/* ==========================================================================
   Energy Hub — Blog (shell de produção)
   Derivado do design aprovado (SDP-261, EnergyHub_blog_shell_v1.html v2).
   Tokens seguem a skill "Brand Guardian Rules — Energy Hub".
   Paleta teal / Montserrat + Open Sans / laranja #E56517 SÓ no "by SDP".
   ========================================================================== */
:root{
  /* Paleta institucional */
  --teal-900:#065663;   /* teal escuro — hero, texto pequeno sobre claro (AA) */
  --teal-800:#0A6E7D;   /* teal escuro — texto teal aprovado (AA) */
  --teal-700:#0C8B9E;   /* principal institucional */
  --teal-500:#1A9DB1;   /* secundária ativa (texto grande/ícone/preenchimento) */
  --teal-200:#82D2DE;   /* clara de apoio (sobre escuro) */
  --teal-comp:#528C8B;  /* complementar */
  --bg-light:#F1F8FA;   /* fundo claro institucional */
  --white:#FFFFFF;
  --ink:#040407;        /* neutro escuro — texto */
  --ink-soft:#33474B;   /* neutro de texto (AA) */
  --ink-muted:#5C7378;  /* neutro de texto secundário (AA) */
  /* Endosso — laranja EXCLUSIVO do "by SDP" no logo */
  --sdp-orange:#E56517;
  /* Grid: base 8px */
  --sp:8px;
  --radius:12px;
  --maxw:1120px;
  --shadow:0 1px 2px rgba(4,4,7,.06), 0 8px 24px rgba(6,86,99,.06);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"Open Sans",system-ui,sans-serif;
  color:var(--ink);
  background:var(--bg-light);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4,.display{font-family:"Montserrat",system-ui,sans-serif;margin:0}
a{color:var(--teal-800);text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}

/* ============================ HEADER / NAV ============================ */
.site-header{
  position:sticky;top:0;z-index:20;background:rgba(255,255,255,.92);
  backdrop-filter:saturate(1.2) blur(8px);border-bottom:1px solid rgba(10,110,125,.12);
}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
/* Logo lockup — placeholder do logo oficial (SDP-138). "by SDP" é o ÚNICO uso do laranja. */
.logo{display:flex;align-items:baseline;gap:8px;font-family:"Montserrat",sans-serif}
.logo .mark{font-weight:700;font-size:20px;color:var(--teal-800);letter-spacing:.01em}
.logo .mark span{color:var(--teal-500)}
.logo .endorse{font-size:11px;font-weight:600;color:var(--sdp-orange);letter-spacing:.02em}
.nav{display:flex;align-items:center;gap:24px}
.nav a{font-size:15px;color:var(--ink-soft);font-weight:600}
.nav a:hover{color:var(--teal-800)}
.nav a.active{color:var(--teal-800);position:relative}
.nav a.active::after{content:"";position:absolute;left:0;right:0;bottom:-22px;height:3px;background:var(--teal-500);border-radius:3px 3px 0 0}
/* Link de volta para o site institucional da Sai do Papel: mesmo tratamento dos
   demais itens do menu — sem contorno nem fundo. O inline-flex só alinha a seta. */
.nav a.back-sdp{display:inline-flex;align-items:center;gap:6px}
.nav a.back-sdp svg{flex:none}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--ink);margin:4px 0;border-radius:2px}

