:root {
  --bg: #050712;
  --bg-alt: #070a18;
  --accent: #5ee0ff;
  --accent-soft: rgba(94, 224, 255, 0.14);
  --accent-strong: #8bf9ff;
  --fg-main: #f5f7ff;
  --fg-muted: #a3acc7;
  --border-subtle: rgba(255, 255, 255, 0.06);
  --shadow-soft: 0 18px 40px rgba(0, 0, 0, 0.65);
  --radius-lg: 18px;
  --radius-pill: 999px;
  --max-width: 1040px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html,
body {
  background: radial-gradient(circle at top, #11152b 0, #050712 55%, #02030a 100%);
  color: var(--fg-main);
  font-family: -apple-system, BlinkMacSystemFont, system-ui, "Inter", "Segoe UI",
    sans-serif;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

/* Landing (index) */

.landing-body {
  display: flex;
  min-height: 100vh;
}

.landing-main {
  margin: auto;
  width: 100%;
  max-width: 520px;
  padding: 32px 18px;
}

.landing-card {
  border-radius: 28px;
  border: 1px solid var(--border-subtle);
  background:
    radial-gradient(circle at 10% -20%, rgba(94, 224, 255, 0.35), transparent 55%),
    radial-gradient(circle at 110% 120%, rgba(153, 103, 255, 0.3), transparent 55%),
    linear-gradient(145deg, rgba(9, 11, 30, 0.98), rgba(5, 7, 18, 0.96));
  box-shadow: var(--shadow-soft);
  padding: 26px 22px 24px;
}

.landing-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
}

.landing-title {
  font-size: 1.9rem;
  line-height: 1.2;
  margin-bottom: 12px;
}

.landing-subtitle {
  font-size: 0.95rem;
  color: var(--fg-muted);
  line-height: 1.6;
  margin-bottom: 18px;
}

.landing-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 16px;
}

.landing-note {
  font-size: 0.78rem;
  color: var(--fg-muted);
  line-height: 1.5;
}

/* Layout main */

main {
  flex: 1;
  width: 100%;
  display: flex;
  justify-content: center;
  padding: 24px 16px 64px;
}

.page-wrap {
  width: 100%;
  max-width: var(--max-width);
}

/* Top nav */

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 0 20px;
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  background: linear-gradient(
    to bottom,
    rgba(5, 7, 18, 0.94),
    rgba(5, 7, 18, 0.76),
    transparent
  );
}

.nav-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-orb {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 20%, #ffffff, #5ee0ff 40%, #11152b 75%);
  box-shadow: 0 0 16px rgba(94, 224, 255, 0.8);
}

.logo-text-main {
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.78rem;
  color: var(--accent-strong);
}

.logo-text-sub {
  font-size: 0.72rem;
  color: var(--fg-muted);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 0.82rem;
  color: var(--fg-muted);
}

.nav-links a {
  padding: 6px 0;
  position: relative;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width 0.2s ease-out;
}

.nav-links a:hover::after {
  width: 100%;
}

.nav-pill {
  border-radius: var(--radius-pill);
  border: 1px solid rgba(94, 224, 255, 0.35);
  padding: 6px 14px;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--accent-strong);
  display: flex;
  align-items: center;
  gap: 6px;
  background: radial-gradient(circle at top left, #14243c, transparent 55%);
}

.nav-pill span.dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #38ff9c;
  box-shadow: 0 0 8px rgba(56, 255, 156, 0.9);
}

/* Buttons */

.btn-primary,
.btn-secondary {
  border-radius: var(--radius-pill);
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 0.86rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.btn-primary {
  padding: 9px 18px;
  background: radial-gradient(circle at top left, #5ee0ff, #3781ff);
  color: #050712;
  font-weight: 600;
  box-shadow: 0 12px 30px rgba(21, 180, 255, 0.5);
}

.btn-secondary {
  padding: 9px 16px;
  background: rgba(9, 14, 40, 0.85);
  border: 1px solid rgba(160, 179, 255, 0.4);
  color: var(--fg-main);
  font-size: 0.82rem;
}

