/* ============ INSTALL GUIDE ============ */
.install-guide{
  max-width:1180px;margin:0 auto;padding:64px 20px;
}
.install-guide__title{
  font-size:clamp(24px,3.4vw,36px);text-align:center;margin:0 0 12px;color:var(--text);
}
.install-guide__lead{
  text-align:center;color:var(--text-dim);max-width:720px;margin:0 auto 36px;font-size:16px;line-height:1.6;
}
.install-tabs{position:relative}
.install-tabs__radio{position:absolute;opacity:0;pointer-events:none}
.install-tabs__labels{
  display:flex;gap:8px;margin-bottom:28px;justify-content:center;flex-wrap:wrap;
}
.install-tabs__label{
  display:inline-flex;align-items:center;padding:12px 24px;border-radius:12px;
  background:rgba(19,37,82,.5);border:1px solid var(--border);color:var(--text-dim);
  font-weight:600;cursor:pointer;transition:all .2s ease;font-size:15px;
}
.install-tabs__label:hover{color:var(--text);border-color:var(--accent)}
.install-tabs__panel{display:none}
#tab-android:checked ~ .install-tabs__labels .install-tabs__label--android,
#tab-ios:checked ~ .install-tabs__labels .install-tabs__label--ios{
  background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#0a1730;border-color:transparent;
  box-shadow:0 6px 18px rgba(0,180,255,.3);
}
#tab-android:checked ~ .install-tabs__panel--android{display:block}
#tab-ios:checked ~ .install-tabs__panel--ios{display:block}

.install-download{
  display:flex;align-items:center;gap:16px;flex-wrap:wrap;justify-content:center;
  padding:20px;margin-bottom:32px;background:rgba(19,37,82,.4);border:1px solid var(--border);border-radius:14px;
}
.install-download__btn{
  display:inline-block;padding:14px 28px;background:linear-gradient(135deg,var(--accent),var(--accent-2));
  color:#0a1730;font-weight:800;text-decoration:none;border-radius:10px;font-size:15px;
  box-shadow:0 6px 20px rgba(0,180,255,.3);transition:transform .15s ease;
}
.install-download__btn:hover{transform:translateY(-2px);color:#0a1730}
.install-download__meta{color:var(--text-dim);font-size:14px}

.install-steps{list-style:none;padding:0;margin:0;display:grid;gap:16px}
.install-steps__item{
  display:flex;gap:20px;padding:20px;background:rgba(19,37,82,.4);
  border:1px solid var(--border);border-radius:14px;
  transition:border-color .2s ease,transform .2s ease;
}
.install-steps__item:hover{border-color:var(--accent);transform:translateX(4px)}
.install-steps__num{
  flex:0 0 40px;width:40px;height:40px;border-radius:50%;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  display:inline-flex;align-items:center;justify-content:center;
  font-weight:800;color:#0a1730;font-size:16px;
}
.install-steps__body{flex:1;min-width:0}
.install-steps__title{margin:0 0 8px;font-size:17px;color:var(--text)}
.install-steps__body p{margin:0;color:var(--text-dim);font-size:14px;line-height:1.6}

/* ============ REVIEWS ============ */
.reviews{max-width:1180px;margin:0 auto;padding:64px 20px}
.reviews__title{font-size:clamp(24px,3.4vw,36px);text-align:center;margin:0 0 12px}
.reviews__subtitle{text-align:center;color:var(--text-dim);margin:0 auto 36px;max-width:720px;font-size:16px}
.reviews__grid{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:20px;
}
.review-card{
  background:rgba(19,37,82,.5);border:1px solid var(--border);border-radius:16px;padding:22px;
  transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;
  display:flex;flex-direction:column;gap:12px;
}
.review-card:hover{transform:translateY(-4px);border-color:var(--accent);box-shadow:0 12px 32px rgba(0,180,255,.15)}
.review-card__head{display:flex;align-items:center;gap:12px}
.review-card__avatar{
  width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,#132552,#1a3170);
  display:inline-flex;align-items:center;justify-content:center;font-size:22px;flex-shrink:0;
}
.review-card__meta{flex:1;min-width:0}
.review-card__name{margin:0;font-weight:700;font-size:15px;color:var(--text)}
.review-card__city{margin:2px 0 0;font-size:12px;color:var(--text-dim)}
.review-card__rating{color:#ffc107;font-size:15px;letter-spacing:2px}
.review-card__text{margin:0;font-size:14px;line-height:1.6;color:var(--text-dim);flex:1}
.review-card__date{font-size:12px;color:#7b8ea8;font-style:italic}

