:root {
  --sky-50: #f0f9ff;
  --sky-100: #e0f2fe;
  --sky-600: #0284c7;
  --sky-700: #0369a1;
  --slate-50: #f8fafc;
  --slate-100: #f1f5f9;
  --slate-200: #e2e8f0;
  --slate-300: #cbd5e1;
  --slate-400: #94a3b8;
  --slate-600: #475569;
  --slate-800: #1f2937;
  --slate-900: #0f172a;
  --font-sans: system-ui, -apple-system, Segoe UI, Roboto, Inter, Arial, sans-serif;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--slate-800);
  background: linear-gradient(to bottom, var(--sky-100), #fff);
  -webkit-font-smoothing: antialiased;
}
a {
  color: inherit;
  text-decoration: none;
}
.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 1.5rem;
}
header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--slate-200);
}
.h-inner {
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  display: flex;
  gap: 0.75rem;
  align-items: center;
}
.brand img {
  height: 40px;
  width: 40px;
  min-height: 40px;
  min-width: 40px;
  border-radius: 0.75rem;
  box-shadow: 0 4px 12px rgba(2, 132, 199, 0.15);
  display: block !important;
  object-fit: contain;
  visibility: visible !important;
  opacity: 0;
  transition: opacity 0.5s ease-in-out;
}
.brand img.loaded {
  opacity: 1 !important;
}
/* Top right: ONLY language */
.top-actions {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.section {
  padding: 6rem 0;
}
.grid {
  display: grid;
  gap: 3rem;
}
@media (min-width: 1024px) {
  .grid-2 {
    grid-template-columns: 1fr 0.8fr;
    align-items: center;
  }
}

h1 {
  font-size: clamp(2.5rem, 4vw, 3.5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--slate-900);
  line-height: 1.1;
  margin: 0 0 1.5rem;
}
h2 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--slate-900);
  margin: 0 0 1rem;
}
p.lead {
  font-size: 1.25rem;
  color: var(--slate-600);
  max-width: 50ch;
  line-height: 1.6;
  margin: 0 0 2rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border-radius: 1rem;
  padding: 0.75rem 1rem;
  font-size: 0.95rem;
  border: 1px solid var(--sky-600);
  background: var(--sky-600);
  color: #fff;
  transition: filter 0.2s;
}
.btn:hover {
  filter: brightness(0.95);
}
.btn-ghost {
  border: none;
  background: transparent;
  color: var(--slate-800);
}
.btn svg {
  width: 20px;
  height: 20px;
}

/* Language Dropdown */
.lang-dropdown {
  position: relative;
  display: inline-block;
}
.lang-dropdown-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  border: 1px solid var(--slate-200);
  border-radius: 99px;
  background: rgba(255, 255, 255, 0.5);
  backdrop-filter: blur(8px);
  cursor: pointer;
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--slate-800);
  transition: all 0.2s ease;
  min-width: 80px;
  justify-content: space-between;
}
.lang-dropdown-btn:hover {
  background: #fff;
  border-color: var(--slate-300);
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}
.lang-dropdown-btn svg {
  width: 16px;
  height: 16px;
  transition: transform 0.2s ease;
  opacity: 0.5;
}
.lang-dropdown-btn.open svg {
  transform: rotate(180deg);
  opacity: 1;
}
.lang-dropdown-menu {
  position: absolute;
  top: calc(100% + 0.5rem);
  right: 0;
  min-width: 140px;
  background: #fff;
  border: 1px solid var(--slate-200);
  border-radius: 1rem;
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 4px 10px -5px rgba(0,0,0,0.05);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 50;
  overflow: hidden;
  padding: 0.5rem;
}
.lang-dropdown-menu.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.lang-dropdown-item {
  display: flex;
  align-items: center;
  padding: 0.6rem 0.75rem;
  cursor: pointer;
  transition: all 0.15s ease;
  color: var(--slate-600);
  font-size: 0.9rem;
  font-weight: 500;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
  border-radius: 0.5rem;
}
.lang-dropdown-item:hover {
  background: var(--slate-50);
  color: var(--slate-900);
}
.lang-dropdown-item.active {
  background: var(--sky-50);
  color: var(--sky-700);
  font-weight: 600;
}
.lang-dropdown-item.active::after {
  content: "✓";
  margin-left: auto;
  color: var(--sky-600);
  font-weight: 700;
}

.card {
  border: 1px solid var(--slate-200);
  border-radius: 1.5rem;
  background: #fff;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.02), 0 2px 4px -1px rgba(0, 0, 0, 0.02);
  height: 100%;
  display: flex;
  flex-direction: column;
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.05), 0 10px 10px -5px rgba(0, 0, 0, 0.02);
  border-color: var(--sky-200);
}
.card-h {
  padding: 2rem 1.75rem 0.75rem;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1rem;
}
.card-h strong {
  font-size: 1.25rem;
  line-height: 1.3;
  color: var(--slate-900);
  font-weight: 700;
}
.card-c {
  padding: 0 1.75rem 2rem;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--slate-600);
  flex-grow: 1;
}

