/* AstroStackerPro — global styles */

:root {
  --bg-base: #000000;
  --bg-deep: #0a0418;
  --bg-night: #1a0a30;
  --accent-cyan: #00d4ff;
  --accent-violet: #7b61ff;
  --star-gold: #ffe8b0;
  --galaxy-pink: #ff60a0;

  --fg: rgba(255, 255, 255, 0.92);
  --fg-muted: rgba(235, 230, 255, 0.62);
  --fg-faint: rgba(235, 230, 255, 0.42);

  --glass-bg: rgba(255, 255, 255, 0.04);
  --glass-bg-strong: rgba(255, 255, 255, 0.06);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-border-strong: rgba(255, 255, 255, 0.16);

  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 22px;
  --radius-xl: 32px;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'SF Pro Display',
    'SF Pro Text', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

  --content-max: 1200px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg-base);
  color: var(--fg);
  font-family: var(--font-sans);
  font-feature-settings: 'cv02', 'cv03', 'cv04', 'cv11';
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-size: 16px;
  line-height: 1.55;
  overflow-x: hidden;
}

body {
  min-height: 100vh;
  position: relative;
}

/* Background — atmospheric night sky with subtle Milky Way */
.cosmos {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  overflow: hidden;
  background:
    radial-gradient(
      ellipse 80% 50% at 70% 20%,
      rgba(123, 97, 255, 0.18),
      transparent 60%
    ),
    radial-gradient(
      ellipse 60% 40% at 20% 80%,
      rgba(0, 120, 180, 0.12),
      transparent 60%
    ),
    radial-gradient(
      ellipse 100% 60% at 50% 100%,
      rgba(26, 10, 48, 0.9),
      transparent 70%
    ),
    linear-gradient(180deg, #000000 0%, #050217 50%, #0a0420 100%);
}

.cosmos::before {
  /* Milky Way diagonal soft band */
  content: '';
  position: absolute;
  top: -20%;
  left: -10%;
  right: -10%;
  bottom: -20%;
  background:
    radial-gradient(
      ellipse 70% 18% at 50% 50%,
      rgba(255, 232, 176, 0.06),
      transparent 70%
    ),
    radial-gradient(
      ellipse 55% 12% at 50% 50%,
      rgba(255, 96, 160, 0.05),
      transparent 70%
    ),
    radial-gradient(
      ellipse 50% 8% at 50% 50%,
      rgba(123, 97, 255, 0.08),
      transparent 70%
    );
  transform: rotate(-22deg);
  filter: blur(40px);
  opacity: 0.85;
}

.cosmos::after {
  /* stars layer — generated via box-shadows in pseudo */
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(1px 1px at 12% 18%, rgba(255, 255, 255, 0.9), transparent 50%),
    radial-gradient(1px 1px at 27% 64%, rgba(255, 255, 255, 0.7), transparent 50%),
    radial-gradient(1.5px 1.5px at 41% 31%, rgba(255, 232, 176, 0.85), transparent 50%),
    radial-gradient(1px 1px at 56% 12%, rgba(255, 255, 255, 0.6), transparent 50%),
    radial-gradient(1px 1px at 64% 78%, rgba(255, 255, 255, 0.85), transparent 50%),
    radial-gradient(1px 1px at 73% 44%, rgba(200, 220, 255, 0.7), transparent 50%),
    radial-gradient(1.5px 1.5px at 82% 19%, rgba(255, 232, 176, 0.9), transparent 50%),
    radial-gradient(1px 1px at 88% 71%, rgba(255, 255, 255, 0.7), transparent 50%),
    radial-gradient(1px 1px at 8% 89%, rgba(255, 255, 255, 0.6), transparent 50%),
    radial-gradient(1px 1px at 35% 92%, rgba(200, 220, 255, 0.6), transparent 50%),
    radial-gradient(1px 1px at 49% 53%, rgba(255, 255, 255, 0.5), transparent 50%),
    radial-gradient(1px 1px at 92% 38%, rgba(255, 255, 255, 0.6), transparent 50%),
    radial-gradient(1px 1px at 5% 45%, rgba(255, 255, 255, 0.5), transparent 50%),
    radial-gradient(1px 1px at 19% 7%, rgba(255, 255, 255, 0.6), transparent 50%),
    radial-gradient(1.2px 1.2px at 76% 86%, rgba(255, 232, 176, 0.7), transparent 50%);
  background-size: 100% 100%;
  opacity: 0.9;
}

/* Layout helpers */
.container {
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 24px;
}

@media (min-width: 768px) {
  .container {
    padding: 0 40px;
  }
}

.section {
  padding: 80px 0;
}

@media (min-width: 768px) {
  .section {
    padding: 120px 0;
  }
}

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent-cyan);
  margin-bottom: 18px;
}