.btn-primary.large,
.btn-secondary.large {
  width: 46%;
}

/* Hero */

.hero {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2.2fr);
  gap: 36px;
  margin-top: 8px;
  padding: 24px 20px 26px;
  border-radius: 28px;
  border: 1px solid var(--border-subtle);
  background:
    radial-gradient(circle at 10% -20%, rgba(94, 224, 255, 0.35), transparent 55%),
    radial-gradient(circle at 110% 120%, rgba(153, 103, 255, 0.3), transparent 55%),
    linear-gradient(145deg, rgba(9, 11, 30, 0.98), rgba(5, 7, 18, 0.96));
  box-shadow: var(--shadow-soft);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 10% 0, rgba(255, 255, 255, 0.14), transparent 55%),
    radial-gradient(circle at 80% 120%, rgba(255, 255, 255, 0.06), transparent 65%);
  opacity: 0.55;
  mix-blend-mode: screen;
  pointer-events: none;
}

.hero-left,
.hero-right {
  position: relative;
  z-index: 1;
}

.hero-tagline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  background: rgba(5, 12, 35, 0.9);
  border: 1px solid rgba(94, 224, 255, 0.25);
  font-size: 0.72rem;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--accent-strong);
  margin-bottom: 14px;
}

.hero-tagline span.pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #38ff9c;
  box-shadow: 0 0 12px rgba(56, 255, 156, 1);
  animation: pulse 1.8s infinite ease-out;
}

@keyframes pulse {
  0% {
    transform: scale(1);
    opacity: 1;
  }
  100% {
    transform: scale(1.9);
    opacity: 0;
  }
}

.hero-title {
  font-size: clamp(2rem, 2.8vw, 2.6rem);
  line-height: 1.15;
  margin-bottom: 14px;
}

.hero-title .accent {
  background: linear-gradient(120deg, #5ee0ff, #9bf6ff, #ffffff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-subtitle {
  font-size: 0.97rem;
  color: var(--fg-muted);
  max-width: 34rem;
  line-height: 1.6;
  margin-bottom: 20px;
}

.hero-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-bottom: 18px;
}

.hero-meta {
  font-size: 0.78rem;
  color: var(--fg-muted);
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.hero-meta strong {
  color: var(--accent-strong);
  font-weight: 500;
}

/* Hero right card */

.hero-card {
  border-radius: 24px;
  padding: 18px 18px 20px;
  border: 1px solid rgba(255, 255, 255, 0.06);
  background:
    radial-gradient(circle at 20% 0, rgba(94, 224, 255, 0.3), transparent 50%),
    radial-gradient(circle at 110% 110%, rgba(116, 82, 255, 0.35), transparent 55%),
    linear-gradient(145deg, #060717, #050712);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.75);
  min-height: 220px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  overflow: hidden;
}

.hero-orbit {
  position: relative;
  height: 150px;
  margin-bottom: 14px;
}

.orbit-core {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 20%, #ffffff, #5ee0ff 40%, #141830 78%);
  box-shadow: 0 0 40px rgba(135, 236, 255, 0.95);
}

.orbit-ring {
  position: absolute;
  left: 50%;
  top: 50%;
  border-radius: 50%;
  border: 1px solid rgba(176, 211, 255, 0.28);
  transform: translate(-50%, -50%) rotate(-8deg);
}

.orbit-ring.r1 {
  width: 130px;
  height: 130px;
}

.orbit-ring.r2 {
  width: 170px;
  height: 170px;
  border-style: dashed;
  opacity: 0.6;
}

.orbit-ring.r3 {
  width: 210px;
  height: 210px;
  border-color: rgba(94, 224, 255, 0.3);
  opacity: 0.5;
}

.orbit-label {
  position: absolute;
  font-size: 0.7rem;
  color: var(--fg-muted);
  padding: 4px 7px;
  border-radius: var(--radius-pill);
  background: rgba(5, 10, 25, 0.9);
  border: 1px solid rgba(94, 224, 255, 0.3);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  white-space: nowrap;
}

