/* ============================================================
   features.css — Features hub + six feature detail pages.
   Shared page-shell (page-*/sub-* classes) is also used by the
   polished inner pages (login, store, cart, wardrobe, device,
   dashboard, 404, 500) so every sub-page reads as one family.
   ============================================================ */

/* ============ SHARED PAGE SHELL ============ */
.page-shell{position:relative;z-index:2;padding:120px 0 110px;}
.page-hero{position:relative;padding:150px 0 40px;text-align:center;}
.page-hero .eyebrow{justify-content:center;}
.page-hero h1{font-size:clamp(32px,5vw,54px);margin-bottom:14px;}
.page-hero p{color:var(--text-2);font-size:16px;line-height:1.7;max-width:620px;margin:0 auto;}
.hero-media{
  max-width:980px;margin:44px auto 0;border-radius:26px;overflow:hidden;position:relative;
  border:1px solid rgba(255,255,255,.1);box-shadow:0 30px 80px rgba(0,0,0,.55), 0 0 60px rgba(123,46,255,.14);
}
.hero-media img{width:100%;display:block;}
.hero-media::after{content:'';position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg, rgba(7,7,13,0) 62%, rgba(7,7,13,.72));}

/* ============ SUB-PAGE SHELL (login, cart, device, dashboard, 404/500…) ============ */
.sub-shell{position:relative;z-index:2;display:flex;justify-content:center;padding:60px 24px 110px;}
.sub-card{
  width:100%;border-radius:26px;padding:42px 38px;position:relative;overflow:hidden;
  background:rgba(17,17,27,.6);border:1px solid rgba(255,255,255,.09);
  backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06), 0 24px 60px rgba(0,0,0,.45);
}
.sub-card::before{content:'';position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(420px 200px at 12% 0%, rgba(123,46,255,.13), transparent 65%);}
.sub-card > *{position:relative;}
.sub-narrow{max-width:460px;}
.sub-mid{max-width:640px;}
.sub-wide{max-width:880px;}
.sub-title{font-size:24px;margin-bottom:6px;}
.sub-lede{color:var(--text-2);font-size:14px;line-height:1.7;margin-bottom:26px;}
.stack > * + *{margin-top:18px;}
.divider{height:1px;background:var(--line);border:none;margin:22px 0;}
.muted{color:var(--text-2);}
.btn-block{width:100%;justify-content:center;}

/* Info rows used on dashboard / device / cart */
.info-row{display:flex;justify-content:space-between;align-items:center;gap:14px;padding:13px 0;border-bottom:1px solid var(--line);font-size:14px;}
.info-row:last-child{border-bottom:none;}
.info-row .k{color:var(--text-2);}
.info-row .v{font-weight:600;}

/* ============ FEATURES HUB GRID ============ */
.feature-nav-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:22px;
  margin-top:56px;position:relative;z-index:1;
}
.feature-nav-card{
  display:flex;flex-direction:column;gap:12px;border-radius:var(--radius-lg);padding:28px;
  background:rgba(17,17,27,.55);border:1px solid rgba(255,255,255,.08);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.05), 0 14px 34px rgba(0,0,0,.28);
  transition:transform .45s var(--ease), border-color .45s, box-shadow .45s;
  position:relative;overflow:hidden;
}
.feature-nav-card::before{content:'';position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(420px 200px at 20% 0%, rgba(123,46,255,.14), transparent 65%);
  opacity:0;transition:opacity .5s;}
.feature-nav-card:hover{
  transform:translateY(-6px);border-color:rgba(176,92,255,.35);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.07), 0 26px 60px rgba(0,0,0,.5), 0 0 40px rgba(123,46,255,.12);
}
.feature-nav-card:hover::before{opacity:1;}
.feature-nav-card img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:14px;border:1px solid rgba(255,255,255,.09);}
.feature-nav-card h3{font-size:17.5px;display:flex;align-items:center;gap:10px;}
.feature-nav-card p{color:var(--text-2);font-size:14px;line-height:1.65;flex:1;}
.feature-nav-card .fn-cta{
  font-family:var(--btn-font);font-size:13px;font-weight:600;color:var(--secondary);
  display:inline-flex;align-items:center;gap:7px;transition:gap .25s var(--ease), color .25s;
}
.feature-nav-card:hover .fn-cta{gap:12px;color:var(--accent);}

