/* =========================================================================
   SmartHome-AI — folha de estilo única
   Tema escuro por padrão, claro opcional via [data-theme="light"].
   ========================================================================= */

:root {
  /* Marca */
  --green-900: #06251a;
  --green-700: #0e5132;
  --green-500: #1c8a56;
  --green-400: #2fb377;
  --gold-400: #e8c877;
  --gold-500: #c9a227;
  --gold-600: #a37d15;

  /* Superfícies (escuro) */
  --bg: #080d0c;
  --bg-soft: #0d1413;
  --surface: #111a18;
  --surface-2: #17211f;
  --border: #223029;
  --border-soft: #1a2422;

  /* Texto */
  --text: #e8efeb;
  --text-soft: #a9bcb4;
  --text-dim: #7b8f88;
  --accent: var(--gold-400);
  --accent-ink: #0b1110;
  --link: #5fd39a;

  /* Semântica de tabela */
  --good: #48c98a;
  --mid: #e0bb62;
  --bad: #e58074;

  /* Layout */
  --wrap: 1140px;
  --radius: 14px;
  --radius-lg: 22px;
  --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 12px 32px -18px rgba(0, 0, 0, .8);
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

:root[data-theme="light"] {
  --bg: #fbfcfb;
  --bg-soft: #f2f6f3;
  --surface: #ffffff;
  --surface-2: #f4f8f5;
  --border: #dde7e0;
  --border-soft: #e8efe9;
  --text: #0d1a14;
  --text-soft: #465a51;
  --text-dim: #6d8278;
  --accent: var(--gold-600);
  --accent-ink: #ffffff;
  --link: #0f7a4b;
  --good: #158a56;
  --mid: #9a7414;
  --bad: #b4443a;
  --shadow: 0 1px 2px rgba(16, 40, 30, .06), 0 14px 30px -20px rgba(16, 40, 30, .35);
}

/* ---------------------------------------------------------------- base -- */
* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 90px; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

[hidden] { display: none !important; }

a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

h1, h2, h3, h4 { line-height: 1.2; letter-spacing: -.02em; margin: 0 0 .5em; }
h1 { font-size: clamp(2rem, 1.3rem + 2.6vw, 3.2rem); font-weight: 700; }
h2 { font-size: clamp(1.5rem, 1.15rem + 1.3vw, 2.1rem); font-weight: 650; }
h3 { font-size: 1.2rem; font-weight: 600; }

p { margin: 0 0 1.1em; }

.wrap { width: min(var(--wrap), calc(100% - 2.5rem)); margin-inline: auto; }

.icon { width: 24px; height: 24px; }
.icon-lg { width: 28px; height: 28px; }

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

.eyebrow {
  font-size: .78rem; font-weight: 600; letter-spacing: .12em;
  text-transform: uppercase; color: var(--accent); margin: 0 0 .8rem;
}

.lead { font-size: 1.12rem; color: var(--text-soft); max-width: 62ch; }

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--accent); color: var(--accent-ink);
  padding: .6rem 1rem; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }

/* -------------------------------------------------------------- header -- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid var(--border-soft);
}

.header-inner {
  display: flex; align-items: center; gap: 1.2rem;
  min-height: 68px;
}

.brand { display: flex; align-items: center; gap: .7rem; color: var(--text); flex: none; }
.brand:hover { text-decoration: none; }
.brand-mark { width: 38px; height: 38px; flex: none; }
.brand-text strong { display: block; font-size: 1.02rem; letter-spacing: -.02em; }
.brand-text small { display: block; font-size: .7rem; color: var(--text-dim); letter-spacing: .04em; }

.site-nav { display: flex; gap: .3rem; margin-left: auto; }
.site-nav a {
  color: var(--text-soft); font-size: .93rem; font-weight: 500;
  padding: .45rem .75rem; border-radius: 9px;
}
.site-nav a:hover { color: var(--text); background: var(--surface); text-decoration: none; }
.site-nav a.active { color: var(--accent); background: var(--surface); }

