/* Core theme (light/dark aware) */
:root{
  --brand-h: 210; --brand-s: 85%; --brand-l: 40%;
  --brand: hsl(var(--brand-h) var(--brand-s) var(--brand-l));
  --brand-700: hsl(var(--brand-h) var(--brand-s) calc(var(--brand-l) - 12%));
  --accent: hsl(35 90% 52%);
  --bg:#0b0e11; --fg:#e6edf3; --muted:#9fb1c1; --card:#11161b; --border:#22303c;
}
@media (prefers-color-scheme: light){
  :root{ --bg:#ffffff; --fg:#0c1116; --muted:#5b6b76; --card:#f6f8fa; --border:#d8dee4; }
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--fg);font:15px/1.45 system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,"Helvetica Neue",Arial}
a{color:var(--brand)} a:hover{color:var(--brand-700)}
.container{max-width:1100px;margin-inline:auto;padding:16px}

.site-header{position:sticky;top:0;z-index:40;background:linear-gradient(180deg, rgba(0,0,0,.35), transparent), var(--bg);border-bottom:1px solid var(--border);backdrop-filter:saturate(1.1) blur(6px)}
.topbar{display:flex;align-items:center;gap:12px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700}
.logo-badge{width:32px;height:32px;border-radius:10px;background:var(--brand);display:grid;place-items:center;color:white;font-weight:800}
.logo-image{width:32px;height:32px;border-radius:10px;object-fit:cover}
.logo-full{height:40px;width:auto;object-fit:contain}
.badge{background:var(--accent); color:#111; border-radius:8px; font-weight:700; padding:2px 8px}
.grow{flex:1}
.controls select{background:transparent; color:var(--fg); border:none; border-radius:10px; padding:8px 10px}

.tabs{display:flex;gap:8px;padding:8px 0}
.tabs a{padding:8px 12px;border:1px solid var(--border);border-radius:999px;text-decoration:none;white-space:nowrap}
.tabs a.active{background:var(--brand);border-color:transparent;color:#fff}

.hero{display:grid;gap:8px;margin:16px 0}
.pill{display:inline-flex;align-items:center;gap:6px;font-size:12px;border:1px solid var(--border);border-radius:999px;padding:6px 12px;color:var(--muted);text-decoration:none}
.panel{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:14px}
.kicker{color:var(--muted);font-size:13px}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
@media (max-width:900px){.grid-2{grid-template-columns:1fr}}

.ad-slot{display:grid;place-items:center;aspect-ratio: 3.2/1;border:1px dashed var(--border);border-radius:12px;color:var(--muted);font-size:12px;margin:12px 0}

.footer{border-top:1px solid var(--border);padding:18px 0;margin-top:16px}

/* Calculator cards */
.cards{display:grid;grid-template-columns:repeat(3, minmax(0,1fr));gap:12px}
@media (max-width:1100px){.cards{grid-template-columns:repeat(2, minmax(0,1fr))}}
@media (max-width:640px){.cards{grid-template-columns:1fr}}
.card{background:var(--card); border:1px solid var(--border); border-radius:16px; padding:14px; display:flex; flex-direction:column; gap:10px}
.card h3{margin:0;font-size:16px}
.row{display:grid;grid-template-columns:1fr 1fr;gap:10px}
@media (max-width:640px){.row{grid-template-columns:1fr}}
.input{display:grid;gap:6px}
input[type="number"], input[type="text"], select{background:var(--card); color:var(--fg); border:1px solid var(--border); border-radius:10px; padding:8px 10px}
button{background:var(--card); color:var(--fg); border:1px solid var(--border); border-radius:10px; padding:8px 10px; cursor:pointer}
button.primary{background:var(--brand); border-color:transparent}
.result{padding:10px;border:1px dashed var(--border);border-radius:12px}

/* Nova Calculadora - Layout de Duas Colunas */
.calc-layout{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin:20px 0}
@media (max-width:900px){.calc-layout{grid-template-columns:1fr}}

