:root {
  color-scheme: dark;
  --background: #070b0e;
  --surface: #0b1014;
  --surface-strong: #0f151a;
  --surface-selected: #101820;
  --foreground: #f4f6f7;
  --muted: #9aa3aa;
  --subtle: #667079;
  --border: #2a3339;
  --border-strong: #3d4951;
  --blue: #62a2ff;
  --blue-soft: #101c29;
  --green: #82c98a;
  --green-soft: #0d1b14;
  --amber: #f2b735;
  --amber-soft: #211a0b;
  --red: #ff7d78;
  --red-soft: #211010;
  --font-sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --header-height: 78px;
  --footer-height: 78px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --transition: 180ms ease;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--background);
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  min-height: 100dvh;
  margin: 0;
  overflow: hidden;
  background: var(--background);
  color: var(--foreground);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

button,
a,
summary {
  font: inherit;
}

button {
  color: inherit;
}

button,
summary,
a {
  -webkit-tap-highlight-color: transparent;
}

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

button:disabled {
  cursor: not-allowed;
  opacity: 0.4;
}

svg {
  display: block;
  width: 1.25em;
  height: 1.25em;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}

code,
pre {
  font-family: var(--font-mono);
}

[hidden] {
  display: none !important;
}

.icon-definitions {
  position: fixed;
  width: 0;
  height: 0;
  overflow: hidden;
}

.app-header {
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 0 clamp(24px, 3.5vw, 56px);
  border-bottom: 1px solid var(--border);
  background: var(--background);
}

.wordmark {
  padding: 0;
  border: 0;
  background: transparent;
  color: #c9ced2;
  cursor: pointer;
  font-size: clamp(15px, 1.35vw, 19px);
  font-weight: 450;
  letter-spacing: -0.02em;
}

.wordmark:hover {
  color: var(--foreground);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 20px;
}

.version-label {
  color: var(--muted);
  font-size: 14px;
}

.version-label strong {
  color: var(--green);
  font-weight: 600;
}

.explore-button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 14px;
}

.explore-button svg {
  width: 17px;
  height: 17px;
}

.explore-button:hover {
  border-color: var(--border);
  color: var(--foreground);
}

.progress-control {
  height: 46px;
  display: grid;
  grid-template-columns: 46px auto 46px;
  align-items: stretch;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.progress-control button {
  display: grid;
  place-items: center;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
}

.progress-control button:hover:not(:disabled) {
  background: var(--surface-strong);
}

.progress-control button:first-child {
  border-right: 1px solid var(--border);
}

.progress-control button:last-child {
  border-left: 1px solid var(--border);
}

.progress-control svg {
  width: 18px;
  height: 18px;
}

.progress-value {
  min-width: 104px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.progress-value strong {
  color: var(--blue);
  font-size: 18px;
  font-weight: 600;
}

.presentation {
  height: calc(100dvh - var(--header-height) - var(--footer-height));
  min-height: 0;
  overflow: hidden;
}

.slide {
  height: 100%;
  overflow: auto;
  padding: clamp(34px, 5vh, 56px) clamp(28px, 4.5vw, 72px) clamp(28px, 4vh, 42px);
  scrollbar-width: thin;
  scrollbar-color: var(--border-strong) transparent;
}

.slide.is-active {
  animation: slide-enter 240ms ease both;
}

@keyframes slide-enter {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.slide-heading {
  margin-bottom: clamp(26px, 4vh, 42px);
}

.slide-heading-inline {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 36px;
}

.slide h1,
.slide h2,
.slide h3,
.slide p {
  margin-top: 0;
}

.slide h2 {
  max-width: 1100px;
  margin-bottom: 10px;
  font-size: clamp(38px, 4.2vw, 66px);
  font-weight: 650;
  letter-spacing: -0.055em;
  line-height: 1.02;
}

.slide-heading > p,
.slide-heading > div > p {
  max-width: 760px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: clamp(16px, 1.6vw, 22px);
  line-height: 1.45;
}

.button {
  min-height: 52px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  padding: 0 24px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--foreground);
  cursor: pointer;
  text-decoration: none;
  transition:
    border-color var(--transition),
    background var(--transition),
    color var(--transition);
}

.button svg {
  width: 20px;
  height: 20px;
}

.button-primary {
  border-color: var(--blue);
  background: var(--blue);
  color: #07101b;
  font-weight: 650;
}

.button-primary:hover {
  background: #8abaff;
}

.button-secondary:hover {
  border-color: var(--blue);
  color: var(--blue);
}

.quiet-link,
.source-link {
  color: var(--muted);
  text-decoration: none;
}

.quiet-link:hover,
.source-link:hover {
  color: var(--foreground);
}

.detail-label {
  display: block;
  margin-bottom: 8px;
  color: var(--subtle);
  font-size: 12px;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* Cover */

