:root {
  --ink: #0d0e13;
  --panel: #15161b;
  --panel-2: #202126;
  --cream: #f3ede3;
  --muted: #aaa59d;
  --orange: #c8603d;
  --line: rgba(243, 237, 227, 0.2);
  --max: 1480px;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--ink);
  color: var(--cream);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--ink);
  color: var(--cream);
  font-family: Inter, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

body.menu-open {
  overflow: hidden;
}

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

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

button {
  font: inherit;
}

.skip-link {
  position: fixed;
  left: 1rem;
  top: -5rem;
  z-index: 100;
  padding: 0.8rem 1rem;
  background: var(--cream);
  color: var(--ink);
}

.skip-link:focus {
  top: 1rem;
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 88px;
  padding: 1.2rem clamp(1.25rem, 4vw, 4.5rem);
  border-bottom: 1px solid transparent;
  background: linear-gradient(180deg, rgba(13, 14, 19, 0.96), rgba(13, 14, 19, 0.7) 70%, transparent);
  backdrop-filter: blur(10px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  min-height: 44px;
  font-size: 1.1rem;
  font-weight: 650;
  letter-spacing: 0.08em;
}

.scope-mark {
  position: relative;
  display: inline-block;
  width: 34px;
  height: 34px;
}

.scope-mark::before,
.scope-mark::after {
  content: "";
  position: absolute;
  top: 7px;
  width: 19px;
  height: 19px;
  border: 4px solid var(--orange);
  border-radius: 50%;
}

.scope-mark::before {
  left: 0;
}

.scope-mark::after {
  right: 0;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2.5vw, 2.6rem);
}

.site-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--cream);
  font-size: 0.86rem;
  transition: color 180ms ease;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--orange);
}

.site-nav .nav-cta,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0.9rem 1.35rem;
  border: 1px solid var(--orange);
  background: var(--orange);
  color: var(--cream);
  font-size: 0.86rem;
  font-weight: 600;
  transition: background 180ms ease, color 180ms ease, transform 180ms ease;
}

.button:hover,
.site-nav .nav-cta:hover {
  background: var(--cream);
  border-color: var(--cream);
  color: var(--ink);
  transform: translateY(-2px);
}

.button.is-outline {
  background: transparent;
  border-color: var(--line);
}

.button.is-outline:hover {
  border-color: var(--cream);
}

.menu-toggle {
  display: none;
  width: 48px;
  height: 48px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--cream);
}

.menu-toggle span,
.menu-toggle::before,
.menu-toggle::after {
  content: "";
  display: block;
  width: 20px;
  height: 1px;
  margin: 5px auto;
  background: currentColor;
  transition: transform 180ms ease, opacity 180ms ease;
}

.menu-toggle[aria-expanded="true"] span {
  opacity: 0;
}

.menu-toggle[aria-expanded="true"]::before {
  transform: translateY(6px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"]::after {
  transform: translateY(-6px) rotate(-45deg);
}

.system-hero {
  min-height: 100svh;
  padding: clamp(9rem, 14vw, 13rem) clamp(1.25rem, 4vw, 4.5rem) 3rem;
  overflow: hidden;
}

.hero-copy,
.section-inner,
.catalog-inner {
  width: min(100%, var(--max));
  margin-inline: auto;
}

.hero-copy {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.back-link {
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--muted);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.back-link::before {
  content: "←";
  margin-right: 0.5rem;
  color: var(--orange);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.45rem;
  margin: clamp(2.5rem, 6vw, 5rem) 0 1.8rem;
  padding: 0;
  list-style: none;
}

.tag-list li {
  padding: 0.45rem 0.75rem;
  border: 1px solid var(--cream);
  border-radius: 999px;
  font-size: clamp(0.58rem, 0.7vw, 0.72rem);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.system-hero h1,
.catalog-hero h1 {
  max-width: 1500px;
  margin: 0;
  color: var(--orange);
  font-size: clamp(4.5rem, 11.5vw, 12rem);
  font-weight: 450;
  letter-spacing: -0.075em;
  line-height: 0.82;
}

