/* SPIN321 Premium Landing — Standalone CSS (no Tailwind dependency) */
/* SEO IMPORTANT: All styles self-contained for local + hosting */

:root {
  --spin-neon: #c8ff00;
  --spin-neon-dim: #9bcc00;
  --spin-gold: #ffd700;
  --spin-purple: #a855f7;
  --spin-dark: #0a0a0f;
  --spin-card: rgba(18, 18, 28, 0.85);
  --spin-glass-border: rgba(200, 255, 0, 0.22);
  --spin-glow: 0 0 20px rgba(200, 255, 0, 0.5), 0 0 60px rgba(200, 255, 0, 0.18);
  --spin-glow-strong: 0 0 35px rgba(200, 255, 0, 0.75), 0 0 100px rgba(200, 255, 0, 0.3);
  --max-w: 1280px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: 'Segoe UI', system-ui, -apple-system, Roboto, sans-serif;
  background: var(--spin-dark);
  color: #e8e8f0;
  line-height: 1.7;
  overflow-x: hidden;
  min-height: 100vh;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
strong { color: #fff; }

/* ── Background particles ── */
.spin-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(168, 85, 247, 0.22), transparent),
    radial-gradient(ellipse 60% 40% at 90% 80%, rgba(200, 255, 0, 0.1), transparent),
    radial-gradient(ellipse 50% 30% at 10% 60%, rgba(255, 215, 0, 0.08), transparent),
    linear-gradient(180deg, #0a0a0f 0%, #12121c 50%, #0a0a0f 100%);
}
.spin-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(1.5px 1.5px at 20% 30%, rgba(200,255,0,0.5), transparent),
    radial-gradient(1.5px 1.5px at 60% 70%, rgba(255,215,0,0.4), transparent),
    radial-gradient(1.5px 1.5px at 80% 20%, rgba(168,85,247,0.45), transparent),
    radial-gradient(1px 1px at 40% 90%, rgba(200,255,0,0.3), transparent);
  background-size: 200px 200px;
  animation: spinParticles 20s linear infinite;
  opacity: 0.7;
}
@keyframes spinParticles {
  0% { transform: translateY(0); }
  100% { transform: translateY(-200px); }
}

/* ── Layout ── */
.wrap { max-width: var(--max-w); margin: 0 auto; padding: 0 1.25rem; }
.wrap-narrow { max-width: 860px; margin: 0 auto; padding: 0 1.25rem; }
.section { padding: 4rem 0; }
.section-alt { background: rgba(0,0,0,0.35); padding: 4rem 0; }
.text-center { text-align: center; }
.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mb-8 { margin-bottom: 2rem; }
.mb-12 { margin-bottom: 3rem; }
.mt-8 { margin-top: 2rem; }
.mt-10 { margin-top: 2.5rem; }
.mx-auto { margin-left: auto; margin-right: auto; }

/* ── Grid ── */
.grid-2 { display: grid; grid-template-columns: 1fr; gap: 1.5rem; }
.grid-3 { display: grid; grid-template-columns: 1fr; gap: 1.5rem; }
.grid-4 { display: grid; grid-template-columns: 1fr; gap: 1.5rem; }
.grid-hero { display: grid; grid-template-columns: 1fr; gap: 2.5rem; align-items: center; }
.grid-toc { display: grid; grid-template-columns: 1fr; gap: 0.5rem; }

@media (min-width: 640px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-toc { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 768px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-hero { grid-template-columns: 1fr 1fr; }
  .nav-links { display: flex !important; }
  .cta-row { flex-direction: row !important; }
  .footer-row { flex-direction: row !important; }
}
@media (min-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
  .grid-toc { grid-template-columns: repeat(3, 1fr); }
  .hero-title { font-size: 3.5rem !important; }
}

/* ── Navbar ── */
.spin-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 10, 15, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(200, 255, 0, 0.15);
  box-shadow: 0 4px 30px rgba(0,0,0,0.5);
}
.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0.75rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.nav-links { display: none; align-items: center; gap: 1.75rem; }
.nav-links a {
  color: #b0b0c0;
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 600;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--spin-neon); }
.nav-cta { padding: 0.6rem 1.25rem !important; font-size: 0.875rem !important; }

