:root {
  color-scheme: light;
  --bg: #f7f9fc;
  --bg-2: #eef4ff;
  --surface: #ffffff;
  --line: #d9e2ef;
  --text: #101828;
  --muted: #526071;
  --cyan: #0b63ce;
  --magenta: #7a3ff2;
  --gold: #9a6500;
  --green: #087a55;
  --shadow: 0 14px 40px rgba(16, 24, 40, 0.1);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  padding-bottom: 92px;
  background: linear-gradient(180deg, #ffffff 0%, var(--bg) 55%, #ffffff 100%);
  color: var(--text);
}

a {
  color: inherit;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -5rem;
  z-index: 20;
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  background: var(--cyan);
  color: #ffffff;
  font-weight: 800;
}

.skip-link:focus {
  top: 1rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
  font-weight: 900;
  letter-spacing: 0;
}

.brand img {
  width: 2.35rem;
  height: 2.35rem;
  border-radius: 0.7rem;
  object-fit: cover;
  box-shadow: 0 8px 22px rgba(16, 24, 40, 0.12);
}

.nav {
  display: none;
  gap: 0.9rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.nav a {
  text-decoration: none;
}

.nav a:hover,
.nav a:focus {
  color: var(--cyan);
}

.page {
  overflow: hidden;
}

.hero {
  position: relative;
  min-height: calc(100svh - 4.25rem - 92px);
  display: grid;
  align-items: center;
  padding: 2rem 1rem 4.8rem;
}

.hero-inner,
.section-inner,
.article-layout,
.hub-grid {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
}

.hero-inner {
  display: grid;
  gap: 2rem;
}

.kicker {
  margin: 0 0 0.8rem;
  color: var(--cyan);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  letter-spacing: 0;
  line-height: 1.02;
}

h1 {
  max-width: 12ch;
  margin: 0;
  font-size: clamp(2.65rem, 12vw, 5.5rem);
}

.hero-copy {
  max-width: 42rem;
  margin: 1.1rem 0 0;
  color: var(--muted);
  font-size: clamp(1.02rem, 4vw, 1.25rem);
  line-height: 1.6;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.btn {
  display: inline-flex;
  min-height: 3rem;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--line);
  border-radius: 0.65rem;
  background: #ffffff;
  color: var(--text);
  text-decoration: none;
  font-weight: 850;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.btn.primary {
  border-color: transparent;
  background: var(--cyan);
  color: #ffffff;
  box-shadow: 0 10px 26px rgba(11, 99, 206, 0.22);
}

.btn:hover,
.btn:focus {
  transform: translateY(-2px);
  border-color: rgba(11, 99, 206, 0.42);
}

.game-visual {
  position: relative;
  min-height: 21rem;
  display: grid;
  place-items: center;
  isolation: isolate;
}

.pulse-arena {
  position: relative;
  width: min(76vw, 22rem);
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(11, 99, 206, 0.07) 0 30%, rgba(122, 63, 242, 0.07) 31% 52%, transparent 53%);
  box-shadow: inset 0 0 0 1px var(--line), 0 18px 50px rgba(16, 24, 40, 0.08);
  animation: floatIn 700ms ease both;
}

.pulse-arena::before,
.pulse-arena::after {
  content: "";
  position: absolute;
  inset: 13%;
  border-radius: 50%;
  border: 12px solid transparent;
  border-top-color: var(--cyan);
  border-right-color: var(--magenta);
  filter: none;
  animation: spin 7s linear infinite;
}

.pulse-arena::after {
  inset: 34%;
  border-width: 8px;
  border-top-color: var(--gold);
  border-right-color: transparent;
  border-left-color: var(--green);
  animation-duration: 3.8s;
  animation-direction: reverse;
}

.tap-core {
  position: absolute;
  inset: 43%;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 0 0 1px var(--line), 0 10px 24px rgba(16, 24, 40, 0.12);
}

.phone-shot {
  max-width: 8.75rem;
  margin-top: -1rem;
  border-radius: 1.6rem;
  box-shadow: var(--shadow);
}

.section {
  padding: 3.2rem 0;
}

.section.alt {
  background: #f3f7fc;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.section h2 {
  max-width: 14ch;
  margin: 0 0 1rem;
  font-size: clamp(2rem, 9vw, 4.6rem);
}

