/**
 * CSS Principal - Livro Prático E-commerce
 * Design moderno, responsivo e acessível
 * 
 * @author Arquiteto de Software
 * @version 1.0
 */

/* Reset e Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Paleta Profissional - E-commerce */
    --primary-color: #1e3a8a;        /* Azul escuro profissional */
    --primary-dark: #1e40af;         /* Azul mais escuro */
    --primary-light: #3b82f6;        /* Azul médio */
    --secondary-color: #6b7280;      /* Cinza neutro */
    --secondary-dark: #4b5563;       /* Cinza escuro */
    
    /* Cores Neutras Sofisticadas */
    --white: #ffffff;
    --cream: #fefdfb;                /* Bege muito suave */
    --gray-50: #f8fafc;             /* Cinza muito claro */
    --gray-100: #f1f5f9;            /* Cinza claro */
    --gray-200: #e2e8f0;            /* Cinza claro médio */
    --gray-300: #cbd5e1;            /* Cinza médio */
    --gray-400: #94a3b8;            /* Cinza médio escuro */
    --gray-500: #64748b;            /* Cinza escuro */
    --gray-600: #475569;            /* Cinza muito escuro */
    --gray-700: #334155;            /* Cinza quase preto */
    --gray-800: #1e293b;            /* Cinza escuro */
    --gray-900: #0f172a;            /* Quase preto */
    
    /* Cores de Status Profissionais */
    --success-color: #16a34a;        /* Verde corporativo */
    --warning-color: #ea580c;        /* Laranja corporativo */
    --error-color: #dc2626;          /* Vermelho corporativo */
    --info-color: #0ea5e9;           /* Azul informativo */
    
    /* Tipografia Profissional */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    --font-family-heading: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    
    /* Espaçamentos */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-5: 1.25rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-10: 2.5rem;
    --spacing-12: 3rem;
    --spacing-16: 4rem;
         --primary-color: #2563EB;        /* Azul vibrante */
    /* Bordas */
    --border-radius-sm: 0.25rem;
    --border-radius: 0.375rem;
    --border-radius-md: 0.5rem;
    --border-radius-lg: 0.75rem;
    --border-radius-xl: 1rem;
    
    /* Sombras */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
         background-color: #FFFFFF;
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Transições */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;
    
    /* Layout */
    --container-max-width: 1200px;
    --header-height: 80px;
}

/* Base Styles */
html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--gray-800);
    background-color: var(--cream);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
}

/* Container */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-4);
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--spacing-6);
    }
}

/* Header Profissional */
.header {
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 100;
    height: var(--header-height);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    gap: var(--spacing-4);
}

.logo h1 {
    font-family: var(--font-family-heading);
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    letter-spacing: -0.025em;
}

.logo-icon {
    font-size: var(--font-size-2xl);
    opacity: 0.95;
    filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.1));
    transition: all var(--transition-fast);
}

.logo-icon:hover {
    opacity: 1;
    transform: scale(1.02);
}

.tagline {
    font-size: var(--font-size-sm);
    color: var(--gray-600);
    margin-top: var(--spacing-1);
    font-weight: 400;
    letter-spacing: 0.025em;
}

/* Navigation Profissional */
.nav-list {
    display: flex;
    list-style: none;
    gap: var(--spacing-6);
}

.nav-link {
    text-decoration: none;
    color: var(--gray-700);
    font-weight: 500;
    padding: var(--spacing-2) var(--spacing-4);
    border-radius: var(--border-radius-md);
    transition: all var(--transition-fast);
    font-size: var(--font-size-sm);
    letter-spacing: 0.025em;
}

.nav-link:hover {
    color: var(--primary-color);
    background-color: var(--gray-50);
}

.nav-link.active {
    color: var(--primary-color);
    background-color: rgba(30, 58, 138, 0.08);
    font-weight: 600;
}

/* Header Actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
}

.cart-btn {
    position: relative;
    background: var(--primary-color);
    color: var(--white);
    border: none;
    padding: var(--spacing-3) var(--spacing-4);
    border-radius: var(--border-radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    font-weight: 500;
    transition: all var(--transition-fast);
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
}

