/* Main CSS - Design System Instituto AlphaPro */

:root {
    /* Cores da Marca - Paleta Gold/Orange */
    --gold-50: #fef5e7;
    --gold-100: #fdebd0;
    --gold-200: #f9d79e;
    --gold-300: #f7c56c;
    --gold-400: #f39c12;
    --gold-500: #e67e22; /* Cor principal */
    --gold-600: #d35400;
    --gold-700: #ba4a00;
    --gold-800: #922b00;
    --gold-900: #6a1c00;

    /* Cores Neutras */
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;

    /* Cores de Status */
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --info: #3b82f6;

    /* Tipografia */
    --font-serif: 'EB Garamond', Georgia, serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

    /* 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;

    /* Sombras */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);

    /* Bordas */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;

    /* ========================================
       VARIÁVEIS SEMÂNTICAS - MODO CLARO (padrão)
       ======================================== */
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #f3f4f6;
    --bg-hero: linear-gradient(135deg, #e8f0f9 0%, #d4e3f3 50%, #ffffff 100%);

    --text-primary: #111827;
    --text-secondary: #374151;
    --text-tertiary: #6b7280;
    --text-inverted: #ffffff;

    --border-primary: #e5e7eb;
    --border-secondary: #d1d5db;
    --border-accent: #1a365b;

    --accent-primary: #1a365b;
    --accent-secondary: #2a4a7c;
    --accent-hover: #0d1b2d;

    --surface-card: #ffffff;
    --surface-hover: #f9fafb;

    /* Sombras semânticas */
    --shadow-card: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-elevated: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

/* ========================================
   MODO ESCURO
   ======================================== */
[data-theme="dark"] {
    /* Backgrounds */
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #1c2128;
    --bg-hero: linear-gradient(135deg, #1c2128 0%, #161b22 50%, #0d1117 100%);

    /* Textos */
    --text-primary: #e6edf3;
    --text-secondary: #c9d1d9;
    --text-tertiary: #8b949e;
    --text-inverted: #0d1117;

    /* Bordas */
    --border-primary: #30363d;
    --border-secondary: #21262d;
    --border-accent: #b38d67;

    /* Acentos (dourado da marca para modo escuro) */
    --accent-primary: #b38d67;
    --accent-secondary: #c9a582;
    --accent-hover: #8c6d4f;

    /* Superfícies */
    --surface-card: #161b22;
    --surface-hover: #1c2128;

    /* Sombras mais escuras */
    --shadow-card: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-elevated: 0 10px 15px -3px rgba(0, 0, 0, 0.5);

    /* Ajustes nas cores da marca para contraste */
    --gold-50: #1c2128;
    --gold-100: #21262d;
    --gold-200: #30363d;
    --gold-300: #f7c56c;
    --gold-400: #f39c12;
    --gold-500: #e67e22;

    /* Grays invertidos */
    --gray-50: #1c2128;
    --gray-100: #21262d;
    --gray-200: #30363d;
    --gray-300: #484f58;
    --gray-400: #6e7681;
    --gray-500: #8b949e;
    --gray-600: #c9d1d9;
    --gray-700: #e6edf3;
    --gray-800: #ecf2f8;
    --gray-900: #f0f6fc;

    /* Status colors ajustados para dark mode */
    --success: #3fb950;
    --warning: #d29922;
    --error: #f85149;
    --info: #58a6ff;
}

/* ========================================
   TRANSIÇÃO SUAVE ENTRE TEMAS
   ======================================== */
body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Transições para elementos principais */
.header,
.navbar,
.article-hero,
.article-body,
.article-sidebar,
.footer,
.article-card,
.author-card,
.cta-card,
.table-of-contents,
.reference-item,
.category-btn {
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

@media (min-width: 640px) {
    .container { padding: 0 var(--spacing-lg); }
}

@media (min-width: 1024px) {
    .container { padding: 0 var(--spacing-xl); }
}

/* Header Styles */
.header {
    background: var(--bg-primary);
    box-shadow: var(--shadow-card);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-top {
    background: var(--accent-primary);
    color: var(--text-inverted);
    padding: var(--spacing-sm) 0;
    font-size: 0.875rem;
}

.header-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.navbar {
    padding: var(--spacing-md) 0;
    background: var(--bg-primary);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-lg);
}

.navbar-brand .logo {
    height: 50px;
    width: auto;
}

/* Theme Toggle Button */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--bg-secondary);
    border: 2px solid var(--border-secondary);
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
    padding: 0;
    margin-left: auto;
}

.theme-toggle:hover {
    background: var(--surface-hover);
    border-color: var(--accent-secondary);
    transform: translateY(-2px);
}

