body {
    margin: 0;
    font-family: 'Roboto', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-color: #1ed760;
    background-image: 
        radial-gradient(at 10% 90%, hsla(355, 90%, 55%, 1) 0px, transparent 50%),
        radial-gradient(at 90% 10%, hsla(140, 90%, 55%, 1) 0px, transparent 50%),
        linear-gradient(135deg, #ff5f6d, #1ed760);
    padding: 20px;
}

.assistant-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    max-width: 500px;
    width: 100%;
}

.logo-wrapper {
    background: linear-gradient(145deg, #d5d5d5, #a0a0a0);
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0px 10px 25px rgba(0, 0, 0, 0.3), inset 0px 2px 3px rgba(255, 255, 255, 0.4), inset 0px -2px 3px rgba(0, 0, 0, 0.2);
    margin-bottom: -40px;
    position: relative;
    z-index: 2;
}

.logo {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    display: block;
    border: 3px solid #f0f0f0;
}

.message-bubble {
    width: 100%;
    text-align: center;
    padding: 60px 30px 30px 30px;
    background: linear-gradient(145deg, #8e9eab, #eef2f3);
    border: 1px solid #b0c4de;
    border-radius: 20px;
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    color: #1c2833;
    position: relative;
    z-index: 1;
}

.reset-button {
    position: absolute;
    top: 10px;
    right: 15px;
    background: none;
    border: none;
    font-size: 28px;
    cursor: pointer;
    color: #4e6783;
    transition: transform 0.3s ease-in-out, color 0.3s;
    padding: 5px;
    line-height: 1;
    z-index: 10;
}

.reset-button:hover {
    transform: rotate(-180deg);
    color: #2c3e50;
}

h1 {
    font-family: 'Orbitron', sans-serif;
    margin-top: 0;
    margin-bottom: 15px;
    color: #2c3e50;
    text-shadow: 1px 1px 2px rgba(255,255,255,0.7);
}

p {
    font-size: 1.1em;
    line-height: 1.5;
    margin: 0;
    color: #34495e;
}

#startButton {
    margin-top: 25px;
    padding: 12px 30px;
    font-size: 1.1em;
    font-family: 'Orbitron', sans-serif;
    color: white;
    background: linear-gradient(145deg, #4e6783, #34465b);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2), inset 0px 1px 2px rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
    text-shadow: 0px 1px 3px rgba(0,0,0,0.5);
}

#startButton:hover {
    background: linear-gradient(145deg, #5a7694, #3c5168);
    box-shadow: 0 6px 20px rgba(0,0,0,0.3), inset 0px 1px 2px rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

#startButton:active {
    transform: translateY(1px);
    box-shadow: 0 2px 10px rgba(0,0,0,0.3), inset 0px 1px 2px rgba(255, 255, 255, 0.2);
}

.hidden {
    display: none !important;
}

#chat-interface {
    display: flex;
    flex-direction: column;
    height: 100%;
    width: 100%;
}

#chat-messages {
    flex-grow: 1;
    overflow-y: auto;
    padding-right: 15px; /* for scrollbar */
    margin-bottom: 15px;
    display: flex;
    flex-direction: column;
    max-height: 400px; /* or adjust as needed */
    min-height: 200px;
}

.message {
    padding: 10px 15px;
    border-radius: 18px;
    margin-bottom: 10px;
    max-width: 85%;
    line-height: 1.4;
    font-size: 1em;
}

.bot-message {
    background-color: #ffffff;
    color: #2c3e50;
    align-self: flex-start;
    border-bottom-left-radius: 4px;
    animation: slideIn 0.3s ease-out;
}

.user-message {
    background-color: #4e6783;
    color: #ffffff;
    align-self: flex-end;
    border-bottom-right-radius: 4px;
    animation: slideIn 0.3s ease-out;
}

.typing-indicator {
    align-self: flex-start;
    margin-bottom: 10px;
}

.typing-indicator span {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #bdc3c7;
    margin: 0 2px;
    animation: bounce 1.4s infinite ease-in-out both;
}

.typing-indicator span:nth-child(1) { animation-delay: -0.32s; }
.typing-indicator span:nth-child(2) { animation-delay: -0.16s; }

#chat-options {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    border-top: 1px solid rgba(0,0,0,0.1);
    padding-top: 15px;
}

.option-button {
    padding: 10px 15px;
    font-size: 0.9em;
    font-family: 'Roboto', sans-serif;
    color: #34495e;
    background-color: #fff;
    border: 1px solid #bdc3c7;
    border-radius: 15px;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.option-button:hover {
    background-color: #4e6783;
    color: white;
    border-color: #4e6783;
    transform: translateY(-1px);
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes bounce {
  0%, 80%, 100% { transform: scale(0); }
  40% { transform: scale(1.0); }
}