.cart-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.cart-icon {
    width: 20px;
    height: 20px;
    stroke-width: 1.75;
    filter: drop-shadow(0 1px 1px rgba(0, 0, 0, 0.1));
}

.cart-count {
    background: var(--secondary-color);
    color: var(--white);
    font-size: var(--font-size-xs);
    font-weight: 700;
    padding: var(--spacing-1) var(--spacing-2);
    border-radius: 50%;
    min-width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: absolute;
    top: -5px;
    right: -5px;
}

/* Hero Section Profissional */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--white);
    padding: var(--spacing-12) 0;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('../images/hero-books-bg.svg') center/cover no-repeat;
    opacity: 0.1;
    z-index: 1;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-10);
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

.hero-text {
    text-align: left;
}

.hero-title {
    font-family: var(--font-family-heading);
    font-size: var(--font-size-4xl);
    font-weight: 600;
    margin-bottom: var(--spacing-4);
    line-height: 1.1;
    letter-spacing: -0.025em;
}

.highlight {
    color: var(--cream);
    display: block;
    margin-top: var(--spacing-2);
    font-weight: 400;
}

.hero-description {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-8);
    opacity: 0.95;
    line-height: 1.6;
    font-weight: 400;
}

.hero-features {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-5);
}

.feature {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    font-weight: 500;
    font-size: var(--font-size-lg);
}

.feature-icon {
    width: 24px;
    height: 24px;
    stroke-width: 1.5;
    opacity: 0.85;
    flex-shrink: 0;
    filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.08));
    transition: all var(--transition-fast);
}

.feature-icon:hover {
    opacity: 1;
    transform: translateY(-1px);
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-img {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
}

/* Responsividade para Hero */
@media (max-width: 768px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-text {
        text-align: center;
        order: 2;
    }
    
    .hero-image {
        order: 1;
        margin-bottom: var(--spacing-4);
    }
    
    .hero-features {
        flex-direction: row;
        justify-content: center;
        flex-wrap: wrap;
        gap: var(--spacing-6);
    }
}

/* Main Content */
.main {
    flex: 1;
    padding: var(--spacing-12) 0;
}

/* Filtros Profissionais */
.filters {
    background: var(--white);
    padding: var(--spacing-8);
    border-radius: var(--border-radius-xl);
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    border: 1px solid var(--gray-100);
    margin-bottom: var(--spacing-10);
}

.filters-header h3 {
    font-family: var(--font-family-heading);
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--spacing-6);
    letter-spacing: -0.025em;
}

.filters-controls {
    display: flex;
    gap: var(--spacing-4);
    flex-wrap: wrap;
    align-items: center;
}

.search-box {
    display: flex;
    flex: 1;
    min-width: 280px;
    max-width: 420px;
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    border-radius: var(--border-radius-md);
    overflow: hidden;
}

.search-input {
    flex: 1;
    padding: var(--spacing-3) var(--spacing-4);
    border: 1px solid var(--gray-300);
    border-right: none;
    border-radius: var(--border-radius-md) 0 0 var(--border-radius-md);
    font-size: var(--font-size-base);
    transition: all var(--transition-fast);
    background: var(--white);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.1);
}

.search-input::placeholder {
    color: var(--gray-500);
}

.search-btn {
    background: var(--primary-color);
    color: var(--white);
    border: 1px solid var(--primary-color);
    padding: var(--spacing-3) var(--spacing-4);
    border-radius: 0 var(--border-radius-md) var(--border-radius-md) 0;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.search-btn:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-1px);
}

.search-icon {
    width: 18px;
    height: 18px;
    stroke-width: 1.75;
    filter: drop-shadow(0 1px 1px rgba(0, 0, 0, 0.1));
}

.filter-group {
    display: flex;
    gap: var(--spacing-3);
    flex-wrap: wrap;
}

.filter-select,
.sort-select {
    padding: var(--spacing-3) var(--spacing-4);
    border: 1px solid var(--gray-300);
    border-radius: var(--border-radius-md);
    font-size: var(--font-size-base);
    background: var(--white);
    cursor: pointer;
    transition: all var(--transition-fast);
    min-width: 160px;
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
}