.theme-toggle:active {
    transform: translateY(0);
}

.theme-toggle-icon {
    width: 20px;
    height: 20px;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.3s ease, transform 0.3s ease;
}

.theme-toggle:hover .theme-toggle-icon {
    color: var(--accent-primary);
    transform: rotate(15deg);
}

.theme-toggle-icon svg {
    width: 100%;
    height: 100%;
}

/* Mobile: ajustar posicionamento */
@media (max-width: 768px) {
    .theme-toggle {
        width: 36px;
        height: 36px;
        margin-left: var(--spacing-md);
    }

    .theme-toggle-icon {
        width: 18px;
        height: 18px;
    }
}

.navbar-menu {
    display: none;
    gap: var(--spacing-xl);
    align-items: center;
}

@media (min-width: 768px) {
    .navbar-menu {
        display: flex;
    }
}

.navbar-menu a {
    color: var(--text-secondary);
    font-weight: 500;
    position: relative;
    padding: var(--spacing-sm) 0;
}

.navbar-menu a:hover {
    color: var(--accent-primary);
}

.navbar-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-primary);
    transition: width 0.3s ease;
}

.navbar-menu a:hover::after {
    width: 100%;
}

/* Mobile Menu Toggle */
.navbar-toggle {
    display: flex;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
    padding: var(--spacing-sm);
}

@media (min-width: 768px) {
    .navbar-toggle {
        display: none;
    }
}

.navbar-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-secondary);
    transition: all 0.3s ease;
    border-radius: 2px;
}

/* CTA Button Styles */
.cta-button, .cta-button-primary {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    background: linear-gradient(135deg, var(--accent-secondary), var(--accent-primary));
    color: var(--text-inverted);
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
    box-shadow: var(--shadow-card);
    text-align: center;
}

.cta-button:hover, .cta-button-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-elevated);
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-hover));
}

/* Article Hero */
.article-hero {
    background: var(--bg-hero);
    padding: var(--spacing-3xl) 0 var(--spacing-2xl);
    position: relative;
    overflow: hidden;
}

.article-hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--accent-secondary) 0%, transparent 70%);
    opacity: 0.3;
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(10deg); }
}

.breadcrumb {
    font-size: 0.875rem;
    color: var(--text-tertiary);
    margin-bottom: var(--spacing-lg);
}

.breadcrumb a {
    color: var(--accent-primary);
    font-weight: 500;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

.article-title {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 5vw, 3.5rem);
    color: var(--text-primary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.1;
}

.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xl);
    align-items: center;
}

.author-info {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.author-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    border: 3px solid var(--accent-secondary);
}

.author-details {
    display: flex;
    flex-direction: column;
}

.author-name {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1.125rem;
}

.author-credentials {
    color: var(--text-tertiary);
    font-size: 0.875rem;
}

.article-info {
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

/* Content Layout */
.content-wrapper {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
    padding: var(--spacing-2xl) 0;
}

@media (min-width: 1024px) {
    .content-wrapper {
        grid-template-columns: 1fr 350px;
    }
}

/* Article Body */
.article-body {
    background: var(--surface-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-card);
}

.slogan-banner {
    background: linear-gradient(135deg, var(--bg-secondary), var(--bg-tertiary));
    border-left: 4px solid var(--accent-primary);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
    border-radius: var(--radius-md);
}

.slogan-banner h2 {
    font-family: var(--font-serif);
    color: var(--accent-primary);
    font-size: 1.75rem;
    margin-bottom: var(--spacing-sm);
}

.slogan-banner p {
    color: var(--text-secondary);
    font-size: 1.125rem;
}

/* Table of Contents */
.table-of-contents {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
    border: 1px solid var(--border-primary);
}

.table-of-contents h3 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    font-size: 1.25rem;
}

.table-of-contents ol {
    counter-reset: toc;
    list-style: none;
}

.table-of-contents li {
    counter-increment: toc;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--border-primary);
}

.table-of-contents li::before {
    content: counter(toc) ".";
    color: var(--accent-primary);
    font-weight: 600;
    margin-right: var(--spacing-sm);
}

.table-of-contents a {
    color: var(--text-secondary);
}

.table-of-contents a:hover {
    color: var(--accent-primary);
}

/* Article Content Typography */
.content {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text-secondary);
}

.content h2 {
    font-family: var(--font-serif);
    font-size: 2rem;
    color: var(--text-primary);
    margin: var(--spacing-2xl) 0 var(--spacing-lg);
}

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

.content p {
    margin-bottom: var(--spacing-lg);
}

.content ul, .content ol {
    margin: var(--spacing-lg) 0;
    padding-left: var(--spacing-xl);
}

