/* ============================================================
   NexusB2B — Public Stylesheet
   Design System: Enterprise Event Architecture
   ============================================================ */

/* ── CSS Custom Properties (Theme Defaults) ─────────────── */
:root {
    --color-primary: #091426;
    --color-secondary: #0051D5;
    --color-accent: #F56017;
    --color-background: #F8FAFC;
    --color-text: #0F172A;
    --color-text-muted: #64748B;
    --color-button-bg: #EA580C;
    --color-button-text: #FFFFFF;
    --color-link: #2563EB;
    --color-link-hover: #1D4ED8;
    --color-header-bg: #091426;
    --color-footer-bg: #0F172A;

    --color-surface: #FFFFFF;
    --color-surface-alt: #F1F5F9;
    --color-border: #E2E8F0;
    --color-border-hover: #CBD5E1;

    --color-success: #10B981;
    --color-warning: #F59E0B;
    --color-danger: #EF4444;

    --radius-sm: 0.25rem;
    --radius: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;

    --shadow-1: 0 1px 3px 0 rgba(15,23,42,0.05), 0 1px 2px -1px rgba(15,23,42,0.05);
    --shadow-2: 0 10px 15px -3px rgba(15,23,42,0.08), 0 4px 6px -4px rgba(15,23,42,0.03);
    --shadow-3: 0 20px 25px -5px rgba(15,23,42,0.12), 0 8px 10px -6px rgba(15,23,42,0.04);

    --container-max: 1240px;
    --gutter: 1.5rem;
}

/* ── Reset & Base ────────────────────────────────────────── */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 16px;
    line-height: 1.5;
    color: var(--color-text);
    background: var(--color-background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

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

a:hover {
    color: var(--color-link-hover);
}

/* ── Container ───────────────────────────────────────────── */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--gutter);
}

/* ── Typography ──────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.25;
    letter-spacing: -0.015em;
    color: var(--color-text);
}

h1 { font-size: 3rem; font-weight: 700; letter-spacing: -0.025em; }
h2 { font-size: 2.25rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

.text-center { text-align: center; }
.text-muted { color: var(--color-text-muted); }

/* ── Buttons ─────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 600;
    line-height: 1.5;
    border: 1px solid transparent;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background: var(--color-button-bg);
    color: var(--color-button-text);
    border-color: var(--color-button-bg);
}

.btn-primary:hover {
    background: #C2410C;
    border-color: #C2410C;
    color: var(--color-button-text);
    box-shadow: var(--shadow-2);
}

.btn-secondary {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

.btn-secondary:hover {
    background: #1E293B;
    border-color: #1E293B;
    color: #fff;
}

.btn-outline {
    background: transparent;
    color: var(--color-text);
    border-color: var(--color-border-hover);
}

.btn-outline:hover {
    background: var(--color-surface-alt);
    color: var(--color-text);
}

.btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    border-radius: var(--radius-lg);
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.8125rem;
}

/* ── Header ──────────────────────────────────────────────── */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(226, 232, 240, 0.8);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 4rem;
    gap: 1.5rem;
}

.header-logo {
    text-decoration: none;
    flex-shrink: 0;
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 400;
    color: var(--color-text);
    letter-spacing: -0.02em;
}

.logo-text strong {
    font-weight: 700;
}

.header-nav {
    flex: 1;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    list-style: none;
}

.nav-list a {
    display: block;
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-muted);
    border-radius: var(--radius);
    transition: all 0.2s;
}

.nav-list a:hover {
    color: var(--color-text);
    background: var(--color-surface-alt);
}

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

.lang-switcher {
    display: flex;
    gap: 0.25rem;
    padding: 0.125rem;
    background: var(--color-surface-alt);
    border-radius: var(--radius-full);
}

.lang-btn {
    padding: 0.25rem 0.625rem;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-muted);
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: all 0.2s;
}

.lang-btn.active {
    background: var(--color-surface);
    color: var(--color-text);
    box-shadow: var(--shadow-1);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    padding: 0.5rem;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-menu-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--color-text);
    transition: all 0.3s;
}

/* ── Hero Section ────────────────────────────────────────── */
.hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, #1E293B 100%);
    padding: 5rem 0;
    color: #fff;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.hero-badge {
    display: inline-block;
    padding: 0.375rem 1rem;
    background: rgba(245, 96, 23, 0.15);
    color: #FDBA74;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    border-radius: var(--radius-full);
    border: 1px solid rgba(245, 96, 23, 0.3);
    margin-bottom: 1.5rem;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.025em;
    color: #fff;
    margin-bottom: 1.25rem;
}

