/* ============================================================
   Adopnex — shared design system
   Used by main site and articles
============================================================ */

:root,
:root[data-theme="dark"] {
  --bg: #0a0a0c;
  --bg-elev: #111114;
  --bg-elev-2: #16161b;
  --text: #f5f5f7;
  --text-soft: #d4d4dc;
  --muted: #8a8a93;
  --muted-2: #5a5a63;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);
  --accent: #7c9cff;
  --accent-2: #a78bfa;
  --accent-3: #4dd0e1;
  --pill-bg: rgba(20, 20, 24, 0.82);
  --card-bg: rgba(20, 20, 24, 0.6);
  --shadow-lg: 0 30px 80px -20px rgba(0, 0, 0, 0.6),
               0 0 0 1px rgba(255, 255, 255, 0.04) inset;
  --ambient-1: #4a5cff;
  --ambient-2: #a855f7;
  --ambient-3: #06b6d4;
  --ambient-opacity-1: 0.30;
  --ambient-opacity-2: 0.20;
  --ambient-opacity-3: 0.14;
  --grid-dot: rgba(255, 255, 255, 0.04);
  --heading-gradient: linear-gradient(180deg, #ffffff 0%, #b4b4bd 100%);
  color-scheme: dark;
}

:root[data-theme="light"] {
  --bg: #f7f7f9;
  --bg-elev: #ffffff;
  --bg-elev-2: #f0f0f4;
  --text: #0e0e12;
  --text-soft: #2a2a32;
  --muted: #5a5a66;
  --muted-2: #9a9aa4;
  --border: rgba(10, 10, 18, 0.08);
  --border-strong: rgba(10, 10, 18, 0.14);
  --accent: #4a6cff;
  --accent-2: #7e57f5;
  --accent-3: #0aa9bd;
  --pill-bg: rgba(255, 255, 255, 0.82);
  --card-bg: rgba(255, 255, 255, 0.7);
  --shadow-lg: 0 30px 80px -20px rgba(20, 20, 40, 0.18),
               0 0 0 1px rgba(10, 10, 18, 0.04) inset;
  --ambient-1: #b6c2ff;
  --ambient-2: #e0c8ff;
  --ambient-3: #b8eaf0;
  --ambient-opacity-1: 0.55;
  --ambient-opacity-2: 0.45;
  --ambient-opacity-3: 0.40;
  --grid-dot: rgba(10, 10, 30, 0.06);
  --heading-gradient: linear-gradient(180deg, #1a1a22 0%, #3a3a48 100%);
  color-scheme: light;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  transition: background-color 0.25s ease, color 0.25s ease;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }

/* ============================================================
   Ambient background
   NOTE: blur radii intentionally moderate. Very large blur values
   (>= 100px) on multiple stacked elements crash mobile Safari on
   iPhone 13 mini during scroll. Keep blur conservative.
============================================================ */
.ambient {
  position: fixed; inset: 0; z-index: -1;
  pointer-events: none; overflow: hidden;
}
.ambient::before, .ambient::after {
  content: ''; position: absolute;
  border-radius: 50%; filter: blur(80px);
}
.ambient::before {
  width: 520px; height: 520px;
  background: radial-gradient(circle, var(--ambient-1) 0%, transparent 70%);
  top: -160px; left: -120px; opacity: var(--ambient-opacity-1);
}
.ambient::after {
  width: 460px; height: 460px;
  background: radial-gradient(circle, var(--ambient-2) 0%, transparent 70%);
  top: 30%; right: -160px; opacity: var(--ambient-opacity-2);
}
.ambient .blob-3 {
  position: absolute; width: 380px; height: 380px;
  background: radial-gradient(circle, var(--ambient-3) 0%, transparent 70%);
  filter: blur(80px); opacity: var(--ambient-opacity-3);
  top: 70%; left: 30%; border-radius: 50%;
}
/* On small screens / iOS, drop blur entirely (cheaper, no crash) */
@media (max-width: 700px) {
  .ambient::before, .ambient::after, .ambient .blob-3 {
    filter: blur(40px);
  }
  .ambient .blob-3 { display: none; }
}
/* Softer ambient variant for article pages */
.ambient.subtle::before { opacity: calc(var(--ambient-opacity-1) * 0.5); }
.ambient.subtle::after { opacity: calc(var(--ambient-opacity-2) * 0.5); }
.ambient.subtle .blob-3 { opacity: calc(var(--ambient-opacity-3) * 0.5); }

.grid-overlay {
  position: fixed; inset: 0; z-index: -1;
  background-image: radial-gradient(circle, var(--grid-dot) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, black 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, black 30%, transparent 80%);
  pointer-events: none;
}

