:root {
  --bg: #08111f;
  --bg-soft: #111b31;
  --panel: rgba(14, 24, 45, 0.78);
  --panel-strong: rgba(20, 33, 58, 0.95);
  --text: #eef3ff;
  --muted: #aeb9d6;
  --line: rgba(255, 255, 255, 0.09);
  --accent: #6ee7ff;
  --accent-2: #7c8cff;
  --accent-3: #ffd166;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(124, 140, 255, 0.24), transparent 26%),
    radial-gradient(circle at top right, rgba(110, 231, 255, 0.18), transparent 22%),
    radial-gradient(circle at bottom, rgba(255, 209, 102, 0.08), transparent 30%),
    linear-gradient(180deg, #050914 0%, var(--bg) 100%);
  font-family: "Trebuchet MS", "Verdana", sans-serif;
  min-height: 100vh;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.8), transparent 92%);
  opacity: 0.45;
}

a {
  color: inherit;
  text-decoration: none;
}

main {
  width: min(1140px, calc(100% - 32px));
  margin: 0 auto;
  padding: 24px 0 56px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(18px);
  background: linear-gradient(180deg, rgba(5, 9, 20, 0.9), rgba(5, 9, 20, 0.55));
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.menu {
  width: min(1140px, calc(100% - 32px));
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 0;
}

.brand {
  font-weight: 800;
  letter-spacing: 0.22em;
  font-size: 0.9rem;
  color: var(--accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
}

.nav-links a,
.menu a {
  transition: transform 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.nav-links a {
  padding: 11px 15px;
  border: 1px solid transparent;
  border-radius: 999px;
  color: var(--muted);
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--text);
  border-color: rgba(110, 231, 255, 0.22);
  background: rgba(255, 255, 255, 0.04);
  transform: translateY(-1px);
}

.user-box {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--text);
  white-space: nowrap;
}

.user-label {
  color: var(--muted);
}

.hero,
.section,
.cta {
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  background: var(--panel);
  backdrop-filter: blur(16px);
}

.hero {
  position: relative;
  overflow: hidden;
  display: grid;
  grid-template-columns: 1.4fr 0.9fr;
  gap: 24px;
  padding: 34px;
  border-radius: var(--radius-xl);
  margin-top: 24px;
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto -40px -40px auto;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(110, 231, 255, 0.28), transparent 70%);
  filter: blur(6px);
}

.hero-content,
.hero-panel,
.section-heading,
.info-box,
.cta {
  position: relative;
  z-index: 1;
}

.eyebrow {
  margin: 0 0 14px;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  font-size: 0.78rem;
  color: var(--accent);
  font-weight: 700;
}

.hero h1,
.section h2,
.cta h2 {
  margin: 0;
  line-height: 1.05;
  font-family: "Georgia", "Times New Roman", serif;
}

.hero h1 {
  font-size: clamp(2.4rem, 5vw, 4.8rem);
  max-width: 12ch;
}

.hero-text,
.section-heading p,
.info-box p,
.card p,
.panel-list strong {
  color: var(--muted);
}

.hero-text {
  max-width: 62ch;
  margin: 18px 0 0;
  font-size: 1.55rem;
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
  border-radius: 999px;
  font-weight: 700;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-2px);
}

.btn-primary {
  color: #06111f;
  background: linear-gradient(135deg, var(--accent), #d8fbff);
  box-shadow: 0 14px 30px rgba(110, 231, 255, 0.22);
}

.btn-secondary {
  color: var(--text);
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.04);
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 28px;
}

.stat-card {
  padding: 18px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.stat-value {
  display: block;
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--accent-3);
}

.stat-label {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  line-height: 1.4;
}

.hero-panel {
  display: flex;
  align-items: stretch;
}

.panel-card,
.card,
.info-box {
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: var(--panel-strong);
}

.panel-card {
  width: 100%;
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.panel-title {
  margin: 0 0 14px;
  font-size: 1.05rem;
  font-weight: 800;
}

.panel-badge {
  display: inline-flex;
  width: fit-content;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(110, 231, 255, 0.12);
  color: var(--accent);
  border: 1px solid rgba(110, 231, 255, 0.18);
}

.panel-list {
  display: grid;
  gap: 14px;
  margin-top: 22px;
}

.panel-list div {
  padding: 16px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.panel-list span {
  display: block;
  margin-bottom: 6px;
  color: var(--accent-3);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
}

