/* ============================================================
   BYPLAN — principles-slider.css
   Scope: #principles only
   Purpose: split "Делаем / Не делаем" into 2 animated screens
   ============================================================ */

#principles .principles-slider{
  margin-top: 18px;
}

#principles .principles-slider__top{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

/* Tabs */
#principles .principles-tabs{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px;
  border-radius: 999px;
  border: 1px solid rgba(0,0,0,.10);
  background: rgba(255,255,255,.22);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.30);
}

#principles .principles-tab{
  appearance: none;
  border: 0;
  background: transparent;
  color: rgba(28,27,27,.78);
  border-radius: 999px;
  padding: 10px 14px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 750;
  line-height: 1;
  transition:
    background 220ms var(--ease-out, cubic-bezier(.2,.8,.2,1)),
    box-shadow 220ms var(--ease-out, cubic-bezier(.2,.8,.2,1)),
    transform 220ms var(--ease-out, cubic-bezier(.2,.8,.2,1)),
    color 220ms var(--ease-out, cubic-bezier(.2,.8,.2,1));
}

#principles .principles-tab__icon{
  width: 26px;
  height: 26px;
  border-radius: 999px;
  display: grid;
  place-items: center;
  font-weight: 900;
  font-size: 14px;
  border: 1px solid rgba(0,0,0,.10);
  background: rgba(255,255,255,.40);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.35);
}

/* Slightly different tint for the icons */
#principles .principles-tab[data-index="0"] .principles-tab__icon{
  background: rgba(72, 168, 114, .16);
  border-color: rgba(72, 168, 114, .30);
}
#principles .principles-tab[data-index="1"] .principles-tab__icon{
  background: rgba(210, 92, 92, .14);
  border-color: rgba(210, 92, 92, .28);
}

#principles .principles-tab:hover{
  background: rgba(255,255,255,.30);
  transform: translateY(-1px);
}

#principles .principles-tab.is-active{
  background: rgba(255,255,255,.70);
  color: rgba(28,27,27,.92);
  box-shadow: 0 14px 34px rgba(0,0,0,.12);
}

#principles .principles-hint{
  font-size: 0.95rem;
  opacity: .85;
}

/* Carousel */
#principles .principles-carousel{
  margin-top: 14px;
}

#principles .principles-carousel__viewport{
  overflow: hidden;
  border-radius: var(--radius, 26px);
  outline: none;
  touch-action: pan-y;
}

#principles .principles-carousel__track{
  display: flex;
  width: 200%;
  transform: translateX(0%);
  transition: transform 520ms var(--ease-out, cubic-bezier(.2,.8,.2,1));
  will-change: transform;
}

#principles .principles-slider[data-index="1"] .principles-carousel__track{
  transform: translateX(-50%);
}

/* Slide card */
#principles .principles-slide{
  flex: 0 0 50%;
  padding: 22px 22px 18px;
  position: relative;
  overflow: hidden;

  border: 1px solid rgba(0,0,0,.08);
  background: rgba(255,255,255,.60);
  box-shadow: 0 14px 38px rgba(0,0,0,.14);
}

/* Inner spacing on small screens */
@media (max-width: 640px){
  #principles .principles-slide{ padding: 18px 16px 14px; }
}

/* Decorative blob */
#principles .principles-slide::before{
  content: "";
  position: absolute;
  width: 420px;
  height: 420px;
  right: -220px;
  top: -220px;
  border-radius: 50%;
  filter: blur(2px);
  opacity: .55;
}

#principles .principles-slide.is-do::before{
  background: radial-gradient(circle at 30% 30%, rgba(72,168,114,.50), rgba(72,168,114,0) 62%);
}

#principles .principles-slide.is-dont::before{
  background: radial-gradient(circle at 30% 30%, rgba(210,92,92,.45), rgba(210,92,92,0) 62%);
}

/* Big mark */
#principles .principles-slide::after{
  content: "✓";
  position: absolute;
  right: -18px;
  top: -28px;
  font-size: 220px;
  font-weight: 900;
  line-height: 1;
  opacity: .08;
  transform: rotate(10deg);
}

#principles .principles-slide.is-dont::after{
  content: "✕";
  opacity: .075;
}

/* Floating motion for the big mark */
@media (prefers-reduced-motion: no-preference){
  #principles .principles-slide::after{
    animation: principles-mark-float 6.6s ease-in-out infinite;
  }
}

@keyframes principles-mark-float{
  0%, 100%{ transform: translate(0,0) rotate(10deg); }
  50%{ transform: translate(-10px, 10px) rotate(8deg); }
}

/* Head */
#principles .principles-slide__head{
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

#principles .principles-slide__mark{
  width: 42px;
  height: 42px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  font-weight: 900;
  font-size: 18px;
  border: 1px solid rgba(0,0,0,.10);
  background: rgba(255,255,255,.40);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.35);
}

#principles .principles-slide.is-do .principles-slide__mark{
  border-color: rgba(72, 168, 114, .32);
  background: rgba(72, 168, 114, .16);
}

#principles .principles-slide.is-dont .principles-slide__mark{
  border-color: rgba(210, 92, 92, .30);
  background: rgba(210, 92, 92, .14);
}

#principles .principles-slide__title{
  margin: 0;
}

/* List */
#principles .principles-list{
  position: relative;
  z-index: 1;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

#principles .principles-list li{
  display: grid;
  grid-template-columns: 22px 1fr;
  gap: 12px;
  align-items: start;
  padding: 12px 12px;
  border-radius: 16px;
  border: 1px solid rgba(0,0,0,.06);
  background: rgba(255,255,255,.28);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.28);
}

#principles .principles-list li::before{
  content: "✓";
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border-radius: 8px;
  font-weight: 900;
  font-size: 13px;
  border: 1px solid rgba(0,0,0,.10);
  background: rgba(255,255,255,.40);
  margin-top: 1px;
}

#principles .principles-slide.is-do .principles-list li::before{
  background: rgba(72,168,114,.16);
  border-color: rgba(72,168,114,.30);
  content: "✓";
}

#principles .principles-slide.is-dont .principles-list li::before{
  background: rgba(210,92,92,.14);
  border-color: rgba(210,92,92,.28);
  content: "✕";
}

/* Stagger reveal for the active slide */
@media (prefers-reduced-motion: no-preference){
  #principles .principles-slide.is-active .principles-list li{
    animation: principles-item-in 520ms var(--ease-out, cubic-bezier(.2,.8,.2,1)) both;
    animation-delay: calc(var(--i, 0) * 70ms);
  }
}

@keyframes principles-item-in{
  from{ opacity: 0; transform: translateY(10px); }
  to{ opacity: 1; transform: translateY(0); }
}

/* Dots */
#principles .principles-dots{
  margin-top: 12px;
  display: flex;
  justify-content: center;
  gap: 10px;
}

#principles .principles-dot{
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: rgba(0,0,0,.22);
  transition:
    width 240ms var(--ease-out, cubic-bezier(.2,.8,.2,1)),
    background 240ms var(--ease-out, cubic-bezier(.2,.8,.2,1)),
    opacity 240ms var(--ease-out, cubic-bezier(.2,.8,.2,1));
  opacity: .55;
}

#principles .principles-dot.is-active{
  width: 24px;
  background: rgba(0,0,0,.38);
  opacity: .9;
}

/* Reduced motion: keep everything snappy */
@media (prefers-reduced-motion: reduce){
  #principles .principles-carousel__track{ transition: none; }
  #principles .principles-slide::after{ animation: none; }
  #principles .principles-slide.is-active .principles-list li{ animation: none; }
}