* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, Helvetica, sans-serif;
}

body {
    height: 100vh;
    background: url("https://images.unsplash.com/photo-1503376780353-7e6692767b70")
        no-repeat center center/cover;
}

.overlay {
    background: rgba(0, 0, 0, 0.75);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Chat container */
.chat-container {
    width: 420px;
    max-width: 90%;
    background: rgba(20, 20, 20, 0.85);
    padding: 25px;
    border-radius: 12px;
    color: #fff;
    box-shadow: 0 0 25px rgba(0,0,0,0.6);
}

.chat-container h1 {
    text-align: center;
    margin-bottom: 15px;
}

/* Answer box */
.chat-box {
    min-height: 160px;
    max-height: 260px;
    overflow-y: auto;
    background: #111;
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 15px;
    line-height: 1.5;
}

/* Input area */
.input-area {
    display: flex;
    gap: 8px;
}

.input-area input {
    flex: 1;
    padding: 10px;
    border-radius: 6px;
    border: none;
    outline: none;
}

.input-area button {
    padding: 10px 14px;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    background: #ff9800;
    color: #000;
    font-weight: bold;
}

.input-area button:hover {
    background: #ffa726;
}

/* Voice button */
.voice-btn {
    background: #03a9f4;
    color: #000;
}