/* ==========================================================================
   BlenderBR — Componentes
   ========================================================================== */

/* ---------- Header / Navegação ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  height: var(--header-h);
  display: flex; align-items: center;
  background: color-mix(in srgb, var(--color-bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}
.header-inner { display: flex; align-items: center; gap: var(--sp-6); width: 100%; }
.logo { display: flex; align-items: center; gap: var(--sp-2); font-family: var(--font-display); font-weight: 800; font-size: var(--fs-lg); color: var(--color-text); }
.logo:hover { text-decoration: none; }
.logo-mark { width: 32px; height: 32px; flex-shrink: 0; }
.logo-mark .cube-face { fill: var(--color-primary); }
.logo-mark .cube-face--light { fill: var(--color-primary-dark); opacity: .85; }

.main-nav { display: flex; gap: var(--sp-6); margin-left: var(--sp-6); flex: 1; }
.main-nav a { color: var(--color-text-secondary); font-weight: 600; font-size: var(--fs-sm); }
.main-nav a:hover, .main-nav a[aria-current="page"] { color: var(--color-primary); text-decoration: none; }

.header-actions { display: flex; align-items: center; gap: var(--sp-3); }

.nav-toggle { display: none; }

.search-trigger, .theme-toggle {
  width: 40px; height: 40px; display: grid; place-items: center;
  border-radius: var(--radius-sm); border: 1px solid var(--color-border);
  background: var(--color-card); color: var(--color-text); cursor: pointer;
  transition: border-color var(--transition-fast), transform var(--transition-fast);
}
.search-trigger:hover, .theme-toggle:hover { border-color: var(--color-primary); }
.theme-toggle .icon-moon { display: none; }
[data-theme="dark"] .theme-toggle .icon-sun { display: none; }
[data-theme="dark"] .theme-toggle .icon-moon { display: block; }

/* ---------- Botões ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--sp-2);
  padding: var(--sp-3) var(--sp-6); border-radius: var(--radius-sm);
  font-weight: 700; font-size: var(--fs-sm); cursor: pointer; border: 1px solid transparent;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-dark); box-shadow: var(--shadow-md); }
.btn-outline { background: transparent; border-color: var(--color-border); color: var(--color-text); }
.btn-outline:hover { border-color: var(--color-primary); color: var(--color-primary); }
.btn-sm { padding: var(--sp-2) var(--sp-4); font-size: var(--fs-xs); }

/* ---------- Hero ---------- */
.hero { padding: var(--sp-24) 0 var(--sp-16); position: relative; overflow: hidden; }
.hero::before {
  content: ""; position: absolute; inset: -20% -10% auto -10%; height: 480px;
  background: radial-gradient(60% 60% at 30% 30%, color-mix(in srgb, var(--color-primary) 18%, transparent), transparent 70%);
  z-index: -1;
}
.hero-inner { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: var(--sp-16); align-items: center; }
.eyebrow {
  display: inline-flex; align-items: center; gap: var(--sp-2);
  font-size: var(--fs-xs); font-weight: 700; letter-spacing: .06em; text-transform: uppercase;
  color: var(--color-primary); background: color-mix(in srgb, var(--color-primary) 10%, transparent);
  padding: var(--sp-1) var(--sp-3); border-radius: 999px; margin-bottom: var(--sp-4);
}
.hero h1 { margin-bottom: var(--sp-4); }
.hero .lede { font-size: var(--fs-lg); color: var(--color-text-secondary); max-width: 46ch; margin-bottom: var(--sp-8); }
.hero-actions { display: flex; gap: var(--sp-3); flex-wrap: wrap; }

