/* ============================================
   ASTROCHARTS — Base Styles v1.0
   Global resets, typography, utilities
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Space+Grotesk:wght@500;600;700&display=swap');

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-base);
  color: var(--text);
  line-height: var(--leading-normal);
  min-height: 100vh;
  overflow-x: hidden;
}

/* ============================================
   COSMIC BACKGROUND — Image + CSS Hybrid
   Cosmos nebula image (AI-upscaled to 4K)
   Responsive: mobile, desktop 1080p, 2K, 4K
   ============================================ */

/* Layer 1: Cosmos nebula image */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -3;
  /* Mobile: lightweight 828x466 version */
  background:
    url('/static/images/bg-cosmos-mobile.webp') center center / cover no-repeat,
    /* CSS gradient fallback if image fails to load */
    radial-gradient(ellipse 55% 45% at 72% 15%, rgba(88, 40, 120, 0.35) 0%, rgba(60, 25, 90, 0.15) 40%, transparent 75%),
    radial-gradient(ellipse 50% 40% at 18% 78%, rgba(30, 50, 100, 0.25) 0%, rgba(20, 35, 75, 0.10) 45%, transparent 70%),
    var(--bg-deep);
  opacity: 0.6;
}

/* Desktop (769px – 1920px): Full HD 1920x1080 */
@media (min-width: 769px) {
  body::before {
    background:
      url('/static/images/bg-cosmos-desktop.webp') center center / cover no-repeat,
      radial-gradient(ellipse 55% 45% at 72% 15%, rgba(88, 40, 120, 0.35) 0%, rgba(60, 25, 90, 0.15) 40%, transparent 75%),
      radial-gradient(ellipse 50% 40% at 18% 78%, rgba(30, 50, 100, 0.25) 0%, rgba(20, 35, 75, 0.10) 45%, transparent 70%),
      var(--bg-deep);
  }
}

/* 2K displays (1921px – 2560px): 2560x1440 */
@media (min-width: 1921px) {
  body::before {
    background:
      url('/static/images/bg-cosmos-2k.webp') center center / cover no-repeat,
      radial-gradient(ellipse 55% 45% at 72% 15%, rgba(88, 40, 120, 0.35) 0%, rgba(60, 25, 90, 0.15) 40%, transparent 75%),
      radial-gradient(ellipse 50% 40% at 18% 78%, rgba(30, 50, 100, 0.25) 0%, rgba(20, 35, 75, 0.10) 45%, transparent 70%),
      var(--bg-deep);
  }
}

/* 4K displays (2561px+): native 4096x2304 */
@media (min-width: 2561px) {
  body::before {
    background:
      url('/static/images/bg-cosmos-4k.webp') center center / cover no-repeat,
      radial-gradient(ellipse 55% 45% at 72% 15%, rgba(88, 40, 120, 0.35) 0%, rgba(60, 25, 90, 0.15) 40%, transparent 75%),
      radial-gradient(ellipse 50% 40% at 18% 78%, rgba(30, 50, 100, 0.25) 0%, rgba(20, 35, 75, 0.10) 45%, transparent 70%),
      var(--bg-deep);
  }
}

/* High-DPI / Retina: serve higher-res image for sharp rendering */
@media (min-width: 769px) and (min-resolution: 2dppx) {
  body::before {
    background:
      url('/static/images/bg-cosmos-2k.webp') center center / cover no-repeat,
      radial-gradient(ellipse 55% 45% at 72% 15%, rgba(88, 40, 120, 0.35) 0%, rgba(60, 25, 90, 0.15) 40%, transparent 75%),
      radial-gradient(ellipse 50% 40% at 18% 78%, rgba(30, 50, 100, 0.25) 0%, rgba(20, 35, 75, 0.10) 45%, transparent 70%),
      var(--bg-deep);
  }
}

/* PNG fallback for browsers without WebP support */
@supports not (background-image: url('data:image/webp;base64,UklGRiQAAABXRUJQVlA4IBgAAAAwAQCdASoBAAEAAkA4JZQCdAEO/hepAAA=')) {
  body::before {
    background:
      url('/static/images/bg-cosmos-fallback.png') center center / cover no-repeat,
      radial-gradient(ellipse 55% 45% at 72% 15%, rgba(88, 40, 120, 0.35) 0%, rgba(60, 25, 90, 0.15) 40%, transparent 75%),
      var(--bg-deep);
  }
}

