:root {
  --bg-canvas: #f7fbff;
  --bg-surface: #ffffff;
  --bg-soft: #edf5fa;
  --text-strong: #10213b;
  --text-body: #40566d;
  --text-muted: #40566d;
  --border: #cadae6;
  --border-strong: #a9c0d1;
  --accent-router: #168bff;
  --accent-code: #f02f93;
  --accent-code-cyan: #19b8d4;
  --accent-ide: #5c6de0;
  --control-primary: #064a83;
  --text-code: #8c1459;
  --text-ide: #303b7a;
  --success: #17633d;
  --warning: #774909;
  --page-accent: var(--accent-router);
  --page-accent-ink: var(--control-primary);
  --font-display: "Trebuchet MS", "Avenir Next", sans-serif;
  --font-body: Aptos, "Segoe UI", sans-serif;
  --font-mono: "Cascadia Code", "SFMono-Regular", Consolas, monospace;
  --max-width: 1180px;
  --shadow-scene: 0 28px 60px rgba(31, 75, 109, 0.18);
  --shadow-card: 0 14px 36px rgba(35, 72, 104, 0.08);
}

.product-code {
  --page-accent: var(--accent-code);
  --page-accent-ink: var(--text-code);
}

.product-ide {
  --page-accent: var(--accent-ide);
  --page-accent-ink: var(--text-ide);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  background: var(--bg-canvas);
  color: var(--text-body);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  min-height: 100vh;
  margin: 0;
  background: var(--bg-canvas);
  color: var(--text-body);
  overflow-x: hidden;
}

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

a {
  color: var(--page-accent-ink);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--text-strong);
}

code,
pre,
.eyebrow,
.product-label,
.scene-panel,
.fact-key,
.status-line {
  font-family: var(--font-mono);
}

code {
  color: var(--text-strong);
  font-size: 0.92em;
}

:focus-visible {
  outline: 3px solid var(--control-primary);
  outline-offset: 3px;
}

::selection {
  background: rgba(22, 139, 255, 0.22);
  color: var(--text-strong);
}

.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;
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 100;
  min-height: 44px;
  padding: 0.6rem 1rem;
  background: var(--text-strong);
  color: #ffffff;
  border-radius: 8px;
  transform: translateY(-160%);
}

.skip-link:focus {
  color: #ffffff;
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid rgba(169, 192, 209, 0.72);
  background: rgba(247, 251, 255, 0.94);
  backdrop-filter: blur(14px);
}

.nav-container {
  width: min(calc(100% - 2rem), var(--max-width));
  min-height: 72px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.brand-link {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--text-strong);
  font-family: var(--font-display);
  font-size: 1.08rem;
  font-weight: 800;
  letter-spacing: -0.04em;
  text-decoration: none;
}

.brand-link strong {
  color: var(--page-accent-ink);
}

.brand-badge-img {
  width: 34px;
  height: 34px;
  padding: 3px;
  object-fit: contain;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: var(--bg-surface);
}

.brand-tagline {
  display: block;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-link {
  min-height: 44px;
  padding: 0.65rem 0.85rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  color: var(--text-body);
  font-size: 0.88rem;
  font-weight: 650;
  text-decoration: none;
}

.nav-link:hover,
.nav-link.active {
  background: var(--bg-surface);
  color: var(--page-accent-ink);
  box-shadow: inset 0 0 0 1px var(--border);
}

.page-main {
  width: min(calc(100% - 2rem), var(--max-width));
  margin: 0 auto;
}

.page-hero {
  min-height: 620px;
  padding: clamp(4.5rem, 8vw, 7rem) 0 clamp(4rem, 7vw, 6rem);
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(420px, 1.1fr);
  align-items: center;
  gap: clamp(2rem, 5vw, 5rem);
}

.hero-copy {
  position: relative;
  z-index: 5;
}

.eyebrow,
.product-label {
  color: var(--page-accent-ink);
  font-size: 0.76rem;
  font-weight: 750;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.page-hero h1 {
  max-width: 11ch;
  margin: 0.9rem 0 1.25rem;
  color: var(--text-strong);
  font-family: var(--font-display);
  font-size: clamp(3.2rem, 7vw, 6.3rem);
  font-weight: 800;
  line-height: 0.94;
  letter-spacing: -0.075em;
}

