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

:root {
    --user-color: #4CAF50;
    --bot-color: #2196F3;
    --bg-color: #f5f5f5;
    --text-color: #333;
    --border-color: #ddd;
}

body.dark-mode {
    --bg-color: #1e1e1e;
    --text-color: #e0e0e0;
    --border-color: #444;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--bg-color);
    color: var(--text-color);
    transition: background 0.3s, color 0.3s;
}

.chatbot-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    max-width: 800px;
    margin: 0 auto;
    background: var(--bg-color);
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
}

/* Header */
.chatbot-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-bottom: 2px solid rgba(0, 0, 0, 0.1);
}

.header-content h1 {
    font-size: 24px;
    margin-bottom: 5px;
}

.status {
    font-size: 12px;
    opacity: 0.9;
}

.settings-btn {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    font-size: 24px;
    padding: 8px 12px;
    border-radius: 50%;
    cursor: pointer;
    transition: background 0.3s;
}

.settings-btn:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* Settings Panel */
.settings-panel {
    display: none;
    position: absolute;
    top: 70px;
    right: 20px;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    z-index: 1000;
    max-height: 500px;
    overflow-y: auto;
}

.settings-panel.active {
    display: block;
}

.settings-content {
    padding: 20px;
    min-width: 300px;
}

.settings-content h3 {
    margin-bottom: 15px;
    font-size: 18px;
}

.setting-group {
    margin-bottom: 15px;
}

.setting-group label {
    display: block;
    margin-bottom: 5px;
    font-size: 14px;
    font-weight: 600;
}

.setting-group input[type="text"],
.setting-group input[type="password"],
.setting-group input[type="color"],
.setting-group input[type="file"],
.setting-group select {
    width: 100%;
    padding: 8px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 14px;
    background: var(--bg-color);
    color: var(--text-color);
}

.setting-group small {
    display: block;
    margin-top: 3px;
    font-size: 12px;
    opacity: 0.7;
}

.btn-save, .btn-reset {
    width: 100%;
    padding: 10px;
    margin-top: 10px;
    border: none;
    border-radius: 5px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-save {
    background: #4CAF50;
    color: white;
}

.btn-save:hover {
    background: #45a049;
}

.btn-reset {
    background: #f44336;
    color: white;
}

.btn-reset:hover {
    background: #da190b;
}

/* Chat Messages */
.chatbot-messages {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.message {
    display: flex;
    flex-direction: column;
    animation: slideIn 0.3s ease-in-out;
}

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

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

.bot-message {
    align-items: flex-start;
}

.message-content {
    max-width: 70%;
    padding: 12px 15px;
    border-radius: 10px;
    word-wrap: break-word;
    line-height: 1.4;
}

.user-message .message-content {
    background: var(--user-color);
    color: white;
    border-radius: 15px 15px 5px 15px;
}

.bot-message .message-content {
    background: var(--bot-color);
    color: white;
    border-radius: 15px 15px 15px 5px;
}

.message-time {
    font-size: 12px;
    opacity: 0.6;
    margin-top: 5px;
    padding: 0 5px;
}

/* Typing Indicator */
.typing-indicator {
    display: none;
    padding: 10px 20px;
}

.typing-indicator.active {
    display: flex;
    gap: 5px;
}

.typing-indicator span {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--bot-color);
    animation: typing 1.4s infinite;
}

.typing-indicator span:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-indicator span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes typing {
    0%, 60%, 100% {
        opacity: 0.5;
        transform: translateY(0);
    }
    30% {
        opacity: 1;
        transform: translateY(-10px);
    }
}

/* Search Modal */
.search-modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    animation: fadeIn 0.3s ease-in-out;
}

.search-modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.search-modal-content {
    background: var(--bg-color);
    padding: 30px;
    border-radius: 15px;
    max-width: 800px;
    width: 90%;
    height: 91vh;
    overflow-y: auto;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    position: relative;
}

.close-search {
    position: absolute;
    right: 15px;
    top: 15px;
    font-size: 28px;
    font-weight: bold;
    border: none;
    background: transparent;
    color: var(--text-color);
    cursor: pointer;
    transition: color 0.3s;
}

.close-search:hover {
    color: #f44336;
}

.search-modal-content h3 {
    margin-bottom: 20px;
    color: var(--text-color);
    font-size: 18px;
}

.search-container {
    width: 100%;
}

.gcse-searchbox {
    margin-bottom: 15px;
}

.gcse-searchresults {
    min-height: 300px;
}

/* Input Area */
.chatbot-input-area {
    display: flex;
    gap: 10px;
    padding: 15px 20px;
    background: var(--bg-color);
    border-top: 1px solid var(--border-color);
}

#userInput {
    flex: 1;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 25px;
    font-size: 14px;
    background: var(--bg-color);
    color: var(--text-color);
    outline: none;
    transition: border-color 0.3s;
}

#userInput:focus {
    border-color: #667eea;
}

.send-btn, .download-btn {
    padding: 12px 20px;
    border: none;
    border-radius: 25px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.send-btn:hover, .download-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.download-btn {
    padding: 12px 15px;
}

/* Scrollbar */
.chatbot-messages::-webkit-scrollbar {
    width: 8px;
}

.chatbot-messages::-webkit-scrollbar-track {
    background: var(--bg-color);
}

.chatbot-messages::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

.chatbot-messages::-webkit-scrollbar-thumb:hover {
    background: #999;
}

.search-modal-content::-webkit-scrollbar {
    width: 8px;
}

.search-modal-content::-webkit-scrollbar-track {
    background: var(--bg-color);
}

.search-modal-content::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

/* Responsive */
@media (max-width: 600px) {
    .chatbot-container {
        max-width: 100%;
        height: 100vh;
        border-radius: 0;
    }

    .message-content {
        max-width: 85%;
    }

    .settings-panel {
        right: 0;
        left: 0;
        border-radius: 0;
        top: auto;
        bottom: 0;
        max-height: 70vh;
    }

    .settings-content {
        min-width: auto;
    }

    .search-modal-content {
        width: 95%;
        padding: 20px;
    }
}