:root {
    --primary: #2563eb;
    --dark: #0f172a;
    --light: #f8fafc;
    --white: #ffffff;
    --whatsapp: #22c55e;
}

html { scroll-behavior: smooth; }
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Inter', sans-serif; background: var(--light); color: var(--dark); line-height: 1.6; overflow-x: hidden; }

/* Navegação Premium */
nav {
    display: flex; justify-content: space-between; align-items: center;
    padding: 1.2rem 8%; background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px); color: var(--white);
    position: sticky; top: 0; z-index: 1000;
    transition: all 0.4s ease; border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
.logo a { display: flex; align-items: center; gap: 15px; text-decoration: none; color: var(--white); font-weight: 900; font-size: 1.5rem; letter-spacing: 1.5px; }
.logo span span { color: var(--primary); text-shadow: 0 0 10px rgba(37, 99, 235, 0.5); }
.nav-logo { height: 50px; width: auto; }

.nav-links { display: flex; list-style: none; gap: 35px; }
.nav-links a { text-decoration: none; color: var(--white); font-weight: 600; font-size: 1.05rem; position: relative; padding: 5px 0; }
.nav-links a::after { content: ''; position: absolute; width: 0; height: 3px; bottom: 0; left: 0; background: var(--primary); transition: 0.3s; }
.nav-links a:hover::after { width: 100%; }
.nav-links a:hover { color: var(--primary); }

/* Hero Section */
.hero {
    height: 75vh; display: flex; flex-direction: column; justify-content: center; align-items: center;
    text-align: center; background: linear-gradient(rgba(15, 23, 42, 0.8), rgba(15, 23, 42, 0.8)), url('../img/hero-bg.jpg') center/cover;
    color: var(--white); padding: 0 10%;
}
.hero h1 { font-size: 3.2rem; font-weight: 800; margin-bottom: 20px; }

/* Botão de Orçamento Estilizado */
.btn-cta {
    display: inline-block; background-color: var(--whatsapp); color: var(--white);
    padding: 16px 40px; border-radius: 50px; text-decoration: none;
    font-weight: 700; font-size: 1.1rem; transition: 0.3s ease;
    margin-top: 30px; box-shadow: 0 10px 20px rgba(34, 197, 94, 0.3);
}
.btn-cta:hover { transform: translateY(-3px); box-shadow: 0 15px 25px rgba(34, 197, 94, 0.4); }

/* Carrossel */
.carousel-container { display: flex; overflow-x: auto; gap: 25px; padding: 40px 20px; scrollbar-width: none; }
.system-card { min-width: 320px; background: var(--white); border-radius: 16px; padding: 20px; box-shadow: 0 10px 15px rgba(0,0,0,0.05); transition: 0.3s; }
.system-card:hover { transform: translateY(-10px); }
.card-img { width: 100%; height: 180px; overflow: hidden; border-radius: 12px; margin-bottom: 15px; }
.card-img img { width: 100%; height: 100%; object-fit: cover; }

/* Quem Somos */
.about-section { padding: 100px 10%; background: var(--white); text-align: center; display: flex; justify-content: center; }
.about-content { max-width: 900px; }
.about-section h2::after { content: ''; display: block; width: 60px; height: 4px; background: var(--primary); margin: 15px auto; }
.about-content p { font-size: 1.25rem; color: #475569; text-align: justify; }

/* Demo Grid */
.demo-section { padding: 80px 8%; background: #f1f5f9; text-align: center; }
.demo-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; margin-top: 40px; }
.demo-card { background: var(--white); padding: 30px; border-radius: 20px; border-top: 6px solid var(--primary); transition: 0.3s; display: flex; flex-direction: column; justify-content: space-between; }
.demo-card:hover { transform: translateY(-5px); box-shadow: 0 15px 30px rgba(0,0,0,0.1); }
.credentials { background: #f8fafc; padding: 15px; border-radius: 8px; margin: 20px 0; text-align: left; border-left: 4px solid var(--primary); }
.btn-demo { display: block; padding: 12px; background: var(--dark); color: var(--white); text-decoration: none; border-radius: 8px; font-weight: 700; }
.btn-demo:hover { background: var(--primary); }

/* Tech Section */
.tech-section { padding: 80px 10%; background: var(--white); text-align: center; }
.tech-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 40px; }
.tech-item i { font-size: 3.5rem; color: var(--dark); transition: 0.3s; }
.tech-item:hover i { color: var(--primary); transform: scale(1.15); }

/* Footer & Floating WA */
.whatsapp-fixed { position: fixed; bottom: 30px; right: 30px; background: var(--whatsapp); color: #fff; width: 65px; height: 65px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 35px; z-index: 1001; }
footer { background: var(--dark); color: #fff; padding: 50px; text-align: center; }
.social-links a { color: #fff; font-size: 2rem; margin: 0 15px; transition: 0.3s; }