.slide-cover {
  display: grid;
  grid-template-columns: minmax(320px, 0.85fr) minmax(520px, 1.25fr);
  align-items: center;
  gap: clamp(48px, 6vw, 96px);
}

.cover-copy h1 {
  margin: 0 0 26px;
  font-size: clamp(58px, 6.2vw, 94px);
  font-weight: 680;
  letter-spacing: -0.065em;
  line-height: 0.98;
}

.cover-copy > p {
  max-width: 620px;
  margin-bottom: 36px;
  color: var(--muted);
  font-size: clamp(18px, 1.65vw, 24px);
  line-height: 1.5;
}

.cover-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 24px;
}

.source-link {
  width: max-content;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  border-bottom: 1px dashed var(--subtle);
  padding-bottom: 4px;
}

.source-link svg {
  width: 16px;
  height: 16px;
}

.cover-diagram {
  position: relative;
  min-height: 470px;
  display: grid;
  grid-template-columns: minmax(130px, 0.9fr) 42px minmax(185px, 1.1fr) 42px minmax(130px, 0.9fr);
  grid-template-rows: 230px 34px 130px auto;
  align-items: center;
  gap: 0;
}

.diagram-card {
  min-height: 156px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
  padding: 20px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  background: var(--surface);
  cursor: pointer;
  text-align: center;
  transition:
    border-color 160ms ease,
    background-color 160ms ease,
    transform 160ms ease;
}

.diagram-card:hover,
.diagram-card:focus-visible {
  border-color: var(--blue);
  transform: translateY(-2px);
}

.diagram-card svg {
  width: 38px;
  height: 38px;
  color: var(--blue);
}

.diagram-card span {
  font-size: 17px;
  font-weight: 600;
}

.diagram-card small {
  color: var(--green);
  font-size: 12px;
}

.diagram-card-core {
  min-height: 220px;
  border-color: color-mix(in srgb, var(--green) 68%, var(--border));
  background: var(--green-soft);
}

.diagram-card-core svg {
  color: var(--green);
}

.connector {
  position: relative;
  height: 2px;
  background: var(--blue);
}

.connector::after,
.track-arrow::after,
.diagnostic-arrow::after {
  content: "";
  position: absolute;
  top: 50%;
  right: 0;
  width: 8px;
  height: 8px;
  border-top: 2px solid currentColor;
  border-right: 2px solid currentColor;
  transform: translateY(-50%) rotate(45deg);
}

.connector-active {
  color: var(--blue);
}

.cover-supports {
  position: relative;
  grid-column: 3;
  grid-row: 2 / 4;
  width: min(190%, 520px);
  justify-self: center;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 34px;
  padding-top: 44px;
}

.cover-branches {
  position: absolute;
  top: 0;
  right: calc(25% - 8.5px);
  left: calc(25% - 8.5px);
  height: 44px;
  color: rgba(88, 166, 255, 0.72);
  pointer-events: none;
}

.cover-branches i {
  position: absolute;
  display: block;
}

.branch-trunk {
  top: -16px;
  bottom: 22px;
  left: 50%;
  border-left: 1px solid currentColor;
}

.branch-bar {
  top: 22px;
  right: 0;
  left: 0;
  border-top: 1px solid currentColor;
}

.branch-drop {
  top: 22px;
  bottom: 0;
  border-left: 1px solid currentColor;
}

.branch-drop-left {
  left: 0;
}

.branch-drop-right {
  right: 0;
}

.diagram-card-small {
  min-height: 116px;
}

.diagram-card-small svg {
  width: 32px;
  height: 32px;
}

.diagram-card-database {
  width: 100%;
}

.diagram-card-monitoring {
  width: 100%;
}

.diagram-card-database svg {
  color: var(--green);
}

.diagram-card-monitoring svg {
  color: var(--amber);
}

.diagram-detail {
  grid-column: 1 / -1;
  min-height: 24px;
  margin: 18px 0 0;
  color: var(--muted);
  text-align: center;
}

/* Challenge */

.challenge-layout {
  display: grid;
  grid-template-columns: minmax(440px, 1.05fr) minmax(360px, 0.95fr);
  gap: clamp(50px, 8vw, 130px);
  align-items: center;
}

.challenge-options {
  border-top: 1px solid var(--border);
}

.challenge-option {
  width: 100%;
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 0 18px;
  padding: 24px 10px;
  border: 0;
  border-bottom: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  text-align: left;
}

.challenge-option > span {
  grid-row: 1 / 3;
  color: var(--subtle);
  font-family: var(--font-mono);
  font-size: 13px;
}

.challenge-option strong {
  color: var(--foreground);
  font-size: clamp(19px, 1.8vw, 26px);
  font-weight: 560;
}

