/* ========================================
   SINK ZONE LANDING PAGE — DESIGN SYSTEM
   ======================================== */

/* --- Reset & Base --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg-deep: #060d18;
  --bg-surface: #0a1628;
  --bg-card: #0d1b33;
  --cyan: #39dcff;
  --cyan-dim: rgba(57, 220, 255, 0.15);
  --cyan-glow: rgba(57, 220, 255, 0.4);
  --orange: #ff8c32;
  --orange-glow: rgba(255, 140, 50, 0.3);
  --text-primary: #edf7fa;
  --text-secondary: #8cb5bc;
  --text-muted: #4a7a85;
  --font-display: 'Exo 2', sans-serif;
  --font-body: 'Inter', sans-serif;
  --radius: 12px;
  --radius-lg: 20px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

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

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

.accent {
  color: var(--cyan);
}


/* ========================================
   HERO SECTION
   ======================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: url('images/hero-bg.png') center/cover no-repeat;
  overflow: hidden;
}

.hero-bg-overlay {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at center top, rgba(6, 13, 24, 0.3) 0%, rgba(6, 13, 24, 0.85) 60%, var(--bg-deep) 100%),
    linear-gradient(to bottom, transparent 60%, var(--bg-deep) 100%);
  z-index: 1;
}

.hero-particles {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
}

.hero-particles .particle {
  position: absolute;
  width: 2px;
  height: 2px;
  background: var(--cyan);
  border-radius: 50%;
  opacity: 0;
  animation: particleFloat 6s ease-in-out infinite;
}

@keyframes particleFloat {
  0%, 100% { opacity: 0; transform: translateY(0); }
  50% { opacity: 0.6; transform: translateY(-80px); }
}

.hero-content {
  position: relative;
  z-index: 3;
  padding: 40px 24px;
}

.hero-logo {
  width: 160px;
  height: 160px;
  border-radius: 32px;
  object-fit: cover;
  margin-bottom: 24px;
  filter: drop-shadow(0 0 40px var(--cyan-glow)) drop-shadow(0 8px 32px rgba(0,0,0,0.6));
  animation: logoFloat 4s ease-in-out infinite alternate;
}

@keyframes logoFloat {
  0% { transform: translateY(0) scale(1); }
  100% { transform: translateY(-8px) scale(1.02); }
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 8vw, 5rem);
  font-weight: 900;
  letter-spacing: 8px;
  color: var(--text-primary);
  text-shadow:
    0 0 20px var(--cyan-glow),
    0 0 60px rgba(57, 220, 255, 0.15);
  margin-bottom: 16px;
}

.hero-tagline {
  font-size: clamp(1rem, 2.5vw, 1.3rem);
  color: var(--text-secondary);
  max-width: 520px;
  margin: 0 auto 40px;
  font-weight: 500;
  line-height: 1.7;
}


/* --- Store Buttons --- */
.cta-buttons {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.store-btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 14px 32px;
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--text-primary);
  font-family: var(--font-body);
  transition: var(--transition);
  border: 1px solid transparent;
}

.store-btn .store-icon {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
}

.store-btn .store-text {
  display: flex;
  flex-direction: column;
  text-align: left;
}

.store-btn .store-label {
  font-size: 10px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  opacity: 0.8;
  font-weight: 600;
}

.store-btn .store-name {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.2;
}

.android-btn {
  background: linear-gradient(135deg, #1a8fa8 0%, #0d6b7e 100%);
  border-color: var(--cyan-dim);
  box-shadow:
    0 4px 24px rgba(57, 220, 255, 0.2),
    inset 0 1px 0 rgba(255,255,255,0.08);
}

.android-btn:hover {
  transform: translateY(-3px);
  box-shadow:
    0 8px 40px rgba(57, 220, 255, 0.35),
    inset 0 1px 0 rgba(255,255,255,0.12);
  border-color: rgba(57, 220, 255, 0.4);
}

.ios-btn {
  position: relative;
  background: linear-gradient(135deg, #1a1e2e 0%, #12162a 100%);
  border-color: rgba(255, 255, 255, 0.06);
  cursor: default;
  opacity: 0.65;
}

