.prtn{
  --accent:#B4CF32;
  --ink:#C0C0C0;
  --ink-strong:#E9E9E9;
  --glass:rgba(12,14,18,.66);
  --stroke:rgba(255,255,255,.12);
  --shadow:0 14px 36px rgba(0,0,0,.55);
  color:var(--ink);
  padding:clamp(44px,6vw,110px) 0;
  position:relative;
}
.prtn::before{
  content:"";
  position:absolute; inset:0; z-index:0;
    background:
    radial-gradient(900px 600px at 50% 0, rgba(0,0,0,.22), transparent 70%),
    rgba(0,0,0,.42);
}
.prtn__inner{ position:relative; z-index:1; max-width:1100px; margin:0 auto; padding:0 clamp(16px,3vw,32px); }

.prtn__header{ margin-bottom:clamp(22px,3.5vw,36px); text-align:left; }
.prtn__title{
  margin:0 0 10px; font-weight:900; line-height:1.06;
  font-size:clamp(28px,4.4vw,44px); color:var(--ink-strong);
}
.prtn__rule{
  display:inline-block; height:3px; width:min(260px,40%);
  border-radius:999px;
  background:linear-gradient(90deg, transparent, var(--ink-strong), transparent);
  filter:drop-shadow(0 2px 4px rgba(0,0,0,.35));
  margin-bottom:12px;
}
.prtn__lead{
  margin:0; max-width:70ch;
  color:var(--ink-strong); opacity:.92; line-height:1.8;
  font-size:clamp(16px,1.6vw,18px);
}

.prtn__notice{
  margin: 12px 0 0;
  padding:10px 12px; border-radius:10px; font-weight:800;
  border:1px solid var(--stroke);
  background:rgba(255,255,255,.06);
  color:var(--ink-strong);
}
.prtn__notice--ok{
  border-color: color-mix(in oklab, var(--accent) 40%, transparent);
  background: color-mix(in oklab, var(--accent) 12%, transparent);
}
.prtn__notice--err{
  border-color: rgba(255,110,110,.45);
  background: rgba(255,110,110,.10);
}

.prtn__form{
  margin-top:clamp(18px,3vw,28px);
  background:var(--glass);
  -webkit-backdrop-filter: blur(10px) saturate(120%);
  backdrop-filter: blur(10px) saturate(120%);
  border:1px solid var(--stroke);
  box-shadow:var(--shadow);
  border-radius:18px;
  padding:clamp(16px,2.2vw,24px);
}

.prtn__grid{
  display:grid;
  grid-template-columns:repeat(2, minmax(0,1fr));
  gap:14px 16px;
}
@media (max-width:780px){
  .prtn__grid{ grid-template-columns:1fr; }
}
.prtn__field{ display:grid; gap:6px; min-width:0; }
.prtn__field--full{ grid-column:1 / -1; }

.prtn__label{ font-weight:800; color:var(--ink-strong); font-size:.95rem; }
.prtn__input,
.prtn__textarea{
  width:100%; min-width:0;
  padding:12px 14px;
  border-radius:12px;
  border:1px solid var(--stroke);
  background:rgba(15,18,24,.72);
  color:var(--ink-strong);
  outline:none;
}
.prtn__textarea{ min-height:120px; resize:vertical; }
.prtn__input::placeholder,
.prtn__textarea::placeholder{ color:#aeb5bb; opacity:.9; }

.prtn__input:focus,
.prtn__textarea:focus{
  border-color:color-mix(in oklab, var(--accent) 65%, transparent);
  box-shadow:0 0 0 3px color-mix(in oklab, var(--accent) 30%, transparent);
}
.prtn__field.is-error .prtn__input,
.prtn__field.is-error .prtn__textarea{
  border-color:rgba(255,110,110,.6);
  box-shadow:0 0 0 3px rgba(255,110,110,.25);
}

.prtn__agree{
  display:flex; align-items:flex-start; gap:10px;
  font-size:.95rem; line-height:1.5;
}
.prtn__agree input{ margin-top:.35em; }

.prtn__actions{ margin-top:10px; display:flex; gap:12px; }
.prtn__btn{
  display:inline-flex; align-items:center; justify-content:center;
  padding:12px 18px; border-radius:12px; border:0; cursor:pointer;
  background:var(--accent); color:#0b0e13; font-weight:900;
  box-shadow:0 12px 26px rgba(0,0,0,.5);
}
.prtn__btn:hover{ filter:brightness(1.05); transform:translateY(-1px); }

.prtn__hp{ position:absolute; left:-9999px; width:1px; height:1px; opacity:0; }

.prtn, .prtn *{ box-sizing:border-box; }