:root {
  --bg: #f6f3ec;
  --bg-deep: #ebe6dd;
  --surface: rgba(255, 252, 247, 0.82);
  --surface-strong: rgba(255, 250, 244, 0.94);
  --surface-soft: rgba(21, 41, 58, 0.04);
  --line: rgba(31, 58, 82, 0.12);
  --line-strong: rgba(31, 58, 82, 0.22);
  --text: #162534;
  --muted: #617487;
  --accent: #0f9d84;
  --accent-2: #2d6cdf;
  --accent-3: #86e3d2;
  --danger-soft: rgba(214, 98, 76, 0.1);
  --success-soft: rgba(15, 157, 132, 0.1);
  --shadow-xl: 0 28px 70px rgba(74, 63, 48, 0.12);
  --shadow-lg: 0 18px 40px rgba(74, 63, 48, 0.1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  overflow-x: hidden;
  color: var(--text);
  font-family: "IBM Plex Sans", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(45, 108, 223, 0.16), transparent 30%),
    radial-gradient(circle at 85% 18%, rgba(15, 157, 132, 0.14), transparent 24%),
    linear-gradient(180deg, #f9f6f0 0%, #f6f3ec 44%, #ebe6dd 100%);
}

.bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(28, 49, 68, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(28, 49, 68, 0.05) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.8), transparent 85%);
  pointer-events: none;
}

.bg-orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
}

.orb-a {
  width: 320px;
  height: 320px;
  top: 90px;
  right: -60px;
  background: rgba(45, 108, 223, 0.18);
}

.orb-b {
  width: 380px;
  height: 380px;
  left: -100px;
  bottom: 60px;
  background: rgba(15, 157, 132, 0.14);
}

.orb-c {
  width: 220px;
  height: 220px;
  right: 18%;
  top: 44%;
  background: rgba(134, 227, 210, 0.16);
}

.site-header,
main {
  position: relative;
  z-index: 1;
  width: min(1160px, calc(100vw - 32px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 10px;
  z-index: 5;
  padding: 20px 0 0;
}

.header-shell {
  width: min(980px, 100%);
  margin: 0 auto;
  padding: 12px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  background: rgba(255, 250, 244, 0.74);
  border: 1px solid rgba(31, 58, 82, 0.1);
  border-radius: 28px;
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow-lg);
}

.brand {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 148px;
  min-width: 148px;
  height: 56px;
  padding: 0;
  color: var(--text);
  text-decoration: none;
  font-family: "Space Grotesk", sans-serif;
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand-logo {
  width: 125px;
  height: 56px;
  object-fit: cover;
  object-position: center;
  display: block;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px;
  background: rgba(21, 41, 58, 0.03);
  border: 1px solid rgba(31, 58, 82, 0.08);
  border-radius: 999px;
}

.nav-links a {
  padding: 10px 14px;
  border-radius: 999px;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
  transition: color 180ms ease, background 180ms ease, transform 180ms ease;
}

.nav-links a:hover {
  color: var(--text);
  background: rgba(21, 41, 58, 0.06);
  transform: translateY(-1px);
}

main {
  padding-bottom: 72px;
}

.hero,
.chapter-intro,
.story-grid,
.narrative-section,
.feature-chapters,
.audience-section,
.before-after,
.closing-section {
  scroll-margin-top: 100px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.82fr);
  gap: clamp(22px, 3vw, 34px);
  align-items: center;
  min-height: calc(100svh - 132px);
  padding: 10px 0 14px;
  animation: rise-in 700ms ease both;
}

.section-label,
.card-label,
.panel-label,
.signal-kicker {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.75rem;
}

.section-label,
.signal-kicker {
  color: var(--accent);
}

h1,
h2,
h3,
strong {
  font-family: "Space Grotesk", sans-serif;
}

h1 {
  margin: 0 0 16px;
  max-width: 700px;
  font-size: clamp(2.35rem, 5.6vw, 4.5rem);
  line-height: 0.94;
  letter-spacing: -0.05em;
}

h1 span {
  display: block;
}

.title-line {
  max-width: 12ch;
}

.title-line + .title-line {
  margin-top: 0.22em;
}

.title-line-accent {
  max-width: 14ch;
  color: #2f465d;
}

.lead {
  max-width: 620px;
  margin: 0;
  color: var(--muted);
  font-size: clamp(1rem, 1.85vw, 1.12rem);
  line-height: 1.65;
}

