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

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: #f6f7fb;
    color: #222;
    line-height: 1.7;
}

.page {
    max-width: 800px;
    margin: 40px auto;
    padding: 40px;
    background: white;
    border-radius: 14px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
}

header {
    margin-bottom: 32px;
}

h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    line-height: 1.2;
    margin-bottom: 18px;
    color: #111;
}

h2 {
    margin-top: 48px;
    margin-bottom: 16px;
    font-size: 1.8rem;
    color: #111;
    border-bottom: 2px solid #eee;
    padding-bottom: 8px;
}

h3 {
    margin-top: 28px;
    margin-bottom: 10px;
    font-size: 1.2rem;
    color: #222;
}

p {
    margin-bottom: 18px;
    color: #444;
}

a {
    color: #0a66c2;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.file-label {
    display: inline-block;
    margin-top: 12px;
    margin-bottom: 18px;
    padding: 14px 28px;
    background: #0a66c2;
    color: white;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: .2s;
}

.file-label:hover {
    background: #084d94;
}

input[type=file] {
    display: none;
}

.options {
    display: flex;
    gap: 25px;
    margin: 20px 0 30px;
    flex-wrap: wrap;
}

.options label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

#canvas-container {
    display: flex;
    justify-content: center;
    align-items: center;

    width: 100%;
    padding: 16px;

    border: 2px dashed #ccc;
    border-radius: 12px;
    background: #fafafa;

    overflow: auto;
}

#canvas-container canvas {
    display: block;
    max-width: 100%;
    height: auto;
}

#download-btn {
    display: inline-block;
    padding: 14px 30px;
    border: none;
    border-radius: 8px;
    background: #28a745;
    color: white;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: .2s;
    margin-bottom: 30px;
}

#download-btn:hover:not(:disabled) {
    background: #218838;
}

#download-btn:disabled {
    background: #b8b8b8;
    cursor: not-allowed;
}

ul,
ol {
    margin: 18px 0 18px 28px;
}

li {
    margin-bottom: 8px;
}

footer {
    margin-top: 60px;
    padding-top: 24px;
    border-top: 1px solid #ddd;
    text-align: center;
    color: #777;
    font-size: .95rem;
}

#internal-links {
    margin-top: 50px;
    padding: 24px;
    background: #f8f8f8;
    border-radius: 10px;
}

#internal-links ul {
    margin: 0;
    padding-left: 20px;
}

#internal-links li {
    margin: 10px 0;
}

@media (max-width: 768px) {

    .page {
        margin: 20px;
        padding: 24px;
    }

    h2 {
        font-size: 1.5rem;
    }

    .options {
        flex-direction: column;
        gap: 12px;
    }

    .file-label,
    #download-btn {
        width: 100%;
        text-align: center;
    }

    #canvas-container {
        min-height: 220px;
    }
}
table {
    width: 100%;
    margin: 28px 0;
    border-collapse: collapse;
    border-radius: 12px;
    overflow: hidden;
    background: #fff;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
}

thead {
    background: #0a66c2;
    color: white;
}

th,
td {
    padding: 16px 20px;
    text-align: left;
}

th {
    font-weight: 600;
    font-size: 1rem;
}

tbody tr:nth-child(even) {
    background: #f7f9fc;
}

tbody tr {
    border-bottom: 1px solid #ececec;
}

tbody tr:last-child {
    border-bottom: none;
}

td:first-child {
    font-weight: 500;
    width: 40%;
}

@media (max-width: 700px) {
    table {
        font-size: 0.95rem;
    }

    th,
    td {
        padding: 12px;
    }
}