.content ul {
    list-style: disc;
}

.content ol {
    list-style: decimal;
}

.content li {
    margin-bottom: var(--spacing-sm);
}

.content blockquote {
    border-left: 4px solid var(--accent-secondary);
    padding-left: var(--spacing-lg);
    margin: var(--spacing-xl) 0;
    font-style: italic;
    color: var(--text-tertiary);
    background: var(--bg-secondary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
}

.content table {
    width: 100%;
    margin: var(--spacing-xl) 0;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.content th {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    padding: var(--spacing-md);
    text-align: left;
    font-weight: 600;
}

.content td {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-primary);
}

.content tr:hover {
    background: var(--surface-hover);
}

/* References Section */
.references-section {
    margin-top: var(--spacing-3xl);
    padding-top: var(--spacing-2xl);
    border-top: 2px solid var(--border-primary);
}

.references-section h2 {
    font-family: var(--font-serif);
    color: var(--text-primary);
    margin-bottom: var(--spacing-xl);
}

.references-grid {
    display: grid;
    gap: var(--spacing-md);
}

.reference-item {
    background: var(--bg-secondary);
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--accent-secondary);
    font-size: 0.875rem;
    line-height: 1.6;
}

.reference-item a {
    color: var(--accent-primary);
    font-weight: 500;
}

/* Article CTA */
.article-cta {
    margin-top: var(--spacing-3xl);
}

.cta-card {
    background: linear-gradient(135deg, var(--bg-secondary), var(--surface-card));
    border: 2px solid var(--border-accent);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    text-align: center;
}

.cta-card h3 {
    font-family: var(--font-serif);
    color: var(--text-primary);
    font-size: 1.75rem;
    margin-bottom: var(--spacing-md);
}

.cta-card p {
    color: var(--text-secondary);
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xl);
}

.cta-benefits {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.benefit {
    background: var(--surface-card);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-weight: 500;
    box-shadow: var(--shadow-sm);
}

.cta-note {
    display: block;
    margin-top: var(--spacing-md);
    color: var(--text-tertiary);
    font-size: 0.875rem;
}

/* Sidebar */
.article-sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.author-card, .related-articles, .newsletter-card {
    background: var(--surface-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-card);
    border: 1px solid var(--border-primary);
}

.author-card {
    text-align: center;
}

.author-photo {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    margin: 0 auto var(--spacing-lg);
    border: 4px solid var(--accent-secondary);
}

.author-card h3 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.author-title {
    color: var(--accent-primary);
    font-weight: 500;
    margin-bottom: var(--spacing-md);
}

.author-bio {
    color: var(--text-tertiary);
    font-size: 0.875rem;
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
}

.author-credentials-list {
    text-align: left;
    margin-bottom: var(--spacing-lg);
}

.credential {
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--border-primary);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.sidebar-cta {
    display: block;
    width: 100%;
    padding: var(--spacing-md);
    background: var(--accent-primary);
    color: var(--text-inverted);
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
}

.sidebar-cta:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
}

/* Newsletter Form */
.newsletter-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.newsletter-form input {
    padding: var(--spacing-md);
    border: 2px solid var(--border-secondary);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: border-color 0.3s ease;
    background: var(--bg-primary);
    color: var(--text-primary);
}

.newsletter-form input:focus {
    outline: none;
    border-color: var(--accent-secondary);
}

.newsletter-form button {
    padding: var(--spacing-md);
    background: var(--accent-primary);
    color: var(--text-inverted);
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
}

.newsletter-form button:hover {
    background: var(--accent-hover);
}

/* Footer */
.footer {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
    margin-top: var(--spacing-3xl);
    border-top: 1px solid var(--border-primary);
}

[data-theme="dark"] .footer {
    background: #0a0e13;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-logo {
    height: 40px;
    margin-bottom: var(--spacing-md);
}

[data-theme="dark"] .footer-logo {
    filter: brightness(0) invert(1);
}

.footer h4 {
    color: var(--accent-secondary);
    margin-bottom: var(--spacing-md);
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-links a {
    color: var(--text-tertiary);
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--accent-secondary);
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.social-links a {
    display: inline-block;
    width: 40px;
    height: 40px;
    background: var(--bg-secondary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.social-links a:hover {
    background: var(--accent-primary);
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border-primary);
    color: var(--text-tertiary);
    font-size: 0.875rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .article-body {
        padding: var(--spacing-lg);
    }

    .content {
        font-size: 1rem;
    }

    .cta-benefits {
        grid-template-columns: 1fr;
    }
}