/* =========================================
   STYLE.CSS - FORCED DARK MODE
   ========================================= */

/* --- Variáveis Globais (Dark Theme) --- */
:root {
    /* -- BASES -- */
    /* Fundo da página: Quase preto (Slate 950) */
    --background: #020617;
    
    /* Cor do Texto Principal: Branco Off-white (Slate 50) */
    --foreground: #F8FAFC; 
    
    /* Fundo dos Cards e Elementos Secundários (Seu Azul Navy Original) */
    --card-bg: #0A2342;
    --card-fg: #E2E8F0; /* Texto dentro dos cards */

    /* -- DESTAQUES (Cores mais vibrantes para brilhar no escuro) -- */
    /* Primary: Azul Celeste Brilhante (Sky 400) */
    --primary: #38BDF8; 
    --primary-fg: #020617; /* Texto preto para contraste no botão azul */
    
    /* Secondary: Azul um pouco mais suave (Sky 300) */
    --secondary: #7DD3FC;
    --secondary-fg: #020617;
    
    /* Accent: Cinza/Azulado para detalhes (Slate 400) */
    --accent: #94A3B8;
    --accent-fg: #020617;
    
    /* Muted: Usado para badges e fundos sutis */
    --muted: #1E293B;
    --muted-fg: #94A3B8;
    
    /* Bordas sutis */
    --border: #1E293B;
    --radius: 0.75rem;
    
    /* Fontes */
    --font-sans: "Geist", system-ui, -apple-system, sans-serif;
    --font-mono: "Geist Mono", monospace;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: var(--background);
    color: var(--foreground);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    padding-bottom: 8rem;
}

main {
    padding-bottom: 2rem;
}

a { text-decoration: none; color: inherit; transition: color 0.2s; }
a:hover { color: var(--primary); }

button { font-family: inherit; border: none; background: none; cursor: pointer; }

/* --- Utilitários de Layout --- */
.container {
    width: 100%;
    padding-left: 1rem;
    padding-right: 1rem;
    margin-left: auto;
    margin-right: auto;
}
.max-w-4xl { max-width: 56rem; } /* 896px */

.section { padding-top: 3rem; padding-bottom: 3rem; }
.pt-hero { padding-top: 8rem; padding-bottom: 4rem; }

/* Cores Utilitárias */
.bg-primary { background-color: var(--primary); color: var(--primary-fg); }
.bg-muted { background-color: var(--muted); }

.text-muted { color: var(--muted-fg); }
.text-secondary { color: var(--secondary); }
.text-accent { color: var(--accent); }
.text-primary { color: var(--primary); }
.text-primary-fg { color: var(--primary-fg); }

.text-sm { font-size: 0.875rem; }
.text-lg { font-size: 1.125rem; }
.font-medium { font-weight: 500; }
.font-bold { font-weight: 700; }

/* Flexbox & Grid */
.flex-col { display: flex; flex-direction: column; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-1 { flex: 1; }
.flex-wrap { flex-wrap: wrap; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }
.mr-2 { margin-right: 0.5rem; }

.grid { display: grid; gap: 1rem; }
.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1rem; }

/* --- Header --- */
.header {
    position: fixed; top: 0; left: 0; right: 0; z-index: 50;
    height: 4.5rem;
    /* Fundo escuro com transparência e blur */
    background: rgba(2, 6, 23, 0.85); 
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
}
.header-content {
    height: 100%; display: flex; align-items: center; justify-content: space-between;
}

.logo-wrapper { display: flex; align-items: center; gap: 0.75rem; }
.logo-icon {
    height: 2.25rem; width: 2.25rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary)); 
    color: var(--primary-fg);
    border-radius: 0.5rem;
    display: flex; align-items: center; justify-content: center;
}
.logo-icon svg { width: 1.25rem; height: 1.25rem; }
.logo-text { font-family: var(--font-mono); font-weight: 600; font-size: 0.95rem; color: var(--foreground); }

