/* ========================================
   Variant B: Crystal Light
   ======================================== */

:root {
  --bg: #e3f2fd;
  --bg-gradient: linear-gradient(180deg, #e3f2fd 0%, #bbdefb 40%, #e3f2fd 100%);
  --surface: rgba(255, 255, 255, 0.92);
  --surface-border: rgba(255, 255, 255, 0.95);
  --accent: #ffca28;
  --accent-soft: #ffe082;
  --accent-glow: rgba(255, 202, 40, 0.25);
  --text: #1a2a3a;
  --text-muted: #4a5c6d;
  --font-display: 'Fredoka', sans-serif;
  --font-body: 'Fredoka', sans-serif;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-md: 0 8px 24px rgba(0,0,0,0.08);
  --shadow-lg: 0 16px 48px rgba(0,0,0,0.1);
  --radius: 20px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background: var(--bg-gradient);
  background-attachment: fixed;
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---- HERO ---- */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.hero-bg-wrap {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.18;
  filter: saturate(0.5) brightness(1.1);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(227, 242, 253, 0.3) 0%,
    rgba(227, 242, 253, 0.1) 30%,
    rgba(227, 242, 253, 0.6) 70%,
    var(--bg) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 1;
  padding: 40px 24px;
  animation: heroFadeIn 1s ease-out;
}

.hero-crystal-card {
  display: inline-block;
  background: var(--surface);
  border: 2px solid var(--surface-border);
  border-radius: 28px;
  padding: 16px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-lg), inset 0 1px 0 rgba(255,255,255,0.8);
  backdrop-filter: blur(12px);
  animation: cardFloat 5s ease-in-out infinite;
}

.hero-logo {
  width: 100px;
  height: 100px;
  border-radius: 16px;
  display: block;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 6vw, 3.8rem);
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 8px;
  letter-spacing: 0.04em;
  -webkit-text-stroke: 8px #fff;
  paint-order: stroke fill;
  filter: drop-shadow(0 3px 6px rgba(0,0,0,0.12));
}

.hero-tagline {
  font-family: var(--font-body);
  font-size: clamp(0.95rem, 2.2vw, 1.25rem);
  font-weight: 500;
  color: #2c3e50;
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}

.hero-desc {
  font-size: clamp(0.88rem, 1.6vw, 1rem);
  font-weight: 400;
  color: var(--text-muted);
  max-width: 480px;
  margin: 0 auto 32px;
  line-height: 1.7;
}

.hero-cta {
  display: inline-block;
  transition: transform 0.3s ease, filter 0.3s ease;
}

.hero-cta:hover {
  transform: translateY(-3px) scale(1.04);
  filter: drop-shadow(0 6px 20px var(--accent-glow));
}

.cta-badge {
  height: 50px;
  display: block;
}

/* ---- FEATURES ---- */

.features {
  padding: 80px 0 100px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3.5vw, 2rem);
  font-weight: 600;
  text-align: center;
  color: var(--text);
  margin-bottom: 48px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.feature-card {
  background: var(--surface);
  border: 1.5px solid var(--surface-border);
  border-radius: var(--radius);
  padding: 28px 24px;
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-md), inset 0 1px 0 rgba(255,255,255,0.7);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  animation: cardReveal 0.5s ease-out both;
  animation-delay: calc(var(--i) * 0.1s);
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg), 0 0 0 1px var(--accent-soft);
}

.feature-icon {
  width: 36px;
  height: 36px;
  color: var(--accent);
  margin-bottom: 14px;
  background: rgba(255, 202, 40, 0.12);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 7px;
}

.feature-icon svg {
  width: 100%;
  height: 100%;
}

.feature-card h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text);
}

.feature-card p {
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ---- SCREENSHOTS ---- */

.screenshots {
  padding: 60px 0 80px;
}

.screenshot-gallery {
  display: flex;
  gap: 16px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  padding: 8px 0 20px;
  scrollbar-width: thin;
  scrollbar-color: var(--accent-soft) transparent;
}

