/* -------------------------- */
/* 1. VARIÁVEIS E RESET - MOBILE FIRST */
/* -------------------------- */
:root {
    /* Cores Primárias */
    --color-primary: #1565C0;
    --color-primary-light: #5e92f3;
    --color-primary-dark: #003c8f;
    
    /* Cores Secundárias */
    --color-secondary: #2E7D32;
    --color-secondary-light: #60ad5e;
    --color-secondary-dark: #005005;
    
    /* Cores de Acento */
    --color-accent: #FF9800;
    --color-accent-light: #ffc947;
    --color-accent-dark: #c66900;
    
    /* Cores Neutras */
    --color-dark: #212121;
    --color-dark-medium: #424242;
    --color-light: #f5f5f5;
    --color-white: #ffffff;
    --color-background: #fafafa;
    
    /* Cores de Superfície */
    --color-surface: #ffffff;
    --color-surface-variant: #f8f9fa;
    
    /* Cores de Texto */
    --color-text-primary: #212121;
    --color-text-secondary: #757575;
    --color-text-disabled: #9e9e9e;
    
    /* Cores de Borda */
    --color-border-light: #e0e0e0;
    --color-border-medium: #bdbdbd;
    
    /* Cores de Estado */
    --color-error: #d32f2f;
    --color-success: #388e3c;
    --color-warning: #f57c00;
    --color-info: #1976d2;
    
    /* Gradientes */
    --gradient-primary: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    --gradient-accent: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
    
    /* Tipografia */
    --font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-display: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-body: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    
    /* Layout */
    --container-padding: 1rem;
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 12px;
    
    /* Espaçamentos */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-xxl: 3rem;
    
    /* Tipografia Mobile First */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-md: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-xxl: 1.5rem;
    
    /* Sombras */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
    --shadow-md: 0 3px 6px rgba(0,0,0,0.15), 0 2px 4px rgba(0,0,0,0.12);
    --shadow-lg: 0 10px 20px rgba(0,0,0,0.15), 0 3px 6px rgba(0,0,0,0.10);
    --shadow-xl: 0 15px 25px rgba(0,0,0,0.15), 0 5px 10px rgba(0,0,0,0.05);
    
    /* Transições */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Dark Mode Colors */
[data-theme="dark"] {
    /* Cores Primárias */
    --color-primary: #90caf9;
    --color-primary-light: #c3fdff;
    --color-primary-dark: #5d99c6;
    
    /* Cores Secundárias */
    --color-secondary: #81c784;
    --color-secondary-light: #b2fab4;
    --color-secondary-dark: #519657;
    
    /* Cores de Acento */
    --color-accent: #ffb74d;
    --color-accent-light: #ffe97d;
    --color-accent-dark: #c88719;
    
    /* Cores Neutras */
    --color-dark: #e0e0e0;
    --color-dark-medium: #b0b0b0;
    --color-light: #2d2d2d;
    --color-white: #121212;
    --color-background: #1a1a1a;
    
    /* Cores de Superfície */
    --color-surface: #1e1e1e;
    --color-surface-variant: #2d2d2d;
    
    /* Cores de Texto */
    --color-text-primary: #e0e0e0;
    --color-text-secondary: #a0a0a0;
    --color-text-disabled: #666666;
    
    /* Cores de Borda */
    --color-border-light: #404040;
    --color-border-medium: #555555;
    
    /* Cores de Estado */
    --color-error: #f44336;
    --color-success: #4caf50;
    --color-warning: #ff9800;
    --color-info: #2196f3;
    
    /* Gradientes */
    --gradient-primary: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    --gradient-accent: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
}