/* Language Menu */
.lang-menu { display: flex; gap: 0.5rem; }
.lang-menu a { font-size: 1.25rem; opacity: 0.7; transition: opacity 0.2s, transform 0.2s; }
.lang-menu a:hover { opacity: 1; transform: scale(1.1); }

/* --- Hero Section --- */
.badge {
    display: inline-block;
    padding: 0.375rem 1rem;
    background: rgba(56, 189, 248, 0.1); /* Primary transparente */
    border: 1px solid rgba(56, 189, 248, 0.2);
    color: var(--primary);
    border-radius: 9999px;
    font-size: 0.875rem; font-weight: 500;
    margin-bottom: 1.5rem;
}

h1 {
    font-size: 2.5rem;
    line-height: 1.1;
    font-weight: 800;
    margin-bottom: 1.5rem;
    /* Gradiente no texto para dar um toque moderno */
    background: linear-gradient(to right, #fff, #94a3b8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
@media (min-width: 768px) { h1 { font-size: 3.75rem; } }

.lead {
    font-size: 1.25rem;
    color: var(--muted-fg);
    max-width: 42rem;
    margin-bottom: 2rem;
}

.profile-pic-container {
    display: flex;
    justify-content: flex-start; /* Alinha com o texto */
    margin-bottom: 2rem;
}
.profile-pic {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--primary);
  box-shadow: 0 0 20px rgba(56, 189, 248, 0.2);
}

/* --- Buttons --- */
.actions { display: flex; flex-direction: column; gap: 0.75rem; }
@media (min-width: 640px) { .actions { flex-direction: row; } }

.btn {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.2s;
}

.btn-primary { 
    background: var(--primary); 
    color: var(--primary-fg); 
    box-shadow: 0 4px 14px 0 rgba(56, 189, 248, 0.39);
}
.btn-primary:hover { 
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(56, 189, 248, 0.23);
    opacity: 0.95;
    color: var(--primary-fg);
}

.btn-secondary {
    background: var(--card-bg);
    border: 1px solid var(--border);
    color: var(--foreground);
}
.btn-secondary:hover {
    border-color: var(--secondary);
    color: var(--secondary);
}

.btn-outline { 
    border: 1px solid var(--border); 
    color: var(--foreground); 
    background: transparent;
}
.btn-outline:hover { 
    border-color: var(--foreground);
    background: rgba(255,255,255,0.05);
    color: #fff;
}

/* --- Cards --- */
.card {
    background: var(--card-bg); /* Azul Navy */
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    color: var(--card-fg);
    transition: transform 0.2s, box-shadow 0.2s;
}

.p-4 { padding: 1rem; }
.p-5 { padding: 1.25rem; }
.p-6 { padding: 1.5rem; }
.p-8 { padding: 2rem; }

.hover-shadow:hover { 
    box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
    transform: translateY(-2px);
    border-color: var(--primary); /* Borda brilha ao passar o mouse */
}

/* Bordas Coloridas Laterais */
.border-l-secondary { border-left: 4px solid var(--secondary); }
.border-l-accent { border-left: 4px solid var(--accent); }
.border-l-primary { border-left: 4px solid var(--primary); }

.hover-border-secondary { transition: border-color 0.2s; border: 1px solid var(--border); }
.hover-border-secondary:hover { border-color: var(--secondary); }

/* --- Card Internals --- */
.card-flex { display: flex; align-items: flex-start; gap: 1rem; padding: 1.5rem; }
.card-flex-center { display: flex; align-items: center; gap: 0.75rem; }

.icon-box, .icon-box-sm {
    border-radius: 0.5rem;
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
}
.icon-box { width: 3rem; height: 3rem; }
.icon-box-sm { width: 2.5rem; height: 2.5rem; }

/* Backgrounds translúcidos para ícones (Fica bom no Dark Mode) */
.bg-secondary-light { background: rgba(125, 211, 252, 0.15); color: var(--secondary); }
.bg-accent-light { background: rgba(148, 163, 184, 0.15); color: var(--accent); }
.bg-primary-light { background: rgba(56, 189, 248, 0.15); color: var(--primary); }

