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

body {
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    background: #f3f4f6;
    padding: 40px;
}

.container {
    max-width: 650px;
    margin: 0 auto;
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

h1 {
    text-align: center;
    margin-bottom: 20px;
    color: #333;
}

.input-group {
    margin-bottom: 20px;
}

label {
    font-weight: 600;
    color: #444;
}

input[type="text"] {
    width: 100%;
    padding: 10px;
    margin-top: 6px;
    border-radius: 6px;
    border: 1px solid #bbb;
    font-size: 1rem;
    transition: 0.2s;
}

input[type="text"]:focus {
    border-color: #4a90e2;
    outline: none;
}

.btn {
    width: 100%;
    padding: 12px;
    background: #4a90e2;
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 1.1rem;
    cursor: pointer;
    transition: 0.2s;
    font-weight: bold;
}

.btn:hover {
    background: #357acb;
}

.result-box {
    margin-top: 25px;
    padding: 15px;
    border-radius: 8px;
    background: #fafafa;
    border: 1px solid #ddd;
}

.error {
    color: #c0392b;
    font-weight: bold;
    margin-bottom: 10px;
}

.details table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 12px;
}

.details th, .details td {
    padding: 8px 10px;
    border: 1px solid #ccc;
}

.details th {
    background: #eee;
    font-weight: bold;
}

.loading-text {
    display: none;
    font-weight: bold;
    color: #4a90e2;
    margin-top: 15px;
    margin-bottom: 10px;
    font-size: 1rem;
    text-align: center;
}