:root {
  --ink: #1a2332;
  --ink-soft: #3d4a5c;
  --paper: #f3f6f5;
  --paper-deep: #e6ecea;
  --ocean: #0e6b6e;
  --ocean-deep: #0a4f52;
  --foam: #b8d4d2;
  --sand: #b8956c;
  --tile-1: #7aa8a3;
  --tile-2: #c9a27a;
  --tile-3: #6b8cae;
  --tile-4: #9a7b8c;
  --max: 42rem;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(120% 80% at 100% -10%, #d7ebe8 0%, transparent 55%),
    radial-gradient(90% 60% at -10% 20%, #efe6d8 0%, transparent 45%),
    var(--paper);
  font-family: "Noto Sans SC", system-ui, sans-serif;
  font-size: 1.05rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--ocean-deep);
}

.site-header {
  display: flex;
  align-items: center;
  padding: 1.1rem 1.25rem;
  max-width: 72rem;
  margin: 0 auto;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-family: Outfit, "Noto Sans SC", system-ui, sans-serif;
  font-weight: 600;
  font-size: 1.12rem;
  letter-spacing: 0.01em;
  color: var(--ink);
  text-decoration: none;
}

.brand-logo {
  display: block;
  flex-shrink: 0;
  border-radius: 0.4rem;
}

.brand-logo-lg {
  border-radius: 0.55rem;
}

.brand:hover,
.brand:focus-visible {
  color: var(--ocean);
}

.hero {
  display: grid;
  gap: 2.5rem;
  padding: 1.25rem 1.25rem 3.5rem;
  max-width: 72rem;
  margin: 0 auto;
  align-items: center;
  min-height: calc(100svh - 4.5rem);
}

.hero-copy {
  max-width: 28rem;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  margin: 0 0 0.85rem;
  font-family: Outfit, system-ui, sans-serif;
  font-weight: 600;
  font-size: clamp(2.2rem, 7.5vw, 3.4rem);
  letter-spacing: 0.015em;
  line-height: 1.05;
  color: var(--ocean);
  opacity: 0;
  animation: rise 0.9s var(--ease) 0.05s forwards;
}

.hero h1 {
  margin: 0 0 1rem;
  font-family: "Noto Serif SC", serif;
  font-weight: 700;
  font-size: clamp(1.85rem, 6.2vw, 2.65rem);
  line-height: 1.25;
  letter-spacing: -0.02em;
  opacity: 0;
  animation: rise 0.9s var(--ease) 0.18s forwards;
}

.lede {
  margin: 0 0 1.6rem;
  color: var(--ink-soft);
  font-size: 1.05rem;
  max-width: 34ch;
  opacity: 0;
  animation: rise 0.9s var(--ease) 0.3s forwards;
}

.cta-row {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.75rem;
  opacity: 0;
  animation: rise 0.9s var(--ease) 0.42s forwards;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.85rem;
  padding: 0.7rem 1.25rem;
  border-radius: 0.55rem;
  font-weight: 600;
  font-size: 0.98rem;
  text-decoration: none;
  transition: background 0.2s ease, transform 0.2s ease;
}

.btn:focus-visible {
  outline: 2px solid var(--ocean);
  outline-offset: 3px;
}

.btn-primary {
  background: var(--ocean);
  color: #f7fffe;
}

.btn-primary:hover {
  background: var(--ocean-deep);
}

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

.cta-note {
  color: var(--ink-soft);
  font-size: 0.88rem;
}

.hero-visual {
  opacity: 0;
  animation: rise 1s var(--ease) 0.35s forwards;
}

.link-stage {
  position: relative;
  padding: 1.5rem 1rem 1.25rem;
  border-radius: 1.25rem;
  background:
    linear-gradient(160deg, rgba(255, 255, 255, 0.72), rgba(230, 236, 234, 0.9));
  border: 1px solid rgba(14, 107, 110, 0.12);
  box-shadow: 0 18px 50px rgba(26, 35, 50, 0.08);
  overflow: hidden;
}

.photo-stack {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  grid-template-rows: 7.5rem 5.5rem;
  gap: 0.55rem;
  margin-bottom: 1.35rem;
}

.tile {
  display: block;
  border-radius: 0.55rem;
  transform-origin: center;
  animation: settle 1.1s var(--ease) both;
}

.t1 {
  background:
    linear-gradient(135deg, #8ebfb8 0%, var(--tile-1) 55%, #4f7f7c 100%);
  grid-row: 1 / 3;
  animation-delay: 0.45s;
}

.t2 {
  background:
    linear-gradient(160deg, #e2c39a 0%, var(--tile-2) 70%, #9a7348 100%);
  animation-delay: 0.55s;
}

.t3 {
  background:
    linear-gradient(145deg, #9bb5d4 0%, var(--tile-3) 65%, #456584 100%);
  animation-delay: 0.65s;
}

.t4 {
  display: none;
}

.link-rail {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  margin: 0 0.15rem 0.85rem;
}

.rail-dot {
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: var(--ocean);
}

.rail-line {
  flex: 1;
  height: 2px;
  background: linear-gradient(90deg, var(--ocean), var(--foam));
  transform-origin: left center;
  animation: draw 0.9s var(--ease) 0.85s both;
}

.rail-lock {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.7rem;
  height: 1.7rem;
  border-radius: 50%;
  background: var(--ink);
  color: #eef7f6;
  font-size: 0.72rem;
  font-family: "Noto Serif SC", serif;
}

.link-chip {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.15rem;
  padding: 0.85rem 1rem;
  border-radius: 0.7rem;
  background: var(--ink);
  color: #d7e8e6;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.82rem;
  letter-spacing: -0.01em;
  overflow-wrap: anywhere;
}