.ios-btn .store-icon,
.ios-btn .store-text {
  opacity: 0.7;
}

.soon-badge {
  position: absolute;
  top: -8px;
  right: -8px;
  background: linear-gradient(135deg, var(--orange) 0%, #e06820 100%);
  color: #fff;
  font-family: var(--font-display);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: 20px;
  box-shadow: 0 2px 12px var(--orange-glow);
  animation: badgePulse 2.5s ease-in-out infinite alternate;
}

@keyframes badgePulse {
  0% { box-shadow: 0 2px 8px var(--orange-glow); }
  100% { box-shadow: 0 2px 20px rgba(255, 140, 50, 0.5); }
}

.store-btn.large {
  padding: 18px 40px;
}

.store-btn.large .store-icon {
  width: 32px;
  height: 32px;
}

.store-btn.large .store-name {
  font-size: 20px;
}


/* --- Scroll Indicator --- */
.scroll-indicator {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
}

.scroll-arrow {
  width: 24px;
  height: 24px;
  border-right: 2px solid var(--text-muted);
  border-bottom: 2px solid var(--text-muted);
  transform: rotate(45deg);
  animation: scrollBounce 2s ease-in-out infinite;
}

@keyframes scrollBounce {
  0%, 100% { transform: rotate(45deg) translateY(0); opacity: 0.4; }
  50% { transform: rotate(45deg) translateY(8px); opacity: 0.8; }
}


/* ========================================
   FEATURES SECTION
   ======================================== */
.features {
  padding: 100px 0;
  background: var(--bg-deep);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  font-weight: 800;
  text-align: center;
  margin-bottom: 60px;
  color: var(--text-primary);
  letter-spacing: 2px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid rgba(57, 220, 255, 0.06);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  text-align: center;
  transition: var(--transition);
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: rgba(57, 220, 255, 0.15);
  box-shadow: 0 8px 40px rgba(57, 220, 255, 0.08);
}

.feature-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 20px;
  color: var(--cyan);
  opacity: 0.85;
}

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

.feature-card h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-primary);
  letter-spacing: 0.5px;
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}


/* ========================================
   SHOWCASE SECTION
   ======================================== */
.showcase {
  padding: 80px 0 100px;
  background: var(--bg-surface);
}

.showcase-visual {
  position: relative;
  max-width: 600px;
  margin: 0 auto;
}

.showcase-image {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  display: block;
  box-shadow: 0 16px 80px rgba(0, 0, 0, 0.5);
}

.showcase-glow {
  position: absolute;
  inset: -20px;
  border-radius: var(--radius-lg);
  background: radial-gradient(ellipse at center, var(--cyan-dim) 0%, transparent 70%);
  z-index: -1;
  opacity: 0.5;
  animation: glowPulse 4s ease-in-out infinite alternate;
}

@keyframes glowPulse {
  0% { opacity: 0.3; }
  100% { opacity: 0.6; }
}


/* ========================================
   DOWNLOAD CTA SECTION
   ======================================== */
.download-cta {
  padding: 100px 0;
  background: var(--bg-deep);
  text-align: center;
  position: relative;
}

.download-cta::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 200px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan-dim), transparent);
}

.cta-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 900;
  margin-bottom: 16px;
  letter-spacing: 3px;
}

.cta-subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 40px;
  max-width: 400px;
  margin-left: auto;
  margin-right: auto;
}


/* ========================================
   FOOTER
   ======================================== */
.footer {
  padding: 32px 0;
  background: var(--bg-surface);
  text-align: center;
  border-top: 1px solid rgba(57, 220, 255, 0.04);
}

.footer p {
  font-size: 0.8rem;
  color: var(--text-muted);
  letter-spacing: 0.5px;
}


/* ========================================
   SCROLL-REVEAL ANIMATION
   ======================================== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}


/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 768px) {
  .hero-logo {
    width: 120px;
    height: 120px;
    border-radius: 24px;
  }

  .hero-title {
    letter-spacing: 4px;
  }

  .features {
    padding: 60px 0;
  }

  .section-title {
    margin-bottom: 40px;
  }

  .feature-card {
    padding: 28px 20px;
  }

  .showcase {
    padding: 60px 0;
  }

  .download-cta {
    padding: 60px 0;
  }
}

@media (max-width: 480px) {
  .store-btn {
    padding: 12px 24px;
  }

  .store-btn .store-name {
    font-size: 16px;
  }

  .store-btn.large {
    padding: 14px 28px;
  }

  .store-btn.large .store-name {
    font-size: 18px;
  }
}