/* =====================================================================
   AVSAR — Intro Loading Animation
   Add <link rel="stylesheet" href="css/intro.css" /> to index.html
   ===================================================================== */

#intro-overlay {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 1rem;
  text-align: center;
  color: #fff;
  background: radial-gradient(
    circle at 50% 30%,
    #173a25 0%,
    #09180f 55%,
    #040c07 100%
  );
  transition:
    opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.8s cubic-bezier(0.16, 1, 0.3, 1),
    filter 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

#intro-overlay.intro-exit {
  opacity: 0;
  transform: scale(1.05);
  filter: blur(8px);
  pointer-events: none;
}

#intro-overlay.intro-hidden {
  display: none;
}

body.intro-active {
  overflow: hidden;
}

/* Decorative ambient glows */
.intro-glow {
  position: absolute;
  width: 25rem;
  height: 25rem;
  border-radius: 50%;
  filter: blur(6.25rem);
  pointer-events: none;
}

.intro-glow-1 {
  top: -10rem;
  left: -10rem;
  background: rgba(52, 211, 153, 0.1);
}

.intro-glow-2 {
  bottom: -10rem;
  right: -10rem;
  background: rgba(245, 158, 11, 0.1);
}

/* Skip button */
.intro-skip {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  z-index: 10;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 1rem;
  border-radius: 62.4375rem;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.05);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  backdrop-filter: blur(0.5rem);
  opacity: 0;
  animation: intro-fade-in 0.5s ease 0.3s forwards;
  transition:
    opacity 0.2s ease,
    border-color 0.2s ease,
    transform 0.2s ease;
}

.intro-skip:hover,
.intro-skip:focus-visible {
  opacity: 1 !important;
  border-color: rgba(255, 255, 255, 0.4);
  transform: scale(1.05);
}

.intro-skip svg {
  width: 0.75rem;
  height: 0.75rem;
  stroke: currentColor;
  fill: none;
}

/* Center stage */
.intro-stage {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  max-width: 26rem;
}

/* Seed + sprout */
.intro-seed-wrap {
  position: relative;
  height: 7rem;
  width: 7rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.intro-seed {
  position: absolute;
  height: 1.25rem;
  width: 1.25rem;
  border-radius: 50%;
  background: linear-gradient(135deg, #fbbf24, #d97706);
  opacity: 1;
  animation: intro-seed-pulse 1s ease-in-out infinite;
  filter: drop-shadow(0 0 0.75rem rgba(245, 158, 11, 0.6));
  transition:
    opacity 0.3s ease,
    transform 0.3s ease;
}

#intro-overlay.intro-step-1 .intro-seed,
#intro-overlay.intro-step-2 .intro-seed,
#intro-overlay.intro-step-3 .intro-seed {
  opacity: 0;
  transform: scale(0);
}

.intro-sprout {
  position: absolute;
  width: 5rem;
  height: 5rem;
  color: #34d399;
  opacity: 0;
  transform: scale(0.8);
  transition:
    opacity 0.8s ease,
    transform 0.8s ease;
  filter: drop-shadow(0 0 0.9rem rgba(52, 211, 153, 0.4));
}

#intro-overlay.intro-step-1 .intro-sprout,
#intro-overlay.intro-step-2 .intro-sprout {
  opacity: 1;
  transform: scale(1);
}

#intro-overlay.intro-step-3 .intro-sprout {
  opacity: 0;
  transform: scale(0.85);
}

/* Real AVSAR logo, fades in where the sprout was as the final beat */
.intro-logo {
  position: absolute;
  width: 4.25rem;
  height: 4.25rem;
  object-fit: contain;
  opacity: 0;
  transform: scale(0.7);
  filter: drop-shadow(0 0 1rem rgba(52, 211, 153, 0.35));
  transition:
    opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1) 0.15s,
    transform 0.7s cubic-bezier(0.16, 1, 0.3, 1) 0.15s;
}

#intro-overlay.intro-step-3 .intro-logo {
  opacity: 1;
  transform: scale(2.5);
}

.intro-sprout path {
  stroke: currentColor;
  fill: none;
  stroke-linecap: round;
  stroke-dasharray: 120;
  stroke-dashoffset: 120;
  transition: stroke-dashoffset 1s ease-in-out;
}

