/* ============================================================================
   A4:2026 Speed-Index — sales page
   Premium, conversion-first, one accent (electric amber). Inter + JetBrains Mono.
   ========================================================================== */
:root {
  --bg: #07090f;
  --bg-2: #0b0e16;
  --surface: #11141f;
  --surface-2: #161a27;
  --line: rgba(255, 255, 255, 0.08);
  --line-2: rgba(255, 255, 255, 0.14);
  --text: #f1f3f9;
  --text-2: #a9b2c5;
  --text-3: #6a7388;
  --accent: #ffb020;
  --accent-2: #ff6a3d;
  --accent-soft: rgba(255, 176, 32, 0.12);
  --ok: #3ec98a;
  --max: 1080px;
  --r: 16px;
  --r-lg: 22px;
  --ease: cubic-bezier(.22, 1, .36, 1);
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", ui-monospace, Menlo, monospace;
}

* { box-sizing: border-box; margin: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }
.narrow { max-width: 760px; }
.center { text-align: center; }
a { color: inherit; }
::selection { background: var(--accent); color: #1a1200; }

h1, h2, h3, h4 { letter-spacing: -0.025em; line-height: 1.1; font-weight: 800; }
.hl { color: var(--accent); }

/* ───────────────────────── NAV ───────────────────────── */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid var(--line);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 11px; font-weight: 700; font-size: 16px; }
.brand-mark {
  display: grid; place-items: center; width: 34px; height: 34px; border-radius: 9px;
  background: linear-gradient(145deg, var(--accent), var(--accent-2));
  color: #1a1200; font-family: var(--mono); font-weight: 700; font-size: 14px;
}
.nav-cta {
  text-decoration: none; font-weight: 600; font-size: 14px; padding: 9px 16px; border-radius: 10px;
  background: var(--accent); color: #1a1200; transition: .16s var(--ease);
}
.nav-cta:hover { filter: brightness(1.06); }

/* ───────────────────────── HERO ───────────────────────── */
.hero { position: relative; padding: 96px 0 80px; overflow: hidden; }
.hero-glow {
  position: absolute; top: -180px; right: -120px; width: 620px; height: 620px;
  background: radial-gradient(circle, var(--accent-soft), transparent 65%);
  filter: blur(20px); pointer-events: none; z-index: 0;
}
.hero .wrap { position: relative; z-index: 1; }
.kicker {
  display: inline-flex; align-items: center; gap: 9px; font-family: var(--mono); font-size: 12.5px;
  letter-spacing: .06em; text-transform: uppercase; color: var(--accent);
  background: var(--accent-soft); border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
  padding: 7px 14px; border-radius: 999px; margin-bottom: 26px;
}
.kicker-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 10px var(--accent); }
.hero h1 { font-size: clamp(36px, 6.2vw, 64px); font-weight: 900; max-width: 14ch; }
.hero .sub { margin-top: 24px; font-size: clamp(17px, 2.4vw, 20px); color: var(--text-2); max-width: 60ch; }
.hero .sub strong { color: var(--text); }
.hero-cta { margin-top: 38px; display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
.cta-note { font-size: 13.5px; color: var(--text-3); }
.hero-points { list-style: none; margin-top: 40px; display: grid; gap: 12px; max-width: 56ch; }
.hero-points li { display: flex; gap: 12px; font-size: 15.5px; color: var(--text-2); }
.hero-points li span { color: var(--accent); font-weight: 700; flex: none; }

/* ───────────────────────── BUTTONS ───────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 10px; justify-content: center;
  font-weight: 700; text-decoration: none; border-radius: 12px; border: 1px solid transparent;
  cursor: pointer; transition: .18s var(--ease); font-family: var(--font);
}
.btn-primary {
  background: linear-gradient(145deg, var(--accent), var(--accent-2));
  color: #1a1200; box-shadow: 0 14px 36px -12px rgba(255, 140, 40, .5);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 20px 44px -12px rgba(255, 140, 40, .6); }
.btn-lg { font-size: 16.5px; padding: 16px 28px; }
.btn-block { width: 100%; }
.btn-strike { font-weight: 600; opacity: .6; text-decoration: line-through; font-size: .82em; margin-left: 2px; }