/* ============================ HERO ============================ */
/* Atmosfera DARK (Regra 4 — impacto/abertura). Símbolo ampliado em baixa opacidade. */
.hero{
  position:relative;overflow:hidden;color:var(--white);
  background:linear-gradient(135deg,var(--teal-900) 0%,var(--teal-800) 55%,var(--teal-700) 100%);
}
.hero .symbol{
  position:absolute;right:-80px;top:50%;transform:translateY(-50%);
  width:520px;height:520px;opacity:.08;pointer-events:none;
  /* Grafismo proprietário — recorte parcial do símbolo. Substituir por asset oficial. */
  background:radial-gradient(circle at 50% 50%,transparent 30%,var(--teal-200) 31%,var(--teal-200) 33%,transparent 34%),
             radial-gradient(circle at 50% 50%,transparent 45%,var(--teal-200) 46%,var(--teal-200) 47%,transparent 48%);
  border-radius:50%;
}
.hero .wrap{position:relative;padding:72px 20px 64px;max-width:820px;margin-left:auto;margin-right:auto}
.hero .kicker{
  display:inline-flex;align-items:center;gap:10px;font-family:"Montserrat",sans-serif;
  font-weight:600;font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:var(--teal-200);margin-bottom:18px;
}
.hero .kicker::before{content:"";width:28px;height:3px;background:var(--teal-200);border-radius:2px} /* barra teal — marcador funcional */
.hero h1{font-weight:700;font-size:clamp(34px,6vw,56px);line-height:1.08;letter-spacing:-.01em}
.hero .lead{
  margin-top:20px;font-size:clamp(16px,2.4vw,19px);color:#EAF7F9;max-width:60ch;
}
.hero .lead em{font-style:italic;color:var(--white)}

/* ============================ THEME NAV (pilares) ============================ */
.themes-bar{background:var(--white);border-bottom:1px solid rgba(10,110,125,.12);position:sticky;top:64px;z-index:15}
.themes-bar .wrap{display:flex;gap:10px;align-items:center;overflow-x:auto;padding-top:14px;padding-bottom:14px;-webkit-overflow-scrolling:touch}
.chip{
  flex:0 0 auto;font-family:"Montserrat",sans-serif;font-weight:600;font-size:14px;
  padding:8px 16px;border-radius:999px;border:1.5px solid rgba(10,110,125,.28);
  color:var(--teal-800);background:var(--white);cursor:pointer;white-space:nowrap;
  text-decoration:none;
}
.chip:hover{border-color:var(--teal-500)}
.chip.active{background:var(--teal-800);border-color:var(--teal-800);color:var(--white)}

/* ============================ THEME SECTION ============================ */
.section{padding:56px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:28px}
.section-head .titlewrap{display:flex;align-items:center;gap:14px}
.section-head .bar{width:6px;height:34px;background:var(--teal-500);border-radius:3px;flex:0 0 auto} /* barra vertical teal */
.section-head h2{font-weight:700;font-size:clamp(22px,3.4vw,30px);color:var(--ink)}
.section-head p{margin:4px 0 0;color:var(--ink-muted);font-size:14px}
.section-head .seeall{font-family:"Montserrat",sans-serif;font-weight:600;font-size:14px;color:var(--teal-800);white-space:nowrap}

/* ---- Post grid & card template ---- */
.grid{display:grid;grid-template-columns:1fr;gap:24px}
.card-link{display:block;color:inherit}
.card-link:hover{color:inherit}
.card{
  background:var(--white);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);
  display:flex;flex-direction:column;transition:transform .18s ease,box-shadow .18s ease;
  border:1px solid rgba(10,110,125,.08);height:100%;
}
.card-link:hover .card,.card:hover{transform:translateY(-3px);box-shadow:0 12px 30px rgba(6,86,99,.14)}
.card .thumb{
  aspect-ratio:16/9;background:linear-gradient(135deg,var(--teal-200),var(--teal-comp));
  position:relative;display:flex;align-items:center;justify-content:center;
}
.card .thumb .ph{font-family:"Montserrat",sans-serif;font-weight:600;color:rgba(255,255,255,.85);font-size:13px;letter-spacing:.08em;text-transform:uppercase}
.card .body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.card .theme-tag{
  align-self:flex-start;font-family:"Montserrat",sans-serif;font-weight:600;font-size:11px;
  letter-spacing:.08em;text-transform:uppercase;color:var(--teal-800);
  display:inline-flex;align-items:center;gap:8px;
}
.card .theme-tag::before{content:"";width:14px;height:3px;background:var(--teal-500);border-radius:2px}
.card h3{font-family:"Montserrat",sans-serif;font-weight:600;font-size:19px;line-height:1.28;color:var(--ink)}
.card .excerpt{color:var(--ink-soft);font-size:14.5px;flex:1}
.card .meta{display:flex;align-items:center;gap:8px;color:var(--ink-muted);font-size:12.5px;margin-top:4px;padding-top:12px;border-top:1px solid rgba(10,110,125,.1)}
.card .meta .dot{width:3px;height:3px;border-radius:50%;background:var(--ink-muted)}

