/*
 Theme Name:   Hello DW Child
 Theme URI:    https://seusite.com.br/
 Description:  Tema filho de Hello DW — otimizado para SEO, performance e responsividade.
 Author:       Seu Nome
 Author URI:   https://seusite.com.br/
 Template:     hello-dw
 Version:      1.0.0
 License:      GNU General Public License v2 or later
 License URI:  http://www.gnu.org/licenses/gpl-2.0.html
 Text Domain:  hello-dw-child

 CHANGELOG:
 v1.0.0 - Criação do tema filho com melhorias de SEO, performance e responsividade.
          ✔ Design system com variáveis CSS (mobile-first)
          ✔ Dark mode nativo (prefers-color-scheme)
          ✔ Suporte a reduced-motion e print
          ✔ Acessibilidade: skip-link, focus-visible, sr-only
          ✔ Cards modernos com hover suave
          ✔ Paginação, sidebar e footer responsivos
*/

/* =====================================================================
   VARIÁVEIS CSS — Design System Mobile-First
   ===================================================================== */
:root {
  --color-primary:     #1a73e8;
  --color-primary-dk:  #1558b0;
  --color-secondary:   #34a853;
  --color-accent:      #fbbc04;
  --color-text:        #202124;
  --color-text-muted:  #5f6368;
  --color-bg:          #ffffff;
  --color-bg-alt:      #f8f9fa;
  --color-border:      #dadce0;

  --font-base:    'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-heading: var(--font-base);
  --font-mono:    'JetBrains Mono', Consolas, monospace;

  --font-size-xs:  clamp(0.75rem,  1.5vw, 0.875rem);
  --font-size-sm:  clamp(0.875rem, 2vw,   1rem);
  --font-size-md:  clamp(1rem,     2.5vw, 1.125rem);
  --font-size-lg:  clamp(1.25rem,  3vw,   1.5rem);
  --font-size-xl:  clamp(1.5rem,   4vw,   2rem);
  --font-size-2xl: clamp(2rem,     5vw,   3rem);
  --line-height: 1.7;

  --space-xs:  0.25rem;
  --space-sm:  0.5rem;
  --space-md:  1rem;
  --space-lg:  1.5rem;
  --space-xl:  2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  --container-max: 1200px;
  --container-pad: clamp(1rem, 5vw, 2rem);

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.08);
  --shadow-md: 0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.06);
  --shadow-lg: 0 10px 25px rgba(0,0,0,.1), 0 6px 10px rgba(0,0,0,.08);
  --transition: 200ms ease;
}

/* =====================================================================
   RESET & BASE
   ===================================================================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  font-family: var(--font-base);
  font-size: var(--font-size-md);
  line-height: var(--line-height);
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Skip link — acessibilidade */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-md);
  z-index: 10000;
  padding: var(--space-sm) var(--space-lg);
  background: var(--color-primary);
  color: #fff;
  font-weight: 600;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  text-decoration: none;
  transition: top var(--transition);
}
.skip-link:focus { top: 0; outline: 3px solid var(--color-accent); }

/* =====================================================================
   TIPOGRAFIA
   ===================================================================== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-text);
  margin-bottom: var(--space-md);
  text-wrap: balance;
}
h1 { font-size: var(--font-size-2xl); }
h2 { font-size: var(--font-size-xl); }
h3 { font-size: var(--font-size-lg); }
h4, h5, h6 { font-size: var(--font-size-md); }

p { margin-bottom: var(--space-md); max-width: 70ch; }
p:last-child { margin-bottom: 0; }

a {
  color: var(--color-primary);
  text-underline-offset: 3px;
  transition: color var(--transition);
}
a:hover { color: var(--color-primary-dk); }
a:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

blockquote {
  border-left: 4px solid var(--color-primary);
  padding: var(--space-md) var(--space-lg);
  background: var(--color-bg-alt);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: var(--space-xl) 0;
  font-style: italic;
}

code {
  font-family: var(--font-mono);
  font-size: .875em;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: .1em .4em;
}
pre {
  background: #1e1e1e;
  color: #d4d4d4;
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin-bottom: var(--space-xl);
}
pre code { background: none; border: none; padding: 0; }

/* =====================================================================
   LAYOUT
   ===================================================================== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-pad);
  padding-right: var(--container-pad);
}

.content-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-xl);
}
@media (min-width: 768px) {
  .content-grid { grid-template-columns: 1fr 300px; }
}

/* =====================================================================
   HEADER
   ===================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  gap: var(--space-lg);
}