.page-hero h1 em {
  color: var(--page-accent-ink);
  font-style: normal;
}

.hero-lead {
  max-width: 58ch;
  margin: 0;
  color: var(--text-strong);
  font-size: clamp(1.05rem, 1.6vw, 1.3rem);
  line-height: 1.55;
}

.hero-note {
  max-width: 60ch;
  margin: 1rem 0 0;
  color: var(--text-muted);
  font-size: 0.94rem;
}

.hero-actions,
.button-row {
  margin-top: 1.7rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.btn {
  min-height: 44px;
  padding: 0.7rem 1rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  background: var(--bg-surface);
  color: var(--text-strong);
  font-size: 0.9rem;
  font-weight: 750;
  text-decoration: none;
  box-shadow: 0 6px 15px rgba(28, 65, 96, 0.06);
  transition: transform 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}

.btn:hover {
  color: var(--text-strong);
  border-color: var(--page-accent-ink);
  box-shadow: 0 10px 22px rgba(28, 65, 96, 0.11);
  transform: translateY(-2px);
}

.btn-primary {
  border-color: var(--control-primary);
  background: var(--control-primary);
  color: #ffffff;
}

.btn-primary:hover {
  background: var(--text-strong);
  color: #ffffff;
}

.hero-scene {
  position: relative;
  min-width: 0;
  min-height: 440px;
  perspective: 950px;
  isolation: isolate;
}

.hero-scene::before {
  content: "";
  position: absolute;
  inset: 7% 5% 5%;
  z-index: -2;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(22, 139, 255, 0.14), rgba(22, 139, 255, 0.035) 52%, transparent 70%);
}

.hero-scene::after {
  content: "";
  position: absolute;
  inset: 8% 12% 12%;
  z-index: -1;
  border: 1px solid rgba(22, 139, 255, 0.2);
  border-radius: 48% 52% 46% 54%;
  transform: rotate(-11deg);
}

.scene-dock {
  position: absolute;
  left: 50%;
  top: 68%;
  width: min(52%, 260px);
  aspect-ratio: 2.6 / 1;
  border: 1px solid var(--border-strong);
  border-radius: 50%;
  background: linear-gradient(160deg, #ffffff, #d9e8f2);
  box-shadow: var(--shadow-scene), inset 0 8px 18px #ffffff;
  transform: translate(-50%, -50%) rotateX(63deg);
  transform-style: preserve-3d;
}

.scene-dock::before {
  content: "";
  position: absolute;
  inset: 16%;
  border: 2px solid var(--page-accent);
  border-radius: 50%;
  box-shadow: 0 0 22px rgba(22, 139, 255, 0.32);
}

.scene-mascot,
.scene-mark {
  position: absolute;
  z-index: 5;
  left: 50%;
  top: 48%;
  width: min(39%, 205px);
  max-height: 225px;
  object-fit: contain;
  filter: drop-shadow(0 24px 18px rgba(39, 69, 94, 0.2));
  transform: translate(-50%, -50%);
  animation: scene-breathe 6s ease-in-out infinite;
}

.scene-mark {
  width: min(34%, 170px);
}

.scene-panel {
  position: absolute;
  z-index: 4;
  width: min(39%, 190px);
  min-height: 108px;
  padding: 0.9rem;
  border: 1px solid rgba(75, 110, 139, 0.28);
  border-top: 3px solid var(--panel-accent, var(--page-accent));
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.96);
  color: var(--text-muted);
  font-size: 0.72rem;
  line-height: 1.45;
  box-shadow: var(--shadow-card);
  transform-style: preserve-3d;
}

.scene-panel::before {
  content: "●  ●  ●";
  display: block;
  margin-bottom: 0.55rem;
  color: var(--border-strong);
  letter-spacing: 0.18em;
}

.scene-panel strong {
  display: block;
  color: var(--text-strong);
  font-family: var(--font-body);
  font-size: 0.92rem;
}

.scene-panel small {
  display: block;
  margin-top: 0.2rem;
  color: var(--text-muted);
}

.scene-panel::after {
  content: "";
  display: block;
  width: var(--meter, 70%);
  height: 5px;
  margin-top: 0.85rem;
  border-radius: 4px;
  background: var(--panel-accent, var(--page-accent));
}

.scene-panel-left {
  left: 0;
  top: 16%;
  transform: rotateY(18deg) rotateZ(-5deg);
}

.scene-panel-right {
  right: 0;
  top: 20%;
  transform: rotateY(-18deg) rotateZ(5deg);
}

