:root {
  --bg-0: #060607;
  --bg-1: #0d0d0f;
  --bg-2: #1a1a1d;
  --panel: #141416;
  --panel-2: #1c1c1f;
  --border: rgba(255,255,255,0.08);
  --border-2: rgba(255,255,255,0.14);
  --text: #f2f2f3;
  --text-dim: #a3a3a8;
  --text-faint: #6c6c72;
  --accent-a: #8b5cf6;
  --accent-b: #38bdf8;
  --danger: #ff5c5c;
  --radius: 18px;
  --radius-sm: 12px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: 'Manrope', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 15% -10%, rgba(139,92,246,0.10), transparent 60%),
    radial-gradient(900px 500px at 100% 0%, rgba(56,189,248,0.08), transparent 55%),
    linear-gradient(180deg, var(--bg-0) 0%, var(--bg-1) 40%, #000 100%);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  position: relative;
  overflow-x: hidden;
}

.bg-glow {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    radial-gradient(1px 1px at 20px 30px, rgba(255,255,255,0.25), transparent),
    radial-gradient(1px 1px at 120px 80px, rgba(255,255,255,0.15), transparent),
    radial-gradient(1px 1px at 300px 200px, rgba(255,255,255,0.2), transparent);
  opacity: 0.4;
  z-index: 0;
}

.container {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(16px);
  background: rgba(8,8,9,0.6);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 800;
  font-size: 17px;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.logo-star {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--accent-a), var(--accent-b));
  color: #fff;
  font-size: 15px;
}

.nav {
  display: flex;
  gap: 28px;
}

.nav a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 14.5px;
  font-weight: 600;
  transition: color 0.2s ease;
}

.nav a:hover { color: var(--text); }

/* Hero */
.hero {
  padding: 96px 0 72px;
  text-align: center;
}

.badge {
  display: inline-block;
  padding: 7px 16px;
  border-radius: 999px;
  border: 1px solid var(--border-2);
  background: rgba(255,255,255,0.03);
  color: var(--text-dim);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero h1 {
  font-size: 44px;
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin: 0 0 18px;
}

.grad-text {
  background: linear-gradient(135deg, var(--accent-a), var(--accent-b));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-sub {
  max-width: 560px;
  margin: 0 auto;
  color: var(--text-dim);
  font-size: 16.5px;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 14px;
  margin-top: 34px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 26px;
  border-radius: 12px;
  font-weight: 700;
  font-size: 14.5px;
  text-decoration: none;
  transition: transform 0.15s ease, opacity 0.15s ease;
  white-space: nowrap;
}

.btn:active { transform: scale(0.97); }

.btn-primary {
  background: linear-gradient(135deg, var(--accent-a), var(--accent-b));
  color: #fff;
  box-shadow: 0 8px 24px rgba(139,92,246,0.25);
}

.btn-primary:hover { opacity: 0.92; }

.btn-ghost {
  background: rgba(255,255,255,0.04);
  color: var(--text);
  border: 1px solid var(--border-2);
}

.btn-ghost:hover { background: rgba(255,255,255,0.07); }

/* Section head */
.section-head {
  text-align: center;
  max-width: 480px;
  margin: 0 auto 52px;
}

.section-num {
  display: block;
  font-size: 13px;
  font-weight: 800;
  color: var(--accent-b);
  letter-spacing: 0.1em;
  margin-bottom: 10px;
}

.section-head h2 {
  font-size: 30px;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 10px;
}

.section-head p {
  color: var(--text-dim);
  font-size: 15px;
  margin: 0;
}

/* Steps */
.steps { padding: 40px 0 90px; }

.steps-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-width: 720px;
  margin: 0 auto;
}

.step {
  display: flex;
  gap: 20px;
  padding: 22px 24px;
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  border: 1px solid var(--border);
}

.step-highlight {
  border-color: rgba(139,92,246,0.35);
  background: linear-gradient(180deg, rgba(139,92,246,0.10), var(--panel-2));
}

.step-num {
  flex-shrink: 0;
  width: 38px;
  height: 38px;
  border-radius: 11px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 15px;
  background: rgba(255,255,255,0.06);
  color: var(--text);
  border: 1px solid var(--border-2);
}

.step-highlight .step-num {
  background: linear-gradient(135deg, var(--accent-a), var(--accent-b));
  border: none;
  color: #fff;
}

.step-body h3 {
  margin: 3px 0 6px;
  font-size: 16.5px;
  font-weight: 700;
}

.step-body p {
  margin: 0;
  color: var(--text-dim);
  font-size: 14.5px;
  line-height: 1.6;
}

code {
  background: rgba(255,255,255,0.08);
  border: 1px solid var(--border-2);
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 13.5px;
  color: #d9c9ff;
  font-family: 'SF Mono', Consolas, monospace;
}