.hero-copy {
  max-width: 700px;
}

.hero-actions,
.closing-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 24px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  border-radius: 999px;
  border: 1px solid transparent;
  text-decoration: none;
  font-weight: 600;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease, border-color 180ms ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  color: #f8fffd;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 12px 28px rgba(45, 108, 223, 0.18);
}

.btn-secondary,
.btn-ghost {
  color: var(--text);
  background: rgba(255, 252, 247, 0.72);
  border-color: rgba(31, 58, 82, 0.12);
}

.btn-secondary:hover,
.btn-ghost:hover {
  background: rgba(31, 58, 82, 0.06);
}

.hero-panel,
.story-card,
.feature-panel,
.architecture-panel,
.compare-card,
.closing-section,
.chapter-intro,
.narrative-section,
.audience-section {
  background: var(--surface);
  border: 1px solid var(--line);
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-xl);
}

.hero-panel {
  justify-self: end;
  width: min(100%, 390px);
  padding: 20px;
  border-radius: 26px;
}

.panel-top {
  padding-bottom: 18px;
  border-bottom: 1px solid rgba(31, 58, 82, 0.08);
}

.panel-top strong {
  display: block;
  margin-top: 8px;
  font-size: 1.18rem;
  line-height: 1.18;
}

.signal-card {
  margin-top: 16px;
  padding: 16px;
  border-radius: 20px;
  background:
    linear-gradient(180deg, rgba(45, 108, 223, 0.08), rgba(45, 108, 223, 0.03)),
    rgba(255, 255, 255, 0.58);
  border: 1px solid rgba(45, 108, 223, 0.12);
}

.signal-card h2 {
  margin: 8px 0 8px;
  font-size: 1.35rem;
  line-height: 1.12;
}

.signal-card p,
.signal-list p,
.chapter-intro p,
.story-card p,
.narrative-copy p,
.rail-step p,
.feature-list p,
.architecture-panel p,
.audience-copy p,
.audience-cards p,
.compare-card li,
.closing-section p {
  color: var(--muted);
  line-height: 1.72;
}

.signal-list {
  display: grid;
  gap: 10px;
  margin-top: 14px;
}

.signal-list article {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 12px 0;
  border-top: 1px solid rgba(31, 58, 82, 0.08);
}

.signal-list span {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 14px;
  background: rgba(21, 41, 58, 0.04);
  border: 1px solid rgba(31, 58, 82, 0.08);
  color: var(--accent);
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
}

.signal-list h3 {
  margin: 0 0 4px;
  font-size: 1rem;
}

.signal-list p {
  margin: 0;
}

.chapter-intro,
.closing-section {
  padding: 32px;
  border-radius: 34px;
}

.chapter-intro,
.story-card,
.narrative-section,
.feature-panel,
.architecture-panel,
.audience-section,
.compare-card,
.closing-section {
  animation: rise-in 700ms ease both;
}

.chapter-intro h2,
.closing-section h2,
.feature-panel h2,
.architecture-panel h2,
.before-after h2,
.audience-copy h2,
.narrative-copy h2 {
  margin: 12px 0 14px;
  font-size: clamp(1.8rem, 4.2vw, 3rem);
  line-height: 1.06;
  letter-spacing: -0.04em;
}

.chapter-intro p:last-child,
.closing-section p {
  max-width: 860px;
}

.story-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 22px;
}

.story-card {
  padding: 24px;
  border-radius: 28px;
  min-height: 270px;
}

.card-label {
  color: var(--accent-2);
}

.story-card h3 {
  margin: 10px 0 12px;
  font-size: 1.45rem;
  line-height: 1.15;
}

.narrative-section,
.audience-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 420px);
  gap: 26px;
  padding: 30px;
  border-radius: 34px;
  margin-top: 22px;
}