.header-actions { display: flex; gap: .3rem; align-items: center; }

.icon-btn {
  display: grid; place-items: center;
  width: 38px; height: 38px; padding: 0;
  border: 1px solid var(--border); border-radius: 10px;
  background: var(--surface); color: var(--text-soft); cursor: pointer;
  transition: color .15s, border-color .15s;
}
.icon-btn:hover { color: var(--accent); border-color: var(--accent); }
.icon-btn svg { width: 19px; height: 19px; }
.menu-btn { display: none; }

:root[data-theme="light"] .i-moon { display: none; }
:root:not([data-theme="light"]) .i-sun { display: none; }

/* ---------------------------------------------------------------- hero -- */
.hero { position: relative; padding: clamp(3.5rem, 8vw, 7rem) 0 clamp(2.5rem, 5vw, 4rem); overflow: hidden; }
.hero-glow {
  position: absolute; inset: -40% 0 auto 50%; translate: -50% 0;
  width: 900px; height: 700px; pointer-events: none;
  background:
    radial-gradient(45% 50% at 50% 50%, color-mix(in srgb, var(--green-500) 28%, transparent), transparent 70%),
    radial-gradient(30% 35% at 70% 40%, color-mix(in srgb, var(--gold-500) 16%, transparent), transparent 70%);
  filter: blur(18px); opacity: .55;
}
.hero-inner { position: relative; }
.hero h1 { max-width: 20ch; }
.grad {
  background: linear-gradient(100deg, var(--gold-400), var(--green-400) 65%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero .lead { font-size: 1.18rem; max-width: 66ch; }
:root[data-theme="light"] .grad { background-image: linear-gradient(100deg, var(--gold-600), var(--green-700) 65%); }

.cta-row { display: flex; flex-wrap: wrap; gap: .7rem; margin: 1.8rem 0 0; }

.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .75rem 1.3rem; border-radius: 11px;
  font-weight: 600; font-size: .97rem; border: 1px solid transparent;
  transition: transform .12s ease, box-shadow .15s ease, background .15s;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: linear-gradient(135deg, var(--gold-400), var(--gold-500)); color: #1a1405; box-shadow: 0 10px 26px -14px var(--gold-500); }
.btn-ghost { border-color: var(--border); color: var(--text); background: var(--surface); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

.hero-stats {
  display: flex; flex-wrap: wrap; gap: 2.4rem; margin: 2.6rem 0 0; padding: 1.4rem 0 0;
  border-top: 1px solid var(--border-soft);
}
.hero-stats div { margin: 0; }
.hero-stats dt { font-size: .74rem; text-transform: uppercase; letter-spacing: .1em; color: var(--text-dim); }
.hero-stats dd { margin: .25rem 0 0; font-weight: 600; color: var(--text); }

/* ------------------------------------------------------------ sections -- */
.section { padding: clamp(2.5rem, 6vw, 4.5rem) 0; }
.section-head { max-width: 62ch; margin-bottom: 2rem; }
.section-head p { color: var(--text-soft); margin: 0; }
.section-more { margin-top: 1.6rem; font-weight: 600; }

/* trilha */
.steps { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); list-style: none; padding: 0; margin: 0; counter-reset: s; }
.steps li {
  position: relative; padding: 1.5rem 1.4rem 1.3rem;
  background: var(--surface); border: 1px solid var(--border-soft); border-radius: var(--radius);
}
.step-num {
  display: grid; place-items: center; width: 30px; height: 30px; margin-bottom: .9rem;
  border-radius: 9px; font-weight: 700; font-size: .9rem;
  background: color-mix(in srgb, var(--gold-500) 20%, transparent); color: var(--accent);
}
.steps h3 { margin-bottom: .35rem; }
.steps p { color: var(--text-soft); font-size: .95rem; margin-bottom: .8rem; }
.steps a { font-weight: 600; font-size: .92rem; }

