/* ===== UI: прелоудер, прогресс, курсор, тосты, кнопка наверх ===== */

/* --- ПРЕЛОУДЕР --- */
.preloader {
  position: fixed;
  inset: 0;
  z-index: 10000;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 22px;
  background: var(--bg);
  transition: opacity 0.6s ease, visibility 0.6s ease;
}

.preloader.hidden {
  opacity: 0;
  visibility: hidden;
}

.preloader-mark {
  animation: preloaderBreath 1.4s ease-in-out infinite;
}

.preloader-text {
  font-family: var(--font-display);
  font-size: 20px;
  letter-spacing: 10px;
  text-transform: uppercase;
  color: var(--muted);
}

.preloader-bar {
  width: 180px;
  height: 2px;
  background: var(--line);
  border-radius: 2px;
  overflow: hidden;
}

.preloader-bar span {
  display: block;
  height: 100%;
  width: 40%;
  background: linear-gradient(90deg, var(--gold-deep), var(--gold-bright));
  animation: preloaderSlide 1.1s ease-in-out infinite;
}

/* --- ПРОГРЕСС ЧТЕНИЯ --- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 9000;
  background: transparent;
}

.scroll-progress span {
  display: block;
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--gold-deep), var(--gold-bright));
  box-shadow: 0 0 12px rgba(201, 168, 106, 0.5);
  transition: width 0.08s linear;
}

/* --- КАСТОМНЫЙ КУРСОР --- */
.cursor-dot,
.cursor-ring {
  position: fixed;
  top: 0;
  left: 0;
  pointer-events: none;
  z-index: 10001;
  border-radius: 50%;
  transform: translate(-50%, -50%);
  will-change: transform;
}

.cursor-dot {
  width: 6px;
  height: 6px;
  background: var(--gold);
}

.cursor-ring {
  width: 34px;
  height: 34px;
  border: 1px solid rgba(201, 168, 106, 0.55);
  transition: width 0.25s var(--ease), height 0.25s var(--ease), border-color 0.25s, background 0.25s;
}

.cursor-ring.is-hovering {
  width: 56px;
  height: 56px;
  border-color: var(--gold);
  background: var(--gold-soft);
}

@media (pointer: coarse) {
  .cursor-dot, .cursor-ring { display: none; }
}

/* --- КНОПКА НАВЕРХ --- */
.to-top {
  position: fixed;
  right: 26px;
  bottom: 26px;
  z-index: 8000;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: 1px solid var(--gold-line);
  background: rgba(18, 18, 24, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--gold-bright);
  font-size: 20px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
  opacity: 0;
  visibility: hidden;
  transform: translateY(16px);
  transition: opacity 0.35s var(--ease), transform 0.35s var(--ease), visibility 0.35s;
}

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

.to-top:hover {
  background: var(--gold);
  color: #15130e;
  border-color: var(--gold);
}

/* --- ТОСТЫ --- */
.toast-wrap {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 10002;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 20px;
  border-radius: 14px;
  background: var(--panel-2);
  border: 1px solid var(--gold-line);
  box-shadow: var(--shadow);
  color: var(--text);
  font-size: 14px;
  font-weight: 600;
  opacity: 0;
  transform: translateY(12px) scale(0.97);
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease);
}

.toast.show {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.toast-icon {
  color: var(--gold);
}

/* --- АНИМАЦИИ КОМПОНЕНТОВ UI --- */
@keyframes preloaderBreath {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.7; transform: scale(0.94); }
}

@keyframes preloaderSlide {
  0% { transform: translateX(-110%); }
  100% { transform: translateX(280%); }
}