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

html {
    scroll-behavior: smooth;
    font-size: 14px; /* Base menor para mobile */
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-background);
    overflow-x: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}

a {
    text-decoration: none;
    color: var(--color-primary);
    transition: all var(--transition-fast);
}

button {
    font-family: inherit;
    cursor: pointer;
}

/* -------------------------- */
/* 2. LAYOUT MOBILE FIRST */
/* -------------------------- */
.container {
    width: 100%;
    max-width: 100%;
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* -------------------------- */
/* 3. TIPOGRAFIA MOBILE */
/* -------------------------- */
h1, h2, h3, h4, h5, h6 {
    margin-bottom: var(--space-md);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-text-primary);
}

h1 { font-size: 1.75rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.125rem; }
h5 { font-size: 1rem; }
h6 { font-size: 0.875rem; }

p {
    margin-bottom: var(--space-md);
    color: var(--color-text-primary);
}

/* -------------------------- */
/* 4. UTILITY CLASSES */
/* -------------------------- */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-sm); }
.mb-2 { margin-bottom: var(--space-md); }
.mb-3 { margin-bottom: var(--space-lg); }
.mb-4 { margin-bottom: var(--space-xl); }
.mb-5 { margin-bottom: var(--space-xxl); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--space-sm); }
.mt-2 { margin-top: var(--space-md); }
.mt-3 { margin-top: var(--space-lg); }
.mt-4 { margin-top: var(--space-xl); }

.p-1 { padding: var(--space-sm); }
.p-2 { padding: var(--space-md); }
.p-3 { padding: var(--space-lg); }
.p-4 { padding: var(--space-xl); }

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--color-primary);
    color: white;
    padding: 8px 12px;
    z-index: 10000;
    text-decoration: none;
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    transition: top var(--transition-normal);
}

.skip-link:focus {
    top: 6px;
}

/* -------------------------- */
/* 5. BOTÕES MELHORADOS */
/* -------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    text-align: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    border: none;
    font-size: var(--text-md);
    line-height: 1;
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s ease;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 12px rgba(21, 101, 192, 0.3);
}

.btn-primary:hover,
.btn-primary:focus {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(21, 101, 192, 0.4);
}

.btn-secondary {
    background: var(--color-surface);
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.btn-secondary:hover,
.btn-secondary:focus {
    background: var(--color-primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(21, 101, 192, 0.2);
}

.btn-accent {
    background: var(--gradient-accent);
    color: white;
    box-shadow: 0 4px 12px rgba(255, 152, 0, 0.3);
}

.btn-accent:hover,
.btn-accent:focus {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(255, 152, 0, 0.4);
}

.btn--loading {
    position: relative;
    color: transparent;
}

.btn--loading::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    top: 50%;
    left: 50%;
    margin-left: -10px;
    margin-top: -10px;
    border: 2px solid rgba(255, 255, 255, 0.6);
    border-radius: 50%;
    border-right-color: transparent;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* -------------------------- */
/* 6. NAVBAR MOBILE */
/* -------------------------- */
.navbar {
    background-color: var(--color-surface);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--color-border-light);
}

.navbar-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.25rem;
    font-weight: 900;
    color: var(--color-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo i {
    font-size: 1.5rem;
}

.nav-links {
    display: none;
}

.nav-links a {
    color: var(--color-text-primary);
    font-weight: 600;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-md);
    transition: all var(--transition-fast);
    position: relative;
}

.nav-links a:hover,
.nav-links a:focus {
    color: var(--color-primary);
    background-color: transparent;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 1rem;
    right: 1rem;
    height: 2px;
    background: var(--color-primary);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.nav-links a:hover::after {
    transform: scaleX(1);
}

.menu-toggle {
    display: block;
    font-size: 1.25rem;
    cursor: pointer;
    color: var(--color-primary);
    background: none;
    border: none;
    padding: 0.5rem;
    border-radius: var(--border-radius-sm);
    transition: background-color var(--transition-fast);
}

.menu-toggle:hover,
.menu-toggle:focus {
    background-color: var(--color-light);
}

/* -------------------------- */
/* 7. BOTÃO THEME TOGGLE */
/* -------------------------- */
.theme-toggle {
    background: var(--color-surface-variant);
    border: 2px solid var(--color-border-light);
    color: var(--color-text-primary);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    cursor: pointer;
}