/* cards */
.cards { display: grid; gap: 1rem; grid-template-columns: repeat(auto-fill, minmax(290px, 1fr)); }
.card {
  display: flex; flex-direction: column; gap: .35rem;
  padding: 1.5rem 1.4rem; color: var(--text);
  background: var(--surface); border: 1px solid var(--border-soft);
  border-radius: var(--radius); transition: border-color .18s, transform .18s, box-shadow .18s;
}
.card:hover { text-decoration: none; border-color: color-mix(in srgb, var(--gold-500) 45%, var(--border)); transform: translateY(-3px); box-shadow: var(--shadow); }
.card-icon {
  display: grid; place-items: center; width: 42px; height: 42px; margin-bottom: .7rem;
  border-radius: 11px; color: var(--accent);
  background: color-mix(in srgb, var(--green-500) 16%, transparent);
}
.card-tag { font-size: .72rem; text-transform: uppercase; letter-spacing: .1em; color: var(--text-dim); }
.card h3 { margin: .15rem 0 .3rem; font-size: 1.08rem; }
.card p { color: var(--text-soft); font-size: .94rem; margin: 0 0 1rem; }
.card-go { margin-top: auto; font-size: .88rem; font-weight: 600; color: var(--accent); }

/* tabela comparativa */
.table-wrap { overflow-x: auto; border: 1px solid var(--border-soft); border-radius: var(--radius); background: var(--surface); }
table { width: 100%; border-collapse: collapse; font-size: .94rem; }
thead th { text-align: left; padding: .9rem 1rem; font-size: .78rem; text-transform: uppercase; letter-spacing: .08em; color: var(--text-dim); border-bottom: 1px solid var(--border); }
tbody th { text-align: left; font-weight: 600; }
tbody td, tbody th { padding: .85rem 1rem; border-bottom: 1px solid var(--border-soft); vertical-align: top; }
tbody tr:last-child td, tbody tr:last-child th { border-bottom: 0; }
td.good { color: var(--good); }
td.mid { color: var(--mid); }
td.bad { color: var(--bad); }
.table-note { margin-top: .9rem; font-size: .9rem; color: var(--text-dim); }

/* lista de posts */
.post-list { list-style: none; margin: 0; padding: 0; display: grid; gap: .6rem; }
.post a {
  display: flex; gap: 1rem; align-items: flex-start; padding: 1.1rem 1.2rem; color: var(--text);
  background: var(--surface); border: 1px solid var(--border-soft); border-radius: var(--radius);
  transition: border-color .18s, transform .18s;
}
.post a:hover { text-decoration: none; border-color: color-mix(in srgb, var(--gold-500) 40%, var(--border)); transform: translateX(3px); }
.post-icon { display: grid; place-items: center; width: 40px; height: 40px; flex: none; border-radius: 10px; color: var(--accent); background: color-mix(in srgb, var(--green-500) 14%, transparent); }
.post-body { display: block; }
.post-title { display: block; font-weight: 600; }
.post-desc { display: block; color: var(--text-soft); font-size: .93rem; margin-top: .15rem; }
.post-meta { display: block; color: var(--text-dim); font-size: .78rem; margin-top: .45rem; text-transform: uppercase; letter-spacing: .07em; }

/* painel destacado */
.panel {
  padding: clamp(1.8rem, 4vw, 3rem); border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background:
    radial-gradient(80% 140% at 100% 0%, color-mix(in srgb, var(--green-700) 34%, transparent), transparent 60%),
    var(--surface);
}
.panel h2 { max-width: 20ch; }
.panel p { color: var(--text-soft); max-width: 70ch; }

/* -------------------------------------------------------------- páginas -- */
.page { width: min(var(--wrap), calc(100% - 2.5rem)); margin: 0 auto; padding: clamp(2.5rem, 6vw, 4rem) 0 4rem; }
.page-head { max-width: 70ch; margin-bottom: 2.5rem; }
.byline { color: var(--text-dim); font-size: .85rem; margin: .6rem 0 0; }

.article-grid { display: grid; grid-template-columns: minmax(0, 1fr); gap: 2.5rem; }
@media (min-width: 1000px) {
  .article-grid { grid-template-columns: 220px minmax(0, 1fr); align-items: start; }
  .toc { position: sticky; top: 92px; }
}

