.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    justify-content: center;
    align-items: center;
    animation: fadeIn 0.3s ease-out;
}
.modal-content {
    background: var(--nav-dark);
    padding: 2.5rem;
    border-radius: 15px;
    width: 450px;
    max-width: 90%;
    box-shadow: 0 5px 30px rgba(0, 0, 0, 0.5);
    transform: translateY(-50px);
    animation: slideUp 0.4s ease-out forwards;
    position: relative;
    transition: transform 0.4s ease-out, opacity 0.3s ease;
    overflow: hidden;
}
body.light-mode .modal-content {
    background: var(--nav-light);
    box-shadow: 0 5px 30px rgba(0, 0, 0, 0.2);
}
.close-modal {
    position: absolute;
    top: 15px;
    right: 15px;
    font-size: 1.5rem;
    cursor: pointer;
    transition: transform 0.3s, color 0.3s;
    color: var(--secondary);
    background: transparent; 
    border: none; 
    padding: 0; 
    outline: none; 
}
body.light-mode .close-modal {
    color: var(--primary);
}
.close-modal:hover {
    transform: rotate(90deg);
    color: var(--secondary);
}
body.light-mode .close-modal:hover {
    color: var(--primary);
}
.modal h2 {
    margin-top: 0;
    margin-bottom: 1.5rem;
    text-align: center;
    color: var(--secondary);
}
body.light-mode .modal h2 {
    color: var(--primary);
}
.form-group {
    margin-bottom: 1.5rem;
    text-align: left;
    position: relative;
}
.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--secondary);
}

body.light-mode .form-group label {
    color: var(--primary);
}
.form-group input {
    width: 100%;
    padding: 0.8rem 1rem;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-dark);
    font-size: 1rem;
    transition: all 0.3s ease;
}
body.light-mode .form-group input {
    border: 1px solid rgba(0, 0, 0, 0.2);
    background: rgba(0, 0, 0, 0.05);
    color: var(--text-light);
}
.form-group input:focus {
    outline: none;
    border-color: var(--secondary);
    box-shadow: 0 0 0 2px rgba(0, 204, 255, 0.3);
    transform: scale(1.02);
}
body.light-mode .form-group input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(0, 102, 255, 0.3);
    transform: scale(1.02);
}
.form-group input:focus-visible {
    transform: scale(1.05);
    transition: transform 0.3s ease-in-out;
}
.form-group input::placeholder {
    color: var(--text-light);
    opacity: 0.8;
}
body.light-mode .form-group input::placeholder {
    color: var(--text-dark);
}
.auth-button {
    padding: 0.8rem 2rem;
    border-radius: 25px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s;
    font-size: 1.1rem;
    border: none;
    outline: none;
    position: relative;
}
.login {
    background: transparent;
    border: 2px solid var(--secondary);
    color: var(--text-dark);
}
.signup {
    background: linear-gradient(45deg, var(--primary), var(--secondary));
    color: white;
}
body.light-mode .login {
    border-color: var(--primary);
    color: var(--text-light);
}
body.light-mode .signup {
    background: linear-gradient(45deg, var(--primary-light), var(--secondary-light));
}
.auth-button:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    animation: buttonHover 0.3s ease-out forwards;
}
@keyframes buttonHover {
    0% {
        transform: translateY(0);
    }
    100% {
        transform: translateY(-6px);
        box-shadow: 0 12px 16px rgba(0, 0, 0, 0.3);
    }
}
#loginForm,
#signupForm {
    margin-right: 25px;
}
:focus-visible {
    outline: 3px solid var(--primary);
    outline-offset: 2px;
}
@media (max-width: 768px) {
    .modal-content {
        width: 85%;
        padding: 2rem;
    }

    .auth-button {
        padding: 0.7rem 1.5rem;
        font-size: 1rem;
    }

    .form-group input {
        padding: 1rem;
    }
}
@keyframes fadeIn {
    0% {
        opacity: 0;
    }
    100% {
        opacity: 1;
    }
}
@keyframes slideUp {
    0% {
        transform: translateY(50px);
    }
    100% {
        transform: translateY(0);
    }
}