:root { 
    --color-primary: #2D5016; 
    --color-secondary: #8BC34A;
    --color-accent: #FF6B35;
    --color-dark: #1A2E22; 
    --color-light-bg: #F8F9FA; 
    --font-serif: 'Playfair Display', serif; 
    --font-sans: 'Inter', sans-serif; 
    --shadow-card: 0 8px 25px rgba(0,0,0,0.1);
    --shadow-hover: 0 15px 35px rgba(0,0,0,0.15);
    --border-radius: 16px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body { 
    margin: 0; 
    font-family: var(--font-sans); 
    background-color: var(--color-light-bg);
    line-height: 1.6;
    color: #333;
}

/* HEADER HERO MEJORADO */
.page-header { 
    padding: 5rem 2rem; 
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-dark) 100%);
    color: white; 
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"><g fill="none" fill-rule="evenodd"><g fill="%23ffffff" fill-opacity="0.06"><circle cx="30" cy="30" r="2"/></g></g></svg>');
    opacity: 0.4;
}

.page-header > * {
    position: relative;
    z-index: 2;
}

.page-header h1 { 
    font-family: var(--font-serif); 
    font-size: clamp(2.5rem, 6vw, 4rem); 
    color: var(--color-secondary);
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
    font-weight: 700;
}

.page-header p {
    font-size: 1.3rem;
    opacity: 0.95;
    max-width: 600px;
    margin: 0 auto;
    font-weight: 300;
}

/* CONTENEDOR PRINCIPAL MEJORADO */
.container-fluid {
    max-width: 1400px;
    margin: 0 auto;
    padding-left: 1.5rem;
    padding-right: 1.5rem;
}

.main-content-wrapper {
    padding: 2rem 0;
}

/* FILTROS SIDEBAR MEJORADOS */
.filters-sidebar { 
    position: sticky; 
    top: 2rem; 
    align-self: start;
    background: white;
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--shadow-card);
    border: 1px solid rgba(0,0,0,0.05);
}

.filter-block {
    margin-bottom: 2.5rem;
}

.filter-block h5 { 
    font-family: var(--font-serif); 
    color: var(--color-dark);
    font-size: 1.3rem;
    margin-bottom: 1.2rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.filter-block h5::before {
    content: '';
    width: 4px;
    height: 20px;
    background: var(--color-secondary);
    border-radius: 2px;
}

.filter-block .list-group {
    border: none;
}

.filter-block .list-group-item { 
    border: none;
    padding: 0.8rem 1.2rem;
    margin-bottom: 0.3rem;
    border-radius: 10px;
    transition: var(--transition);
    font-weight: 400;
    color: #666;
    background: transparent;
}

.filter-block .list-group-item:hover {
    background-color: rgba(139, 195, 74, 0.1);
    color: var(--color-primary);
    transform: translateX(5px);
}

.filter-block .list-group-item.active { 
    background-color: var(--color-secondary); 
    border-color: var(--color-secondary);
    color: white;
    font-weight: 500;
    transform: translateX(5px);
    box-shadow: 0 4px 12px rgba(139, 195, 74, 0.3);
}

/* BÚSQUEDA Y ORDENAMIENTO MEJORADOS */
.search-controls {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-card);
    margin-bottom: 2rem;
}

.input-group {
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
    border-radius: 50px;
    overflow: hidden;
    border: 2px solid transparent;
    transition: var(--transition);
}

.input-group:focus-within {
    border-color: var(--color-secondary);
    box-shadow: 0 4px 20px rgba(139, 195, 74, 0.2);
}

.form-control {
    border: none;
    padding: 1rem 1.5rem;
    font-size: 1rem;
    background: #f8f9fa;
}

.form-control:focus {
    box-shadow: none;
    background: white;
}

.input-group-append .btn {
    border: none;
    background: var(--color-primary);
    color: white;
    padding: 1rem 1.5rem;
    font-weight: 600;
    transition: var(--transition);
}

.input-group-append .btn:hover {
    background: var(--color-dark);
    transform: scale(1.02);
}

select.form-control {
    border-radius: 10px;
    border: 2px solid #e9ecef;
    transition: var(--transition);
    cursor: pointer;
}

select.form-control:focus {
    border-color: var(--color-secondary);
    box-shadow: 0 0 0 3px rgba(139, 195, 74, 0.1);
}

/* TARJETAS DE PRODUCTO MEJORADAS */
.product-card { 
    background: white; 
    border-radius: var(--border-radius); 
    overflow: hidden; 
    box-shadow: var(--shadow-card); 
    display: flex; 
    flex-direction: column; 
    transition: var(--transition);
    border: 1px solid rgba(0,0,0,0.05);
    height: 100%;
    margin-bottom: 0;
}

.product-card:hover { 
    transform: translateY(-10px) scale(1.02); 
    box-shadow: var(--shadow-hover);
}

.product-card-img { 
    width: 100%; 
    height: 250px; 
    object-fit: cover;
    transition: var(--transition);
}

.product-card:hover .product-card-img {
    transform: scale(1.05);
}

.card-body {
    padding: 1.8rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.card-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--color-dark);
    margin-bottom: 0.8rem;
    line-height: 1.3;
}

.card-title a {
    color: inherit;
    text-decoration: none;
    transition: color 0.3s ease;
}