.challenge-option small {
  margin-top: 5px;
  font-size: 14px;
}

.challenge-option:hover,
.challenge-option.is-selected {
  padding-left: 18px;
  background: var(--surface);
  color: var(--foreground);
}

.challenge-option.is-selected > span {
  color: var(--blue);
}

.challenge-focus {
  min-height: 330px;
  padding-left: clamp(30px, 4vw, 64px);
  border-left: 1px solid var(--border);
}

.focus-index {
  color: var(--blue);
  font-family: var(--font-mono);
  font-size: 13px;
}

.challenge-focus h3 {
  margin: 22px 0 18px;
  font-size: clamp(28px, 3vw, 44px);
  font-weight: 600;
  letter-spacing: -0.04em;
}

.challenge-focus > p {
  max-width: 560px;
  color: var(--muted);
  font-size: clamp(17px, 1.6vw, 22px);
  line-height: 1.55;
}

.principles {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin-top: 32px;
  padding-top: 22px;
  border-top: 1px solid var(--border);
  color: var(--green);
  font-size: 13px;
}

/* Architecture */

.segmented-control,
.scenario-control,
.simulator-controls {
  display: flex;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.segmented-control button,
.scenario-control button,
.simulator-controls button {
  min-height: 48px;
  padding: 0 22px;
  border: 0;
  border-right: 1px solid var(--border-strong);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  white-space: nowrap;
  transition:
    background-color 160ms ease,
    color 160ms ease;
}

.segmented-control button:last-child,
.scenario-control button:last-child,
.simulator-controls button:last-child {
  border-right: 0;
}

.segmented-control button:hover,
.segmented-control button.is-selected,
.scenario-control button:hover,
.scenario-control button.is-selected,
.simulator-controls button:hover,
.simulator-controls button.is-selected {
  background: var(--blue-soft);
  color: var(--blue);
}

.architecture-canvas {
  min-height: 370px;
  display: grid;
  align-items: center;
}

.arch-flow {
  display: grid;
  grid-template-columns: minmax(150px, 1fr) 52px minmax(110px, 0.7fr) 52px minmax(280px, 1.6fr) 52px minmax(110px, 0.7fr) 52px minmax(150px, 1fr);
  align-items: center;
}

.arch-stack {
  display: grid;
  gap: 14px;
}

.arch-node,
.arch-port,
.arch-context-node {
  min-height: 74px;
  display: flex;
  align-items: center;
  gap: 15px;
  padding: 14px 16px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  background: var(--surface);
  animation: ui-rise 220ms ease both;
}

.arch-node svg,
.arch-context-node svg {
  flex: 0 0 auto;
  width: 30px;
  height: 30px;
  color: var(--blue);
}

.arch-node span,
.arch-port span,
.arch-context-node span {
  font-weight: 560;
}

.arch-port {
  min-height: 126px;
  justify-content: center;
  color: var(--blue);
  text-align: center;
}

.arch-core {
  min-height: 240px;
  display: grid;
  grid-template-columns: 1fr 1px 1fr;
  align-items: center;
  gap: 22px;
  padding: 28px;
  border: 1px solid var(--green);
  border-radius: var(--radius-lg);
  background: var(--green-soft);
}

.arch-core-divider {
  width: 1px;
  height: 70%;
  background: color-mix(in srgb, var(--green) 45%, transparent);
}

.arch-core-node {
  display: grid;
  justify-items: center;
  gap: 16px;
  text-align: center;
}

.arch-core-node svg {
  width: 42px;
  height: 42px;
  color: var(--green);
}

.arch-core-node strong {
  font-size: 17px;
}

.arch-connector {
  position: relative;
  height: 2px;
  background: var(--blue);
  color: var(--blue);
}

.arch-connector::after {
  content: "";
  position: absolute;
  right: 0;
  top: 50%;
  width: 8px;
  height: 8px;
  border-top: 2px solid currentColor;
  border-right: 2px solid currentColor;
  transform: translateY(-50%) rotate(45deg);
}

.arch-context {
  display: grid;
  grid-template-columns: 1fr 60px 1.2fr 60px 1fr;
  align-items: center;
  gap: 18px;
}

.arch-context-platform {
  min-height: 230px;
  display: grid;
  place-items: center;
  gap: 14px;
  border-color: var(--green);
  background: var(--green-soft);
  text-align: center;
}

.arch-context-platform svg {
  width: 46px;
  height: 46px;
  color: var(--green);
}

.arch-context-side {
  display: grid;
  gap: 16px;
}

.canvas-caption {
  min-height: 26px;
  margin: 20px auto 0;
  color: var(--muted);
  text-align: center;
}

/* Journey */

.event-reference {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px 20px;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 12px;
}