.lead {
  max-width: 48rem;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.7;
}

.feature-list,
.steps,
.article-list {
  display: grid;
  gap: 1rem;
  padding: 0;
  margin: 1.5rem 0 0;
  list-style: none;
}

.feature-list li,
.steps li,
.article-card {
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 0.7rem;
  background: var(--surface);
}

.feature-list strong,
.steps strong {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--text);
}

.feature-list span,
.steps span,
.article-card p {
  color: var(--muted);
  line-height: 1.55;
}

.article-card {
  display: block;
  text-decoration: none;
}

.article-card h3 {
  margin: 0 0 0.45rem;
  font-size: 1.18rem;
}

.article-card:hover,
.article-card:focus {
  border-color: rgba(11, 99, 206, 0.42);
  background: #f8fbff;
}

.article-directory {
  max-width: none;
}

.article-directory h1 {
  max-width: 13ch;
}

.article-grid {
  display: grid;
  gap: 1rem;
  margin-top: 1.6rem;
}

.guide-card {
  display: grid;
  gap: 0.8rem;
  min-height: 100%;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 0.8rem;
  background: var(--surface);
  text-decoration: none;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.guide-card:hover,
.guide-card:focus {
  transform: translateY(-3px);
  border-color: rgba(11, 99, 206, 0.42);
  background: #f8fbff;
}

.guide-card .tag {
  width: fit-content;
  padding: 0.28rem 0.52rem;
  border: 1px solid rgba(11, 99, 206, 0.22);
  border-radius: 999px;
  color: var(--cyan);
  font-size: 0.72rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.guide-card h2 {
  max-width: none;
  margin: 0;
  font-size: 1.22rem;
  line-height: 1.18;
}

.guide-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}

.guide-card .read-more {
  align-self: end;
  color: var(--gold);
  font-weight: 850;
}

.article-layout {
  padding: 2.2rem 0 4rem;
}

.breadcrumb {
  margin: 0 0 1.2rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.breadcrumb a {
  color: var(--cyan);
  text-decoration: none;
}

.article-layout article {
  max-width: 780px;
}

.article-layout h1 {
  max-width: 14ch;
  font-size: clamp(2.45rem, 12vw, 5.4rem);
}

.article-meta {
  margin: 1rem 0 2rem;
  color: var(--muted);
}

.article-layout h2 {
  margin: 2.1rem 0 0.75rem;
  font-size: clamp(1.55rem, 7vw, 2.4rem);
}

.article-layout p,
.article-layout li {
  color: var(--muted);
  font-size: 1.02rem;
  line-height: 1.78;
}

.article-layout ul,
.article-layout ol {
  padding-left: 1.25rem;
}

.seo-note {
  margin-top: 2rem;
  padding: 1rem;
  border-left: 4px solid var(--cyan);
  background: #eef6ff;
  color: var(--text);
}

.fixed-install {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 30;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.8rem;
  align-items: center;
  padding: 0.8rem 1rem calc(0.8rem + env(safe-area-inset-bottom));
  border-top: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(18px);
}

.fixed-install strong {
  display: block;
  font-size: 0.92rem;
}

.fixed-install span {
  display: block;
  color: var(--muted);
  font-size: 0.78rem;
}

.fixed-install .btn {
  min-height: 2.65rem;
  white-space: nowrap;
}

.site-footer {
  padding: 2rem 1rem 1rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.site-footer a {
  color: var(--cyan);
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@keyframes floatIn {
  from {
    opacity: 0;
    transform: translateY(18px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@media (min-width: 760px) {
  .nav {
    display: flex;
  }

  .hero {
    padding: 3rem 1.5rem 4.5rem;
  }

  .hero-inner {
    grid-template-columns: minmax(0, 1fr) minmax(22rem, 0.82fr);
    align-items: center;
  }

  .feature-list,
  .steps,
  .article-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .article-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .article-list {
    grid-template-columns: 1fr;
  }

  .fixed-install {
    left: 50%;
    right: auto;
    bottom: 1rem;
    width: min(720px, calc(100% - 2rem));
    transform: translateX(-50%);
    border: 1px solid var(--line);
    border-radius: 0.9rem;
    box-shadow: var(--shadow);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 1ms !important;
    scroll-behavior: auto !important;
    transition-duration: 1ms !important;
  }
}