/* PromptStack design system
   High-contrast, modern, conversion-first. Palette is variable-driven so the
   brand colours can be swapped from one place. */
:root {
  --bg: #0b0b14;
  --bg-soft: #12121f;
  --surface: #171728;
  --surface-2: #1e1e34;
  --ink: #f5f5fa;
  --ink-soft: #b9b9cc;
  --ink-mute: #8585a0;
  --line: #2a2a44;
  --accent: #7c5cff;
  --accent-2: #28e0c4;
  --accent-ink: #ffffff;
  --warn: #ffb020;
  --ok: #28e0c4;
  --radius: 16px;
  --radius-sm: 10px;
  --maxw: 1140px;
  --shadow: 0 20px 60px -20px rgba(0,0,0,.6);
  --shadow-card: 0 8px 30px -12px rgba(0,0,0,.55);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, system-ui, Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--accent-2); }
h1, h2, h3 { line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 .5em; font-weight: 800; }
h1 { font-size: clamp(2.1rem, 5vw, 3.4rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); }
h3 { font-size: 1.2rem; }
p { margin: 0 0 1rem; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 22px; }
.muted { color: var(--ink-soft); }
.small { font-size: .9rem; }
.center { text-align: center; }
.eyebrow {
  display: inline-block; font-size: .8rem; font-weight: 700; letter-spacing: .12em;
  text-transform: uppercase; color: var(--accent-2); margin-bottom: 14px;
}

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font: inherit; font-weight: 700; cursor: pointer; border: 0; border-radius: 999px;
  padding: 15px 28px; text-decoration: none; transition: transform .12s ease, box-shadow .2s ease, background .2s;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent), #9a7bff);
  color: var(--accent-ink); box-shadow: 0 10px 30px -8px rgba(124,92,255,.6);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 40px -10px rgba(124,92,255,.7); }
.btn-ghost { background: transparent; color: var(--ink); border: 1px solid var(--line); }
.btn-ghost:hover { border-color: var(--accent); color: #fff; }
.btn-buy {
  background: var(--accent-2); color: #04201c; box-shadow: 0 8px 22px -8px rgba(40,224,196,.55);
}
.btn-buy:hover { transform: translateY(-2px); }
.btn[disabled] { opacity: .6; cursor: wait; }
.btn-lg { padding: 18px 34px; font-size: 1.05rem; }
.btn-block { width: 100%; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 40;
  backdrop-filter: saturate(140%) blur(12px);
  background: rgba(11,11,20,.78); border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 66px; }
.brand-mark { font-weight: 900; font-size: 1.25rem; letter-spacing: -.03em; color: var(--ink); text-decoration: none; }
.brand-mark .dot { color: var(--accent); }
.nav-links { display: flex; gap: 26px; align-items: center; }
.nav-links a { color: var(--ink-soft); text-decoration: none; font-weight: 600; font-size: .95rem; }
.nav-links a:hover { color: #fff; }
.nav-cta { margin-left: 6px; }
@media (max-width: 760px) { .nav-links .hide-sm { display: none; } }

/* Hero */
.hero { position: relative; overflow: hidden; padding: 84px 0 64px; }
.hero::before {
  content: ""; position: absolute; inset: -40% 30% auto -10%; height: 620px;
  background: radial-gradient(closest-side, rgba(124,92,255,.30), transparent 70%);
  filter: blur(10px); z-index: 0;
}
.hero::after {
  content: ""; position: absolute; inset: 10% -10% auto 50%; height: 520px;
  background: radial-gradient(closest-side, rgba(40,224,196,.20), transparent 70%); z-index: 0;
}
.hero .wrap { position: relative; z-index: 1; }
.hero h1 { max-width: 16ch; }
.hero-sub { font-size: 1.2rem; color: var(--ink-soft); max-width: 56ch; margin: 0 0 28px; }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }
.hero-trust { display: flex; gap: 20px; flex-wrap: wrap; margin-top: 26px; color: var(--ink-mute); font-size: .92rem; }
.hero-trust span { display: inline-flex; align-items: center; gap: 7px; }
.hero-trust .tick { color: var(--accent-2); font-weight: 800; }

/* Value strip */
.valuestrip { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--bg-soft); }
.valuestrip .row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; padding: 26px 0; }
.valuestrip .item { color: var(--ink-soft); font-weight: 600; font-size: .98rem; display: flex; gap: 10px; align-items: flex-start; }
.valuestrip .item b { color: var(--ink); }
@media (max-width: 860px) { .valuestrip .row { grid-template-columns: repeat(2, 1fr); } }