.event-reference span:first-child {
  color: var(--blue);
}

.journey-track {
  display: grid;
  grid-template-columns: repeat(6, minmax(16px, 1fr) 34px) minmax(80px, 1fr);
  align-items: center;
  overflow-x: auto;
  padding: 20px 4px 24px;
}

.journey-step {
  min-width: 96px;
  min-height: 118px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 14px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  background: var(--surface);
  cursor: pointer;
}

.journey-step span {
  color: var(--subtle);
  font-family: var(--font-mono);
  font-size: 11px;
}

.journey-step strong {
  font-weight: 560;
}

.journey-step:hover,
.journey-step.is-selected {
  border-color: var(--blue);
  background: var(--blue-soft);
}

.journey-step.is-selected span,
.journey-step.is-selected strong {
  color: var(--blue);
}

.track-arrow,
.diagnostic-arrow {
  position: relative;
  height: 2px;
  background: var(--blue);
  color: var(--blue);
}

.journey-evidence {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.journey-evidence > div {
  min-height: 100px;
  padding: 20px 24px;
  border-right: 1px solid var(--border);
}

.journey-evidence > div:last-child {
  border-right: 0;
}

.journey-evidence strong {
  font-size: 16px;
  font-weight: 560;
}

.state-value {
  color: var(--green);
}

.worker-inset {
  display: grid;
  grid-template-columns: 150px 150px 1fr;
  align-items: center;
  gap: 14px;
  margin-top: 22px;
}

.worker-inset > div {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--muted);
  font-size: 12px;
}

.worker-inset strong {
  color: var(--blue);
  font-family: var(--font-mono);
  font-size: 11px;
}

.worker-inset p {
  margin: 0 0 0 14px;
  color: var(--muted);
  font-size: 13px;
}

/* Reliability */

.scenario-control {
  width: fit-content;
  margin: -16px 0 36px;
}

.scenario-control button {
  min-width: 104px;
}

.reliability-layout {
  display: grid;
  grid-template-columns: minmax(720px, 1fr) minmax(250px, 0.3fr);
  gap: clamp(40px, 5vw, 76px);
}

.reliability-flow {
  display: grid;
  grid-template-columns: repeat(4, minmax(28px, 1fr) 42px) minmax(110px, 1fr);
  align-items: center;
}

.flow-node {
  min-height: 158px;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 14px;
  padding: 18px 12px;
  border: 1px solid var(--blue);
  border-radius: var(--radius-md);
  background: var(--surface);
  text-align: center;
  animation: ui-rise 220ms ease both;
}

.reliability-flow .flow-node:nth-child(3) {
  animation-delay: 35ms;
}

.reliability-flow .flow-node:nth-child(5) {
  animation-delay: 70ms;
}

.reliability-flow .flow-node:nth-child(7) {
  animation-delay: 105ms;
}

.reliability-flow .flow-node:nth-child(9) {
  animation-delay: 140ms;
}

.flow-node.is-persisted {
  border-color: var(--green);
  background: var(--green-soft);
}

.flow-node svg {
  width: 38px;
  height: 38px;
  color: var(--blue);
}

.flow-node.is-persisted svg {
  color: var(--green);
}

.flow-node strong {
  font-size: 12px;
  font-weight: 560;
  letter-spacing: -0.015em;
  white-space: nowrap;
}

.flow-arrow {
  position: relative;
  height: 2px;
  background: var(--blue);
  color: var(--blue);
}

.flow-arrow::after {
  content: "";
  position: absolute;
  right: 0;
  top: 50%;
  width: 8px;
  height: 8px;
  border-top: 2px solid currentColor;
  border-right: 2px solid currentColor;
  transform: translateY(-50%) rotate(45deg);
}

.reliability-note {
  max-width: 620px;
  display: flex;
  align-items: center;
  gap: 20px;
  margin: 26px auto 0;
  padding: 18px 22px;
  border: 1px solid var(--amber);
  border-radius: var(--radius-md);
  background: var(--amber-soft);
}

.reliability-note.is-positive {
  border-color: var(--green);
  background: var(--green-soft);
}

.reliability-note.is-negative {
  border-color: var(--red);
  background: var(--red-soft);
}

.reliability-note svg {
  flex: 0 0 auto;
  width: 34px;
  height: 34px;
  color: var(--amber);
}

.reliability-note.is-positive svg {
  color: var(--green);
}

.reliability-note.is-negative svg {
  color: var(--red);
}

.reliability-note p {
  margin: 0;
  font-size: 16px;
}

.outcome-summary {
  margin: 0;
  padding-left: 28px;
  border-left: 1px solid var(--border);
}

.outcome-summary > div {
  padding: 6px 0 20px;
  border-bottom: 1px solid var(--border);
}

.outcome-summary > div + div {
  padding-top: 20px;
}

.outcome-summary dt {
  margin-bottom: 8px;
  color: var(--blue);
  font-size: 14px;
}

