:root {
  --bg:#0f1724;
  --card:#0b1220;
  --accent:#38bdf8;
  --muted:#9ca3af;
  --glass: rgba(255,255,255,0.03);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:'Inter', sans-serif;
  background:#000;
  color:#e6eef6;
  line-height:1.4;
}

h1,h2,h3 { font-family:'Montserrat', sans-serif; }

header{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:20px 28px;
  background:linear-gradient(90deg, rgba(56,189,248,0.08), rgba(96,165,250,0.05));
  backdrop-filter: blur(6px);
  position:sticky;
  top:0;
  z-index:10;
}
.brand{display:flex;gap:12px;align-items:center}
.logo img {
  width:44px;
  height:44px;
  border-radius:10px;
  background:linear-gradient(135deg,var(--accent),#3b82f6);
  display:flex;
  align-items:center;
  justify-content:center;
  font-weight:700;
}
h1{font-size:18px;margin:0}
nav{display:flex;gap:10px;align-items:center}

a.btn, button.btn, .btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  text-decoration:none;
  background:var(--accent);
  border:none;
  color:#042028;
  padding:12px 18px;
  border-radius:12px;
  font-weight:700;
  cursor:pointer;
  transition:transform .2s ease, background .2s ease, box-shadow .2s ease;
}
.btn:hover{
  transform:scale(1.05);
  background:#67e8f9;
  box-shadow:0 10px 30px rgba(56,189,248,.25);
}
.btn.secondary{
  background:transparent;
  border:1px solid rgba(255,255,255,0.08);
  color:#dbeafe;
  font-weight:600;
}

/* Avant-page */
.landing{
  position:relative;
  isolation:isolate;
  min-height:84vh;
  display:grid;
  place-items:center;
  padding:56px 28px;
}
.landing::before{
  content:"";
  position:absolute;
  inset:0;
  background:url('images/bg.png') center/cover no-repeat;
  opacity:.64;
  z-index:-2;
}
.landing::after{
  content:"";
  position:absolute;
  inset:0;
  background:
    radial-gradient(1200px 600px at 10% 10%, rgba(56,189,248,.25), transparent),
    radial-gradient(1200px 600px at 90% 90%, rgba(59,130,246,.25), transparent);
  z-index:-1;
  animation: gradientMove 15s ease-in-out infinite alternate;
}
@keyframes gradientMove {
  from { background-position: 0% 0%; }
  to   { background-position: 100% 100%; }
}

.landing-wrap{
  max-width:1000px;
  display:grid;
  gap:22px;
  text-align:center;
}
.landing h2{
  font-size:clamp(28px,5vw,46px);
  margin:0;
  letter-spacing:.3px;
}
.landing p{
  color:#cbd5e1;
  margin:0 auto;
  max-width:800px;
}
.cta-row{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  justify-content:center;
  margin-top:12px;
}
.cta{
  padding:14px 18px;
  border-radius:14px;
}
.cta.ghost{
  background:transparent;
  border:1px solid rgba(255,255,255,0.12);
  color:#e6eef6;
}

main{
  padding:28px;
  max-width:1200px;
  margin:28px auto;
}
.hero{
  display:grid;
  grid-template-columns:1fr;
  gap:24px;
  align-items:start;
}

.search-card{
  background:rgba(15,23,36,0.7);
  backdrop-filter:blur(10px);
  border:1px solid rgba(255,255,255,0.1);
  padding:18px;
  border-radius:14px;
  box-shadow:0 6px 18px rgba(2,6,23,0.6);
}

.search-row{
  display:flex;
  gap:8px;
  margin-bottom:12px;
}

input, textarea{
  width:100%;
  padding:10px;
  border-radius:8px;
  border:none;
  background:var(--glass);
  color:inherit;
  transition: all 0.3s ease;
}
input:focus, textarea:focus {
  outline: none;
  border:1px solid var(--accent);
  box-shadow:0 0 10px rgba(56,189,248,0.5);
}

/* SELECT */
select {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  width: 100%;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.12);
  background-color: rgba(255,255,255,0.05);
  color: #e6eef6;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  padding-right: 32px;
}
select:hover {
  border-color: var(--accent);
  box-shadow: 0 0 10px rgba(56,189,248,0.4);
}
select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 15px rgba(56,189,248,0.6);
}
select option {
  background: #0f1724;
  color: #e6eef6;
}

.filters{
  display:flex;
  flex-direction:column;
  gap:8px;
}
.catalog{margin-top:18px}
.grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(250px,1fr));
  gap:18px;
}

