/* 1. Global Reset & Typography */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333333;
    background-color: #f8fafc;
}

/* 2. Header & Responsive Navigation */
header {
    background-color: #0f172a;
    color: #ffffff;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

header h1 {
    font-size: 1.5rem;
}

nav a {
    color: #ffffff;
    text-decoration: none;
    margin-left: 15px;
    font-weight: 600;
    transition: color 0.2s ease;
}

nav a:hover {
    color: #38bdf8;
}

/* 3. Main Content Container */
main {
    max-width: 900px;
    margin: 2rem auto;
    padding: 1.5rem;
    background-color: #ffffff;
    border-radius: 8px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

/* 4. Form Styling */
form div {
    margin-bottom: 1rem;
}

input[type="text"],
input[type="email"],
textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #cbd5e1;
    border-radius: 6px;
    font-size: 1rem;
}

button[type="submit"] {
    background-color: #0284c7;
    color: #ffffff;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    cursor: pointer;
    font-weight: bold;
}

button[type="submit"]:hover {
    background-color: #0369a1;
}

/* 5. Footer */
footer {
    text-align: center;
    padding: 1.5rem;
    background-color: #1e293b;
    color: #94a3b8;
    margin-top: 3rem;
}

/* 6. Mobile Responsiveness (Media Queries) */
@media (max-width: 600px) {
    header {
        flex-direction: column;
        text-align: center;
    }

    nav {
        margin-top: 1rem;
    }

    nav a {
        display: inline-block;
        margin: 5px 8px;
    }

    main {
        margin: 1rem;
        padding: 1rem;
    }
}