:root {
  --bg: #0B1020;
  --card: #141B34;
  --primary: #6C63FF;
  --accent: #00D9FF;
  --glow: #A855F7;
  --text: #FFFFFF;
  --muted: #AAB5D6;
  --line: rgba(255, 255, 255, 0.12);
  --glass: rgba(20, 27, 52, 0.68);
  --radius: 8px;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.38);
  --container: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 20% 10%, rgba(108, 99, 255, 0.2), transparent 28rem),
    radial-gradient(circle at 85% 20%, rgba(0, 217, 255, 0.14), transparent 24rem),
    var(--bg);
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
button, input { font: inherit; }
img, svg { max-width: 100%; display: block; }
.container { width: min(calc(100% - 32px), var(--container)); margin-inline: auto; }
.section-pad { padding: 96px 0; position: relative; }
.section-pad-sm { padding: 56px 0; position: relative; }
.eyebrow {
  margin: 0 0 14px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}
.section-heading { max-width: 680px; margin-bottom: 40px; }
.section-heading h2, .hero-copy h1, .cta-banner h2 {
  margin: 0;
  line-height: 1.02;
  font-weight: 900;
}
.section-heading h2 { font-size: clamp(2rem, 6vw, 3.8rem); }
.section-heading p:not(.eyebrow), .hero-subtitle, .cta-banner p {
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.7;
}

.loader {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: grid;
  place-items: center;
  background: var(--bg);
  transition: opacity 0.45s ease, visibility 0.45s ease;
}
.loader.is-hidden { opacity: 0; visibility: hidden; }
.loader-mark { font-weight: 900; font-size: clamp(2rem, 7vw, 5rem); }
.loader span {
  position: absolute;
  width: 180px;
  height: 2px;
  margin-top: 96px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  animation: loadPulse 1s linear infinite;
}
@keyframes loadPulse { to { transform: rotate(360deg); } }

.scroll-progress {
  position: fixed;
  z-index: 999;
  inset: 0 auto auto 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent), var(--glow));
}
.cursor-glow {
  position: fixed;
  z-index: 2;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  pointer-events: none;
  background: radial-gradient(circle, rgba(0, 217, 255, 0.15), transparent 62%);
  transform: translate(-50%, -50%);
  mix-blend-mode: screen;
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  transition: background 0.3s ease, border-color 0.3s ease, backdrop-filter 0.3s ease;
  border-bottom: 1px solid transparent;
}
.site-header.scrolled {
  background: rgba(11, 16, 32, 0.72);
  border-color: var(--line);
  backdrop-filter: blur(18px);
}
.navbar { height: 78px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-size: 1.1rem; font-weight: 900; }
.brand-icon {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--primary), var(--accent));
  box-shadow: 0 0 28px rgba(108, 99, 255, 0.45);
}
.nav-menu { display: flex; align-items: center; gap: 28px; }
.nav-menu > a:not(.btn), .nav-login { position: relative; color: var(--muted); font-weight: 700; font-size: 0.94rem; }
.nav-menu > a:not(.btn)::after, .nav-login::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -8px;
  width: 100%;
  height: 2px;
  transform: scaleX(0);
  transform-origin: right;
  background: var(--accent);
  transition: transform 0.25s ease;
}
.nav-menu > a:hover::after, .nav-login:hover::after { transform: scaleX(1); transform-origin: left; }
.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
}

.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  min-height: 52px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  color: var(--text);
  font-weight: 800;
  cursor: pointer;
  overflow: hidden;
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--glow));
  box-shadow: 0 0 32px rgba(168, 85, 247, 0.28);
}
.btn-ghost { background: rgba(255, 255, 255, 0.06); border-color: var(--line); backdrop-filter: blur(14px); }
.btn-small { min-height: 42px; padding: 0 16px; font-size: 0.9rem; }
.pulse-btn { animation: softPulse 2.5s ease-in-out infinite; }
@keyframes softPulse { 50% { box-shadow: 0 0 42px rgba(0, 217, 255, 0.34); } }
.ripple-dot {
  position: absolute;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255,255,255,0.42);
  transform: translate(-50%, -50%) scale(1);
  pointer-events: none;
  animation: ripple 0.6s ease-out forwards;
}
@keyframes ripple { to { opacity: 0; transform: translate(-50%, -50%) scale(24); } }