.scene-panel-bottom {
  right: 6%;
  bottom: 1%;
  transform: rotateY(-12deg) rotateZ(2deg);
}

.scene-panel-router {
  --panel-accent: var(--accent-router);
  --meter: 82%;
}

.scene-panel-code {
  --panel-accent: var(--accent-code);
  --meter: 64%;
}

.scene-panel-ide {
  --panel-accent: var(--accent-ide);
  --meter: 74%;
}

@keyframes scene-breathe {
  0%, 100% { transform: translate(-50%, -50%); }
  50% { transform: translate(-50%, calc(-50% - 8px)); }
}

.section-shell {
  padding: clamp(4rem, 8vw, 7.5rem) 0;
  border-top: 1px solid var(--border);
}

.section-shell.compact {
  padding-top: 3.5rem;
  padding-bottom: 3.5rem;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 2.2rem;
}

.section-heading h2,
.section-shell > h2 {
  margin: 0.4rem 0 0.75rem;
  color: var(--text-strong);
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.6rem);
  line-height: 1.03;
  letter-spacing: -0.055em;
}

.section-heading p,
.section-shell > p {
  max-width: 68ch;
  margin: 0;
}

.product-overview {
  display: grid;
  grid-template-columns: minmax(0, 1.18fr) minmax(0, 0.82fr);
  grid-template-areas:
    "router code"
    "router ide";
  gap: 1rem;
}

.product-card,
.feature-card,
.fact-table,
.code-panel,
.figure-container,
.notice-panel,
.architecture-band {
  border: 1px solid var(--border);
  background: var(--bg-surface);
}

.product-card {
  position: relative;
  min-width: 0;
  padding: clamp(1.4rem, 3vw, 2.3rem);
  border-radius: 14px;
  overflow: hidden;
}

.product-card::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 5rem;
  height: 5rem;
  border-left: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--card-accent) 12%, white);
  transform: translate(45%, -45%) rotate(45deg);
}

.product-card-router {
  --card-accent: var(--accent-router);
  grid-area: router;
  min-height: 430px;
}

.product-card-code {
  --card-accent: var(--accent-code);
  grid-area: code;
}

.product-card-ide {
  --card-accent: var(--accent-ide);
  grid-area: ide;
}

.product-card h3,
.feature-card h3 {
  margin: 0.55rem 0 0.55rem;
  color: var(--text-strong);
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2.5vw, 2rem);
  letter-spacing: -0.04em;
}

.product-card p,
.feature-card p {
  margin-top: 0;
}

.feature-list {
  margin: 1.2rem 0 0;
  padding: 0;
  list-style: none;
}

.feature-list li {
  position: relative;
  padding: 0.65rem 0 0.65rem 1.25rem;
  border-top: 1px solid var(--border);
}

.feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.25rem;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background: var(--card-accent, var(--page-accent));
}

.architecture-band {
  padding: clamp(1.5rem, 4vw, 3rem);
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 2rem;
  border-radius: 14px;
}

.architecture-copy h3 {
  margin: 0.5rem 0 0.8rem;
  color: var(--text-strong);
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.5rem);
  letter-spacing: -0.045em;
}

.system-route {
  display: grid;
  grid-template-columns: 1fr auto 1.15fr auto 1fr;
  align-items: center;
  gap: 0.7rem;
}

.route-node {
  min-width: 0;
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg-canvas);
}

.route-node strong {
  display: block;
  color: var(--text-strong);
}

.route-node small {
  color: var(--text-muted);
}

.route-node.central {
  border-color: var(--page-accent);
  background: color-mix(in srgb, var(--page-accent) 6%, white);
}

.route-line {
  color: var(--page-accent-ink);
  font-family: var(--font-mono);
  font-weight: 800;
}

.content-grid,
.feature-grid,
.setup-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

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

.feature-card {
  min-width: 0;
  padding: 1.4rem;
  border-radius: 12px;
}

.feature-card.lead-feature {
  grid-column: span 2;
  background: color-mix(in srgb, var(--page-accent) 6%, white);
}

.feature-card h3 {
  font-size: 1.25rem;
}

.figure-container {
  margin: 0;
  padding: 0.7rem;
  border-radius: 14px;
  box-shadow: var(--shadow-card);
}

.figure-img {
  width: 100%;
  height: auto;
  border-radius: 9px;
}

.figure-caption {
  padding: 0.85rem 0.3rem 0.2rem;
  color: var(--text-muted);
  font-size: 0.82rem;
}