.outcome-summary dd {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  overflow-wrap: anywhere;
}

@media (min-width: 1181px) and (max-height: 800px) {
  .slide-reliability .slide-heading {
    margin-bottom: 22px;
  }

  .slide-reliability .scenario-control {
    margin-bottom: 26px;
  }

  .slide-reliability .flow-node {
    min-height: 146px;
  }

  .slide-reliability .reliability-note {
    margin-top: 20px;
    padding: 14px 20px;
  }

  .slide-reliability .outcome-summary > div {
    padding: 4px 0 12px;
  }

  .slide-reliability .outcome-summary > div + div {
    padding-top: 12px;
  }

  .slide-reliability .outcome-summary dt {
    margin-bottom: 4px;
  }
}

/* API */

.api-layout {
  display: grid;
  grid-template-columns: minmax(500px, 1fr) minmax(440px, 0.9fr);
  gap: clamp(44px, 6vw, 90px);
}

.endpoint-list {
  border-top: 1px solid var(--border);
}

.endpoint-row {
  width: 100%;
  min-height: 72px;
  display: grid;
  grid-template-columns: 64px 1fr auto;
  align-items: center;
  gap: 18px;
  padding: 14px 16px;
  border: 0;
  border-bottom: 1px solid var(--border);
  background: transparent;
  cursor: pointer;
  text-align: left;
}

.endpoint-row code {
  color: var(--foreground);
  font-size: 14px;
}

.endpoint-row > span:last-child {
  color: var(--muted);
  font-size: 13px;
}

.endpoint-row:hover,
.endpoint-row.is-selected {
  background: var(--surface);
}

.endpoint-row.is-selected {
  box-shadow: inset 2px 0 var(--blue);
}

.method {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
}

.method-get {
  color: var(--blue);
}

.method-post {
  color: var(--green);
}

.endpoint-detail {
  min-height: 110px;
  padding: 22px 16px;
}

.endpoint-detail p {
  max-width: 660px;
  margin: 0;
  color: var(--muted);
}

.tenant-path {
  padding-left: clamp(28px, 4vw, 60px);
  border-left: 1px solid var(--border);
}

.tenant-flow {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 28px;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 11px;
}

.tenant-flow span {
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.tenant-flow i {
  flex: 1;
  height: 1px;
  background: var(--blue);
}

.access-simulator {
  overflow: hidden;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
}

.simulator-controls {
  border: 0;
  border-bottom: 1px solid var(--border-strong);
  border-radius: 0;
}

.simulator-controls button {
  flex: 1;
}

.access-result {
  display: grid;
  gap: 14px;
  padding: 22px;
}

.access-result > div {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  color: var(--muted);
  font-size: 13px;
}

.access-result strong {
  color: var(--foreground);
  font-family: var(--font-mono);
  font-size: 12px;
}

.http-result {
  display: block;
  padding-top: 14px;
  border-top: 1px solid var(--border);
  color: var(--green);
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 650;
}

.http-result.is-not-found {
  color: var(--amber);
}

.access-explanation {
  margin: -4px 0 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.45;
}

.tenant-path pre,
.risk-detail pre {
  margin: 22px 0 0;
  padding: 18px 20px;
  overflow: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: #05080a;
  color: #b8d8ff;
  font-size: 12px;
  line-height: 1.6;
}

/* Operations */

.complaint {
  color: var(--muted) !important;
  font-size: clamp(20px, 2.2vw, 32px) !important;
}

.diagnostic-context {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
  color: var(--blue);
  font-size: 13px;
}

.diagnostic-context i {
  height: 1px;
  background: var(--blue);
}

.diagnostic-context span:last-child {
  color: var(--green);
}

.diagnostic-path {
  display: grid;
  grid-template-columns: repeat(5, minmax(110px, 1fr) 28px) minmax(120px, 1fr);
  align-items: center;
}

.diagnostic-path button {
  position: relative;
  min-height: 160px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 20px 12px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  background: var(--surface);
  cursor: pointer;
  text-align: center;
  transition:
    border-color 160ms ease,
    background-color 160ms ease,
    transform 160ms ease;
}

.diagnostic-path button > span {
  position: absolute;
  top: -28px;
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border: 1px solid var(--blue);
  border-radius: 50%;
  background: var(--background);
  color: var(--blue);
  font-family: var(--font-mono);
  font-size: 11px;
}

.diagnostic-path button svg {
  width: 36px;
  height: 36px;
  color: var(--blue);
}

.diagnostic-path button strong {
  font-size: 14px;
  font-weight: 560;
}

.diagnostic-path button small {
  color: var(--green);
  font-family: var(--font-mono);
  font-size: 10px;
  overflow-wrap: anywhere;
}