.hero-description {
  max-width: 730px;
  margin: 2rem auto 0;
  color: var(--muted);
  font-size: clamp(1rem, 1.4vw, 1.25rem);
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
  margin-top: 2rem;
}

.visual-rail {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  width: min(100%, 1680px);
  margin: clamp(3.5rem, 7vw, 7rem) auto 0;
  background: var(--line);
  border: 1px solid var(--line);
}

.visual-frame {
  position: relative;
  min-height: clamp(250px, 29vw, 520px);
  overflow: hidden;
  background: #ece6dc;
}

.visual-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.03);
}

.visual-frame:nth-child(2) img {
  object-position: 35% center;
  transform: scale(1.22);
}

.visual-frame:nth-child(3) img {
  object-position: 65% center;
  transform: scale(1.32);
}

.visual-frame:nth-child(4) img {
  object-position: right center;
  transform: scale(1.15);
}

.visual-frame span {
  position: absolute;
  left: 1rem;
  bottom: 1rem;
  padding: 0.35rem 0.55rem;
  background: rgba(13, 14, 19, 0.84);
  color: var(--cream);
  font-size: 0.64rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.section {
  padding: clamp(5rem, 10vw, 10rem) clamp(1.25rem, 4vw, 4.5rem);
  border-top: 1px solid var(--line);
}

.section.is-cream {
  background: var(--cream);
  color: var(--ink);
}

.section-kicker {
  margin: 0 0 1.5rem;
  color: var(--orange);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.overview-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.7fr) minmax(0, 1.5fr);
  gap: clamp(2rem, 8vw, 10rem);
}

.overview-grid h2,
.section-heading {
  margin: 0;
  font-size: clamp(2.6rem, 6vw, 6.8rem);
  font-weight: 450;
  letter-spacing: -0.06em;
  line-height: 0.94;
}

.overview-copy {
  max-width: 820px;
  font-size: clamp(1.25rem, 2.2vw, 2.25rem);
  line-height: 1.3;
}

.overview-copy p {
  margin: 0;
}

.outcome-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(4rem, 8vw, 8rem);
  background: rgba(13, 14, 19, 0.18);
}

.outcome {
  min-height: 180px;
  padding: 1.5rem;
  background: var(--cream);
}

.outcome span {
  color: var(--orange);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.outcome strong {
  display: block;
  max-width: 24rem;
  margin-top: 2rem;
  font-size: clamp(1.25rem, 2vw, 2rem);
  font-weight: 500;
  line-height: 1.15;
}

.feature-grid,
.system-grid,
.note-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-top: clamp(3rem, 6vw, 6rem);
}

.feature-card,
.system-card,
.note-card {
  position: relative;
  min-height: 350px;
  padding: 1.5rem;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--panel);
}

.feature-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.feature-card .number {
  color: var(--orange);
  font-size: 0.75rem;
}

.feature-card h3,
.system-card h2,
.note-card h2 {
  margin: auto 0 1rem;
  font-size: clamp(1.8rem, 3vw, 3.2rem);
  font-weight: 450;
  letter-spacing: -0.045em;
  line-height: 0.98;
}

.feature-card p,
.system-card p,
.note-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}

.feature-card::after {
  content: "";
  width: 50px;
  height: 1px;
  margin-top: 2.5rem;
  background: var(--orange);
}

.process-list {
  margin: clamp(3rem, 6vw, 6rem) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid rgba(13, 14, 19, 0.2);
}

.process-list li {
  display: grid;
  grid-template-columns: 80px minmax(180px, 0.7fr) minmax(0, 1.3fr);
  gap: 1rem;
  padding: 1.8rem 0;
  border-bottom: 1px solid rgba(13, 14, 19, 0.2);
}

.process-list .step-number {
  color: var(--orange);
  font-size: 0.75rem;
}

.process-list h3 {
  margin: 0;
  font-size: clamp(1.5rem, 3vw, 2.8rem);
  font-weight: 450;
}

