@import url('https://fonts.googleapis.com/css2?family=Space+Mono:wght@400;700&display=swap');

:root{
  --black:#111111;
  --white:#ffffff;
  --gray:#8a8a8a;
  --gray-light:#c9c9c9;
  --line:#e6e6e6;
  --danger:#c0392b;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--white);
  color:var(--black);
  font-family:'Space Mono', monospace;
  font-size:12px;
  letter-spacing:.02em;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;cursor:pointer;background:none;border:none;color:inherit;}
input,textarea,select{font-family:inherit;}
.upper{text-transform:uppercase;}

/* ================= TOP BAR ================= */
.topbar{
  position:sticky;top:0;z-index:50;
  background:var(--white);
  display:flex;align-items:flex-start;justify-content:space-between;
  padding:22px 22px 10px;
}
.icon-btn{display:flex;align-items:center;gap:4px;font-size:11px;}
.icon-btn svg{display:block;}
.bag-count{
  font-size:10px;position:relative;top:-1px;
}
.cats{
  position:absolute;left:50%;top:22px;transform:translateX(-50%);
  display:flex;flex-wrap:wrap;justify-content:center;gap:0 14px;
  max-width:340px;text-align:center;
}
.cats button{
  font-size:10.5px;letter-spacing:.08em;text-transform:uppercase;
  color:var(--gray-light);padding:2px 0;
}
.cats button.active,.cats button:hover{color:var(--black);}
.back-btn{font-size:16px;}

/* ================= SCREENS ================= */
.screen{display:none;min-height:calc(100vh - 80px);}
.screen.active{display:block;}

/* ================= HOME GRID ================= */
.grid-wrap{padding:20px 22px 60px;}
.grid{
  display:grid;
  grid-template-columns:repeat(6,1fr);
  column-gap:14px;row-gap:34px;
}
.card{display:flex;flex-direction:column;align-items:center;cursor:pointer;}
.card-img{
  width:100%;aspect-ratio:1/1;
  display:flex;align-items:center;justify-content:center;
  padding:6px;
}
.card-img img{width:100%;height:100%;object-fit:contain;}
.card-code{
  margin-top:10px;font-size:10.5px;letter-spacing:.05em;
  text-transform:uppercase;color:var(--black);
}

/* ================= PRODUCT SCREEN ================= */
.product-view{
  max-width:640px;margin:0 auto;padding:30px 20px 80px;
  text-align:center;
}
.pv-stage{
  display:flex;align-items:center;justify-content:center;gap:22px;
  margin-bottom:10px;
}
.pv-arrow{font-size:20px;color:var(--black);padding:8px;flex:none;}
.pv-arrow[disabled]{color:var(--gray-light);cursor:default;}
.pv-imgwrap{width:340px;max-width:60vw;aspect-ratio:1/1;display:flex;align-items:center;justify-content:center;}
.pv-imgwrap img{width:100%;height:100%;object-fit:contain;}
.pv-dots{display:flex;justify-content:center;gap:6px;margin:14px 0 22px;}
.pv-dots span{width:4px;height:4px;border-radius:50%;background:var(--gray-light);}
.pv-dots span.active{background:var(--black);}

.pv-code{font-size:13px;letter-spacing:.05em;text-transform:uppercase;margin-bottom:6px;font-weight:700;}
.pv-price{font-size:12px;color:var(--black);margin-bottom:18px;}

.pv-plus-row{display:flex;justify-content:center;}
.pv-plus{
  font-size:22px;width:40px;height:40px;
  border:1px solid var(--black);border-radius:50%;
  display:flex;align-items:center;justify-content:center;
}

.pv-panel{max-width:420px;margin:0 auto;}
.pv-panel-head{
  display:flex;align-items:center;justify-content:space-between;
  margin-bottom:18px;
}
.pv-panel-head button{font-size:14px;}
.pv-panel-title{font-size:11px;letter-spacing:.1em;text-transform:uppercase;font-weight:700;}
.pv-panel-price{font-size:12px;margin-bottom:20px;}
.size-guide-tip{
  font-size:10px;color:var(--gray);margin:-10px 0 18px;display:none;
}
.size-guide-tip.show{display:block;}

.size-list{
  display:flex;justify-content:center;gap:26px;flex-wrap:wrap;margin-bottom:22px;
}
.size-list button{
  font-size:12px;letter-spacing:.05em;padding:6px 4px;border-bottom:1px solid transparent;
}
.size-list button:hover{border-color:var(--black);}
.size-list button.out{color:var(--gray-light);text-decoration:line-through;cursor:default;}

.info-toggle{
  font-size:10.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--gray);
  border-bottom:1px solid var(--gray-light);padding-bottom:2px;
}
.info-toggle:hover{color:var(--black);border-color:var(--black);}

.info-lines{display:none;text-align:center;margin-top:4px;}
.info-lines.show{display:block;}
.info-lines p{
  font-size:11px;letter-spacing:.03em;text-transform:uppercase;
  color:var(--black);margin:0 0 6px;
}

