/* ═══════════════════════════════════════════
   UTILITIES.CSS — Keyframe animations, micro-interactions
═══════════════════════════════════════════ */

/* ── Fade In ── */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ── Float Mockup (Hero) ── */
@keyframes float-mockup {
  0%, 100% { transform: translateY(0px); }
  50%       { transform: translateY(-12px); }
}

/* ── Sweepline (GeoICON tactical data sweep) ── */
@keyframes sweepline {
  0%   { top: -2px; opacity: 1; }
  95%  { top: 100%; opacity: 1; }
  100% { top: 100%; opacity: 0; }
}

/* ── Pulse Glow ── */
@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 0 0 rgba(0, 131, 143, 0); }
  50%       { box-shadow: 0 0 0 8px rgba(0, 131, 143, 0.15); }
}

/* ── Section Reveal (Scroll-triggered via JS) ── */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s var(--ease-out),
              transform 0.6s var(--ease-out);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered children */
.reveal-stagger > * {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s var(--ease-out),
              transform 0.5s var(--ease-out);
}

.reveal-stagger.visible > *:nth-child(1) { transition-delay: 0.0s; opacity: 1; transform: none; }
.reveal-stagger.visible > *:nth-child(2) { transition-delay: 0.1s; opacity: 1; transform: none; }
.reveal-stagger.visible > *:nth-child(3) { transition-delay: 0.2s; opacity: 1; transform: none; }
.reveal-stagger.visible > *:nth-child(4) { transition-delay: 0.3s; opacity: 1; transform: none; }

/* ── Market Card Hover Sweepline ── */
.value-card {
  isolation: isolate;
}

.value-card::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-blue), transparent);
  top: -2px;
  opacity: 0;
  z-index: 2;
  box-shadow: var(--glow-blue-sm);
}

.value-card:hover::after {
  opacity: 1;
  animation: sweepline 2.5s linear infinite;
}

/* ── Feature Tab Panel Hover Sweep ── */
.ftab-layout {
  isolation: isolate;
  position: relative;
}
.ftab-layout::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-blue), var(--color-blue-light), transparent);
  opacity: 0;
  transition: opacity var(--duration-base);
  z-index: 2;
}
.ftab-panel.active .ftab-layout::after {
  opacity: 1;
}

/* ── Slider track fill (progressive) ── */
.calc-slider {
  background: linear-gradient(
    to right,
    var(--color-blue) 0%,
    var(--color-blue) var(--pct, 30%),
    var(--color-border) var(--pct, 30%),
    var(--color-border) 100%
  );
}

/* ── Focus ring accessibility ── */
:focus-visible {
  outline: 2px solid var(--color-blue);
  outline-offset: 3px;
}

/* ── Selection ── */
::selection {
  background: rgba(0, 131, 143, 0.3);
  color: var(--color-text-base);
}

/* ── Scrollbar styling ── */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: var(--color-bg-subtle);
}
::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--color-blue);
}

/* ── Loading shimmer ── */
@keyframes shimmer {
  0%   { background-position: -200% center; }
  100% { background-position:  200% center; }
}

.shimmer {
  background: linear-gradient(
    90deg,
    var(--color-bg-raised) 0%,
    rgba(0,131,143,0.08) 50%,
    var(--color-bg-raised) 100%
  );
  background-size: 200% 100%;
  animation: shimmer 1.8s ease-in-out infinite;
}