body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #f5f7fa;
    color: #222;
}
header {
    background: #0d6efd;
    color: white;
    padding: 20px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
header h1 { margin: 0; font-size: 22px; }
.back-btn {
    background: white;
    color: #0d6efd;
    padding: 8px 14px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: bold;
    transition: 0.3s;
}
.back-btn:hover { background: #e7f0ff; }
.container {
    max-width: 700px;
    margin: 40px auto;
    background: white;
    padding: 30px 40px;
    border-radius: 12px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
}
h2 { color: #0d6efd; margin-top: 0; }
.subtitle { color: #666; margin-bottom: 25px; }
.input-field { margin: 15px 0; }
label {
    display: block;
    margin-bottom: 6px;
    font-weight: bold;
    color: #333;
}
input[type="text"], textarea {
    padding: 10px;
    width: 100%;
    box-sizing: border-box;
    border-radius: 8px;
    border: 1px solid #ccc;
    font-size: 15px;
    font-family: Arial;
}
input[type="text"]:focus, textarea:focus {
    outline: none;
    border-color: #0d6efd;
}
textarea {
    resize: vertical;
    min-height: 100px;
}
input[type="submit"], .btn {
    padding: 12px 24px;
    background: #0d6efd;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 15px;
    transition: 0.3s;
    margin-top: 10px;
}
input[type="submit"]:hover, .btn:hover {
    background: #084298;
    transform: scale(1.03);
}
.btn-secondary {
    background: #6c757d;
}
.btn-secondary:hover {
    background: #495057;
}
.result {
    margin-top: 25px;
    padding: 18px;
    background: #e7f0ff;
    border-left: 4px solid #0d6efd;
    border-radius: 8px;
    font-size: 16px;
    white-space: pre-line;
    min-height: 30px;
}
.btn-row {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}
.section-title {
    margin-top: 20px;
    margin-bottom: 12px;
    color: #084298;
    font-weight: bold;
}
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 15px;
}
th {
    background: #0d6efd;
    color: white;
    padding: 12px 15px;
    text-align: left;
    font-size: 15px;
}
th:first-child { border-top-left-radius: 8px; }
th:last-child { border-top-right-radius: 8px; }
td {
    padding: 12px 15px;
    border-bottom: 1px solid #e7f0ff;
    font-size: 15px;
}
tr:nth-child(even) td { background: #f5f7fa; }
tr:hover td { background: #e7f0ff; }
.open-link {
    color: #0d6efd;
    text-decoration: none;
    font-weight: bold;
    transition: 0.3s;
}
.open-link:hover {
    color: #084298;
    text-decoration: underline;
}
.num-cell {
    font-weight: bold;
    color: #0d6efd;
    width: 60px;
}