/* ============================================================
   QUANTEX — Animations & Transitions
   ============================================================ */

/* ── Keyframes ────────────────────────────────────────────── */
@keyframes glow-pulse {
  0%, 100% {
    opacity: 0.6;
    transform: translateX(-50%) scale(1);
  }
  50% {
    opacity: 1;
    transform: translateX(-50%) scale(1.05);
  }
}

@keyframes dot-pulse {
  0%, 100% {
    opacity: 1;
    box-shadow: 0 0 0 0 rgba(16,185,129,0.5);
  }
  50% {
    opacity: 0.8;
    box-shadow: 0 0 0 4px rgba(16,185,129,0);
  }
}

@keyframes scroll-line {
  0% {
    transform: scaleY(0);
    transform-origin: top;
    opacity: 1;
  }
  50% {
    transform: scaleY(1);
    transform-origin: top;
    opacity: 1;
  }
  51% {
    transform: scaleY(1);
    transform-origin: bottom;
    opacity: 1;
  }
  100% {
    transform: scaleY(0);
    transform-origin: bottom;
    opacity: 0;
  }
}

@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(28px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fade-in {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes scale-in {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes slide-in-right {
  from {
    opacity: 0;
    transform: translateX(24px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slide-in-left {
  from {
    opacity: 0;
    transform: translateX(-24px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes count-up {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes shimmer {
  0%   { background-position: -200% center; }
  100% { background-position: 200% center; }
}

@keyframes border-glow {
  0%, 100% { border-color: rgba(59,130,246,0.2); }
  50%       { border-color: rgba(59,130,246,0.5); }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-8px); }
}

@keyframes progress-fill {
  from { width: 0%; }
  to   { width: var(--target-width, 100%); }
}

@keyframes faq-open {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes result-appear {
  from {
    opacity: 0;
    transform: scale(0.97) translateY(8px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

/* ── Hero Entrance Animations ─────────────────────────────── */
.animate-fade-up {
  animation: fade-up 0.7s cubic-bezier(0.22, 1, 0.36, 1) both;
}

/* ── Scroll-triggered Animations ─────────────────────────── */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(32px);
  transition:
    opacity 0.65s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.65s cubic-bezier(0.22, 1, 0.36, 1);
}

.animate-on-scroll.in-view {
  opacity: 1;
  transform: translateY(0);
}

.animate-on-scroll.slide-left {
  transform: translateX(-32px);
}

.animate-on-scroll.slide-left.in-view {
  transform: translateX(0);
}

.animate-on-scroll.slide-right {
  transform: translateX(32px);
}

.animate-on-scroll.slide-right.in-view {
  transform: translateX(0);
}

/* ── Calculator Results Animation ────────────────────────── */
.results-content.entering {
  animation: result-appear 0.5s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.result-card {
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1),
              box-shadow 0.3s ease;
}

.result-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.3);
}

/* ── FAQ Accordion Animation ──────────────────────────────── */
.faq-answer {
  animation: none;
  transition: none;
}

.faq-answer.opening {
  animation: faq-open 0.3s cubic-bezier(0.22, 1, 0.36, 1) both;
}

/* ── Number Counter ───────────────────────────────────────── */
.stat-number.counting {
  animation: count-up 0.1s ease both;
}

/* ── Loading Shimmer for Results ──────────────────────────── */
.result-number.loading {
  background: linear-gradient(
    90deg,
    var(--text-muted) 0%,
    rgba(255,255,255,0.15) 50%,
    var(--text-muted) 100%
  );
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: shimmer 1.2s linear infinite;
}

/* ── Nav Active State ─────────────────────────────────────── */
.nav-link.active {
  color: var(--text-primary);
  background: rgba(59,130,246,0.08);
}

/* ── Service Card Hover Glow ──────────────────────────────── */
.service-card::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  transform: translateX(-50%);
  width: 60%;
  height: 1px;
  background: var(--gradient);
  opacity: 0;
  transition: opacity var(--transition-slow), width var(--transition-slow);
  border-radius: 1px;
}

.service-card:hover::after {
  opacity: 0.6;
  width: 80%;
}

/* ── Process Step Reveal ──────────────────────────────────── */
.process-step .step-number {
  transition: background var(--transition-slow),
              border-color var(--transition-slow),
              box-shadow var(--transition-slow);
}

.process-step.in-view .step-number {
  background: rgba(59,130,246,0.15);
  border-color: rgba(59,130,246,0.4);
  box-shadow: 0 0 20px rgba(59,130,246,0.2);
}

/* ── Page Load Progress ───────────────────────────────────── */
.page-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  background: var(--gradient);
  z-index: 9999;
  transition: width 0.1s linear;
  box-shadow: 0 0 8px rgba(59,130,246,0.6);
}

/* ── Mobile Nav Transition ────────────────────────────────── */
@media (max-width: 768px) {
  .nav-links {
    transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1),
                opacity 0.35s ease;
  }

  .nav-links.nav-open {
    animation: fade-up 0.35s cubic-bezier(0.22, 1, 0.36, 1) both;
  }
}

/* ── Back to Top Visibility ───────────────────────────────── */
.back-to-top {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity var(--transition), transform var(--transition),
              background var(--transition), color var(--transition),
              box-shadow var(--transition);
}

.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── Reduce Motion ────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .animate-on-scroll {
    opacity: 1;
    transform: none;
  }

  .hero-bg-glow {
    animation: none;
  }

  .badge-dot {
    animation: none;
  }

  .hero-scroll-indicator span {
    animation: none;
  }
}

/* ── Focus Styles ─────────────────────────────────────────── */
.btn:focus-visible {
  outline: 2px solid var(--accent-light);
  outline-offset: 3px;
  box-shadow: 0 0 0 4px rgba(59,130,246,0.2);
}

.faq-question:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
  border-radius: var(--radius-lg);
}

.calc-input:focus-visible,
.form-input:focus-visible {
  outline: none;
}

/* ── Trust Tags Scroll Animation ──────────────────────────── */
.trust-bar-inner {
  animation: none;
}

/* ── Stagger Delays for Service Cards ─────────────────────── */
.services-grid .service-card:nth-child(1) { transition-delay: 0s; }
.services-grid .service-card:nth-child(2) { transition-delay: 0.08s; }
.services-grid .service-card:nth-child(3) { transition-delay: 0.16s; }
.services-grid .service-card:nth-child(4) { transition-delay: 0.24s; }