*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html, body { height: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background: radial-gradient(ellipse at 30% 20%, #1c2a44 0%, #0e1729 55%, #070c17 100%);
  color: #e6ebf5;
  min-height: 100%;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  letter-spacing: -0.01em;
  overflow-x: hidden;
}

/* Faded scientific double-helix backdrop */
.helix {
  position: fixed;
  inset: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}
.helix svg {
  width: 100%;
  max-width: 1600px;
  height: 130vh;
  opacity: 0.09;
  color: #6b9dff;
  filter: drop-shadow(0 0 20px rgba(74,123,214,0.3));
}
.helix-left  { transform: translateX(-42%) rotate(6deg); }
.helix-right { transform: translateX(42%) rotate(-6deg); }
@media (max-width: 900px) {
  .helix svg { opacity: 0.06; }
  .helix-left  { transform: translateX(-55%) rotate(6deg); }
  .helix-right { transform: translateX(55%) rotate(-6deg); }
}

main {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 60px 24px 40px;
  position: relative;
  z-index: 1;
  max-width: 720px;
  margin: 0 auto;
  width: 100%;
}

.mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 60px;
  height: 60px;
  border-radius: 14px;
  background: linear-gradient(135deg, #4a7bd6 0%, #2c56a8 100%);
  box-shadow: 0 12px 32px rgba(74,123,214,0.35);
  margin-bottom: 22px;
}
.mark svg { width: 28px; height: 28px; color: #fff; }

.logo-img {
  display: block;
  width: 100%;
  max-width: 340px;
  height: auto;
  margin: 0 auto 44px;
}
@media (max-width: 640px) {
  .logo-img { max-width: 260px; margin-bottom: 32px; }
}

h1 {
  font-size: clamp(38px, 6.5vw, 68px);
  font-weight: 800;
  line-height: 1.02;
  letter-spacing: -0.03em;
  margin-bottom: 40px;
  color: #f5f8ff;
}
h1 .light {
  font-weight: 300;
  color: #a5b6d8;
}

.tagline {
  font-size: clamp(15px, 1.8vw, 18px);
  font-style: italic;
  font-weight: 400;
  color: #a5b6d8;
  letter-spacing: 0.02em;
  margin: -24px 0 40px;
  opacity: 0.85;
}

.promo {
  font-size: clamp(20px, 3vw, 28px);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #f5f8ff;
  margin-bottom: 24px;
}
.promo .pct {
  color: #ff8c1a;
  font-weight: 800;
}
.promo-sub {
  font-size: 14px;
  color: #8a99b8;
  font-weight: 400;
  letter-spacing: 0.02em;
  margin-top: 6px;
}

.code-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 999px;
  font-size: 16px;
  color: #a5b6d8;
  font-weight: 500;
  margin-bottom: 32px;
  backdrop-filter: blur(8px);
}
.code-pill .code {
  color: #ff8c1a;
  font-weight: 800;
  font-size: 18px;
  letter-spacing: 1px;
}

.btn-shop {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 18px 40px;
  background: linear-gradient(135deg, #ff8c1a 0%, #ff6b0a 100%);
  color: #fff;
  border: none;
  border-radius: 999px;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.3px;
  text-decoration: none;
  cursor: pointer;
  box-shadow: 0 12px 32px rgba(255,140,26,0.35);
  transition: transform 0.2s, box-shadow 0.2s;
  font-family: inherit;
  min-width: 260px;
}
.btn-shop:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 42px rgba(255,140,26,0.45);
  color: #fff;
}
.btn-shop:active { transform: translateY(0); }
.btn-shop svg { width: 20px; height: 20px; }

