/* ==========================================================================
   Common Styles - lunarnetlogicbyte.com
   Tesla-inspired, computer-science aesthetic, rich animations
   ========================================================================== */

:root {
  --color-bg: #05070d;
  --color-bg-alt: #0a0e1a;
  --color-bg-card: #0d1220;
  --color-bg-glass: rgba(13, 18, 32, 0.6);
  --color-border: rgba(120, 168, 255, 0.12);
  --color-border-strong: rgba(120, 168, 255, 0.25);
  --color-text: #e6e9ef;
  --color-text-dim: #8a93a6;
  --color-text-mute: #5b6478;
  --color-accent: #78a8ff;
  --color-accent-2: #a78bfa;
  --color-accent-3: #5eead4;
  --color-accent-warm: #fb923c;
  --color-glow: rgba(120, 168, 255, 0.45);

  --gradient-primary: linear-gradient(135deg, #78a8ff 0%, #a78bfa 50%, #5eead4 100%);
  --gradient-text: linear-gradient(135deg, #ffffff 0%, #a3b8e0 100%);
  --gradient-mesh: radial-gradient(at 20% 20%, rgba(120, 168, 255, 0.18) 0px, transparent 50%),
                   radial-gradient(at 80% 0%, rgba(167, 139, 250, 0.15) 0px, transparent 50%),
                   radial-gradient(at 0% 80%, rgba(94, 234, 212, 0.10) 0px, transparent 50%),
                   radial-gradient(at 80% 80%, rgba(251, 146, 60, 0.08) 0px, transparent 50%);

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;

  --shadow-soft: 0 10px 40px -10px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 40px rgba(120, 168, 255, 0.25);
  --shadow-card: 0 8px 32px rgba(5, 7, 13, 0.6);

  --easing: cubic-bezier(0.22, 1, 0.36, 1);
  --easing-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
  --transition-fast: 200ms var(--easing);
  --transition-base: 400ms var(--easing);
  --transition-slow: 800ms var(--easing);

  --container-max: 1280px;
  --container-pad: clamp(20px, 4vw, 48px);

  --header-height: 76px;
}

body {
  background-image: var(--gradient-mesh);
  background-attachment: fixed;
  background-size: 100% 100%;
}

/* ====================== Layout ====================== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
}

.section {
  position: relative;
  padding: clamp(80px, 10vw, 140px) 0;
}

.section-header {
  text-align: center;
  max-width: 820px;
  margin: 0 auto clamp(48px, 6vw, 80px);
}

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 18px;
  border: 1px solid var(--color-border-strong);
  border-radius: 100px;
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-accent);
  background: rgba(120, 168, 255, 0.06);
  backdrop-filter: blur(8px);
  margin-bottom: 24px;
}

.section-eyebrow::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 12px var(--color-accent);
  animation: pulse 2s ease-in-out infinite;
}

.section-title {
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 700;
  margin-bottom: 20px;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.03em;
}

.section-subtitle {
  font-size: clamp(16px, 1.6vw, 19px);
  color: var(--color-text-dim);
  max-width: 680px;
  margin: 0 auto;
}

.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.mono {
  font-family: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
}

/* ====================== Buttons ====================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: 100px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: transform var(--transition-base), box-shadow var(--transition-base),
              background var(--transition-base), border-color var(--transition-base);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-primary);
  color: #05070d;
  box-shadow: 0 8px 30px rgba(120, 168, 255, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 50px rgba(120, 168, 255, 0.55);
}

.btn-primary::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
  transition: left 0.6s ease;
}

.btn-primary:hover::after {
  left: 100%;
}

.btn-ghost {
  background: rgba(120, 168, 255, 0.06);
  border: 1px solid var(--color-border-strong);
  color: var(--color-text);
  backdrop-filter: blur(10px);
}

.btn-ghost:hover {
  background: rgba(120, 168, 255, 0.12);
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.btn-arrow {
  transition: transform var(--transition-fast);
}
.btn:hover .btn-arrow {
  transform: translateX(4px);
}

/* ====================== Cards ====================== */
.card {
  position: relative;
  background: var(--color-bg-glass);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: clamp(24px, 3vw, 40px);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  transition: transform var(--transition-base), border-color var(--transition-base),
              box-shadow var(--transition-base);
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, transparent, rgba(120, 168, 255, 0.4), transparent);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity var(--transition-base);
  pointer-events: none;
}

.card:hover {
  transform: translateY(-6px);
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-soft), 0 0 60px rgba(120, 168, 255, 0.15);
}

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

/* ====================== Header ====================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-height);
  display: flex;
  align-items: center;
  background: rgba(5, 7, 13, 0.55);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid transparent;
  transition: background var(--transition-base), border-color var(--transition-base),
              height var(--transition-base);
}

.site-header.scrolled {
  background: rgba(5, 7, 13, 0.85);
  border-bottom-color: var(--color-border);
  height: 64px;
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  gap: 32px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 17px;
  letter-spacing: -0.01em;
}

.brand-logo {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: var(--gradient-primary);
  box-shadow: 0 0 24px rgba(120, 168, 255, 0.4);
  transition: transform var(--transition-base);
}

.brand:hover .brand-logo {
  transform: rotate(8deg) scale(1.05);
}

.brand-name {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-suffix {
  color: var(--color-text-dim);
  font-weight: 500;
  font-size: 14px;
  margin-left: 4px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

.main-nav a {
  position: relative;
  padding: 10px 18px;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--color-text-dim);
  border-radius: 100px;
  transition: color var(--transition-fast), background var(--transition-fast);
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--color-text);
  background: rgba(120, 168, 255, 0.08);
}

