:root{
    --bg:#f6f7fb;
    --card:#ffffff;
    --accent:#2b7a78;
    --muted:#6b7280;
    --danger:#d9534f;
    --radius:10px;
    --max-width:1200px;
    --gap:18px;
    --shadow: 0 6px 18px rgba(20,20,40,0.06);
}

/* Global */
*{box-sizing:border-box}
html,body{height:100%}
body{
    margin:0;
    font-family:Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
    background:linear-gradient(180deg, var(--bg), #eef2f7 120%);
    color:#111827;
    -webkit-font-smoothing:antialiased;
}

.container{
    width:90%;
    max-width:var(--max-width);
    margin:28px auto;
    padding:18px;
}

/* Layout */
.layout-productos{
    display:grid;
    grid-template-columns:280px 1fr;
    gap:var(--gap);
    align-items:start;
}

.sidebar{
    background:var(--card);
    padding:16px;
    border-radius:var(--radius);
    box-shadow:var(--shadow);
    position:sticky;
    top:20px;
    height:fit-content;
}

.main-productos{
    background:transparent;
    padding:8px 4px;
}

h2{margin:6px 0 18px 4px;font-weight:600;color:var(--accent)}

/* Search form */
.form-buscador{display:flex;flex-direction:column;gap:10px}
.form-buscador input[type="text"],
.form-buscador input[type="number"],
.form-buscador select{
    width:100%;
    padding:10px 12px;
    border-radius:8px;
    border:1px solid #e6e9ef;
    background:#fff;
    outline:none;
}
.form-buscador button{padding:10px 12px;border-radius:8px;border:none;background:var(--accent);color:#fff;cursor:pointer}
.form-buscador button:hover{opacity:0.95}

/* Product grid */
.contenedor-productos{
    display:grid;
    grid-template-columns:repeat(auto-fill,minmax(220px,1fr));
    gap:18px;
}

.tarjeta-producto{
    background:var(--card);
    border-radius:12px;
    overflow:hidden;
    box-shadow:var(--shadow);
    display:flex;
    flex-direction:column;
    transition:transform .18s ease, box-shadow .18s ease;
}
.tarjeta-producto:hover{transform:translateY(-6px);box-shadow:0 12px 30px rgba(20,20,40,0.08)}

.img-producto{
    width:100%;
    height:170px;
    object-fit:cover;
    display:block;
    background:#f3f4f6;
}

.info-producto{padding:12px 14px;display:flex;flex-direction:column;gap:8px;flex:1}
.info-producto h3{margin:0;font-size:1rem}
.info-producto h3 a{color:#111827;text-decoration:none}
.info-producto p{margin:0;color:var(--muted);font-size:.93rem}

.precio{font-weight:700;color:var(--accent);font-size:1.06rem}
.stock{font-size:.9rem;color:var(--muted)}

.btn{display:inline-block;background:var(--accent);color:#fff;border:none;padding:8px 10px;border-radius:8px;cursor:pointer}
.btn:hover{opacity:.95}

.admin-link{color:#6b7280;text-decoration:none;font-size:.92rem}

.form-agregar-carrito{display:flex;gap:8px;align-items:center;margin-top:8px}
.form-agregar-carrito input[type="number"]{width:72px;padding:8px;border-radius:8px;border:1px solid #e6e9ef}

.mensaje-error{color:var(--danger);font-weight:600}
.mensaje-vacio{padding:18px;background:#fff;border-radius:10px;box-shadow:var(--shadow)}

/* Pagination */
.paginacion{display:flex;gap:12px;align-items:center;margin-top:18px}
.paginacion a{padding:8px 12px;border-radius:8px;background:#fff;border:1px solid #e6e9ef;text-decoration:none;color:var(--accent)}

/* Small screens */
@media (max-width:900px){
    .layout-productos{grid-template-columns:1fr}
    .sidebar{position:relative;top:auto;margin-bottom:12px}
    .img-producto{height:160px}
}

@media (max-width:520px){
    .contenedor-productos{grid-template-columns:repeat(1,1fr)}
    .img-producto{height:220px}
    .form-buscador{gap:8px}
}

/* Small utilities */
.muted{color:var(--muted)}
.text-right{text-align:right}

/* Accessibility focus states */
a:focus, button:focus, input:focus, select:focus{outline:3px solid rgba(43,122,120,0.14);outline-offset:2px}

/* Footer spacing (if included in other fragments) */
footer{margin-top:28px;padding:14px;text-align:center;color:var(--muted)}