.education-header {
    display: flex; justify-content: space-between; align-items: center; margin-bottom: 0.25rem;
}
.badge-sm {
    font-size: 0.75rem;
    padding: 0.125rem 0.5rem;
    border-radius: 999px;
    background: rgba(56, 189, 248, 0.1);
    color: var(--primary);
    border: 1px solid rgba(56, 189, 248, 0.2);
}

/* --- Stack Tags --- */
.tags, .tags-accent, .tags-primary { display: flex; flex-wrap: wrap; gap: 0.5rem; }

.tags span, .tags-accent span, .tags-primary span {
    padding: 0.375rem 0.75rem;
    border-radius: 0.375rem;
    font-size: 0.85rem;
    font-weight: 500;
    border: 1px solid transparent;
}

/* Estilização das tags para Dark Mode */
.tags span { 
    background: rgba(2, 6, 23, 0.3); /* Fundo mais escuro que o card */
    color: var(--secondary); 
    border-color: rgba(125, 211, 252, 0.2);
}
.tags-accent span { 
    background: rgba(2, 6, 23, 0.3);
    color: var(--accent);
    border-color: rgba(148, 163, 184, 0.2);
}
.tags-primary span { 
    background: rgba(2, 6, 23, 0.3);
    color: var(--primary);
    border-color: rgba(56, 189, 248, 0.2);
}

/* --- Learning Dots --- */
.dot { width: 0.5rem; height: 0.5rem; border-radius: 9999px; }
.bg-secondary { background-color: var(--secondary); }

/* --- Testimonials --- */
.testimonial-header {
    display: flex; flex-wrap: wrap; justify-content: space-between; align-items: flex-start; gap: 1rem;
}
.stars { display: flex; gap: 2px; color: #FBBF24; /* Amarelo Gold */ }
.stars svg { width: 1rem; height: 1rem; }
.fill-current { fill: currentColor; }

/* --- Philosophy --- */
.border-t { border-top: 1px solid var(--border); }
.pt-2 { padding-top: 0.5rem; }
.pt-4 { padding-top: 1rem; }
.italic { font-style: italic; }

/* --- Contact / Footer --- */
.pb-16 { padding-bottom: 8rem; }
@media (max-width: 640px) {
    .section.pb-16 { padding-bottom: 8rem; } /* Further reduce padding on small phones */
}

/* Seção de contato com destaque */
#contact .card {
    background: linear-gradient(180deg, var(--card-bg) 0%, #06152a 100%);
    border: 1px solid var(--primary);
    box-shadow: 0 0 30px rgba(56, 189, 248, 0.1);
}
#contact h2, #contact p { color: var(--foreground); }

/* --- Bottom Nav (Mobile/Desktop) --- */
.bottom-nav {
    position: fixed; bottom: 1.5rem; left: 1rem; right: 1rem;
    display: flex; justify-content: center; z-index: 50;
    pointer-events: none; /* Permite clicar nas laterais vazias */
}

.nav-container {
    pointer-events: auto;
    background: rgba(10, 35, 66, 0.9); /* Azul Navy Transparente */
    backdrop-filter: blur(16px);
    border: 1px solid rgba(255,255,255,0.1);
    padding: 0.5rem;
    border-radius: 1.25rem;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.2);
    display: flex; gap: 0.25rem;
    overflow-x: auto;
    max-width: 100%;
}

.nav-item {
    display: flex; flex-direction: column; align-items: center; gap: 0.25rem;
    padding: 0.5rem 0.75rem;
    border-radius: 0.75rem;
    color: #94A3B8; /* Slate 400 - inativo */
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    min-width: 4.5rem;
    border: 1px solid transparent;
    text-decoration: none;
}
.nav-item span { font-size: 0.7rem; font-weight: 500; word-break: break-word; text-align: center; }
.nav-item svg { width: 1.25rem; height: 1.25rem; transition: transform 0.2s; }