.screenshot-gallery::-webkit-scrollbar {
  height: 4px;
}

.screenshot-gallery::-webkit-scrollbar-track {
  background: transparent;
}

.screenshot-gallery::-webkit-scrollbar-thumb {
  background: var(--accent-soft);
  border-radius: 4px;
}

.screenshot-card {
  flex: 0 0 auto;
  width: 200px;
  scroll-snap-align: center;
  border-radius: var(--radius);
  overflow: hidden;
  border: 2px solid rgba(255, 255, 255, 0.8);
  box-shadow: var(--shadow-md);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  animation: cardReveal 0.5s ease-out both;
  animation-delay: calc(var(--i) * 0.08s + 0.2s);
}

.screenshot-card:hover {
  transform: translateY(-6px) scale(1.02);
  box-shadow: var(--shadow-lg), 0 0 0 2px var(--accent-soft);
}

.screenshot-card img {
  width: 100%;
  height: auto;
  display: block;
}

/* ---- CTA BOTTOM ---- */

.cta-bottom {
  padding: 60px 0 80px;
}

.cta-crystal-card {
  background: var(--surface);
  border: 1.5px solid var(--surface-border);
  border-radius: 28px;
  padding: 48px 32px;
  text-align: center;
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-lg), inset 0 1px 0 rgba(255,255,255,0.8);
}

.cta-bottom-title {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3.5vw, 2rem);
  font-weight: 600;
  color: var(--text);
  margin-bottom: 10px;
}

.cta-bottom-desc {
  font-size: 0.95rem;
  font-weight: 400;
  color: var(--text-muted);
  margin-bottom: 28px;
}

.cta-bottom-link {
  display: inline-block;
  transition: transform 0.3s ease, filter 0.3s ease;
}

.cta-bottom-link:hover {
  transform: translateY(-3px) scale(1.04);
  filter: drop-shadow(0 6px 20px var(--accent-glow));
}

/* ---- FOOTER ---- */

.footer {
  padding: 28px 0;
  text-align: center;
}

.footer p {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* ---- ANIMATIONS ---- */

@keyframes heroFadeIn {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes cardFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

@keyframes cardReveal {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---- LIGHTBOX ---- */

.screenshot-card {
  cursor: pointer;
}

.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(0, 0, 0, 0.88);
  backdrop-filter: blur(8px);
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.lightbox.active {
  display: flex;
  animation: lightboxFadeIn 0.25s ease-out;
}

.lightbox-img {
  max-width: 90vw;
  max-height: 90vh;
  border-radius: 12px;
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.5);
  object-fit: contain;
}

.lightbox-close {
  position: absolute;
  top: 20px;
  right: 24px;
  background: none;
  border: none;
  color: #fff;
  font-size: 2.4rem;
  cursor: pointer;
  line-height: 1;
  padding: 4px 12px;
  border-radius: 8px;
  transition: background 0.2s;
}

.lightbox-close:hover {
  background: rgba(255, 255, 255, 0.15);
}

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255, 255, 255, 0.1);
  border: none;
  color: #fff;
  font-size: 2.5rem;
  cursor: pointer;
  padding: 8px 16px;
  border-radius: 12px;
  transition: background 0.2s;
}

.lightbox-nav:hover {
  background: rgba(255, 255, 255, 0.25);
}

.lightbox-prev { left: 16px; }
.lightbox-next { right: 16px; }

@keyframes lightboxFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@media (max-width: 768px) {
  .lightbox-nav {
    font-size: 1.8rem;
    padding: 6px 12px;
  }
  .lightbox-prev { left: 8px; }
  .lightbox-next { right: 8px; }
}

/* ---- RESPONSIVE ---- */

@media (max-width: 768px) {
  .features-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .feature-card {
    padding: 22px 18px;
  }

  .screenshot-card {
    width: 170px;
  }

  .hero-logo {
    width: 84px;
    height: 84px;
  }

  .cta-badge {
    height: 42px;
  }

  .cta-crystal-card {
    padding: 36px 20px;
  }
}

@media (min-width: 769px) {
  .screenshot-gallery {
    justify-content: center;
  }

  .screenshot-card {
    width: 220px;
  }
}