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

body {

    font-family: Arial, sans-serif;

    background: #0f172a;

    color: white;

    min-height: 100vh;

    display: flex;

    justify-content: center;

    align-items: center;

    padding: 30px;
}

.container {

    width: 100%;

    max-width: 900px;
}

.card {

    background: #1e293b;

    border-radius: 20px;

    padding: 30px;

    box-shadow:
        0 0 20px rgba(0,0,0,0.4);
}

h1 {

    font-size: 38px;

    margin-bottom: 10px;
}

.subtitle {

    color: #94a3b8;

    margin-bottom: 30px;

    font-size: 16px;
}

.section {

    margin-top: 30px;
}

h2 {

    margin-bottom: 15px;

    font-size: 22px;
}

input[type="file"] {

    margin-bottom: 15px;

    color: white;
}

.input-row {

    display: flex;

    gap: 10px;

    margin-top: 15px;
}

input[type="text"] {

    flex: 1;

    padding: 14px;

    border: none;

    border-radius: 10px;

    outline: none;

    font-size: 15px;

    background: #334155;

    color: white;
}

button {

    padding: 14px 22px;

    border: none;

    border-radius: 10px;

    background: #3b82f6;

    color: white;

    cursor: pointer;

    font-size: 15px;

    transition: 0.2s;
}

button:hover {

    background: #2563eb;
}

.chat-box {

    background: #0f172a;

    border-radius: 12px;

    padding: 20px;

    height: 350px;

    overflow-y: auto;

    border: 1px solid #334155;
}

.user-message,
.bot-message {

    padding: 12px 16px;

    border-radius: 12px;

    margin-bottom: 12px;

    max-width: 80%;

    line-height: 1.5;
}

.user-message {

    background: #2563eb;

    margin-left: auto;
}

.bot-message {

    background: #334155;
}

#uploadStatus {

    margin-top: 10px;

    color: #22c55e;
}