/* Base */
body {
    margin: 0;
    background: #0d0d0d;
    color: white;
    font-family: Arial, sans-serif;
}

/* ---------------------------
   Header & Navigation
---------------------------- */
header {
    background: #1f1f1f;
    padding: 15px 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.4);
    position: sticky;
    top: 0;
    z-index: 1000; 
}

.nav-container {
    max-width: 1200px;
    margin: auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
}

.logo {
    font-size: 22px;
    font-weight: bold;
    color: #fff;
    text-decoration: none;
}

.links {
    display: flex;
    gap: 20px;
}

.links a {
    color: #e0e0e0;
    text-decoration: none;
    font-size: 16px;
    font-weight: 500;
    padding: 5px 10px;
    transition: color 0.2s, background 0.2s;
    border-radius: 4px;
}

.links a:hover {
    color: #8ab4f8;
    background: rgba(255, 255, 255, 0.05);
}


/* Contact card */
.contact-box {
    max-width: 550px;
    margin: 70px auto;
    padding: 30px;
    background: #1a1a1a;
    border-radius: 12px;
    box-shadow: 0 0 20px #000;
}

.contact-box h2 {
    margin-bottom: 10px;
}

.contact-box p {
    margin-bottom: 20px;
    opacity: 0.8;
}

/* Inputs */
.contact-box label {
    display: block;
    margin-top: 15px;
}

.contact-box input,
.contact-box textarea {
    width: 100%;
    padding: 12px;
    margin-top: 6px;
    background: #111;
    border: 1px solid #333;
    border-radius: 6px;
    color: white;
    font-size: 16px;
}

/* Lock textarea size */
.contact-box textarea {
    resize: none;
}

.contact-box input:focus,
.contact-box textarea:focus {
    border-color: #4a90e2;
    outline: none;
}

/* Button */
.contact-box button {
    margin-top: 25px;
    padding: 15px;
    background: #4a90e2;
    border: none;
    border-radius: 6px;
    width: 100%;
    font-size: 18px;
    color: white;
    cursor: pointer;
    transition: 0.2s;
}

.contact-box button:hover {
    background: #3b78ba;
}

/* Footer */
footer {
    text-align: center;
    padding: 25px;
    margin-top: 60px;
    color: #888;
}
/* Responsive */
@media (max-width: 600px) {
    .nav-container {
        flex-direction: column;
        gap: 10px;
    }

    .box {
        padding: 20px;
    }

    .file-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 5px;
    }

    model-viewer {
        height: 300px;
    }
}