body{
    margin:0;
    padding:0;
    box-sizing:border-box;
}

body{
    font-family: 'Segoe UI', sans-serif;
    background:#f4f7fc;
    color:#222;
}

/* Navbar */
.custom-navbar{
    background:rgba(0,0,0,0.8);
    backdrop-filter:blur(10px);
}

.navbar-brand{
    font-size:1.4rem;
}

.nav-link{
    color:#fff !important;
    margin-left:15px;
}

/* Hero Section */
.hero-section{
    background:linear-gradient(135deg,#0f4c81,#1f8ef1);
    color:#fff;
    padding:100px 0;
}

.hero-title{
    font-size:3rem;
    font-weight:700;
    margin-bottom:20px;
}

.hero-subtitle{
    font-size:1.2rem;
    margin-bottom:30px;
}

.hero-card{
    background:#fff;
    color:#222;
    padding:40px;
    border-radius:20px;
    box-shadow:0 10px 30px rgba(0,0,0,0.2);
}

.highlight-item{
    display:flex;
    align-items:center;
    margin-top:20px;
    font-size:1.1rem;
}

.highlight-item i{
    color:#1f8ef1;
    margin-right:15px;
    font-size:1.5rem;
}

/* Sections */
.section-title{
    font-size:2.4rem;
    font-weight:700;
}

.section-subtitle{
    color:#666;
}

/* Calculator */
.calculator-card{
    background:#fff;
    padding:40px;
    border-radius:20px;
    box-shadow:0 10px 25px rgba(0,0,0,0.08);
}

.result-card{
    background:#f4f7fc;
    padding:20px;
    border-radius:15px;
    text-align:center;
}

.result-card h3{
    color:#1f8ef1;
    margin-top:10px;
}

/* Features */
.feature-card{
    background:#fff;
    padding:30px;
    border-radius:20px;
    text-align:center;
    transition:0.3s;
    box-shadow:0 5px 20px rgba(0,0,0,0.08);
    height:100%;
}

.feature-card:hover{
    transform:translateY(-10px);
}

.feature-card i{
    font-size:3rem;
    color:#1f8ef1;
    margin-bottom:20px;
}

/* Contact */
.contact-card{
    background:#fff;
    padding:40px;
    border-radius:20px;
    box-shadow:0 10px 25px rgba(0,0,0,0.08);
}

/* Footer */
.footer-section{
    background:#0f172a;
    color:#fff;
    padding:40px 0;
}

/* Buttons */
.btn-primary{
    background:#1f8ef1;
    border:none;
}

.btn-primary:hover{
    background:#0f4c81;
}

/* Responsive */
@media(max-width:768px){

    .hero-title{
        font-size:2rem;
    }

    .hero-card{
        margin-top:40px;
    }

}