/* ---------- Busca ---------- */
.search-box { position: relative; }
.search-box input {
  width: 100%; padding: var(--sp-4) var(--sp-4) var(--sp-4) 3rem;
  border-radius: var(--radius-md); border: 1px solid var(--color-border);
  background: var(--color-card); color: var(--color-text); font-size: var(--fs-base);
}
.search-box input:focus { outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 4px color-mix(in srgb, var(--color-primary) 15%, transparent); }
.search-box .search-icon { position: absolute; left: var(--sp-4); top: 50%; transform: translateY(-50%); width: 20px; height: 20px; color: var(--color-text-secondary); }
.search-results {
  position: absolute; top: calc(100% + var(--sp-2)); left: 0; right: 0;
  background: var(--color-card); border: 1px solid var(--color-border); border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg); max-height: 400px; overflow-y: auto; z-index: 50; display: none;
}
.search-results.is-open { display: block; }
.search-results a { display: block; padding: var(--sp-3) var(--sp-4); color: var(--color-text); border-bottom: 1px solid var(--color-border); }
.search-results a:last-child { border-bottom: none; }
.search-results a:hover { background: var(--color-bg-alt); text-decoration: none; }
.search-results .result-cat { display: block; font-size: var(--fs-xs); color: var(--color-primary); font-weight: 700; }
.search-empty { padding: var(--sp-4); color: var(--color-text-secondary); font-size: var(--fs-sm); }

/* Modal de busca (mobile/overlay) */
.search-modal { position: fixed; inset: 0; background: rgba(15,23,42,.5); z-index: 200; display: none; align-items: flex-start; justify-content: center; padding-top: 10vh; }
.search-modal.is-open { display: flex; }
.search-modal-inner { width: min(600px, 92vw); }

/* ---------- Cards ---------- */
.card {
  background: var(--color-card); border: 1px solid var(--color-border); border-radius: var(--radius-lg);
  overflow: hidden; box-shadow: var(--shadow-sm); transition: box-shadow var(--transition-base), transform var(--transition-base);
  display: flex; flex-direction: column; height: 100%;
}
.card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
.card-media { aspect-ratio: 16/9; background: var(--color-bg-alt); display: flex; align-items: center; justify-content: center; color: var(--color-primary); }
.card-body { padding: var(--sp-6); display: flex; flex-direction: column; gap: var(--sp-2); flex: 1; }
.card-cat { font-size: var(--fs-xs); font-weight: 700; text-transform: uppercase; letter-spacing: .04em; color: var(--color-primary); }
.card h3 { font-size: var(--fs-lg); margin-bottom: var(--sp-1); }
.card h3 a { color: var(--color-text); }
.card h3 a::after { content: ""; position: absolute; inset: 0; }
.card { position: relative; }
.card p { color: var(--color-text-secondary); font-size: var(--fs-sm); margin-bottom: 0; }
.card-meta { display: flex; gap: var(--sp-3); font-size: var(--fs-xs); color: var(--color-text-secondary); margin-top: auto; padding-top: var(--sp-3); }

.grid { display: grid; gap: var(--sp-6); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.section { padding: var(--sp-16) 0; }
.section-head { display: flex; align-items: baseline; justify-content: space-between; gap: var(--sp-4); margin-bottom: var(--sp-8); }
.section-head h2 { margin: 0; }
.section-head .see-all { font-weight: 700; font-size: var(--fs-sm); white-space: nowrap; }
.section-alt { background: var(--color-bg-alt); }

/* ---------- Badges / Tags / Níveis ---------- */
.badge { display: inline-flex; align-items: center; gap: var(--sp-1); font-size: var(--fs-xs); font-weight: 700; padding: var(--sp-1) var(--sp-2); border-radius: 999px; }
.badge-iniciante { background: color-mix(in srgb, var(--color-success) 14%, transparent); color: var(--color-success); }
.badge-intermediario { background: color-mix(in srgb, var(--color-warning) 16%, transparent); color: #92600A; }
.badge-avancado { background: color-mix(in srgb, var(--color-error) 12%, transparent); color: var(--color-error); }
.tag { display: inline-block; font-size: var(--fs-xs); color: var(--color-text-secondary); background: var(--color-bg-alt); border: 1px solid var(--color-border); padding: var(--sp-1) var(--sp-3); border-radius: 999px; margin: 0 var(--sp-2) var(--sp-2) 0; }
.tag:hover { border-color: var(--color-primary); color: var(--color-primary); text-decoration: none; }