.filter-select:focus,
.sort-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.1);
}

.filter-select:hover,
.sort-select:hover {
    border-color: var(--gray-400);
}

.clear-filters-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-4);
    background: var(--gray-50);
    color: var(--gray-700);
    border: 1px solid var(--gray-300);
    border-radius: var(--border-radius-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
}

.clear-filters-btn:hover {
    background: var(--gray-100);
    border-color: var(--gray-400);
    color: var(--gray-800);
    transform: translateY(-1px);
    box-shadow: 0 2px 4px 0 rgba(0, 0, 0, 0.1);
}

.clear-filters-btn:active {
    transform: translateY(0);
}

.clear-icon {
    width: 16px;
    height: 16px;
    stroke-width: 1.75;
    opacity: 0.8;
    transition: all var(--transition-fast);
}

.clear-filters-btn:hover .clear-icon {
    opacity: 1;
    transform: rotate(90deg);
}

/* Loading State */
.loading {
    text-align: center;
    padding: var(--spacing-16);
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--gray-200);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-4);
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Error State */
.error-message {
    text-align: center;
    padding: var(--spacing-16);
}

.error-content {
    background: var(--white);
    padding: var(--spacing-8);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    max-width: 400px;
    margin: 0 auto;
}

.error-icon {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--spacing-4);
    opacity: 0.8;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.error-content h4 {
    color: var(--error-color);
    margin-bottom: var(--spacing-2);
}

.retry-btn {
    background: var(--primary-color);
    color: var(--white);
    border: none;
    padding: var(--spacing-3) var(--spacing-6);
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 500;
    margin-top: var(--spacing-4);
    transition: background-color var(--transition-fast);
}

.retry-btn:hover {
    background: var(--primary-dark);
}

/* Kits Section */
.kits-section {
    margin-bottom: var(--spacing-12);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-8);
}

.section-header h3 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: var(--spacing-2);
}

.section-description {
    font-size: var(--font-size-lg);
    color: var(--gray-600);
    max-width: 600px;
    margin: 0 auto;
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-4);
    margin-top: var(--spacing-8);
}

.pagination-btn {
    background: var(--white);
    color: var(--gray-600);
    border: 2px solid var(--gray-200);
    padding: var(--spacing-2) var(--spacing-4);
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.pagination-btn:hover:not(:disabled) {
    background: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
}

.pagination-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.pagination-info {
    font-weight: 500;
    color: var(--gray-600);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-6);
    border: none;
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-sm);
}

.btn-primary {
    background: var(--primary-color);
    color: var(--white);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--gray-200);
    color: var(--gray-700);
}

.btn-secondary:hover {
    background: var(--gray-300);
}

.btn-success {
    background: var(--success-color);
    color: var(--white);
}

.btn-warning {
    background: var(--warning-color);
    color: var(--white);
}

.btn-danger {
    background: var(--error-color);
    color: var(--white);
}

/* Footer Moderno e Profissional */
.footer-modern {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    color: #e2e8f0;
    position: relative;
    margin-top: auto;
    overflow: hidden;
}

.footer-wave {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    overflow: hidden;
    line-height: 0;
    transform: rotate(180deg);
}

.footer-wave svg {
    position: relative;
    display: block;
    width: calc(100% + 1.3px);
    height: 60px;
}

.footer-wave .shape-fill {
    fill: #ffffff;
}

.footer-main {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 4rem;
    padding: 4rem 0 2rem;
    position: relative;
    z-index: 2;
}

.footer-brand {
    max-width: 400px;
}

.footer-logo h3 {
    font-size: 2rem;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 0.5rem;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    letter-spacing: -0.02em;
}

.footer-tagline {
    font-size: 1rem;
    color: #94a3b8;
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.footer-description {
    font-size: 0.95rem;
    line-height: 1.7;
    color: #cbd5e1;
    margin-bottom: 2rem;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-link {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid rgba(255, 255, 255, 0.1);
    
    color: #e2e8f0;
}

.social-link:hover {
    background: rgba(59, 130, 246, 0.8);
    border-color: rgba(59, 130, 246, 0.5);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(59, 130, 246, 0.3);
    color: #ffffff;
}