.steps {
  display: grid;
  gap: 1.5rem;
}
@media (min-width: 768px) {
  .steps {
    grid-template-columns: repeat(4, 1fr);
  }
}
.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  border-radius: 1rem;
  background: var(--sky-50);
  color: var(--sky-600);
  font-weight: 700;
  font-size: 1.25rem;
  border: 1px solid var(--sky-100);
}

/* Footer */
footer {
  background: #fff;
  padding: 4rem 0 2rem;
  font-size: 0.95rem;
  color: var(--slate-600);
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

@media (min-width: 1024px) {
  .footer-content {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Tablet / intermediate */
@media (min-width: 768px) and (max-width: 1023px) {
  .footer-content {
    grid-template-columns: repeat(3, 1fr);
  }
}

.footer-brand {
  display: flex;
  flex-direction: column;
  max-width: 320px;
}

.rounded-logo {
  border-radius: 0.75rem;
}

.footer-brand-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.footer-brand-header img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  object-fit: contain;
}

.footer-desc {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--slate-500);
  margin: 0;
}

.footer-col h4,
.footer-brand h4 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
  color: var(--slate-900);
  margin: 0 0 1.25rem;
}

.footer-links-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links-list li {
  line-height: 1.4;
}

.footer-links-list a {
  color: var(--slate-600);
  transition: color 0.2s;
  text-decoration: none;
}

.footer-links-list a:hover {
  color: var(--sky-600);
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid var(--slate-100);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
  text-align: center;
  font-size: 0.85rem;
  color: var(--slate-400);
}

@media (min-width: 640px) {
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

.social-links-footer {
  display: flex;
  gap: 0.75rem;
}

.social-btn-footer {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--slate-100);
  color: var(--slate-600);
  transition: all 0.2s;
}

.social-btn-footer:hover {
  background: var(--slate-900);
  color: #fff;
  transform: translateY(-2px);
}

.social-btn-footer svg {
  width: 18px;
  height: 18px;
}

/* Bubbles */
.bubbles {
  pointer-events: none;
  position: absolute;
  inset: 0;
}
.bubble {
  position: absolute;
  bottom: -40px;
  width: 14px;
  height: 14px;
  border-radius: 9999px;
  background: rgba(255, 255, 255, 0.85);
  box-shadow: 0 4px 12px rgba(2, 132, 199, 0.25);
  animation: rise 8s ease-in infinite;
  filter: blur(0.2px);
}
@keyframes rise {
  from {
    transform: translateY(0) scale(0.8);
    opacity: 0.8;
  }
  to {
    transform: translateY(-120vh) scale(1);
    opacity: 0;
  }
}

.muted {
  color: var(--slate-600);
}
.center {
  text-align: center;
}
.app-stores {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 2.5rem;
  align-items: center;
}
.app-store-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.875rem 1.5rem;
  background: var(--slate-900);
  color: #fff;
  border-radius: 1rem;
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  transition: all 0.25s ease;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  border: none;
}
.app-store-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  filter: brightness(1.1);
}
.app-store-btn.apple {
  background: #000;
}
.app-store-btn.google {
  background: #fff;
  color: #000;
  border: 1px solid var(--slate-200);
}
.app-store-btn.google:hover {
  background: var(--slate-50);
  border-color: var(--slate-300);
}
.app-store-btn svg {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}
@media (max-width: 640px) {
  .app-stores {
    flex-direction: column;
    align-items: stretch;
  }
  .app-store-btn {
    justify-content: center;
  }
}

/* QR Code */
.qr-code {
  width: 240px;
  height: 240px;
  border-radius: 1.5rem;
  box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.1), 0 0 0 1px rgba(0,0,0,0.05);
  background: #fff;
  padding: 1rem;
  position: relative;
  overflow: hidden;
  transform: rotate(-2deg);
  transition: transform 0.3s ease;
}
.qr-code:hover {
  transform: rotate(0deg) scale(1.02);
}
.qr-code::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.4),
    transparent
  );
  animation: shimmer 1.5s infinite;
  opacity: 0;
  transition: opacity 0.3s;
}
.qr-code.loading::before {
  opacity: 1;
}
.qr-code img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  opacity: 0;
  transition: opacity 0.5s ease-in-out, transform 0.5s ease-out;
}
.qr-code img.loaded {
  opacity: 1;
  transform: scale(1);
}
@keyframes shimmer {
  0% {
    transform: translateX(-100%);
  }
  100% {
    transform: translateX(100%);
  }
}
@media (max-width: 1023px) {
  .qr-code {
    width: 200px;
    height: 200px;
    margin: 0 auto;
  }
}

/* Image loading animations */
.footer-logo-img {
  opacity: 0;
  transition: opacity 0.5s ease-in-out;
}
.footer-logo-img.loaded {
  opacity: 1;
}

/* Smooth text transitions */
[data-i18n] {
  transition: opacity 0.3s ease, transform 0.3s ease;
}
.i18n-fade-out {
  opacity: 0;
  transform: translateY(-4px);
}
.i18n-fade-in {
  opacity: 1;
  transform: translateY(0);
}