/* ---------- Categorias (grid de ícones) ---------- */
.category-card { display: flex; flex-direction: column; align-items: flex-start; gap: var(--sp-3); padding: var(--sp-6); background: var(--color-card); border: 1px solid var(--color-border); border-radius: var(--radius-lg); transition: border-color var(--transition-base), transform var(--transition-base); }
.category-card:hover { border-color: var(--color-primary); transform: translateY(-3px); text-decoration: none; }
.category-card .cat-icon { width: 44px; height: 44px; border-radius: var(--radius-sm); background: color-mix(in srgb, var(--color-primary) 10%, transparent); display: grid; place-items: center; color: var(--color-primary); }
.category-card h3 { margin: 0; color: var(--color-text); font-size: var(--fs-base); }
.category-card .cat-count { font-size: var(--fs-xs); color: var(--color-text-secondary); }

/* ---------- Artigo ---------- */
.breadcrumb { font-size: var(--fs-xs); color: var(--color-text-secondary); display: flex; gap: var(--sp-2); flex-wrap: wrap; margin-bottom: var(--sp-6); }
.breadcrumb a { color: var(--color-text-secondary); }
.breadcrumb a:hover { color: var(--color-primary); }
.breadcrumb [aria-current] { color: var(--color-text); font-weight: 600; }

.article-header { max-width: 760px; margin: 0 auto var(--sp-8); }
.article-meta { display: flex; align-items: center; gap: var(--sp-4); font-size: var(--fs-sm); color: var(--color-text-secondary); flex-wrap: wrap; margin-top: var(--sp-4); }
.article-meta .author { display: flex; align-items: center; gap: var(--sp-2); }
.article-meta .avatar { width: 28px; height: 28px; border-radius: 50%; background: var(--color-primary); color: #fff; display: grid; place-items: center; font-size: var(--fs-xs); font-weight: 700; }

.article-layout { display: grid; grid-template-columns: 1fr 260px; gap: var(--sp-12); max-width: var(--container-max); margin: 0 auto; align-items: start; }
.article-body { max-width: 760px; }
.article-body h2 { margin-top: var(--sp-12); scroll-margin-top: calc(var(--header-h) + var(--sp-4)); }
.article-body h3 { margin-top: var(--sp-8); scroll-margin-top: calc(var(--header-h) + var(--sp-4)); }
.article-body img { border-radius: var(--radius-md); margin: var(--sp-6) 0; }
.article-body ul, .article-body ol { padding-left: 1.3em; }
.article-body li { margin-bottom: var(--sp-2); }

.toc { position: sticky; top: calc(var(--header-h) + var(--sp-6)); background: var(--color-card); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: var(--sp-4); }
.toc h4 { font-size: var(--fs-sm); text-transform: uppercase; letter-spacing: .04em; color: var(--color-text-secondary); margin-bottom: var(--sp-3); }
.toc ol { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: var(--sp-2); font-size: var(--fs-sm); }
.toc a { color: var(--color-text-secondary); display: block; }
.toc a:hover, .toc a.is-active { color: var(--color-primary); text-decoration: none; }
.toc .toc-sub { padding-left: var(--sp-4); margin-top: var(--sp-2); display: flex; flex-direction: column; gap: var(--sp-2); }

.reading-progress { position: fixed; top: 0; left: 0; height: 3px; background: var(--color-primary); z-index: 200; width: 0%; transition: width 100ms linear; }