/* ---- Feature card (pilar de baixa frequência: 1 post lê como destaque) ---- */
.feature-card{
  display:grid;grid-template-columns:1fr;gap:0;background:var(--white);
  border:1px solid rgba(10,110,125,.12);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);
  color:inherit;transition:transform .18s ease,box-shadow .18s ease;
}
.feature-card:hover{transform:translateY(-3px);box-shadow:0 12px 30px rgba(6,86,99,.14);color:inherit}
.feature-media{aspect-ratio:16/9;background:linear-gradient(135deg,var(--teal-700),var(--teal-900));display:flex;align-items:center;justify-content:center}
.feature-media .ph{font-family:"Montserrat",sans-serif;font-weight:600;color:rgba(255,255,255,.85);font-size:13px;letter-spacing:.08em;text-transform:uppercase}
.feature-body{padding:28px;display:flex;flex-direction:column;gap:12px;justify-content:center}
.feature-body .theme-tag{
  align-self:flex-start;font-family:"Montserrat",sans-serif;font-weight:600;font-size:11px;
  letter-spacing:.08em;text-transform:uppercase;color:var(--teal-800);display:inline-flex;align-items:center;gap:8px;
}
.feature-body .theme-tag::before{content:"";width:14px;height:3px;background:var(--teal-500);border-radius:2px}
.feature-body h3{font-family:"Montserrat",sans-serif;font-weight:600;font-size:clamp(20px,2.6vw,26px);line-height:1.24;color:var(--ink)}
.feature-body .excerpt{color:var(--ink-soft);font-size:15.5px}
.feature-body .meta{display:flex;flex-wrap:wrap;align-items:center;gap:8px;color:var(--ink-muted);font-size:12.5px;margin-top:4px}
.feature-body .meta .dot{width:3px;height:3px;border-radius:50%;background:var(--ink-muted)}
@media (min-width:820px){
  .feature-card{grid-template-columns:1.05fr 1fr}
  .feature-media{aspect-ratio:auto;min-height:300px}
}

/* ---- Empty state ---- */
.tmpl-note{
  font-family:"Montserrat",sans-serif;font-weight:600;font-size:12px;letter-spacing:.06em;text-transform:uppercase;
  color:var(--ink-muted);margin:0 0 14px;display:inline-flex;align-items:center;gap:10px;
}
.tmpl-note::before{content:"";width:22px;height:3px;background:var(--teal-200);border-radius:2px}
.empty{
  background:var(--white);border:1px dashed rgba(10,110,125,.3);border-radius:var(--radius);
  padding:56px 24px;text-align:center;position:relative;overflow:hidden;
}
.empty .glyph{
  width:76px;height:76px;margin:0 auto 18px;border-radius:50%;
  background:var(--bg-light);border:2px solid var(--teal-200);
  display:flex;align-items:center;justify-content:center;color:var(--teal-700);font-size:30px;font-family:"Montserrat",sans-serif;font-weight:700;
}
.empty h3{font-family:"Montserrat",sans-serif;font-weight:600;font-size:20px;color:var(--ink);margin-bottom:8px}
.empty p{color:var(--ink-muted);max-width:46ch;margin:0 auto}

