:root {
  --bg: #080b0d;
  --panel: #0d1215;
  --panel-bright: #11181c;
  --line: #202a2f;
  --line-bright: #354249;
  --text: #f1f3ed;
  --muted: #7f8b90;
  --accent: #cde955;
  --accent-dark: #91a73a;
  --hostile: #e65f55;
  --condensed: "Barlow Condensed", sans-serif;
  --mono: "IBM Plex Mono", monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-width: 320px; overflow-x: hidden; color: var(--text); background: var(--bg); font-family: var(--mono); }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
.page-grid { position: fixed; inset: 0; pointer-events: none; opacity: .24; background-image: linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px); background-size: 48px 48px; mask-image: linear-gradient(to bottom, #000, transparent 88%); }

.store-header { position: relative; z-index: 4; height: 84px; padding: 0 clamp(22px, 5vw, 76px); border-bottom: 1px solid var(--line); display: flex; align-items: center; justify-content: space-between; background: rgba(8,11,13,.9); backdrop-filter: blur(18px); }
.brand { display: flex; align-items: center; gap: 12px; }
.brand > span:last-child { display: grid; }
.brand strong { font-family: var(--condensed); font-size: 20px; letter-spacing: .16em; line-height: 1; }
.brand small { margin-top: 5px; color: var(--muted); font-size: 7px; letter-spacing: .18em; }
.brand-mark { width: 30px; height: 30px; border: 1px solid var(--line-bright); display: flex; align-items: flex-end; justify-content: center; gap: 2px; padding: 7px; transform: rotate(45deg); }
.brand-mark i { display: block; width: 3px; background: var(--accent); }
.brand-mark i:nth-child(1) { height: 7px; }
.brand-mark i:nth-child(2) { height: 13px; }
.brand-mark i:nth-child(3) { height: 10px; }
.store-header nav { display: flex; gap: 38px; color: var(--muted); font-size: 9px; letter-spacing: .14em; }
.store-header nav a:hover { color: var(--text); }
.header-action, .primary-action { min-height: 42px; display: inline-flex; align-items: center; justify-content: center; padding: 0 19px; background: var(--accent); color: #0a0d0e; font-size: 9px; font-weight: 600; letter-spacing: .1em; }
.header-action:hover, .primary-action:hover { background: #def467; }

main, footer { position: relative; z-index: 1; }
.hero { min-height: 620px; padding: 90px clamp(22px, 9vw, 140px) 104px; display: flex; align-items: center; overflow: hidden; }
.hero::before { content: "KNOWER"; position: absolute; top: 72px; left: 3vw; z-index: -1; color: rgba(255,255,255,.016); font-family: var(--condensed); font-size: clamp(160px, 24vw, 390px); font-weight: 700; letter-spacing: -.05em; line-height: 1; }
.eyebrow { color: var(--muted); font-size: 9px; font-weight: 600; letter-spacing: .17em; }
.eyebrow i { width: 6px; height: 6px; display: inline-block; margin-right: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 12px rgba(205,233,85,.7); }
.hero-copy { width: min(100%, 940px); }
.hero h1 { margin: 19px 0 22px; font-family: var(--condensed); font-size: clamp(76px, 10vw, 142px); font-weight: 600; letter-spacing: -.035em; line-height: .82; text-transform: uppercase; }
.hero h1 em { color: var(--accent); font-style: normal; }
.hero-copy > p { max-width: 560px; margin: 0; color: #a2adb0; font-size: 11px; line-height: 1.85; }
.hero-actions { margin-top: 35px; display: flex; align-items: center; gap: 26px; }
.primary-action { min-height: 48px; padding: 0 23px; }
.text-action { color: var(--muted); font-size: 9px; letter-spacing: .1em; }
.text-action span { margin-left: 8px; color: var(--accent); }

.trust-strip { min-height: 74px; padding: 0 clamp(22px, 7vw, 108px); border-block: 1px solid var(--line); display: grid; grid-template-columns: repeat(4, 1fr); align-items: center; color: var(--muted); font-size: 8px; letter-spacing: .13em; background: rgba(13,18,21,.72); }
.trust-strip span { text-align: center; border-right: 1px solid var(--line); }
.trust-strip span:last-child { border: 0; }
.trust-strip span::before { content: "+"; margin-right: 9px; color: var(--accent); }