.toc { font-size: .88rem; border-left: 2px solid var(--border); padding-left: 1rem; }
.toc-title { font-size: .72rem; text-transform: uppercase; letter-spacing: .1em; color: var(--text-dim); margin: 0 0 .6rem; }
.toc ul { list-style: none; margin: 0; padding: 0; }
.toc ul ul { padding-left: .9rem; }
.toc li { margin: .35rem 0; }
.toc a { color: var(--text-soft); }
.toc a:hover, .toc a.active { color: var(--accent); text-decoration: none; }

/* prosa */
.prose { max-width: 72ch; }
.prose h2 { margin-top: 2.6rem; padding-top: .4rem; }
.prose h3 { margin-top: 1.8rem; }
.prose h2 .headerlink, .prose h3 .headerlink { margin-left: .4rem; opacity: 0; color: var(--text-dim); font-weight: 400; }
.prose h2:hover .headerlink, .prose h3:hover .headerlink { opacity: 1; text-decoration: none; }
.prose ul, .prose ol { padding-left: 1.3rem; margin: 0 0 1.2rem; }
.prose li { margin: .4rem 0; }
.prose li::marker { color: var(--accent); }
.prose strong { color: var(--text); }
.prose blockquote {
  margin: 1.5rem 0; padding: .2rem 0 .2rem 1.2rem;
  border-left: 3px solid var(--gold-500); color: var(--text-soft); font-style: italic;
}
.prose hr { border: 0; border-top: 1px solid var(--border-soft); margin: 2.5rem 0; }
.prose table { margin: 1.5rem 0; border: 1px solid var(--border-soft); border-radius: var(--radius); overflow: hidden; }

/* código */
code {
  font-family: var(--mono); font-size: .88em;
  background: var(--surface-2); border: 1px solid var(--border-soft);
  padding: .12em .4em; border-radius: 6px; color: var(--accent);
}
pre {
  position: relative; margin: 1.4rem 0; padding: 1.1rem 1.2rem; overflow-x: auto;
  background: var(--surface-2); border: 1px solid var(--border);
  border-radius: var(--radius); font-size: .88rem; line-height: 1.6;
}
pre code { background: none; border: 0; padding: 0; color: var(--text); font-size: 1em; }
.copy-btn {
  position: absolute; top: .6rem; right: .6rem; padding: .3rem .6rem;
  font-size: .72rem; font-weight: 600; border-radius: 7px; cursor: pointer;
  background: var(--surface); color: var(--text-dim);
  border: 1px solid var(--border); opacity: 0; transition: opacity .15s, color .15s;
}
pre:hover .copy-btn, .copy-btn:focus { opacity: 1; }
.copy-btn:hover { color: var(--accent); border-color: var(--accent); }

/* avisos (admonition) */
.admonition {
  margin: 1.6rem 0; padding: 1.1rem 1.2rem; border-radius: var(--radius);
  border: 1px solid var(--border); border-left: 3px solid var(--gold-500);
  background: var(--surface);
}
.admonition > :last-child { margin-bottom: 0; }
.admonition-title { font-weight: 650; color: var(--accent); margin: 0 0 .4rem; }
.admonition.dica, .admonition.tip { border-left-color: var(--green-400); }
.admonition.dica .admonition-title, .admonition.tip .admonition-title { color: var(--green-400); }
.admonition.atencao, .admonition.warning { border-left-color: var(--bad); }
.admonition.atencao .admonition-title, .admonition.warning .admonition-title { color: var(--bad); }

/* tags e paginação */
.tags { display: flex; flex-wrap: wrap; gap: .45rem; list-style: none; padding: 0; margin: 2.5rem 0 0; }
.tags li {
  font-size: .78rem; padding: .28rem .7rem; border-radius: 99px;
  background: var(--surface-2); border: 1px solid var(--border-soft); color: var(--text-dim);
}

.pager { display: grid; gap: .8rem; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); margin-top: 3.5rem; padding-top: 2rem; border-top: 1px solid var(--border-soft); }
.pager a { display: block; padding: 1rem 1.2rem; border: 1px solid var(--border-soft); border-radius: var(--radius); background: var(--surface); color: var(--text); }
.pager a:hover { text-decoration: none; border-color: var(--accent); }
.pager span { display: block; font-size: .76rem; text-transform: uppercase; letter-spacing: .08em; color: var(--text-dim); margin-bottom: .2rem; }
.pager-next { text-align: right; }

