:root {
    --primary-color: #003399; /* A deep, trustworthy blue, like the EU flag */
    --accent-color: #FFCC00;  /* A vibrant gold/yellow for accents */
    --dark-color: #212529;
    --light-color: #f8f9fa;
    --font-family: 'Poppins', sans-serif;
}

body {
    font-family: var(--font-family);
    color: var(--dark-color);
}

/* Navbar Styling */
.navbar {
    transition: background-color 0.3s ease-in-out;
}

.navbar.scrolled {
    background-color: rgba(0, 21, 64, 0.95); /* Darker blue on scroll */
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.navbar-brand img {
    transition: transform 0.3s ease;
}

.navbar-brand img:hover {
    transform: scale(1.05);
}

.navbar-title {
    color: var(--primary-color);
    font-size: 1.5rem;
}

.text-accent {
    color: var(--accent-color);
}

.nav-link {
    font-weight: 600;
    transition: color 0.3s;
}

.nav-link:hover {
    color: var(--accent-color);
}

/* Hero Section */
.hero-section {
    background: linear-gradient(rgba(0, 33, 99, 0.8), rgba(0, 33, 99, 0.8)), url('https://www.transparenttextures.com/patterns/clean-gray-paper.png');
    color: white;
    padding: 12rem 0;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-section .display-4 {
    font-weight: 700;
}

/* Buttons */
.btn-primary {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
    color: var(--dark-color);
    font-weight: 600;
    padding: 12px 30px;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    background-color: #ffde59;
    border-color: #ffde59;
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(255, 204, 0, 0.4);
}

.btn-outline-primary {
    border-color: var(--primary-color);
    color: var(--primary-color);
    font-weight: 600;
    padding: 12px 30px;
}

.btn-outline-primary:hover {
    background-color: var(--primary-color);
    color: white;
}

.btn-secondary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    font-weight: 600;
    padding: 12px 30px;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    background-color: #002266; /* Darker blue */
    border-color: #002266;
}

/* Sections */
section {
    padding: 6rem 0;
}

h2 {
    font-weight: 700;
}

/* Features Section */
#features .card {
    border: none;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

#features .card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.1);
}

#features .card-title {
    font-weight: 600;
}

/* Pricing Section */
#pricing .card {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

#pricing .card:hover {
     transform: scale(1.02);
     box-shadow: 0 10px 30px rgba(0,0,0,0.12);
}

#pricing .card-header {
    background-color: var(--light-color);
    border-bottom: 1px solid #dee2e6;
    font-size: 1.25rem;
    font-weight: 600;
}

#pricing .border-primary .card-header {
    font-weight: 700;
}

/* FAQ Section */
.accordion-button:focus {
    box-shadow: none;
    border-color: rgba(0,0,0,.125);
}

.accordion-button:not(.collapsed) {
    color: var(--primary-color);
    background-color: #e7f1ff;
    font-weight: 600;
}

/* Footer */
footer {
    background-color: var(--dark-color);
}

footer a {
    text-decoration: none;
    transition: color 0.3s;
}

footer a:hover {
    color: var(--accent-color);
}

/* Back to Top Button */
.back-to-top-btn {
    position: fixed;
    bottom: 20px;
    right: 20px;
    display: none;
    z-index: 1000;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    font-size: 1.5rem;
    line-height: 1;
}