/* ============================================================
   Page Keep-Alive — Shared Styles
   zenteno.xyz/PKA/
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* ─── Design Tokens ─────────────────────────────────────────── */
:root {
  --bg-deep:        #050C1A;
  --bg-surface:     #091525;
  --bg-card:        #0F1E36;
  --bg-card-hover:  #162742;
  --border:         rgba(100, 160, 255, 0.10);
  --border-hover:   rgba(100, 160, 255, 0.25);
  --primary:        #3B82F6;
  --primary-dark:   #2563EB;
  --primary-light:  #60A5FA;
  --primary-glow:   rgba(59, 130, 246, 0.20);
  --green:          #22C55E;
  --green-dark:     #16A34A;
  --green-glow:     rgba(34, 197, 94, 0.15);
  --yellow:         #FBBF24;
  --text:           #E8F2FF;
  --text-muted:     #7B90B0;
  --text-subtle:    #3D5070;
  --radius:         12px;
  --radius-lg:      20px;
  --shadow:         0 4px 24px rgba(0,0,0,0.5);
  --shadow-lg:      0 12px 56px rgba(0,0,0,0.7);
  --transition:     all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --max-w:          1100px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', -apple-system, sans-serif;
  background: var(--bg-deep);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: var(--primary-light); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; display: block; }

.container { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(59,130,246,0.12);
  border: 1px solid rgba(59,130,246,0.28);
  color: var(--primary-light);
  font-size: 11px;
  font-weight: 700;
  padding: 5px 12px;
  border-radius: 999px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.gradient-text {
  background: linear-gradient(135deg, #60A5FA 0%, #A78BFA 50%, #34D399 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-d1 { transition-delay: 0.08s; }
.reveal-d2 { transition-delay: 0.16s; }
.reveal-d3 { transition-delay: 0.24s; }
.reveal-d4 { transition-delay: 0.32s; }
.reveal-d5 { transition-delay: 0.40s; }
.reveal-d6 { transition-delay: 0.48s; }

/* Nav */
.nav {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 100; padding: 18px 0;
  transition: var(--transition);
}
.nav.scrolled {
  background: rgba(5,12,26,0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 12px 0;
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  max-width: var(--max-w); margin: 0 auto; padding: 0 24px;
}
.nav-logo {
  display: flex; align-items: center; gap: 10px;
  font-size: 16px; font-weight: 700; color: var(--text);
}
.nav-logo-icon { font-size: 22px; }
.nav-links { display: flex; gap: 28px; }
.nav-links a { font-size: 14px; font-weight: 500; color: var(--text-muted); transition: color 0.2s; }
.nav-links a:hover { color: var(--text); text-decoration: none; }
.nav-cta { display: flex; gap: 10px; align-items: center; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 22px; border-radius: var(--radius);
  font-size: 15px; font-weight: 600; cursor: pointer;
  border: none; transition: var(--transition); text-decoration: none;
  white-space: nowrap; line-height: 1;
}
.btn:hover { text-decoration: none; }
.btn-primary {
  background: var(--primary); color: #fff;
  box-shadow: 0 4px 20px rgba(59,130,246,0.35);
}
.btn-primary:hover {
  background: var(--primary-dark);
  box-shadow: 0 6px 28px rgba(59,130,246,0.55);
  transform: translateY(-1px); color: #fff;
}
.btn-green {
  background: var(--green); color: #fff;
  box-shadow: 0 4px 20px rgba(34,197,94,0.35);
}
.btn-green:hover {
  background: var(--green-dark);
  box-shadow: 0 6px 28px rgba(34,197,94,0.5);
  transform: translateY(-1px); color: #fff;
}
.btn-ghost {
  background: transparent; color: var(--text-muted);
  border: 1px solid var(--border);
}
.btn-ghost:hover {
  background: var(--bg-card);
  border-color: var(--border-hover); color: var(--text);
}
.btn-lg { padding: 16px 36px; font-size: 17px; border-radius: 16px; }
.btn-sm { padding: 8px 16px; font-size: 13px; }

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: var(--transition);
}
.card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}

/* Section headers */
.section-header { text-align: center; margin-bottom: 56px; }
.section-header .badge { margin-bottom: 16px; }
.section-header h2 {
  font-size: clamp(28px, 5vw, 44px);
  font-weight: 800; margin-bottom: 16px;
  line-height: 1.15; letter-spacing: -0.025em;
}
.section-header p {
  font-size: 18px; color: var(--text-muted);
  max-width: 540px; margin: 0 auto;
}

/* Footer */
footer {
  border-top: 1px solid var(--border);
  padding: 48px 0;
}
.footer-inner {
  display: flex; align-items: flex-start;
  justify-content: space-between; flex-wrap: wrap; gap: 24px;
}
.footer-brand { font-size: 16px; font-weight: 700; color: var(--text-muted); }
.footer-brand small { display: block; font-size: 12px; font-weight: 400; margin-top: 4px; color: var(--text-subtle); }
.footer-links { display: flex; gap: 24px; flex-wrap: wrap; }
.footer-links a { font-size: 14px; color: var(--text-muted); transition: color 0.2s; }
.footer-links a:hover { color: var(--text); text-decoration: none; }
.footer-copy { width: 100%; font-size: 12px; color: var(--text-subtle); margin-top: 24px; border-top: 1px solid var(--border); padding-top: 24px; }

@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .nav-links { display: none; }
  .footer-inner { flex-direction: column; }
}
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  * { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
}