.card{
  position:relative;
  background:rgba(15,23,36,0.7);
  backdrop-filter:blur(10px);
  border-radius:12px;
  padding:12px;
  overflow:hidden;
  border:1px solid rgba(255,255,255,0.1);
  opacity:0;
  transform:translateY(20px);
  transition:opacity .5s ease, transform .5s cubic-bezier(0.4, 0, 0.2, 1);
}
.card.visible{
  opacity:1;
  transform:translateY(0);
}
.card:hover{
  transform: translateY(-6px) scale(1.04);
  box-shadow:0 15px 30px rgba(56,189,248,0.3);
}
.card img{
  width:100%;
  height:160px;
  object-fit:cover;
  border-radius:8px;
  transition:transform .3s ease;
}
.card:hover img{transform:scale(1.08)}

.badge {
  position:absolute;
  top:10px;
  left:10px;
  background:var(--accent);
  color:#042028;
  padding:4px 8px;
  font-size:12px;
  border-radius:6px;
  font-weight:600;
}

.meta{
  display:flex;
  justify-content:space-between;
  align-items:center;
  margin-top:8px;
}
.price{
  font-weight:800;
  font-size:20px;
  background:linear-gradient(90deg,var(--accent),#3b82f6);
  -webkit-background-clip:text;
  -webkit-text-fill-color:transparent;
}
.tag{
  font-size:12px;
  padding:6px;
  border-radius:8px;
  background:rgba(255,255,255,0.03);
}

footer{
  padding:24px;
  text-align:center;
  color:var(--muted);
}

/* Double sliders */
.range-group{margin-bottom:20px}
.range-labels{
  display:flex;
  justify-content:space-between;
  font-size:14px;
  color:#cbd5e1;
  margin-bottom:6px;
}
.range-values{
  display:flex;
  justify-content:space-between;
  font-weight:700;
  color:var(--accent);
  margin-top:4px;
}
.double-range{
  position:relative;
  height:36px;
}
.double-range .track{
  position:absolute;
  top:50%;
  transform:translateY(-50%);
  height:6px;
  border-radius:6px;
  width:100%;
  background:rgba(255,255,255,0.1);
}
.range-fill{
  position:absolute;
  top:50%;
  transform:translateY(-50%);
  height:6px;
  border-radius:6px;
  background:linear-gradient(90deg,var(--accent),#3b82f6);
}

.double-range input[type=range] {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
  -webkit-appearance: none;
  width: calc(100% + 18px);
  left: -9px;
  background: transparent;
}
.double-range input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  pointer-events: auto;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid var(--accent);
  box-shadow: 0 0 8px var(--accent);
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
}
.double-range input[type=range]::-webkit-slider-thumb:hover {
  transform: scale(1.2);
  box-shadow: 0 0 15px var(--accent),0 0 25px rgba(56,189,248,0.5);
}

/* Modal Admin */
.modal{
  position:fixed;
  inset:0;
  background:rgba(2,6,23,.6);
  display:none;
  align-items:center;
  justify-content:center;
  padding:20px;
  z-index:50;
}
.modal.open{display:flex}
.modal-card{
  background:rgba(15,23,36,0.9);
  backdrop-filter:blur(12px);
  border:1px solid rgba(255,255,255,0.1);
  width:min(900px,96vw);
  border-radius:16px;
  padding:18px;
  box-shadow:0 20px 60px rgba(0,0,0,.5);
}
.modal-header{
  display:flex;
  justify-content:space-between;
  align-items:center;
  margin-bottom:10px;
}
.modal-header h3{margin:0}
.close-x{
  background:transparent;
  border:none;
  color:#cbd5e1;
  font-size:22px;
  cursor:pointer;
}
.admin-grid{
  display:grid;
  grid-template-columns:320px 1fr;
  gap:14px;
}
.admin-form input,
.admin-form select{
  margin-bottom:8px;
}
.admin-list{
  max-height:360px;
  overflow:auto;
  border:1px solid rgba(255,255,255,.06);
  border-radius:12px;
  padding:8px;
}
.row-admin{
  display:grid;
  grid-template-columns:1fr 90px 110px 90px 90px 120px;
  gap:8px;
  align-items:center;
  border-bottom:1px dashed rgba(255,255,255,.06);
  padding:8px 4px;
}
.row-admin:last-child{border-bottom:none}
.tiny{font-size:12px;color:#9ca3af}

/* Pagination */
#loadMoreBtn {
  margin:20px auto;
  display:block;
}

/* Spinner */
#loader{
  display:flex;
  justify-content:center;
  align-items:center;
  padding:40px;
}
.spinner{
  border:4px solid rgba(255,255,255,0.1);
  border-top:4px solid var(--accent);
  border-radius:50%;
  width:40px;
  height:40px;
  animation:spin 1s linear infinite;
}
@keyframes spin{
  0%{transform:rotate(0deg)}
  100%{transform:rotate(360deg)}
}