.footer-links-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.footer-column h4 {
    font-size: 1.1rem;
    font-weight: 600;
    color: #ffffff;
    margin-bottom: 1.5rem;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    letter-spacing: -0.01em;
}

.footer-column ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-column li {
    margin-bottom: 0.75rem;
}

.footer-column a {
    color: #cbd5e1;
    text-decoration: none;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.footer-column a:hover {
    color: #ffffff;
    transform: translateX(4px);
}

.security-badges {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.badge {
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.3);
    padding: 0.75rem 1rem;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 500;
    text-align: center;
    color: #86efac;
    transition: all 0.3s ease;
    
}

.badge:hover {
    background: rgba(34, 197, 94, 0.2);
    border-color: rgba(34, 197, 94, 0.5);
    transform: scale(1.02);
}

/* Estilos para o selo SSL */
.ssl-certificate {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 0.5rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    transition: all 0.3s ease;
    

@supports ((-webkit-backdrop-filter: blur(10px)) or (backdrop-filter: blur(10px))) {
    .social-link { -webkit-backdrop-filter: blur(10px); }
    .badge { -webkit-backdrop-filter: blur(5px); }
    .ssl-certificate { -webkit-backdrop-filter: blur(10px); }
}

@supports not ((-webkit-backdrop-filter: blur(10px)) or (backdrop-filter: blur(10px))) {
    .social-link { background: rgba(255, 255, 255, 0.08); box-shadow: inset 0 0 0 1px rgba(255,255,255,0.08); }
    .badge { background: rgba(34, 197, 94, 0.12); box-shadow: inset 0 0 0 1px rgba(34,197,94,0.3); }
    .ssl-certificate { background: rgba(255, 255, 255, 0.08); box-shadow: inset 0 0 0 1px rgba(255,255,255,0.1); }
}

.ssl-certificate:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
    transform: scale(1.02);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.ssl-seal {
    max-width: 100%;
    height: auto;
    max-height: 40px;
    filter: brightness(1.1) contrast(1.1);
    transition: all 0.3s ease;
}

.ssl-certificate:hover .ssl-seal {
    filter: brightness(1.2) contrast(1.2);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 2rem 0;
    position: relative;
    z-index: 2;
}

.footer-bottom-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-bottom p {
    color: #94a3b8;
    font-size: 0.9rem;
    margin: 0;
}

.footer-dev {
    color: #64748b;
    font-size: 0.85rem;
    font-style: italic;
}

/* Responsividade Aprimorada */
@media (max-width: 1024px) {
    .footer-main {
        grid-template-columns: 1fr;
        gap: 3rem;
        padding: 3rem 0 2rem;
    }
    
    .footer-links-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
    }
}

@media (max-width: 768px) {
    .footer-wave svg {
        height: 40px;
    }
    
    .footer-main {
        gap: 2rem;
        padding: 2.5rem 0 1.5rem;
    }
    
    .footer-links-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .footer-logo h3 {
        font-size: 1.75rem;
    }
    
    .social-links {
        justify-content: center;
    }
    
    .footer-bottom-content {
        flex-direction: column;
        text-align: center;
        gap: 0.5rem;
    }
}

@media (max-width: 480px) {
    .footer-main {
        padding: 2rem 0 1rem;
    }
    
    .footer-brand {
        text-align: center;
    }
    
    .social-link {
        width: 44px;
        height: 44px;
    }
    
    .security-badges {
        align-items: center;
    }
    
    .badge {
        max-width: 200px;
    }
}

/* Design Responsivo Aprimorado */

/* Tablets e dispositivos médios */
@media (max-width: 1024px) {
    .container {
        padding: 0 var(--spacing-4);
    }
    
    .hero {
        padding: var(--spacing-8) 0;
    }
    
    .filters {
        padding: var(--spacing-6);
    }
}

/* Tablets pequenos */
@media (max-width: 768px) {
    .header-content {
        flex-wrap: wrap;
        gap: var(--spacing-3);
        padding: var(--spacing-4) 0;
    }
    
    .nav {
        order: 3;
        width: 100%;
        margin-top: var(--spacing-2);
    }
    