.nav-item.active {
    background: rgba(56, 189, 248, 0.15); /* Primary muito suave */
    color: var(--primary);
    border-color: rgba(56, 189, 248, 0.2);
    transform: translateY(-2px);
}
.nav-item.active svg { transform: scale(1.1); }

.nav-item:hover:not(.active) {
    color: var(--foreground);
    background: rgba(255,255,255,0.05);
}



/* --- Text Utilities --- */
.text-xs { font-size: 0.75rem; }
.items-start { align-items: flex-start; }

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

.gap-2 { gap: 0.5rem; }
.gap-5 { gap: 1.25rem; }
.gap-6 { gap: 1.5rem; }
.gap-8 { gap: 2rem; }
.gap-1.5 { gap: 0.375rem; }

.mb-3 { margin-bottom: 0.75rem; }
.mb-4 { margin-bottom: 1rem; }
.pt-4 { padding-top: 1rem; }

.border-border { border-color: var(--border); }

/* --- Article Content Styles --- */
.article-content h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-top: 2rem;
    margin-bottom: 1rem;
    color: var(--foreground);
    border-left: 3px solid var(--primary);
    padding-left: 1rem;
}

.article-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
    color: var(--primary);
}

.article-content p {
    margin-bottom: 1rem;
    line-height: 1.8;
}

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

.article-content li {
    margin-bottom: 0.5rem;
}

.article-content code {
    background: var(--muted);
    padding: 0.2rem 0.4rem;
    border-radius: 0.25rem;
    font-size: 0.9em;
    color: var(--primary);
    font-family: var(--font-mono);
}

.article-content pre code {
    padding: 0;
    background: none;
    color: inherit;
}

.code-block {
    background: var(--muted);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem;
    overflow-x: auto;
    margin-bottom: 1.5rem;
}

.code-block code {
    background: none;
    padding: 0;
    color: inherit;
    font-size: 0.875rem;
}

/* --- CTA Box --- */
.cta-box {
    background: linear-gradient(135deg, rgba(56, 189, 248, 0.1), rgba(125, 211, 252, 0.05));
    border: 1px solid rgba(56, 189, 248, 0.2);
    border-radius: var(--radius);
    padding: 2rem;
    text-align: center;
    margin-top: 3rem;
    margin-bottom: 2rem;
}

.cta-box h3 {
    margin-bottom: 1rem;
    margin-top: 0;
    color: var(--foreground);
    font-size: 1.25rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
}

.cta-box p {
    margin-bottom: 1.25rem;
    margin-top: 0;
    color: var(--muted-fg);
    line-height: 1.6;
}

.cta-box .btn {
    margin-top: 0.5rem;
}

/* --- Leading Text --- */
.leading-relaxed {
    line-height: 1.75;
}

/* --- Space Utilities --- */
.space-y-1.5 > * + * { margin-top: 0.375rem; }
.space-y-2 > * + * { margin-top: 0.5rem; }
.space-y-6 > * + * { margin-top: 1.5rem; }

.mb-8 { margin-bottom: 2rem; }

/* --- Hover Effects --- */
.transition-colors {
    transition: color 0.2s ease;
}

/* --- Link Underline Animation --- */
a.text-secondary:hover {
    color: var(--primary);
}

/* --- Flex Utilities --- */
.flex { display: flex; }
.items-center { align-items: center; }

/* --- Better Code Block Styling --- */
.code-block pre {
    line-height: 1.5;
}

.code-block code {
    color: #e2e8f0;
}

/* --- Mobile Improvements --- */
@media (max-width: 640px) {
    .article-card {
        padding: 1.5rem !important;
    }
    
    .article-card h2 {
        font-size: 1.5rem;
    }
    
    .cta-box {
        padding: 1.5rem;
    }
    
    .card.bg-muted {
        padding: 1rem !important;
    }
}

/* --- Articles Grid --- */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.articles-grid a .card {
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
    height: 100%;
}

.articles-grid a:hover .card {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(56, 189, 248, 0.15);
    border-color: var(--primary);
}