:root {
  --bg: #0e1014;
  --bg-2: #15181e;
  --line: #262a33;
  --text: #e9ebef;
  --muted: #9aa1ad;
  --accent: #3b7bff;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 var(--sans);
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
img { display: block; max-width: 100%; }

.top {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px clamp(16px, 4vw, 48px);
  background: rgba(14, 16, 20, .82);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.mark { font-family: var(--serif); font-size: 20px; text-decoration: none; }
.mark em, .wordmark em { font-style: italic; }
.top nav { display: flex; align-items: center; gap: clamp(12px, 2.5vw, 28px); font-size: 15px; }
.top nav a { text-decoration: none; color: var(--muted); }
.top nav a:hover { color: var(--text); }
.lang {
  font: inherit; font-size: 13px; letter-spacing: .06em;
  color: var(--text); background: none; cursor: pointer;
  border: 1px solid var(--line); border-radius: 999px; padding: 4px 12px;
}
.lang:hover { border-color: var(--muted); }

section { padding: clamp(56px, 9vw, 120px) clamp(16px, 4vw, 48px); max-width: 1240px; margin: 0 auto; }
h2 { font-family: var(--serif); font-weight: 400; font-size: clamp(30px, 4vw, 46px); margin: 0 0 16px; }
h3 { font-size: 19px; margin: 0 0 8px; }

.hero {
  display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: clamp(28px, 5vw, 72px); align-items: center;
  padding-top: clamp(40px, 7vw, 96px);
}
.badge {
  display: inline-block; margin: 0 0 22px;
  font-size: 13px; letter-spacing: .08em; text-transform: uppercase; color: var(--muted);
  border: 1px solid var(--line); border-radius: 999px; padding: 5px 14px;
}
.wordmark { font-family: var(--serif); font-weight: 400; font-size: clamp(40px, 5.2vw, 80px); line-height: 1; margin: 0 0 18px; white-space: nowrap; }
.tagline { font-size: clamp(20px, 2.4vw, 26px); margin: 0 0 14px; }
.lead { color: var(--muted); margin: 0 0 30px; max-width: 34em; }
.cta {
  display: inline-block; text-decoration: none;
  background: var(--accent); color: #fff; padding: 12px 22px; border-radius: 10px; font-weight: 600;
  transition: transform .2s, box-shadow .2s;
}
.cta:hover { transform: translateY(-2px); box-shadow: 0 10px 30px rgba(59, 123, 255, .35); }

.compare {
  position: relative; margin: 0; overflow: hidden; border-radius: 16px;
  background: var(--bg-2); user-select: none; touch-action: pan-y;
  box-shadow: 0 30px 80px rgba(0, 0, 0, .45);
}
.compare img { width: 100%; height: auto; }
.compare .before-clip { position: absolute; inset: 0; clip-path: inset(0 calc(100% - var(--pos, 50%)) 0 0); }
.compare .before-clip img { width: 100%; height: 100%; object-fit: cover; }
.compare .handle {
  position: absolute; top: 0; bottom: 0; left: var(--pos, 50%); width: 2px; margin-left: -1px;
  background: #fff; box-shadow: 0 0 12px rgba(0, 0, 0, .5); pointer-events: none;
}
.compare .handle::after {
  content: ""; position: absolute; top: 50%; left: 50%; width: 38px; height: 38px; margin: -19px 0 0 -19px;
  border-radius: 50%; background: rgba(255, 255, 255, .92);
  box-shadow: 0 4px 14px rgba(0, 0, 0, .35);
  background-image: linear-gradient(90deg, transparent 13px, #222 13px 15px, transparent 15px 23px, #222 23px 25px, transparent 25px);
}
.compare .slider { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0; cursor: ew-resize; margin: 0; }
.compare .label {
  position: absolute; top: 12px; font-size: 12px; letter-spacing: .08em; text-transform: uppercase;
  padding: 3px 10px; border-radius: 999px; background: rgba(0, 0, 0, .55); color: #fff; pointer-events: none;
}
.compare .l-before { left: 12px; }
.compare .l-after { right: 12px; }

.cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; margin-top: 28px; }
.card { background: var(--bg-2); border: 1px solid var(--line); border-radius: 16px; padding: 28px; }
.card p { color: var(--muted); margin: 0 0 14px; }
.card ul { margin: 0; padding-left: 18px; color: var(--text); font-size: 15px; }
.card li { margin: 4px 0; }

.hint { color: var(--muted); margin: 0 0 28px; }
.grid { columns: 3 320px; column-gap: 18px; }
.grid .compare { break-inside: avoid; margin-bottom: 18px; box-shadow: none; border: 1px solid var(--line); }

.steps { list-style: none; padding: 0; margin: 28px 0 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 20px; }
.steps li { border-top: 1px solid var(--line); padding-top: 20px; }
.steps .n { font-family: var(--serif); font-size: 34px; color: var(--accent); display: block; margin-bottom: 6px; }
.steps p { color: var(--muted); margin: 0; font-size: 15px; }

footer {
  border-top: 1px solid var(--line); text-align: center;
  padding: 40px clamp(16px, 4vw, 48px) 56px; color: var(--muted);
}
footer p { margin: 6px auto; max-width: 760px; }
footer .small { font-size: 13px; }

.reveal { opacity: 0; transform: translateY(24px); transition: opacity .8s ease, transform .8s ease; }
.reveal.on { opacity: 1; transform: none; }

@media (max-width: 900px) {
  .hero, .cards, .steps { grid-template-columns: minmax(0, 1fr); }
  .top nav a { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
}