:root {
    --bg:#f6f8fb;
    --card:#ffffff;
    --text:#1f2937;
    --muted:#6b7280;
    --accent:#1976d2;
    --transparent: #ffffff00;
    --radius:12px;
}

* { box-sizing:border-box }

body {
    font-family: "Roboto", sans-serif;
    background-color: var(--bg);
    color: var(--text);
    margin: 0;
    -webkit-font-smoothing:antialiased;
}

.container {
    max-width:1200px;
    margin:0 auto;
    padding:2rem 1rem;
}

header { background:transparent }
.site-header {
    display:flex;
    align-items:center;
    justify-content:space-between;
    padding:1rem 0;
}
.brand {
    font-size:1.25rem;
    font-weight:700;
    color:var(--accent);
}

.brand, .menu { margin: 0 1em }

.menu {
    display:flex;
    gap:0.75rem;
}
.menu_tab {
    color:var(--text);
    padding:8px 12px;
    text-decoration:none;
    border-radius:8px;
    font-weight:600;
}
.menu_tab.select {
    background:var(--accent);
    color:#fff;
}
.menu_tab:hover:not(.select) { background:rgba(25,118,210,0.08); }

.hero {
    background:linear-gradient(90deg, rgba(25,118,210,0.06), transparent);
    padding:2rem 0;
}
.hero-inner {
    max-width:900px;
    margin:0 auto;
    padding:1rem;
    text-align:center
}
.hero h1 {
    margin:0;
    font-size:1.8rem
}
.hero p {
    margin:0.5rem 0;
    color:var(--muted)
}

main {
    display: block;
    height: 100vh;
}

.layout {
    display:grid;
    grid-template-columns: 1fr 300px;
    gap:1.25rem;
    align-items:start;
}

aside {
    background:var(--card);
    padding:1rem;
    border-radius:var(--radius);
    box-shadow:0 6px 18px rgba(15,23,42,0.06)
}

.filter label {
    display:block;
    margin-bottom:0.35rem;
    color:var(--muted)
}
.filter input[type=number] {
    width:60%;
    padding:0.5rem;
    border-radius:8px;
    border:1px solid #e6e9ef;
    margin: 2px auto;
}
.filter .actions {
    display:flex;
    gap:0.5rem;
    margin-top:1rem
}
.filter .actions button {
    color: var(--card);
    background: var(--accent);
    /* color: var(--text);
    background: var(--card); */
    border-radius: 8px;
    border: 0;
    padding: 4px 8px;
    box-shadow: inset -2px -2px 1px #11579c;
}

.filter .actions button:hover { background: #2b87e4; }
.filter .actions button:active { box-shadow: inset 2px 2px 1px #11579c; }

.grid_products {
    display:grid;
    grid-template-columns:repeat(auto-fill,minmax(220px,1fr));
    gap:1rem
}

.product {
    position: relative;
    background: var(--card);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: 0 6px 18px rgba(15,23,42,0.06);
    transition: transform .18s ease, box-shadow .18s ease
}
.product:hover {
    transform:translateY(-6px);
    box-shadow:0 12px 30px rgba(15,23,42,0.09)
}
.product img {
    width: 100%;
    height: 160px;
    position: relative;
    object-fit: cover;
}
.product .name {
    font-weight:700;
    padding:0.6rem 0;
    text-align:center
}
.product .description {
    text-align:center;
    color:var(--muted);
    padding-bottom:0.6rem
}
.product.hidden { display:none }
.product .btn-moving {
    background: var(--card);
    height: 30px;
    width: 30px;
    border: 0;
    border-radius: 2em;
    opacity: 0;
    position: absolute;
    transform: translate(5px, -100px);
    pointer-events: auto;
    /* display: none */
}
.product .btn-moving:hover { opacity: 0.7 }
.product .btn-moving-next {
    position: absolute;
    transform: translate(235px, -100px);
}
.product .lb-moving {
    color: var(--card);
    position: absolute;
    transform: translate(235px, -25px);
}

.pagination { 
    display:flex;
    justify-content:flex-end;
    align-items:center;
    gap:0.4rem;
    padding:0.5rem 0
}
.pagination a { 
    padding:6px 10px;
    border-radius:6px;
    text-decoration:none;
    color:var(--text);
    background:transparent
}
.pagination a.select {
    background:var(--accent);
    color:#fff
}

footer {
    color: var(--muted);
    font-size: 0.9rem;
    text-align: center;
    padding: 1rem 0;
}

.information {
    text-align: center;
    position: relative;
    top: 10em;
}

@media (max-width:900px) {
    .layout{grid-template-columns:1fr}
    aside{order:2}
    .hero h1{font-size:1.4rem}
}