/*
 * qol.css
 * Quality-of-life UI enhancements
 * Scroll-to-top, section dots, toast notifications, focus outlines,
 * lazy-load fade-in, copy tooltip
 */

/* ---------- SCROLL-TO-TOP BUTTON ---------- */
.scroll-top-btn {
  position: fixed;
  bottom: 2rem;
  right: 5.5rem;
  width: 3.6rem;
  height: 3.6rem;
  border-radius: 50%;
  background: var(--color-bg-card);
  border: 2px solid var(--color-border);
  color: var(--color-text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 900;
  opacity: 0;
  visibility: hidden;
  transform: translateY(1rem);
  transition: opacity 0.35s ease, visibility 0.35s ease, transform 0.35s ease,
              background-color 0.25s ease, border-color 0.25s ease;
  font-size: 1.6rem;
}

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

.scroll-top-btn:hover {
  background: var(--color-accent-1);
  border-color: var(--color-accent-1);
  transform: translateY(-3px);
}

/* SVG progress ring around the button */
.scroll-top-btn svg.progress-ring {
  position: absolute;
  top: -3px;
  left: -3px;
  width: calc(100% + 6px);
  height: calc(100% + 6px);
  transform: rotate(-90deg);
  pointer-events: none;
}

.scroll-top-btn i {
  position: relative;
  z-index: 1;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.scroll-top-btn .progress-ring__circle {
  fill: none;
  stroke: var(--color-accent-1);
  stroke-width: 2.5;
  transition: stroke-dashoffset 0.15s ease;
}

/* ---------- SECTION NAV DOTS ---------- */
.section-dots {
  position: fixed;
  left: 2rem;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  z-index: 800;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.4s ease, visibility 0.4s ease;
}

.section-dots.visible {
  opacity: 1;
  visibility: visible;
}

.section-dot {
  width: 1rem;
  height: 1rem;
  border-radius: 50%;
  background: var(--color-text-tertiary);
  border: none;
  cursor: pointer;
  transition: background 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
  position: relative;
  padding: 0;
}

.section-dot::before {
  content: attr(data-label);
  position: absolute;
  left: 2rem;
  top: 50%;
  transform: translateY(-50%);
  background: var(--color-bg-card);
  color: var(--color-text-primary);
  font-size: 1.2rem;
  padding: 0.3rem 0.8rem;
  border-radius: 0.3rem;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease, left 0.25s ease;
}

.section-dot:hover::before {
  opacity: 1;
  left: 2.4rem;
}

.section-dot.active {
  background: var(--color-accent-1);
  transform: scale(1.4);
  box-shadow: 0 0 8px rgba(var(--color-accent-1-rgb), 0.5);
}

/* ---------- TOAST NOTIFICATIONS ---------- */
.toast-container {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 9000;
  display: flex;
  flex-direction: column-reverse;
  gap: 0.8rem;
  pointer-events: none;
}

.toast {
  background: var(--color-bg-card);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
  padding: 1rem 2rem;
  border-radius: 0.6rem;
  font-size: 1.4rem;
  display: flex;
  align-items: center;
  gap: 0.8rem;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
  pointer-events: auto;
  opacity: 0;
  transform: translateY(1rem);
  animation: toastIn 0.35s ease forwards;
  max-width: 40rem;
}

.toast.toast-out {
  animation: toastOut 0.3s ease forwards;
}

.toast--success { border-left: 3px solid var(--color-success); }
.toast--error   { border-left: 3px solid var(--color-error); }
.toast--info    { border-left: 3px solid var(--color-info); }

.toast i {
  font-size: 1.6rem;
  flex-shrink: 0;
}

.toast--success i { color: var(--color-success); }
.toast--error i   { color: var(--color-error); }
.toast--info i    { color: var(--color-info); }

@keyframes toastIn {
  to { opacity: 1; transform: translateY(0); }
}

@keyframes toastOut {
  from { opacity: 1; transform: translateY(0); }
  to   { opacity: 0; transform: translateY(1rem); }
}

/* ---------- FOCUS-VISIBLE OUTLINES ---------- */
*:focus {
  outline: none;
}

*:focus-visible {
  outline: 2px solid var(--color-accent-1);
  outline-offset: 3px;
  border-radius: 2px;
}

/* Specific overrides for buttons and links */
.btn:focus-visible,
.social-link:focus-visible,
.project-card:focus-visible,
.nav-links a:focus-visible {
  outline: 2px solid var(--color-accent-1);
  outline-offset: 4px;
}

/* ---------- LAZY-LOAD FADE-IN ---------- */
img.lazy-img {
  opacity: 0;
  transition: opacity 0.6s ease;
}

img.lazy-img.loaded {
  opacity: 1;
}

/* Placeholder shimmer while loading */
img.lazy-img:not(.loaded) {
  background: linear-gradient(
    110deg,
    var(--color-bg-tertiary) 30%,
    var(--color-bg-secondary) 50%,
    var(--color-bg-tertiary) 70%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
}

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

/* ---------- COPY TOOLTIP ---------- */
.copy-tooltip {
  position: relative;
}

.copy-tooltip::after {
  content: 'Click to copy';
  position: absolute;
  bottom: calc(100% + 0.6rem);
  left: 50%;
  transform: translateX(-50%) translateY(0.4rem);
  background: var(--color-bg-card);
  color: var(--color-text-primary);
  font-size: 1.1rem;
  padding: 0.3rem 0.8rem;
  border-radius: 0.3rem;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
  z-index: 100;
}

.copy-tooltip:hover::after {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.copy-tooltip.copied::after {
  content: 'Copied!';
  color: var(--color-success);
}

/* ---------- RESPONSIVE ADJUSTMENTS ---------- */
@media (max-width: 767px) {
  .section-dots {
    display: none;
  }

  .scroll-top-btn {
    bottom: 1.2rem;
    right: 4.5rem;
    width: 3.2rem;
    height: 3.2rem;
  }

  .toast {
    max-width: calc(100vw - 3rem);
    font-size: 1.3rem;
    padding: 0.8rem 1.4rem;
  }
}

/* ---------- REDUCED MOTION ---------- */
@media (prefers-reduced-motion: reduce) {
  .scroll-top-btn,
  .section-dot,
  .toast,
  img.lazy-img {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}