.plans-section, .faq-section { padding: 108px clamp(22px, 7vw, 108px); }
.section-heading { margin-bottom: 45px; display: flex; justify-content: space-between; align-items: end; gap: 30px; }
.section-heading h2, .requirements-copy h2, .closing-section h2 { margin: 10px 0 0; font-family: var(--condensed); font-size: clamp(42px, 5vw, 68px); font-weight: 600; letter-spacing: -.02em; line-height: .95; text-transform: uppercase; }
.section-heading > p { max-width: 455px; margin: 0; color: var(--muted); font-size: 9px; line-height: 1.8; }
.plan-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.plan-card { position: relative; min-height: 500px; padding: 31px; border: 1px solid var(--line); display: flex; flex-direction: column; background: linear-gradient(160deg, rgba(17,24,28,.78), rgba(10,14,16,.92)); }
.plan-card:hover { border-color: var(--line-bright); transform: translateY(-3px); transition: .2s ease; }
.plan-card.featured { border-color: rgba(205,233,85,.55); box-shadow: inset 0 3px var(--accent); }
.recommended { position: absolute; top: 17px; right: 20px; color: var(--accent); font-size: 7px; letter-spacing: .14em; }
.plan-index { color: #344147; font-family: var(--condensed); font-size: 48px; font-weight: 600; line-height: 1; }
.plan-label { margin-top: 34px; color: var(--accent); font-size: 8px; letter-spacing: .15em; }
.plan-card h3 { margin: 8px 0 13px; font-family: var(--condensed); font-size: 48px; font-weight: 600; text-transform: uppercase; }
.plan-description { min-height: 50px; margin: 0; color: var(--muted); font-size: 9px; line-height: 1.7; }
.plan-card ul { margin: 23px 0 30px; padding: 22px 0 0; border-top: 1px solid var(--line); list-style: none; }
.plan-card li { margin: 12px 0; color: #a7b0b3; font-size: 8px; }
.plan-card li::before { content: "+"; margin-right: 10px; color: var(--accent); }
.plan-bottom { margin-top: auto; }
.plan-bottom strong { display: block; margin-bottom: 12px; color: var(--muted); font-size: 8px; letter-spacing: .14em; }
.plan-bottom button { width: 100%; min-height: 47px; border: 1px solid var(--line-bright); color: #667176; background: #0b0f11; font-size: 8px; letter-spacing: .1em; cursor: not-allowed; }
.featured .plan-bottom button { border-color: rgba(205,233,85,.25); color: #839144; }
.plan-bottom button:not(:disabled) { border-color: var(--accent); color: #0a0d0e; background: var(--accent); cursor: pointer; font-weight: 600; }
.plan-bottom button:not(:disabled):hover { background: #def467; }
.plan-bottom button.busy { color: var(--muted); border-color: var(--line-bright); background: #0b0f11; cursor: wait; }
.store-notice { margin: 17px 0 0; padding: 14px 16px; border: 1px solid var(--line); color: var(--muted); font-size: 8px; line-height: 1.6; }
.store-notice span { margin-right: 10px; color: var(--accent); }
.store-notice.error span { color: var(--hostile); }
.climate-note { margin: 10px 0 0; padding: 14px 16px; border: 1px solid rgba(205,233,85,.24); color: #a7b0b3; background: rgba(205,233,85,.035); font-size: 8px; line-height: 1.6; }
.climate-note span { margin-right: 10px; color: var(--accent); font-weight: 600; letter-spacing: .12em; }

.purchase-result { margin-top: 18px; padding: clamp(28px, 5vw, 58px); border: 1px solid rgba(205,233,85,.45); background: radial-gradient(circle at 0 0, rgba(205,233,85,.08), transparent 38%), var(--panel); }
.purchase-result h2 { margin: 12px 0 10px; font-family: var(--condensed); font-size: clamp(34px, 5vw, 58px); font-weight: 600; line-height: 1; text-transform: uppercase; }
.purchase-result > p { max-width: 720px; margin: 0; color: var(--muted); font-size: 9px; line-height: 1.8; }
.key-delivery { margin-top: 28px; }
.key-delivery label { display: block; margin-bottom: 9px; color: var(--accent); font-size: 8px; letter-spacing: .14em; }
.key-delivery > div { display: grid; grid-template-columns: 1fr auto; }
.key-delivery input { min-width: 0; min-height: 50px; padding: 0 15px; border: 1px solid var(--line-bright); color: var(--text); background: #080b0d; font-family: var(--mono); font-size: 11px; outline: none; }
.key-delivery button { min-width: 120px; border: 0; color: #0a0d0e; background: var(--accent); font-size: 8px; font-weight: 600; letter-spacing: .1em; cursor: pointer; }
.key-delivery small { display: block; margin-top: 10px; color: var(--muted); font-size: 8px; }

