/* =====================================================================
   Milestone Overlay
   Full-screen overlay for streak milestone celebrations
   ===================================================================== */

:root {
  --dark-overlay: rgba(0, 0, 0, 0.85);
}

.milestone-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: var(--dark-overlay);
  display: grid;
  place-items: center;
  transition: opacity var(--time-200);
}

/* Confetti layer */

.milestone__confetti {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.milestone__confetti-particle {
  position: absolute;
  top: -10px;
  border-radius: 2px;
  animation: confetti-fall 3s ease-in forwards;
}

@keyframes confetti-fall {
  0%   { transform: translateY(0) rotate(0deg);    opacity: 1; }
  100% { transform: translateY(110vh) rotate(720deg); opacity: 0; }
}

/* Card */

.milestone__card {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-6);
  width: min(90vw, 400px);
  text-align: center;
}

/* Days hero */

.milestone__days {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
}

.milestone__days-number {
  font-family: var(--font-mono);
  font-size: var(--text-display);
  font-weight: 800;
  color: var(--rank-gold);
  line-height: var(--leading-none);
}

.milestone__days-label {
  font-family: var(--font-mono);
  font-size: var(--text-label);
  font-weight: 700;
  color: var(--rank-gold);
  letter-spacing: 0.1em;
}

/* Cat animation */

.milestone__cat-animation {
  width: 160px;
  height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 5rem;
  animation: cat-excited 0.6s steps(1) infinite;
}

@keyframes cat-excited {
  0%,  33% { transform: scale(1)    rotate(0deg);  }
  34%, 66% { transform: scale(1.1)  rotate(-5deg); }
  67%, 99% { transform: scale(1.05) rotate(5deg);  }
}

/* Labels */

.milestone__unlock-label {
  color: #ffffff;
  font-size: var(--text-subheading);
  font-weight: var(--font-semibold);
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}

.milestone__status-label {
  color: var(--neutral-accent);
  font-size: var(--text-body);
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}

/* Buttons */

.btn--gold {
  --btn-background: var(--rank-gold);
  --btn-border-color: transparent;
  --btn-color: #3D2800;
  --btn-hover-color: #c49b25;
  --btn-radius: var(--radius-full);
  width: 100%;
}

.milestone__share--copied {
  --btn-background: var(--success);
  --btn-color: #ffffff;
  --btn-hover-color: rgb(from var(--success) r g b / .9);
}

.milestone__done {
  width: 100%;
  --btn-radius: var(--radius-full);
}

/* Countdown bar */

.milestone__countdown-bar {
  width: 100%;
  height: 3px;
  background: var(--happy-primary);
  border-radius: var(--radius-full);
  transform-origin: left center;
}

.milestone__countdown-bar--active {
  animation: countdown-shrink 5s linear forwards;
}

@keyframes countdown-shrink {
  from { width: 100%; }
  to   { width: 0%; }
}

/* Clipboard fallback textarea */

.milestone__clipboard-fallback {
  width: 100%;
  padding: var(--space-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  resize: none;
  background: rgba(255, 255, 255, 0.1);
  color: #ffffff;
}

/* Reduced-motion preferences */

@media (prefers-reduced-motion: reduce) {
  .milestone__cat-animation {
    animation: none;
  }
}