/* Sections */
.section { padding: 72px 0; }
.section-head { max-width: 640px; margin: 0 auto 44px; text-align: center; }
.section-head p { color: var(--ink-soft); font-size: 1.08rem; }

/* Product grid */
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
@media (max-width: 960px) { .product-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .product-grid { grid-template-columns: 1fr; } }
.card {
  background: linear-gradient(180deg, var(--surface), var(--bg-soft));
  border: 1px solid var(--line); border-radius: var(--radius); padding: 24px;
  display: flex; flex-direction: column; box-shadow: var(--shadow-card);
  transition: transform .15s ease, border-color .2s ease;
}
.card:hover { transform: translateY(-4px); border-color: rgba(124,92,255,.6); }
.card .kicker { font-size: .78rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--accent-2); }
.card h3 { margin: 10px 0 6px; font-size: 1.25rem; }
.card .blurb { color: var(--ink-soft); font-size: .96rem; flex: 0 0 auto; }
.card ul { list-style: none; padding: 0; margin: 14px 0 18px; }
.card ul li { position: relative; padding-left: 24px; margin: 8px 0; color: var(--ink-soft); font-size: .93rem; }
.card ul li::before { content: "✓"; position: absolute; left: 0; color: var(--accent-2); font-weight: 800; }
.card .card-foot { margin-top: auto; display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.price { font-weight: 800; font-size: 1.5rem; color: #fff; }
.price small { font-size: .82rem; color: var(--ink-mute); font-weight: 600; }
.card a.detail { color: var(--ink-mute); font-size: .85rem; text-decoration: none; }
.card a.detail:hover { color: #fff; }

/* Bundle highlight */
.bundle {
  margin-top: 30px; border-radius: var(--radius);
  background:
    radial-gradient(120% 140% at 0% 0%, rgba(124,92,255,.25), transparent 60%),
    linear-gradient(180deg, var(--surface-2), var(--bg-soft));
  border: 1px solid rgba(124,92,255,.5); padding: 34px;
  display: grid; grid-template-columns: 1.4fr 1fr; gap: 26px; align-items: center;
  box-shadow: var(--shadow);
}
.bundle .save-pill { display: inline-block; background: var(--accent-2); color: #04201c; font-weight: 800; font-size: .8rem; padding: 5px 12px; border-radius: 999px; margin-bottom: 12px; }
.bundle h2 { margin: 0 0 10px; }
.bundle .priceline { display: flex; align-items: baseline; gap: 12px; margin: 6px 0 18px; }
.bundle .priceline .was { color: var(--ink-mute); text-decoration: line-through; font-size: 1.1rem; }
.bundle .priceline .now { font-size: 2.4rem; font-weight: 900; color: #fff; }
.bundle ul { columns: 2; gap: 18px; list-style: none; padding: 0; margin: 0; }
.bundle ul li { padding-left: 22px; position: relative; margin: 7px 0; color: var(--ink-soft); font-size: .92rem; }
.bundle ul li::before { content: "✓"; position: absolute; left: 0; color: var(--accent-2); font-weight: 800; }
@media (max-width: 820px) { .bundle { grid-template-columns: 1fr; } .bundle ul { columns: 1; } }

/* How it works */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
@media (max-width: 760px) { .steps { grid-template-columns: 1fr; } }
.step { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; }
.step .num { width: 38px; height: 38px; border-radius: 10px; display: grid; place-items: center; font-weight: 800; background: rgba(124,92,255,.18); color: #cbb8ff; margin-bottom: 14px; }

/* Guarantee */
.guarantee {
  display: flex; gap: 22px; align-items: center; background: var(--surface);
  border: 1px solid var(--line); border-radius: var(--radius); padding: 30px;
}
.guarantee .badge {
  flex: 0 0 auto; width: 86px; height: 86px; border-radius: 50%;
  background: radial-gradient(closest-side, rgba(40,224,196,.25), transparent), var(--surface-2);
  border: 2px solid var(--accent-2); display: grid; place-items: center; text-align: center;
  font-weight: 800; font-size: .72rem; color: var(--accent-2); line-height: 1.1;
}
@media (max-width: 620px) { .guarantee { flex-direction: column; text-align: center; } }

