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

:root {
    --primary: #0066CC;
    --primary-dark: #0052A3;
    --secondary: #0099FF;
    --text-primary: #1a1a1a;
    --text-secondary: #666;
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --border: #e0e0e0;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.15);
    --header-height: 64px;
    --sidebar-width: 280px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-secondary);
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    z-index: 1000;
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    height: 100%;
    padding: 0 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--primary);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.btn-toc {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
    transition: background var(--transition);
}

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

.search-container {
    position: relative;
    width: 100%;
    max-width: 400px;
}

.search-container input {
    width: 100%;
    padding: 0.625rem 1rem 0.625rem 2.5rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.9375rem;
    transition: border var(--transition), box-shadow var(--transition);
}

.search-container input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

.search-icon {
    position: absolute;
    left: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    pointer-events: none;
}

/* Sidebar */
.sidebar {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: var(--sidebar-width);
    height: calc(100vh - var(--header-height));
    background: var(--bg-primary);
    border-right: 1px solid var(--border);
    overflow-y: auto;
    transform: translateX(-100%);
    transition: transform var(--transition);
    z-index: 900;
}

.sidebar.active {
    transform: translateX(0);
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem 1rem;
    border-bottom: 1px solid var(--border);
}

.sidebar-header h2 {
    font-size: 1.125rem;
    font-weight: 600;
}

.btn-close {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.25rem;
    color: var(--text-secondary);
    transition: color var(--transition);
}

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

.toc {
    padding: 1rem 0;
}

.toc a {
    display: block;
    padding: 0.625rem 1.5rem;
    color: var(--text-primary);
    text-decoration: none;
    transition: background var(--transition), color var(--transition);
    border-left: 3px solid transparent;
}

.toc a:hover {
    background: var(--bg-secondary);
    color: var(--primary);
}

.toc a.active {
    background: rgba(0, 102, 204, 0.08);
    color: var(--primary);
    border-left-color: var(--primary);
    font-weight: 500;
}

.toc a.toc-h2 {
    font-size: 0.9375rem;
    font-weight: 500;
}

.toc a.toc-h3 {
    font-size: 0.875rem;
    padding-left: 2.5rem;
    color: var(--text-secondary);
}

/* Overlay */
.overlay {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition), visibility var(--transition);
    z-index: 850;
}

.overlay.active {
    opacity: 1;
    visibility: visible;
}

/* Main content */
.main-content {
    max-width: 900px;
    margin: 0 auto;
    padding: calc(var(--header-height) + 2rem) 1rem 2rem;
    min-height: 100vh;
}

.main-content h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.main-content h2 {
    font-size: 1.875rem;
    font-weight: 600;
    margin-top: 3rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--border);
    color: var(--text-primary);
}

.main-content h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-top: 2rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.main-content p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
    font-size: 1rem;
}

.main-content strong {
    color: var(--text-primary);
    font-weight: 600;
}

.main-content ul, .main-content ol {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
}

.main-content li {
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.main-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    background: var(--bg-primary);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.main-content thead {
    background: var(--primary);
    color: white;
}

.main-content th, .main-content td {
    padding: 0.875rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.main-content th {
    font-weight: 600;
    font-size: 0.9375rem;
}

.main-content td {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

.main-content tbody tr:last-child td {
    border-bottom: none;
}

.main-content tbody tr:hover {
    background: var(--bg-secondary);
}

.main-content blockquote {
    margin: 1.5rem 0;
    padding: 1rem 1.5rem;
    background: rgba(0, 102, 204, 0.05);
    border-left: 4px solid var(--primary);
    border-radius: 4px;
}

.main-content blockquote p {
    margin: 0;
    color: var(--text-primary);
}

.main-content code {
    background: var(--bg-secondary);
    padding: 0.125rem 0.375rem;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 0.875rem;
    color: var(--primary);
}

.main-content hr {
    margin: 2rem 0;
    border: none;
    border-top: 1px solid var(--border);
}