    .nav-list {
        justify-content: center;
        gap: var(--spacing-4);
        flex-wrap: wrap;
    }
    
    .hero {
        padding: var(--spacing-6) 0;
        text-align: center;
    }
    
    .hero-title {
        font-size: var(--font-size-3xl);
        line-height: 1.2;
    }
    
    .hero-features {
        gap: var(--spacing-4);
        justify-content: center;
    }
    
    .filters {
        padding: var(--spacing-5);
    }
    
    .filters-controls {
        flex-direction: column;
        align-items: stretch;
        gap: var(--spacing-4);
    }
    
    .search-box {
        min-width: auto;
        max-width: none;
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-6);
    }
    
    /* Responsividade do selo SSL para tablets */
    .ssl-seal {
        max-height: 35px;
    }
}

/* Smartphones */
@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-3);
    }
    
    .header-content {
        padding: var(--spacing-3) 0;
    }
    
    .logo h1 {
        font-size: var(--font-size-lg);
    }
    
    .nav-list {
        gap: var(--spacing-2);
    }
    
    .nav-link {
        padding: var(--spacing-2);
        font-size: var(--font-size-xs);
    }
    
    .hero {
        padding: var(--spacing-4) 0;
    }
    
    .hero-title {
        font-size: var(--font-size-2xl);
        margin-bottom: var(--spacing-3);
    }
    
    .hero-description {
        font-size: var(--font-size-base);
        margin-bottom: var(--spacing-4);
    }
    
    .hero-features {
        flex-direction: column;
        gap: var(--spacing-3);
    }
    
    .filters {
        padding: var(--spacing-4);
        margin-bottom: var(--spacing-4);
    }
    
    .filter-group {
        flex-direction: column;
        gap: var(--spacing-3);
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-4);
        text-align: center;
    }
    
    /* Responsividade do selo SSL para smartphones */
    .ssl-certificate {
        padding: 0.4rem;
    }
    
    .ssl-seal {
        max-height: 30px;
    }
    
    .security-badges {
        gap: 0.5rem;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles */
*:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

button:focus,
input:focus,
select:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Print styles */
@media print {
    .header,
    .footer,
    .filters,
    .pagination {
        display: none;
    }
    
    body {
        background: white;
        color: black;
    }
}

/* ===== PLACEHOLDER COLORS GLOBAIS - CONSISTÊNCIA ===== */

/* Cores padrão para todos os placeholders */
input::placeholder,
textarea::placeholder,
select::placeholder {
    color: #94a3b8 !important;
    opacity: 1 !important;
    font-weight: 400;
    transition: color 0.2s ease;
}

/* Placeholders em campos readonly */
input[readonly]::placeholder,
textarea[readonly]::placeholder {
    color: #94a3b8 !important;
    opacity: 0.8 !important;
    font-style: italic;
}

/* Placeholders em foco */
input:focus::placeholder,
textarea:focus::placeholder {
    color: #64748b !important;
    opacity: 0.7 !important;
}

/* Compatibilidade com navegadores */
input::-webkit-input-placeholder,
textarea::-webkit-input-placeholder {
    color: #94a3b8 !important;
    opacity: 1 !important;
}

input::-moz-placeholder,
textarea::-moz-placeholder {
    color: #94a3b8 !important;
    opacity: 1 !important;
}

input::placeholder,
textarea::placeholder {
    color: #94a3b8 !important;
    opacity: 1 !important;
}

/* Fallbacks para navegadores que não suportam backdrop-filter
   - Quando backdrop-filter não é suportado, aplicar cor de fundo semi-transparente
     para manter legibilidade e estética. Usamos @supports para detectar suporte. */
@supports not ((-webkit-backdrop-filter: blur(1px)) or (backdrop-filter: blur(1px))) {
    .social-link, .badge, .ssl-certificate {
        /* Fallback visual seguro */
        background-color: rgba(255,255,255,0.06) !important;
        border-color: rgba(255,255,255,0.08) !important;
    }

    /* Ajustes para badges com fundo escuro */
    .badge {
        background-color: rgba(34,197,94,0.08) !important;
        border-color: rgba(34,197,94,0.25) !important;
        color: #d1fae5 !important;
    }
}