:root {
  --bg: #131b24; --panel: #1a2531; --line: #35505a;
  --teal: #3fd6c4; --teal-hi: #7dffe8; --amber: #ffc94d; --rose: #ff5e7a;
  --ink: #e8f0ef; --ink-dim: #a8bfbb;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { background: var(--bg); color: var(--ink); font-family: ui-sans-serif, system-ui, "Segoe UI", sans-serif; }
img { max-width: 100%; }
a { color: var(--teal-hi); text-decoration: none; }

.nav { display: flex; align-items: center; gap: 18px; padding: 14px 22px;
  border-bottom: 1px solid var(--line); position: sticky; top: 0; background: rgba(19,27,36,.92);
  backdrop-filter: blur(6px); z-index: 30; }
.logo { font-weight: 700; letter-spacing: .14em; color: var(--teal-hi); font-size: 15px; }
.nav nav { display: flex; gap: 14px; flex: 1; justify-content: center; }
.nav nav a { color: var(--ink-dim); font-size: 14px; }
.nav nav a:hover { color: var(--ink); }
.btnplay { display: inline-block; background: linear-gradient(135deg, #1d6e66, #3fd6c4);
  color: #04211c; font-weight: 700; border-radius: 12px; padding: 10px 20px; letter-spacing: .04em;
  border: 1px solid var(--teal-hi); box-shadow: 0 4px 18px rgba(63,214,196,.25); }
.btnplay:hover { transform: translateY(-1px); }
.btnplay.big { font-size: 18px; padding: 14px 32px; }

.hero { display: grid; grid-template-columns: minmax(320px, 1fr) minmax(320px, 1.15fr);
  gap: 30px; align-items: center; padding: 48px 26px 40px; max-width: 1200px; margin: 0 auto; }
h1 { font-size: clamp(38px, 7vw, 64px); letter-spacing: .02em; line-height: 1.05;
  background: linear-gradient(90deg, var(--teal-hi), var(--amber));
  -webkit-background-clip: text; background-clip: text; color: transparent; }
.tagline { color: var(--amber); font-size: clamp(15px, 2.4vw, 19px); margin-top: 10px; letter-spacing: .06em; }
.sub { color: var(--ink-dim); margin-top: 14px; line-height: 1.6; max-width: 46ch; }
.herocta { margin-top: 24px; display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
.ghostlink { color: var(--ink-dim); font-size: 14px; }
.ghostlink:hover { color: var(--teal-hi); }
.herocanvas { position: relative; border: 1px solid var(--line); border-radius: 18px; overflow: hidden;
  box-shadow: 0 14px 50px rgba(0,0,0,.5); background: #0e141c; }
#hero-preview { display: block; width: 100%; aspect-ratio: 16 / 10; }

main { max-width: 1200px; margin: 0 auto; padding: 10px 26px 60px; }
section { margin-top: 60px; }
h2 { font-size: 26px; letter-spacing: .04em; margin-bottom: 18px; color: var(--teal-hi); }
.features { list-style: none; display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 14px; }
.features li { background: var(--panel); border: 1px solid var(--line); border-radius: 14px;
  padding: 16px 18px; font-size: 14.5px; line-height: 1.55; color: var(--ink-dim); }
.features b { color: var(--ink); }
.ctrls { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 14px; }
.ctrls div { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 16px 18px; }
.ctrls h3 { font-size: 14px; letter-spacing: .1em; color: var(--amber); margin-bottom: 8px; }
.ctrls p { font-size: 14px; line-height: 1.65; color: var(--ink-dim); }
.ctrls b { color: var(--ink); }
.p { color: var(--teal); } .e { color: var(--rose); }

#gallery { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 16px; }
#gallery h2 { grid-column: 1 / -1; margin-bottom: 0; }
#gallery .gnote { grid-column: 1 / -1; color: var(--ink-dim); font-size: 13px; margin-top: -8px; }
#gallery figure { border: 1px solid var(--line); border-radius: 14px; overflow: hidden; background: var(--panel); }
#gallery img { display: block; width: 100%; height: auto; }
#gallery figcaption { padding: 10px 14px; font-size: 13px; color: var(--ink-dim); }

footer { border-top: 1px solid var(--line); padding: 24px 26px; display: flex; gap: 18px;
  align-items: center; justify-content: space-between; flex-wrap: wrap;
  color: var(--ink-dim); font-size: 13px; max-width: 1200px; margin: 0 auto; }

@media (max-width: 760px) {
  .hero { grid-template-columns: 1fr; padding-top: 26px; }
  .nav nav { display: none; }
  h1 { font-size: 40px; }
}