.btn-sub {
  margin-top: 12px;
  font-size: 12px;
  color: #6b7fa8;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.trust-row {
  display: flex;
  justify-content: center;
  gap: 44px;
  margin-top: 56px;
  flex-wrap: wrap;
}
.trust-item {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #a5b6d8;
  font-size: 13px;
  font-weight: 600;
  text-align: left;
}
.trust-item svg { width: 24px; height: 24px; color: #4a7bd6; flex-shrink: 0; }
.trust-item .line1 { display: block; }
.trust-item .line2 { display: block; color: #6b7fa8; font-weight: 500; font-size: 12px; }

footer {
  padding: 20px;
  text-align: center;
  font-size: 12px;
  color: #4a5678;
  position: relative;
  z-index: 1;
}
footer a { color: #6b7fa8; text-decoration: none; }
footer a:hover { color: #a5b6d8; }

@media (max-width: 640px) {
  main { padding: 48px 20px 28px; }
  .wordmark { margin-bottom: 28px; }
  h1 { margin-bottom: 28px; }
  .trust-row { gap: 20px; margin-top: 40px; }
  .helix { opacity: 0.03; right: -160px; }
  .btn-shop { padding: 16px 32px; font-size: 16px; min-width: 240px; }
}

/* ─── VARIANT 2: Mix & Match volume pricing ─── */
.tier-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  width: 100%;
  max-width: 520px;
  margin: 0 auto 14px;
}
.tier-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 16px;
  padding: 22px 12px 18px;
  backdrop-filter: blur(8px);
  position: relative;
  transition: transform 0.2s, border-color 0.2s;
}
.tier-card:hover { transform: translateY(-3px); border-color: rgba(255,140,26,0.45); }
.tier-card.is-best {
  border-color: rgba(255,140,26,0.55);
  background: rgba(255,140,26,0.09);
  box-shadow: 0 10px 30px rgba(255,140,26,0.16);
}
.tier-pct {
  display: block;
  font-size: clamp(30px, 5vw, 40px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.03em;
  color: #ff8c1a;
}
.tier-qty {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  font-weight: 700;
  color: #e6ebf5;
  letter-spacing: 0.01em;
}
.tier-sub {
  display: block;
  margin-top: 2px;
  font-size: 11px;
  color: #6b7fa8;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.tier-flag {
  position: absolute;
  top: -9px;
  left: 50%;
  transform: translateX(-50%);
  background: #ff8c1a;
  color: #fff;
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: 999px;
  white-space: nowrap;
}
.tier-note {
  font-size: 13px;
  color: #8a99b8;
  max-width: 460px;
  margin: 0 auto 32px;
  line-height: 1.6;
}
.tier-note strong { color: #a5b6d8; font-weight: 600; }

@media (max-width: 560px) {
  .tier-grid { gap: 9px; max-width: 100%; }
  .tier-card { padding: 20px 6px 15px; border-radius: 13px; }
  .tier-qty { font-size: 12px; }
  .tier-sub { font-size: 10px; letter-spacing: 0.5px; }
  .tier-flag { font-size: 8px; padding: 3px 7px; }
}

/* ─── VARIANT 2 additions: stacked-savings breakdown ─── */
.tier-break {
  display: block;
  margin-top: 7px;
  padding-top: 7px;
  border-top: 1px solid rgba(255,255,255,0.10);
  font-size: 10px;
  font-weight: 600;
  color: #6b7fa8;
  letter-spacing: 0.02em;
  line-height: 1.35;
}
.tier-break .vol { color: #a5b6d8; }
.tier-break .cde { color: #ff8c1a; }
.tier-card.is-best .tier-break { border-top-color: rgba(255,140,26,0.28); }

.stack-strip {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
  padding: 11px 20px;
  margin: 0 auto 36px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 999px;
  backdrop-filter: blur(8px);
  font-size: 13px;
  font-weight: 600;
  color: #a5b6d8;
}
.stack-strip .chip { color: #e6ebf5; }
.stack-strip .chip b { color: #ff8c1a; font-weight: 800; }
.stack-strip .op { color: #4a5678; font-weight: 800; }
.stack-strip .eq { color: #ff8c1a; font-weight: 800; }

@media (max-width: 560px) {
  .tier-break { font-size: 9px; margin-top: 6px; padding-top: 6px; }
  .stack-strip { font-size: 11px; gap: 7px; padding: 10px 14px; }
}