.site-logo img { max-height: 48px; width: auto; }
.site-title { font-size: var(--font-size-lg); font-weight: 800; margin-bottom: 0; }
.site-title a { text-decoration: none; color: var(--color-text); }
.site-description { font-size: var(--font-size-xs); color: var(--color-text-muted); }

/* =====================================================================
   NAVEGAÇÃO
   ===================================================================== */
.main-navigation ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}
.main-navigation a {
  display: block;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 500;
  text-decoration: none;
  color: var(--color-text-muted);
  transition: background var(--transition), color var(--transition);
}
.main-navigation a:hover,
.main-navigation .current-menu-item > a {
  background: var(--color-bg-alt);
  color: var(--color-text);
}

/* Dropdown */
.main-navigation li { position: relative; }
.main-navigation ul ul {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 220px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: var(--space-xs);
  opacity: 0;
  visibility: hidden;
  transform: translateY(4px);
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
  z-index: 100;
  flex-direction: column;
}
.main-navigation li:hover > ul,
.main-navigation li:focus-within > ul {
  opacity: 1;
  visibility: visible;
  transform: none;
}

/* Hambúrguer mobile */
.menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-sm);
  cursor: pointer;
  color: var(--color-text);
}
@media (max-width: 767px) {
  .menu-toggle { display: flex; align-items: center; gap: var(--space-xs); }
  .main-navigation {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-top: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
    padding: var(--space-md);
  }
  .main-navigation.is-open { display: block; }
  .main-navigation ul { flex-direction: column; }
  .main-navigation ul ul {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    padding-left: var(--space-xl);
  }
}

/* =====================================================================
   CONTEÚDO
   ===================================================================== */
.site-main { padding: var(--space-2xl) 0; min-height: 50vh; }

/* Grid de posts */
.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr));
  gap: var(--space-xl);
}

/* Card de post */
.post-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow var(--transition), transform var(--transition);
}
.post-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); }

.post-card__thumbnail { aspect-ratio: 16/9; overflow: hidden; background: var(--color-bg-alt); }
.post-card__thumbnail img { width: 100%; height: 100%; object-fit: cover; transition: transform 400ms ease; }
.post-card:hover .post-card__thumbnail img { transform: scale(1.04); }

.post-card__body { padding: var(--space-lg); flex: 1; display: flex; flex-direction: column; }

.post-card__category {
  display: inline-block;
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--color-primary);
  text-decoration: none;
  margin-bottom: var(--space-sm);
}

.post-card__title { font-size: var(--font-size-lg); margin-bottom: var(--space-sm); line-height: 1.3; }
.post-card__title a { text-decoration: none; color: var(--color-text); }
.post-card__title a:hover { color: var(--color-primary); }

.post-card__excerpt { color: var(--color-text-muted); font-size: var(--font-size-sm); flex: 1; }

.post-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: var(--space-lg);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border);
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.post-card__read-more {
  font-weight: 600;
  font-size: var(--font-size-xs);
  color: var(--color-primary);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  transition: gap var(--transition);
}
.post-card__read-more:hover { gap: var(--space-sm); }

/* =====================================================================
   SINGLE POST
   ===================================================================== */
.single-post-header { max-width: 760px; margin: 0 auto var(--space-2xl); text-align: center; }
.entry-title { font-size: var(--font-size-2xl); line-height: 1.15; }

.post-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-md);
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  margin-top: var(--space-md);
}
.post-meta a { color: inherit; }

.author-avatar {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  vertical-align: middle;
  margin-right: 4px;
}

.post-featured-image {
  width: 100%;
  aspect-ratio: 16/7;
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: var(--space-2xl);
}
.post-featured-image img { width: 100%; height: 100%; object-fit: cover; }

.entry-content { max-width: 760px; margin: 0 auto; font-size: var(--font-size-md); }
.entry-content > * + * { margin-top: var(--space-lg); }
.entry-content h2 { margin-top: var(--space-2xl); }
.entry-content h3 { margin-top: var(--space-xl); }
.entry-content img { max-width: 100%; height: auto; border-radius: var(--radius-md); }

/* =====================================================================
   SIDEBAR / WIDGETS
   ===================================================================== */
.sidebar { display: flex; flex-direction: column; gap: var(--space-xl); }