.narrative-copy p,
.audience-copy p {
  max-width: 720px;
}

.narrative-rail {
  position: relative;
  display: grid;
  gap: 14px;
}

.rail-step {
  padding: 18px;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.56);
  border: 1px solid rgba(31, 58, 82, 0.08);
}

.rail-step strong {
  font-size: 1rem;
}

.rail-step p {
  margin: 8px 0 0;
}

.feature-chapters {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
  gap: 18px;
  margin-top: 22px;
}

.feature-panel,
.architecture-panel {
  padding: 28px;
  border-radius: 32px;
}

.feature-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 18px;
}

.feature-list div {
  padding: 18px;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.56);
  border: 1px solid rgba(31, 58, 82, 0.08);
}

.feature-list h3 {
  margin: 0 0 8px;
  font-size: 1.08rem;
}

.feature-list p {
  margin: 0;
}

.architecture-panel ul {
  display: grid;
  gap: 12px;
  padding: 0;
  margin: 18px 0 14px;
  list-style: none;
}

.architecture-panel li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 16px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.56);
  border: 1px solid rgba(31, 58, 82, 0.08);
}

.architecture-panel strong {
  font-size: 1rem;
}

.architecture-panel span {
  color: var(--muted);
  text-align: right;
  font-size: 0.94rem;
}

.panel-note {
  margin: 0;
}

.audience-cards {
  display: grid;
  gap: 14px;
}

.audience-cards article {
  padding: 18px;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.56);
  border: 1px solid rgba(31, 58, 82, 0.08);
}

.audience-cards h3 {
  margin: 0 0 8px;
  font-size: 1.08rem;
}

.audience-cards p {
  margin: 0;
}

.before-after {
  margin-top: 22px;
}

.before-after h2 {
  margin: 12px 0 16px;
}

.compare-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.compare-card {
  padding: 26px;
  border-radius: 30px;
  border-width: 1px;
  border-style: solid;
  box-shadow: 0 18px 36px rgba(74, 63, 48, 0.08);
}

.compare-before {
  background: linear-gradient(180deg, rgba(214, 98, 76, 0.08), rgba(255, 249, 245, 0.96));
  border-color: rgba(214, 98, 76, 0.14);
}

.compare-after {
  background: linear-gradient(180deg, rgba(15, 157, 132, 0.08), rgba(248, 255, 252, 0.96));
  border-color: rgba(15, 157, 132, 0.14);
}

.compare-card h3 {
  margin: 0 0 12px;
  font-size: 1.38rem;
}

.compare-card ul {
  margin: 0;
  padding-left: 20px;
}

.compare-card li + li {
  margin-top: 10px;
}

.closing-section {
  margin-top: 26px;
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(18px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 1080px) {
  .hero,
  .feature-chapters,
  .narrative-section,
  .audience-section {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding: 18px 0 8px;
  }

  .hero-panel,
  .narrative-rail,
  .audience-cards {
    max-width: 100%;
  }
}

@media (max-width: 920px) {
  .header-shell {
    padding: 14px;
    border-radius: 24px;
  }

  .nav-links {
    display: none;
  }

  .story-grid,
  .feature-list,
  .compare-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .site-header {
    padding-top: 14px;
  }

  .site-header,
  main {
    width: min(1160px, calc(100vw - 20px));
  }

  .header-shell {
    gap: 12px;
  }

  .brand {
    width: 124px;
    min-width: 124px;
    height: 48px;
  }

  .btn-ghost {
    display: none;
  }

  .hero {
    min-height: auto;
    padding: 12px 0 18px;
    gap: 16px;
  }

  .title-line,
  .title-line-accent {
    max-width: none;
  }

  .chapter-intro,
  .narrative-section,
  .feature-panel,
  .architecture-panel,
  .audience-section,
  .compare-card,
  .closing-section,
  .hero-panel {
    padding: 22px;
    border-radius: 24px;
  }

  .story-card {
    min-height: auto;
    padding: 22px;
    border-radius: 24px;
  }

  .architecture-panel li {
    flex-direction: column;
    align-items: flex-start;
  }

  .architecture-panel span {
    text-align: left;
  }
}