#intro-overlay.intro-step-1 .intro-stem {
  stroke-dashoffset: 0;
  transition-delay: 0s;
}

#intro-overlay.intro-step-1 .intro-leaf-left {
  stroke-dashoffset: 0;
  transition-delay: 0.4s;
}

#intro-overlay.intro-step-1 .intro-leaf-right {
  stroke-dashoffset: 0;
  transition-delay: 0.8s;
}

.intro-spark {
  opacity: 0;
  transform-origin: 50px 20px;
  transform: scale(0);
  transition:
    opacity 0.4s ease 1.2s,
    transform 0.4s ease 1.2s;
  filter: drop-shadow(0 0 0.5rem #f59e0b);
}

#intro-overlay.intro-step-1 .intro-spark {
  opacity: 1;
  transform: scale(1);
}

/* Value words (Hope / Dignity) */
.intro-values {
  position: relative;
  height: 2.5rem;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.intro-value {
  position: absolute;
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  opacity: 0;
  transform: translateY(25px);
  transition:
    opacity 0.4s ease,
    transform 0.4s ease;
}

.intro-value[data-value="hope"] {
  color: #fbbf24;
  text-shadow: 0 0 0.5rem rgba(245, 158, 11, 0.3);
}

.intro-value[data-value="dignity"] {
  color: #6ee7b7;
  text-shadow: 0 0 0.5rem rgba(110, 231, 183, 0.3);
}

#intro-overlay.intro-step-1 .intro-value[data-value="hope"] {
  opacity: 1;
  transform: translateY(0);
}

#intro-overlay.intro-step-2 .intro-value[data-value="hope"] {
  opacity: 0;
  transform: translateY(-25px);
}

#intro-overlay.intro-step-2 .intro-value[data-value="dignity"] {
  opacity: 1;
  transform: translateY(0);
}

#intro-overlay.intro-step-3 .intro-value {
  opacity: 0;
}

/* Brand reveal */
.intro-brand {
  overflow: hidden;
}

.intro-title,
.intro-subtitle,
.intro-divider,
.intro-tagline {
  opacity: 0;
}

.intro-title {
  margin: 0 0 0.25rem;
  font-family: "Poppins", sans-serif;
  font-size: clamp(2.2rem, 8vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1;
  background: linear-gradient(90deg, #ffffff, #f1f5f9, #a7f3d0);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  transform: translateY(60px);
  transition:
    opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.intro-subtitle {
  margin: 0;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: rgba(167, 243, 208, 0.85);
  transition: opacity 0.8s ease 0.4s;
}

.intro-divider {
  width: 0;
  height: 0.2rem;
  margin: 1rem auto 0;
  border-radius: 62.4375rem;
  background: linear-gradient(90deg, #fbbf24, #34d399);
  transition:
    width 0.8s ease 0.6s,
    opacity 0.2s ease 0.6s;
}

.intro-tagline {
  margin: 0.85rem 0 0;
  font-size: 0.8rem;
  font-style: italic;
  color: rgba(226, 232, 240, 0.75);
  transition:
    opacity 0.6s ease 0.8s,
    transform 0.6s ease 0.8s;
  transform: translateY(10px);
}

#intro-overlay.intro-step-3 .intro-title {
  opacity: 1;
  transform: translateY(0);
}

#intro-overlay.intro-step-3 .intro-subtitle,
#intro-overlay.intro-step-3 .intro-tagline {
  opacity: 1;
  transform: translateY(0);
}

#intro-overlay.intro-step-3 .intro-divider {
  width: 5rem;
}

@keyframes intro-seed-pulse {
  0%,
  100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.25);
  }
}

@keyframes intro-fade-in {
  to {
    opacity: 0.6;
  }
}

@media (prefers-reduced-motion: reduce) {
  #intro-overlay,
  .intro-seed,
  .intro-sprout,
  .intro-sprout path,
  .intro-spark,
  .intro-value,
  .intro-title,
  .intro-subtitle,
  .intro-divider,
  .intro-tagline {
    animation: none !important;
    transition: none !important;
  }
}

@media (max-width: 30rem) {
  .intro-seed-wrap {
    height: 5.5rem;
    width: 5.5rem;
  }

  .intro-sprout {
    width: 4rem;
    height: 4rem;
  }
}