body {
    background-color: #1a1a2e;
    color: #4dd4ac;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    background-image: linear-gradient(45deg, #1a1a2e 0%, #16213e 100%);
}

.chatbot-container, .auth-container {
    background-color: rgba(26, 26, 46, 0.95);
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    width: 90%;
    max-width: 700px;
    display: none;
    border: 1px solid rgba(77, 212, 172, 0.1);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

#chat {
    height: 300px;
    overflow: auto;
    border: 1px solid #4dd4ac;
    padding: 20px;
    background-color: rgba(26, 26, 46, 0.8);
    margin-bottom: 25px;
    border-radius: 10px;
    font-size: 16px;
    line-height: 1.6;
}

.form-control {
    margin-bottom: 20px;
    background-color: rgba(26, 26, 46, 0.8);
    color: #4dd4ac;
    border: 1px solid #4dd4ac;
    padding: 12px;
    border-radius: 8px;
    width: 100%;
    font-size: 16px;
    transition: all 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: #4dd4ac;
    box-shadow: 0 0 10px rgba(77, 212, 172, 0.2);
}

.btn-submit, .btn-auth {
    width: 100%;
    padding: 15px;
    background-color: #4dd4ac;
    color: #1a1a2e;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.btn-submit:hover, .btn-auth:hover {
    background-color: #3ac29a;
    transform: translateY(-2px);
}

.btn-submit:disabled {
    background-color: #2a5a4c;
    cursor: not-allowed;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 20px auto;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

h2, h3 {
    color: #4dd4ac;
    margin-bottom: 25px;
    text-align: center;
    font-weight: 600;
}

a {
    color: #4dd4ac;
    text-decoration: none;
    transition: all 0.3s ease;
}

a:hover {
    color: #3ac29a;
}

p {
    text-align: center;
    margin-top: 20px;
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: rgba(26, 26, 46, 0.8);
}

::-webkit-scrollbar-thumb {
    background: #4dd4ac;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #3ac29a;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

.chatbot-container, .auth-container {
    animation: fadeIn 0.5s ease-out;
}