/* ============================================================
   EYES ON THE SKY — Global Design System
   Premium dark space theme with glassmorphism
   ============================================================ */

/* ── Google Fonts Import ──────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800;900&family=Inter:wght@300;400;500;600;700&family=Space+Mono:wght@400;700&display=swap');

/* ── CSS Custom Properties ────────────────────────────────── */
:root {
  /* Colors — Pure black space theme */
  --bg-primary: #000000;
  --bg-secondary: #050508;
  --bg-tertiary: #0a0a0f;
  --bg-card: rgba(5, 5, 10, 0.7);
  --bg-glass: rgba(255, 255, 255, 0.03);
  --bg-glass-hover: rgba(255, 255, 255, 0.06);

  --text-primary: #f0f0ff;
  --text-secondary: #a0a0c8;
  --text-muted: #6a6a90;

  --accent-purple: #7c3aed;
  --accent-blue: #3b82f6;
  --accent-pink: #ec4899;
  --accent-cyan: #06b6d4;
  --accent-orange: #f97316;
  --accent-green: #10b981;

  --gradient-primary: linear-gradient(135deg, #7c3aed, #3b82f6);
  --gradient-warm: linear-gradient(135deg, #f97316, #ec4899);
  --gradient-cool: linear-gradient(135deg, #06b6d4, #3b82f6);
  --gradient-nebula: linear-gradient(135deg, #7c3aed, #ec4899, #f97316);

  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-glow: rgba(124, 58, 237, 0.3);

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 30px rgba(124, 58, 237, 0.15);

  /* Typography */
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'Space Mono', monospace;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 50%;

  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}

a {
  text-decoration: none;
  color: inherit;
}

img {
  max-width: 100%;
  display: block;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
  color: inherit;
}

ul, ol {
  list-style: none;
}

/* ── Typography ───────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 800;
  text-align: center;
  margin-bottom: var(--space-md);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  text-align: center;
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto var(--space-3xl);
}

/* ── Layout ───────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

section {
  padding: var(--space-4xl) 0;
  position: relative;
}

/* ── Glassmorphism Card ───────────────────────────────────── */
.glass-card {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: all var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.glass-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
}

.glass-card:hover {
  background: var(--bg-glass-hover);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-glow);
  transform: translateY(-4px);
}

/* ── Buttons ──────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 2rem;
  border-radius: var(--radius-xl);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1rem;
  transition: all var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: 0 4px 15px rgba(124, 58, 237, 0.4);
}

.btn-primary:hover {
  box-shadow: 0 6px 25px rgba(124, 58, 237, 0.6);
  transform: translateY(-2px);
}

.btn-primary::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.2), transparent);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

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

.btn-outline {
  border: 1px solid var(--border-glow);
  color: var(--accent-purple);
  background: transparent;
}

.btn-outline:hover {
  background: rgba(124, 58, 237, 0.1);
  border-color: var(--accent-purple);
}

/* ── Pulse Animation ──────────────────────────────────────── */
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(124, 58, 237, 0.4); }
  50% { box-shadow: 0 0 0 15px rgba(124, 58, 237, 0); }
}

.pulse {
  animation: pulse 2s infinite;
}

/* ── Star / Particle Background ───────────────────────────── */
.stars-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  pointer-events: none;
}

/* ── Floating animation ──────────────────────────────────── */
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.float {
  animation: float 3s ease-in-out infinite;
}

/* ── Glow text ────────────────────────────────────────────── */
.glow-text {
  text-shadow: 0 0 10px rgba(124, 58, 237, 0.5), 0 0 40px rgba(124, 58, 237, 0.2);
}

/* ── Navbar ───────────────────────────────────────────────── */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--space-md) 0;
  transition: all var(--transition-smooth);
}

.navbar.scrolled {
  background: rgba(5, 5, 16, 0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-logo span {
  font-size: 1.6rem;
}

.nav-logo-img {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  filter: drop-shadow(0 0 8px rgba(124, 58, 237, 0.4));
}

.nav-logo-text {
  font-family: var(--font-heading);
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-size: 1.2rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color var(--transition-fast);
  position: relative;
}

.nav-links a:hover {
  color: var(--text-primary);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: width var(--transition-smooth);
}

.nav-links a:hover::after {
  width: 100%;
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: all var(--transition-fast);
  border-radius: 2px;
}

/* ── Tag / Badge ──────────────────────────────────────────── */
.tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-xl);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.tag-planet { background: rgba(59, 130, 246, 0.15); color: var(--accent-blue); }
.tag-star { background: rgba(249, 115, 22, 0.15); color: var(--accent-orange); }
.tag-moon { background: rgba(107, 114, 128, 0.15); color: #9ca3af; }
.tag-nebula { background: rgba(236, 72, 153, 0.15); color: var(--accent-pink); }
.tag-galaxy { background: rgba(124, 58, 237, 0.15); color: var(--accent-purple); }
.tag-dwarf { background: rgba(16, 185, 129, 0.15); color: var(--accent-green); }
.tag-comet { background: rgba(6, 182, 212, 0.15); color: var(--accent-cyan); }
.tag-other { background: rgba(255, 255, 255, 0.08); color: var(--text-secondary); }

/* ── Footer ───────────────────────────────────────────────── */
.footer {
  padding: var(--space-3xl) 0 var(--space-xl);
  border-top: 1px solid var(--border-subtle);
  background: var(--bg-secondary);
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-3xl);
  margin-bottom: var(--space-3xl);
}

.footer-brand h3 {
  font-size: 1.5rem;
  margin-bottom: var(--space-md);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.7;
}

.footer-links h4 {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
}

.footer-links a {
  display: block;
  color: var(--text-muted);
  font-size: 0.9rem;
  padding: 0.3rem 0;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--accent-purple);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-xl);
  border-top: 1px solid var(--border-subtle);
  color: var(--text-muted);
  font-size: 0.85rem;
}

.footer-bottom a {
  color: var(--accent-purple);
}

/* ── Scrollbar ────────────────────────────────────────────── */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: rgba(124, 58, 237, 0.3);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(124, 58, 237, 0.5);
}

/* ── Selection ────────────────────────────────────────────── */
::selection {
  background: rgba(124, 58, 237, 0.3);
  color: white;
}

/* ── Loading Spinner ──────────────────────────────────────── */
@keyframes spin {
  to { transform: rotate(360deg); }
}

.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--border-subtle);
  border-top-color: var(--accent-purple);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 1024px) {
  .footer-content {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .container {
    padding: 0 var(--space-md);
  }

  section {
    padding: var(--space-3xl) 0;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: rgba(5, 5, 16, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 5rem 2rem 2rem;
    gap: var(--space-xl);
    transition: right var(--transition-smooth);
    border-left: 1px solid var(--border-subtle);
  }

  .nav-links.active {
    right: 0;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }
}

@media (max-width: 480px) {
  .btn {
    padding: 0.75rem 1.5rem;
    font-size: 0.9rem;
  }
}