:root {
  --bg: #f7f4ee;
  --bg-soft: #fbfaf7;
  --panel: rgba(255, 255, 255, 0.84);
  --panel-strong: rgba(255, 255, 255, 0.94);
  --line: rgba(23, 77, 112, 0.12);
  --line-strong: rgba(23, 77, 112, 0.2);
  --text: #112331;
  --muted: #5e7687;
  --teal: #0e6a88;
  --teal-strong: #0a5974;
  --blue: #2b8fd8;
  --mint: #2abf98;
  --danger: #d85f5f;
  --shadow: 0 18px 45px rgba(24, 54, 80, 0.08);
  --radius-xl: 32px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --radius-sm: 14px;
  --max: 1260px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at top left, rgba(86, 177, 222, 0.15), transparent 32%),
    radial-gradient(circle at 90% 0%, rgba(170, 223, 212, 0.22), transparent 28%),
    linear-gradient(180deg, #fcfbf8 0%, #f7f4ee 48%, #f2efe8 100%);
  color: var(--text);
  font-family: "Segoe UI", "Inter", "Helvetica Neue", Arial, sans-serif;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

.page-shell {
  min-height: 100vh;
  overflow-x: clip;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  max-width: calc(var(--max) + 40px);
  margin: 0 auto;
  padding: 18px 20px 12px;
  backdrop-filter: blur(18px);
}

.topbar::before {
  content: "";
  position: absolute;
  inset: 8px 12px 0;
  border: 1px solid rgba(255, 255, 255, 0.62);
  border-radius: 24px;
  background: rgba(255, 250, 245, 0.72);
  box-shadow: 0 10px 28px rgba(25, 57, 87, 0.08);
  z-index: -1;
}

.brand-block {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 14px;
}

.brand-cube {
  width: 48px;
  height: 48px;
  border-radius: 16px;
  background:
    linear-gradient(135deg, rgba(15, 110, 136, 0.15), rgba(43, 143, 216, 0.08)),
    #fff;
  border: 1px solid rgba(14, 106, 136, 0.12);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.7);
  position: relative;
}

.brand-cube::before,
.brand-cube::after {
  content: "";
  position: absolute;
  border: 2px solid var(--teal);
  border-radius: 6px;
}

.brand-cube::before {
  inset: 11px 13px;
}

.brand-cube::after {
  inset: 17px 7px 5px 19px;
  opacity: 0.5;
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.brand-text strong {
  font-size: 1.05rem;
  letter-spacing: 0.01em;
}

.brand-text em,
.brand-note {
  color: var(--muted);
  font-style: normal;
  font-size: 0.93rem;
}

.chapter-nav {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.chapter-nav a {
  padding: 10px 14px;
  border-radius: 999px;
  font-size: 0.93rem;
  color: var(--muted);
  transition: 180ms ease;
}

.chapter-nav a:hover,
.chapter-nav a:focus-visible {
  background: rgba(14, 106, 136, 0.09);
  color: var(--teal-strong);
}

.layout {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
  padding: 26px 0 72px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(360px, 0.95fr);
  align-items: center;
  gap: 30px;
  padding: 42px;
  border-radius: 40px;
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.7);
  background:
    linear-gradient(130deg, rgba(255, 255, 255, 0.84), rgba(255, 255, 255, 0.68)),
    linear-gradient(135deg, rgba(226, 244, 247, 0.56), rgba(255, 247, 237, 0.62));
  box-shadow: var(--shadow);
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto -10% -35% 48%;
  height: 340px;
  background: radial-gradient(circle, rgba(43, 143, 216, 0.18), transparent 62%);
  pointer-events: none;
}

.hero-kicker,
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--teal-strong);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.hero h1,
.section-head h2,
.panel h3,
.acceptance h2 {
  font-family: Iowan Old Style, Palatino, "Palatino Linotype", "Book Antiqua", Georgia, serif;
}

.hero h1 {
  margin: 16px 0 18px;
  font-size: clamp(2.8rem, 5vw, 5rem);
  line-height: 0.93;
  letter-spacing: -0.035em;
  max-width: 12ch;
}

.hero-lead {
  margin: 0 0 24px;
  max-width: 61ch;
  color: var(--muted);
  font-size: 1.06rem;
  line-height: 1.75;
}

.hero-actions,
.hero-metrics,
.section-head,
.cascade-controls,
.topbar,
.data-columns,
.result-grid,
.acceptance-grid,
.tool-stack {
  display: flex;
}

