body {
    margin: 0;
    font-family: sans-serif;
    background: linear-gradient(135deg, #1e1e2f, #2d2d44);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.app-container {
    width: 95%;
    max-width: 500px;
    height: 90vh;
    backdrop-filter: blur(20px);
    background: rgba(255,255,255,0.08);
    border-radius: 20px;
    padding: 20px;
    display: flex;
    flex-direction: column;
}

.header {
    font-size: 28px;
    text-align: center;
    color: #fff;
    margin-bottom: 15px;
}

.chat-box {
    flex: 1;
    overflow-y: auto;
    padding: 10px;
    color: #fff;
}

.msg {
    margin: 10px 0;
    padding: 10px;
    border-radius: 12px;
    max-width: 80%;
}

.user {
    background: rgba(0, 150, 255, 0.4);
    align-self: flex-end;
}

.bot {
    background: rgba(255, 255, 255, 0.2);
    align-self: flex-start;
}

.input-area {
    display: flex;
    gap: 10px;
}

input {
    flex: 1;
    padding: 12px;
    border-radius: 12px;
    border: none;
    outline: none;
}

button {
    padding: 12px 20px;
    border-radius: 12px;
    border: none;
    background: #00aaff;
    color: #fff;
    cursor: pointer;
}