.calc-inputs{display:flex;flex-direction:column;gap:16px}
.calc-content{display:flex;flex-direction:column;gap:16px}

.calc-form{display:flex;flex-direction:column;gap:16px}
.input-group{display:flex;flex-direction:column;gap:6px;position:relative}
.input-group label{font-weight:600;color:var(--fg);font-size:15px}
.input-group input{padding-right:40px}
.input-group .unit{position:absolute;right:12px;bottom:10px;color:var(--muted);font-size:12px;font-weight:600}

.calc-buttons{display:flex;gap:10px;margin-top:10px}
.calc-buttons button{flex:1}

.formula-box{background:var(--card);border:1px solid var(--border);border-radius:8px;padding:12px;margin:10px 0;font-family:monospace}
.formula-box code{color:var(--brand);font-weight:600}

.banner-top, .banner-bottom{margin:16px 0;aspect-ratio:7.3/1} /* 728x90 ratio */
.banner-calc{margin:16px 0;aspect-ratio:1.2/1} /* 300x250 ratio */

/* Elementos visuais avançados para conteúdo */
.calc-image-container{text-align:center;margin:20px 0}
.calc-diagram{max-width:100%;height:auto;border-radius:8px;box-shadow:0 2px 8px rgba(0,0,0,0.1)}
.image-caption{font-size:11px;color:var(--muted);margin-top:8px;font-style:italic}

.formula-variations{display:grid;gap:12px;margin:16px 0}
.formula-item{display:flex;align-items:center;gap:12px;padding:8px;background:var(--card);border:1px solid var(--border);border-radius:8px}
.formula-item code{color:var(--brand);font-weight:600;min-width:100px}
.formula-item span{color:var(--muted);font-size:12px}

.example-box{background:linear-gradient(135deg, var(--card), rgba(var(--brand-h), var(--brand-s), 95%));border:1px solid var(--border);border-radius:12px;padding:16px;margin:16px 0}
.calculation-steps{background:var(--bg);border-radius:8px;padding:12px;margin-top:12px}
.calculation-steps p{margin:6px 0;font-family:monospace;font-size:13px}

.applications-grid{display:grid;grid-template-columns:repeat(auto-fit, minmax(200px, 1fr));gap:16px;margin:16px 0}
.app-item{background:var(--card);border:1px solid var(--border);border-radius:8px;padding:12px}
.app-item h5{margin:0 0 8px 0;color:var(--brand);font-size:14px}

.warning-box, .tips-box{border-radius:8px;padding:16px;margin:16px 0}
.warning-box{background:rgba(255, 59, 48, 0.1);border:1px solid rgba(255, 59, 48, 0.3)}
.tips-box{background:rgba(52, 199, 89, 0.1);border:1px solid rgba(52, 199, 89, 0.3)}
.warning-box h5, .tips-box h5{margin:0 0 8px 0;font-size:14px}

.quote-box{background:var(--card);border-left:4px solid var(--brand);padding:16px;margin:16px 0;border-radius:0 8px 8px 0}
.quote-box blockquote{margin:0;font-style:italic;color:var(--muted)}
.quote-box cite{display:block;text-align:right;margin-top:8px;font-size:12px;color:var(--brand)}

/* Contact System Styles */
.contact-intro{margin-bottom:24px}
.contact-intro p{color:var(--muted);line-height:1.6}

.contact-features{display:grid;grid-template-columns:repeat(auto-fit, minmax(250px, 1fr));gap:16px;margin:20px 0}
.feature-item{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:16px;text-align:center}
.feature-item h4{margin:0 0 8px 0;font-size:16px;color:var(--brand)}
.feature-item p{margin:0;font-size:14px;color:var(--muted);line-height:1.5}

.response-info{background:rgba(var(--brand-h), calc(var(--brand-s) * 1%), calc(var(--brand-l) * 1%), 0.1);border:1px solid rgba(var(--brand-h), calc(var(--brand-s) * 1%), calc(var(--brand-l) * 1%), 0.3);border-radius:8px;padding:16px;margin:20px 0}
.response-info p{margin:0;text-align:center}