.theme-toggle:hover {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
    transform: rotate(15deg);
}

[data-theme="dark"] .theme-toggle {
    background: var(--color-surface-variant);
    border-color: var(--color-border-light);
}

[data-theme="dark"] .theme-toggle:hover {
    background: var(--color-accent);
    color: var(--color-dark);
}

/* -------------------------- */
/* 8. HERO SECTION */
/* -------------------------- */
.blog-hero {
    padding: 2.5rem 0;
    text-align: center;
    background: var(--gradient-primary);
    color: white;
    position: relative;
    overflow: hidden;
}

[data-theme="dark"] .blog-hero {
    background: linear-gradient(135deg, #1a237e 0%, #004d40 100%);
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.blog-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000" opacity="0.03"><path fill="%23ffffff" d="M500,250c138,0,250,112,250,250S638,750,500,750S250,638,250,500S362,250,500,250z M500,200c-165,0-300,135-300,300s135,300,300,300s300-135,300-300S665,200,500,200L500,200z"/></svg>') center/contain no-repeat;
    z-index: 0;
}

.blog-hero .container {
    position: relative;
    z-index: 1;
}

.blog-hero h1 {
    font-size: 1.75rem;
    font-weight: 800;
    color: white;
    margin-bottom: var(--space-md);
    line-height: 1.2;
    position: relative;
    display: inline-block;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.blog-hero h1::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: var(--color-accent);
    border-radius: 2px;
}

.blog-hero p {
    font-size: 1rem;
    margin-bottom: var(--space-lg);
    color: white;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

/* -------------------------- */
/* 9. SEARCH AND FILTERS */
/* -------------------------- */
.blog-filters {
    /* Estilos base da seção de filtros, agora dentro do modal em mobile */
    padding: 0; /* Removido padding, será aplicado no modal-content */
    background-color: transparent;
    backdrop-filter: none;
    border-bottom: none;
    position: static;
    top: auto;
    z-index: auto;
}

.blog-filters .container {
    padding: 0;
}

.filter-modal {
    display: none; /* Escondido por padrão */
    position: fixed;
    z-index: 1002; /* Acima do menu mobile */
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.4); /* Fundo escuro */
    transition: opacity 0.3s ease;
}

.filter-modal.active {
    display: block;
}

.filter-modal .modal-content {
    background-color: var(--color-surface);
    margin: 15% auto; /* 15% do topo e centralizado */
    padding: var(--space-xl);
    border-radius: var(--border-radius-lg);
    width: 90%; /* Largura em mobile */
    max-width: 400px;
    position: relative;
    box-shadow: var(--shadow-xl);
    animation: slideIn 0.3s ease-out;
}

.modal-close-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: color 0.3s ease;
}

.modal-close-btn:hover {
    color: var(--color-primary);
}

@keyframes slideIn {
    from { transform: translateY(-50px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

/* Esconder o botão de filtros em desktop e mostrar a seção de filtros */
@media (min-width: 768px) {
    .filter-toggle-btn {
        display: none;
    }
    
    .search-container {
        flex-direction: row;
    }
    
    .search-controls {
        flex-grow: 0;
    }
    
    .search-controls .btn {
        flex-grow: 0;
    }
    
    /* Reaplicar estilos de filtros para desktop */
    .blog-filters {
        padding: 1.5rem 0;
        background-color: var(--color-surface);
        backdrop-filter: blur(10px);
        border-bottom: 1px solid var(--color-border-light);
        position: sticky;
        top: 60px;
        z-index: 999;
    }
    
    .blog-filters .container {
        padding: 0 var(--container-padding);
    }
    
    .filter-modal {
        display: none !important; /* Garantir que o modal não apareça em desktop */
    }
}

/* Ajuste para mobile para que o input e os botões fiquem em colunas */
@media (max-width: 767px) {
    .search-container {
        flex-direction: column;
    }
    
