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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.chat-container {
    width: 90%;
    max-width: 1200px;
    height: 90vh;
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.chat-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-title h1 {
    font-size: 1.5rem;
    margin-bottom: 5px;
}

.header-title p {
    font-size: 0.85rem;
    opacity: 0.9;
}

.api-status {
    background: rgba(255,255,255,0.2);
    padding: 8px 15px;
    border-radius: 20px;
    font-size: 0.85rem;
}

.chat-main {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    background: #f5f5f5;
}

.message {
    display: flex;
    margin-bottom: 20px;
    animation: fadeIn 0.3s ease;
}

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

.message.user {
    justify-content: flex-end;
}

.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    margin-right: 10px;
}

.message.user .avatar {
    order: 2;
    margin-right: 0;
    margin-left: 10px;
}

.message-content {
    max-width: 70%;
    background: white;
    padding: 12px 16px;
    border-radius: 15px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.message.user .message-content {
    background: #667eea;
    color: white;
}

.message-text {
    line-height: 1.5;
    word-wrap: break-word;
}

.message-time {
    font-size: 0.7rem;
    margin-top: 5px;
    opacity: 0.7;
}

.chat-input-area {
    padding: 20px;
    background: white;
    border-top: 1px solid #e0e0e0;
    display: flex;
    gap: 10px;
    align-items: flex-end;
}

textarea {
    flex: 1;
    padding: 12px;
    border: 2px solid #e0e0e0;
    border-radius: 25px;
    resize: none;
    font-family: inherit;
    font-size: 14px;
    max-height: 120px;
    transition: border-color 0.3s;
}

textarea:focus {
    outline: none;
    border-color: #667eea;
}

button {
    background: #667eea;
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 25px;
    cursor: pointer;
    font-size: 14px;
    transition: transform 0.2s, background 0.2s;
}

button:hover:not(:disabled) {
    background: #5a67d8;
    transform: translateY(-2px);
}

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.clear-btn {
    background: #f44336;
}

.clear-btn:hover:not(:disabled) {
    background: #da190b;
}

.status-bar {
    background: #f9f9f9;
    padding: 8px 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.85rem;
    border-top: 1px solid #e0e0e0;
}

.status-indicator {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #4caf50;
    transition: all 0.3s;
}

.status-indicator.loading {
    animation: pulse 1s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-right: 10px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}