.chip-proto {
  color: var(--foam);
}

.chip-host {
  color: #f4fbfa;
}

.chip-key {
  color: #f0c98a;
}

.section {
  padding: 3.25rem 1.25rem;
  max-width: var(--max);
  margin: 0 auto;
}

.section + .section {
  border-top: 1px solid rgba(26, 35, 50, 0.08);
}

.section h2 {
  margin: 0 0 0.85rem;
  font-family: "Noto Serif SC", serif;
  font-weight: 700;
  font-size: clamp(1.45rem, 4.5vw, 1.85rem);
  line-height: 1.3;
  letter-spacing: -0.02em;
}

.section-lead {
  margin: 0;
  color: var(--ink-soft);
  max-width: 36ch;
}

.compare-wrap {
  margin-top: 1.75rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid rgba(14, 107, 110, 0.22);
  border-radius: 0.75rem;
  background: rgba(255, 255, 255, 0.55);
}

.compare-table {
  width: 100%;
  min-width: 20rem;
  border-collapse: collapse;
  font-size: 0.92rem;
  line-height: 1.45;
}

.compare-table th,
.compare-table td {
  padding: 0.85rem 0.75rem;
  text-align: left;
  vertical-align: top;
  border: 1px solid rgba(26, 35, 50, 0.1);
}

.compare-table thead th {
  font-family: Outfit, "Noto Sans SC", system-ui, sans-serif;
  font-weight: 600;
  font-size: 0.9rem;
  letter-spacing: 0.01em;
  color: var(--ink);
  background: rgba(14, 107, 110, 0.08);
  white-space: nowrap;
}

.compare-table thead th:first-child {
  color: var(--ink-soft);
  font-family: "Noto Sans SC", system-ui, sans-serif;
  font-weight: 500;
}

.compare-table tbody th {
  font-weight: 600;
  color: var(--ink);
  width: 28%;
  background: rgba(243, 246, 245, 0.65);
}

.compare-table td {
  color: var(--ink-soft);
  width: 36%;
}

.compare-table td.is-better {
  color: var(--ocean-deep);
  font-weight: 500;
  background: rgba(14, 107, 110, 0.04);
}

@media (min-width: 640px) {
  .compare-table th,
  .compare-table td {
    padding: 0.95rem 0.9rem;
  }

  .compare-table {
    font-size: 0.98rem;
  }
}

.steps {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
  counter-reset: step;
  display: grid;
  gap: 1.35rem;
}

.steps li {
  position: relative;
  padding-left: 2.6rem;
  counter-increment: step;
}

.steps li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0.1rem;
  width: 1.8rem;
  height: 1.8rem;
  border-radius: 0.45rem;
  background: var(--paper-deep);
  color: var(--ocean-deep);
  font-family: Outfit, system-ui, sans-serif;
  font-weight: 600;
  font-size: 0.95rem;
  display: grid;
  place-items: center;
}

.steps strong {
  display: block;
  margin-bottom: 0.25rem;
  font-weight: 600;
}

.steps span {
  color: var(--ink-soft);
  font-size: 0.98rem;
}

.features {
  display: grid;
  gap: 0;
}

.feature {
  padding: 1.6rem 0;
}

.feature + .feature {
  border-top: 1px dashed rgba(14, 107, 110, 0.28);
}

.feature h3 {
  margin: 0 0 0.45rem;
  font-size: 1.12rem;
  font-weight: 600;
}

.feature p {
  margin: 0;
  color: var(--ink-soft);
  max-width: 38ch;
}

.platform-list {
  list-style: none;
  margin: 1.75rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.7rem;
}

.platform-list li {
  padding: 0.85rem 1rem;
  background: rgba(255, 255, 255, 0.55);
  border-left: 3px solid var(--foam);
  color: var(--ink-soft);
}

.platform-list em {
  font-style: normal;
  font-weight: 600;
  color: var(--ocean);
  margin-right: 0.55rem;
}

.closing .btn {
  margin-top: 1.5rem;
}

.site-footer {
  padding: 2.5rem 1.25rem 3rem;
  max-width: var(--max);
  margin: 0 auto;
  border-top: 1px solid rgba(26, 35, 50, 0.08);
}

.site-footer .brand {
  font-size: 1rem;
}

.fine {
  margin: 0.55rem 0 0;
  color: var(--ink-soft);
  font-size: 0.85rem;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes settle {
  from {
    opacity: 0;
    transform: translateY(12px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes draw {
  from {
    transform: scaleX(0);
  }
  to {
    transform: scaleX(1);
  }
}

@media (min-width: 860px) {
  .hero {
    grid-template-columns: 1fr 1.05fr;
    gap: 3.5rem;
    padding: 2rem 2rem 4rem;
  }

  .hero-copy {
    max-width: none;
  }

  .lede {
    max-width: 38ch;
  }

  .photo-stack {
    grid-template-columns: 1.2fr 0.9fr 0.8fr;
    grid-template-rows: 8.5rem 6rem;
  }

  .t1 {
    grid-row: 1 / 3;
  }

  .t4 {
    display: block;
    background:
      linear-gradient(150deg, #c4a0b0 0%, var(--tile-4) 70%, #6d4d5c 100%);
    animation-delay: 0.7s;
  }

  .section {
    padding-left: 2rem;
    padding-right: 2rem;
  }

  .site-header,
  .site-footer {
    padding-left: 2rem;
    padding-right: 2rem;
  }
}

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

  .brand-mark,
  .hero h1,
  .lede,
  .cta-row,
  .hero-visual,
  .tile,
  .rail-line {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
}