.hero-subtitle {
    font-size: 1.125rem;
    line-height: 1.7;
    color: #94A3B8;
    margin-bottom: 2rem;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* ── Sections ────────────────────────────────────────────── */
.section {
    padding: 5rem 0;
}

.section-light {
    background: var(--color-surface);
}

.section-alt {
    background: var(--color-surface-alt);
}

/* ── Footer ──────────────────────────────────────────────── */
.site-footer {
    background: var(--color-footer-bg);
    color: #94A3B8;
    padding: 4rem 0 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.site-footer .logo-text {
    color: #fff;
    font-size: 1.25rem;
}

.footer-desc {
    margin-top: 0.75rem;
    font-size: 0.875rem;
    line-height: 1.6;
}

.site-footer h4 {
    color: #fff;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
}

.site-footer ul {
    list-style: none;
}

.site-footer ul li {
    margin-bottom: 0.5rem;
}

.site-footer ul a {
    color: #94A3B8;
    font-size: 0.875rem;
    transition: color 0.2s;
}

.site-footer ul a:hover {
    color: #fff;
}

.site-footer p {
    font-size: 0.875rem;
}

.footer-bottom {
    border-top: 1px solid rgba(148, 163, 184, 0.15);
    padding-top: 1.5rem;
    text-align: center;
    font-size: 0.8125rem;
}

/* ── Badges ──────────────────────────────────────────────── */
.badge {
    display: inline-block;
    padding: 0.25rem 0.625rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.badge-success {
    background: #ECFDF5;
    color: #065F46;
    border: 1px solid #A7F3D0;
}

.badge-warning {
    background: #FFFBEB;
    color: #92400E;
    border: 1px solid #FDE68A;
}

.badge-danger {
    background: #FEF2F2;
    color: #991B1B;
    border: 1px solid #FECACA;
}

.locale-badge {
    display: inline-block;
    padding: 0.125rem 0.5rem;
    font-size: 0.6875rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.locale-pt {
    background: #ECFDF5;
    color: #065F46;
    border: 1px solid #A7F3D0;
}

.locale-en {
    background: #EFF6FF;
    color: #1E40AF;
    border: 1px solid #BFDBFE;
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 1023px) {
    .header-nav {
        display: none;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .hero-title {
        font-size: 2.25rem;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 2rem;
    }
}

@media (max-width: 639px) {
    :root {
        --gutter: 1rem;
    }

    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }

    .hero {
        padding: 3rem 0;
    }

    .hero-title {
        font-size: 1.75rem;
    }

    .hero-actions {
        flex-direction: column;
        align-items: center;
    }

    .footer-grid {
        grid-template-columns: 1fr;
    }

    .section {
        padding: 3rem 0;
    }
}

/* ============================================================
   Blog — Público
   ============================================================ */

.container-narrow { max-width: 760px; margin: 0 auto; padding: 0 var(--gutter); }

/* Fallback Banner */
.fallback-banner {
    background: #FFF7ED; color: #92400E; padding: 0.625rem 0;
    font-size: 0.875rem; text-align: center; border-bottom: 1px solid #FDE68A;
}

/* Blog Hero */
.blog-hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, #1E293B 100%);
    padding: 4rem 0; text-align: center; color: #fff;
}
.blog-hero h1 { font-size: 2.5rem; font-weight: 700; color: #fff; margin-bottom: 0.5rem; }
.blog-hero p { color: #94A3B8; font-size: 1.0625rem; max-width: 600px; margin: 0 auto; }

/* Blog Filters */
.blog-filters {
    display: flex; gap: 0.5rem; flex-wrap: wrap; margin-bottom: 2rem;
    justify-content: center;
}
.filter-btn {
    padding: 0.375rem 1rem; font-size: 0.8125rem; font-weight: 600;
    border: 1px solid var(--color-border); border-radius: var(--radius-full);
    color: var(--color-text-muted); text-decoration: none; transition: all 0.15s;
}
.filter-btn:hover, .filter-btn.active {
    background: var(--color-primary); color: #fff; border-color: var(--color-primary);
}

