/* Frontend Engine — Core Design System */
:root {
  --bg: #0f172a;
  --surface: #111827;
  --surface-2: #0b1220;
  --primary: #7c3aed;
  --secondary: #22d3ee;
  --accent: #f59e0b;
  --text: #e5e7eb;
  --text-muted: #94a3b8;
  --border: #1f2937;
  --success: #22c55e;
  --danger: #ef4444;

  --font-sans: Inter, system-ui, sans-serif;
  --h1: clamp(2.2rem, 4vw, 3rem);
  --h2: clamp(1.8rem, 3vw, 2.25rem);
  --h3: clamp(1.4rem, 2.2vw, 1.75rem);
  --h4: clamp(1.1rem, 1.8vw, 1.375rem);
  --body: 16px;
  --line: 1.6;

  --s-1: 4px;
  --s-2: 8px;
  --s-3: 12px;
  --s-4: 16px;
  --s-5: 24px;
  --s-6: 32px;
  --s-7: 48px;
  --s-8: 64px;
  --s-9: 96px;

  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --shadow-sm: 0 8px 24px rgba(0, 0, 0, .25);
  --shadow-md: 0 12px 30px rgba(2, 6, 23, .35);
  --glass: rgba(17, 24, 39, .58);
  --glass-border: rgba(148, 163, 184, .18);

  --container: 1320px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--body);
  line-height: var(--line);
  background:
    radial-gradient(circle at 15% 8%, rgba(34,211,238,.16) 0, transparent 30%),
    radial-gradient(circle at 82% 12%, rgba(124,58,237,.26) 0, transparent 35%),
    radial-gradient(circle at 50% 100%, rgba(30,41,59,.35) 0, transparent 45%),
    var(--bg);
  color: var(--text);
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.container {
  width: min(var(--container), 92%);
  margin-inline: auto;
}

.section { padding: var(--s-8) 0; }
.section-title { font-size: var(--h2); margin: 0 0 var(--s-4); }
.section-subtitle { color: var(--text-muted); margin: 0 0 var(--s-6); }

.fe-breadcrumb-wrap {
  padding: 14px 0 8px;
}

.fe-breadcrumb {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(17, 24, 39, .62);
  border: 1px solid rgba(148, 163, 184, .2);
  border-radius: 999px;
  padding: 8px 14px;
  color: var(--text-muted);
  font-size: .84rem;
}

.fe-breadcrumb a {
  color: var(--text);
  font-weight: 600;
  transition: color .2s ease;
}

.fe-breadcrumb a:hover {
  color: #c4b5fd;
}

.fe-breadcrumb .is-current {
  color: #cbd5e1;
}

.fe-breadcrumb__icon {
  width: 18px;
  height: 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  color: #a78bfa;
  background: rgba(124, 58, 237, .16);
  border: 1px solid rgba(124, 58, 237, .35);
  font-size: .7rem;
  transition: box-shadow .25s ease, transform .25s ease, background .25s ease;
}

.fe-breadcrumb__divider {
  width: 34px;
  height: 1px;
  display: inline-block;
  background: linear-gradient(90deg, rgba(124, 58, 237, .65), rgba(34, 211, 238, .65));
  opacity: .85;
  transform-origin: left center;
  transition: transform .3s ease, opacity .3s ease;
}

.fe-breadcrumb:hover .fe-breadcrumb__icon {
  transform: translateY(-1px) scale(1.06);
  background: rgba(124, 58, 237, .24);
  box-shadow: 0 0 12px rgba(124, 58, 237, .45), 0 0 18px rgba(34, 211, 238, .25);
}