/* ───────────────────────── SECTIONS ───────────────────────── */
.section { padding: 86px 0; border-top: 1px solid var(--line); }
.section-alt { background: var(--bg-2); }
.eyebrow {
  font-family: var(--mono); font-size: 12px; letter-spacing: .14em; text-transform: uppercase;
  color: var(--accent); font-weight: 600; margin-bottom: 16px;
}
.section h2 { font-size: clamp(27px, 4vw, 40px); max-width: 20ch; line-height: 1.12; }
.section-lede { margin-top: 18px; font-size: 18px; color: var(--text-2); max-width: 64ch; }
.prose { margin-top: 22px; }
.prose p { font-size: 17px; color: var(--text-2); margin-bottom: 16px; }
.prose strong, .section-lede strong { color: var(--text); }
.prose em { color: var(--text); font-style: italic; }

/* PROBLEM */
.pain-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 40px; }
.pain {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--r);
  padding: 24px 22px; position: relative;
}
.pain-num {
  display: grid; place-items: center; width: 34px; height: 34px; border-radius: 9px;
  background: var(--accent-soft); color: var(--accent); font-family: var(--mono); font-weight: 700;
  margin-bottom: 16px;
}
.pain p { font-size: 14.5px; color: var(--text-2); }
.pain strong { color: var(--text); }

/* MECHANISM */
.mech-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 44px; }
.mech {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: 28px 26px; transition: .2s var(--ease);
}
.mech:hover { border-color: var(--line-2); transform: translateY(-3px); }
.mech-ico {
  font-size: 26px; width: 52px; height: 52px; display: grid; place-items: center; border-radius: 13px;
  background: var(--accent-soft); color: var(--accent); margin-bottom: 18px;
}
.mech h3 { font-size: 18px; margin-bottom: 11px; }
.mech p { font-size: 14.5px; color: var(--text-2); }
.mech em { color: var(--text); font-style: italic; }

/* INSIDE */
.inside-grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: 20px; margin-top: 44px; align-items: start; }
.inside-feature {
  background: linear-gradient(165deg, var(--surface-2), var(--surface));
  border: 1px solid var(--line-2); border-radius: var(--r-lg); padding: 30px;
  position: sticky; top: 84px;
}
.inside-tag {
  display: inline-block; font-family: var(--mono); font-size: 11px; letter-spacing: .1em;
  text-transform: uppercase; color: var(--accent); background: var(--accent-soft);
  padding: 4px 11px; border-radius: 999px; margin-bottom: 16px;
}
.inside-feature h3 { font-size: 23px; margin-bottom: 12px; }
.inside-feature > p { font-size: 15px; color: var(--text-2); margin-bottom: 20px; }
.inside-feature ul { list-style: none; display: grid; gap: 11px; }
.inside-feature li { font-size: 14.5px; color: var(--text-2); padding-left: 24px; position: relative; }
.inside-feature li::before { content: "▸"; position: absolute; left: 4px; color: var(--accent); }
.inside-list { display: grid; gap: 12px; }
.inside-item { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); padding: 19px 22px; transition: .16s var(--ease); }
.inside-item:hover { border-color: var(--line-2); }
.inside-item h4 { font-size: 15.5px; margin-bottom: 6px; }
.inside-item p { font-size: 13.5px; color: var(--text-2); }

