:root {
  --bg: #080c12;
  --card: #121820;
  --border: rgba(255, 255, 255, 0.08);
  --text: #e8edf5;
  --muted: #7a8899;
  --accent: #00c896;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: 'Onest', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
}
.wrap { max-width: 640px; margin: 0 auto; padding: 40px 20px 56px; }
h1 { font-size: 2rem; font-weight: 700; margin-bottom: 12px; }
h2 { font-size: 1.15rem; font-weight: 600; margin: 28px 0 12px; }
.tagline { color: var(--muted); font-size: 1.05rem; margin-bottom: 32px; }
p, li { color: var(--muted); margin-bottom: 10px; }
ol { margin-left: 20px; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.btn {
  display: inline-block;
  padding: 14px 24px;
  border-radius: 12px;
  font-weight: 600;
  text-decoration: none;
  font-size: 0.95rem;
}
.btn-primary { background: var(--accent); color: #041a12; }
.btn-secondary { background: var(--card); color: var(--text); border: 1px solid var(--border); }
footer { margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--border); font-size: 0.85rem; }
footer a { color: var(--accent); text-decoration: none; margin-right: 16px; }
label { display: block; font-size: 0.85rem; color: var(--muted); margin-bottom: 6px; }
input {
  width: 100%;
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 12px 14px;
  border-radius: 10px;
  font-size: 1rem;
  margin-bottom: 16px;
}
.msg { padding: 12px 14px; border-radius: 10px; margin-bottom: 16px; font-size: 0.9rem; }
.msg.error { background: rgba(255, 77, 77, 0.12); color: #ff8a8a; }
.msg.ok { background: rgba(0, 200, 150, 0.12); color: var(--accent); }
.cube-stage {
  width: 100%;
  height: 280px;
  margin: 24px 0 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 18px;
  background: radial-gradient(ellipse at center, rgba(0, 200, 150, 0.06) 0%, transparent 70%);
}
.cube-stage canvas { transition: filter 0.4s ease; pointer-events: auto; }
.cube-stage:hover canvas { filter: brightness(1.18) drop-shadow(0 0 24px rgba(0, 200, 150, 0.45)); }