/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: #f5f5f5;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Chat Container */
.chat-container {
    width: 100%;
    max-width: 400px;
    height: 600px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Header */
.chat-header {
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    color: white;
    padding: 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.header-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    padding: 8px;
}

.header-text h2 {
    font-size: 18px;
    font-weight: 600;
}

.header-text span {
    font-size: 12px;
    opacity: 0.8;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Assistant Dropdown */
.assistant-dropdown {
    padding: 6px 12px;
    border-radius: 6px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    background: rgba(255, 255, 255, 0.15);
    color: white;
    font-size: 13px;
    cursor: pointer;
    outline: none;
}

.assistant-dropdown option {
    background: #1e40af;
    color: white;
}

.close-btn {
    background: none;
    border: none;
    color: white;
    font-size: 20px;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
    transition: background 0.2s;
}

.close-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* Messages Area */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.message {
    display: flex;
    max-width: 80%;
}

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

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

.message-content {
    padding: 10px 14px;
    border-radius: 12px;
    font-size: 14px;
    line-height: 1.5;
}

.message.bot .message-content {
    background: #f0f4ff;
    color: #1e293b;
    border-top-left-radius: 4px;
}

.message.user .message-content {
    background: #2563eb;
    color: white;
    border-top-right-radius: 4px;
}

/* Typing Indicator */
.typing-indicator {
    display: flex;
    gap: 4px;
    padding: 10px 14px;
}

.typing-indicator span {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #94a3b8;
    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% { transform: translateY(0); }
    30% { transform: translateY(-6px); }
}

/* Input Area */
.chat-input {
    padding: 12px 16px;
    border-top: 1px solid #e2e8f0;
    display: flex;
    gap: 8px;
    align-items: flex-end;
}

#user-input {
    flex: 1;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    padding: 10px 14px;
    font-size: 14px;
    resize: none;
    outline: none;
    font-family: inherit;
    max-height: 100px;
}

#user-input:focus {
    border-color: #2563eb;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.send-btn {
    background: #2563eb;
    color: white;
    border: none;
    border-radius: 8px;
    width: 40px;
    height: 40px;
    cursor: pointer;
    font-size: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}

.send-btn:hover {
    background: #1d4ed8;
}

.send-btn:disabled {
    background: #94a3b8;
    cursor: not-allowed;
}