.panel-list strong {
  font-size: 1rem;
  line-height: 1.5;
}

.section {
  padding: 30px;
  border-radius: var(--radius-xl);
  margin-top: 22px;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 22px;
}

.section-heading h2,
.info-box h2,
.cta h2 {
  font-size: clamp(1.8rem, 3vw, 2.8rem);
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.card {
  padding: 22px;
  transition: transform 0.22s ease, border-color 0.22s ease, background 0.22s ease;
}

.card:hover {
  transform: translateY(-6px);
  border-color: rgba(110, 231, 255, 0.24);
  background: rgba(25, 39, 71, 0.98);
}

.card-tag {
  display: inline-flex;
  margin-bottom: 14px;
  padding: 8px 11px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--accent-3);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.card h3,
.info-box h2 {
  margin: 0 0 12px;
  font-family: "Georgia", "Times New Roman", serif;
}

.card p {
  margin: 0;
  line-height: 1.7;
}

.split {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.info-box {
  padding: 24px;
}

.info-box.accent {
  background:
    linear-gradient(180deg, rgba(110, 231, 255, 0.12), rgba(20, 33, 58, 0.95)),
    var(--panel-strong);
}

.check-list {
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.check-list li {
  position: relative;
  padding-left: 26px;
  color: var(--text);
  line-height: 1.5;
}

.check-list li::before {
  content: "•";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--accent);
  font-size: 1.2rem;
  line-height: 1;
}

.cta {
  margin-top: 22px;
  border-radius: var(--radius-xl);
  padding: 24px 30px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.footer {
  width: min(1140px, calc(100% - 32px));
  margin: 18px auto 30px;
  text-align: center;
  color: var(--muted);
  padding: 16px 0 0;
}

@media (max-width: 900px) {
  .hero,
  .split,
  .cards,
  .stats,
  .cta {
    grid-template-columns: 1fr;
  }

  .hero,
  .section {
    padding: 22px;
  }

  .cta {
    flex-direction: column;
    align-items: flex-start;
  }

  .menu {
    flex-direction: column;
    align-items: stretch;
  }

  .brand {
    text-align: center;
  }

  .nav-links {
    justify-content: center;
  }

  .user-box {
    justify-content: center;
  }
}

@media (max-width: 640px) {
  main {
    width: min(100% - 20px, 1140px);
    padding-top: 16px;
  }

  .menu {
    width: min(100% - 20px, 1140px);
    gap: 12px;
  }

  .hero h1 {
    max-width: none;
  }

  .hero-actions,
  .nav-links {
    width: 100%;
  }

  .btn,
  .nav-links a,
  .user-box {
    width: 100%;
  }

  .hero-actions {
    flex-direction: column;
  }

  .stats {
    gap: 10px;
  }

  .section-heading h2,
  .info-box h2,
  .cta h2 {
    font-size: 1.8rem;
  }
}

:root {
  color-scheme: dark;
  --bg: #071018;
  --panel: rgba(10, 14, 24, 0.92);
  --text: #f4f7fb;
  --muted: rgba(244, 247, 251, 0.72);
  --line: rgba(255, 255, 255, 0.12);
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.5);
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background:
    radial-gradient(
      circle at top left,
      rgba(255, 88, 169, 0.16),
      transparent 24%
    ),
    radial-gradient(
      circle at top right,
      rgba(82, 186, 255, 0.14),
      transparent 28%
    ),
    radial-gradient(
      circle at bottom,
      rgba(255, 214, 102, 0.08),
      transparent 30%
    ),
    linear-gradient(180deg, #05101a 0%, var(--bg) 100%);
  color: var(--text);
}

.scene {
  min-height: 100vh;
  display: grid;
  place-items: center;
  gap: 18px;
  padding: 40px 16px;
  text-align: center;
}

.scene h1 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.5rem);
  letter-spacing: -0.03em;
}

.subtitle {
  margin: 0;
  max-width: 760px;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.6;
}

.demo-frame {
  width: min(720px, 100%);
  padding: 28px;
  border: 1px solid rgba(255, 255, 255, 0.78);
  background: rgba(0, 0, 0, 0.08);
}

.rainbow-block {
  --x: 50%;
  --y: 50%;
  --active: 0;
  position: relative;
  width: min(360px, 100%);
  margin: 0 auto;
  padding: 28px 26px 24px;
  border-radius: 20px;
  background: var(--panel);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: var(--shadow);
  overflow: hidden;
  text-align: left;
  isolation: isolate;
  transition:
    transform 180ms ease,
    border-color 180ms ease;
}

