:root {
  --bg: #050806;
  --panel: #0b120d;
  --panel-soft: #101a13;
  --text: #f4fff6;
  --muted: #a8b8aa;
  --line: rgba(157, 255, 61, 0.18);
  --green: #8ee12f;
  --green-2: #62b91e;
  --gold: #ffd95a;
  --danger: #ff6f61;
  --radius: 28px;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.5);
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 14% 10%, rgba(142, 225, 47, 0.2), transparent 28rem),
    radial-gradient(circle at 82% 18%, rgba(98, 185, 30, 0.16), transparent 30rem),
    linear-gradient(145deg, #020302 0%, #071108 54%, #030503 100%);
  color: var(--text);
  min-height: 100vh;
}

a {
  color: var(--green);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px clamp(20px, 5vw, 72px);
  background: rgba(5, 8, 6, 0.82);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  font-weight: 800;
  letter-spacing: -0.04em;
  font-size: 1.3rem;
}

.brand-mark {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: #020402;
  border: 1px solid rgba(142, 225, 47, 0.42);
  display: grid;
  place-items: center;
  box-shadow: inset 0 0 22px rgba(142, 225, 47, 0.12);
}

.mini-cube {
  width: 18px;
  height: 18px;
  border-radius: 5px;
  background: linear-gradient(145deg, #aaf342, #5fac1e);
  transform: rotate(45deg) skew(-10deg, -10deg);
}

.nav {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.nav a {
  color: var(--muted);
  font-size: 0.95rem;
}

.nav a:hover {
  color: var(--text);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(280px, 0.92fr);
  gap: clamp(28px, 6vw, 72px);
  align-items: center;
  padding: clamp(52px, 8vw, 104px) clamp(20px, 5vw, 72px);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--green);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.76rem;
  font-weight: 800;
}

.eyebrow::before {
  content: "";
  width: 28px;
  height: 2px;
  background: var(--green);
  border-radius: 99px;
}

h1,
h2,
h3 {
  letter-spacing: -0.055em;
  line-height: 0.95;
  margin: 0;
}

h1 {
  margin-top: 18px;
  max-width: 840px;
  font-size: clamp(3.1rem, 9vw, 7.8rem);
}

h2 {
  font-size: clamp(2rem, 4.5vw, 4.2rem);
}

h3 {
  font-size: 1.35rem;
}

p {
  color: var(--muted);
  line-height: 1.72;
}

.lead {
  max-width: 720px;
  font-size: clamp(1.08rem, 2vw, 1.32rem);
}

.actions {
  display: flex;
  gap: 14px;
  margin-top: 30px;
  flex-wrap: wrap;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.035);
  color: var(--text);
  font-weight: 800;
}

.button.primary {
  background: linear-gradient(135deg, var(--green), var(--green-2));
  color: #081006;
  box-shadow: 0 18px 44px rgba(142, 225, 47, 0.28);
}

.hero-card {
  min-height: 420px;
  border-radius: 42px;
  border: 1px solid rgba(142, 225, 47, 0.2);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.05), transparent),
    #010201;
  display: grid;
  place-items: center;
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}

.hero-card::before {
  content: "";
  position: absolute;
  inset: 10%;
  background: radial-gradient(circle, rgba(142, 225, 47, 0.18), transparent 56%);
  filter: blur(20px);
}

.cube {
  position: relative;
  width: 190px;
  height: 190px;
  transform-style: preserve-3d;
  transform: rotateX(-28deg) rotateY(44deg);
  animation: floatCube 5.5s ease-in-out infinite;
}

.cube span {
  position: absolute;
  inset: 0;
  border-radius: 26px;
  background: linear-gradient(145deg, #a7ef3c, #68ba22);
  box-shadow: inset -22px -24px 40px rgba(0, 0, 0, 0.16), inset 18px 18px 30px rgba(255, 255, 255, 0.14);
}

.cube .front {
  transform: translateZ(95px);
}

.cube .right {
  transform: rotateY(90deg) translateZ(95px);
  filter: brightness(0.82);
}

.cube .top {
  transform: rotateX(90deg) translateZ(95px);
  filter: brightness(1.12);
}

@keyframes floatCube {
  0%, 100% { transform: rotateX(-28deg) rotateY(44deg) translateY(0); }
  50% { transform: rotateX(-28deg) rotateY(44deg) translateY(-16px); }
}

.section {
  padding: clamp(44px, 7vw, 90px) clamp(20px, 5vw, 72px);
}

.section-title {
  max-width: 820px;
  margin-bottom: 30px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.two-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0.018));
  padding: 26px;
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.24);
}

.card strong,
.highlight {
  color: var(--text);
}

.plan {
  border-radius: 34px;
  padding: 30px;
  border: 1px solid var(--line);
  background: var(--panel);
}

.plan.premium {
  border-color: rgba(255, 217, 90, 0.38);
  background:
    radial-gradient(circle at 20% 0%, rgba(255, 217, 90, 0.13), transparent 16rem),
    var(--panel);
}

.price {
  color: var(--green);
  font-size: 2.1rem;
  font-weight: 900;
  letter-spacing: -0.05em;
}

.premium .price {
  color: var(--gold);
}

.list {
  padding-left: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.list li {
  color: var(--muted);
  line-height: 1.55;
}

.list li::before {
  content: "•";
  color: var(--green);
  font-weight: 900;
  margin-right: 10px;
}

.content-page {
  width: min(980px, calc(100% - 40px));
  margin: 0 auto;
  padding: clamp(42px, 7vw, 88px) 0;
}

.content-page h1 {
  font-size: clamp(2.7rem, 7vw, 5rem);
}

.content-page h2 {
  margin-top: 42px;
  font-size: clamp(1.7rem, 3.2vw, 2.6rem);
}

.notice {
  border-left: 4px solid var(--green);
  background: rgba(142, 225, 47, 0.08);
  padding: 18px 20px;
  border-radius: 18px;
}

.site-footer {
  display: grid;
  gap: 18px;
  padding: 34px clamp(20px, 5vw, 72px);
  border-top: 1px solid var(--line);
  color: var(--muted);
  background: rgba(0, 0, 0, 0.28);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.small {
  font-size: 0.92rem;
}

@media (max-width: 860px) {
  .site-header {
    align-items: flex-start;
    gap: 14px;
    flex-direction: column;
  }

  .nav {
    justify-content: flex-start;
  }

  .hero,
  .grid,
  .two-grid {
    grid-template-columns: 1fr;
  }

  .hero-card {
    min-height: 320px;
  }

  .cube {
    width: 140px;
    height: 140px;
  }

  .cube .front {
    transform: translateZ(70px);
  }

  .cube .right {
    transform: rotateY(90deg) translateZ(70px);
  }

  .cube .top {
    transform: rotateX(90deg) translateZ(70px);
  }
}