/* Placeholder para mídia */
.media-placeholder {
    background: var(--bg-secondary);
    border: 2px dashed var(--border);
    border-radius: 8px;
    padding: 2rem;
    margin: 1.5rem 0;
    text-align: center;
    color: var(--text-secondary);
    font-style: italic;
}

.media-placeholder svg {
    width: 48px;
    height: 48px;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

/* Highlight de busca */
.highlight {
    background: #ffeb3b;
    padding: 0.125rem 0.25rem;
    border-radius: 2px;
}

/* Botão voltar ao topo */
.btn-scroll-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 48px;
    height: 48px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition), visibility var(--transition), background var(--transition);
    z-index: 800;
}

.btn-scroll-top.visible {
    opacity: 1;
    visibility: visible;
}

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

/* Responsivo */
@media (min-width: 768px) {
    .sidebar {
        transform: translateX(0);
    }

    .main-content {
        margin-left: var(--sidebar-width);
    }

    .btn-toc {
        display: none;
    }

    .btn-close {
        display: none;
    }

    .overlay {
        display: none;
    }
}

@media (max-width: 767px) {
    :root {
        --header-height: 56px;
    }

    .header-container {
        padding: 0 0.75rem;
    }

    .logo span {
        display: none;
    }

    .search-container {
        max-width: none;
        flex: 1;
    }

    .main-content {
        padding: calc(var(--header-height) + 1rem) 0.75rem 1rem;
    }

    .main-content h1 {
        font-size: 1.875rem;
    }

    .main-content h2 {
        font-size: 1.5rem;
    }

    .main-content h3 {
        font-size: 1.25rem;
    }

    .btn-scroll-top {
        bottom: 1rem;
        right: 1rem;
        width: 40px;
        height: 40px;
    }

    .main-content table {
        font-size: 0.875rem;
    }

    .main-content th, .main-content td {
        padding: 0.625rem 0.75rem;
    }
}

@media (max-width: 480px) {
    .main-content h1 {
        font-size: 1.5rem;
    }

    .main-content h2 {
        font-size: 1.25rem;
    }

    .main-content h3 {
        font-size: 1.125rem;
    }

    .main-content p, .main-content li {
        font-size: 0.9375rem;
    }
}

/* Print */
@media print {
    .header, .sidebar, .btn-scroll-top, .btn-toc, .search-container {
        display: none;
    }

    .main-content {
        margin-left: 0;
        padding: 0;
    }

    .main-content h2 {
        page-break-after: avoid;
    }

    .main-content table {
        page-break-inside: avoid;
    }
}

/* Tutorial Screenshots */
.tutorial-screenshot {
    margin: 20px 0 28px 0;
    text-align: center;
}
.tutorial-screenshot img {
    max-width: 100%;
    border-radius: 10px;
    border: 1px solid #e2e8f0;
    box-shadow: 0 4px 16px rgba(0,0,0,0.10), 0 1px 4px rgba(0,0,0,0.06);
    display: block;
    margin: 0 auto;
    transition: box-shadow 0.2s, transform 0.2s;
}
.tutorial-screenshot img:hover {
    box-shadow: 0 8px 28px rgba(0,0,0,0.16), 0 2px 8px rgba(0,0,0,0.08);
    transform: scale(1.01);
    cursor: zoom-in;
}
.screenshot-caption {
    text-align: center;
    font-size: 0.82em;
    color: #64748b;
    margin-top: 6px;
    font-style: italic;
    line-height: 1.4;
}

/* Lightbox */
.lightbox-overlay {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.88);
    z-index: 9999;
    align-items: center;
    justify-content: center;
    cursor: zoom-out;
}
.lightbox-overlay.active {
    display: flex;
}
.lightbox-overlay img {
    max-width: 92vw;
    max-height: 90vh;
    border-radius: 8px;
    box-shadow: 0 8px 40px rgba(0,0,0,0.5);
}