/* ==========================================================================
   Animations — Keyframes & Scroll-driven Classes
   ========================================================================== */

/* ── Loading Screen ── */
#loading-screen {
  position: fixed;
  inset: 0;
  background: var(--color-bg-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity 0.6s var(--ease-in-out), visibility 0.6s;
}

#loading-screen.is-hidden {
  opacity: 0;
  visibility: hidden;
}

.loading-inner {
  text-align: center;
}

.loading-logo {
  font-family: var(--font-accent);
  font-size: var(--text-2xl);
  font-weight: var(--font-extrabold);
  color: #ffffff;
  letter-spacing: 0.05em;
  opacity: 0;
  animation: fadeIn 0.6s var(--ease-out-expo) 0.2s forwards;
}

.loading-bar {
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-secondary), var(--color-accent));
  border-radius: var(--radius-full);
  margin-top: var(--space-4);
  animation: loadingBar 1.2s var(--ease-out-expo) 0.4s forwards;
}

@keyframes loadingBar {
  to { width: 200px; }
}

/* ── Keyframes ── */
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeDown {
  from { opacity: 0; transform: translateY(-20px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeLeft {
  from { opacity: 0; transform: translateX(30px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes fadeRight {
  from { opacity: 0; transform: translateX(-30px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.85); }
  to   { opacity: 1; transform: scale(1); }
}

@keyframes slideUp {
  from { transform: translateY(100%); opacity: 0; }
  to   { transform: translateY(0);    opacity: 1; }
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50%       { transform: scale(1.05); }
}

@keyframes shimmer {
  from { background-position: -200% center; }
  to   { background-position:  200% center; }
}

@keyframes countUp {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-6px); }
}

@keyframes rotateSlow {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

@keyframes progressFill {
  from { width: 0; }
}

/* ── Scroll Reveal Base ── */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--duration-slow) var(--ease-out-expo),
              transform var(--duration-slow) var(--ease-out-expo);
}

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

.reveal--left {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity var(--duration-slow) var(--ease-out-expo),
              transform var(--duration-slow) var(--ease-out-expo);
}

.reveal--left.is-visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal--right {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity var(--duration-slow) var(--ease-out-expo),
              transform var(--duration-slow) var(--ease-out-expo);
}

.reveal--right.is-visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal--scale {
  opacity: 0;
  transform: scale(0.9);
  transition: opacity var(--duration-slow) var(--ease-out-expo),
              transform var(--duration-slow) var(--ease-out-expo);
}

.reveal--scale.is-visible {
  opacity: 1;
  transform: scale(1);
}

/* Stagger delays for grid children */
.stagger-children > *:nth-child(1) { transition-delay: 0ms; }
.stagger-children > *:nth-child(2) { transition-delay: 80ms; }
.stagger-children > *:nth-child(3) { transition-delay: 160ms; }
.stagger-children > *:nth-child(4) { transition-delay: 240ms; }
.stagger-children > *:nth-child(5) { transition-delay: 320ms; }
.stagger-children > *:nth-child(6) { transition-delay: 400ms; }

/* ── Hero Text Animation ── */
.hero-title .word {
  display: inline-block;
  opacity: 0;
  transform: translateY(40px);
  animation: fadeUp 0.8s var(--ease-out-expo) forwards;
}

.hero-title .word:nth-child(1) { animation-delay: 0.6s; }
.hero-title .word:nth-child(2) { animation-delay: 0.75s; }
.hero-title .word:nth-child(3) { animation-delay: 0.9s; }
.hero-title .word:nth-child(4) { animation-delay: 1.05s; }

.hero-sub {
  opacity: 0;
  animation: fadeUp 0.8s var(--ease-out-expo) 1.1s forwards;
}

.hero-cta-group {
  opacity: 0;
  animation: fadeUp 0.8s var(--ease-out-expo) 1.3s forwards;
}

.hero-stats {
  opacity: 0;
  animation: fadeUp 0.8s var(--ease-out-expo) 1.5s forwards;
}

/* ── Gradient Text ── */
.gradient-text {
  background: linear-gradient(135deg, var(--color-secondary), var(--color-primary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── Shimmer Button Effect ── */
.btn--shimmer {
  position: relative;
  overflow: hidden;
}

.btn--shimmer::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    105deg,
    transparent 40%,
    rgba(255,255,255,.3) 50%,
    transparent 60%
  );
  background-size: 200% auto;
  animation: shimmer 2.5s linear infinite;
}

/* ── Progress Bar ── */
.progress-bar {
  height: 6px;
  background: var(--color-border);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar__fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  border-radius: var(--radius-full);
  width: 0;
  transition: width 1.2s var(--ease-out-expo);
}

.progress-bar__fill.is-animated {
  animation: progressFill 1.2s var(--ease-out-expo) forwards;
}

/* ── Parallax ── */
.parallax {
  will-change: transform;
}

/* ── Hover Lift ── */
.hover-lift {
  transition: transform var(--duration-base) var(--ease-out-expo),
              box-shadow var(--duration-base);
}

.hover-lift:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

/* ── Pulse animation for CTA ── */
.pulse-ring {
  animation: pulse 2s ease-in-out infinite;
}

/* ── Scroll Indicator ── */
.scroll-indicator {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  opacity: 0;
  animation: fadeIn 1s var(--ease-out-expo) 2s forwards;
}

.scroll-indicator__mouse {
  width: 24px;
  height: 38px;
  border: 2px solid rgba(255,255,255,.5);
  border-radius: 12px;
  position: relative;
}

.scroll-indicator__wheel {
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 8px;
  background: rgba(255,255,255,.8);
  border-radius: var(--radius-full);
  animation: bounce 1.5s ease-in-out infinite;
}

.scroll-indicator__text {
  font-size: var(--text-xs);
  color: rgba(255,255,255,.5);
  letter-spacing: 0.1em;
  font-family: var(--font-accent);
}