.card-title a:hover {
    color: var(--color-primary);
}

.card-text {
    flex-grow: 1;
    margin-bottom: 1.5rem;
    color: #666;
    line-height: 1.5;
}

.product-card .price { 
    font-size: 1.6rem; 
    font-weight: 700; 
    color: var(--color-primary);
    margin-bottom: 1.2rem;
}

/* INFORMACIÓN DEL PRODUCTOR MEJORADA */
.producer-info { 
    display: flex;
    align-items: center;
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-radius: 12px;
    border: 1px solid rgba(0,0,0,0.05);
}

.producer-info img { 
    width: 45px; 
    height: 45px; 
    border-radius: 50%; 
    object-fit: cover;
    border: 2px solid var(--color-secondary);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.producer-info span {
    margin-left: 0.8rem;
    font-weight: 500;
    color: var(--color-dark);
}

.social-icons { 
    margin-left: auto;
    display: flex;
    gap: 0.5rem;
}

.social-icons svg { 
    width: 22px; 
    height: 22px; 
    fill: #999; 
    transition: var(--transition);
}

.social-icons a:hover svg { 
    fill: var(--color-primary);
    transform: scale(1.1);
}

/* ACCIONES DE PRODUCTO MEJORADAS */
.product-actions { 
    display: flex; 
    gap: 0.8rem; 
    justify-content: center;
    align-items: center;
}

.product-actions .btn { 
    border-radius: 25px; 
    font-weight: 600; 
    font-size: 0.9rem;
    padding: 0.75rem 1.5rem;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-success {
    background: #25D366;
    border-color: #25D366;
}

.btn-success:hover {
    background: #20B954;
    border-color: #20B954;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(37, 211, 102, 0.3);
}

.btn-outline-info {
    color: var(--color-accent);
    border-color: var(--color-accent);
}

.btn-outline-info:hover {
    background: var(--color-accent);
    border-color: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(255, 107, 53, 0.3);
}

/* GRID DE PRODUCTOS MEJORADO */
.row {
    margin-left: -1rem;
    margin-right: -1rem;
}

.row .col-12,
.row .col-md-6,
.row .col-xl-4 {
    padding-left: 1rem;
    padding-right: 1rem;
    margin-bottom: 2.5rem;
}

.products-grid-container .row {
    margin-left: -1.5rem;
    margin-right: -1.5rem;
}

.products-grid-container .col-12,
.products-grid-container .col-md-6,
.products-grid-container .col-xl-4 {
    padding-left: 1.5rem;
    padding-right: 1.5rem;
    margin-bottom: 3rem;
}

/* ESTADO VACÍO MEJORADO */
.alert-warning {
    background: white;
    border: none;
    border-radius: var(--border-radius);
    padding: 3rem;
    box-shadow: var(--shadow-card);
    border-left: 5px solid #ffc107;
}

.alert-warning::before {
    content: '🔍';
    font-size: 3rem;
    display: block;
    text-align: center;
    margin-bottom: 1rem;
}

/* ANIMACIONES SUAVES */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.product-card {
    animation: fadeInUp 0.6s ease forwards;
}

.product-card:nth-child(2) { animation-delay: 0.1s; }
.product-card:nth-child(3) { animation-delay: 0.2s; }
.product-card:nth-child(4) { animation-delay: 0.3s; }

/* RESPONSIVE MEJORADO */
@media (max-width: 768px) {
    .page-header {
        padding: 3rem 1rem;
    }
    
    .container-fluid {
        padding-left: 1rem;
        padding-right: 1rem;
    }
    
    .filters-sidebar {
        margin-bottom: 2rem;
    }
    
    .search-controls {
        margin: 1rem 0;
    }
    
    .row .col-12,
    .row .col-md-6,
    .row .col-xl-4 {
        padding-left: 0.75rem;
        padding-right: 0.75rem;
        margin-bottom: 2rem;
    }
    
    .product-actions {
        flex-direction: column;
    }
    
    .product-actions .btn {
        width: 100%;
        justify-content: center;
    }
}

@media (min-width: 769px) and (max-width: 1199px) {
    .row .col-12,
    .row .col-md-6,
    .row .col-xl-4 {
        margin-bottom: 2.5rem;
    }
}

@media (min-width: 1200px) {
    .row .col-12,
    .row .col-md-6,
    .row .col-xl-4 {
        margin-bottom: 3rem;
    }
    
    .container-fluid {
        padding-left: 2rem;
        padding-right: 2rem;
    }
}

/* MEJORAS DE ACCESIBILIDAD */
.filter-block .list-group-item:focus {
    outline: 2px solid var(--color-secondary);
    outline-offset: 2px;
}

.btn:focus {
    outline: 2px solid var(--color-secondary);
    outline-offset: 2px;
}

/* LOADING STATES */
.btn.loading {
    position: relative;
    color: transparent;
}

.btn.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 16px;
    height: 16px;
    border: 2px solid currentColor;
    border-radius: 50%;
    border-top-color: transparent;
    transform: translate(-50%, -50%);
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

.keyboard-navigation *:focus {
    outline: 3px solid var(--color-secondary);
    outline-offset: 2px;
}

.product-card-img {
    background: linear-gradient(135deg, #f0f0f0 0%, #e0e0e0 100%);
    opacity: 0.8;
    transition: opacity 0.3s ease;
}

.product-card-img.loaded {
    opacity: 1;
}