.diagnostic-path button:hover,
.diagnostic-path button.is-selected {
  border-color: var(--green);
  background: var(--green-soft);
}

.diagnostic-path button:hover {
  transform: translateY(-2px);
}

.diagnostic-path button.is-selected svg,
.diagnostic-path button.is-selected > span {
  color: var(--green);
  border-color: var(--green);
}

.diagnostic-detail {
  max-width: 640px;
  display: flex;
  align-items: center;
  gap: 18px;
  margin: 36px auto 14px;
  padding: 16px 20px;
  border: 1px solid var(--green);
  border-radius: var(--radius-md);
  background: var(--green-soft);
}

.diagnostic-detail svg {
  flex: 0 0 auto;
  width: 30px;
  height: 30px;
  color: var(--green);
}

.diagnostic-detail p {
  margin: 0;
  color: #d7ded9;
}

.privacy-note {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin: 0;
  color: var(--subtle);
  font-size: 12px;
}

.privacy-note svg {
  width: 15px;
  height: 15px;
}

/* Security */

.security-layout {
  display: grid;
  grid-template-columns: minmax(400px, 0.8fr) minmax(520px, 1.2fr);
  gap: clamp(44px, 6vw, 90px);
}

.risk-list {
  border-top: 1px solid var(--border);
}

.risk-row {
  width: 100%;
  display: grid;
  grid-template-columns: 54px 1fr;
  gap: 3px 18px;
  padding: 21px 16px;
  border: 0;
  border-bottom: 1px solid var(--border);
  background: transparent;
  cursor: pointer;
  text-align: left;
}

.risk-row > span {
  grid-row: 1 / 3;
  color: var(--blue);
  font-family: var(--font-mono);
  font-size: 13px;
}

.risk-row strong {
  font-size: 17px;
  font-weight: 560;
}

.risk-row small {
  color: var(--muted);
  font-size: 12px;
}

.risk-row:hover,
.risk-row.is-selected {
  background: var(--surface);
  box-shadow: inset 2px 0 var(--green);
}

.risk-detail {
  padding-left: clamp(24px, 3vw, 50px);
  border-left: 1px solid var(--border);
}

.risk-summary {
  display: grid;
  gap: 18px;
}

.risk-summary > div {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 22px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border);
}

.risk-summary span {
  color: var(--green);
  font-size: 13px;
}

.risk-summary p,
.risk-summary strong {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  font-weight: 450;
}

.public-api-considerations {
  margin-top: 24px;
  padding: 14px 18px;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.public-api-considerations summary {
  color: var(--muted);
  cursor: pointer;
  font-size: 13px;
}

.public-api-considerations p {
  max-width: 940px;
  margin: 14px 0 4px;
  color: var(--muted);
  font-size: 13px;
}

/* Confidence */

.confidence-layout {
  display: grid;
  grid-template-columns: minmax(520px, 1fr) minmax(460px, 1fr);
  gap: clamp(44px, 6vw, 88px);
}

.decision-panel {
  padding-right: clamp(24px, 3vw, 48px);
  border-right: 1px solid var(--border);
}

.decision-panel h3,
.quality-panel h3 {
  margin-bottom: 18px;
  font-size: 19px;
  font-weight: 600;
}

.decision-list {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.decision-row {
  width: 100%;
  min-height: 58px;
  display: flex;
  align-items: center;
  padding: 0 18px;
  border: 0;
  border-bottom: 1px solid var(--border);
  background: transparent;
  cursor: pointer;
  text-align: left;
}

.decision-row:last-child {
  border-bottom: 0;
}

.decision-row:hover,
.decision-row.is-selected {
  background: var(--green-soft);
}

.decision-row.is-selected {
  box-shadow: inset 2px 0 var(--green);
  color: var(--green);
}

.decision-detail {
  margin: 0;
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  border-left: 1px solid var(--border);
}

.decision-detail > div {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 18px;
  padding: 18px;
  border-bottom: 1px solid var(--border);
}

.decision-detail > div:last-child {
  border-bottom: 0;
}

.decision-detail dt {
  color: var(--green);
  font-size: 13px;
}

.decision-detail dd {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.quality-pipeline {
  position: relative;
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.quality-pipeline::before {
  content: "";
  position: absolute;
  top: 22px;
  bottom: 22px;
  left: 16px;
  width: 1px;
  background: var(--green);
}

.quality-pipeline button {
  position: relative;
  z-index: 1;
  width: 100%;
  min-height: 48px;
  display: grid;
  grid-template-columns: 34px 1fr auto;
  align-items: center;
  gap: 14px;
  padding: 6px 0;
  border: 0;
  border-bottom: 1px solid var(--border);
  background: transparent;
  cursor: pointer;
  text-align: left;
  transition:
    background-color 160ms ease,
    box-shadow 160ms ease;
}

