.sheet-checker-page {
    width: 100%;
}

.sheet-checker-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    padding: 18px 20px;
    margin-bottom: 14px;
    background: #162b6f;
    border: 1px solid #29458f;
}

.sheet-checker-heading h1 {
    margin: 0;
    color: #f0c545;
    font-size: 28px;
    line-height: 1.1;
    text-transform: uppercase;
}

.sheet-checker-heading p {
    margin: 6px 0 0;
    color: #ffffff;
    font-size: 14px;
}

.sheet-checker-status {
    flex: 0 0 auto;
    min-width: 160px;
    padding: 9px 12px;
    color: #f0c545;
    font-size: 13px;
    font-weight: 800;
    text-align: center;
    border: 1px solid #f0c545;
    background: #102157;
}

.sheet-checker-grid {
    display: grid;
    grid-template-columns: 300px minmax(0, 1fr);
    gap: 14px;
    align-items: start;
}

.sheet-checker-panel {
    min-width: 0;
    padding: 16px;
    background: #111827;
    border: 1px solid #2c3e63;
    border-top: 4px solid #f0c545;
}

.sheet-checker-panel h2 {
    margin: 0 0 14px;
    color: #f0c545;
    font-size: 16px;
    line-height: 1.2;
    text-transform: uppercase;
}

.sheet-checker-panel label {
    display: block;
    margin-bottom: 6px;
    color: #d9e0f0;
    font-size: 12px;
    font-weight: 800;
    text-transform: uppercase;
}

.sheet-checker-panel input[type="text"],
.sheet-checker-panel textarea {
    width: 100%;
    color: #ffffff;
    font-family: Montserrat, Arial, sans-serif;
    background: #090f1d;
    border: 1px solid #3a4c70;
    border-radius: 0;
    outline: none;
}

.sheet-checker-panel input[type="text"] {
    height: 42px;
    padding: 9px 10px;
    margin-bottom: 10px;
    font-size: 14px;
}

.sheet-checker-panel textarea {
    min-height: 590px;
    padding: 12px;
    resize: vertical;
    font-family: Consolas, Monaco, monospace;
    font-size: 13px;
    line-height: 1.45;
    white-space: pre;
    tab-size: 2;
}

.sheet-checker-panel input[type="text"]:focus,
.sheet-checker-panel textarea:focus {
    border-color: #f0c545;
    box-shadow: 0 0 0 2px rgba(240, 197, 69, 0.18);
}

.sheet-checker-button {
    display: block;
    width: 100%;
    min-height: 40px;
    padding: 9px 10px;
    margin: 0 0 9px;
    color: #ffffff;
    font-family: Montserrat, Arial, sans-serif;
    font-size: 13px;
    font-weight: 800;
    text-align: center;
    text-decoration: none;
    cursor: pointer;
    background: #162b6f;
    border: 1px solid #36519a;
    border-radius: 0;
}

.sheet-checker-button:hover,
.sheet-checker-button:focus {
    color: #f0c545;
    border-color: #f0c545;
    outline: none;
}

.sheet-checker-button--primary,
.sheet-checker-submit-link {
    color: #162b6f;
    background: #f0c545;
    border-color: #f0c545;
}

.sheet-checker-button--primary:hover,
.sheet-checker-button--primary:focus,
.sheet-checker-submit-link:hover,
.sheet-checker-submit-link:focus {
    color: #ffffff;
    background: #cda72f;
}

.sheet-checker-button-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.sheet-checker-file-input {
    display: none;
}

.sheet-checker-facts {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-top: 14px;
}

.sheet-checker-facts div {
    padding: 9px;
    background: #090f1d;
    border: 1px solid #2c3e63;
}

.sheet-checker-facts span,
.sheet-checker-facts strong {
    display: block;
}

.sheet-checker-facts span {
    margin-bottom: 3px;
    color: #94a3bd;
    font-size: 10px;
    font-weight: 800;
    text-transform: uppercase;
}

.sheet-checker-facts strong {
    color: #ffffff;
    font-size: 12px;
}

.sheet-checker-note {
    margin: 12px 0 0;
    padding: 10px;
    color: #c9d1e2;
    font-size: 12px;
    line-height: 1.5;
    background: #090f1d;
    border: 1px solid #2c3e63;
}

.sheet-checker-result-panel {
    margin-top: 14px;
}

.sheet-checker-result {
    min-height: 190px;
    padding: 13px;
    color: #ffffff;
    font-family: Consolas, Monaco, monospace;
    font-size: 13px;
    line-height: 1.5;
    white-space: pre-wrap;
    overflow-x: auto;
    background: #090f1d;
    border: 1px solid #3a4c70;
}

.sheet-checker-result.good {
    border-color: #2e8b57;
    background: #0d2118;
}

.sheet-checker-result.bad {
    border-color: #a83f48;
    background: #2a1116;
}

.sheet-checker-result.warn {
    border-color: #c6922d;
    background: #2b2210;
}