* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.chat-container {
    width: 100%;
    max-width: 600px;
    height: 80vh;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 20px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.3);
}

.chat-header {
    padding: 20px;
    text-align: center;
    background: rgba(255, 255, 255, 0.05);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.chat-header h1 {
    color: #fff;
    font-size: 1.5rem;
    margin-bottom: 5px;
}

.chat-header p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.85rem;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.message {
    display: flex;
    max-width: 85%;
    animation: fadeIn 0.3s ease;
}

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

.message.user {
    align-self: flex-end;
}

.message.agent {
    align-self: flex-start;
}

.message-content {
    padding: 12px 18px;
    border-radius: 18px;
    line-height: 1.5;
    font-size: 0.95rem;
}

.message.user .message-content {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    border-bottom-right-radius: 4px;
}

.message.agent .message-content {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    border-bottom-left-radius: 4px;
}

.message.loading .message-content {
    color: rgba(255, 255, 255, 0.5);
}

.chat-input {
    display: flex;
    padding: 15px;
    gap: 10px;
    background: rgba(255, 255, 255, 0.05);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.chat-input input {
    flex: 1;
    padding: 12px 18px;
    border: none;
    border-radius: 25px;
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    font-size: 0.95rem;
    outline: none;
    transition: background 0.3s;
}

.chat-input input::placeholder {
    color: rgba(255, 255, 255, 0.4);
}

.chat-input input:focus {
    background: rgba(255, 255, 255, 0.15);
}

.chat-input button {
    padding: 12px 24px;
    border: none;
    border-radius: 25px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.chat-input button:hover {
    transform: scale(1.02);
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.4);
}

.chat-input button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* Scrollbar styling */
.chat-messages::-webkit-scrollbar {
    width: 6px;
}

.chat-messages::-webkit-scrollbar-track {
    background: transparent;
}

.chat-messages::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 3px;
}