.hero-actions {
  gap: 14px;
  flex-wrap: wrap;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 54px;
  padding: 0 22px;
  border-radius: 16px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
}

.button.primary {
  background: linear-gradient(135deg, var(--teal-strong), var(--blue));
  color: #fff;
  box-shadow: 0 14px 28px rgba(16, 91, 122, 0.22);
}

.button.secondary {
  border-color: rgba(14, 106, 136, 0.16);
  background: rgba(255,255,255,0.62);
  color: var(--teal-strong);
}

.hero-metrics {
  gap: 14px;
  margin-top: 26px;
  flex-wrap: wrap;
}

.metric-card,
.panel,
.strip article,
.stage-panel,
.acceptance-card {
  background: var(--panel);
  border: 1px solid rgba(255, 255, 255, 0.68);
  box-shadow: var(--shadow);
}

.metric-card {
  min-width: 178px;
  padding: 18px 18px 16px;
  border-radius: 20px;
}

.metric-value {
  display: block;
  font-size: 1.2rem;
  font-weight: 700;
}

.metric-label {
  display: block;
  margin-top: 6px;
  color: var(--muted);
  line-height: 1.45;
  font-size: 0.94rem;
}

.hero-visual {
  position: relative;
  min-height: 520px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-visual img {
  position: relative;
  z-index: 2;
  width: min(100%, 720px);
  filter: drop-shadow(0 20px 50px rgba(39, 89, 117, 0.18));
}

.hero-orbit {
  position: absolute;
  border-radius: 999px;
  border: 1px solid rgba(43, 143, 216, 0.18);
}

.orbit-a {
  inset: 10% 2% 16% 8%;
  animation: spin 22s linear infinite;
}

.orbit-b {
  inset: 18% 12% 22% 18%;
  animation: spinReverse 18s linear infinite;
}

.floating-badge {
  position: absolute;
  z-index: 3;
  padding: 16px 18px;
  border-radius: 18px;
  background: rgba(255,255,255,0.84);
  border: 1px solid rgba(255,255,255,0.72);
  box-shadow: 0 18px 38px rgba(33, 68, 94, 0.12);
  max-width: 210px;
  animation: floaty 5.4s ease-in-out infinite;
}

.floating-badge span {
  display: block;
  color: var(--muted);
  font-size: 0.82rem;
}

.floating-badge strong {
  display: block;
  margin-top: 5px;
  font-size: 1rem;
  line-height: 1.35;
}

.badge-top {
  top: 8%;
  left: 8%;
}

.badge-right {
  right: 2%;
  bottom: 13%;
  animation-delay: -2.6s;
}

.strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin: 28px 0 42px;
}

.strip article {
  padding: 22px 22px 20px;
  border-radius: 24px;
}

.strip strong {
  display: block;
  margin-bottom: 8px;
  font-size: 1rem;
}

.strip p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.cascade {
  padding: 24px 0 8px;
}

.section-head {
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 18px;
}

.section-head.compact {
  margin-bottom: 24px;
}

.section-head h2,
.acceptance h2 {
  margin: 10px 0 0;
  font-size: clamp(2rem, 3vw, 3.05rem);
  line-height: 1.02;
  letter-spacing: -0.03em;
}

.cascade-controls {
  gap: 10px;
}

.nav-btn {
  width: 48px;
  height: 48px;
  border: none;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.88);
  color: var(--teal-strong);
  font-size: 1.25rem;
  cursor: pointer;
  box-shadow: 0 8px 20px rgba(23, 67, 97, 0.08);
}

.cascade-track {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(280px, 34%);
  gap: 18px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding: 6px 2px 18px;
  scrollbar-width: none;
}

.cascade-track::-webkit-scrollbar {
  display: none;
}

.stage-panel {
  scroll-snap-align: start;
  min-height: 362px;
  padding: 26px 24px 22px;
  border-radius: 28px;
  position: relative;
  overflow: hidden;
  transition: transform 220ms ease, border-color 220ms ease;
}

.stage-panel::before {
  content: "";
  position: absolute;
  inset: 0 auto auto 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--teal), var(--mint));
  opacity: 0.15;
}

.stage-panel.active {
  transform: translateY(-4px);
  border-color: rgba(42, 191, 152, 0.22);
}

.stage-panel.active::before {
  opacity: 1;
}

.stage-topline {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 14px;
}

.stage-topline span {
  color: var(--teal-strong);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.78rem;
}

