected {
  color: var(--gold-300);
  box-shadow:
    inset 0 0 0 1px rgba(210, 174, 101, 0.58),
    0 18px 38px rgba(0, 0, 0, 0.42),
    0 0 24px rgba(210, 174, 101, 0.12);
}

.branch strong {
  display: block;
  margin: 18px 0;
  color: var(--silver-100);
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  line-height: 1.08;
  overflow-wrap: break-word;
}

.branch-state {
  color: var(--silver-300);
  font-size: 0.88rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  line-height: 1.35;
  text-transform: uppercase;
}

.branch.is-selected .branch-state {
  color: var(--gold-300);
}

.inspector {
  width: min(940px, 100%);
  margin: 36px 0 0;
  padding: 26px 0;
  border-top: 1px solid var(--silver-700);
}

.inspector.is-neutral {
  color: var(--silver-300);
}

.inspector h2 {
  max-width: 24ch;
  font-size: clamp(2rem, 4vw, 3.2rem);
}

.inspector dl {
  display: grid;
  gap: 16px;
  margin: 28px 0 0;
}

.inspector dl > div {
  padding-top: 12px;
  border-top: 1px solid rgba(83, 96, 107, 0.74);
}

.inspector ul {
  margin: 0;
  padding-left: 1.2rem;
}

.boundary-note {
  margin: 44px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--silver-700);
  color: var(--silver-500);
  font-size: 0.9rem;
}

@media (min-width: 700px) {
  .value-benefit {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .semantic-summary {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .card-level {
    grid-template-columns: minmax(200px, 280px) minmax(0, 1fr);
    gap: clamp(28px, 5vw, 58px);
    align-items: start;
  }

  .card-level-deal {
    width: 100%;
    max-width: 280px;
    margin: 0;
  }
}

@media (min-width: 981px) {
  .edges--desktop {
    display: block;
  }

  .edges--mobile {
    display: none;
  }

  .card-level {
    grid-template-columns: minmax(280px, 360px) minmax(0, 1fr);
    gap: clamp(46px, 7vw, 104px);
    align-items: start;
  }

  .card-level-deal {
    max-width: 360px;
  }

  .branches {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(14px, 2vw, 26px);
    margin-top: 158px;
    padding-left: 0;
  }

  .branch {
    min-height: 230px;
  }

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

@media (min-width: 1180px) {
  .about-view-controls {
    display: flex;
  }

  .about-panel.is-desktop-view .about-intro {
    grid-template-columns: minmax(330px, 430px) minmax(0, 1fr);
    gap: clamp(48px, 7vw, 110px);
    align-items: start;
  }

  .about-panel.is-desktop-view .poster-wrap {
    width: 100%;
    max-width: 420px;
    margin: 0;
  }

  .about-panel.is-desktop-view .about-copy {
    max-width: 920px;
    padding-top: clamp(12px, 3vw, 54px);
  }

  .about-panel.is-compact-view {
    width: min(820px, 100%);
    margin: 0 auto;
  }

  .about-panel.is-compact-view .about-intro {
    grid-template-columns: minmax(0, 1fr);
  }

  .about-panel.is-compact-view .poster-wrap {
    width: min(360px, 76vw);
  }
}

@media (max-width: 1080px) {
  .topbar {
    grid-template-columns: minmax(0, 1fr);
    align-items: start;
  }

  .card-nav {
    justify-items: stretch;
    width: 100%;
  }

  .sound-toggle {
    justify-self: start;
  }
}

@media (max-width: 699px) {
  .shell {
    padding-inline: 12px;
  }

  .topbar {
    gap: 22px;
  }

  .card-nav-main {
    grid-template-columns: 44px minmax(0, 1fr) 44px;
    gap: 8px;
  }

  .card-nav-main button {
    padding-inline: 8px;
  }

  .nav-label {
    display: none;
  }

  .mode-tabs {
    width: 100%;
  }

  .mode-tab {
    min-width: 0;
    flex: 1 1 50%;
  }

  .about-intro {
    padding-top: 8px;
  }

  .poster-wrap {
    width: min(76vw, 310px);
  }

  .story {
    padding-inline: 20px;
  }

  .story::before {
    background:
      linear-gradient(
        90deg,
        rgba(4, 10, 18, 0.2),
        rgba(4, 10, 18, 0.88) 20%,
        rgba(4, 10, 18, 0.88) 80%,
        rgba(4, 10, 18, 0.2)
      ),
      url("./assets/story-request-frame-left-v3.webp") left center / auto 100% no-repeat,
      url("./assets/story-request-frame-right-v2.webp") right center / auto 100% no-repeat,
      url("./assets/story-request-frame-center-v2.webp") center / auto 100% repeat-x;
  }

  .card-level-copy {
    width: 100%;
  }

  .branches {
    margin-top: 104px;
  }
}

@media (max-width: 360px) {
  .comic-strip {
    gap: 7px;
  }

  .comic-panel figcaption {
    padding-inline: 8px;
  }

  .branches {
    padding-left: 38px;
  }
}