.main-nav a.active::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 50%;
  transform: translateX(-50%);
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: var(--color-accent);
  box-shadow: 0 0 8px var(--color-accent);
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 12px;
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid var(--color-border);
  align-items: center;
  justify-content: center;
}

.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-text);
  position: relative;
  transition: background var(--transition-fast);
}

.menu-toggle span::before,
.menu-toggle span::after {
  content: '';
  position: absolute;
  left: 0;
  width: 20px;
  height: 2px;
  background: var(--color-text);
  transition: transform var(--transition-base);
}

.menu-toggle span::before { top: -6px; }
.menu-toggle span::after { top: 6px; }

.menu-toggle.open span { background: transparent; }
.menu-toggle.open span::before { transform: translateY(6px) rotate(45deg); }
.menu-toggle.open span::after { transform: translateY(-6px) rotate(-45deg); }

/* ====================== Footer ====================== */
.site-footer {
  position: relative;
  background: linear-gradient(180deg, #05070d 0%, #02040a 100%);
  border-top: 1px solid var(--color-border);
  padding: 80px 0 32px;
  overflow: hidden;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 60px;
}

.footer-brand p {
  color: var(--color-text-dim);
  margin-top: 20px;
  font-size: 14.5px;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text);
  margin-bottom: 22px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-col h4::before {
  content: '';
  width: 4px;
  height: 12px;
  background: var(--gradient-primary);
  border-radius: 2px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col a {
  color: var(--color-text-dim);
  font-size: 14.5px;
  transition: color var(--transition-fast), padding-left var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.footer-col a::before {
  content: '›';
  opacity: 0;
  transform: translateX(-6px);
  transition: opacity var(--transition-fast), transform var(--transition-fast);
  color: var(--color-accent);
}

.footer-col a:hover {
  color: var(--color-text);
  padding-left: 4px;
}

.footer-col a:hover::before {
  opacity: 1;
  transform: translateX(0);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
  font-size: 13px;
  color: var(--color-text-mute);
}

.footer-bottom a:hover { color: var(--color-text); }

.footer-bottom-links {
  display: flex;
  gap: 24px;
}

.social-links {
  display: flex;
  gap: 10px;
  margin-top: 24px;
}

.social-links a {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  color: var(--color-text-dim);
  transition: color var(--transition-fast), border-color var(--transition-fast),
              transform var(--transition-fast), background var(--transition-fast);
}

.social-links a:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
  transform: translateY(-3px);
  background: rgba(120, 168, 255, 0.08);
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 24px;
}

.contact-info li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 14px;
  color: var(--color-text-dim);
}

.contact-info svg {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  margin-top: 2px;
  color: var(--color-accent);
}

/* ====================== Utilities ====================== */
.fade-up {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.9s var(--easing), transform 0.9s var(--easing);
}

.fade-up.in {
  opacity: 1;
  transform: translateY(0);
}

.stagger > * {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s var(--easing), transform 0.7s var(--easing);
}
.stagger.in > *:nth-child(1) { transition-delay: 0.05s; opacity: 1; transform: translateY(0); }
.stagger.in > *:nth-child(2) { transition-delay: 0.12s; opacity: 1; transform: translateY(0); }
.stagger.in > *:nth-child(3) { transition-delay: 0.19s; opacity: 1; transform: translateY(0); }
.stagger.in > *:nth-child(4) { transition-delay: 0.26s; opacity: 1; transform: translateY(0); }
.stagger.in > *:nth-child(5) { transition-delay: 0.33s; opacity: 1; transform: translateY(0); }
.stagger.in > *:nth-child(6) { transition-delay: 0.40s; opacity: 1; transform: translateY(0); }
.stagger.in > *:nth-child(7) { transition-delay: 0.47s; opacity: 1; transform: translateY(0); }
.stagger.in > *:nth-child(8) { transition-delay: 0.54s; opacity: 1; transform: translateY(0); }

.text-center { text-align: center; }

/* Code-style accents */
.code-snippet {
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 13px;
  background: rgba(5, 7, 13, 0.6);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 12px 16px;
  color: var(--color-text-dim);
}

.code-snippet .key { color: #a78bfa; }
.code-snippet .str { color: #5eead4; }
.code-snippet .num { color: #fb923c; }
.code-snippet .com { color: var(--color-text-mute); font-style: italic; }

/* Cursor blink */
.cursor-blink::after {
  content: '_';
  margin-left: 2px;
  animation: blink 1s steps(1) infinite;
  color: var(--color-accent);
}

@keyframes blink {
  50% { opacity: 0; }
}

/* Hero status badge */
.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 100px;
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 12px;
  background: rgba(94, 234, 212, 0.08);
  border: 1px solid rgba(94, 234, 212, 0.3);
  color: #5eead4;
}

.status-pill .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #5eead4;
  box-shadow: 0 0 8px #5eead4;
  animation: pulse 1.6s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.85); }
}

/* Page hero (sub-pages) */
.page-hero {
  position: relative;
  padding: calc(var(--header-height) + 100px) 0 80px;
  text-align: center;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at top, rgba(120, 168, 255, 0.18) 0%, transparent 60%);
  z-index: -1;
}

.breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 13px;
  color: var(--color-text-mute);
  margin-bottom: 24px;
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
}

.breadcrumb a { color: var(--color-text-dim); }
.breadcrumb a:hover { color: var(--color-accent); }
.breadcrumb .sep { color: var(--color-text-mute); }

/* Responsive */
@media (max-width: 960px) {
  .main-nav,
  .nav-cta .btn { display: none; }
  .menu-toggle { display: inline-flex; }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 600px) {
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
}