:root {
    --primary: #0077b6;
    --secondary: #48cae4;
    --black: #333;
    --white: #fff;
    --box-shadow: 0 .5rem 1rem rgba(0, 0, 0, 0.1);
}

/* HEADER */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--white);
    box-shadow: var(--box-shadow);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 7%;
    height: 70px;
}

/* LOGO */
.header .logo {
    display: flex;
    align-items: center;
    font-size: 2rem;
    font-weight: bolder;
    color: var(--black);
    text-decoration: none;
}

.header .logo img {
    height: 50px;
    margin-right: 10px;
}

/* NAVBAR */
.header .navbar ul {
    display: flex;
    align-items: center;
    list-style: none;
    margin: 0;
    padding: 0;
}

.header .navbar li {
    margin: 0 1rem;
    display: flex;
    align-items: center;
}

.header .navbar a {
    font-size: 1.6rem;
    color: var(--black);
    padding: 0.7rem 1.5rem; /* Matching padding with button */
    text-decoration: none;
    transition: color 0.3s ease;
    display: flex;
    align-items: center;
}

.header .navbar a:hover {
    color: var(--primary);
}

/* BUTTON STYLE */
.header .navbar .btn {
    background: var(--primary);
    color: var(--white);
    padding: 0.7rem 1.5rem;
    border-radius: .5rem;
    font-size: 1.6rem;
    text-decoration: none;
    font-weight: bold;
    transition: background 0.3s ease, transform 0.2s ease;
}

.header .navbar .btn:hover {
    background: var(--secondary);
    transform: scale(1.05);
}

/* MENU BUTTON (HAMBURGER) */
#menu-btn {
    display: none;
    font-size: 2.5rem;
    cursor: pointer;
    color: var(--black);
}

/* ACTIVE LINK */
.header .navbar a.active {
    color: var(--primary);
    font-weight: bold;
}

.header .navbar .btn.active {
    color: var(--white);
}

/* MOBILE NAVBAR */
@media (max-width: 768px) {
    #menu-btn {
        display: block;
    }

    .header .navbar {
        position: absolute;
        top: 70px;
        left: -100%;
        width: 100%;
        background: var(--white);
        box-shadow: var(--box-shadow);
        transition: left 0.3s ease;
    }

    .header .navbar.active {
        left: 0;
    }

    .header .navbar ul {
        flex-direction: column;
        text-align: center;
        padding: 1rem 0;
    }

    .header .navbar li {
        margin: 1rem 0;
    }
}