/* =============================================
   Download Page — MothPay
   Deep Tech / Terminal / Data-Forward
   全面遵循 design-system.css 的 design token 系统
   ============================================= */

/* ── Hero ── */
.download-hero {
  min-height: 100vh;
  background: var(--bg-base);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: clamp(var(--space-24), 12vw, var(--space-32)) 0 var(--space-20);
}

/* Multi-layer radial gradient backdrop */
.download-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 50% 0%, var(--brand-electric-muted) 0%, transparent 70%),
    radial-gradient(ellipse 40% 30% at 80% 60%, var(--neon-cyan-muted) 0%, transparent 60%);
  pointer-events: none;
}

/* Subtle grid lines — using design token grid variables */
.download-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: var(--grid-size) var(--grid-size);
  pointer-events: none;
}

.download-hero-inner {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}

/* ── Eyebrow badge — mirroring hero-badge from home.css ── */
.download-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--neon-cyan-muted);
  border: 1px solid rgba(0, 229, 255, 0.25);
  border-radius: var(--radius-full);
  padding: 4px var(--space-3) 4px var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: var(--fw-medium);
  color: var(--neon-cyan);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: var(--space-6);
}

.download-eyebrow::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--status-green);
  box-shadow: 0 0 0 3px var(--status-green-muted);
  animation: dl-pulse-dot 2s ease-in-out infinite;
  flex-shrink: 0;
}

@keyframes dl-pulse-dot {
  0%, 100% { box-shadow: 0 0 0 3px var(--status-green-muted); }
  50%       { box-shadow: 0 0 0 6px rgba(0, 200, 83, 0.06); }
}

.download-hero-title {
  font-family: var(--font-heading);
  font-size: clamp(var(--text-4xl), 6vw, var(--text-6xl));
  font-weight: var(--fw-bold);
  line-height: var(--lh-tight);
  color: var(--white);
  margin-bottom: var(--space-6);
  letter-spacing: -0.02em;
}

.download-hero-title span {
  background: linear-gradient(135deg, var(--brand-electric), var(--neon-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.download-hero-desc {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  line-height: var(--lh-relaxed);
  color: var(--white-50);
  max-width: 540px;
  margin: 0 auto var(--space-10);
}

/* ── Download Buttons ── */
.download-btns {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-8);
}

.download-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  background: var(--white-06);
  border: 1px solid var(--border-dark-hi);
  border-radius: var(--radius-lg);
  padding: var(--space-4) var(--space-5);
  text-decoration: none;
  cursor: pointer;
  transition:
    border-color var(--transition-fast),
    background var(--transition-fast),
    box-shadow var(--transition-fast),
    transform var(--transition-fast);
  min-width: 190px;
}

.download-btn:hover {
  border-color: var(--brand-electric);
  background: var(--brand-electric-muted);
  box-shadow: var(--glow-electric);
  transform: translateY(-2px);
}

.download-btn-icon {
  width: 32px;
  height: 32px;
  object-fit: contain;
  flex-shrink: 0;
}

.download-btn-text {
  text-align: left;
}

.download-btn-sub {
  display: block;
  font-family: var(--font-body);
  font-size: var(--text-2xs);
  font-weight: var(--fw-regular);
  color: var(--white-50);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 2px;
}

.download-btn-main {
  display: block;
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--fw-bold);
  color: var(--white);
  line-height: var(--lh-snug);
}

/* ── Social Proof ── */
.download-social-proof {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-5);
  flex-wrap: wrap;
}

.social-proof-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--white-50);
}

.social-proof-rating {
  font-weight: var(--fw-bold);
  color: var(--neon-amber);
  font-size: var(--text-sm);
}

.social-proof-sep {
  width: 1px;
  height: 16px;
  background: var(--border-dark-md);
}

/* ── Features Section ── */
.download-features {
  background: var(--bg-surface);
  padding: var(--space-24) 0;
  border-top: 1px solid var(--border-dark);
}

/* Section title: scoped to download page, consistent with design system heading style */
.download-section-title {
  font-family: var(--font-heading);
  font-size: var(--text-section);
  font-weight: var(--fw-bold);
  color: var(--white);
  margin-bottom: var(--space-12);
  letter-spacing: -0.02em;
  line-height: var(--lh-tight);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

/* ── Feature Card — consistent with .card-data from design-system ── */
.feature-card {
  background: var(--bg-raised);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-md);
  padding: var(--space-8) var(--space-6);
  transition:
    border-color var(--transition-normal),
    box-shadow var(--transition-normal),
    transform var(--transition-normal);
  position: relative;
  overflow: hidden;
}

/* Top accent gradient line on hover */
.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--brand-electric), var(--neon-cyan));
  opacity: 0;
  transition: opacity var(--transition-normal);
}

/* Corner-clip decoration — design system convention */
.feature-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  right: 0;
  width: 12px;
  height: 12px;
  background: var(--neon-cyan);
  clip-path: polygon(100% 0, 100% 100%, 0 100%);
  opacity: 0.25;
}

.feature-card:hover {
  border-color: var(--brand-electric);
  box-shadow: 0 0 0 1px var(--brand-electric-glow);
  transform: translateY(-3px);
}

.feature-card:hover::before {
  opacity: 1;
}

/* ── Feature Card Icon — using .icon-box-lg pattern from design-system ── */
.feature-card-icon {
  width: 48px;
  height: 48px;
  background: var(--brand-electric-muted);
  border: 1px solid rgba(0, 102, 255, 0.25);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-5);
  color: var(--brand-electric);
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.feature-card:hover .feature-card-icon {
  border-color: var(--brand-electric);
  box-shadow: 0 0 12px var(--brand-electric-glow);
}

.feature-card-icon svg {
  width: 22px;
  height: 22px;
  stroke: var(--brand-electric);
}

.feature-card-title {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--fw-bold);
  color: var(--white);
  margin-bottom: var(--space-3);
  letter-spacing: -0.01em;
}

.feature-card-desc {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  line-height: var(--lh-relaxed);
  color: var(--white-50);
}

/* ── Responsive ── */
@media (max-width: 992px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .download-hero {
    padding: var(--space-24) 0 var(--space-16);
  }

  .download-hero-desc {
    font-size: var(--text-base);
  }

  .download-btns {
    flex-direction: column;
    align-items: center;
  }

  .download-btn {
    width: 100%;
    max-width: 280px;
    justify-content: center;
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .download-features {
    padding: var(--space-16) 0;
  }

}

@media (max-width: 480px) {
  .download-hero-title {
    font-size: var(--text-3xl);
  }

  .download-hero-desc {
    font-size: var(--text-sm);
  }
}

@media (max-width: 360px) {
  .download-hero-title {
    font-size: var(--text-2xl);
  }
}