    .search-controls {
        display: flex;
        gap: var(--space-sm);
    }
    
    .search-input {
        width: 100%;
    }
    
    .filter-toggle-btn {
        flex-grow: 1;
    }
    
    .search-controls .btn {
        flex-grow: 1;
    }
}

.search-container {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
}

.search-controls {
    display: flex;
    gap: var(--space-sm);
}

.search-controls .btn {
    flex-grow: 1;
}

.filter-toggle-btn {
    flex-grow: 0;
    min-width: 100px; /* Para garantir que o texto "Filtros" caiba */
}

.search-input {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid var(--color-border-light);
    border-radius: var(--border-radius-md);
    font-size: var(--text-md);
    background-color: var(--color-surface);
    color: var(--color-text-primary);
    transition: all var(--transition-fast);
}

.search-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(21, 101, 192, 0.1);
}

.filters-container {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

/* Ajuste para filtros dentro do modal */
.filter-modal .filters-container {
    flex-direction: column;
}

.filter-modal .filter-group {
    flex-direction: column;
    align-items: flex-start;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.filter-group label {
    font-weight: 600;
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
}

.filter-select {
    padding: 0.5rem 1rem;
    border: 2px solid var(--color-border-light);
    border-radius: var(--border-radius-md);
    background-color: var(--color-surface);
    color: var(--color-text-primary);
    font-size: var(--text-sm);
    transition: all var(--transition-fast);
}

.filter-select:focus {
    outline: none;
    border-color: var(--color-primary);
}

.filter-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.filter-tag {
    padding: 0.5rem 1rem;
    background-color: var(--color-surface-variant);
    border: 2px solid var(--color-border-light);
    border-radius: 50px;
    font-size: var(--text-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    color: var(--color-text-secondary);
}

.filter-tag:hover,
.filter-tag.active {
    background: var(--gradient-primary);
    color: white;
    border-color: var(--color-primary);
    transform: translateY(-2px);
}

.results-info {
    margin-top: var(--space-md);
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}

/* -------------------------- */
/* 10. BLOG GRID */
/* -------------------------- */
.blog-grid {
    padding: 2rem 0 3rem;
    background-color: var(--color-background);
}

.articles-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-lg);
    margin-top: var(--space-lg);
}

.article-card {
    background-color: var(--color-surface);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    display: flex;
    flex-direction: column;
    height: 100%;
    border: 1px solid var(--color-border-light);
}

.article-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.article-image {
    height: 180px;
    overflow: hidden;
    position: relative;
}

.article-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

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

.article-content {
    padding: var(--space-md);
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.article-meta {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--space-sm);
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}

.article-category {
    background: var(--gradient-primary);
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: var(--border-radius-sm);
    font-size: var(--text-xs);
    font-weight: 600;
}

.article-title {
    font-size: 1.25rem;
    margin-bottom: var(--space-sm);
    line-height: 1.3;
    color: var(--color-text-primary);
}

.article-excerpt {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-md);
    flex-grow: 1;
    line-height: 1.5;
}

.article-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
}

.article-rating {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.rating-stars {
    display: flex;
    gap: 0.1rem;
}

.rating-star {
    color: var(--color-text-disabled);
    font-size: 0.9rem;
}

.rating-star.filled {
    color: var(--color-warning);
}

.rating-count {
    font-size: var(--text-xs);
    color: var(--color-text-secondary);
    margin-left: 0.25rem;
}

/* -------------------------- */
/* 11. LINKS MELHORADOS */
/* -------------------------- */
.read-more {
    color: var(--color-primary);
    font-weight: 600;
    font-size: var(--text-sm);
    display: flex;
    align-items: center;
    gap: 0.25rem;
    transition: all var(--transition-fast);
    position: relative;
    padding: 0.5rem 0;
}

.read-more::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--color-primary);
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.3s ease;
}

.read-more:hover::after {
    transform: scaleX(1);
    transform-origin: left;
}