.fe-breadcrumb:hover .fe-breadcrumb__divider {
  transform: scaleX(1.12);
  opacity: 1;
}

h1 { font-size: var(--h1); line-height: 1.15; margin: 0 0 var(--s-4); }
h2 { font-size: var(--h2); line-height: 1.2; margin: 0 0 var(--s-4); }
h3 { font-size: var(--h3); line-height: 1.25; margin: 0 0 var(--s-3); }
h4 { font-size: var(--h4); line-height: 1.3; margin: 0 0 var(--s-2); }
p { margin: 0 0 var(--s-4); color: var(--text-muted); }

/* Glass + cards */
.glass,
.card {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}
.card { padding: var(--s-5); }

/* Buttons */
.btn {
  border: 1px solid transparent;
  background: transparent;
  color: var(--text);
  padding: 11px 18px;
  border-radius: 999px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  transition: .25s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--primary); box-shadow: 0 0 0 0 rgba(124,58,237,.5); }
.btn-primary:hover { box-shadow: 0 0 24px rgba(124,58,237,.48); }
.btn-secondary { background: var(--secondary); color: #03141a; }
.btn-outline { border-color: var(--border); }
.btn-gradient { background: linear-gradient(135deg, var(--primary), var(--secondary)); }
.btn-ghost { background: rgba(148, 163, 184, .1); border-color: rgba(148, 163, 184, .18); }
.btn-icon { width: 42px; height: 42px; justify-content: center; padding: 0; }
.btn-fab {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 56px;
  height: 56px;
  justify-content: center;
  border-radius: 50%;
  z-index: 80;
}

/* Inputs */
.input,
.select,
.textarea {
  width: 100%;
  border: 1px solid var(--border);
  background: #0b1220;
  color: var(--text);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
}
.input:focus,
.select:focus,
.textarea:focus { outline: 2px solid color-mix(in srgb, var(--primary), #fff 15%); }

.field { display: grid; gap: var(--s-2); }
.label { font-size: .9rem; color: var(--text-muted); }

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 10px;
  font-size: .78rem;
}
.badge-primary { background: rgba(124,58,237,.2); border-color: rgba(124,58,237,.45); }
.tag { background: rgba(34,211,238,.15); border-color: rgba(34,211,238,.45); }

/* Utilities */
.grid { display: grid; gap: var(--s-5); }
.grid-auto { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.center { text-align: center; }
.hidden { display: none !important; }
.sticky { position: sticky; top: 0; z-index: 70; }
.surface { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-md); }

/* Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(148, 163, 184, .15);
  background: rgba(15, 23, 42, .74);
  backdrop-filter: blur(10px);
}

/* WP integration: keep userbar + subbar visible on Frontend Engine route */
.frontend-engine-route .site-header {
  display: none;
}

.frontend-engine-route .userbar,
.frontend-engine-route .subbar {
  position: relative;
  z-index: 120;
}

.frontend-engine-route .fe-index .navbar {
  position: relative;
  top: auto;
}
.navbar-inner {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-4);
}
.brand { font-weight: 800; letter-spacing: .2px; }
.brand span { color: var(--secondary); }
.menu { display: flex; gap: var(--s-4); align-items: center; }
.menu a { color: var(--text-muted); }
.menu a:hover { color: var(--text); }
.menu a.is-active {
  color: var(--text);
  background: rgba(124, 58, 237, .2);
  border: 1px solid rgba(124, 58, 237, .5);
  border-radius: 999px;
  padding: 6px 12px;
}
.mobile-toggle { display: none; }

/* Footer */
.footer {
  border-top: 1px solid var(--border);
  margin-top: var(--s-8);
  padding: var(--s-7) 0;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: var(--s-5); }
.footer a { color: var(--text-muted); }
.footer a:hover { color: var(--text); }

/* Breakpoints */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 820px) {
  .mobile-toggle { display: inline-flex; }
  .menu { display: none; position: absolute; left: 4%; right: 4%; top: 74px; flex-direction: column; padding: var(--s-4); }
  .menu.is-open { display: flex; }
}
@media (max-width: 560px) {
  .footer-grid { grid-template-columns: 1fr; }
}