/* ============ FAQ ============ */
.faq{max-width:960px;margin:0 auto;padding:64px 20px}
.faq__title{font-size:clamp(24px,3.4vw,36px);text-align:center;margin:0 0 12px}
.faq__subtitle{text-align:center;color:var(--text-dim);margin:0 auto 36px;max-width:720px;font-size:16px}
.faq__item{
  background:rgba(19,37,82,.4);border:1px solid var(--border);border-radius:12px;
  margin-bottom:10px;transition:border-color .2s ease;overflow:hidden;
}
.faq__item:hover{border-color:rgba(0,180,255,.5)}
.faq__item[open]{border-color:var(--accent);background:rgba(19,37,82,.65)}
.faq__question{
  padding:18px 22px;cursor:pointer;font-weight:600;font-size:16px;color:var(--text);
  list-style:none;position:relative;padding-right:52px;
  transition:color .18s ease;
}
.faq__question::-webkit-details-marker{display:none}
.faq__question::after{
  content:"+";position:absolute;right:22px;top:50%;transform:translateY(-50%);
  font-size:22px;font-weight:400;color:var(--accent);transition:transform .2s ease;
  width:24px;height:24px;display:inline-flex;align-items:center;justify-content:center;
}
.faq__item[open] .faq__question::after{content:"−";transform:translateY(-50%) rotate(180deg)}
.faq__question:hover{color:var(--accent)}
.faq__answer{padding:0 22px 20px;color:var(--text-dim);font-size:15px;line-height:1.65}
.faq__answer p{margin:0}

/* ============ ARTICLE ============ */
.article{
  max-width:820px;margin:0 auto;padding:64px 20px;
  background:rgba(15,30,66,.3);
}
.article h2{font-size:clamp(24px,3vw,32px);margin:0 0 20px}
.article h3{font-size:22px;margin:32px 0 14px;color:var(--accent)}
.article p{margin:0 0 16px;color:var(--text-dim);font-size:16px;line-height:1.75}
.article ul{margin:0 0 20px;padding-left:24px;color:var(--text-dim);font-size:16px;line-height:1.7}
.article ul li{margin-bottom:8px}
.article strong{color:var(--text)}
.author-card{
  margin-top:40px;padding:20px 24px;
  background:rgba(19,37,82,.5);border-left:3px solid var(--accent);border-radius:8px;
}
.author-card p{margin:0;font-size:14px;color:var(--text-dim);line-height:1.7}
.author-card strong{color:var(--text);font-size:15px}

/* ============ RESPONSIVE ============ */
@media (max-width:768px){
  .install-guide,.reviews,.faq,.article{padding:48px 16px}
  .install-steps__item{padding:16px;gap:14px}
  .install-steps__num{width:34px;height:34px;flex-basis:34px;font-size:14px}
  .install-steps__title{font-size:16px}
  .review-card{padding:18px}
  .faq__question{padding:16px 18px;padding-right:44px;font-size:15px}
  .faq__question::after{right:16px}
  .faq__answer{padding:0 18px 16px;font-size:14px}
}
@media (max-width:480px){
  .install-download{flex-direction:column;padding:16px}
  .install-download__btn{width:100%;text-align:center;box-sizing:border-box}
  .reviews__grid{grid-template-columns:1fr}
}