:root{
  --cert-max: 1120px;
  --cert-pad: 22px;

  --ink: rgba(0,0,0,.86);
  --soft: rgba(0,0,0,.72);
  --quiet: rgba(0,0,0,.42);

  --rule: rgba(0,0,0,.10);
  --card: rgba(0,0,0,.08);
}

/* page */
.cert{
  background:#fff;
}

.cert__wrap{
  max-width: var(--cert-max);
  margin: 0 auto;
  padding: 54px var(--cert-pad) 86px;
}

/* small captions */
.eyebrow{
  font-size: 11px;
  letter-spacing: .28em;
  text-transform: uppercase;
  color: var(--quiet);
  line-height: 1.2;
}
.eyebrow--right{ text-align:right; }

.rule{
  height:1px;
  background: var(--rule);
  margin: 40px 0;
}

/* title */
.cert__top{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  align-items:end;
}
.cert__title{
  margin: 18px 0 18px;
  font-size: clamp(44px, 6vw, 74px);
  line-height: .95;
  letter-spacing: -0.04em;
  font-weight: 600;
  color: var(--ink);
}

/* intro */
.cert__intro{
  display:grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 28px;
  align-items:start;
}

.lead{
  margin: 0;
  font-size: 18px;
  line-height: 1.65;
  color: var(--soft);
  max-width: 60ch;
}

.mini-meta{
  border-left: 1px solid var(--rule);
  padding-left: 18px;
}
.mini-meta__row{
  display:grid;
  grid-template-columns: 110px 1fr;
  gap: 12px;
  padding: 11px 0;
}
.mini-meta__row + .mini-meta__row{
  border-top: 1px solid rgba(0,0,0,.06);
}
.mini-meta__k{
  font-size: 11px;
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--quiet);
}
.mini-meta__v{
  font-size: 14px;
  line-height: 1.55;
  color: var(--soft);
}

/* grid */
.grid{
  display:grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.card{
  border: 1px solid var(--card);
  border-radius: 26px;
  padding: 18px 18px 20px;
  background:#fff;
}

.card__head{
  display:flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(0,0,0,.07);
  margin-bottom: 14px;
}

.badge{
  font-weight: 600;
  letter-spacing: .20em;
  text-transform: uppercase;
  font-size: 12px;
  color: var(--ink);
}

.tag{
  font-size: 11px;
  color: var(--quiet);
  letter-spacing: .24em;
  text-transform: uppercase;
}

/* logo block */
.logo{
  border: 1px solid rgba(0,0,0,.07);
  background: linear-gradient(180deg, rgba(0,0,0,.02), rgba(0,0,0,.01));
  border-radius: 22px;
  padding: 16px;
  display:flex;
  align-items:center;
  justify-content:center;
  overflow:hidden;
}

.logo img{
  max-width: 220px;
  width: 70%;
  height: auto;
  display:block;
  filter: saturate(.98);
}

/* text */
.card__text{
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--soft);
  max-width: 66ch;
}

/* details */
.details{
  margin-top: 14px;
  border-top: 1px solid rgba(0,0,0,.07);
  padding-top: 12px;
}

.details summary{
  cursor: pointer;
  list-style: none;
  font-size: 12px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: rgba(0,0,0,.70);
  font-weight: 600;
  user-select:none;
}

.details summary::-webkit-details-marker{ display:none; }

.details summary::after{
  content: "＋";
  float: right;
  color: rgba(0,0,0,.55);
}

.details[open] summary::after{
  content: "—";
}

.details ul{
  margin: 12px 0 0;
  padding-left: 18px;
  color: var(--soft);
  font-size: 14px;
  line-height: 1.75;
}

.details li{ margin: 6px 0; }

/* CTA like about */
.cta__inner{
  border: 1px solid var(--card);
  border-radius: 26px;
  padding: 20px;
  display:flex;
  justify-content: space-between;
  align-items:center;
  gap: 16px;
}

.cta__title{
  font-size: 18px;
  line-height: 1.35;
  margin-top: 10px;
  color: var(--ink);
  font-weight: 600;
  letter-spacing: -0.01em;
}

.cta__sub{
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--soft);
  max-width: 60ch;
}

/* btn (если уже есть общий — можно удалить этот блок) */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding: 12px 18px;
  border-radius: 999px;
  border: 1px solid rgba(0,0,0,.16);
  background:#fff;
  color: rgba(0,0,0,.82);
  text-decoration:none;
  font-weight:600;
  letter-spacing:.06em;
  text-transform:uppercase;
  font-size:12px;
  transition: transform .15s ease, border-color .15s ease;
}
.btn:hover{
  transform: translateY(-1px);
  border-color: rgba(0,0,0,.26);
}

/* responsive */
@media (max-width: 860px){
  .cert__wrap{ padding: 36px var(--cert-pad) 60px; }
  .cert__top{ grid-template-columns: 1fr; }
  .eyebrow--right{ text-align:left; }

  .cert__intro{ grid-template-columns: 1fr; }
  .mini-meta{
    border-left: 0;
    padding-left: 0;
    border-top: 1px solid var(--rule);
    padding-top: 14px;
  }

  .grid{ grid-template-columns: 1fr; }

  .cta__inner{
    flex-direction: column;
    align-items: flex-start;
  }

  .logo img{ width: 64%; }
}