.quality-pipeline button:hover span {
  color: var(--green);
}

.quality-pipeline button.is-selected {
  background: var(--green-soft);
  box-shadow: inset 2px 0 var(--green);
}

.quality-pipeline button.is-selected span,
.quality-pipeline button.is-selected small {
  color: var(--green);
}

.quality-pipeline button.is-selected svg {
  background: var(--green);
  color: var(--background);
}

.quality-pipeline svg {
  width: 32px;
  height: 32px;
  padding: 7px;
  border: 1px solid var(--green);
  border-radius: 50%;
  background: var(--background);
  color: var(--green);
}

.quality-pipeline small {
  color: var(--muted);
  font-size: 11px;
}

.quality-detail {
  min-height: 22px;
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 12px;
}

.quality-detail.is-updated,
.diagnostic-detail.is-updated {
  animation: feedback-enter 220ms ease both;
}

@keyframes ui-rise {
  from {
    opacity: 0;
    transform: translateY(5px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes feedback-enter {
  from {
    opacity: 0.55;
    transform: translateY(3px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Coverage */

.slide-coverage {
  display: grid;
  grid-template-columns: minmax(360px, 0.7fr) minmax(600px, 1.3fr);
  grid-template-rows: auto auto;
  align-content: center;
  gap: 34px clamp(60px, 8vw, 130px);
}

.coverage-intro h2 {
  margin-bottom: 20px;
  font-size: clamp(56px, 6vw, 92px);
}

.coverage-intro p {
  max-width: 520px;
  color: var(--muted);
  font-size: clamp(17px, 1.7vw, 24px);
}

.coverage-checklist {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--border);
}

.coverage-checklist span {
  min-height: 56px;
  display: flex;
  align-items: center;
  gap: 14px;
  border-bottom: 1px solid var(--border);
  color: #cbd1d5;
}

.coverage-checklist span:nth-child(odd) {
  border-right: 1px solid var(--border);
  padding-right: 24px;
}

.coverage-checklist span:nth-child(even) {
  padding-left: 24px;
}

.coverage-checklist svg {
  width: 20px;
  height: 20px;
  color: var(--green);
}

.coverage-actions {
  grid-column: 1 / -1;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.appendix-note {
  grid-column: 1 / -1;
  margin: -14px 0 0;
  color: var(--subtle);
  font-size: 12px;
}

/* Footer and explorer */

.presentation-footer {
  height: var(--footer-height);
  display: grid;
  grid-template-columns: minmax(220px, 1fr) minmax(180px, 0.5fr) minmax(220px, 1fr);
  align-items: center;
  gap: 30px;
  padding: 0 clamp(24px, 3.5vw, 56px);
  border-top: 1px solid var(--border);
}

.footer-navigation {
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 8px 0;
  border: 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  text-align: left;
}

.footer-navigation:hover:not(:disabled) {
  color: var(--foreground);
}

.footer-navigation svg {
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
}

.footer-navigation span {
  min-width: 0;
  display: grid;
}

.footer-navigation small {
  color: var(--subtle);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.footer-navigation strong {
  overflow: hidden;
  font-size: 13px;
  font-weight: 450;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.footer-next {
  justify-content: flex-end;
  text-align: right;
}

.progress-track {
  height: 2px;
  background: var(--border);
}

.progress-track span {
  display: block;
  width: 10%;
  height: 100%;
  background: var(--blue);
  transition: width var(--transition);
}

.explorer {
  width: min(720px, calc(100vw - 32px));
  max-height: min(760px, calc(100dvh - 32px));
  margin: auto;
  padding: 0;
  overflow: hidden;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  background: var(--surface-strong);
  color: var(--foreground);
}

.explorer::backdrop {
  background: rgb(0 0 0 / 72%);
}

.explorer-header {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}

.explorer-header > div {
  display: grid;
}

.explorer-header span {
  color: var(--blue);
  font-size: 12px;
}

.explorer-header strong {
  font-size: 16px;
  font-weight: 560;
}

.explorer-header button {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: transparent;
  cursor: pointer;
}

.explorer nav {
  max-height: calc(min(760px, 100dvh - 32px) - 76px);
  overflow: auto;
  padding: 8px 0;
}

.explorer nav button {
  width: 100%;
  min-height: 54px;
  display: grid;
  grid-template-columns: 42px 1fr;
  align-items: center;
  gap: 14px;
  padding: 0 20px;
  border: 0;
  background: transparent;
  cursor: pointer;
  text-align: left;
}

.explorer nav button:hover,
.explorer nav button.is-current {
  background: var(--blue-soft);
}

.explorer nav button span {
  color: var(--blue);
  font-family: var(--font-mono);
  font-size: 11px;
}

