/* ============================================
   GLOBAL — Background, Grid, Ambient Light
   ============================================ */

body {
  font-family: var(--font-body);
  background: var(--bg-deepest);
  color: var(--text-primary);
  position: relative;
}

/* ── Animated Grid Background ── */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(0, 163, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 163, 255, 0.035) 1px, transparent 1px);
  background-size: 60px 60px;
  animation: grid-pulse 8s ease-in-out infinite;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, black 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, black 20%, transparent 70%);
}

/* ── Noise Texture Overlay ── */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.025;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='1'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 256px 256px;
}

/* ── Mouse-reactive spotlight ── */
.cursor-spotlight {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: radial-gradient(
    600px circle at var(--cursor-x) var(--cursor-y),
    rgba(0, 163, 255, 0.06),
    transparent 60%
  );
  transition: opacity 0.3s;
}

/* ── Particle Canvas ── */
#particle-canvas {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
}

/* ── Ambient glow orbs ── */
.ambient-glow {
  position: fixed;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
  filter: blur(100px);
}

.ambient-glow--1 {
  width: 600px;
  height: 600px;
  top: -200px;
  right: -100px;
  background: radial-gradient(circle, rgba(0, 163, 255, 0.12) 0%, transparent 70%);
  animation: glow-breathe 10s ease-in-out infinite;
}

.ambient-glow--2 {
  width: 800px;
  height: 800px;
  bottom: 20%;
  left: -300px;
  background: radial-gradient(circle, rgba(0, 102, 255, 0.08) 0%, transparent 70%);
  animation: glow-breathe 14s ease-in-out infinite 3s;
}

.ambient-glow--3 {
  width: 500px;
  height: 500px;
  top: 50%;
  right: -200px;
  background: radial-gradient(circle, rgba(108, 92, 231, 0.06) 0%, transparent 70%);
  animation: glow-breathe 12s ease-in-out infinite 6s;
}

/* ── Section base ── */
.section {
  position: relative;
  z-index: 2;
  padding: var(--space-32) var(--space-6);
  overflow: hidden;
}

.section__inner {
  max-width: 1400px;
  margin: 0 auto;
  position: relative;
}

/* ── Section label ── */
.section-label {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--blue-electric);
  margin-bottom: var(--space-6);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.section-label::before {
  content: '';
  width: 8px;
  height: 8px;
  background: var(--blue-electric);
  border-radius: 50%;
  box-shadow: 0 0 12px rgba(0, 163, 255, 0.6);
  animation: pulse-glow 3s ease-in-out infinite;
}

.section-label svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

/* ── Section headline ── */
.section-headline {
  font-family: var(--font-display);
  font-size: var(--text-5xl);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: var(--space-6);
}

.section-headline span {
  background: linear-gradient(135deg, var(--blue-electric), var(--blue-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── Section description ── */
.section-desc {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  max-width: 560px;
  line-height: 1.7;
}

/* ── Glass Card ── */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  position: relative;
  overflow: hidden;
  transition: 
    background var(--duration-normal) var(--ease-out),
    border-color var(--duration-normal) var(--ease-out),
    box-shadow var(--duration-normal) var(--ease-out),
    transform var(--duration-normal) var(--ease-out);
}

.glass-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 60%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.03),
    transparent
  );
  transition: left 0.6s var(--ease-out);
  pointer-events: none;
}

.glass-card:hover {
  background: var(--glass-bg-hover);
  border-color: var(--glass-border-hover);
  box-shadow: var(--shadow-lg);
}

.glass-card:hover::before {
  left: 100%;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--text-sm);
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-full);
  position: relative;
  overflow: hidden;
  contain: paint;
  transition: all var(--duration-normal) var(--ease-out);
  cursor: pointer;
  z-index: 1;
}

.btn--primary {
  background: linear-gradient(135deg, var(--blue-azure), var(--blue-electric));
  color: var(--text-primary);
  box-shadow: 0 0 20px rgba(0, 163, 255, 0.3), 0 4px 12px rgba(0, 0, 0, 0.3);
}

.btn--primary:hover {
  box-shadow: 0 0 30px rgba(0, 163, 255, 0.5), 0 6px 20px rgba(0, 0, 0, 0.4);
  transform: translateY(-2px);
}

.btn--primary::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent, rgba(255, 255, 255, 0.15));
  opacity: 0;
  transition: opacity var(--duration-normal);
  pointer-events: none;
}

.btn--primary:hover::after {
  opacity: 1;
}

.btn--ghost {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
}

.btn--ghost:hover {
  background: var(--glass-bg-hover);
  border-color: var(--glass-border-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn--large {
  padding: var(--space-5) var(--space-10);
  font-size: var(--text-base);
}

.btn .arrow {
  transition: transform var(--duration-normal) var(--ease-out);
}

.btn:hover .arrow {
  transform: translateX(4px);
}


/* ── Divider ── */
.section-divider {
  position: relative;
  height: 200px;
  z-index: 2;
  overflow: hidden;
}

.section-divider::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--blue-electric), transparent);
  opacity: 0.3;
}

.section-divider::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 8px;
  height: 8px;
  background: var(--blue-electric);
  border-radius: 50%;
  box-shadow: 0 0 20px rgba(0, 163, 255, 0.6);
}

/* ── Responsive ── */
@media (max-width: 1024px) {
  .section {
    padding: var(--space-20) var(--space-6);
  }
}

@media (max-width: 768px) {
  .section {
    padding: var(--space-16) var(--space-4);
  }

  .section-divider {
    height: 120px;
  }
}

@media (max-width: 480px) {
  .section-divider {
    height: 80px;
  }
}