:root {
  --bg: #070708;
  --card: rgba(18, 18, 20, 0.86);
  --line: rgba(255, 255, 255, 0.08);
  --text: #f6f4f1;
  --muted: #9b9aa3;
  --gold: #ffb800;
  --orange: #ff6a00;
  --gradient: linear-gradient(135deg, var(--orange), var(--gold));
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  background:
    radial-gradient(circle at 100% 0%, rgba(255, 106, 0, 0.16), transparent 32%),
    radial-gradient(circle at 0% 100%, rgba(255, 184, 0, 0.08), transparent 28%),
    var(--bg);
  color: var(--text);
  font-family: Tahoma, "Segoe UI", system-ui, sans-serif;
  line-height: 1.85;
}

a { color: var(--gold); text-decoration: none; }
a:hover { text-decoration: underline; }

.sp-top, .sp-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 6vw;
}
.sp-top {
  position: sticky;
  top: 0;
  z-index: 5;
  background: rgba(7, 7, 8, 0.78);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
}
.sp-logo, .sp-enter {
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--text);
  text-decoration: none;
}
.sp-logo { font-size: 1.15rem; }
.sp-enter {
  border: 1px solid rgba(255, 184, 0, 0.45);
  border-radius: 999px;
  padding: 8px 16px;
  color: var(--gold);
}
.sp-nav, .sp-foot nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  justify-content: center;
}
.sp-nav a, .sp-foot nav a {
  color: var(--muted);
  font-size: 0.92rem;
}
.sp-nav a[aria-current="page"] { color: var(--gold); }

.sp-main { padding: 42px 6vw 64px; }
.sp-card {
  max-width: 860px;
  margin: 0 auto;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 28px;
  padding: 42px 40px 48px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.35);
}
.sp-kicker {
  margin: 0 0 8px;
  color: var(--gold);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.sp-code {
  margin: 0;
  font-size: clamp(4.5rem, 12vw, 7.5rem);
  line-height: 0.9;
  font-weight: 800;
  letter-spacing: -0.06em;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
h1 {
  margin: 0 0 12px;
  font-size: clamp(1.8rem, 4vw, 2.7rem);
  line-height: 1.35;
}
.sp-lead { margin: 0 0 8px; color: #ddd; font-size: 1.05rem; }
.sp-updated { margin: 0 0 22px; color: var(--muted); font-size: 0.88rem; }
.sp-body h2 { margin: 28px 0 8px; font-size: 1.25rem; }
.sp-body h3 { margin: 22px 0 8px; font-size: 1.05rem; color: var(--gold); }
.sp-body p { margin: 0 0 12px; }
.sp-body ul { margin: 0 0 14px; padding: 0 1.2em 0 0; }
.sp-body li { margin: 0 0 6px; }
.sp-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 28px; }
.sp-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 999px;
  background: var(--gradient);
  color: #16120c;
  font-weight: 800;
  text-decoration: none;
}
.sp-btn:hover { text-decoration: none; filter: brightness(1.05); }
.sp-btn-ghost {
  background: transparent;
  color: var(--gold);
  border: 1px solid rgba(255, 184, 0, 0.45);
}
.sp-foot {
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.88rem;
}

@media (max-width: 760px) {
  .sp-top { align-items: flex-start; flex-wrap: wrap; }
  .sp-nav { order: 3; width: 100%; justify-content: flex-start; }
  .sp-card { padding: 28px 20px 32px; border-radius: 22px; }
  .sp-foot { flex-direction: column; align-items: flex-start; }
}