/* ── Hero ── */
.spin-hero {
  position: relative;
  padding: 3rem 0 4rem;
  min-height: 85vh;
  display: flex;
  align-items: center;
}
.spin-hero-glow {
  position: absolute;
  width: 700px;
  height: 700px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(200,255,0,0.15) 0%, rgba(168,85,247,0.08) 40%, transparent 70%);
  top: 40%;
  left: 30%;
  transform: translate(-50%, -50%);
  pointer-events: none;
  animation: spinHeroGlow 4s ease-in-out infinite alternate;
}
@keyframes spinHeroGlow {
  0% { opacity: 0.6; transform: translate(-50%,-50%) scale(1); }
  100% { opacity: 1; transform: translate(-50%,-50%) scale(1.2); }
}

.tagline {
  color: var(--spin-neon);
  font-weight: 800;
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  margin-bottom: 1rem;
  display: inline-block;
  padding: 0.35rem 0.85rem;
  background: rgba(200,255,0,0.08);
  border: 1px solid rgba(200,255,0,0.25);
  border-radius: 999px;
}

.hero-title {
  font-size: 2.25rem;
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 1.25rem;
  color: #fff;
}
.hero-desc {
  font-size: 1.0625rem;
  color: #b8b8c8;
  margin-bottom: 1.5rem;
  max-width: 540px;
}
.hero-desc strong { color: #e0e0e0; }

.badges { display: flex; flex-wrap: wrap; gap: 0.625rem; margin-bottom: 2rem; }
.spin-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.4rem 0.9rem;
  background: rgba(200,255,0,0.1);
  border: 1px solid rgba(200,255,0,0.3);
  border-radius: 999px;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--spin-neon);
}

.cta-row { display: flex; flex-direction: column; gap: 1rem; }
.promo-stack { display: flex; flex-direction: column; gap: 1rem; }
.promo-caption { font-size: 0.8125rem; color: #777; margin-top: 0.5rem; text-align: center; }

/* ── Typography ── */
.spin-neon-text {
  background: linear-gradient(135deg, var(--spin-neon) 0%, var(--spin-gold) 50%, var(--spin-neon-dim) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.spin-neon-text-purple {
  background: linear-gradient(135deg, var(--spin-purple) 0%, var(--spin-neon) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-title {
  font-size: 2rem;
  font-weight: 900;
  margin-bottom: 1rem;
}
.section-sub {
  color: #888;
  max-width: 640px;
  margin: 0 auto;
}
.text-neon { color: var(--spin-neon); }
.text-gold { color: var(--spin-gold); }
.text-muted { color: #999; }
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.font-bold { font-weight: 700; }
.font-black { font-weight: 900; }
.card-title { font-size: 1.125rem; font-weight: 700; color: var(--spin-neon); margin-bottom: 0.5rem; }
.card-title-gold { font-size: 1.25rem; font-weight: 700; color: var(--spin-gold); margin-bottom: 0.5rem; }
.card-text { color: #999; font-size: 0.875rem; }
.card-hot { color: var(--spin-neon); font-size: 0.875rem; font-weight: 600; margin-top: 0.75rem; }
.card-icon { font-size: 2rem; margin-bottom: 0.75rem; }

/* ── Glass cards ── */
.spin-glass {
  background: var(--spin-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--spin-glass-border);
  border-radius: 1rem;
  padding: 1.5rem;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}
.spin-glass:hover {
  transform: translateY(-5px);
  border-color: rgba(200,255,0,0.45);
  box-shadow: var(--spin-glow);
}

/* ── CTA Button ── */
.spin-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 1rem 2.25rem;
  font-weight: 800;
  font-size: 1.0625rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #0a0a0f !important;
  background: linear-gradient(135deg, #d4ff00 0%, #a8e600 40%, #ffd700 100%);
  border: none;
  border-radius: 999px;
  cursor: pointer;
  text-decoration: none !important;
  box-shadow: var(--spin-glow), inset 0 1px 0 rgba(255,255,255,0.35);
  transition: transform 0.2s, box-shadow 0.2s, filter 0.2s;
  animation: spinPulse 2.5s ease-in-out infinite;
}
.spin-cta:hover {
  transform: scale(1.06);
  box-shadow: var(--spin-glow-strong);
  filter: brightness(1.12);
}
.spin-cta:active { transform: scale(0.97); }
@keyframes spinPulse {
  0%, 100% { box-shadow: var(--spin-glow); }
  50% { box-shadow: var(--spin-glow-strong); }
}
.spin-cta-secondary {
  background: transparent !important;
  color: var(--spin-neon) !important;
  border: 2px solid var(--spin-neon);
  box-shadow: none;
  animation: none;
}
.spin-cta-secondary:hover {
  background: rgba(200,255,0,0.12) !important;
  box-shadow: var(--spin-glow);
}
.spin-cta-lg { font-size: 1.125rem; padding: 1.125rem 2.75rem; }

