/* Navigation Bar */
.main-nav {
    background-color: rgba(18, 18, 18, 0.85);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid #333;
    padding: 0 2rem;
    position: sticky;
    top: 0;
    width: 100%;
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.main-nav .logo {
    color: #fff;
    font-size: 1.5rem;
    font-weight: bold;
    text-decoration: none;
}

.nav-links {
    list-style: none;
    display: flex;
    margin: 0;
    padding: 0;
}

.nav-links li {
    margin-left: 25px;
}

.nav-links a {
    color: #e0e0e0;
    text-decoration: none;
    font-size: 1rem;
    padding: 10px 0;
    position: relative;
    transition: color 0.3s ease;
}

.nav-links a:hover {
    color: #007bff;
}

.nav-links a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 0;
    background-color: #007bff;
    transition: width 0.3s ease;
}

.nav-links a:hover::after {
    width: 100%;
}

.login-btn {
    background-color: #007bff;
    color: #fff;
    padding: 10px 20px;
    border-radius: 5px;
    border: none;
    cursor: pointer;
    font-weight: bold;
    transition: background-color 0.3s ease;
}

.login-btn:hover {
    background-color: #0056b3;
}

/* Modern Modal Styles */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 2000;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.modal-overlay.active {
    display: flex;
    opacity: 1;
}

.modal-content {
    background: #1e1e1e;
    border: 1px solid #333;
    padding: 2.5rem;
    border-radius: 15px;
    width: 90%;
    max-width: 420px;
    text-align: center;
    position: relative;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    transform: scale(0.95);
    transition: transform 0.3s ease;
}

.modal-overlay.active .modal-content {
    transform: scale(1);
}

.modal-close {
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 2rem;
    color: #777;
    cursor: pointer;
    line-height: 1;
    transition: color 0.3s ease, transform 0.3s ease;
}

.modal-close:hover {
    color: #fff;
    transform: rotate(90deg);
}

.modal-content h2 {
    margin-bottom: 1rem;
    font-size: 2rem;
    font-weight: 600;
    color: #fff;
}

.modal-content .modal-subtitle {
    color: #aaa;
    margin-bottom: 2rem;
}

.form-group {
    margin-bottom: 1.5rem;
    text-align: left;
    position: relative;
}

.form-group .icon {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: #777;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    color: #ccc;
}

.form-group input {
    width: 100%;
    padding: 12px 12px 12px 45px;
    background-color: #2a2a2a;
    border: 1px solid #444;
    border-radius: 8px;
    color: #fff;
    font-size: 1rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: #007bff;
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.2);
}

.modal-content .btn {
    width: 100%;
    margin-top: 1rem;
    padding: 12px;
    font-size: 1.1rem;
}

.modal-footer {
    margin-top: 1.5rem;
    font-size: 0.9rem;
}

.modal-footer a {
    color: #007bff;
    text-decoration: none;
    font-weight: bold;
}

.modal-footer a:hover {
    text-decoration: underline;
}