body {
    margin: 0;
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: #333;
}

header {
    background: #004aad;
    color: #fff;
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    margin: 0;
    padding: 0;
}

nav ul li {
    margin: 0 1rem;
}

nav ul li a {
    color: #fff;
    text-decoration: none;
    font-weight: bold;
    transition: color 0.3s;
}

nav ul li a:hover, nav ul li a.active {
    color: #ffd700;
}

.hero {
    background: url('hero-bg.jpg') no-repeat center center/cover;
    text-align: center;
    padding: 5rem 1rem;
    color: #fff;
    animation: fadeIn 1s ease-in;
}

.hero h1 {
    font-size: 3rem;
    margin: 0;
}

.hero p {
    font-size: 1.2rem;
}

.btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: #004aad;
    color: #fff;
    text-decoration: none;
    border-radius: 5px;
    margin-top: 1rem;
    transition: background 0.3s;
}

.btn:hover {
    background: #003087;
}

.content {
    max-width: 800px;
    margin: 2rem auto;
    padding: 0 1rem;
    animation: slideIn 0.5s ease-out;
}

.share {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin: 1rem 0;
}

.share a {
    color: #004aad;
    font-size: 1.5rem;
    transition: color 0.3s;
}

.share a:hover {
    color: #003087;
}

.author {
    background: #f9f9f9;
    padding: 1rem;
    border-radius: 5px;
    margin: 1rem 0;
    text-align: center;
}

.author-img {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    margin: 0.5rem auto;
}

form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    max-width: 500px;
    margin: 1rem auto;
}

form label {
    font-weight: bold;
}

form input, form textarea {
    padding: 0.5rem;
    border: 1px solid #ccc;
    border-radius: 5px;
    font-size: 1rem;
}

form textarea {
    resize: vertical;
    min-height: 100px;
}

form button {
    cursor: pointer;
}

.popup {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    justify-content: center;
    align-items: center;
    z-index: 2000;
}

.popup-content {
    background: #fff;
    padding: 2rem;
    border-radius: 5px;
    text-align: center;
    max-width: 400px;
    animation: popIn 0.3s ease-out;
}

.close {
    position: absolute;
    top: 10px;
    right: 15px;
    font-size: 1.5rem;
    cursor: pointer;
}

footer {
    background: #004aad;
    color: #fff;
    text-align: center;
    padding: 1rem 0;
    margin-top: 2rem;
}

.footer-links a {
    color: #fff;
    text-decoration: none;
    margin: 0 0.5rem;
}

.footer-links a:hover {
    color: #ffd700;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideIn {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

@keyframes popIn {
    from { transform: scale(0.8); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}