.callout { border-radius: var(--radius-md); padding: var(--sp-4) var(--sp-6); margin: var(--sp-6) 0; border-left: 4px solid; }
.callout-tip { background: color-mix(in srgb, var(--color-success) 8%, transparent); border-color: var(--color-success); }
.callout-warning { background: color-mix(in srgb, var(--color-warning) 10%, transparent); border-color: var(--color-warning); }
.callout-title { font-weight: 800; margin-bottom: var(--sp-1); display: flex; align-items: center; gap: var(--sp-2); }

.share-row { display: flex; gap: var(--sp-2); align-items: center; margin: var(--sp-8) 0; }
.share-btn { width: 38px; height: 38px; border-radius: 50%; border: 1px solid var(--color-border); display: grid; place-items: center; color: var(--color-text-secondary); }
.share-btn:hover { border-color: var(--color-primary); color: var(--color-primary); }

.faq-item { border-bottom: 1px solid var(--color-border); padding: var(--sp-4) 0; }
.faq-item summary { cursor: pointer; font-weight: 700; list-style: none; display: flex; justify-content: space-between; align-items: center; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; font-size: 1.4em; color: var(--color-primary); }
.faq-item[open] summary::after { content: "–"; }
.faq-item p { margin-top: var(--sp-3); color: var(--color-text-secondary); }

.back-to-top { position: fixed; bottom: var(--sp-6); right: var(--sp-6); width: 44px; height: 44px; border-radius: 50%; background: var(--color-primary); color: #fff; display: grid; place-items: center; box-shadow: var(--shadow-md); opacity: 0; pointer-events: none; transition: opacity var(--transition-base), transform var(--transition-fast); z-index: 90; border: none; cursor: pointer; }
.back-to-top.is-visible { opacity: 1; pointer-events: auto; }
.back-to-top:hover { transform: translateY(-2px); }

/* ---------- Filtros ---------- */
.filter-bar { display: flex; flex-wrap: wrap; gap: var(--sp-3); margin-bottom: var(--sp-8); align-items: center; }
.filter-bar select, .filter-bar input[type="search"] {
  padding: var(--sp-2) var(--sp-3); border-radius: var(--radius-sm); border: 1px solid var(--color-border);
  background: var(--color-card); color: var(--color-text); font-size: var(--fs-sm);
}
.chip-group { display: flex; gap: var(--sp-2); flex-wrap: wrap; }
.chip { padding: var(--sp-2) var(--sp-4); border-radius: 999px; border: 1px solid var(--color-border); background: var(--color-card); color: var(--color-text-secondary); font-size: var(--fs-sm); font-weight: 600; cursor: pointer; }
.chip.is-active, .chip:hover { border-color: var(--color-primary); color: var(--color-primary); }

/* ---------- Ferramentas ---------- */
.tool-card { background: var(--color-card); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--sp-8); }
.tool-form { display: grid; gap: var(--sp-4); max-width: 480px; }
.field { display: flex; flex-direction: column; gap: var(--sp-2); }
.field label { font-size: var(--fs-sm); font-weight: 700; }
.field input, .field select {
  padding: var(--sp-3); border-radius: var(--radius-sm); border: 1px solid var(--color-border);
  background: var(--color-bg); color: var(--color-text); font-size: var(--fs-base); font-family: var(--font-body);
}
.field input:focus, .field select:focus { outline: none; border-color: var(--color-primary); }
.tool-result { margin-top: var(--sp-6); padding: var(--sp-6); border-radius: var(--radius-md); background: var(--color-bg-alt); font-family: var(--font-mono); }
.tool-result .result-value { font-size: var(--fs-2xl); font-weight: 800; color: var(--color-primary); }
.tool-result .result-label { font-size: var(--fs-xs); color: var(--color-text-secondary); text-transform: uppercase; letter-spacing: .04em; }

