* {
    box-sizing: border-box;
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background: #f4f6f9;
    margin: 0;
    padding: 0;
}

.app-container {
    max-width: 900px;
    margin: 40px auto;
    background: white;
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

header h1 {
    margin: 0;
    color: #1f2937;
}

header p {
    color: #6b7280;
    margin-top: 8px;
}

main {
    margin-top: 30px;
}

textarea {
    width: 100%;
    height: 160px;
    padding: 15px;
    border-radius: 8px;
    border: 1px solid #d1d5db;
    font-size: 15px;
    resize: none;
}

button {
    margin-top: 20px;
    padding: 12px 20px;
    font-size: 16px;
    background: #2563eb;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
}

button:hover {
    background: #1d4ed8;
}

#resultBox {
    margin-top: 30px;
    padding: 20px;
    border-radius: 8px;
    background: #f9fafb;
    border-left: 6px solid #2563eb;
}

#prediction {
    margin: 0;
}

.hidden {
    display: none;
}

footer {
    margin-top: 40px;
    text-align: center;
    color: #9ca3af;
}