/* Layer 2: Vignette + depth overlay (enhances text readability) */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    /* Vignette – dark corners for focus */
    radial-gradient(ellipse 75% 65% at 50% 50%, transparent 30%, rgba(5, 5, 12, 0.70) 100%),
    /* Top fade for navbar contrast */
    linear-gradient(180deg, rgba(7,10,18,0.50) 0%, transparent 22%),
    /* Bottom fade for footer contrast */
    linear-gradient(0deg, rgba(7,10,18,0.55) 0%, transparent 25%),
    /* Overall dark tint for text readability */
    linear-gradient(180deg, rgba(10, 10, 26, 0.35) 0%, rgba(7, 10, 18, 0.30) 100%);
  pointer-events: none;
}

/* Layer 3: Starfield via box-shadows on a pseudo-element on html */
html::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  /* Star particles – crisp white dots */
  background-image:
    radial-gradient(1px 1px at 10% 15%, rgba(255,255,255,0.8) 0%, transparent 100%),
    radial-gradient(1px 1px at 25% 35%, rgba(255,255,255,0.6) 0%, transparent 100%),
    radial-gradient(1.5px 1.5px at 45% 8%, rgba(255,255,255,0.9) 0%, transparent 100%),
    radial-gradient(1px 1px at 60% 55%, rgba(255,255,255,0.5) 0%, transparent 100%),
    radial-gradient(1px 1px at 78% 20%, rgba(255,255,255,0.7) 0%, transparent 100%),
    radial-gradient(1.5px 1.5px at 88% 65%, rgba(255,255,255,0.8) 0%, transparent 100%),
    radial-gradient(1px 1px at 35% 72%, rgba(255,255,255,0.6) 0%, transparent 100%),
    radial-gradient(1px 1px at 55% 88%, rgba(255,255,255,0.5) 0%, transparent 100%),
    radial-gradient(1.5px 1.5px at 15% 50%, rgba(255,255,255,0.7) 0%, transparent 100%),
    radial-gradient(1px 1px at 92% 42%, rgba(255,255,255,0.6) 0%, transparent 100%),
    radial-gradient(1px 1px at 5% 85%, rgba(255,255,255,0.5) 0%, transparent 100%),
    radial-gradient(2px 2px at 70% 10%, rgba(200,180,255,0.9) 0%, transparent 100%),
    radial-gradient(1px 1px at 42% 30%, rgba(255,255,255,0.4) 0%, transparent 100%),
    radial-gradient(1px 1px at 82% 80%, rgba(255,255,255,0.6) 0%, transparent 100%),
    radial-gradient(1.5px 1.5px at 20% 92%, rgba(255,255,255,0.5) 0%, transparent 100%),
    radial-gradient(1px 1px at 65% 38%, rgba(255,255,255,0.7) 0%, transparent 100%),
    radial-gradient(2px 2px at 30% 5%, rgba(220,200,255,0.8) 0%, transparent 100%),
    radial-gradient(1px 1px at 50% 65%, rgba(255,255,255,0.4) 0%, transparent 100%),
    radial-gradient(1px 1px at 95% 15%, rgba(255,255,255,0.6) 0%, transparent 100%),
    radial-gradient(1.5px 1.5px at 8% 40%, rgba(255,255,255,0.7) 0%, transparent 100%);
  animation: twinkle 8s ease-in-out infinite alternate;
}

/* Second star layer – offset animation for depth */
html::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background-image:
    radial-gradient(1px 1px at 17% 22%, rgba(255,255,255,0.6) 0%, transparent 100%),
    radial-gradient(1.5px 1.5px at 38% 48%, rgba(255,255,255,0.8) 0%, transparent 100%),
    radial-gradient(1px 1px at 52% 12%, rgba(255,255,255,0.5) 0%, transparent 100%),
    radial-gradient(1px 1px at 72% 75%, rgba(255,255,255,0.7) 0%, transparent 100%),
    radial-gradient(1px 1px at 85% 35%, rgba(255,255,255,0.4) 0%, transparent 100%),
    radial-gradient(1.5px 1.5px at 3% 62%, rgba(255,255,255,0.6) 0%, transparent 100%),
    radial-gradient(1px 1px at 62% 92%, rgba(255,255,255,0.5) 0%, transparent 100%),
    radial-gradient(2px 2px at 48% 5%, rgba(180,160,255,0.7) 0%, transparent 100%),
    radial-gradient(1px 1px at 28% 58%, rgba(255,255,255,0.6) 0%, transparent 100%),
    radial-gradient(1px 1px at 75% 48%, rgba(255,255,255,0.5) 0%, transparent 100%),
    radial-gradient(1.5px 1.5px at 90% 88%, rgba(255,255,255,0.7) 0%, transparent 100%),
    radial-gradient(1px 1px at 12% 75%, rgba(255,255,255,0.4) 0%, transparent 100%),
    radial-gradient(1px 1px at 58% 28%, rgba(255,255,255,0.6) 0%, transparent 100%),
    radial-gradient(1px 1px at 33% 95%, rgba(255,255,255,0.5) 0%, transparent 100%),
    radial-gradient(2px 2px at 83% 8%, rgba(200,190,255,0.8) 0%, transparent 100%);
  animation: twinkle 10s ease-in-out 2s infinite alternate;
}