.orbit-label.l1 {
  top: 6%;
  left: 10%;
}

.orbit-label.l2 {
  bottom: 12%;
  right: 10%;
}

.orbit-label.l3 {
  bottom: 8%;
  left: 15%;
}

.hero-card-tag {
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(184, 199, 255, 0.9);
  margin-bottom: 3px;
}

.hero-card-title {
  font-size: 0.92rem;
  font-weight: 500;
  margin-bottom: 4px;
}

.hero-card-text {
  font-size: 0.8rem;
  color: var(--fg-muted);
  line-height: 1.5;
}

/* Sections */

section {
  margin-top: 40px;
  padding: 0 8px;
}

section h2 {
  font-size: 1.32rem;
  margin-bottom: 10px;
}

section h2 span.en {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--accent-strong);
  display: block;
  margin-bottom: 4px;
}

section p {
  font-size: 0.9rem;
  color: var(--fg-muted);
  line-height: 1.7;
  margin-bottom: 10px;
}

.section-card {
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
  background: radial-gradient(circle at top, rgba(16, 28, 65, 0.85), #050712 65%);
  padding: 18px 18px 18px;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.6);
}

.section-dashed {
  border-style: dashed;
  border-color: rgba(94, 224, 255, 0.4);
}

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

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 9px;
  border-radius: var(--radius-pill);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border: 1px solid rgba(94, 224, 255, 0.35);
  color: var(--accent-strong);
  background: rgba(7, 14, 32, 0.95);
  margin-bottom: 10px;
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.subheading {
  font-size: 1.05rem;
  margin-bottom: 6px;
}

.feature-list {
  margin-left: 1.1rem;
  margin-top: 6px;
  margin-bottom: 10px;
  color: var(--fg-muted);
  font-size: 0.9rem;
}

.definition-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
  margin-top: 12px;
}

.definition-item {
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.05);
  background: rgba(5, 8, 20, 0.9);
  padding: 10px 11px 11px;
  font-size: 0.8rem;
}

.definition-item strong {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: rgba(173, 202, 255, 0.98);
  display: block;
  margin-bottom: 4px;
}

.definition-item p {
  font-size: 0.8rem;
  margin-bottom: 0;
  line-height: 1.5;
}

/* Table */

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
  margin-top: 8px;
}

.comparison-table th,
.comparison-table td {
  padding: 7px 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.comparison-table th {
  text-align: left;
  font-weight: 500;
  color: rgba(200, 211, 255, 0.95);
  background: rgba(10, 16, 40, 0.8);
}

.comparison-table td.label {
  color: rgba(163, 176, 211, 0.95);
  width: 32%;
}

.comparison-table td {
  color: var(--fg-muted);
}

/* Footer */

footer {
  width: 100%;
  padding: 18px 16px 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  background: radial-gradient(circle at bottom, #050712, #02030a);
  display: flex;
  justify-content: center;
}

.footer-inner {
  width: 100%;
  max-width: var(--max-width);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px;
  align-items: center;
  font-size: 0.78rem;
  color: var(--fg-muted);
}

.footer-inner a {
  color: var(--accent-strong);
  font-weight: 400;
}

.footer-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.footer-tag {
  padding: 3px 9px;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(7, 10, 25, 0.9);
  font-size: 0.72rem;
}

.small-muted {
  font-size: 0.82rem;
  color: var(--fg-muted);
}

/* Responsive */

@media (max-width: 880px) {
  .hero {
    grid-template-columns: minmax(0, 1fr);
  }
  .hero-right {
    order: -1;
  }
  .nav-links {
    display: none;
  }
}

@media (max-width: 600px) {
  main {
    padding-top: 18px;
  }
  .hero {
    padding: 18px 14px 18px;
    border-radius: 22px;
  }
  .section-card {
    padding: 14px 14px;
  }
  .dual-col {
    grid-template-columns: minmax(0, 1fr);
  }
  .comparison-table {
    font-size: 0.78rem;
  }
  .btn-primary.large,
  .btn-secondary.large {
    width: 100%;
  }
}