* { box-sizing: border-box; }
body {
    font-family: -apple-system, Segoe UI, Roboto, Arial, sans-serif;
    background: #f4f5f7;
    color: #1d1f23;
    margin: 0;
    padding: 0 0 3rem;
}
header {
    background: #1d3557;
    color: white;
    padding: 1rem 2rem;
}
header h1 { margin: 0; font-size: 1.4rem; }
main {
    max-width: 780px;
    margin: 1.5rem auto;
    padding: 0 1rem;
}
.card {
    background: white;
    border: 1px solid #e0e2e6;
    border-radius: 8px;
    padding: 1.25rem 1.5rem;
    margin-bottom: 1.5rem;
}
.card h2 { margin-top: 0; font-size: 1.1rem; }
fieldset {
    border: 1px solid #e0e2e6;
    border-radius: 6px;
    margin-bottom: 1rem;
    padding: 0.75rem 1rem 1rem;
}
legend { font-weight: 600; padding: 0 0.4rem; }
label {
    display: block;
    margin: 0.5rem 0;
    font-size: 0.92rem;
}
input, select {
    display: block;
    width: 100%;
    margin-top: 0.25rem;
    padding: 0.45rem;
    border: 1px solid #c9cdd3;
    border-radius: 4px;
    font-size: 0.95rem;
}
.inline-form { display: inline-block; margin-right: 0.5rem; }
button {
    background: #1d3557;
    color: white;
    border: none;
    padding: 0.6rem 1.2rem;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.95rem;
    margin-top: 0.5rem;
}
button.secondary { background: #6c757d; }
button:hover { opacity: 0.9; }
.flash {
    background: #fff3cd;
    border: 1px solid #ffe58f;
    padding: 0.75rem 1rem;
    border-radius: 6px;
    margin-bottom: 1rem;
}
.ok { color: #1a7f37; font-weight: 600; }
.table-scroll { overflow-x: auto; margin-bottom: 1rem; }
table { border-collapse: collapse; width: 100%; font-size: 0.85rem; }
th, td { border: 1px solid #e0e2e6; padding: 0.4rem 0.6rem; text-align: left; white-space: nowrap; }
.result-table td:first-child { color: #555; width: 55%; }
.result-table tr.highlight td { font-weight: 600; background: #f0f4f9; }
.total { margin-top: 1.5rem; }
.hint { font-size: 0.82rem; color: #666; }
.button {
    display: inline-block;
    margin-top: 1rem;
    background: #1d3557;
    color: white;
    padding: 0.6rem 1.2rem;
    border-radius: 5px;
    text-decoration: none;
}
.dxf-preview {
    display: flex;
    justify-content: center;
    margin-bottom: 1rem;
}
.button.secondary-button {
    background: #6c757d;
    margin-left: 0.5rem;
}
.dxf-preview-wrap {
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px dashed #e0e2e6;
}
.dxf-preview-error {
    color: #b42318;
    font-size: 0.85rem;
    margin: 0.25rem 0;
}
.dxf-layers {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem 1rem;
    align-items: center;
}
.dxf-layers .hint { width: 100%; margin: 0 0 0.25rem; }
.layer-checkbox {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    width: auto;
    margin: 0;
    font-size: 0.85rem;
}
.layer-checkbox input {
    display: inline-block;
    width: auto;
    margin: 0;
}
.radio-inline, .checkbox-inline {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    width: auto;
}
.radio-inline input, .checkbox-inline input {
    display: inline-block;
    width: auto;
    margin: 0;
}
footer {
    max-width: 780px;
    margin: 0 auto;
    padding: 0 1rem 2rem;
    font-size: 0.85rem;
    color: #888;
    display: flex;
    gap: 1rem;
    align-items: center;
}
footer a { color: #888; }
.link-button {
    background: none;
    border: none;
    color: #888;
    text-decoration: underline;
    padding: 0;
    margin: 0;
    font-size: 0.85rem;
    cursor: pointer;
}