/* ===== RESET & BASE ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --blue: #2563EB;
  --blue-dark: #1D4ED8;
  --blue-light: #EFF6FF;
  --black: #0F172A;
  --dark: #1E293B;
  --gray: #64748B;
  --gray-light: #F1F5F9;
  --white: #FFFFFF;
  --border: #E2E8F0;

  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(0,0,0,0.08), 0 4px 16px rgba(0,0,0,0.06);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.12);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--white);
  color: var(--black);
  line-height: 1.6;
  font-size: 16px;
}

a {
  text-decoration: none;
  color: inherit;
}

img {
  max-width: 100%;
  display: block;
}

/* ===== HEADER ===== */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

/* Logo */
.logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--black);
  letter-spacing: -0.5px;
  flex-shrink: 0;
}

.logo span {
  color: var(--blue);
}

/* Nav */
nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

nav a {
  font-size: 14px;
  font-weight: 500;
  color: var(--gray);
  padding: 6px 12px;
  border-radius: 8px;
  transition: color 0.2s, background 0.2s;
}

nav a:hover,
nav a.active {
  color: var(--black);
  background: var(--gray-light);
}

/* Header right */
.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

/* Language switcher */
.lang-switcher {
  display: flex;
  align-items: center;
  gap: 2px;
  background: var(--gray-light);
  border-radius: 8px;
  padding: 3px;
}

.lang-btn {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  color: var(--gray);
  padding: 4px 10px;
  border-radius: 6px;
  transition: all 0.2s;
  font-family: var(--font);
}

.lang-btn.active {
  background: var(--white);
  color: var(--blue);
  box-shadow: 0 1px 4px rgba(0,0,0,0.1);
}

/* Mobile menu button */
.menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  color: var(--black);
}

.menu-btn svg {
  display: block;
}

/* Mobile nav */
.mobile-nav {
  display: none;
  flex-direction: column;
  padding: 12px 24px 16px;
  border-top: 1px solid var(--border);
  background: var(--white);
}

.mobile-nav a {
  font-size: 15px;
  font-weight: 500;
  color: var(--dark);
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}

.mobile-nav a:last-child {
  border-bottom: none;
}

.mobile-nav.open {
  display: flex;
}

/* ===== FOOTER ===== */
footer {
  background: var(--black);
  color: rgba(255,255,255,0.7);
  margin-top: 80px;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 24px 32px;
}

.footer-top {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-brand .logo {
  color: var(--white);
  margin-bottom: 10px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.6;
}

.footer-col h4 {
  color: var(--white);
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col ul li a {
  font-size: 14px;
  color: rgba(255,255,255,0.6);
  transition: color 0.2s;
}

.footer-col ul li a:hover {
  color: var(--white);
}

.footer-bottom {
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom p {
  font-size: 13px;
}

.footer-bottom-links {
  display: flex;
  gap: 20px;
}

.footer-bottom-links a {
  font-size: 13px;
  color: rgba(255,255,255,0.5);
  transition: color 0.2s;
}

.footer-bottom-links a:hover {
  color: var(--white);
}

/* ===== CONTAINER ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  border: none;
  font-family: var(--font);
}

.btn-primary {
  background: var(--blue);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--blue-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.4);
}

.btn-outline {
  background: transparent;
  color: var(--blue);
  border: 2px solid var(--blue);
}

.btn-outline:hover {
  background: var(--blue);
  color: var(--white);
}

.btn-dark {
  background: var(--black);
  color: var(--white);
}

.btn-dark:hover {
  background: var(--dark);
  transform: translateY(-1px);
}

/* Google Play button */
.btn-play {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--black);
  color: var(--white);
  padding: 10px 20px;
  border-radius: 10px;
  font-size: 13px;
  font-weight: 500;
  transition: all 0.2s;
}

.btn-play:hover {
  background: var(--dark);
  transform: translateY(-1px);
}

.btn-play .play-text small {
  display: block;
  font-size: 10px;
  opacity: 0.7;
  font-weight: 400;
}

.btn-play .play-text strong {
  font-size: 15px;
  font-weight: 700;
}

/* ===== HERO ===== */
.hero {
  padding: 80px 0 60px;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--blue-light);
  color: var(--blue);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 50px;
  margin-bottom: 24px;
}

.hero h1 {
  font-size: clamp(36px, 5vw, 60px);
  font-weight: 800;
  color: var(--black);
  line-height: 1.15;
  letter-spacing: -1.5px;
  margin-bottom: 20px;
}

.hero h1 span {
  color: var(--blue);
}

.hero p {
  font-size: clamp(16px, 2vw, 19px);
  color: var(--gray);
  max-width: 560px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