/* Responsive */

@media (max-width: 1180px) {
  body {
    overflow: auto;
  }

  .presentation {
    height: auto;
    min-height: calc(100dvh - var(--header-height) - var(--footer-height));
    overflow: visible;
  }

  .slide {
    min-height: calc(100dvh - var(--header-height) - var(--footer-height));
    height: auto;
    overflow: visible;
  }

  .slide-cover,
  .slide-coverage {
    grid-template-columns: 1fr;
  }

  .cover-diagram {
    width: min(760px, 100%);
    margin: 0 auto;
  }

  .challenge-layout,
  .api-layout,
  .security-layout,
  .confidence-layout,
  .reliability-layout {
    grid-template-columns: 1fr;
  }

  .challenge-focus,
  .tenant-path,
  .risk-detail,
  .outcome-summary,
  .decision-panel {
    padding: 24px 0 0;
    border-top: 1px solid var(--border);
    border-left: 0;
    border-right: 0;
  }

  .arch-flow,
  .diagnostic-path,
  .reliability-flow {
    min-width: 1000px;
  }

  .architecture-canvas,
  .diagnostic-path,
  .reliability-flow {
    overflow-x: auto;
    padding-bottom: 18px;
  }

  .slide-coverage {
    align-content: start;
  }

  .coverage-actions,
  .appendix-note {
    grid-column: 1;
  }
}

@media (max-width: 760px) {
  :root {
    --header-height: 64px;
    --footer-height: 70px;
  }

  .app-header,
  .presentation-footer {
    padding-right: 16px;
    padding-left: 16px;
  }

  .wordmark {
    max-width: 150px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .version-label,
  .explore-button span {
    display: none;
  }

  .header-actions {
    gap: 8px;
  }

  .explore-button {
    padding: 10px;
  }

  .progress-control {
    grid-template-columns: 38px auto 38px;
  }

  .progress-value {
    min-width: 76px;
    gap: 6px;
    font-size: 12px;
  }

  .progress-value strong {
    font-size: 15px;
  }

  .slide {
    padding: 30px 18px;
  }

  .slide h2 {
    font-size: clamp(34px, 12vw, 52px);
  }

  .slide-heading-inline {
    display: block;
  }

  .slide-heading-inline > :last-child {
    margin-top: 20px;
  }

  .slide-cover {
    gap: 48px;
  }

  .cover-copy h1 {
    font-size: clamp(54px, 18vw, 78px);
  }

  .cover-actions {
    display: grid;
  }

  .cover-diagram {
    min-height: auto;
    grid-template-columns: 1fr;
    grid-template-rows: auto;
    gap: 12px;
  }

  .connector,
  .cover-branches {
    display: none;
  }

  .cover-supports {
    grid-column: 1;
    grid-row: auto;
    width: 100%;
    grid-template-columns: 1fr;
    gap: 12px;
    padding-top: 0;
  }

  .diagram-card,
  .diagram-card-core,
  .diagram-card-small,
  .diagram-card-database,
  .diagram-card-monitoring {
    grid-column: 1;
    width: 100%;
    min-height: 100px;
  }

  .challenge-layout {
    gap: 30px;
  }

  .challenge-option {
    grid-template-columns: 40px 1fr;
  }

  .segmented-control,
  .scenario-control,
  .simulator-controls {
    width: 100%;
    overflow-x: auto;
  }

  .segmented-control button,
  .scenario-control button,
  .simulator-controls button {
    min-width: max-content;
    flex: 1;
  }

  .event-reference {
    justify-content: flex-start;
  }

  .journey-evidence {
    grid-template-columns: 1fr;
  }

  .journey-evidence > div {
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }

  .worker-inset {
    grid-template-columns: 1fr 1fr;
  }

  .worker-inset p {
    grid-column: 1 / -1;
    margin-left: 0;
  }

  .api-layout,
  .security-layout,
  .confidence-layout {
    gap: 32px;
  }

  .endpoint-row {
    grid-template-columns: 54px 1fr;
  }

  .endpoint-row > span:last-child {
    grid-column: 2;
  }

  .tenant-flow {
    display: grid;
    grid-template-columns: 1fr;
  }

  .tenant-flow i {
    width: 1px;
    height: 18px;
    justify-self: center;
  }

  .risk-summary > div,
  .decision-detail > div {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .coverage-checklist {
    grid-template-columns: 1fr;
  }

  .coverage-checklist span:nth-child(odd),
  .coverage-checklist span:nth-child(even) {
    padding: 0;
    border-right: 0;
  }

  .coverage-actions {
    display: grid;
  }

  .presentation-footer {
    grid-template-columns: 44px 1fr 44px;
    gap: 14px;
  }

  .footer-navigation {
    justify-content: center;
  }

  .footer-navigation span {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}