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

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  background: #0a3b5c;
  color: #06283d;
}

.ocean-wrapper {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1.5rem;
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg,
    #cdeaf9 0%,
    #9fd3ee 18%,
    #6fb8dd 38%,
    #3d8fbc 58%,
    #1f6b94 78%,
    #0d4a6e 100%);
}

.ocean-wrapper::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% 0%, rgba(255, 255, 255, 0.55) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 15% 25%, rgba(255, 255, 255, 0.25) 0%, transparent 70%),
    radial-gradient(ellipse 70% 45% at 85% 40%, rgba(190, 235, 255, 0.3) 0%, transparent 70%);
  pointer-events: none;
}

.ocean-wrapper::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 80%, rgba(255, 255, 255, 0.08) 1px, transparent 2px),
    radial-gradient(circle at 60% 60%, rgba(255, 255, 255, 0.06) 1px, transparent 2px),
    radial-gradient(circle at 80% 30%, rgba(255, 255, 255, 0.07) 1px, transparent 2px),
    radial-gradient(circle at 40% 45%, rgba(255, 255, 255, 0.05) 1px, transparent 2px),
    radial-gradient(circle at 70% 85%, rgba(255, 255, 255, 0.06) 1px, transparent 2px);
  background-size: 220px 220px, 180px 180px, 260px 260px, 200px 200px, 240px 240px;
  pointer-events: none;
  opacity: 0.9;
}

.content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 600px;
  width: 100%;
}

h1 {
  font-size: clamp(2.8rem, 10vw, 4.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #ffffff;
  margin-bottom: 2rem;
  text-shadow: 0 4px 16px rgba(6, 40, 61, 0.5), 0 1px 2px rgba(6, 40, 61, 0.4);
}

.download-btn {
  display: inline-block;
  background: linear-gradient(135deg, #ffffff, #e6f4fb);
  color: #0a3b5c;
  font-size: 1.25rem;
  font-weight: 600;
  padding: 1rem 2.8rem;
  border-radius: 60px;
  text-decoration: none;
  letter-spacing: 0.01em;
  box-shadow: 0 10px 24px -8px rgba(6, 40, 61, 0.55), 0 0 0 1px rgba(255, 255, 255, 0.8) inset;
  transition: background 0.2s ease, box-shadow 0.2s ease, transform 0.1s ease;
}

.download-btn:hover {
  background: linear-gradient(135deg, #ffffff, #d4ecf9);
  box-shadow: 0 14px 28px -8px rgba(6, 40, 61, 0.65), 0 0 0 1px rgba(255, 255, 255, 0.9) inset;
}

.download-btn:active {
  transform: scale(0.98);
  box-shadow: 0 6px 14px -4px rgba(6, 40, 61, 0.55);
}

.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem 2rem;
  padding: 1.5rem 2rem;
  font-size: 0.95rem;
  color: #ffffff;
  background: linear-gradient(180deg, rgba(10, 59, 92, 0.6), rgba(6, 40, 61, 0.85));
  backdrop-filter: blur(6px);
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.footer-left,
.footer-right {
  display: flex;
  align-items: center;
}

.footer-link {
  color: #ffffff;
  text-decoration: none;
  font-weight: 600;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease, opacity 0.2s ease;
  margin-left: 0.3rem;
}

.footer-link:hover {
  border-bottom-color: #ffffff;
  opacity: 0.9;
}

@media (max-width: 480px) {
  .download-btn {
    padding: 0.9rem 2rem;
    font-size: 1.1rem;
  }

  .footer {
    flex-direction: column;
    text-align: center;
    padding: 1.5rem 1rem;
  }
}