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

:root {
    /* Cores */
    --primary-color: #1e3a8a;
    --secondary-color: #f59e0b;
    --accent-color: #3b82f6;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-light: #94a3b8;
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #e2e8f0;
    --border-color: #e2e8f0;
    --shadow-light: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-heavy: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    
    /* Tipografia */
    --font-serif: Georgia, 'Times New Roman', serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'Fira Code', 'Courier New', monospace;
    
    /* Espaçamentos */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Breakpoints */
    --mobile: 768px;
    --tablet: 1024px;
    --desktop: 1280px;
    
    /* Layout */
    --sidebar-width: 280px;
    --header-height: 80px;
    --content-max-width: 1200px;
}

/* Configurações globais */
html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-sans);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
    color: white;
    z-index: 1000;
    box-shadow: var(--shadow-medium);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    padding: 0 var(--spacing-lg);
    max-width: var(--content-max-width);
    margin: 0 auto;
    gap: var(--spacing-lg);
}

.header-title {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
    flex-shrink: 0;
}

.header-subtitle {
    font-size: 0.875rem;
    opacity: 0.9;
    margin: 0;
    display: none;
}

/* Search */
.search-container {
    display: flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    padding: var(--spacing-xs);
    backdrop-filter: blur(10px);
    flex: 1;
    max-width: 300px;
}

.search-input {
    background: transparent;
    border: none;
    color: white;
    padding: var(--spacing-sm);
    font-size: 0.875rem;
    flex: 1;
    outline: none;
}

.search-input::placeholder {
    color: rgba(255, 255, 255, 0.7);
}

.search-btn {
    background: transparent;
    border: none;
    color: white;
    padding: var(--spacing-sm);
    cursor: pointer;
    border-radius: 4px;
    transition: background-color 0.2s;
}

.search-btn:hover {
    background: rgba(255, 255, 255, 0.1);
}

/* Toggle Cronologia */
.chronology-toggle {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

.toggle-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
    cursor: pointer;
    user-select: none;
}

.toggle-input {
    display: none;
}

.toggle-slider {
    position: relative;
    width: 48px;
    height: 24px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    transition: background-color 0.3s;
}

.toggle-slider::before {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 20px;
    height: 20px;
    background: white;
    border-radius: 50%;
    transition: transform 0.3s;
}

.toggle-input:checked + .toggle-slider {
    background: var(--secondary-color);
}

.toggle-input:checked + .toggle-slider::before {
    transform: translateX(24px);
}

/* Mobile Menu */
.mobile-menu-btn {
    display: none;
    background: transparent;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: 4px;
    transition: background-color 0.2s;
}

.mobile-menu-btn:hover {
    background: rgba(255, 255, 255, 0.1);
}

/* Main Container */
.main-container {
    display: flex;
    margin-top: var(--header-height);
    min-height: calc(100vh - var(--header-height));
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    position: fixed;
    top: var(--header-height);
    left: 0;
    height: calc(100vh - var(--header-height));
    overflow-y: auto;
    z-index: 100;
    transition: transform 0.3s ease;
}

.sidebar-content {
    padding: var(--spacing-lg);
}

.nav-menu {
    list-style: none;
}

.nav-menu > li {
    margin-bottom: var(--spacing-sm);
}

.nav-section-title {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-sm);
    display: block;
}

.nav-submenu {
    list-style: none;
    margin-left: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.nav-submenu li {
    margin-bottom: var(--spacing-xs);
}

.nav-link {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-primary);
    text-decoration: none;
    border-radius: 6px;
    transition: all 0.2s;
    font-size: 0.875rem;
    position: relative;
}

.nav-link:hover {
    background: var(--bg-tertiary);
    color: var(--primary-color);
    transform: translateX(4px);
}

.nav-link.active {
    background: var(--primary-color);
    color: white;
    font-weight: 500;
}

.nav-link.active::before {
    content: '';
    position: absolute;
    left: -var(--spacing-lg);
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 100%;
    background: var(--secondary-color);
    border-radius: 0 2px 2px 0;
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: var(--spacing-2xl);
    max-width: calc(var(--content-max-width) - var(--sidebar-width));
}

/* Content Sections */
.content-section {
    margin-bottom: var(--spacing-3xl);
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.6s ease forwards;
}

