/* =====================================================
   SCROLL-TO-TOP FEATURE - PORTFOLIO STYLES (FIXED)
===================================================== */

.scroll-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  cursor: pointer;
  z-index: 9999;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all 0.3s ease;
}

.scroll-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* Progress Circle */
.progress-circle {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.progress-circle-bg,
.progress-circle-fill {
  fill: none;
  stroke-width: 4;
  cx: 50%;
  cy: 50%;
  r: 20; /* default radius */
}

.progress-circle-bg {
  stroke: rgba(255, 255, 255, 0.2);
}

.progress-circle-fill {
  stroke: #6e45e2;
  stroke-linecap: round;
  stroke-dasharray: 125.66;  /* 2πr (r=20) */
  stroke-dashoffset: 125.66;
  transition: stroke-dashoffset 0.15s ease;
}

/* Inner Button */
.scroll-icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 38px;
  height: 38px;
  background: #6e45e2;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
}

.scroll-icon svg {
  stroke: white;
  width: 30px;   /* bigger arrow */
  height: 30px;  /* bigger arrow */
  transition: transform 0.3s ease;
}

/* Hover */
.scroll-to-top:hover .progress-circle-fill {
  stroke: #8b5cf6;
}

.scroll-to-top:hover .scroll-icon {
  background: #8b5cf6;
  transform: translate(-50%, -50%) scale(1.08);
}

/* Pulse when near bottom */
.scroll-to-top.near-bottom .scroll-icon {
  animation: pulse 2s infinite;
  border-radius: 50%; /* ensures circular glow */
}

@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 rgba(110, 69, 226, 0.8); }
  70%  { box-shadow: 0 0 0 30px rgba(110, 69, 226, 0); }
  100% { box-shadow: 0 0 0 0 rgba(110, 69, 226, 0); }
}

/* Responsive */
@media (max-width: 768px) {
  .scroll-to-top {
    bottom: 20px;
    right: 20px;
    width: 45px;
    height: 45px;
  }
  .progress-circle-bg,
  .progress-circle-fill {
    r: 18;
    stroke-dasharray: 113.1; /* 2πr */
    stroke-dashoffset: 113.1;
  }
  .scroll-icon {
    width: 34px;
    height: 34px;
  }
  .scroll-icon svg {
    width: 22px;
    height: 22px;
  }
}

@media (max-width: 480px) {
  .scroll-to-top {
    bottom: 15px;
    right: 15px;
    width: 40px;
    height: 40px;
  }
  .progress-circle-bg,
  .progress-circle-fill {
    r: 16;
    stroke-dasharray: 100.5; /* 2πr */
    stroke-dashoffset: 100.5;
  }
  .scroll-icon {
    width: 30px;
    height: 30px;
  }
  .scroll-icon svg {
    width: 20px;
    height: 20px;
  }
}