.hero { min-height: 100svh; display: flex; align-items: center; padding-top: 124px; overflow: hidden; }
.hero-bg, .auth-bg { position: absolute; inset: 0; pointer-events: none; overflow: hidden; }
.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(16px);
  opacity: 0.45;
}
.orb-one { width: 360px; height: 360px; right: 12%; top: 12%; background: rgba(108, 99, 255, 0.24); }
.orb-two { width: 260px; height: 260px; left: -80px; bottom: 18%; background: rgba(0, 217, 255, 0.16); }
.grid-lines, .moving-grid {
  position: absolute;
  inset: 0;
  opacity: 0.24;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: linear-gradient(to bottom, rgba(0,0,0,0.8), transparent 75%);
}
.hero-grid { display: grid; grid-template-columns: 0.95fr 1.05fr; gap: 54px; align-items: center; }
.hero-copy h1 { font-size: clamp(3rem, 8vw, 6.7rem); max-width: 760px; }
.hero-subtitle { max-width: 560px; margin: 24px 0 32px; font-size: clamp(1.1rem, 2vw, 1.35rem); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }
.hero-trust { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 28px; color: var(--muted); font-weight: 700; }
.hero-trust span { display: inline-flex; align-items: center; gap: 8px; }
.hero-trust i { color: var(--accent); }

.hero-visual {
  position: relative;
  min-height: 620px;
  border-radius: 8px;
  isolation: isolate;
}
.particle-field { position: absolute; inset: 0; }
.particle-field span {
  position: absolute;
  width: 4px;
  height: 4px;
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 0 18px var(--accent);
  opacity: 0.7;
}
.visual-ring {
  position: absolute;
  inset: 12% 8%;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0,217,255,0.08), transparent 58%);
}
.ring-two { inset: 22% 18%; border-color: rgba(168, 85, 247, 0.22); }
.float-card, .category-card, .step-card, .mega-card, .daily-card, .leaderboard-card, .testimonial-card, .faq-item, .cta-banner {
  background: linear-gradient(145deg, rgba(20, 27, 52, 0.88), rgba(20, 27, 52, 0.46));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}
.float-card { position: absolute; padding: 18px; }
.card-a { width: 250px; left: 4%; top: 16%; }
.card-top { display: flex; justify-content: space-between; gap: 16px; font-weight: 800; }
.mini-progress { height: 8px; margin: 18px 0 12px; overflow: hidden; border-radius: 999px; background: rgba(255,255,255,0.1); }
.mini-progress span { display: block; height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--primary), var(--accent)); }
.float-card p, .float-card span { color: var(--muted); }
.trophy-card { right: 8%; top: 10%; display: grid; place-items: center; width: 168px; min-height: 170px; text-align: center; }
.trophy-card i { color: #FFD166; font-size: 2.6rem; }
.trophy-card strong { font-size: 2rem; }
.timer-card { right: 14%; bottom: 22%; }
.timer-card strong { display: block; margin-top: 8px; color: var(--accent); font-size: 1.45rem; }
.board-card { left: 14%; bottom: 10%; width: min(310px, 78vw); display: grid; gap: 12px; }
.board-card div { display: flex; justify-content: space-between; gap: 12px; color: var(--muted); }
.board-card b { color: var(--text); }
.coin, .question-bubble {
  position: absolute;
  display: grid;
  place-items: center;
  border-radius: 50%;
  font-weight: 900;
  background: linear-gradient(135deg, var(--accent), var(--primary));
  box-shadow: 0 0 30px rgba(0, 217, 255, 0.25);
}
.coin-one { width: 62px; height: 62px; left: 54%; top: 42%; }
.coin-two { width: 76px; height: 76px; left: 28%; top: 56%; }
.question-bubble { width: 92px; height: 92px; right: 34%; bottom: 4%; font-size: 2.4rem; background: linear-gradient(135deg, var(--glow), var(--primary)); }