/* ---------- Newsletter / FAQ home ---------- */
.newsletter-box { background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark)); border-radius: var(--radius-lg); padding: var(--sp-12); color: #fff; display: flex; align-items: center; justify-content: space-between; gap: var(--sp-8); flex-wrap: wrap; }
.newsletter-box h2 { color: #fff; margin-bottom: var(--sp-2); }
.newsletter-box p { color: rgba(255,255,255,.85); margin-bottom: 0; }
.newsletter-form { display: flex; gap: var(--sp-2); flex-wrap: wrap; }
.newsletter-form input { padding: var(--sp-3) var(--sp-4); border-radius: var(--radius-sm); border: none; min-width: 240px; }
.newsletter-form .btn-primary { background: var(--color-text); }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--color-border); padding: var(--sp-16) 0 var(--sp-8); background: var(--color-bg-alt); }
.footer-grid { display: grid; grid-template-columns: 1.4fr repeat(4, 1fr); gap: var(--sp-8); }
.footer-col h4 { font-size: var(--fs-sm); text-transform: uppercase; letter-spacing: .04em; color: var(--color-text-secondary); margin-bottom: var(--sp-4); }
.footer-col ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: var(--sp-2); }
.footer-col a { color: var(--color-text); font-size: var(--fs-sm); }
.footer-col a:hover { color: var(--color-primary); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; margin-top: var(--sp-12); padding-top: var(--sp-6); border-top: 1px solid var(--color-border); font-size: var(--fs-xs); color: var(--color-text-secondary); flex-wrap: wrap; gap: var(--sp-3); }
.footer-socials { display: flex; gap: var(--sp-3); }
.footer-socials a { width: 34px; height: 34px; border-radius: 50%; border: 1px solid var(--color-border); display: grid; place-items: center; color: var(--color-text-secondary); }
.footer-socials a:hover { border-color: var(--color-primary); color: var(--color-primary); }

/* ---------- Glossário ---------- */
.glossary-alpha-nav { display: flex; flex-wrap: wrap; gap: var(--sp-2); margin-bottom: var(--sp-8); position: sticky; top: calc(var(--header-h) + 1px); background: var(--color-bg); padding: var(--sp-3) 0; z-index: 10; }
.glossary-alpha-nav a { width: 32px; height: 32px; display: grid; place-items: center; border-radius: var(--radius-sm); font-weight: 700; font-size: var(--fs-sm); color: var(--color-text-secondary); }
.glossary-alpha-nav a:hover { background: var(--color-primary); color: #fff; text-decoration: none; }
.glossary-letter-group h2 { border-bottom: 2px solid var(--color-primary); padding-bottom: var(--sp-2); display: inline-block; }
.glossary-term { padding: var(--sp-4) 0; border-bottom: 1px solid var(--color-border); }
.glossary-term dt { font-weight: 800; font-family: var(--font-display); }
.glossary-term dd { margin: var(--sp-1) 0 0; color: var(--color-text-secondary); }

/* ---------- Utilitários ---------- */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.flow > * + * { margin-top: var(--sp-4); }
.eyebrow-line { color: var(--color-text-secondary); font-size: var(--fs-sm); font-weight: 700; }

/* ---------- Responsivo ---------- */
@media (max-width: 960px) {
  .hero-inner { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .article-layout { grid-template-columns: 1fr; }
  .toc { position: static; margin-bottom: var(--sp-8); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 720px) {
  .main-nav { position: fixed; top: var(--header-h); left: 0; right: 0; bottom: 0; background: var(--color-bg); flex-direction: column; padding: var(--sp-6); gap: var(--sp-2); transform: translateX(100%); transition: transform var(--transition-base); overflow-y: auto; }
  .main-nav.is-open { transform: translateX(0); }
  .main-nav a { padding: var(--sp-3) 0; border-bottom: 1px solid var(--color-border); font-size: var(--fs-base); }
  .nav-toggle { display: grid; place-items: center; width: 40px; height: 40px; border-radius: var(--radius-sm); border: 1px solid var(--color-border); background: var(--color-card); }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  h1 { font-size: var(--fs-3xl); }
  .newsletter-box { flex-direction: column; align-items: flex-start; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}