.contact-form{max-width:600px;margin:0 auto}
.form-group{margin-bottom:20px}
.form-group label{display:block;margin-bottom:6px;font-weight:500;color:var(--fg)}
.form-group input, .form-group select, .form-group textarea{width:100%;background:var(--card);color:var(--fg);border:1px solid var(--border);border-radius:8px;padding:12px;font-size:14px;transition:border-color 0.2s ease}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus{outline:none;border-color:var(--brand)}
.form-group textarea{resize:vertical;min-height:120px;font-family:inherit;line-height:1.5}

.checkbox-group{display:flex;align-items:flex-start;gap:10px}
.checkbox-label{display:flex;align-items:center;gap:8px;cursor:pointer;font-size:14px;line-height:1.4}
.checkbox-label input[type="checkbox"]{width:auto;margin:0}
.checkmark{width:18px;height:18px;border:2px solid var(--border);border-radius:4px;display:flex;align-items:center;justify-content:center;transition:all 0.2s ease}
.checkbox-label input[type="checkbox"]:checked + .checkmark{background:var(--brand);border-color:var(--brand)}
.checkbox-label input[type="checkbox"]:checked + .checkmark::before{content:'✓';color:white;font-size:12px;font-weight:bold}

.error-message{display:none;color:#ff3b30;font-size:12px;margin-top:4px}
.form-group.error input, .form-group.error select, .form-group.error textarea{border-color:#ff3b30}
.form-group input.error, .form-group select.error, .form-group textarea.error{border-color:#ff3b30}

.form-actions{display:flex;gap:12px;justify-content:center;margin-top:24px}
.btn-primary, .btn-secondary{padding:12px 24px;border-radius:8px;font-size:14px;font-weight:500;cursor:pointer;transition:all 0.2s ease;border:none;text-decoration:none;display:inline-flex;align-items:center;gap:8px}
.btn-primary{background:var(--brand);color:white}
.btn-primary:hover{background:var(--brand-700);transform:translateY(-1px)}
.btn-primary:disabled{background:var(--muted);cursor:not-allowed;transform:none}
.btn-secondary{background:transparent;color:var(--fg);border:1px solid var(--border)}
.btn-secondary:hover{background:var(--card);border-color:var(--brand)}

.btn-loading{display:none}

.form-message{margin:20px 0;padding:16px;border-radius:8px;text-align:center;font-weight:500}
.form-message.success{background:rgba(52, 199, 89, 0.1);border:1px solid rgba(52, 199, 89, 0.3);color:rgba(52, 199, 89, 1)}
.form-message.error{background:rgba(255, 59, 48, 0.1);border:1px solid rgba(255, 59, 48, 0.3);color:rgba(255, 59, 48, 1)}
.form-message.info{background:rgba(0, 122, 255, 0.1);border:1px solid rgba(0, 122, 255, 0.3);color:rgba(0, 122, 255, 1)}

.contact-info{margin-top:32px;padding-top:24px;border-top:1px solid var(--border)}
.contact-info h3{margin:0 0 16px 0;color:var(--brand)}
.contact-methods{display:grid;gap:12px}
.contact-method{display:flex;flex-direction:column;gap:4px}
.contact-method strong{color:var(--fg)}
.contact-method span, .contact-method a{color:var(--muted);text-decoration:none}
.contact-method a:hover{color:var(--brand)}

/* Analytics Integration Styles */
.analytics-placeholder{display:none}

/* Responsive adjustments for contact page */
@media (max-width: 640px) {
    .contact-features{grid-template-columns:1fr}
    .form-actions{flex-direction:column}
    .btn-primary, .btn-secondary{width:100%}
}