.stats-grid, .category-grid, .quiz-grid, .testimonial-grid {
  display: grid;
  gap: 18px;
}
.stats-grid { grid-template-columns: repeat(4, 1fr); }
.stat-card { padding: 28px; border-bottom: 1px solid var(--line); background: rgba(255,255,255,0.03); }
.stat-card span { display: block; font-size: clamp(2rem, 4vw, 3.2rem); font-weight: 900; color: var(--accent); }
.stat-card p { margin: 8px 0 0; color: var(--muted); font-weight: 700; }
.category-grid { grid-template-columns: repeat(3, 1fr); }
.category-card { position: relative; padding: 28px; min-height: 210px; overflow: hidden; transition: transform 0.25s ease, border-color 0.25s ease; }
.category-card::before, .mega-card::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, transparent, var(--accent), var(--glow), transparent);
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.25s ease;
}
.category-card:hover::before, .mega-card:hover::before { opacity: 1; }
.category-card i { font-size: 2.4rem; color: var(--accent); }
.category-card h3 { margin: 24px 0 8px; font-size: 1.45rem; }
.category-card p { margin: 0; color: var(--muted); }
.badge {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 10px;
  margin-top: 18px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 900;
}
.easy { background: rgba(0,217,255,0.13); color: var(--accent); }
.medium { background: rgba(108,99,255,0.18); color: #BDB9FF; }
.hard, .live { background: rgba(168,85,247,0.18); color: #D9B6FF; }

.how { background: linear-gradient(180deg, rgba(255,255,255,0.02), transparent); }
.steps { position: relative; display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.steps::before {
  content: "";
  position: absolute;
  left: 12%;
  right: 12%;
  top: 54px;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent), var(--glow));
  opacity: 0.5;
}
.step-card { position: relative; padding: 30px; z-index: 1; }
.step-card span { color: var(--accent); font-weight: 900; }
.step-card i { display: grid; place-items: center; width: 56px; height: 56px; margin: 18px 0; border-radius: var(--radius); background: rgba(255,255,255,0.07); color: var(--accent); font-size: 1.4rem; }
.step-card p { color: var(--muted); line-height: 1.6; }

.mega-card { position: relative; display: grid; grid-template-columns: 0.8fr 1.2fr; gap: 32px; padding: 32px; overflow: hidden; }
.mega-prize { display: grid; place-items: center; text-align: center; min-height: 340px; background: rgba(255,255,255,0.04); border-radius: var(--radius); border: 1px solid var(--line); }
.prize-visual { display: grid; place-items: center; width: 154px; height: 154px; margin-bottom: 18px; border-radius: 50%; background: radial-gradient(circle, rgba(255,209,102,0.2), rgba(108,99,255,0.18)); }
.prize-visual i { font-size: 4.5rem; color: #FFD166; }
.mega-prize strong { font-size: clamp(2.4rem, 6vw, 4.7rem); }
.mega-content { align-self: center; }
.mega-content h3 { margin: 16px 0; font-size: clamp(2rem, 4vw, 3.4rem); line-height: 1.08; }
.mega-content p { color: var(--muted); line-height: 1.7; }
.event-meta { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin: 26px 0; }
.event-meta div { padding: 16px; border: 1px solid var(--line); border-radius: var(--radius); background: rgba(255,255,255,0.04); }
.event-meta span { display: block; margin-bottom: 8px; color: var(--muted); font-size: 0.82rem; }
.event-meta strong { font-size: 1.05rem; }

.quiz-grid { grid-template-columns: repeat(3, 1fr); }
.daily-card { padding: 24px; }
.daily-card h3 { margin: 0 0 22px; font-size: 1.35rem; }
.daily-card div { display: flex; justify-content: space-between; padding: 13px 0; border-top: 1px solid var(--line); color: var(--muted); }
.daily-card b { color: var(--text); }
.daily-card .btn { width: 100%; margin-top: 18px; }

.leaderboard-layout { display: grid; grid-template-columns: 0.75fr 1.25fr; gap: 42px; align-items: center; }
.leaderboard-card { overflow: hidden; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 18px 20px; text-align: left; border-bottom: 1px solid var(--line); }
th { color: var(--accent); font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0; }
td { color: var(--muted); font-weight: 700; }
tbody tr:hover { background: rgba(255,255,255,0.04); }