.process-list p {
  max-width: 650px;
  margin: 0;
  line-height: 1.6;
}

.system-card,
.note-card {
  display: flex;
  flex-direction: column;
  min-height: 480px;
  padding: 0;
  transition: transform 180ms ease, border-color 180ms ease;
}

.system-card:hover,
.note-card:hover {
  transform: translateY(-5px);
  border-color: var(--orange);
}

.system-card img,
.note-card img {
  width: 100%;
  aspect-ratio: 1 / 0.82;
  object-fit: cover;
  background: #ece6dc;
}

.card-copy {
  display: flex;
  flex: 1;
  flex-direction: column;
  padding: 1.4rem;
}

.card-copy .tag {
  color: var(--orange);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.card-copy h2 {
  margin-top: 2rem;
}

.card-link {
  margin-top: 2rem;
  color: var(--cream);
  font-size: 0.75rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.card-link::after {
  content: " ↗";
  color: var(--orange);
}

.catalog-hero {
  padding: clamp(10rem, 16vw, 15rem) clamp(1.25rem, 4vw, 4.5rem) clamp(5rem, 9vw, 9rem);
  border-bottom: 1px solid var(--line);
}

.catalog-hero p {
  max-width: 720px;
  margin: 2rem 0 0;
  color: var(--muted);
  font-size: clamp(1.05rem, 1.8vw, 1.35rem);
  line-height: 1.55;
}

.contact-panel {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(260px, 0.7fr);
  gap: clamp(2rem, 8vw, 8rem);
  align-items: end;
}

.contact-panel h2 {
  max-width: 1000px;
  margin: 0;
  font-size: clamp(3.5rem, 9vw, 10rem);
  font-weight: 450;
  letter-spacing: -0.07em;
  line-height: 0.88;
}

.contact-meta {
  display: grid;
  gap: 1rem;
}

.contact-meta p {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}

.site-footer {
  padding: 2rem clamp(1.25rem, 4vw, 4.5rem);
  border-top: 1px solid var(--line);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(100%, var(--max));
  margin-inline: auto;
  color: var(--muted);
  font-size: 0.76rem;
}

.footer-links {
  display: flex;
  gap: 1.4rem;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 600ms ease, transform 600ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 4px;
}

@media (max-width: 900px) {
  .menu-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    right: 0;
    left: 0;
    z-index: 45;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    height: calc(100svh - 88px);
    padding: 2rem 1.25rem;
    overflow-y: auto;
    background: var(--ink);
    transform: translateX(100%);
    visibility: hidden;
    transition: transform 220ms ease, visibility 220ms ease;
  }

  .site-nav.is-open {
    transform: none;
    visibility: visible;
  }

  .site-nav a {
    min-height: 64px;
    border-bottom: 1px solid var(--line);
    font-size: 1.2rem;
  }

  .site-nav .nav-cta {
    margin-top: 1rem;
    justify-content: center;
    border-bottom: 0;
  }

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

  .overview-grid,
  .contact-panel {
    grid-template-columns: 1fr;
  }

  .feature-grid,
  .system-grid,
  .note-grid {
    grid-template-columns: 1fr 1fr;
  }

  .process-list li {
    grid-template-columns: 50px 1fr;
  }

  .process-list p {
    grid-column: 2;
  }
}

@media (max-width: 620px) {
  .site-header {
    min-height: 76px;
    padding-block: 0.8rem;
  }

  .site-nav {
    height: calc(100svh - 76px);
  }

  .system-hero h1,
  .catalog-hero h1 {
    font-size: clamp(4.2rem, 21vw, 7rem);
  }

  .visual-rail,
  .feature-grid,
  .system-grid,
  .note-grid,
  .outcome-strip {
    grid-template-columns: 1fr;
  }

  .visual-frame {
    min-height: 320px;
  }

  .visual-frame:nth-child(n + 3) {
    display: none;
  }

  .feature-card,
  .system-card,
  .note-card {
    min-height: 360px;
  }

  .process-list li {
    grid-template-columns: 36px 1fr;
  }

  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 1rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  [data-reveal] {
    opacity: 1;
    transform: none;
  }
}