/* -------------------------------------------------------------- footer -- */
.site-footer { margin-top: 4rem; border-top: 1px solid var(--border-soft); background: var(--bg-soft); }
.footer-inner { display: grid; gap: 2.5rem; padding: 3rem 0 2rem; grid-template-columns: minmax(0, 1fr); }
@media (min-width: 760px) { .footer-inner { grid-template-columns: 1.2fr 2fr; } }
.footer-brand strong { font-size: 1.1rem; }
.footer-brand p { color: var(--text-dim); font-size: .92rem; margin: .5rem 0 0; max-width: 40ch; }
.footer-nav { display: grid; gap: 1.5rem; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); }
.footer-nav h4 { font-size: .76rem; text-transform: uppercase; letter-spacing: .1em; color: var(--text-dim); margin: 0 0 .7rem; }
.footer-nav a { display: block; color: var(--text-soft); font-size: .92rem; padding: .18rem 0; }
.footer-nav a:hover { color: var(--accent); text-decoration: none; }
.footer-bottom { display: flex; flex-wrap: wrap; gap: .5rem 2rem; justify-content: space-between; padding: 1.2rem 0 2rem; border-top: 1px solid var(--border-soft); }
.footer-bottom p { margin: 0; font-size: .82rem; color: var(--text-dim); }

/* -------------------------------------------------------------- busca -- */
.search-modal { position: fixed; inset: 0; z-index: 80; display: grid; place-items: start center; padding: 12vh 1rem 1rem; }
.search-backdrop { position: absolute; inset: 0; background: rgba(0, 0, 0, .55); backdrop-filter: blur(3px); }
.search-box {
  position: relative; width: min(620px, 100%); max-height: 70vh; overflow: hidden;
  display: flex; flex-direction: column;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); box-shadow: 0 30px 70px -30px #000;
}
.search-field { display: flex; align-items: center; gap: .7rem; padding: 1rem 1.1rem; border-bottom: 1px solid var(--border-soft); }
.search-field svg { width: 19px; height: 19px; color: var(--text-dim); flex: none; }
.search-field input { flex: 1; background: none; border: 0; color: var(--text); font: inherit; font-size: 1rem; outline: none; }
.search-field kbd { font-family: var(--mono); font-size: .7rem; color: var(--text-dim); border: 1px solid var(--border); border-radius: 6px; padding: .15rem .4rem; }
.search-results { list-style: none; margin: 0; padding: .5rem; overflow-y: auto; }
.search-results li a { display: block; padding: .7rem .8rem; border-radius: 10px; color: var(--text); }
.search-results li a:hover, .search-results li.sel a { background: var(--surface-2); text-decoration: none; }
.search-results strong { display: block; font-size: .95rem; }
.search-results small { color: var(--text-dim); font-size: .84rem; }
.search-empty { padding: 1.5rem 1.2rem; color: var(--text-dim); font-size: .92rem; text-align: center; }
mark { background: color-mix(in srgb, var(--gold-500) 35%, transparent); color: inherit; border-radius: 3px; padding: 0 .1em; }

/* ---------------------------------------------------------- responsivo -- */
@media (max-width: 860px) {
  .menu-btn { display: grid; }
  .site-nav {
    position: fixed; inset: 68px 0 auto; z-index: 40;
    flex-direction: column; gap: 0; padding: .6rem 1.25rem 1.2rem;
    background: var(--bg); border-bottom: 1px solid var(--border);
    display: none;
  }
  .site-nav.open { display: flex; }
  .site-nav a { padding: .8rem .4rem; border-bottom: 1px solid var(--border-soft); border-radius: 0; }
  .hero-stats { gap: 1.4rem 2rem; }
  .pager-next { text-align: left; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}

@media print {
  .site-header, .site-footer, .toc, .pager, .search-modal { display: none !important; }
  body { background: #fff; color: #000; }
}