/* ============ FEATURE DETAIL PAGE ============ */
.feature-article{max-width:860px;margin:0 auto;}
.feature-article section{margin-bottom:46px;}
.feature-article h2{font-size:22px;margin-bottom:14px;}
.feature-article p{color:var(--text-2);font-size:15px;line-height:1.75;margin-bottom:14px;}
.check-list{list-style:none;margin:18px 0;}
.check-list li{padding:9px 0;color:var(--text);font-size:14.5px;display:flex;gap:11px;align-items:baseline;border-bottom:1px dashed rgba(255,255,255,.07);}
.check-list li::before{content:'✓';color:var(--success);font-weight:700;flex-shrink:0;}
.check-list li span{color:var(--text-2);}
.step-list{list-style:none;counter-reset:steps;margin:18px 0;}
.step-list li{counter-increment:steps;position:relative;padding:10px 0 10px 52px;color:var(--text);font-size:14.5px;min-height:40px;}
.step-list li::before{
  content:counter(steps);position:absolute;left:0;top:6px;width:32px;height:32px;
  display:flex;align-items:center;justify-content:center;border-radius:10px;
  font-family:var(--btn-font);font-weight:700;font-size:14px;
  background:linear-gradient(135deg, rgba(123,46,255,.25), rgba(63,140,255,.2));
  border:1px solid rgba(176,92,255,.3);color:#fff;
}
.step-list li span{color:var(--text-2);}
.shot-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:26px 0;}
.shot-grid figure{margin:0;}
.shot-grid img{width:100%;border-radius:16px;border:1px solid rgba(255,255,255,.09);box-shadow:0 16px 40px rgba(0,0,0,.4);transition:transform .4s var(--ease);}
.shot-grid img:hover{transform:scale(1.015);}
.shot-grid figcaption{font-size:12.5px;color:var(--text-2);margin-top:9px;text-align:center;}
.shot-wide{width:100%;border-radius:18px;border:1px solid rgba(255,255,255,.09);box-shadow:0 20px 50px rgba(0,0,0,.4);margin:26px 0;}
.feature-back{display:inline-flex;align-items:center;gap:8px;color:var(--text-2);font-size:13.5px;font-family:var(--btn-font);margin-bottom:26px;transition:color .2s;}
.feature-back:hover{color:#fff;}

/* Prev/next pager between feature pages */
.feat-pager{display:flex;justify-content:space-between;gap:16px;margin-top:56px;padding-top:26px;border-top:1px solid var(--line);}
.feat-pager a{
  flex:1;padding:16px 18px;border-radius:16px;text-align:left;
  background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.08);
  transition:border-color .25s, background .25s, transform .25s var(--ease);
}
.feat-pager a:hover{border-color:rgba(176,92,255,.4);background:rgba(123,46,255,.07);transform:translateY(-3px);}
.feat-pager a.next{text-align:right;}
.feat-pager .dir{display:block;font-size:11.5px;color:var(--text-2);letter-spacing:.1em;text-transform:uppercase;margin-bottom:4px;font-family:var(--btn-font);}
.feat-pager .name{font-family:var(--head-font);font-size:14.5px;color:#fff;}

/* ============ RESPONSIVE ============ */
@media (max-width:980px){
  .feature-nav-grid{grid-template-columns:repeat(2,1fr);}
  .sub-card{padding:34px 28px;}
}
@media (max-width:640px){
  .feature-nav-grid{grid-template-columns:1fr;}
  .shot-grid{grid-template-columns:1fr;}
  .page-hero{padding:120px 0 24px;}
  .sub-card{padding:28px 22px;border-radius:20px;}
  .feat-pager{flex-direction:column;}
}