/* ============================================================
   SCHOOL ERP — ANIMATIONS
   IntersectionObserver triggers + CSS keyframes
   ============================================================ */

/* ── Base State (before animation) ─────────────────────────── */
[data-animate] {
  opacity: 0;
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

[data-animate].animate-in {
  opacity: 1;
  transform: none !important;
}

/* Direction variants */
[data-animate="fade-up"] {
  transform: translateY(40px);
}

[data-animate="fade-down"] {
  transform: translateY(-40px);
}

[data-animate="fade-left"] {
  transform: translateX(40px);
}

[data-animate="fade-right"] {
  transform: translateX(-40px);
}

[data-animate="scale-in"] {
  transform: scale(0.92);
}

[data-animate="fade-in"] {
  transform: none;
}

/* ── Stagger Delays ────────────────────────────────────────── */
.stagger-grid [data-animate]:nth-child(1)  { transition-delay: 0ms; }
.stagger-grid [data-animate]:nth-child(2)  { transition-delay: 80ms; }
.stagger-grid [data-animate]:nth-child(3)  { transition-delay: 160ms; }
.stagger-grid [data-animate]:nth-child(4)  { transition-delay: 240ms; }
.stagger-grid [data-animate]:nth-child(5)  { transition-delay: 320ms; }
.stagger-grid [data-animate]:nth-child(6)  { transition-delay: 400ms; }
.stagger-grid [data-animate]:nth-child(7)  { transition-delay: 480ms; }
.stagger-grid [data-animate]:nth-child(8)  { transition-delay: 560ms; }
.stagger-grid [data-animate]:nth-child(9)  { transition-delay: 640ms; }
.stagger-grid [data-animate]:nth-child(10) { transition-delay: 720ms; }
.stagger-grid [data-animate]:nth-child(11) { transition-delay: 800ms; }
.stagger-grid [data-animate]:nth-child(12) { transition-delay: 880ms; }

/* Longer delay variant */
[data-delay="100"] { transition-delay: 100ms !important; }
[data-delay="200"] { transition-delay: 200ms !important; }
[data-delay="300"] { transition-delay: 300ms !important; }
[data-delay="400"] { transition-delay: 400ms !important; }
[data-delay="500"] { transition-delay: 500ms !important; }
[data-delay="600"] { transition-delay: 600ms !important; }

/* ── Keyframe Animations ───────────────────────────────────── */
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-12px); }
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 20px rgba(79,70,229,0.15); }
  50%      { box-shadow: 0 0 40px rgba(79,70,229,0.3); }
}

@keyframes slide-in-right {
  from { transform: translateX(100%); opacity: 0; }
  to   { transform: translateX(0); opacity: 1; }
}

@keyframes slide-in-left {
  from { transform: translateX(-100%); opacity: 0; }
  to   { transform: translateX(0); opacity: 1; }
}

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

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

@keyframes bounce-in {
  0%   { transform: scale(0); opacity: 0; }
  50%  { transform: scale(1.15); }
  70%  { transform: scale(0.95); }
  100% { transform: scale(1); opacity: 1; }
}

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

/* ── Utility Animation Classes ─────────────────────────────── */
.animate-float {
  animation: float 4s ease-in-out infinite;
}

.animate-pulse-glow {
  animation: pulse-glow 3s ease-in-out infinite;
}

.animate-spin {
  animation: spin 1s linear infinite;
}

.animate-bounce-in {
  animation: bounce-in 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* ── Hero Specific Animations ──────────────────────────────── */
.hero-content {
  animation: slide-in-left 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.2s both;
}

.hero-image {
  animation: slide-in-right 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.4s both;
}

/* ── Counter Animation ─────────────────────────────────────── */
.stat-number[data-count] {
  /* JS animates the text content; this ensures smooth visual */
  font-variant-numeric: tabular-nums;
}

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

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

.hover-scale {
  transition: transform var(--duration) var(--ease-out);
}

.hover-scale:hover {
  transform: scale(1.03);
}

.hover-glow {
  transition: box-shadow var(--duration) var(--ease-out);
}

.hover-glow:hover {
  box-shadow: var(--shadow-glow);
}

/* ── Image / Visual Hover ──────────────────────────────────── */
.img-hover-zoom {
  overflow: hidden;
}

.img-hover-zoom img {
  transition: transform 0.5s var(--ease-out);
}

.img-hover-zoom:hover img {
  transform: scale(1.06);
}

/* ── Link Underline Animation ──────────────────────────────── */
.link-underline {
  position: relative;
  display: inline;
}

.link-underline::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width var(--duration) var(--ease-out);
}

.link-underline:hover::after {
  width: 100%;
}

/* ── Loading Skeleton ──────────────────────────────────────── */
.skeleton {
  background: linear-gradient(90deg, var(--border) 0%, var(--surface-hover) 50%, var(--border) 100%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}

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

  [data-animate] {
    opacity: 1;
    transform: none;
  }

  .hero-content,
  .hero-image {
    animation: none;
    opacity: 1;
    transform: none;
  }

  html {
    scroll-behavior: auto;
  }
}