.read-more:hover,
.read-more:focus {
    color: var(--color-primary-dark);
    gap: 0.5rem;
}

/* Botão de favorito */
.favorite-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    background: rgba(255, 255, 255, 0.9);
    border: none;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    z-index: 2;
}

[data-theme="dark"] .favorite-btn {
    background: rgba(30, 30, 30, 0.9);
    color: var(--color-text-primary);
}

.favorite-btn:hover {
    background: white;
    transform: scale(1.1);
}

[data-theme="dark"] .favorite-btn:hover {
    background: var(--color-surface);
}

.favorite-btn.active {
    color: #e74c3c;
}

.no-results {
    grid-column: 1 / -1;
    text-align: center;
    padding: var(--space-xxl);
    color: var(--color-text-secondary);
}

.no-results i {
    font-size: 3rem;
    margin-bottom: var(--space-md);
    color: var(--color-border-light);
}

/* -------------------------- */
/* 12. SKELETON LOADING */
/* -------------------------- */
.skeleton {
    background: linear-gradient(90deg, var(--color-surface-variant) 25%, var(--color-border-light) 50%, var(--color-surface-variant) 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
    border-radius: var(--border-radius-md);
}

@keyframes loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.skeleton-card {
    height: 400px;
    display: flex;
    flex-direction: column;
}

.skeleton-image {
    height: 180px;
    width: 100%;
    margin-bottom: var(--space-lg);
}

.skeleton-text {
    height: 1rem;
    margin-bottom: var(--space-sm);
    background: linear-gradient(90deg, var(--color-surface-variant) 25%, var(--color-border-light) 50%, var(--color-surface-variant) 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

.skeleton-text.short {
    width: 60%;
}

.skeleton-text.medium {
    width: 80%;
}

/* Reveal on scroll */
.reveal-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease-out;
}

.reveal-on-scroll.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* -------------------------- */
/* 13. PAGINATION */
/* -------------------------- */
.pagination {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-top: var(--space-xl);
}

.pagination-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: 2px solid var(--color-border-light);
    border-radius: var(--border-radius-md);
    background-color: var(--color-surface);
    color: var(--color-text-primary);
    font-weight: 600;
    transition: all var(--transition-fast);
}

.pagination-btn:hover,
.pagination-btn:focus {
    background: var(--gradient-primary);
    color: white;
    border-color: var(--color-primary);
    transform: translateY(-2px);
}

.pagination-btn.active {
    background: var(--gradient-primary);
    color: white;
    border-color: var(--color-primary);
}

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

.pagination-btn.disabled:hover {
    background-color: var(--color-surface);
    color: var(--color-text-primary);
    border-color: var(--color-border-light);
    transform: none;
}

/* -------------------------- */
/* 14. FOOTER */
/* -------------------------- */
.footer {
    padding: 2rem 0 1.5rem;
    background-color: var(--color-surface);
    color: var(--color-text-primary);
    text-align: center;
    border-top: 1px solid var(--color-border-light);
}

.footer-sitemap {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
    text-align: center;
}

.sitemap-column h4 {
    color: var(--color-text-primary);
    margin-bottom: var(--space-md);
    font-size: 1.1rem;
}

.sitemap-column ul {
    list-style: none;
}

.sitemap-column li {
    margin-bottom: var(--space-sm);
}

.sitemap-column a {
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

.sitemap-column a:hover,
.sitemap-column a:focus {
    color: var(--color-primary);
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
}

.footer-links a {
    color: var(--color-text-secondary);
    padding: 0.25rem 0.5rem;
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
}

.footer-links a:hover {
    color: var(--color-primary);
    background-color: rgba(255, 255, 255, 0.05);
}

.footer-social {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.footer-social a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--color-surface-variant);
    color: var(--color-text-primary);
    transition: all var(--transition-fast);
}

.footer-social a:hover,
.footer-social a:focus {
    background-color: var(--color-primary);
    color: white;
    transform: translateY(-2px);
}

