/* ============================================
   QUI AI — Base Styles & Typography
   Space Grotesk + DM Sans + JetBrains Mono
   ============================================ */

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text-primary);
  background-color: var(--color-bg);
  line-height: var(--leading-normal);
  background-image: var(--gradient-mesh);
  background-attachment: fixed;
}

/* --- Headings --- */
h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--color-text-primary);
}

h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: var(--leading-snug);
  color: var(--color-text-primary);
}

h1 { font-size: var(--text-hero); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }

p {
  color: var(--color-text-secondary);
  line-height: var(--leading-loose);
  font-size: var(--text-md);
}

/* --- Gradient Text --- */
.text-gradient {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* --- Mono label (JetBrains Mono) --- */
.font-mono {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.02em;
}

/* --- Eyebrow Labels --- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: var(--tracking-widest);
  text-transform: uppercase;
  color: var(--color-accent-2);
  margin-bottom: var(--space-4);
}
.eyebrow::before {
  content: '';
  display: inline-block;
  width: 20px;
  height: 1px;
  background: var(--color-accent-2);
}

/* --- Blue Divider --- */
.divider {
  width: 60px;
  height: 1px;
  background: var(--gradient-primary);
  margin: var(--space-6) 0;
  position: relative;
}
.divider::after {
  content: '';
  position: absolute;
  inset: -1px;
  background: var(--gradient-primary);
  filter: blur(4px);
  opacity: 0.5;
}
.divider--center { margin: var(--space-6) auto; }

/* --- Section Wrappers --- */
.section {
  padding: var(--space-24) var(--gutter);
  position: relative;
}
.section--dark {
  background: var(--color-bg-2);
}
.section--surface {
  background: rgba(255,255,255,0.02);
  border-top: 1px solid var(--color-border-light);
  border-bottom: 1px solid var(--color-border-light);
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  width: 100%;
}
.container--narrow {
  max-width: var(--max-width-narrow);
  margin: 0 auto;
}

/* --- Utility --- */
.text-center { text-align: center; }
.text-blue   { color: var(--color-accent); }
.text-cyan   { color: var(--color-accent-2); }

/* --- Reveal Animations (multi-direction) --- */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition:
    opacity var(--duration-slower) var(--ease-out),
    transform var(--duration-slower) var(--ease-out);
}
.reveal-left {
  opacity: 0;
  transform: translateX(-40px);
  transition:
    opacity var(--duration-slower) var(--ease-out),
    transform var(--duration-slower) var(--ease-out);
}
.reveal-right {
  opacity: 0;
  transform: translateX(40px);
  transition:
    opacity var(--duration-slower) var(--ease-out),
    transform var(--duration-slower) var(--ease-out);
}
.reveal-scale {
  opacity: 0;
  transform: scale(0.9);
  transition:
    opacity var(--duration-slower) var(--ease-out),
    transform var(--duration-slower) var(--ease-spring);
}

.reveal.is-visible,
.reveal-left.is-visible,
.reveal-right.is-visible,
.reveal-scale.is-visible {
  opacity: 1;
  transform: none;
}

.reveal-delay-1 { transition-delay: 80ms; }
.reveal-delay-2 { transition-delay: 160ms; }
.reveal-delay-3 { transition-delay: 240ms; }
.reveal-delay-4 { transition-delay: 320ms; }
.reveal-delay-5 { transition-delay: 400ms; }

/* --- Selection --- */
::selection {
  background: rgba(59,130,246,0.3);
  color: var(--color-text-primary);
}

/* --- Focus --- */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* --- Scrollbar (WebKit) --- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--color-bg); }
::-webkit-scrollbar-thumb {
  background: rgba(59,130,246,0.3);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover { background: var(--color-accent); }

/* --- Floating Orbs (animated background blobs) --- */
.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  opacity: 0.35;
  animation: orb-float 8s ease-in-out infinite;
  z-index: 0;
}
.orb--blue  { background: radial-gradient(circle, #3B82F6, transparent); }
.orb--cyan  { background: radial-gradient(circle, #06B6D4, transparent); animation-delay: -3s; animation-duration: 10s; }
.orb--violet{ background: radial-gradient(circle, #8B5CF6, transparent); animation-delay: -6s; animation-duration: 12s; }

@keyframes orb-float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33%       { transform: translate(30px, -20px) scale(1.05); }
  66%       { transform: translate(-20px, 15px) scale(0.97); }
}

/* --- Grid Line Background --- */
.grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(59,130,246,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59,130,246,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 0;
}

/* --- Glow line at top of dark sections --- */
.glow-line {
  position: absolute;
  top: 0; left: 10%; right: 10%;
  height: 1px;
  background: var(--gradient-primary);
  opacity: 0.6;
}
.glow-line::after {
  content: '';
  position: absolute;
  inset: -2px;
  background: var(--gradient-primary);
  filter: blur(6px);
  opacity: 0.4;
}

@media (max-width: 768px) {
  h2 { font-size: var(--text-2xl); }
  h3 { font-size: var(--text-xl); }
  .section { padding: var(--space-16) var(--gutter); }
}