/* ============================================================
   Pill navbar
============================================================ */
.navbar {
  position: fixed; top: 16px; left: 50%;
  transform: translateX(-50%); z-index: 100;
  display: flex; align-items: center; gap: 4px;
  padding: 8px 8px 8px 20px;
  background: var(--pill-bg);
  backdrop-filter: blur(12px) saturate(160%);
  -webkit-backdrop-filter: blur(12px) saturate(160%);
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  box-shadow: 0 10px 40px -10px rgba(0,0,0,0.35);
  transition: top 0.3s ease, background 0.25s ease;
  max-width: calc(100vw - 32px);
}
.navbar .logo {
  font-size: 1.05rem; font-weight: 700;
  letter-spacing: -0.02em; margin-right: 14px;
  display: flex; align-items: center; gap: 2px;
  color: var(--text);
}
.navbar .logo-dot { color: var(--accent); font-size: 1.4rem; line-height: 1; }
.nav-links { display: flex; align-items: center; gap: 2px; }
.nav-links a {
  padding: 8px 14px; font-size: 0.88rem; font-weight: 500;
  color: var(--muted); border-radius: 999px;
  transition: color 0.15s, background 0.15s;
  white-space: nowrap;
}
.nav-links a:hover,
.nav-links a.active { color: var(--text); background: var(--border); }
.nav-cta {
  margin-left: 8px; padding: 9px 18px;
  background: var(--text); color: var(--bg);
  font-size: 0.85rem; font-weight: 600;
  border-radius: 999px;
  white-space: nowrap;
  transition: opacity 0.15s, transform 0.15s;
}
.nav-cta:hover { opacity: 0.9; transform: scale(1.02); }
.nav-cta .nav-cta-short { display: none; }

@media (max-width: 700px) {
  .navbar { padding: 6px 6px 6px 14px; gap: 2px; }
  .navbar .logo { font-size: 0.95rem; margin-right: 6px; }
  .nav-links a { padding: 7px 10px; font-size: 0.8rem; }
  .nav-cta { padding: 8px 14px; font-size: 0.8rem; margin-left: 4px; }
  .nav-hide-sm { display: none; }
}
@media (max-width: 430px) {
  .navbar { padding: 5px 5px 5px 12px; }
  .navbar .logo { font-size: 0.9rem; margin-right: 4px; }
  .nav-links a { padding: 7px 8px; font-size: 0.78rem; }
  .nav-cta { padding: 8px 12px; font-size: 0.78rem; }
  .nav-cta .nav-cta-full { display: none; }
  .nav-cta .nav-cta-short { display: inline; }
}

/* ============================================================
   Eyebrow / buttons (shared)
============================================================ */
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.78rem; font-weight: 500;
  color: var(--muted);
}
.eyebrow .dot {
  width: 6px; height: 6px;
  background: #34d399; border-radius: 50%;
  box-shadow: 0 0 8px #34d399;
}

.btn {
  padding: 14px 26px; font-size: 0.95rem; font-weight: 600;
  border-radius: 999px; transition: all 0.2s;
  display: inline-flex; align-items: center; gap: 8px;
}
.btn-primary { background: var(--text); color: var(--bg); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 30px rgba(255,255,255,0.15); }
.btn-secondary {
  background: var(--border);
  color: var(--text);
  border: 1px solid var(--border-strong);
}
.btn-secondary:hover { background: var(--border-strong); }

/* ============================================================
   Footer
============================================================ */
.site-footer {
  padding: 40px 24px;
  border-top: 1px solid var(--border);
  display: flex; flex-wrap: wrap;
  justify-content: space-between; align-items: center;
  gap: 16px; max-width: 1200px; margin: 80px auto 0;
  font-size: 0.85rem; color: var(--muted);
}
.site-footer .footer-links { display: flex; gap: 20px; }
.site-footer .footer-links a:hover { color: var(--text); }

/* ============================================================
   Reveal-on-scroll
============================================================ */
.reveal {
  opacity: 0; transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}
.reveal.in { opacity: 1; transform: translateY(0); }
.reveal[data-delay="1"] { transition-delay: 0.1s; }
.reveal[data-delay="2"] { transition-delay: 0.2s; }
.reveal[data-delay="3"] { transition-delay: 0.3s; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}

/* ============================================================
   Selection
============================================================ */
::selection { background: rgba(124, 156, 255, 0.35); color: var(--text); }

/* ============================================================
   Theme switcher (floating, bottom-right)
============================================================ */
.theme-switch {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 200;
  display: inline-flex;
  align-items: center;
  gap: 0;
  padding: 4px;
  background: var(--pill-bg);
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  box-shadow: 0 8px 24px -8px rgba(0, 0, 0, 0.35);
  backdrop-filter: blur(10px) saturate(160%);
  -webkit-backdrop-filter: blur(10px) saturate(160%);
}
.theme-switch button {
  width: 32px; height: 32px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 999px;
  color: var(--muted);
  transition: color 0.18s, background 0.18s;
}
.theme-switch button:hover { color: var(--text); }
.theme-switch button[aria-pressed="true"] {
  background: var(--text);
  color: var(--bg);
}
.theme-switch button svg {
  width: 16px; height: 16px;
  display: block;
}
@media (max-width: 480px) {
  .theme-switch { right: 12px; bottom: 12px; padding: 3px; }
  .theme-switch button { width: 30px; height: 30px; }
}