.widget {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
}
.widget-title {
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--color-border);
}
.widget ul { list-style: none; padding: 0; margin: 0; }
.widget ul li { padding: var(--space-xs) 0; border-bottom: 1px solid var(--color-border); }
.widget ul li:last-child { border-bottom: none; }
.widget ul a { text-decoration: none; font-size: var(--font-size-sm); }

/* =====================================================================
   PAGINAÇÃO
   ===================================================================== */
.pagination, .posts-navigation {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  margin-top: var(--space-3xl);
  flex-wrap: wrap;
}
.page-numbers, .nav-previous a, .nav-next a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 var(--space-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text);
  text-decoration: none;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}
.page-numbers:hover, .nav-previous a:hover, .nav-next a:hover,
.page-numbers.current {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

/* =====================================================================
   FORMULÁRIOS
   ===================================================================== */
input[type="text"],
input[type="email"],
input[type="search"],
input[type="url"],
textarea,
select {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-family: var(--font-base);
  color: var(--color-text);
  background: var(--color-bg);
  transition: border-color var(--transition), box-shadow var(--transition);
  appearance: none;
}
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(26,115,232,.2);
}

button, .btn, input[type="submit"] {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-xl);
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  font-weight: 600;
  font-family: var(--font-base);
  cursor: pointer;
  text-decoration: none;
  transition: background var(--transition), transform var(--transition);
}
button:hover, .btn:hover, input[type="submit"]:hover {
  background: var(--color-primary-dk);
  transform: translateY(-1px);
}

/* =====================================================================
   FOOTER
   ===================================================================== */
.site-footer {
  background: var(--color-text);
  color: rgba(255,255,255,.8);
  padding: var(--space-3xl) 0 var(--space-xl);
  margin-top: var(--space-3xl);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}
@media (min-width: 640px)  { .footer-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 960px)  { .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr; } }

.footer-brand .site-title a { color: #fff; }
.footer-widget-title {
  color: #fff;
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .1em;
  margin-bottom: var(--space-md);
}
.footer-links { list-style: none; padding: 0; margin: 0; }
.footer-links li { margin-bottom: var(--space-sm); }
.footer-links a {
  color: rgba(255,255,255,.6);
  font-size: var(--font-size-sm);
  text-decoration: none;
  transition: color var(--transition);
}
.footer-links a:hover { color: #fff; }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding-top: var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-md);
  font-size: var(--font-size-xs);
  color: rgba(255,255,255,.5);
}
.footer-bottom p { max-width: none; margin: 0; }

.social-links { display: flex; gap: var(--space-sm); }
.social-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: rgba(255,255,255,.1);
  color: rgba(255,255,255,.8);
  text-decoration: none;
  transition: background var(--transition), color var(--transition);
}
.social-links a:hover { background: var(--color-primary); color: #fff; }

/* =====================================================================
   IMAGENS
   ===================================================================== */
img { max-width: 100%; height: auto; display: block; }

/* =====================================================================
   UTILITÁRIOS
   ===================================================================== */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* =====================================================================
   PAGE HEADER
   ===================================================================== */
.page-header { margin-bottom: var(--space-2xl); }
.page-title { font-size: var(--font-size-xl); }

/* =====================================================================
   404 & NO RESULTS
   ===================================================================== */
.no-results { text-align: center; padding: var(--space-3xl) 0; }
.error-404  { text-align: center; padding: var(--space-3xl) 0; }

/* =====================================================================
   POST NAVIGATION
   ===================================================================== */
.post-navigation {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  margin-top: var(--space-2xl);
}
.post-navigation a {
  padding: var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--color-text);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.post-navigation a:hover { border-color: var(--color-primary); box-shadow: var(--shadow-sm); }
.post-navigation .nav-label {
  display: block;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-xs);
}
.post-navigation .nav-next { text-align: right; }

/* =====================================================================
   DARK MODE
   ===================================================================== */
@media (prefers-color-scheme: dark) {
  :root {
    --color-text:       #e8eaed;
    --color-text-muted: #9aa0a6;
    --color-bg:         #1a1a2e;
    --color-bg-alt:     #16213e;
    --color-border:     #3c4043;
  }
  .site-footer { background: #0f0f1a; }
}

/* =====================================================================
   REDUCED MOTION
   ===================================================================== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
}

/* =====================================================================
   PRINT
   ===================================================================== */
@media print {
  .site-header, .site-footer, .sidebar,
  .pagination, .main-navigation, .menu-toggle { display: none; }
  body { font-size: 12pt; color: #000; background: #fff; }
  a { color: #000; text-decoration: underline; }
  .entry-content { max-width: 100%; }
}