/* Estilos para o Breadcrumb */
.breadcrumb {
    background-color: var(--color-surface-variant);
    border-bottom: 1px solid var(--color-border-light);
}

.breadcrumb .container {
    display: flex;
    align-items: center;
    font-size: var(--text-sm);
}

.breadcrumb-link {
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

.breadcrumb-link:hover {
    color: var(--color-primary);
}

.breadcrumb-separator {
    margin: 0 var(--space-sm);
    color: var(--color-text-disabled);
}

.breadcrumb-current {
    color: var(--color-text-primary);
    font-weight: 600;
}

/* Estilos para a Imagem do Artigo */
.article-image-container {
    width: 100%;
    max-height: 400px; /* Altura máxima para mobile */
    overflow: hidden;
    border-radius: var(--border-radius-lg);
    margin-top: var(--space-lg);
    box-shadow: var(--shadow-md);
}

.article-main-image {
    width: 100%;
    height: 100%;
    object-fit: contain; /* Exibir todo o conteúdo da imagem proporcionalmente */
    display: block;
}

/* Estilos para o Formulário de Comentários */
.comments-section {
    padding: var(--space-xl) 0;
    background-color: var(--color-surface-variant);
    border-top: 1px solid var(--color-border-light);
}

.comments-title {
    font-size: 1.5rem;
    margin-bottom: var(--space-xl);
    color: var(--color-primary-dark);
}

.comment-form {
    background-color: var(--color-surface);
    padding: var(--space-lg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
}

.comment-form h3 {
    margin-bottom: var(--space-lg);
    color: var(--color-primary);
}

.form-group {
    margin-bottom: var(--space-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--space-sm);
    font-weight: 600;
    color: var(--color-text-secondary);
}

.form-input,
.form-textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--color-border-medium);
    border-radius: var(--border-radius-md);
    font-size: var(--text-md);
    background-color: var(--color-background);
    color: var(--color-text-primary);
    transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(21, 101, 192, 0.1);
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

/* Estilos para Artigos Relacionados */
.related-articles-section {
    padding: var(--space-xl) 0;
    background-color: var(--color-background);
}

.related-articles-section .section-title {
    font-size: 1.75rem;
    text-align: center;
    margin-bottom: var(--space-xl);
    color: var(--color-primary-dark);
}

/* Ajustes para desktop */
@media (min-width: 768px) {
    .article-image-container {
        max-height: 500px;
    }
    
    .comments-title {
        text-align: center;
    }
    
    .related-articles-section .articles-grid {
        grid-template-columns: repeat(2, 1fr); /* 2 colunas em tablet */
    }
}

@media (min-width: 1024px) {
    .article-image-container {
        max-height: 600px;
    }
    
    .related-articles-section .articles-grid {
        grid-template-columns: repeat(4, 1fr); /* 4 colunas em desktop */
    }
}bile-menu {
    position: fixed;
    top: 0;
    right: -300px;
    width: 280px;
    height: 100vh;
    background-color: var(--color-surface);
    z-index: 1001;
    padding-top: 5rem;
    transition: right 0.3s;
    color: var(--color-text-primary);
    border-left: 1px solid var(--color-border-light);
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.1);
}

#mobile-menu nav {
    display: flex;
    flex-direction: column;
    padding: 1rem;
}

#mobile-menu a {
    color: var(--color-text-primary);
    margin-bottom: 0.5rem;
    padding: 0.75rem 1rem;
    border-radius: var(--border-radius-md);
    transition: all var(--transition-fast);
    border: 1px solid transparent;
}

#mobile-menu a:hover {
    background-color: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

#mobile-menu .theme-toggle {
    margin: 0.5rem 1rem;
    width: calc(100% - 2rem);
    border-radius: var(--border-radius-md);
    justify-content: flex-start;
    padding: 0 1rem;
    gap: 0.75rem;
}