.rainbow-block[data-active='true'] {
  --active: 1;
  transform: translateY(-2px);
  border-color: rgba(255, 149, 0, 0.28);
}

.rainbow-block::before {
  content: '';
  position: absolute;
  inset: 0;
  padding: 2px;
  border-radius: inherit;
  background:
    radial-gradient(
      100px circle at var(--x) var(--y),
      rgba(255, 59, 48, 0.95),
      rgba(255, 149, 0, 0.84) 14%,
      rgba(255, 214, 10, 0.58) 24%,
      rgba(52, 199, 89, 0.42) 36%,
      rgba(10, 132, 255, 0.34) 48%,
      rgba(255, 45, 149, 0.3) 60%,
      rgba(165, 94, 234, 0.24) 72%,
      transparent 82%
    ),
    linear-gradient(
      120deg,
      #ff3cac,
      #784ba0,
      #2b86c5,
      #00d4ff,
      #7cff6b,
      #ffd95a,
      #ff3cac
    );
  background-size:
    100% 100%,
    240% 240%;
  background-position:
    0 0,
    0% 50%;
  opacity: calc(0.18 + (var(--active) * 0.82));
  filter: saturate(1.15) blur(0.2px);
  pointer-events: none;
  z-index: 0;
  -webkit-mask:
    linear-gradient(#000 0 0) content-box,
    linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  animation: borderFlow 7s linear infinite;
}

.rainbow-block::after {
  content: '';
  position: absolute;
  inset: -14px;
  background: conic-gradient(
    from 0deg at var(--x) var(--y),
    rgba(255, 59, 48, 0.45),
    rgba(255, 149, 0, 0.42),
    rgba(255, 214, 10, 0.38),
    rgba(52, 199, 89, 0.38),
    rgba(10, 132, 255, 0.42),
    rgba(255, 45, 149, 0.42),
    rgba(165, 94, 234, 0.4),
    rgba(139, 90, 43, 0.32),
    rgba(255, 59, 48, 0.45)
  );
  opacity: var(--active);
  filter: blur(14px) saturate(1.35);
  pointer-events: none;
  z-index: 0;
}

.rainbow-block > * {
  position: relative;
  z-index: 1;
}

.card-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.82);
  background: rgba(255, 29, 255, 0.479);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.card-label::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: linear-gradient(135deg, #ff3cac, #00d4ff, #7cff6b);
  box-shadow: 0 0 16px rgba(255, 255, 255, 0.4);
}

.rainbow-block h2 {
  margin: 0 0 12px;
  font-size: 2rem;
  line-height: 1;
}

.rainbow-block p {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 0.98rem;
  line-height: 1.65;
}

.rainbow-block button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 120px;
  padding: 11px 18px;
  border: 0;
  border-radius: 999px;
  background: linear-gradient(135deg, #ffffff, #d9f7ff);
  color: #0b1220;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.24);
  transition:
    transform 160ms ease,
    box-shadow 160ms ease;
}

.rainbow-block button:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.3);
}

@keyframes borderFlow {
  0% {
    background-position:
      0 0,
      0% 50%;
  }
  100% {
    background-position:
      0 0,
      200% 50%;
  }
}

@media (max-width: 640px) {
  .scene {
    padding: 24px 12px;
  }

  .demo-frame {
    padding: 18px;
  }

  .rainbow-block {
    width: 100%;
    padding: 22px 18px 20px;
  }
}

.cool-btn {
  position: relative;
  padding: 15px 30px;
  color: white;
  background: #1a1a1a;
  border: none;
  border-radius: 10px;
  font-size: 18px;
  cursor: pointer;
  overflow: hidden;
  transition: transform 0.3s;
}

.cool-btn::before {
  content: "";
  position: absolute;
  inset: -3px;
  border-radius: 13px;
  background: #1a1a1a;
  z-index: -1;
}

.cool-btn:hover::before {
  background: linear-gradient(90deg, red, orange, yellow, green, cyan, blue, purple, red);
  animation: move-gradient 3s linear infinite;
}

.cool-btn:hover {
  transform: scale(1.05);
}

@keyframes move-gradient {
  0% {
    background-position: 0% 50%;
  }
  100% {
    background-position: 100% 50%;
  }
}