/* 03 · Подход — траектория с планетами и пять этапов */

/* ——— траектория ——— */
.traj {
  position: relative;
  height: calc(300px * var(--k,1));
  margin-top: 72px;
}

.traj-stage {
  position: absolute;
  left: 0;
  top: 0;
  width: 1280px;
  height: 300px;
  transform-origin: 0 0;
  transform: scale(var(--k,1));
}

.traj-path {
  stroke-dasharray: 1 1;
  stroke-dashoffset: 0;
}

.traj[data-pending] .traj-path {
  stroke-dashoffset: 1;
}

.traj[data-in] .traj-path {
  animation: draw 2.6s cubic-bezier(.5,.1,.2,1) .2s both;
}

@keyframes draw {
  from {
    stroke-dashoffset: 1;
  }
  to {
    stroke-dashoffset: 0;
  }
}

.planet {
  position: absolute;
  border-radius: 50%;
  transform: translate(-50%,-50%);
}

.comet {
  position: absolute;
  left: 0;
  top: 0;
  width: 120px;
  height: 10px;
  offset-path: path('M -200 262 C -120.3 246.0, -45.7 237.3, 30 214 C 105.7 190.7, 201.3 125.7, 286 122 C 370.7 118.3, 457.7 196.0, 542 192 C 626.3 188.0, 712.3 105.0, 798 98 C 883.7 91.0, 965.7 158.0, 1054 150 C 1142.3 142.0, 1269.3 72.3, 1420 24');
  offset-rotate: auto;
  offset-anchor: 115px 5px;
  animation: fly 12s cubic-bezier(.42,0,.58,1) infinite;
  will-change: offset-distance;
}

.comet::before {
  content: "";
  position: absolute;
  right: 5px;
  top: 4px;
  width: 115px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg,rgba(255,77,0,0),rgba(255,77,0,.4) 55%,rgba(255,150,100,1));
}

.comet::after {
  content: "";
  position: absolute;
  right: 0;
  top: 0;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #FFE3D6;
  box-shadow: 0 0 0 2px var(--accent),
    0 0 18px 6px rgba(255,77,0,.6),
    0 0 50px 16px rgba(255,77,0,.22);
}

@keyframes fly {
  0% {
    offset-distance: 0%;
    opacity: 0;
  }
  8% {
    opacity: 1;
  }
  92% {
    opacity: 1;
  }
  100% {
    offset-distance: 100%;
    opacity: 0;
  }
}

.steps {
  display: grid;
  grid-template-columns: repeat(5,minmax(0,1fr));
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid rgba(255,255,255,.1);
}

.step {
  position: relative;
  padding: 28px 24px 0 0;
  min-width: 0;
}

.step::before {
  content: "";
  position: absolute;
  left: calc(30px * var(--k,1));
  top: -1px;
  width: 9px;
  height: 9px;
  margin: -4px 0 0 -4.5px;
  border-radius: 50%;
  background: var(--bg);
  border: 1px solid rgba(255,255,255,.55);
}

.step-n {
  font: 400 13px/1 var(--f-disp);
  letter-spacing: .12em;
  color: #80868F;
}

.step-h {
  margin: 10px 0 0;
  font: 600 clamp(18px,1.85vw,23px)/1.15 var(--f-disp);
  color: var(--ink2);
}

.step-p {
  margin: 12px 0 0;
  font-size: 14.5px;
  line-height: 1.6;
  color: #A1A5AE;
}

/* ——— адаптив ——— */
@keyframes rail-draw {
  from {
    transform: scaleY(0);
  }
  to {
    transform: scaleY(1);
  }
}

@keyframes rail-fly {
  0% {
    transform: translateY(0);
    opacity: 0;
  }
  8% {
    opacity: 1;
  }
  88% {
    opacity: 1;
  }
  100% {
    transform: translateY(100%);
    opacity: 0;
  }
}

.traj-stage > svg {
  position: absolute;
  left: 0;
  top: 0;
  overflow: visible;
}

/* финальная планета: кольцо и подсвеченное ядро */
.planet--ring {
  width: 170px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid rgba(255,122,69,.55);
  transform: translate(-50%,-50%) rotate(-12deg);
  box-shadow: 0 0 24px rgba(255,77,0,.25);
}

.planet--core {
  box-shadow: inset 12px 0 18px -6px rgba(255,77,0,.7),
    inset -8px -10px 20px rgba(0,0,0,.5),
    0 0 60px -10px rgba(255,77,0,.45);
}

@media (min-width:1500px) {
  /* широкий экран: концы траектории (и комета на финише) уже не уходят за край — растворяем их в фоне, а не обрываем в воздухе */
  .traj::before,
  .traj::after {
    content: "";
    position: absolute;
    top: -10px;
    bottom: -10px;
    z-index: 1;
    pointer-events: none;
  }
  .traj::before {
    left: -220px;
    width: 230px;
    background: linear-gradient(90deg,var(--bg) 10%,rgba(5,5,7,0));
  }
  .traj::after {
    right: -160px;
    width: 320px;
    background: linear-gradient(90deg,rgba(5,5,7,0),var(--bg) 88%);
  }
}

@media (max-width:960px) {
  /* шаги идут столбцом со своим рельсом и кометой — горизонтальная траектория с планетами здесь не нужна */
  .traj {
    display: none;
  }
  .steps {
    position: relative;
    grid-template-columns: minmax(0,1fr);
    border-top: 0;
    margin-top: 44px;
    border-left: 1px solid rgba(255,255,255,.14);
    padding-left: 26px;
  }
  .step {
    padding: 0 0 30px;
  }
  .step::before {
    left: -31px;
    top: 6px;
    margin: 0;
  }
  .step-h {
    font-size: 23px;
  }
  /* вертикальная траектория: рельс прорисовывается оранжевым, по нему летит комета */
  .steps::before {
    content: "";
    position: absolute;
    left: -1px;
    top: 0;
    bottom: 0;
    width: 1px;
    background: linear-gradient(180deg,rgba(255,122,69,.95),rgba(255,255,255,.5) 55%,rgba(255,255,255,.14));
    transform-origin: 50% 0;
  }
  .steps:has(> .step[data-pending])::before {
    transform: scaleY(0);
  }
  .steps:has(> .step[data-in])::before {
    animation: rail-draw 2.2s cubic-bezier(.5,.1,.2,1) .15s both;
  }
  .steps::after {
    content: "";
    position: absolute;
    left: -14.5px;
    top: -34px;
    width: 28px;
    height: 100%;
    pointer-events: none;
    opacity: 0;
    background: radial-gradient(circle at 50% 30px,#FFE3D6 0 3.5px,var(--accent) 4px 5.5px,rgba(255,77,0,.4) 6px,rgba(255,77,0,0) 14px) no-repeat,
      linear-gradient(180deg,rgba(255,77,0,0),rgba(255,150,100,.9)) 13.5px 0/2px 26px no-repeat;
  }
  .steps:has(> .step[data-in])::after {
    animation: rail-fly 7s cubic-bezier(.42,0,.58,1) 1.2s infinite;
  }
}