/* FAQ */
.faq { max-width: 820px; margin: 0 auto; }
.faq details { border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 0 20px; margin-bottom: 12px; background: var(--surface); }
.faq summary { cursor: pointer; font-weight: 700; padding: 18px 0; list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--accent-2); font-weight: 800; font-size: 1.3rem; }
.faq details[open] summary::after { content: "–"; }
.faq details p { color: var(--ink-soft); padding-bottom: 18px; margin: 0; }

/* Final CTA */
.finalcta { text-align: center; background: var(--bg-soft); border-top: 1px solid var(--line); }
.finalcta h2 { max-width: 18ch; margin-inline: auto; }

/* About */
.about { max-width: 760px; margin: 0 auto; color: var(--ink-soft); }
.about p { font-size: 1.05rem; }

/* Footer */
.site-footer { border-top: 1px solid var(--line); padding: 40px 0; color: var(--ink-mute); font-size: .9rem; }
.footer-row { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; align-items: center; }
.footer-links { display: flex; gap: 18px; flex-wrap: wrap; }
.footer-links a { color: var(--ink-mute); text-decoration: none; }
.footer-links a:hover { color: #fff; }

/* Product detail page */
.product-hero { padding: 60px 0 30px; }
.product-hero .crumbs { color: var(--ink-mute); font-size: .85rem; margin-bottom: 16px; }
.product-hero .crumbs a { color: var(--ink-mute); text-decoration: none; }
.product-layout { display: grid; grid-template-columns: 1.6fr 1fr; gap: 34px; align-items: start; }
@media (max-width: 860px) { .product-layout { grid-template-columns: 1fr; } }
.buybox { position: sticky; top: 86px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow-card); }
.buybox .price { font-size: 2.2rem; }
.buybox ul { list-style: none; padding: 0; margin: 16px 0; }
.buybox ul li { padding-left: 22px; position: relative; margin: 9px 0; color: var(--ink-soft); font-size: .93rem; }
.buybox ul li::before { content: "✓"; position: absolute; left: 0; color: var(--accent-2); font-weight: 800; }
.prose { color: var(--ink-soft); }
.prose h2 { color: #fff; margin-top: 1.6em; font-size: 1.5rem; }
.prose h3 { color: #fff; margin-top: 1.4em; }
.prose ul { padding-left: 20px; }
.prose li { margin: 7px 0; }
.inside-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 26px; }
.inside-grid div { padding-left: 24px; position: relative; color: var(--ink-soft); }
.inside-grid div::before { content: "✓"; position: absolute; left: 0; color: var(--accent-2); font-weight: 800; }
@media (max-width: 620px) { .inside-grid { grid-template-columns: 1fr; } }

/* Plain pages (policy / success) */
.page-plain { background: var(--bg); }
.legal { max-width: 760px; margin: 0 auto; padding: 60px 22px 90px; }
.legal h1 { margin-bottom: .4em; }
.legal h2 { font-size: 1.3rem; margin-top: 1.6em; }
.legal, .legal p, .legal li { color: var(--ink-soft); }
.legal a { color: var(--accent-2); }

/* Success page */
.success-wrap { max-width: 620px; margin: 0 auto; padding: 50px 22px 80px; text-align: center; }
.success-wrap .brand-mark { display: inline-block; margin-bottom: 30px; }
.success-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 40px 30px; box-shadow: var(--shadow); }
.success-icon { width: 64px; height: 64px; border-radius: 50%; display: grid; place-items: center; font-size: 1.8rem; font-weight: 800; margin: 0 auto 18px; }
.success-icon.ok { background: rgba(40,224,196,.16); color: var(--accent-2); border: 2px solid var(--accent-2); }
.success-icon.warn { background: rgba(255,176,32,.16); color: var(--warn); border: 2px solid var(--warn); }
.dl-list { display: flex; flex-direction: column; gap: 12px; margin: 22px 0; }
.dl-btn { display: block; background: linear-gradient(135deg, var(--accent), #9a7bff); color: #fff; text-decoration: none; font-weight: 700; padding: 15px; border-radius: var(--radius-sm); }
.dl-btn:hover { transform: translateY(-2px); }
.success-foot { margin-top: 26px; }
.spinner { width: 42px; height: 42px; border-radius: 50%; border: 4px solid var(--line); border-top-color: var(--accent); margin: 0 auto 18px; animation: spin 1s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* utility */
.notice { background: rgba(255,176,32,.12); border: 1px solid rgba(255,176,32,.4); color: #ffd98a; border-radius: var(--radius-sm); padding: 12px 16px; font-size: .92rem; margin-bottom: 18px; }
.hidden { display: none !important; }