/* Basic Reset & Setup */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --primary-color: #0d2c4f; /* Deep Blue */
    --secondary-color: #2c5d63; /* Teal Green */
    --text-color: #333;
    --bg-color: #f4f4f4;
    --light-color: #ffffff;
}

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
}

.container {
    max-width: 1100px;
    margin: auto;
    overflow: hidden;
    padding: 0 20px;
}

/* Header & Navigation */
header {
    background: var(--primary-color);
    color: var(--light-color);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

header h1 {
    float: left;
}

header nav {
    float: right;
}

header ul {
    list-style: none;
}

header ul li {
    display: inline;
    margin-left: 20px;
}

header a {
    color: var(--light-color);
    text-decoration: none;
    font-weight: bold;
}

header a.active, header a:hover {
    color: var(--secondary-color);
}

/* Hero Section */
.hero {
    background: var(--secondary-color);
    color: var(--light-color);
    height: 300px;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
}

/* General Content & Images */
.intro, .content-page {
    padding: 40px 0;
}

.placeholder-img {
    max-width: 100%;
    height: auto;
    margin-top: 20px;
    border: 1px solid #ddd;
}

.card {
    background: var(--light-color);
    border: 1px solid #ddd;
    border-radius: 5px;
    padding: 20px;
    margin-bottom: 20px;
}

/* Form Styling */
.contact-form .form-group {
    margin-bottom: 15px;
}

.contact-form label {
    display: block;
    margin-bottom: 5px;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
}

.btn {
    display: inline-block;
    background: var(--primary-color);
    color: var(--light-color);
    padding: 10px 20px;
    border: none;
    cursor: pointer;
    border-radius: 5px;
}

.btn:hover {
    background: var(--secondary-color);
}

/* Footer */
footer {
    text-align: center;
    padding: 20px;
    background: var(--text-color);
    color: var(--light-color);
}

/* --- Responsive Design --- */

/* Tablet Layout */
@media (max-width: 768px) {
    header h1, header nav {
        float: none;
        text-align: center;
    }
    
    header nav ul li {
        display: block;
        padding: 5px;
    }

    .hero {
        height: 250px;
    }
}

/* Mobile Layout */
@media (max-width: 500px) {
    header ul {
        padding-top: 10px;
    }

    header ul li {
        margin-left: 0;
    }
    
    .hero {
        height: 200px;
    }

    .hero h2 {
        font-size: 1.5rem;
    }
}