/* Standard Components Styles */
.header{background:var(--card);border-bottom:1px solid var(--border);padding:12px 0;position:sticky;top:0;z-index:100;backdrop-filter:blur(10px)}
.header-content{display:flex;align-items:center;justify-content:space-between;max-width:1200px;margin:0 auto;padding:0 16px}
.logo{margin:0;font-size:24px;font-weight:700;color:var(--brand)}
.logo a{text-decoration:none;color:inherit}

.nav-menu ul{list-style:none;margin:0;padding:0;display:flex;gap:24px}
.nav-menu a{text-decoration:none;color:var(--fg);font-weight:500;padding:8px 12px;border-radius:6px;transition:all 0.2s ease}
.nav-menu a:hover{background:var(--card);color:var(--brand)}
.nav-menu a.active{background:var(--brand);color:white}

.language-selector select{background:var(--card);color:var(--fg);border:1px solid var(--border);border-radius:8px;padding:8px 12px;font-size:14px}
.language-selector select:focus{outline:none;border-color:var(--brand)}

.banner-container{display:flex;justify-content:center;margin:16px 0}
.banner-top{margin-top:0}
.banner-bottom{margin-bottom:0}
.banner-side{position:sticky;top:100px;align-self:flex-start}
.banner-placeholder{background:var(--card);border:1px dashed var(--border);border-radius:8px;display:flex;align-items:center;justify-content:center;color:var(--muted);font-size:12px;text-align:center}

.page-layout{display:grid;grid-template-columns:1fr 320px;gap:24px}
.content-area{min-height:calc(100vh - 200px)}

.footer{background:var(--card);border-top:1px solid var(--border);padding:24px 0;margin-top:32px}
.footer-content{display:flex;justify-content:space-between;align-items:center;max-width:1200px;margin:0 auto;padding:0 16px}
.footer-nav{display:flex;gap:16px}
.footer-nav a{color:var(--muted);text-decoration:none;font-size:14px}
.footer-nav a:hover{color:var(--brand)}

/* Responsive adjustments for components */
@media (max-width: 768px) {
    .nav-menu ul{flex-direction:column;gap:8px}
    .header-content{flex-direction:column;gap:16px}
    .page-layout{grid-template-columns:1fr}
    .banner-side{position:static}
    .footer-content{flex-direction:column;gap:12px;text-align:center}
    .footer-nav{justify-content:center}
}

/* Novos estilos para página inicial expandida */
.grid-3{display:grid;grid-template-columns:repeat(3, 1fr);gap:12px}
@media (max-width:900px){.grid-3{grid-template-columns:repeat(2, 1fr)}}
@media (max-width:640px){.grid-3{grid-template-columns:1fr}}

.calc-card, .feature-card, .area-card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:16px;
  padding:14px;
  display:flex;
  flex-direction:column;
  gap:10px;
}

.calc-card h3, .feature-card h4, .area-card h4{
  margin:0;
  font-size:16px;
  color:var(--fg);
}

.calc-card p, .feature-card p{
  margin:0;
  color:var(--muted);
  font-size:13px;
  line-height:1.4;
}

.feature-card{
  text-align:center;
  align-items:center;
}

.feature-card .icon{
  font-size:24px;
  margin-bottom:4px;
}

.pill.small{
  font-size:11px;
  padding:4px 10px;
  margin-top:6px;
  align-self:flex-start;
}

.area-card ul{
  margin:0;
  padding-left:16px;
}

.area-card ul li{
  color:var(--muted);
  font-size:13px;
  margin-bottom:4px;
}

.area-card h4{
  margin-bottom:8px;
}

/* CTA melhorado */
.cta{
  display:flex;
  gap:8px;
  flex-wrap:wrap;
  margin-top:12px;
}

.cta .pill{
  background:var(--brand);
  color:#fff;
  border-color:transparent;
  font-weight:600;
}

.cta .pill:hover{
  background:var(--brand-700);
}

@media (max-width: 640px) {
    .banner-placeholder[style*="728px"]{width:100% !important;max-width:728px}
    .banner-placeholder[style*="300px"]{width:100% !important;max-width:300px}
    .cta{flex-direction:column}
    .cta .pill{text-align:center}
}