.rewards { overflow: hidden; border-block: 1px solid var(--line); background: rgba(255,255,255,0.03); }
.reward-track { display: flex; gap: 16px; width: max-content; animation: rewardScroll 22s linear infinite; }
.reward-track span { display: inline-flex; align-items: center; gap: 10px; min-height: 58px; padding: 0 24px; border: 1px solid var(--line); border-radius: var(--radius); background: rgba(255,255,255,0.05); font-weight: 900; }
.reward-track i { color: var(--accent); }
@keyframes rewardScroll { to { transform: translateX(-50%); } }

.testimonial-grid { grid-template-columns: repeat(3, 1fr); }
.testimonial-card { padding: 26px; }
.avatar { display: grid; place-items: center; width: 54px; height: 54px; margin-bottom: 18px; border-radius: 50%; background: linear-gradient(135deg, var(--primary), var(--accent)); font-weight: 900; }
.testimonial-card p { color: var(--muted); line-height: 1.7; }
.stars { color: #FFD166; margin: 16px 0; letter-spacing: 0; }

.faq-wrap { max-width: 850px; }
.faq-list { display: grid; gap: 12px; }
.faq-item { overflow: hidden; }
.faq-item button {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 20px;
  border: 0;
  background: transparent;
  color: var(--text);
  font-weight: 900;
  text-align: left;
  cursor: pointer;
}
.faq-item i { transition: transform 0.25s ease; }
.faq-item.active i { transform: rotate(180deg); }
.faq-panel { height: 0; overflow: hidden; transition: height 0.25s ease; }
.faq-panel p { margin: 0; padding: 0 20px 20px; color: var(--muted); line-height: 1.7; }

.cta-banner { position: relative; overflow: hidden; padding: clamp(34px, 7vw, 68px); text-align: center; }
.cta-banner::before {
  content: "";
  position: absolute;
  inset: -40%;
  background: conic-gradient(from 90deg, transparent, rgba(0,217,255,0.22), rgba(168,85,247,0.28), transparent);
  animation: loadPulse 8s linear infinite;
  z-index: -1;
}
.cta-banner h2 { font-size: clamp(2.4rem, 7vw, 5rem); }
.cta-banner .hero-actions { justify-content: center; }

.site-footer { padding: 56px 0; border-top: 1px solid var(--line); background: rgba(0,0,0,0.16); }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 28px; }
.site-footer p, .site-footer a { color: var(--muted); }
.site-footer h3 { margin: 0 0 14px; }
.site-footer div:not(:first-child) a { display: block; margin: 10px 0; }
.socials { display: flex; gap: 10px; }
.socials a { display: grid; place-items: center; width: 40px; height: 40px; border: 1px solid var(--line); border-radius: var(--radius); }

@media (max-width: 980px) {
  .nav-toggle { display: grid; place-items: center; }
  .nav-menu {
    position: absolute;
    top: 78px;
    left: 16px;
    right: 16px;
    display: grid;
    gap: 16px;
    padding: 20px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgba(11,16,32,0.92);
    backdrop-filter: blur(18px);
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease, transform 0.25s ease;
  }
  .nav-menu.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .hero-grid, .mega-card, .leaderboard-layout { grid-template-columns: 1fr; }
  .hero-visual { min-height: 520px; }
  .stats-grid, .event-meta, .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .category-grid, .quiz-grid, .testimonial-grid, .steps { grid-template-columns: 1fr; }
  .steps::before { display: none; }
}

@media (max-width: 620px) {
  .section-pad { padding: 72px 0; }
  .hero { padding-top: 110px; }
  .hero-actions .btn { width: 100%; }
  .hero-trust { display: grid; }
  .hero-visual { min-height: 470px; }
  .card-a { left: 0; width: 220px; }
  .trophy-card { right: 0; width: 138px; min-height: 146px; }
  .timer-card { right: 3%; bottom: 25%; }
  .board-card { left: 0; bottom: 4%; }
  .coin-two { left: 46%; }
  .question-bubble { width: 68px; height: 68px; font-size: 1.8rem; }
  .stats-grid, .event-meta, .footer-grid { grid-template-columns: 1fr; }
  th, td { padding: 14px 10px; font-size: 0.86rem; }
  .cursor-glow { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; scroll-behavior: auto !important; transition-duration: 0.01ms !important; }
}