/* ============================ ARTICLE PAGE TEMPLATE ============================ */
.article-hero{background:var(--white);border-bottom:1px solid rgba(10,110,125,.12)}
.article-hero .wrap{max-width:760px;padding:44px 20px 8px}
.breadcrumb{font-size:13px;color:var(--ink-muted);margin-bottom:20px}
.breadcrumb a{color:var(--ink-muted)}
.breadcrumb a:hover{color:var(--teal-800)}
.article-hero .theme-tag{
  font-family:"Montserrat",sans-serif;font-weight:600;font-size:11px;letter-spacing:.08em;
  text-transform:uppercase;color:var(--teal-800);display:inline-flex;align-items:center;gap:8px;margin-bottom:14px;
}
.article-hero .theme-tag::before{content:"";width:14px;height:3px;background:var(--teal-500);border-radius:2px}
.article-hero h1{font-weight:700;font-size:clamp(28px,4.6vw,42px);line-height:1.14;color:var(--ink);letter-spacing:-.01em}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;color:var(--ink-muted);font-size:13.5px;margin-top:16px}
.article-meta .dot{width:3px;height:3px;border-radius:50%;background:var(--ink-muted)}
.article-cover{aspect-ratio:16/8;background:linear-gradient(135deg,var(--teal-700),var(--teal-900));margin-top:28px;display:flex;align-items:center;justify-content:center}
.article-cover .ph{font-family:"Montserrat",sans-serif;font-weight:600;color:rgba(255,255,255,.85);font-size:13px;letter-spacing:.08em;text-transform:uppercase}
.article-body{max-width:680px;margin:0 auto;padding:40px 20px 0}
.article-body p{font-size:17px;color:var(--ink-soft);margin:0 0 22px}
.article-body h2{font-family:"Montserrat",sans-serif;font-weight:600;font-size:24px;color:var(--ink);margin:36px 0 14px}
.article-body blockquote{
  margin:28px 0;padding:4px 0 4px 22px;border-left:4px solid var(--teal-500);
  font-size:19px;color:var(--ink);font-style:italic;
}
.source-box{
  max-width:680px;margin:36px auto 0;padding:20px 22px;background:var(--white);
  border:1px solid rgba(10,110,125,.16);border-left:4px solid var(--teal-700);border-radius:8px;
}
.source-box .lbl{font-family:"Montserrat",sans-serif;font-weight:600;font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--teal-800);margin-bottom:6px}
.source-box a{font-weight:600;word-break:break-word}
.article-foot{max-width:680px;margin:28px auto 0;padding:0 20px}
.back-link{font-family:"Montserrat",sans-serif;font-weight:600;font-size:14px;color:var(--teal-800)}

/* ============================ FOOTER ============================ */
.site-footer{background:var(--teal-900);color:#CFE9ED;margin-top:64px}
.site-footer .wrap{padding:40px 20px;display:flex;flex-wrap:wrap;gap:24px;justify-content:space-between;align-items:center}
.site-footer .logo .mark{color:var(--white)}
.site-footer .logo .mark span{color:var(--teal-200)}
.site-footer nav{display:flex;gap:20px;flex-wrap:wrap}
.site-footer nav a{color:#CFE9ED;font-size:14px}
.site-footer nav a:hover{color:var(--white)}

/* ============================ RESPONSIVE ============================ */
@media (min-width:640px){
  .grid{grid-template-columns:repeat(2,1fr)}
}
@media (min-width:960px){
  .grid{grid-template-columns:repeat(3,1fr)}
}
@media (max-width:720px){
  .nav{position:fixed;inset:64px 0 auto 0;background:var(--white);flex-direction:column;align-items:flex-start;
       gap:0;padding:8px 20px 16px;border-bottom:1px solid rgba(10,110,125,.12);display:none}
  .nav.open{display:flex}
  .nav a{padding:12px 0;width:100%}
  .nav a.active::after{display:none}
  .nav-toggle{display:block}
  .hero .wrap{padding:52px 20px 44px}
  .section{padding:40px 0}
  .section-head{flex-direction:column;align-items:flex-start}
}