* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #050505;
  color: white;
  text-align: center;
}

h1,
h2,
h3 {
  margin-top: 0;
}

p {
  color: #aaa;
  line-height: 1.6;
}

section {
  padding: 70px 20px;
}

/* STICKY SECTION HEADERS */
section h2 {
  position: sticky;
  top: 0;
  z-index: 5;
  padding: 18px 20px;
  margin: 0 0 35px;
  background: rgba(5, 5, 5, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(0, 255, 120, 0.2);
}

/* HERO */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 90px 20px 80px;
  text-align: center;
  overflow: hidden;
  position: relative;
  background:
    radial-gradient(circle at center, rgba(0, 255, 120, 0.17), transparent 38%),
    radial-gradient(circle at top, #111, #050505 70%);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(115deg, transparent 30%, rgba(0, 255, 120, 0.07), transparent 58%);
  opacity: 0.7;
  pointer-events: none;
  animation: slowBeam 9s ease-in-out infinite alternate;
}

.hero-content {
  position: relative;
  z-index: 2;
  width: min(1100px, 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero h1 {
  max-width: 1250px;
  font-size: clamp(2.8rem, 6vw, 5rem);
  line-height: 1.05;
  margin-bottom: 18px;
  text-shadow:
    0 0 20px rgba(0, 255, 120, 0.45),
    0 0 60px rgba(0, 255, 120, 0.18);
}

.hero-subtitle {
  max-width: 680px;
  margin: 0 auto 32px;
  color: #c8d8ce;
  font-size: clamp(1rem, 2vw, 1.15rem);
}

/* LOGO */
.hero-logo-main {
  width: min(420px, 78vw);
  margin: 12px 0 30px;
  opacity: 1;
  border-radius: 10px;
  filter:
    drop-shadow(0 0 28px rgba(0, 255, 120, 0.65))
    drop-shadow(0 0 70px rgba(0, 255, 120, 0.28));
  animation: logoFloat 5s ease-in-out infinite;
}

/* STORE BUTTONS */
.store-buttons {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
}

.store-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 225px;
  padding: 14px 24px;
  border-radius: 9px;
  color: white;
  font-weight: 700;
  text-decoration: none;
  border: 1px solid rgba(0, 255, 120, 0.45);
  background: rgba(0, 0, 0, 0.72);
  box-shadow: 0 0 18px rgba(0, 255, 120, 0.22);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.store-btn:hover {
  transform: translateY(-3px);
  border-color: rgba(0, 255, 120, 0.9);
  box-shadow: 0 0 26px rgba(0, 255, 120, 0.45);
}

.google {
  color: #00ff78;
}

.apple {
  color: #ffffff;
}

/* PREVIEW */
.preview {
  background: #070707;
}

.preview h2,
.features h2,
.how h2,
.cta h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  text-shadow: 0 0 18px rgba(0, 255, 120, 0.28);
}

/* SCREENSHOTS */
.screenshots {
  display: flex;
  justify-content: center;
  gap: 30px;
  flex-wrap: wrap;
}

.screenshots img {
  width: min(330px, 90vw);
  border-radius: 28px;
  border: 1px solid rgba(0, 255, 120, 0.35);
  box-shadow:
    0 0 25px rgba(0, 255, 120, 0.22),
    0 25px 70px rgba(0, 0, 0, 0.6);
}

/* FEATURES */
.features {
  background:
    radial-gradient(circle at center, rgba(0, 255, 120, 0.08), transparent 45%),
    #050505;
}

.feature-grid {
  max-width: 1050px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.feature {
  padding: 28px 22px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid rgba(0, 255, 120, 0.18);
  box-shadow: 0 0 22px rgba(0, 255, 120, 0.08);
}

.feature h3 {
  color: #00ff78;
  margin-bottom: 10px;
}

/* HOW */
.how {
  background: #070707;
}

/* VIDEO GRID */
.video-grid {
  max-width: 1400px;
  margin: 0 auto;

  display: grid;
  grid-template-columns: repeat(3, 1fr);

  gap: 28px;
  align-items: start;
}

.video-card {
  padding: 18px;

  border-radius: 22px;

  border: 1px solid rgba(0, 255, 120, 0.22);

  background: rgba(255, 255, 255, 0.03);

  box-shadow:
    0 0 24px rgba(0, 255, 120, 0.10),
    0 18px 50px rgba(0, 0, 0, 0.42);

  transition:
    transform 0.3s ease,
    box-shadow 0.3s ease;
}

.video-card:hover {
  transform: translateY(-4px);

  box-shadow:
    0 0 34px rgba(0, 255, 120, 0.18),
    0 22px 60px rgba(0, 0, 0, 0.52);
}

.video-frame {
  width: 100%;
  aspect-ratio: 16 / 9;

  overflow: hidden;

  border-radius: 16px;

  margin-bottom: 18px;

  border: 1px solid rgba(0, 255, 120, 0.18);

  background: #000;
}

.video-frame iframe {
  width: 100%;
  height: 100%;
}

.video-card h3 {
  color: #00ff78;
  margin-bottom: 10px;
  font-size: 1.15rem;
  text-align: center;
}

.video-card p {
  color: #a8a8a8;
  line-height: 1.6;
  font-size: 0.95rem;
  text-align: center;
}

/* CTA */
.cta {
  background:
    radial-gradient(circle at center, rgba(0, 255, 120, 0.14), transparent 42%),
    #050505;
}

/* FOOTER */
footer {
  padding: 28px 20px;
  background: #030303;
  border-top: 1px solid rgba(0, 255, 120, 0.16);
}

footer p {
  margin: 0;
  color: #777;
}

/* ANIMATIONS */
@keyframes logoFloat {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-12px);
  }
}

@keyframes slowBeam {
  from {
    transform: translateX(-3%);
    opacity: 0.35;
  }
  to {
    transform: translateX(3%);
    opacity: 0.75;
  }
}

/* MOBILE */
@media (max-width: 1000px) {
  .video-grid {
    grid-template-columns: 1fr;
    max-width: 650px;
  }
}

@media (max-width: 900px) {
  .hero {
    padding: 75px 18px 65px;
  }

  .hero h1 {
    font-size: clamp(2.35rem, 12vw, 4rem);
  }

  .hero-logo-main {
    width: min(330px, 82vw);
  }

  .feature-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 600px) {
  .store-btn {
    width: 100%;
    max-width: 310px;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }
}

/* ACCESSIBILITY */
@media (prefers-reduced-motion: reduce) {
  .hero::before,
  .hero-logo-main {
    animation: none;
  }
}

/* SCROLL FADE-IN */
section.hidden {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

section.visible {
  opacity: 1;
  transform: translateY(0);
}