:root {
    --primary-color: red;
    --secondary-color:#fdf5e6;
    --accent-color: #ff6b6b;
    --text-color: #333;
    --light-text: #757575;
    --border-color: #e0e0e0;
    --message-bg: #fdf5e6;
    --bot-message-bg: #fff;
    --user-message-bg: #efeffc;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: #fff;
    color: var(--text-color);
    line-height: 1.6;
}

.chat-container {
    max-width: 900px;
    margin: 40px auto;
    border-radius: 12px;
    box-shadow: var(--shadow);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: calc(100vh - 80px);
}

.chat-header {
    padding: 20px;
    background-color: #fff;
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.chat-header h1 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
}

.messages-container {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    background-color: var(--secondary-color);
}

.message {
    max-width: 85%;
    padding: 16px;
    border-radius: 12px;
    animation: fadeIn 0.3s ease;
}

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

.bot-message {
    align-self: flex-start;
    background: var(--bot-message-bg);
    border: 1px solid var(--border-color);
}

.user-message {
    align-self: flex-end;
    background: var(--user-message-bg);
    color: var(--text-color);
}

.message-content {
    margin-bottom: 8px;
}

.citation {
    display: inline-block;
    padding: 0 6px;
    margin-right: 4px;
    height: 20px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 4px;
    font-size: 12px;
}

.source-list {
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
    font-size: 14px;
}

.source-list h4 {
    margin-bottom: 8px;
    color: var(--primary-color);
}

.source-item {
    margin-bottom: 8px;
    padding-left: 8px;
    border-left: 2px solid var(--primary-color);
}

.input-container {
    display: flex;
    padding: 16px;
    background-color: #fff;
    border-top: 1px solid var(--border-color);
    gap: 10px;
}

#user-input {
    flex: 1;
    padding: 12px 16px;
    border-radius: 24px;
    border: 1px solid var(--border-color);
    font-family: 'Inter', sans-serif;
    font-size: 16px;
    resize: none;
    height: 50px;
    outline: none;
    transition: border-color 0.2s;
}

#user-input:focus {
    border-color: var(--primary-color);
}

#send-button {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: none;
    background-color: var(--primary-color);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s;
}

#send-button:hover {
    background-color: #4038c7;
}

.suggested-queries {
    padding: 12px;
    background-color: #fff;
    border-top: 1px solid var(--border-color);
}

.suggested-queries h3 {
    font-size: 12px;
    color: var(--light-text);
    margin-bottom: 12px;
}

.query-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.query-btn {
    padding: 6px 12px;
    background-color: var(--secondary-color);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    font-size: 12px;
    cursor: pointer;
    transition: all 0.2s;
}

.query-btn:hover {
    background-color: #e8e8ec;
    border-color: #ccc;
}

.loading-indicator {
    display: flex;
    gap: 8px;
    align-items: center;
    padding: 8px 16px;
    color: var(--light-text);
}

.loading-dot {
    width: 8px;
    height: 8px;
    background-color: var(--primary-color);
    border-radius: 50%;
    opacity: 0.6;
    animation: loadingPulse 1.5s infinite ease-in-out;
}

.loading-dot:nth-child(2) {
    animation-delay: 0.2s;
}

.loading-dot:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes loadingPulse {
    0%, 100% { opacity: 0.6; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.2); }
}

@media (max-width: 768px) {
    .chat-container {
        margin: 0;
        height: 100vh;
        border-radius: 0;
    }
    
    .message {
        max-width: 90%;
    }
}

#upload-button {
    padding: 10px 16px;
    background-color: var(--secondary-color);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.2s ease-in-out;
}

#upload-button:hover {
    background-color: #e8e8ec;
}


.footer {
    text-align: center;
    padding: 12px;
    background-color: #f5f5f7;
    color: #757575;
    font-size: 14px;
    border-top: 1px solid var(--border-color);
}