/* CSS Reset and Base Styles */
* { box-sizing: border-box; }
body, h1, h2, h3, p, ul, li { margin: 0; padding: 0; font-family: 'Helvetica Neue', Arial, sans-serif; }
body { 
    color: #333; 
    line-height: 1.6; 
    background-image: url('aviation-chart-bg.jpg');
    background-attachment: fixed;
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center;
}

/* Header & Navigation */
header { 
    background-color: rgba(0, 51, 102, 0.9); 
    color: #fff; 
    padding: 2.5rem 1rem; 
    text-align: center; 
    transition: background-color 0.3s ease;
}
header h1 { font-size: 2.5rem; letter-spacing: 1px; }

nav { 
    background: rgba(0, 34, 68, 0.95); 
    display: flex; 
    justify-content: center; 
    position: sticky; 
    top: 0; 
    z-index: 1000; 
    flex-wrap: wrap;
    transition: background 0.3s ease;
}
nav a { color: #fff; text-decoration: none; padding: 1rem 1.5rem; text-transform: uppercase; font-weight: bold; font-size: 0.9rem; transition: background 0.3s; }
nav a:hover { background: #00509e; }

body:hover nav {
    background: rgba(0, 34, 68, 0.6);
}

nav:hover {
    background: rgba(0, 34, 68, 0.95) !important;
}

/* Main Container & Sections */
.container { 
    max-width: 900px; 
    margin: 2rem auto; 
    padding: 0 2rem; 
    background: rgba(255, 255, 255, 0.95); 
    box-shadow: 0 0 20px rgba(0,0,0,0.3); 
    border-radius: 8px;
    transition: background 0.3s ease, box-shadow 0.3s ease;
}

body:hover .container {
    background: rgba(255, 255, 255, 0.5);
    box-shadow: 0 0 20px rgba(0,0,0,0.1);
}

.container:hover {
    background: rgba(255, 255, 255, 0.95) !important;
    box-shadow: 0 0 20px rgba(0,0,0,0.3) !important;
}

section { padding: 3rem 0; border-bottom: 1px solid #eee; }
section:last-child { border-bottom: none; }
h2 { color: #003366; margin-bottom: 1.5rem; font-size: 2rem; }
h3 { color: #00509e; margin: 1.5rem 0 0.5rem 0; font-size: 1.3rem; }
p { margin-bottom: 1rem; }
ul.list { margin-left: 2rem; margin-bottom: 1rem; }
ul.list li { margin-bottom: 0.5rem; }

/* Contact Form */
form { 
    display: flex; 
    flex-direction: column; 
    gap: 1rem; 
    max-width: 600px; 
    background: #f9f9f9; 
    padding: 2rem; 
    border-radius: 8px; 
    border: 1px solid #e0e0e0;
    transition: background 0.3s ease;
}

body:hover form {
    background: rgba(249, 249, 249, 0.7);
}

form:hover {
    background: #f9f9f9 !important;
}

label { font-weight: bold; color: #002244; }
input, textarea { padding: 0.8rem; border: 1px solid #ccc; border-radius: 4px; font-size: 1rem; width: 100%; }
textarea { resize: vertical; min-height: 120px; }
button { padding: 1rem; background-color: #003366; color: #fff; border: none; font-size: 1rem; cursor: pointer; border-radius: 4px; font-weight: bold; transition: background 0.3s; }
button:hover { background-color: #00509e; }

/* Footer */
footer { 
    text-align: center; 
    padding: 2rem; 
    background: rgba(0, 34, 68, 0.95); 
    color: #aaa; 
    font-size: 0.9rem;
    transition: background 0.3s ease;
}

body:hover footer {
    background: rgba(0, 34, 68, 0.6);
}

footer:hover {
    background: rgba(0, 34, 68, 0.95) !important;
}

/* Mobile Responsiveness */
@media (max-width: 600px) {
    nav a { padding: 0.8rem 1rem; font-size: 0.8rem; }
    .container { margin: 1rem; padding: 0 1.5rem; }
}