/* Errors */
.errors { padding: 20px 0 100px; }

.errors-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.error-card {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 32px;
  align-items: center;
  padding: 28px;
  border-radius: var(--radius);
  background: linear-gradient(160deg, var(--panel), var(--panel-2));
  border: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}

.error-card::before {
  content: "";
  position: absolute;
  top: -40%;
  right: -20%;
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, rgba(139,92,246,0.10), transparent 70%);
  pointer-events: none;
}

.error-card.reverse {
  grid-template-columns: 1fr 300px;
}

.error-card.reverse .error-shot { order: 2; }
.error-card.reverse .error-info { order: 1; }

.error-shot {
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--border-2);
  background: radial-gradient(120% 120% at 50% 0%, #1a1a1d, #000);
  height: 360px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.error-shot img {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
  display: block;
  border-radius: 10px;
  box-shadow: 0 12px 30px rgba(0,0,0,0.45);
}

.addition-card {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 32px;
  align-items: center;
  padding: 28px;
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(52,211,153,0.09), var(--panel-2));
  border: 1px solid rgba(52,211,153,0.28);
  position: relative;
  overflow: hidden;
  margin-bottom: 28px;
}

.addition-card::before {
  content: "";
  position: absolute;
  top: -40%;
  right: -20%;
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, rgba(52,211,153,0.14), transparent 70%);
  pointer-events: none;
}

.addition-tag {
  display: inline-block;
  font-size: 12.5px;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: #34d399;
  background: rgba(52,211,153,0.10);
  border: 1px solid rgba(52,211,153,0.3);
  padding: 5px 12px;
  border-radius: 999px;
  margin-bottom: 12px;
}

.error-tag {
  display: inline-block;
  font-size: 12.5px;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--danger);
  background: rgba(255,92,92,0.10);
  border: 1px solid rgba(255,92,92,0.25);
  padding: 5px 12px;
  border-radius: 999px;
  margin-bottom: 12px;
}

.error-info h3 {
  margin: 0 0 12px;
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.error-info p {
  margin: 0 0 10px;
  color: var(--text-dim);
  font-size: 14.5px;
  line-height: 1.65;
}

.error-info strong { color: var(--text); }

.step-body a,
.error-info p a {
  color: var(--accent-b);
  text-decoration: none;
  font-weight: 700;
}

.step-body a:hover,
.error-info p a:hover { text-decoration: underline; }

.error-list {
  margin: 10px 0 0;
  padding-left: 18px;
  color: var(--text-dim);
  font-size: 14.5px;
  line-height: 1.9;
}

.error-list a {
  color: var(--accent-b);
  text-decoration: none;
}

.error-list a:hover { text-decoration: underline; }

.code-block {
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: #000;
  border: 1px solid var(--border-2);
  border-radius: 10px;
  padding: 14px 16px;
  margin: 12px 0;
  font-family: 'SF Mono', Consolas, monospace;
  font-size: 14px;
  color: #a7f3d0;
}

.code-block.single { color: #93c5fd; }

/* Seller / Footer */
.seller {
  padding: 90px 0 70px;
  text-align: center;
  border-top: 1px solid var(--border);
  background: linear-gradient(180deg, transparent, rgba(139,92,246,0.05));
}

.seller-badge {
  width: 56px;
  height: 56px;
  margin: 0 auto 18px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--accent-a), var(--accent-b));
  font-size: 26px;
  color: #fff;
}

.seller h2 {
  font-size: 26px;
  font-weight: 800;
  margin: 0 0 12px;
}

.seller-desc {
  color: var(--text-dim);
  font-size: 15px;
  max-width: 480px;
  margin: 0 auto 30px;
}

.seller-card {
  max-width: 640px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 22px 26px;
  border-radius: var(--radius);
  background: linear-gradient(160deg, var(--panel), var(--panel-2));
  border: 1px solid var(--border-2);
  text-align: left;
  flex-wrap: wrap;
}

.seller-card-text {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.seller-label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--text-faint);
  text-transform: uppercase;
}

.seller-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  max-width: 360px;
}

.copyright {
  margin-top: 40px;
  color: var(--text-faint);
  font-size: 13px;
}

/* Responsive */
@media (max-width: 760px) {
  .hero { padding: 64px 0 56px; }
  .hero h1 { font-size: 32px; }
  .nav { gap: 18px; }
  .nav a { font-size: 13.5px; }
  .error-card,
  .error-card.reverse,
  .addition-card {
    grid-template-columns: 1fr;
  }
  .error-shot {
    order: -1 !important;
    height: 260px;
    width: 100%;
    max-width: 100%;
    margin: 0 auto;
  }
  .error-info { order: 0 !important; }
  .seller-card { flex-direction: column; align-items: flex-start; }
}