/* ===== SECTION ===== */
.section {
  padding: 64px 0;
}

.section-title {
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 700;
  color: var(--black);
  letter-spacing: -0.5px;
  margin-bottom: 8px;
}

.section-sub {
  font-size: 16px;
  color: var(--gray);
  margin-bottom: 40px;
}

/* ===== APP CARDS ===== */
.apps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.app-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px;
  transition: all 0.25s;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.app-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: transparent;
  transform: translateY(-4px);
}

.app-icon {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
}

.app-icon.wallpaper { background: linear-gradient(135deg, #667eea, #764ba2); }
.app-icon.currency  { background: linear-gradient(135deg, #f093fb, #f5576c); }
.app-icon.workout   { background: linear-gradient(135deg, #4facfe, #00f2fe); }

.app-card h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--black);
}

.app-card p {
  font-size: 14px;
  color: var(--gray);
  line-height: 1.6;
  flex: 1;
}

.app-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.app-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--blue);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap 0.2s;
}

.app-link:hover {
  gap: 8px;
}

/* ===== FEATURES ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.feature-item {
  padding: 24px;
  background: var(--gray-light);
  border-radius: var(--radius);
}

.feature-icon {
  font-size: 28px;
  margin-bottom: 12px;
}

.feature-item h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--black);
  margin-bottom: 6px;
}

.feature-item p {
  font-size: 14px;
  color: var(--gray);
  line-height: 1.6;
}

/* ===== PAGE HEADER ===== */
.page-hero {
  padding: 60px 0 40px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 48px;
}

.page-hero h1 {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 10px;
}

.page-hero p {
  font-size: 16px;
  color: var(--gray);
}

/* ===== PROSE (Privacy, Terms) ===== */
.prose {
  max-width: 760px;
  margin: 0 auto;
  padding-bottom: 60px;
}

.prose h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--black);
  margin: 36px 0 12px;
}

.prose h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--dark);
  margin: 24px 0 8px;
}

.prose p {
  font-size: 15px;
  color: #374151;
  line-height: 1.8;
  margin-bottom: 14px;
}

.prose ul {
  padding-left: 20px;
  margin-bottom: 14px;
}

.prose ul li {
  font-size: 15px;
  color: #374151;
  line-height: 1.8;
  margin-bottom: 6px;
}

.prose a {
  color: var(--blue);
  text-decoration: underline;
}

.prose .last-updated {
  font-size: 13px;
  color: var(--gray);
  margin-bottom: 32px;
  padding: 10px 16px;
  background: var(--gray-light);
  border-radius: 8px;
  display: inline-block;
}

/* ===== CONTACT ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  max-width: 900px;
  margin: 0 auto;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 14px;
  font-weight: 600;
  color: var(--dark);
}

.form-group input,
.form-group textarea,
.form-group select {
  padding: 12px 16px;
  border: 1.5px solid var(--border);
  border-radius: 10px;
  font-size: 15px;
  font-family: var(--font);
  color: var(--black);
  background: var(--white);
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
  resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.form-group textarea {
  min-height: 120px;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 20px;
  background: var(--gray-light);
  border-radius: var(--radius);
}

.contact-item-icon {
  font-size: 24px;
  flex-shrink: 0;
}

.contact-item h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--black);
  margin-bottom: 4px;
}

.contact-item p, .contact-item a {
  font-size: 14px;
  color: var(--gray);
}

.contact-item a:hover {
  color: var(--blue);
}

/* Success message */
.form-success {
  display: none;
  padding: 16px 20px;
  background: #ECFDF5;
  border: 1px solid #6EE7B7;
  border-radius: 10px;
  color: #065F46;
  font-size: 14px;
  font-weight: 500;
}

/* ===== DIVIDER ===== */
.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 48px 0;
}

/* ===== BADGE ===== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: 50px;
  font-size: 12px;
  font-weight: 600;
}

.badge-blue {
  background: var(--blue-light);
  color: var(--blue);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .apps-grid,
  .features-grid {
    grid-template-columns: 1fr 1fr;
  }

  .footer-top {
    grid-template-columns: 1fr 1fr;
  }

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

@media (max-width: 640px) {
  nav {
    display: none;
  }

  .menu-btn {
    display: flex;
  }

  .apps-grid,
  .features-grid {
    grid-template-columns: 1fr;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero {
    padding: 48px 0 40px;
  }
}

/* ===== HIDDEN by lang ===== */
[data-lang] {
  display: none;
}

[data-lang].visible {
  display: inline;
}

[data-lang-block] {
  display: none;
}

[data-lang-block].visible {
  display: block;
}