.section-eyebrow::before {
  content: '';
  width: 22px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent-cyan));
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-sans);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--fg);
  margin: 0;
  text-wrap: balance;
}

h1 {
  font-size: clamp(40px, 7vw, 76px);
  line-height: 1.05;
  letter-spacing: -0.035em;
  font-weight: 600;
}

h2 {
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.1;
  letter-spacing: -0.028em;
}

h3 {
  font-size: 18px;
  line-height: 1.3;
  font-weight: 600;
  letter-spacing: -0.01em;
}

p {
  color: var(--fg-muted);
  margin: 0;
  text-wrap: pretty;
}

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

/* Nav */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  background: rgba(0, 0, 0, 0.45);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  letter-spacing: -0.01em;
  font-size: 15px;
}

.brand-mark {
  width: 26px;
  height: 26px;
  border-radius: 8px;
  background:
    radial-gradient(circle at 30% 30%, var(--accent-cyan), transparent 60%),
    radial-gradient(circle at 70% 70%, var(--accent-violet), transparent 60%),
    linear-gradient(135deg, #0c0420, #1a0a30);
  border: 1px solid rgba(255, 255, 255, 0.18);
  box-shadow:
    inset 0 0 8px rgba(255, 255, 255, 0.12),
    0 0 14px rgba(0, 212, 255, 0.25);
  position: relative;
  flex-shrink: 0;
}

.brand-mark::after {
  content: '';
  position: absolute;
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--star-gold);
  top: 6px;
  right: 6px;
  box-shadow: 0 0 6px var(--star-gold);
}

.nav-links {
  display: none;
  align-items: center;
  gap: 28px;
}

@media (min-width: 768px) {
  .nav-links {
    display: flex;
  }
}

.nav-links a {
  font-size: 14px;
  color: var(--fg-muted);
  transition: color 160ms ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--fg);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 36px;
  padding: 0 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-violet));
  color: #060114;
  transition: transform 160ms ease, box-shadow 160ms ease;
  white-space: nowrap;
  flex-shrink: 0;
}

.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(0, 212, 255, 0.25);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  height: 52px;
  padding: 0 22px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: -0.005em;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 180ms ease, box-shadow 180ms ease,
    background 180ms ease, border-color 180ms ease;
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-violet));
  color: #060114;
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.3) inset,
    0 0 0 1px rgba(255, 255, 255, 0.08),
    0 12px 30px -8px rgba(0, 212, 255, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.35) inset,
    0 0 0 1px rgba(255, 255, 255, 0.12),
    0 18px 40px -10px rgba(0, 212, 255, 0.45);
}

.btn-ghost {
  background: var(--glass-bg);
  color: var(--fg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

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

.btn:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 3px;
}

/* Glass card */
.glass {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  position: relative;
  overflow: hidden;
}

.glass::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.06) 0%,
    transparent 40%
  );
  pointer-events: none;
}

/* Footer */
.footer {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 56px 0 40px;
  margin-top: 80px;
  background: linear-gradient(180deg, transparent, rgba(0, 0, 0, 0.4));
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  margin-bottom: 40px;
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
  }
}

.footer h4 {
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--fg-faint);
  margin-bottom: 14px;
  font-weight: 500;
}

.footer ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer a {
  font-size: 14px;
  color: var(--fg-muted);
  transition: color 160ms ease;
}

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

.footer-bottom {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 13px;
  color: var(--fg-faint);
}

@media (min-width: 768px) {
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.footer-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.footer-tag::before {
  content: '';
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: 0 0 6px var(--accent-cyan);
}

/* Page hero (non-home pages) */
.page-hero {
  padding: 100px 0 60px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.page-hero h1 {
  font-size: clamp(36px, 5vw, 56px);
  margin-bottom: 16px;
}

.page-hero p {
  font-size: 18px;
  max-width: 640px;
  color: var(--fg-muted);
}

/* Utility */
.lead {
  font-size: clamp(17px, 1.6vw, 19px);
  line-height: 1.55;
  color: var(--fg-muted);
}

.muted {
  color: var(--fg-muted);
}

.faint {
  color: var(--fg-faint);
}

.mono {
  font-family: var(--font-mono);
}

/* Selection */
::selection {
  background: rgba(0, 212, 255, 0.3);
  color: #fff;
}

/* Scrollbar (subtle) */
@media (pointer: fine) {
  ::-webkit-scrollbar {
    width: 10px;
    height: 10px;
  }
  ::-webkit-scrollbar-track {
    background: transparent;
  }
  ::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.08);
    border-radius: 999px;
  }
  ::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.16);
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}