/* Базовый transition для плавности */
body {
  transition: transform 0.8s ease, filter 0.8s ease, opacity 0.8s ease;
}

/* =====================
   1. Переворот
===================== */
body.effect-flip {
  transform: rotate(180deg);
}

/* =====================
   2. Тряска
===================== */
body.effect-shake {
  animation: shake 0.4s infinite;
}

@keyframes shake {
  0% {
    transform: translateX(0);
  }

  25% {
    transform: translateX(-10px);
  }

  50% {
    transform: translateX(10px);
  }

  75% {
    transform: translateX(-10px);
  }

  100% {
    transform: translateX(0);
  }
}

/* =====================
   3. Размытие
===================== */
body.effect-blur {
  filter: blur(6px);
}

/* =====================
   4. Зум
===================== */
body.effect-zoom {
  transform: scale(1.3);
}

/* =====================
   5. Волна
===================== */
body.effect-wave {
  animation: wave 1.2s ease-in-out infinite;
}

@keyframes wave {
  0% {
    transform: skewX(0deg);
  }

  25% {
    transform: skewX(6deg);
  }

  50% {
    transform: skewX(-6deg);
  }

  75% {
    transform: skewX(3deg);
  }

  100% {
    transform: skewX(0deg);
  }
}

/* =====================
   6. Глюк
===================== */
body.effect-glitch {
  animation: glitch 0.3s infinite;
}

@keyframes glitch {
  0% {
    transform: translate(0);
  }

  20% {
    transform: translate(-2px, 2px);
  }

  40% {
    transform: translate(2px, -2px);
  }

  60% {
    transform: translate(-2px, -2px);
  }

  80% {
    transform: translate(2px, 2px);
  }

  100% {
    transform: translate(0);
  }
}

/* =====================
   7. Поворот
===================== */
body.effect-rotate {
  transform: rotate(20deg);
}

/* =====================
   8. Скос
===================== */
body.effect-skew {
  transform: skew(15deg, 5deg);
}

/* =====================
   9. Затухание
===================== */
body.effect-fade {
  opacity: 0.3;
}

/* =====================
   10. Инверсия
===================== */
body.effect-invert {
  filter: invert(1);
}

/* контейнер */
#glass-rain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  overflow: hidden;
}

/* эффект стекла */
body.effect-rain-glass {
  filter: blur(1.5px) contrast(1.05) saturate(0.1);
}

/* капля */

.drop {
  position: absolute;

  background: rgba(255, 255, 255, 0.18);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);

  border-radius:
    50% 50% 55% 55% / 60% 60% 40% 40%;

  box-shadow:
    inset 6px 6px 10px rgba(255, 255, 255, 0.6),
    inset -8px -10px 12px rgba(0, 0, 0, 0.08),
    0 8px 20px rgba(0, 0, 0, 0.12);

  will-change: transform;
}

.drop::before {
  content: "";
  position: absolute;
  top: 12px;
  left: 14px;

  width: 18px;
  height: 28px;

  background: radial-gradient(ellipse at top left,
      rgba(255,255,255,.9),
      rgba(255,255,255,.2) 60%,
      transparent);

  border-radius: 50%;
  filter: blur(.5px);
}