.code-panel {
  min-width: 0;
  padding: 1rem;
  border-radius: 10px;
  background: #0f1a29;
  color: #edf7ff;
  box-shadow: 0 14px 28px rgba(16, 33, 59, 0.14);
}

.code-panel pre {
  margin: 0;
  overflow-x: auto;
  color: #edf7ff;
  font-size: 0.85rem;
  line-height: 1.65;
  scrollbar-width: thin;
}

.code-panel code {
  color: inherit;
}

.code-label {
  display: block;
  margin-bottom: 0.65rem;
  color: #a9d8f6;
  font: 700 0.72rem var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.fact-table {
  border-radius: 12px;
  overflow: hidden;
}

.fact-row {
  min-width: 0;
  padding: 0.9rem 1rem;
  display: grid;
  grid-template-columns: minmax(10rem, 0.6fr) minmax(0, 1fr);
  gap: 1rem;
  border-top: 1px solid var(--border);
}

.fact-row:first-child {
  border-top: 0;
}

.fact-key {
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.fact-val {
  min-width: 0;
  color: var(--text-strong);
  overflow-wrap: anywhere;
}

.notice-panel {
  padding: 1.25rem 1.4rem;
  border-left: 4px solid var(--page-accent);
  border-radius: 6px 12px 12px 6px;
  color: var(--text-strong);
}

.status-line {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--success);
  font-size: 0.78rem;
  font-weight: 700;
}

.status-line::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: currentColor;
  box-shadow: 0 0 0 4px rgba(23, 99, 61, 0.12);
}

.registry-list {
  columns: 3 15rem;
  column-gap: 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.registry-list li {
  margin: 0 0 0.65rem;
  padding: 0.7rem 0.8rem;
  break-inside: avoid;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-surface);
  color: var(--text-strong);
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

.site-footer {
  margin-top: 2rem;
  border-top: 1px solid var(--border);
  background: #eaf3f9;
}

.footer-container {
  width: min(calc(100% - 2rem), var(--max-width));
  min-height: 120px;
  margin: 0 auto;
  padding: 2rem 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem 1.1rem;
}

.footer-links a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

@media (max-width: 900px) {
  .page-hero {
    grid-template-columns: minmax(0, 1fr) minmax(340px, 0.9fr);
    gap: 1.5rem;
  }

  .hero-scene {
    min-height: 390px;
  }

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

  .architecture-band {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 700px) {
  .site-header {
    position: static;
  }

  .nav-container {
    padding: 0.8rem 0;
    display: block;
  }

  .brand-link {
    margin-bottom: 0.7rem;
  }

  .site-nav {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.4rem;
  }

  .nav-link {
    border: 1px solid var(--border);
    background: var(--bg-surface);
  }

  .page-hero {
    min-height: auto;
    padding: 4rem 0;
    grid-template-columns: minmax(0, 1fr);
  }

  .page-hero h1 {
    font-size: clamp(3rem, 16vw, 4.8rem);
  }

  .hero-scene {
    min-height: auto;
    padding-top: 240px;
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 0.65rem;
    perspective: none;
  }

  .hero-scene::after {
    inset: 0 8% auto;
    height: 205px;
  }

  .scene-dock {
    top: 150px;
    width: 180px;
    transform: translate(-50%, -50%) rotateX(63deg);
  }

  .scene-mascot,
  .scene-mark {
    top: 95px;
    width: 135px;
  }

  .scene-panel {
    position: relative;
    inset: auto;
    width: 100%;
    min-height: 0;
    transform: none;
  }

  .product-overview {
    grid-template-columns: minmax(0, 1fr);
    grid-template-areas: "router" "code" "ide";
  }

  .product-card-router {
    min-height: 0;
  }

  .content-grid,
  .feature-grid,
  .setup-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .feature-card.lead-feature {
    grid-column: auto;
  }

  .system-route {
    grid-template-columns: minmax(0, 1fr);
  }

  .route-line {
    transform: rotate(90deg);
    justify-self: center;
  }

  .footer-container {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  .page-main,
  .nav-container,
  .footer-container {
    width: min(calc(100% - 1.25rem), var(--max-width));
  }

  .page-hero h1 {
    font-size: clamp(2.7rem, 15vw, 4rem);
  }

  .hero-actions,
  .button-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
  }

  .btn {
    width: 100%;
  }

  .fact-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 0.25rem;
  }

  .section-shell {
    padding: 3.5rem 0;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}