/* PRICE */
.price-card {
  background: linear-gradient(165deg, var(--surface-2), var(--surface));
  border: 1px solid var(--line-2); border-radius: var(--r-lg); padding: 38px 34px;
  margin-top: 36px; box-shadow: 0 30px 70px -30px rgba(0, 0, 0, .8);
  position: relative; overflow: hidden;
}
.price-card::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
}
.price-head { text-align: center; padding-bottom: 26px; border-bottom: 1px solid var(--line); }
.price-name { font-size: 14px; color: var(--text-2); font-family: var(--mono); letter-spacing: .02em; }
.price-figure { display: flex; align-items: baseline; justify-content: center; gap: 14px; margin: 16px 0 10px; }
.price-anchor { font-size: 26px; color: var(--text-3); text-decoration: line-through; }
.price-now { font-size: 64px; font-weight: 900; letter-spacing: -0.04em; }
.price-now::before { content: "£"; font-size: .5em; vertical-align: super; font-weight: 700; margin-right: 2px; }
.price-founder { font-size: 13px; color: var(--text-3); max-width: 44ch; margin: 0 auto; }
.price-includes { list-style: none; display: grid; gap: 13px; margin: 26px 0; }
.price-includes li { display: flex; gap: 12px; font-size: 15px; color: var(--text-2); }
.price-includes li span { color: var(--ok); font-weight: 700; flex: none; }
.price-sub { text-align: center; font-size: 12.5px; color: var(--text-3); margin-top: 16px; }
.anchor-note { margin-top: 24px; font-size: 13.5px; color: var(--text-3); text-align: center; max-width: 62ch; margin-left: auto; margin-right: auto; }

/* GUARANTEE */
.guarantee {
  display: flex; gap: 28px; align-items: center;
  background: var(--surface); border: 1px solid var(--line-2); border-radius: var(--r-lg); padding: 34px;
}
.guarantee-badge {
  flex: none; width: 96px; height: 96px; border-radius: 50%; display: grid; place-items: center;
  font-family: var(--mono); font-size: 30px; font-weight: 700; color: var(--accent); line-height: 1;
  border: 2px dashed color-mix(in srgb, var(--accent) 50%, transparent); background: var(--accent-soft);
}
.guarantee-badge span { font-size: 12px; letter-spacing: .15em; color: var(--text-2); margin-top: 4px; }
.guarantee h3 { font-size: 22px; margin-bottom: 10px; }
.guarantee p { font-size: 15px; color: var(--text-2); }
.guarantee-fine { font-size: 12.5px; color: var(--text-3); margin-top: 12px; }

/* FAQ */
.faq { margin-top: 36px; display: grid; gap: 10px; }
.faq details {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--r);
  padding: 4px 22px; transition: .16s var(--ease);
}
.faq details[open] { border-color: var(--line-2); background: var(--surface-2); }
.faq summary {
  cursor: pointer; list-style: none; padding: 18px 0; font-weight: 600; font-size: 16px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--accent); font-size: 22px; font-weight: 400; transition: .2s var(--ease); flex: none; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { font-size: 14.5px; color: var(--text-2); padding-bottom: 20px; max-width: 64ch; }
.faq code { font-family: var(--mono); font-size: .9em; background: var(--bg); padding: 2px 6px; border-radius: 5px; color: var(--accent); }

/* FINAL CTA */
.final-cta { text-align: center; }
.final-cta h2 { margin: 0 auto; }
.final-cta .section-lede { margin: 18px auto 32px; }
.final-cta .cta-note { display: block; margin-top: 16px; font-size: 13px; color: var(--text-3); }

/* FOOTER */
.site-footer { border-top: 1px solid var(--line); padding: 50px 0 44px; background: var(--bg-2); }
.footer-disc h4 { font-size: 12.5px; text-transform: uppercase; letter-spacing: .1em; color: var(--text-3); margin-bottom: 14px; }
.footer-disc p { font-size: 12.5px; color: var(--text-3); line-height: 1.6; margin-bottom: 11px; max-width: 90ch; }
.footer-disc strong { color: var(--text-2); }
.footer-legal { margin-top: 26px; padding-top: 22px; border-top: 1px solid var(--line); font-size: 12px; color: var(--text-3); }

/* ───────────────────────── RESPONSIVE ───────────────────────── */
@media (max-width: 860px) {
  .pain-grid, .mech-grid { grid-template-columns: 1fr; }
  .inside-grid { grid-template-columns: 1fr; }
  .inside-feature { position: static; }
}
@media (max-width: 560px) {
  .wrap { padding: 0 18px; }
  .hero { padding: 64px 0 60px; }
  .section { padding: 60px 0; }
  .guarantee { flex-direction: column; text-align: center; gap: 20px; }
  .nav-cta { font-size: 13px; padding: 8px 13px; }
  .price-now { font-size: 52px; }
  .price-card { padding: 28px 22px; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; scroll-behavior: auto; }
}