/* Blog Grid */
.blog-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 1.5rem;
}
.blog-card {
    background: var(--color-surface); border: 1px solid var(--color-border);
    border-radius: var(--radius-lg); overflow: hidden;
    transition: box-shadow 0.2s, transform 0.2s;
}
.blog-card:hover {
    box-shadow: var(--shadow-2); transform: translateY(-2px);
}
.blog-card-image { display: block; aspect-ratio: 16/9; overflow: hidden; }
.blog-card-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.3s; }
.blog-card:hover .blog-card-image img { transform: scale(1.03); }
.blog-card-body { padding: 1.25rem; }
.blog-card-category {
    display: inline-block; font-size: 0.75rem; font-weight: 600;
    color: var(--color-secondary); text-transform: uppercase; letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}
.blog-card-title { font-size: 1.125rem; font-weight: 600; line-height: 1.35; margin-bottom: 0.5rem; }
.blog-card-title a { color: var(--color-text); text-decoration: none; }
.blog-card-title a:hover { color: var(--color-secondary); }
.blog-card-excerpt { font-size: 0.9375rem; color: var(--color-text-muted); line-height: 1.6; margin-bottom: 0.75rem; }
.blog-card-meta { font-size: 0.8125rem; color: var(--color-text-muted); }
.blog-empty { text-align: center; padding: 4rem 0; color: var(--color-text-muted); }

/* Blog Pagination */
.blog-pagination { display: flex; justify-content: center; gap: 0.375rem; margin-top: 3rem; }
.page-btn {
    display: inline-flex; align-items: center; justify-content: center;
    width: 40px; height: 40px; border: 1px solid var(--color-border);
    border-radius: var(--radius); font-size: 0.875rem; font-weight: 600;
    color: var(--color-text-muted); text-decoration: none; transition: all 0.15s;
}
.page-btn:hover, .page-btn.active {
    background: var(--color-primary); color: #fff; border-color: var(--color-primary);
}

/* Blog Article */
.blog-article-header {
    padding: 4rem 0 2rem; background: var(--color-surface-alt); text-align: center;
}
.blog-article-category {
    display: inline-block; font-size: 0.75rem; font-weight: 600;
    color: var(--color-secondary); text-transform: uppercase; letter-spacing: 0.05em;
    margin-bottom: 0.75rem; text-decoration: none;
}
.blog-article-header h1 {
    font-size: 2.5rem; font-weight: 700; line-height: 1.2; max-width: 700px; margin: 0 auto 1rem;
}
.blog-article-meta { font-size: 0.875rem; color: var(--color-text-muted); }
.blog-article-cover { margin: 2rem 0; }
.blog-article-cover img {
    width: 100%; max-height: 480px; object-fit: cover; border-radius: var(--radius-lg);
}
.blog-article-body { padding: 2rem 0 3rem; }

/* Prose (blog content) */
.prose { font-size: 1.0625rem; line-height: 1.8; color: #334155; }
.prose h2 { font-size: 1.5rem; margin: 2rem 0 0.75rem; }
.prose h3 { font-size: 1.25rem; margin: 1.5rem 0 0.5rem; }
.prose p { margin-bottom: 1.25rem; }
.prose a { color: var(--color-link); text-decoration: underline; }
.prose img { max-width: 100%; border-radius: var(--radius); margin: 1.5rem 0; }
.prose ul, .prose ol { margin: 1rem 0 1.25rem 1.5rem; }
.prose li { margin-bottom: 0.375rem; }
.prose blockquote {
    border-left: 4px solid var(--color-secondary); padding: 1rem 1.25rem;
    background: var(--color-surface-alt); margin: 1.5rem 0; font-style: italic; color: #475569;
}
.prose pre { background: #0F172A; color: #E2E8F0; padding: 1.25rem; border-radius: var(--radius); overflow-x: auto; margin: 1.5rem 0; }
.prose code { font-size: 0.9375rem; }
.prose table { width: 100%; border-collapse: collapse; margin: 1.5rem 0; }
.prose th, .prose td { padding: 0.625rem; border: 1px solid var(--color-border); text-align: left; }
.prose th { background: var(--color-surface-alt); font-weight: 600; }

.blog-article-tags { margin-top: 2rem; display: flex; gap: 0.5rem; flex-wrap: wrap; }
.tag-pill {
    display: inline-block; padding: 0.25rem 0.75rem; background: var(--color-surface-alt);
    color: var(--color-text-muted); font-size: 0.8125rem; font-weight: 500;
    border-radius: var(--radius-full); border: 1px solid var(--color-border);
}
.blog-back { padding: 0 0 4rem; }

@media (max-width: 639px) {
    .blog-hero h1 { font-size: 1.75rem; }
    .blog-grid { grid-template-columns: 1fr; }
    .blog-article-header h1 { font-size: 1.75rem; }
}