.stage-topline strong {
  font-size: 1.08rem;
}

.stage-panel h3 {
  margin: 0 0 16px;
  font-size: 1.9rem;
  line-height: 1.02;
}

.stage-panel ul {
  margin: 0;
  padding-left: 19px;
  color: var(--muted);
  line-height: 1.72;
}

.stage-panel li + li {
  margin-top: 6px;
}

.stage-footer {
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.stage-footer span {
  display: block;
  margin-bottom: 6px;
  color: var(--teal-strong);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.stage-footer p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.cascade-dots {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 8px;
}

.cascade-dots button {
  width: 12px;
  height: 12px;
  border-radius: 999px;
  border: none;
  background: rgba(17, 35, 49, 0.16);
  cursor: pointer;
  transition: 180ms ease;
}

.cascade-dots button.active {
  width: 38px;
  background: linear-gradient(90deg, var(--teal-strong), var(--mint));
}

.section-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 22px;
  margin-top: 42px;
}

.panel {
  padding: 30px;
  border-radius: 30px;
  min-width: 0;
}

.panel-wide {
  grid-column: 1 / 2;
}

.panel h3 {
  margin: 10px 0 20px;
  font-size: 2rem;
  line-height: 1.02;
}

.flow-map {
  display: flex;
  align-items: stretch;
  gap: 14px;
  overflow-x: auto;
  padding-bottom: 6px;
  scrollbar-width: thin;
}

.flow-node {
  min-width: 176px;
  flex: 0 0 176px;
  padding: 18px 16px;
  border-radius: 20px;
  background: rgba(255,255,255,0.76);
  border: 1px solid rgba(14, 106, 136, 0.08);
}

.flow-node span {
  display: block;
  color: var(--muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.flow-node strong {
  display: block;
  margin-top: 7px;
  font-size: 1rem;
}

.flow-node em {
  display: block;
  margin-top: 6px;
  color: var(--muted);
  font-style: normal;
  font-size: 0.92rem;
  line-height: 1.45;
}

.node-source,
.node-result {
  background: linear-gradient(180deg, rgba(16, 106, 136, 0.08), rgba(255,255,255,0.86));
}

.flow-arrow {
  flex: 0 0 auto;
  align-self: center;
  color: var(--teal-strong);
  font-size: 2rem;
  text-align: center;
}

.funnel-card,
.guard-list,
.risk-list,
.phone-screen ul {
  display: flex;
  flex-direction: column;
}

.funnel-card {
  gap: 12px;
}

.funnel-line {
  padding: 16px 18px;
  border-radius: 18px;
  background: rgba(255,255,255,0.72);
  border: 1px solid var(--line);
}

.funnel-line span {
  display: block;
  font-weight: 700;
}

.funnel-line em {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-style: normal;
}

.funnel-line.active {
  border-color: rgba(14, 106, 136, 0.25);
}

.funnel-line.accent {
  background: linear-gradient(135deg, rgba(43, 143, 216, 0.12), rgba(42, 191, 152, 0.14));
}

.funnel-line.goal {
  background: linear-gradient(135deg, rgba(42, 191, 152, 0.12), rgba(255,255,255,0.8));
}

.data-columns {
  gap: 16px;
}

.data-box,
.result-card,
.acceptance-card {
  flex: 1;
  padding: 22px;
  border-radius: 22px;
  background: rgba(255,255,255,0.72);
  border: 1px solid var(--line);
}

.data-box h3 {
  margin: 0 0 14px;
  font-size: 1.35rem;
}

.data-box ul,
.phone-screen ul {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.7;
}

.guard-list {
  gap: 12px;
}

.guard-item {
  padding: 16px 18px;
  border-radius: 16px;
  border: 1px solid var(--line);
  font-weight: 600;
}

.guard-item.bad {
  background: rgba(216, 95, 95, 0.08);
  color: #8b3f3f;
}

.guard-item.good {
  background: rgba(42, 191, 152, 0.12);
  color: #0c6a57;
}

.result-grid,
.acceptance-grid {
  gap: 16px;
  flex-wrap: wrap;
}

.result-card strong,
.acceptance-card strong {
  display: block;
  margin-bottom: 8px;
  font-size: 1.02rem;
}

.result-card p,
.acceptance-card p,
.risk-item p {
  margin: 0;
  color: var(--muted);
  line-height: 1.67;
}

.mobile-frame {
  position: relative;
}

.phone-mock {
  width: min(100%, 280px);
  margin: 6px auto 0;
  padding: 12px;
  border-radius: 34px;
  background: #101c25;
  box-shadow: 0 22px 48px rgba(16, 36, 50, 0.22);
}

