body {
    margin: 0;
    font-family: system-ui, sans-serif;
    background-color: #ffffff;
}

/* HEADER */
.site-header {
    background: #0b1f33;
    color: white;
    padding: 15px 30px;
}

.site-header a {
    color: white;
    text-decoration: none;
}

/* HERO */
.hero {
    position: relative;
    background-size: cover;
    background-position: center;
    height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: rgba(10, 20, 40, 0.45);
}

.hero-content {
    position: relative;
    z-index: 10;
    color: white;
}

/* CALCULATOR */
.calculator-box {
    margin-top: 30px;
    background: rgba(255,255,255,0.15);
    padding: 20px;
    border-radius: 12px;
    backdrop-filter: blur(8px);
}

/* FOOTER */
.site-footer {
    background: #0b1f33;
    color: #fff;
    padding: 40px;
}

.footer-watermark {
    opacity: 0.08;
    width: 200px;
    margin-top: 20px;
}