/**
 * Scroll to Top Button Styles
 * Version: 3.3.0
 * Professional floating action button
 */

/* ========================================
   SCROLL TO TOP BUTTON
   ======================================== */

.tez-scroll-top {
  position: fixed;
  bottom: calc(20px + var(--tez-safe-bottom, 0px));
  left: calc(20px + var(--tez-safe-left, 0px));
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: linear-gradient(135deg, #333333 0%, #1a1a1a 100%);
  border: none;
  box-shadow: 
    0 4px 12px rgba(0, 0, 0, 0.2),
    0 2px 4px rgba(0, 0, 0, 0.1);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  z-index: var(--tez-z-fab, 900);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px) scale(0.8);
  pointer-events: none;
}

/* Visible state */
.tez-scroll-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
  pointer-events: all;
}

/* Hover state */
.tez-scroll-top:hover {
  background: linear-gradient(135deg, #22BE49 0%, #1a9639 100%);
  transform: translateY(-4px) scale(1.1);
  box-shadow: 
    0 6px 16px rgba(34, 190, 73, 0.3),
    0 4px 8px rgba(0, 0, 0, 0.15);
}

/* Active state */
.tez-scroll-top:active {
  transform: translateY(-2px) scale(1.05);
}

/* Focus state */
.tez-scroll-top:focus-visible {
  outline: 3px solid rgba(34, 190, 73, 0.5);
  outline-offset: 4px;
  background: linear-gradient(135deg, #22BE49 0%, #1a9639 100%);
}

/* Icon */
.tez-scroll-top i {
  color: #ffffff;
  font-size: 18px;
  transition: transform 0.3s ease;
}

.tez-scroll-top:hover i {
  transform: translateY(-2px);
}

/* ========================================
   DARK MODE
   ======================================== */

@media (prefers-color-scheme: dark) {
  .tez-scroll-top {
    background: linear-gradient(135deg, #444444 0%, #2a2a2a 100%);
  }
  
  .tez-scroll-top:hover,
  .tez-scroll-top:focus-visible {
    background: linear-gradient(135deg, #22BE49 0%, #1a9639 100%);
  }
}

/* ========================================
   RESPONSIVE ADJUSTMENTS
   ======================================== */

@media (max-width: 480px) {
  .tez-scroll-top {
    bottom: calc(15px + var(--tez-safe-bottom, 0px));
    left: calc(15px + var(--tez-safe-left, 0px));
    width: 46px;
    height: 46px;
  }
  
  .tez-scroll-top i {
    font-size: 16px;
  }
}

@media (max-width: 360px) {
  .tez-scroll-top {
    width: 42px;
    height: 42px;
  }
  
  .tez-scroll-top i {
    font-size: 14px;
  }
}

/* ========================================
   REDUCED MOTION
   ======================================== */

@media (prefers-reduced-motion: reduce) {
  .tez-scroll-top,
  .tez-scroll-top i {
    transition: opacity 0.1s ease, visibility 0.1s ease;
  }
  
  .tez-scroll-top:hover {
    transform: none;
  }
}

/* ========================================
   HIGH CONTRAST MODE
   ======================================== */

@media (prefers-contrast: high) {
  .tez-scroll-top {
    border: 3px solid currentColor;
  }
}

/* ========================================
   PRINT STYLES
   ======================================== */

@media print {
  .tez-scroll-top {
    display: none !important;
  }
}