.content-section:nth-child(even) {
    animation-delay: 0.1s;
}

.content-section:nth-child(odd) {
    animation-delay: 0.2s;
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.content-section h2 {
    font-family: var(--font-serif);
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--secondary-color);
    position: relative;
}

.content-section h2::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 60px;
    height: 2px;
    background: var(--secondary-color);
}

.content-section h3 {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    color: var(--text-primary);
    margin: var(--spacing-xl) 0 var(--spacing-md) 0;
}

.content-section p {
    margin-bottom: var(--spacing-md);
    text-align: justify;
    line-height: 1.7;
}

/* Note Box */
.note-box {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    border: 1px solid #f59e0b;
    border-radius: 8px;
    padding: var(--spacing-lg);
    margin: var(--spacing-xl) 0;
    position: relative;
}

.note-box::before {
    content: '💡';
    position: absolute;
    top: var(--spacing-md);
    left: var(--spacing-md);
    font-size: 1.2rem;
}

.note-box h3 {
    color: #92400e;
    margin: 0 0 var(--spacing-md) var(--spacing-xl);
    font-size: 1.1rem;
}

.note-box p {
    margin: 0 0 0 var(--spacing-xl);
    color: #92400e;
}

/* Differences Container */
.differences-container {
    margin: var(--spacing-xl) 0;
}

.difference-item {
    background: var(--bg-secondary);
    border-radius: 8px;
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    border-left: 4px solid var(--primary-color);
    transition: transform 0.2s, box-shadow 0.2s;
}

.difference-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.difference-item h3 {
    color: var(--primary-color);
    margin: 0 0 var(--spacing-md) 0;
    font-size: 1.1rem;
}

.difference-item p {
    margin: 0;
}

/* References */
.ref-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    padding: 1px 3px;
    border-radius: 3px;
    transition: all 0.2s;
    position: relative;
}

.ref-link:hover {
    background: var(--primary-color);
    color: white;
    cursor: pointer;
}

.references-list {
    font-size: 0.875rem;
    line-height: 1.6;
}

.reference-item {
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-sm);
    border-radius: 4px;
    transition: background-color 0.2s;
}

.reference-item:hover {
    background: var(--bg-secondary);
}

.reference-number {
    font-weight: 600;
    color: var(--primary-color);
    margin-right: var(--spacing-sm);
    font-family: var(--font-mono);
}

.reference-url {
    color: var(--accent-color);
    text-decoration: none;
    word-break: break-all;
}

.reference-url:hover {
    text-decoration: underline;
}

/* Back to Top */
.back-to-top {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    width: 48px;
    height: 48px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
    z-index: 1000;
    box-shadow: var(--shadow-medium);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--accent-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-heavy);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.modal-content {
    background-color: var(--bg-primary);
    margin: 10% auto;
    padding: var(--spacing-xl);
    border-radius: 12px;
    width: 90%;
    max-width: 600px;
    position: relative;
    box-shadow: var(--shadow-heavy);
    animation: modalSlideIn 0.3s ease;
}

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

.modal-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-lg);
    font-size: 2rem;
    cursor: pointer;
    color: var(--text-secondary);
    transition: color 0.2s;
}

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

/* Utility Classes */
.text-center { text-align: center; }
.text-right { text-align: right; }
.font-mono { font-family: var(--font-mono); }
.font-serif { font-family: var(--font-serif); }
.text-primary { color: var(--primary-color); }
.text-secondary { color: var(--text-secondary); }
.bg-secondary { background-color: var(--bg-secondary); }
.hidden { display: none; }
.visible { display: block; }

/* Scrollbar personalizada */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-light);
}

/* Print Styles */
@media print {
    .header,
    .sidebar,
    .back-to-top,
    .search-container,
    .chronology-toggle,
    .mobile-menu-btn {
        display: none !important;
    }
    
    .main-content {
        margin-left: 0;
        padding: 0;
        max-width: none;
    }
    
    .content-section {
        page-break-inside: avoid;
        margin-bottom: var(--spacing-lg);
    }
    
    .ref-link {
        color: var(--text-primary);
        text-decoration: none;
    }
    
    .ref-link::after {
        content: " [" attr(href) "]";
        font-size: 0.8em;
        color: var(--text-secondary);
    }
}