/* ── Steps ── */
.step-list { list-style: none; max-width: 800px; margin: 0 auto; }
.step-item { display: flex; gap: 1rem; align-items: flex-start; margin-bottom: 2rem; }
.spin-step-num {
  width: 3rem;
  height: 3rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 1.25rem;
  color: #0a0a0f;
  background: linear-gradient(135deg, var(--spin-neon), var(--spin-gold));
  border-radius: 50%;
  box-shadow: var(--spin-glow);
  flex-shrink: 0;
}
.step-title { font-weight: 700; font-size: 1.125rem; margin-bottom: 0.375rem; color: #fff; }
.step-desc { color: #999; font-size: 0.875rem; }
.step-desc a { color: var(--spin-neon); }

/* ── Table ── */
.spin-table-wrap { overflow-x: auto; margin-bottom: 2.5rem; border-radius: 0.75rem; border: 1px solid rgba(200,255,0,0.12); }
.spin-table { width: 100%; border-collapse: collapse; }
.spin-table th, .spin-table td { padding: 0.875rem 1rem; text-align: left; border-bottom: 1px solid rgba(200,255,0,0.08); font-size: 0.875rem; }
.spin-table th { background: rgba(200,255,0,0.1); color: var(--spin-neon); font-weight: 700; }
.spin-table tr:hover td { background: rgba(200,255,0,0.03); }

/* ── Promo images ── */
.spin-promo-img {
  border-radius: 0.875rem;
  border: 2px solid rgba(200,255,0,0.2);
  box-shadow: 0 12px 40px rgba(0,0,0,0.5), 0 0 30px rgba(200,255,0,0.08);
  width: 100%;
}

/* ── Content article ── */
.content-block h3 {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--spin-gold);
  margin: 2rem 0 0.75rem;
}
.content-block p {
  color: #b8b8c8;
  margin-bottom: 1rem;
  font-size: 0.9375rem;
}
.content-block em { color: var(--spin-neon-dim); font-style: normal; }

/* ── Testimonials ── */
.spin-testimonial { position: relative; padding-top: 2.5rem !important; }
.spin-testimonial::before {
  content: '"';
  position: absolute;
  top: 0.5rem;
  left: 1.25rem;
  font-size: 4rem;
  color: rgba(200,255,0,0.12);
  font-family: Georgia, serif;
  line-height: 1;
}
.testi-text { color: #c0c0d0; font-size: 0.875rem; margin-bottom: 1rem; font-style: italic; }
.testi-author { color: var(--spin-neon); font-weight: 600; font-size: 0.875rem; }

/* ── FAQ ── */
.spin-faq details {
  background: var(--spin-card);
  border: 1px solid var(--spin-glass-border);
  border-radius: 0.75rem;
  margin-bottom: 0.75rem;
}
.spin-faq details[open] {
  border-color: rgba(200,255,0,0.35);
  box-shadow: 0 0 20px rgba(200,255,0,0.1);
}
.spin-faq summary {
  padding: 1.125rem 1.25rem;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: #e0e0e0;
}
.spin-faq summary::-webkit-details-marker { display: none; }
.spin-faq summary::after { content: '+'; font-size: 1.5rem; color: var(--spin-neon); }
.spin-faq details[open] summary::after { content: '−'; }
.faq-answer { padding: 0 1.25rem 1.125rem; color: #999; font-size: 0.9375rem; }

/* ── TOC ── */
.spin-toc a { color: var(--spin-neon-dim); text-decoration: none; font-size: 0.875rem; }
.spin-toc a:hover { color: var(--spin-neon); }
.spin-toc ol { list-style: decimal inside; }

/* ── Author ── */
.spin-author { border-left: 4px solid var(--spin-gold); }

/* ── Footer ── */
.spin-footer {
  background: linear-gradient(180deg, transparent, rgba(10,10,15,0.98));
  border-top: 1px solid rgba(200,255,0,0.12);
  padding: 4rem 1.25rem;
  text-align: center;
}
.site-footer {
  border-top: 1px solid rgba(200,255,0,0.08);
  padding: 2rem 1.25rem;
  color: #666;
  font-size: 0.875rem;
}
.footer-row {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  justify-content: space-between;
}
.footer-row a { color: var(--spin-neon-dim); text-decoration: none; margin: 0 0.5rem; }
.footer-row a:hover { color: var(--spin-neon); }

:focus-visible { outline: 2px solid var(--spin-neon); outline-offset: 3px; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}
@media (max-width: 767px) {
  .spin-cta { width: 100%; }
  .hero-title { font-size: 1.875rem; }
  .section-title { font-size: 1.625rem; }
}