.requirements-section { margin: 0 clamp(22px, 7vw, 108px); padding: 80px clamp(26px, 5vw, 70px); border: 1px solid var(--line); display: grid; grid-template-columns: .85fr 1.15fr; gap: 80px; background: linear-gradient(120deg, rgba(15,22,25,.95), rgba(9,13,15,.98)); }
.requirements-copy p { max-width: 470px; color: var(--muted); font-size: 9px; line-height: 1.85; }
.requirements-list article { padding: 22px 0; border-bottom: 1px solid var(--line); display: flex; gap: 19px; }
.requirements-list article:first-child { padding-top: 0; }
.requirements-list article:last-child { border: 0; }
.requirements-list article > span { color: var(--accent); font-family: var(--condensed); font-size: 20px; }
.requirements-list strong { font-size: 9px; letter-spacing: .1em; }
.requirements-list p { margin: 7px 0 0; color: var(--muted); font-size: 8px; line-height: 1.6; }

.faq-grid { border-top: 1px solid var(--line); }
.faq-grid details { border-bottom: 1px solid var(--line); }
.faq-grid summary { min-height: 68px; display: flex; align-items: center; justify-content: space-between; cursor: pointer; list-style: none; font-family: var(--condensed); font-size: 20px; letter-spacing: .02em; text-transform: uppercase; }
.faq-grid summary::-webkit-details-marker { display: none; }
.faq-grid summary span { color: var(--accent); font-family: var(--mono); font-size: 17px; font-weight: 400; }
.faq-grid details[open] summary span { transform: rotate(45deg); }
.faq-grid details p { max-width: 730px; margin: -3px 0 23px; color: var(--muted); font-size: 9px; line-height: 1.8; }

.closing-section { margin: 0 clamp(22px, 7vw, 108px) 100px; padding: 90px 30px; border: 1px solid var(--line); text-align: center; background: radial-gradient(circle at 50% 20%, rgba(205,233,85,.08), transparent 38%), #0c1114; }
.closing-section p { max-width: 620px; margin: 24px auto 31px; color: var(--muted); font-size: 9px; line-height: 1.8; }
footer { min-height: 120px; padding: 0 clamp(22px, 5vw, 76px); border-top: 1px solid var(--line); display: flex; align-items: center; justify-content: space-between; color: var(--muted); font-size: 8px; letter-spacing: .12em; }

@media (max-width: 980px) {
  .store-header nav { display: none; }
  .hero { padding-top: 70px; }
  .hero-copy { max-width: 700px; }
  .plan-grid { grid-template-columns: 1fr; }
  .plan-card { min-height: auto; }
  .requirements-section { grid-template-columns: 1fr; gap: 45px; }
}

@media (max-width: 640px) {
  .store-header { height: 72px; padding-inline: 17px; }
  .header-action { padding-inline: 12px; font-size: 7px; }
  .hero { min-height: auto; min-width: 0; padding: 58px 18px 70px; gap: 42px; }
  .hero-copy { min-width: 0; max-width: 100%; }
  .hero h1 { font-size: clamp(50px, 15vw, 58px); }
  .hero-actions { align-items: stretch; flex-direction: column; gap: 17px; }
  .text-action { text-align: center; }
  .trust-strip { padding: 18px; grid-template-columns: 1fr 1fr; gap: 20px 0; }
  .trust-strip span:nth-child(2) { border: 0; }
  .plans-section, .faq-section { padding: 76px 18px; }
  .section-heading { display: block; }
  .section-heading > p { margin-top: 18px; }
  .plan-card { padding: 25px; }
  .key-delivery > div { grid-template-columns: 1fr; gap: 8px; }
  .key-delivery button { min-height: 44px; }
  .requirements-section { margin-inline: 18px; padding: 50px 24px; }
  .closing-section { margin: 0 18px 70px; padding: 70px 22px; }
  footer { min-height: 150px; padding: 30px 18px; align-items: flex-start; flex-direction: column; gap: 24px; }
}

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }