/* ============================
   BITWER.CSS (global)
   Núcleo comum para todas as páginas
   ============================ */

:root {
    --azul-primario: #2563EB;
    --azul-escuro: #1E40AF;
    --azul-claro: #3B82F6;
    --azul-bg: #DBEAFE;
    --verde: #10B981;
    --branco: #FFFFFF;
    --cinza-claro: #F9FAFB;
    --cinza: #6B7280;
    --cinza-escuro: #374151;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

html { scroll-behavior: smooth; }
body { background-color: var(--cinza-claro); color: var(--cinza-escuro); line-height: 1.6;  margin: 0;
    padding: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;}
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 20px; }


main {
    flex: 1; /* ocupa o espaço restante, empurrando o footer para baixo */
}

/* HEADER / NAVBAR */
header {
    background: linear-gradient(135deg, var(--azul-primario) 0%, var(--azul-escuro) 100%);
    color: var(--branco);
    padding: 20px 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}
.header-container { display: flex; justify-content: space-between; align-items: center; }
.logo { display: flex; align-items: center; font-size: 24px; font-weight: 700; }
.logo i { margin-right: 10px; font-size: 28px; }

.custom-navbar .navbar-brand,
.custom-navbar .nav-link,
.custom-navbar .navbar-toggler { color: var(--branco) !important; text-align: left;}
.custom-navbar .nav-link:hover { color: var(--azul-bg) !important; }
.navbar-toggler { border: none;}
.navbar-toggler-icon {
    background-image: url("data:image/svg+xml;charset=utf8,%3Csvg viewBox='0 0 30 30' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath stroke='white' stroke-width='2' stroke-linecap='round' stroke-miterlimit='10' d='M4 7h22M4 15h22M4 23h22'/%3E%3C/svg%3E");
}

/* BOTÕES */
.btn { display: inline-block; padding: 15px 30px; text-decoration: none; font-weight: 600; transition: all 0.3s ease; }

.btn-secondary { background-color: transparent; color: var(--branco); border: 2px solid var(--branco); }
.btn-secondary:hover { background-color: var(--branco); color: var(--azul-primario); transform: translateY(-3px); box-shadow: 0 10px 20px rgba(0,0,0,0.1); }

/* HERO (comum em páginas principais) */
.hero { padding: 160px 0 100px 0; background: linear-gradient(135deg, var(--azul-primario) 0%, var(--azul-escuro) 100%); color: var(--branco); text-align: center; position: relative; overflow: hidden; }
.hero h1 {
  font-size: clamp(1.8rem, 5vw, 3.5rem);
  margin-bottom: 20px;
  font-weight: 800;
  line-height: 1.2;
}

.hero p { font-size: 1.5rem; max-width: 800px; margin: 0 auto 40px auto; }

/* SECTIONS GERAIS */
.section-title { text-align: center; margin-bottom: 60px; }
.section-title h2 { font-size: 2.5rem; color: var(--azul-escuro); margin-bottom: 20px; }
.section-title p { font-size: 1.2rem; color: var(--cinza); max-width: 700px; margin: 0 auto; }

/* PRODUCT GRID (usado em mais de uma página) */
.product-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; }
.product-card { background: var(--branco); border-radius: 15px; padding: 30px; text-align: center; box-shadow: 0 5px 15px rgba(0,0,0,0.05); transition: transform 0.3s ease; }
.product-card:hover { transform: translateY(-5px); box-shadow: 0 15px 30px rgba(0,0,0,0.1); }
.product-icon { font-size: 60px; color: var(--azul-primario); margin-bottom: 20px; }
.product-card h3 { font-size: 1.5rem; color: var(--azul-escuro); margin-bottom: 10px; }
.product-card p { color: var(--cinza); font-size: 1rem; margin-bottom: 20px; }

/* FOOTER */
footer { background: linear-gradient(135deg, var(--azul-escuro) 0%, var(--azul-primario) 100%); color: var(--branco); padding: 60px 0 30px 0; }
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit,minmax(200px,1fr)); gap: 40px; margin-bottom: 40px; }
.copyright { text-align: center; padding-top: 30px; border-top: 1px solid rgba(255,255,255,0.1); font-size: 0.9rem; color: var(--azul-bg); }

/* RESPONSIVIDADE GERAL */
@media (max-width: 768px) {
    .header-container { flex-direction: column; }
    .logo { margin-bottom: 10px; }
    nav { width: 100%; text-align: center; }
    nav ul { flex-direction: column; }
    nav ul li { margin: 10px 0; }
    .btn-mobile { display: block; }
    .page-content { padding-top: 100px; }
    .product-grid { grid-template-columns: 1fr; }
}