.phone-notch {
  width: 36%;
  height: 18px;
  border-radius: 0 0 14px 14px;
  background: #0b141a;
  margin: 0 auto 10px;
}

.phone-screen {
  min-height: 470px;
  padding: 18px;
  border-radius: 24px;
  background:
    radial-gradient(circle at top right, rgba(43, 143, 216, 0.16), transparent 34%),
    #faf8f4;
}

.mini-chip {
  display: inline-flex;
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--teal-strong);
  background: rgba(14, 106, 136, 0.08);
}

.phone-screen h4 {
  margin: 18px 0 10px;
  font-family: Iowan Old Style, Palatino, Georgia, serif;
  font-size: 1.9rem;
  line-height: 1.02;
}

.phone-screen p {
  margin: 0 0 16px;
  color: var(--muted);
  line-height: 1.65;
}

.mini-progress {
  height: 10px;
  border-radius: 999px;
  background: rgba(17, 35, 49, 0.08);
  overflow: hidden;
}

.mini-progress span {
  display: block;
  width: 62%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--teal), var(--mint));
}

.risk-list {
  gap: 14px;
}

.risk-item {
  padding: 18px 18px 16px;
  border-radius: 18px;
  background: rgba(255,255,255,0.72);
  border: 1px solid var(--line);
}

.risk-item strong {
  display: block;
  margin-bottom: 8px;
}

.tool-stack {
  gap: 10px;
  flex-wrap: wrap;
}

.tool-stack span {
  padding: 12px 14px;
  border-radius: 999px;
  background: rgba(255,255,255,0.72);
  border: 1px solid var(--line);
  color: var(--teal-strong);
  font-weight: 600;
}

.acceptance {
  margin-top: 42px;
  padding: 34px;
  border-radius: 34px;
  background:
    linear-gradient(135deg, rgba(8, 73, 99, 0.95), rgba(18, 106, 135, 0.92)),
    linear-gradient(180deg, rgba(255,255,255,0.1), rgba(255,255,255,0.02));
  color: #f6fcff;
  box-shadow: 0 24px 52px rgba(10, 71, 94, 0.22);
}

.acceptance .section-tag,
.acceptance h2,
.acceptance-card strong {
  color: #fff;
}

.acceptance .section-tag {
  opacity: 0.8;
}

.acceptance-grid {
  margin-top: 22px;
}

.acceptance-card {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.14);
}

.acceptance-card p {
  color: rgba(246, 252, 255, 0.78);
}

.reveal {
  opacity: 1;
  transform: none;
}

body.js-ready .reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 500ms ease, transform 700ms ease;
}

body.js-ready .reveal.in {
  opacity: 1;
  transform: translateY(0);
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes spinReverse {
  from { transform: rotate(360deg); }
  to { transform: rotate(0deg); }
}

@keyframes floaty {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

@media (max-width: 1120px) {
  .hero {
    grid-template-columns: 1fr;
  }

  .hero h1 {
    max-width: 10ch;
  }

  .hero-visual {
    min-height: 420px;
  }

  .section-grid {
    grid-template-columns: 1fr;
  }

  .flow-map {
    flex-direction: column;
    overflow: visible;
  }

  .flow-arrow {
    transform: rotate(90deg);
  }
}

@media (max-width: 860px) {
  .topbar {
    position: relative;
    padding-top: 14px;
    flex-direction: column;
    align-items: flex-start;
  }

  .topbar,
  .data-columns {
    flex-direction: column;
  }

  .chapter-nav {
    justify-content: flex-start;
  }

  .strip {
    grid-template-columns: 1fr;
  }

  .layout {
    width: min(calc(100% - 28px), var(--max));
  }

  .hero,
  .panel,
  .acceptance {
    padding: 24px;
    border-radius: 26px;
  }

  .hero-visual {
    min-height: 300px;
  }

  .floating-badge {
    display: none;
  }

  .cascade-track {
    grid-auto-columns: 85%;
  }
}

@media (max-width: 560px) {
  .hero h1 {
    font-size: 2.55rem;
  }

  .section-head h2,
  .acceptance h2 {
    font-size: 2rem;
  }

  .stage-panel h3,
  .panel h3,
  .phone-screen h4 {
    font-size: 1.6rem;
  }

  .metric-card {
    min-width: 100%;
  }

  .cascade-track {
    grid-auto-columns: 92%;
  }
}