/* ── Lessonary Landing Page — Custom Styles ─────────────────────────────── */

/* Smooth scrolling */
html {
  scroll-behavior: smooth;
}

/* ── Nav transitions ────────────────────────────────────────────────────── */
.nav-bar {
  transition: background-color 0.3s ease, box-shadow 0.3s ease, backdrop-filter 0.3s ease;
}

.nav-bar.scrolled {
  background-color: rgba(255, 255, 255, 0.97);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
  backdrop-filter: blur(12px);
}

.nav-bar.scrolled .nav-link {
  color: #111827;
}

.nav-bar.scrolled .nav-logo-dark { display: block; }
.nav-bar.scrolled .nav-logo-light { display: none; }

.nav-bar:not(.scrolled) .nav-logo-dark { display: none; }
.nav-bar:not(.scrolled) .nav-logo-light { display: block; }

/* ── Scroll-triggered animations ────────────────────────────────────────── */
[data-animate] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

[data-animate].animate-in {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered delays */
[data-animate][data-delay="1"] { transition-delay: 0.1s; }
[data-animate][data-delay="2"] { transition-delay: 0.2s; }
[data-animate][data-delay="3"] { transition-delay: 0.3s; }
[data-animate][data-delay="4"] { transition-delay: 0.4s; }

/* ── Hero gradient ──────────────────────────────────────────────────────── */
.hero-gradient {
  background: linear-gradient(135deg, #0F172A 0%, #1E293B 50%, #0F172A 100%);
  position: relative;
  overflow: hidden;
}

.hero-gradient::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 50%, rgba(67, 56, 202, 0.15) 0%, transparent 50%),
              radial-gradient(circle at 70% 80%, rgba(16, 185, 129, 0.1) 0%, transparent 40%);
  animation: heroGlow 15s ease-in-out infinite alternate;
}

@keyframes heroGlow {
  0% { transform: translate(0, 0); }
  100% { transform: translate(-5%, 3%); }
}

/* ── Counter animation ──────────────────────────────────────────────────── */
.counter {
  font-variant-numeric: tabular-nums;
}

/* ── Onboarding cards scroll ────────────────────────────────────────────── */
.cards-scroll {
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.cards-scroll::-webkit-scrollbar {
  display: none;
}

.card-item {
  scroll-snap-align: start;
  flex-shrink: 0;
}

.card-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.12);
}

.card-item {
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

/* ── Feature icons ──────────────────────────────────────────────────────── */
.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

/* ── AI Showcase mockup ─────────────────────────────────────────────────── */
.ai-mockup {
  background: linear-gradient(135deg, #F9F9F7 0%, #EEF2FF 100%);
  border-radius: 16px;
  border: 1px solid #E5E7EB;
  overflow: hidden;
}

.ai-before, .ai-after {
  padding: 20px 24px;
  font-size: 0.95rem;
  line-height: 1.7;
}

.ai-before {
  background: #FFF;
  border-bottom: 1px solid #E5E7EB;
  color: #6B7280;
}

.ai-after {
  background: linear-gradient(135deg, #EEF2FF 0%, #F0FDF4 100%);
  color: #111827;
}

.ai-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8px;
  background: #4338CA;
  color: white;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* ── CTA gradient ───────────────────────────────────────────────────────── */
.cta-gradient {
  background: linear-gradient(135deg, #0F172A 0%, #1E293B 60%, #0F172A 100%);
}

/* ── Mobile menu overlay ────────────────────────────────────────────────── */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 100;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.mobile-menu.open {
  opacity: 1;
  pointer-events: auto;
}

.mobile-menu-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
}

.mobile-menu-panel {
  position: absolute;
  top: 0;
  right: 0;
  width: 80%;
  max-width: 320px;
  height: 100%;
  background: white;
  transform: translateX(100%);
  transition: transform 0.3s ease;
  padding: 24px;
  overflow-y: auto;
}

.mobile-menu.open .mobile-menu-panel {
  transform: translateX(0);
}

/* ── Button hover effects ───────────────────────────────────────────────── */
.btn-primary {
  transition: background-color 0.2s ease, transform 0.15s ease;
}
.btn-primary:hover {
  background-color: #3730A3;
  transform: translateY(-1px);
}

.btn-ghost {
  transition: background-color 0.2s ease, transform 0.15s ease;
}
.btn-ghost:hover {
  background-color: rgba(255, 255, 255, 0.1);
  transform: translateY(-1px);
}

.btn-ghost-dark:hover {
  background-color: rgba(67, 56, 202, 0.08);
}

/* ── Step badge ─────────────────────────────────────────────────────────── */
.step-badge {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: #4338CA;
  color: white;
  font-weight: 700;
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  justify-content: center;
  position: absolute;
  top: 16px;
  left: 16px;
  z-index: 2;
}

/* ── Language dropdown ──────────────────────────────────────────────────── */
.lang-dropdown {
  position: relative;
}

.lang-dropdown-menu {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 8px;
  background: white;
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
  min-width: 140px;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-8px);
  transition: opacity 0.2s ease, transform 0.2s ease;
  z-index: 50;
}

.lang-dropdown-menu.open {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.lang-dropdown-menu a {
  display: block;
  padding: 8px 16px;
  color: #111827;
  text-decoration: none;
  font-size: 0.875rem;
  transition: background-color 0.15s ease;
}

.lang-dropdown-menu a:hover {
  background-color: #F3F4F6;
}

.lang-dropdown-menu a:first-child {
  border-radius: 8px 8px 0 0;
}

.lang-dropdown-menu a:last-child {
  border-radius: 0 0 8px 8px;
}

/* ── Responsive ─────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .hero-stats {
    flex-direction: column;
    gap: 12px;
  }
}