* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
    background: #f4f7fb;
    color: #172033;
}

.page {
    min-height: 100vh;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: flex-start;
}

.page.wide {
    display: block;
}

.card {
    width: 100%;
    max-width: 560px;
    background: white;
    border-radius: 18px;
    padding: 24px;
    box-shadow: 0 12px 35px rgba(28, 48, 78, 0.08);
}

.page.wide .card {
    max-width: 1200px;
    margin: 0 auto;
}

h1 {
    margin: 0 0 10px;
    font-size: 26px;
}

h2 {
    margin-top: 0;
    font-size: 20px;
}

.muted {
    color: #6b7280;
    font-size: 14px;
    margin: 8px 0;
}

.notice {
    margin: 18px 0;
    padding: 12px;
    background: #eef6ff;
    border: 1px solid #cfe6ff;
    border-radius: 12px;
    color: #24527a;
    font-size: 14px;
}

.file-box {
    display: block;
    border: 2px dashed #97b8e8;
    background: #f8fbff;
    color: #2864b4;
    border-radius: 16px;
    padding: 30px;
    text-align: center;
    cursor: pointer;
    margin-bottom: 16px;
}

.file-box input {
    display: none;
}

.preview {
    width: 100%;
    max-height: 360px;
    object-fit: contain;
    border-radius: 12px;
    border: 1px solid #e5e7eb;
    margin-bottom: 16px;
}

button {
    width: 100%;
    border: none;
    border-radius: 12px;
    padding: 14px 18px;
    background: #2563eb;
    color: white;
    font-size: 16px;
    cursor: pointer;
}

button:disabled {
    background: #9ca3af;
    cursor: not-allowed;
}

.result {
    margin-top: 18px;
    padding: 16px;
    border-radius: 14px;
    background: #f9fafb;
    border: 1px solid #e5e7eb;
    line-height: 1.7;
}

.error {
    color: #b91c1c;
    font-weight: bold;
}

.hidden {
    display: none !important;
}

.filter-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr 0.8fr 120px;
    gap: 12px;
    align-items: end;
    margin: 18px 0;
}

label {
    display: block;
    font-size: 14px;
    color: #374151;
}

input,
select {
    width: 100%;
    margin-top: 6px;
    padding: 12px;
    border: 1px solid #d1d5db;
    border-radius: 10px;
    font-size: 15px;
}

.table-wrap {
    width: 100%;
    overflow: auto;
    margin-top: 16px;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
    background: white;
}

th,
td {
    border-bottom: 1px solid #e5e7eb;
    padding: 12px;
    vertical-align: top;
    text-align: left;
}

th {
    background: #f9fafb;
    color: #374151;
}

.question-text {
    max-width: 460px;
    white-space: pre-wrap;
}

.small-btn {
    width: auto;
    padding: 8px 12px;
    font-size: 14px;
}

@media (max-width: 760px) {
    .page {
        padding: 12px;
    }

    .card {
        padding: 18px;
    }

    .filter-grid {
        grid-template-columns: 1fr;
    }
}