@keyframes twinkle {
  0%   { opacity: 0.7; }
  100% { opacity: 1; }
}

/* ---- Links ---- */
a {
  color: inherit;
  text-decoration: none;
}

/* ---- Images ---- */
img, svg { display: block; max-width: 100%; }

/* ---- Container ---- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* ---- Typography ---- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: var(--weight-bold);
  line-height: var(--leading-tight);
  color: var(--text);
}

h1 { font-size: var(--text-4xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-xl);  }
h4 { font-size: var(--text-lg);  }

p {
  color: var(--text-muted);
  line-height: var(--leading-relaxed);
}

.text-gradient {
  background: linear-gradient(135deg, var(--brand-light) 0%, var(--gold-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-8);
  border-radius: var(--radius-pill);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: var(--weight-semibold);
  border: none;
  cursor: pointer;
  transition: all var(--duration-base) var(--ease-out);
  min-height: var(--touch-min);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--gold-gradient);
  color: var(--text-on-gold);
  box-shadow: var(--gold-glow);
}
.btn-primary:hover {
  box-shadow: 0 0 36px rgba(212, 160, 74, 0.50);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1.5px solid var(--border-light);
}
.btn-outline:hover {
  border-color: var(--brand);
  background: rgba(124, 92, 255, 0.08);
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  padding: var(--space-2) var(--space-4);
}
.btn-ghost:hover {
  color: var(--text);
}

/* ---- Glass Card ---- */
.glass-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  padding: var(--space-8);
  transition: all var(--duration-base) var(--ease-out);
  box-shadow: inset 0 0 0 0 transparent, 0 2px 12px rgba(0, 0, 0, 0.25);
}
.glass-card:hover {
  border-color: rgba(123, 63, 190, 0.40);
  box-shadow: var(--shadow-glow), 0 4px 20px rgba(0, 0, 0, 0.30);
  transform: translateY(-2px);
}

/* ---- Badge ---- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-pill);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
}
.badge-credit {
  color: var(--green);
  background: rgba(74, 222, 128, 0.10);
}
.badge-brand {
  color: var(--brand-light);
  background: rgba(124, 92, 255, 0.12);
}

/* ---- Section spacing ---- */
.section {
  padding: var(--space-24) 0;
}
.section-title {
  text-align: center;
  margin-bottom: var(--space-12);
}
.section-title h2 {
  margin-bottom: var(--space-4);
}
.section-title p {
  max-width: 560px;
  margin: 0 auto;
}

/* ---- Grid utilities ---- */
.grid {
  display: grid;
  gap: var(--space-6);
}
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ---- Flex utilities ---- */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

/* ---- Text utilities ---- */
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.text-subtle { color: var(--text-subtle); }
.text-sm { font-size: var(--text-sm); }
.text-xs { font-size: var(--text-xs); }
.text-lg { font-size: var(--text-lg); }

/* ---- Stars Rating ---- */
.stars {
  display: inline-flex;
  gap: 2px;
  color: #FFD700;
  font-size: var(--text-sm);
}

/* ---- Icon Container ---- */
.icon-box {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  font-size: var(--text-xl);
  background: rgba(124, 92, 255, 0.12);
  color: var(--brand-light);
  margin-bottom: var(--space-4);
}

/* ---- Responsive ---- */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  h1 { font-size: var(--text-3xl); }
}
@media (max-width: 768px) {
  .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
  h1 { font-size: var(--text-2xl); }
  h2 { font-size: var(--text-2xl); }
  .container { padding: 0 var(--space-4); }
  .section { padding: var(--space-16) 0; }
  .hero-grid { grid-template-columns: 1fr !important; }
  .hero-visual { display: none; }
  .chat-section-grid { grid-template-columns: 1fr !important; }
  .chat-phones { display: none; }
}

/* ---- Animations ---- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-8px); }
}
@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 20px rgba(124, 92, 255, 0.15); }
  50%      { box-shadow: 0 0 40px rgba(124, 92, 255, 0.30); }
}

.animate-fade-in {
  animation: fadeInUp 0.6s var(--ease-out) forwards;
  opacity: 0;
}
.animate-float {
  animation: float 4s ease-in-out infinite;
}
.animate-delay-1 { animation-delay: 0.1s; }
.animate-delay-2 { animation-delay: 0.2s; }
.animate-delay-3 { animation-delay: 0.3s; }
.animate-delay-4 { animation-delay: 0.4s; }