:root {
  --primary: #BD4B5E;
  --on-primary: #24201D;
  --surface: #24201D;
  --surface-container: rgba(47, 42, 39, 0.5);
  --on-surface: #EFE5DE;
  --on-surface-variant: #A89A90;
  --outline: #3E352F;
  --heart-color: #BD4B5E;
  font-size: 100%;
}

:root.light-theme {
  --primary: #800032;
  --on-primary: #FFFFFF;
  --surface: #D5B59C;
  --surface-container: rgba(230, 213, 199, 0.5);
  --on-surface: #3E2723;
  --on-surface-variant: #6D4C41;
  --outline: #BC9F8D;
  --heart-color: #800032;
}

body {
  background-color: var(--surface);
  color: var(--on-surface);
  font-family: 'Nunito', sans-serif;
  margin: 0;
  overflow-x: hidden;
  overflow-y: auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color 0.4s ease;
}

#particles-js {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

.header-controls {
  position: sticky;
  top: 0;
  width: 100%;
  display: flex;
  justify-content: flex-end;
  padding: 1rem 1.25rem;
  box-sizing: border-box;
  z-index: 10;
}

.controls-group {
  display: flex;
  gap: 0.625rem;
  align-items: center;
}

.icon-btn,
.lang-btn {
  background: var(--surface-container);
  border: 0.0625rem solid var(--outline);
  color: var(--on-surface);
  border-radius: 0.75rem;
  cursor: pointer;
  transition: all 0.2s ease;
  backdrop-filter: blur(0.625rem);
  -webkit-backdrop-filter: blur(0.625rem);
  display: flex;
  align-items: center;
  justify-content: center;
}

.lang-btn {
  padding: 0.5rem 0.75rem;
  font-family: 'Outfit', sans-serif;
  font-size: 0.8125rem;
  font-weight: 700;
  min-width: 2.75rem;
  height: 2.5rem;
}

.lang-btn.active {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

.icon-btn {
  width: 2.5rem;
  height: 2.5rem;
  font-size: 1.1rem;
}

main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.25rem;
  z-index: 2;
}

.container {
  text-align: center;
  padding: 3rem 1.5rem;
  width: 100%;
  max-width: 33.75rem;
  background: var(--surface-container);
  backdrop-filter: blur(1.5rem);
  -webkit-backdrop-filter: blur(1.5rem);
  border-radius: 2.5rem;
  border: 0.0625rem solid var(--outline);
  box-sizing: border-box;
}

h1 {
  font-family: 'Outfit', sans-serif;
  font-size: clamp(1.625rem, 8vw, 2.625rem);
  color: var(--on-surface);
  margin: 0;
  font-weight: 700;
  line-height: 1.2;
}

.subtitle {
  font-family: 'Outfit', sans-serif;
  margin: 0.5rem 0 1.5rem 0;
  font-size: clamp(1rem, 5vw, 1.25rem);
  font-weight: 600;
  color: var(--on-surface);
  letter-spacing: 0.2rem;
  opacity: 0.9;
}

p {
  font-size: clamp(0.9375rem, 4vw, 1.0625rem);
  line-height: 1.6;
  color: var(--on-surface-variant);
  margin-bottom: 2rem;
}

.button-group {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
}

@media (min-width: 30rem) {
  .button-group {
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
  }
}

.btn-download {
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--primary);
  color: var(--on-primary);
  padding: 0.875rem 1.5rem;
  border-radius: 999px;
  gap: 0.75rem;
  text-decoration: none;
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  transition: transform 0.1s ease;
}

.btn-download i {
  color: inherit;
  font-size: 1.25rem;
}

.btn-download:active {
  transform: scale(0.98);
}

@keyframes pulse-glow {

  0%,
  100% {
    box-shadow: 0 0 0.625rem rgba(189, 75, 94, 0.3);
  }

  50% {
    box-shadow: 0 0 1.25rem rgba(189, 75, 94, 0.6);
  }
}

.fade-in {
  opacity: 0;
  transform: translateY(1.25rem);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.delay-1 {
  transition-delay: 0.1s;
}

.delay-2 {
  transition-delay: 0.2s;
}

.delay-3 {
  transition-delay: 0.3s;
}

.delay-4 {
  transition-delay: 0.4s;
}

.footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
  padding: 2rem 1.5rem calc(2rem + env(safe-area-inset-bottom));
  font-family: 'Outfit', sans-serif;
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--on-surface-variant);
  opacity: 0.8;
  letter-spacing: 0.04rem;
  text-align: center;
}

.legal-link,
.legal-link:visited,
.legal-link:active,
.legal-link:focus {
  color: inherit;
  text-decoration: none;
  outline: none;
  -webkit-tap-highlight-color: transparent;
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  user-select: none;
}

.legal-link:hover {
  opacity: 1;
  color: inherit;
  text-decoration: none;
}

.footer-separator {
  opacity: 0.8;
  user-select: none;
}