/* -------------------------- */
/* 16. MEDIA QUERIES - TABLET */
/* -------------------------- */
@media (min-width: 768px) {
    html {
        font-size: 16px;
    }
    
    .container {
        max-width: 720px;
        --container-padding: 1.5rem;
    }
    
    h1 { font-size: 2.25rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.5rem; }
    
    .blog-hero {
        padding: 3.5rem 0;
    }
    
    .blog-hero h1 {
        font-size: 2.5rem;
    }
    
    .search-container {
        flex-direction: row;
    }
    
    .filters-container {
        flex-direction: row;
        flex-wrap: wrap;
    }
    
    .filter-group {
        flex-direction: row;
        align-items: center;
    }
    
    .articles-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-xl);
    }
    
    .footer-sitemap {
        grid-template-columns: repeat(2, 1fr);
        text-align: left;
    }
    
    .footer-links {
        flex-direction: row;
        justify-content: center;
    }
    
    /* Navbar Desktop */
    .menu-toggle {
        display: none;
    }
    
    .nav-links {
        display: flex;
        align-items: center;
        gap: 1.5rem;
    }
    
    .btn-app {
        display: inline-flex !important;
    }
}

/* -------------------------- */
/* 17. MEDIA QUERIES - DESKTOP */
/* -------------------------- */
@media (min-width: 1024px) {
    .container {
        max-width: 1200px;
    }
    
    .articles-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .footer-sitemap {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .blog-hero {
        padding: 4rem 0;
    }
}

/* -------------------------- */
/* 18. MEDIA QUERIES - LARGE DESKTOP */
/* -------------------------- */
@media (min-width: 1440px) {
    .container {
        max-width: 1400px;
    }
    
    .articles-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* -------------------------- */
/* 19. TOOLTIPS */
/* -------------------------- */
.tooltip {
    position: relative;
    display: inline-block;
}

.tooltip .tooltiptext {
    visibility: hidden;
    width: 120px;
    background-color: var(--color-surface);
    color: var(--color-text-primary);
    text-align: center;
    border-radius: var(--border-radius-sm);
    padding: 5px;
    position: absolute;
    z-index: 1;
    bottom: 125%;
    left: 50%;
    margin-left: -60px;
    opacity: 0;
    transition: opacity var(--transition-normal);
    font-size: var(--text-xs);
    border: 1px solid var(--color-border-light);
    box-shadow: var(--shadow-md);
}

.tooltip .tooltiptext::after {
    content: "";
    position: absolute;
    top: 100%;
    left: 50%;
    margin-left: -5px;
    border-width: 5px;
    border-style: solid;
    border-color: var(--color-surface) transparent transparent transparent;
}

.tooltip:hover .tooltiptext {
    visibility: visible;
    opacity: 1;
}

/* -------------------------- */
/* 20. TRANSITIONS GLOBAIS */
/* -------------------------- */
* {
    transition: background-color 0.3s ease, 
                border-color 0.3s ease, 
                color 0.3s ease,
                transform 0.3s ease,
                box-shadow 0.3s ease;
}

/* Excluir elementos que não precisam de transição */
img,
svg,
video,
iframe,
.skeleton,
.theme-toggle i {
    transition: none !important;
}

/* -------------------------- */
/* 21. MELHORIAS MOBILE */
/* -------------------------- */
@media (max-width: 767px) {
    /* Melhorar topos sticky para mobile */
    .blog-filters {
        top: 56px;
    }
    
    /* Melhorar área de toque */
    .btn, .filter-tag, .pagination-btn {
        min-height: 44px;
        min-width: 44px;
    }
    
    /* Otimizar espaçamento */
    .article-content {
        padding: 1rem;
    }
    
    /* Melhorar legibilidade */
    .article-excerpt {
        font-size: 0.9rem;
        line-height: 1.5;
    }
    
    .blog-hero {
        padding: 2rem 0;
    }
    
    .blog-hero h1 {
        font-size: 1.5rem;
    }
    
    .search-container {
        flex-direction: column;
    }
}