/* ================= CHECKOUT ================= */
.checkout-wrap{
  max-width:1100px;margin:0 auto;padding:26px 22px 90px;
  display:grid;grid-template-columns:1fr 1fr;gap:70px;
}
.co-left h4,.co-right h4{
  font-size:11px;letter-spacing:.1em;text-transform:uppercase;
  margin:0 0 16px;font-weight:700;
}
.section-block{margin-bottom:34px;}
.cod-banner{
  background:var(--black);color:var(--white);
  padding:16px;text-align:center;
  font-size:12px;letter-spacing:.1em;text-transform:uppercase;font-weight:700;
  margin-bottom:6px;
}
.cod-sub{font-size:10px;color:var(--gray);text-align:center;letter-spacing:.03em;}

.chk{display:flex;align-items:center;gap:8px;margin:14px 0 0;font-size:10.5px;color:var(--gray);}
.chk input{width:13px;height:13px;}

.f-row{display:flex;gap:14px;}
.f-group{margin-bottom:16px;flex:1;}
.f-group label{
  display:block;font-size:9.5px;letter-spacing:.08em;text-transform:uppercase;
  color:var(--gray);margin-bottom:7px;
}
.f-group input,.f-group select,.f-group textarea{
  width:100%;border:none;border-bottom:1px solid var(--line);
  padding:8px 0;font-size:12.5px;color:var(--black);
  background:transparent;border-radius:0;
}
.f-group input:focus,.f-group select:focus,.f-group textarea:focus{
  outline:none;border-color:var(--black);
}
.f-group input::placeholder,.f-group textarea::placeholder{color:var(--gray-light);}

.place-order-btn{
  width:100%;background:var(--black);color:var(--white);
  padding:16px;font-size:11px;letter-spacing:.1em;text-transform:uppercase;font-weight:700;
  margin-top:10px;
}
.place-order-btn:hover{background:#000;}
.err-msg{color:var(--danger);font-size:10.5px;margin:-8px 0 14px;display:none;}

/* order summary */
.summary-item{display:flex;gap:14px;padding:16px 0;border-top:1px solid var(--line);}
.summary-item:last-of-type{border-bottom:1px solid var(--line);}
.summary-item img{width:56px;height:56px;object-fit:contain;flex:none;}
.si-info{flex:1;}
.si-info .si-name{font-size:11.5px;letter-spacing:.04em;text-transform:uppercase;margin-bottom:6px;font-weight:700;}
.si-meta{font-size:10px;color:var(--gray);text-transform:uppercase;display:flex;justify-content:space-between;max-width:220px;}
.si-qtyctl{display:flex;align-items:center;gap:8px;}
.si-qtyctl button{font-size:12px;width:14px;}
.si-price{
  font-size:11.5px;align-self:flex-start;white-space:nowrap;
}

.tot-row{display:flex;justify-content:space-between;font-size:11px;padding:10px 0;letter-spacing:.05em;text-transform:uppercase;}
.tot-row.grand{font-weight:700;font-size:12.5px;border-top:1px solid var(--line);padding-top:14px;margin-top:4px;}
.promo{font-size:10px;color:var(--gray);text-decoration:underline;margin-top:10px;display:inline-block;}
.empty-cart-msg{padding:60px 0;text-align:center;color:var(--gray);font-size:11px;text-transform:uppercase;}

/* ================= CONFIRMATION ================= */
.confirm-view{
  max-width:420px;margin:60px auto;padding:0 22px;text-align:center;
}
.confirm-check{
  width:44px;height:44px;border:1px solid var(--black);border-radius:50%;
  display:flex;align-items:center;justify-content:center;margin:0 auto 22px;
}
.confirm-view h3{font-size:13px;letter-spacing:.06em;text-transform:uppercase;margin:0 0 12px;}
.confirm-view p{font-size:11px;color:var(--gray);margin:0 0 6px;}
.order-id{color:var(--black);font-weight:700;}
.confirm-actions{display:flex;flex-direction:column;gap:10px;margin-top:28px;}
.btn-block{
  padding:15px;font-size:11px;letter-spacing:.1em;text-transform:uppercase;font-weight:700;
  border:1px solid var(--black);
}
.btn-block.primary{background:var(--black);color:var(--white);}
.btn-block.ghost{background:var(--white);color:var(--black);}

/* ================= FOOTER ================= */
footer{border-top:1px solid var(--line);padding:26px 22px;text-align:center;}
.foot-links{display:flex;justify-content:center;gap:18px;flex-wrap:wrap;margin-bottom:10px;}
.foot-links a{font-size:9.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--gray);}
.foot-links a:hover{color:var(--black);}
.foot-note{font-size:9.5px;color:var(--gray-light);letter-spacing:.05em;}

/* ================= TOAST ================= */
.toast{
  position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(16px);
  background:var(--black);color:var(--white);
  padding:12px 20px;font-size:10.5px;letter-spacing:.08em;text-transform:uppercase;
  z-index:100;opacity:0;transition:all .3s;pointer-events:none;
}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0);}

/* ================= RESPONSIVE ================= */
@media(max-width:900px){
  .grid{grid-template-columns:repeat(3,1fr);}
  .checkout-wrap{grid-template-columns:1fr;gap:40px;}
}
@media(max-width:520px){
  .grid{grid-template-columns:repeat(2,1fr);row-gap:26px;}
  .cats{max-width:220px;top:60px;}
  .topbar{padding:16px 16px 6px;flex-wrap:wrap;}
  .grid-wrap{padding-top:56px;}
  .f-row{flex-direction:column;gap:0;}
  .pv-imgwrap{max-width:70vw;}
}