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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    background: #f4f6f8;
    color: #1f2933;
    line-height: 1.6;
}

header {
    background: linear-gradient(135deg, #1d4ed8, #2563eb);
    color: #fff;
    padding: 40px 24px 32px;
    text-align: center;
}

header h1 {
    font-size: 26px;
    letter-spacing: 1px;
}

header .subtitle {
    margin-top: 8px;
    opacity: 0.9;
    font-size: 14px;
}

main {
    max-width: 820px;
    margin: -16px auto 48px;
    padding: 0 16px;
}

.card {
    background: #fff;
    border: 1px solid #e5e7eb;
    border-radius: 10px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
    padding: 24px;
    margin-top: 24px;
}

.card h2 {
    font-size: 17px;
    color: #111827;
    margin-bottom: 10px;
    border-left: 4px solid #2563eb;
    padding-left: 10px;
}

.hint {
    color: #6b7280;
    font-size: 13px;
    margin-bottom: 14px;
}

.req {
    color: #dc2626;
}

.row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 12px 0;
    flex-wrap: wrap;
}

.field {
    margin: 12px 0;
}

.field label {
    display: block;
    font-size: 13px;
    color: #374151;
    margin-bottom: 6px;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 0 16px;
}

input[type="text"],
input[type="date"],
input[type="number"],
select,
textarea {
    width: 100%;
    padding: 9px 12px;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    font-size: 14px;
    background: #fff;
    color: #111827;
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: #2563eb;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

textarea {
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
    font-size: 12px;
    resize: vertical;
}

button {
    padding: 9px 18px;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    background: #fff;
    color: #1f2933;
    font-size: 14px;
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s;
}

button:hover {
    background: #f3f4f6;
}

button.primary {
    background: #2563eb;
    border-color: #2563eb;
    color: #fff;
    font-weight: 600;
}

button.primary:hover {
    background: #1d4ed8;
}

.status {
    font-size: 13px;
    color: #6b7280;
}

.status.ok {
    color: #16a34a;
}

.status.error {
    color: #dc2626;
}

.message {
    margin-top: 12px;
    font-size: 13px;
    color: #374151;
    min-height: 20px;
}

.message.ok {
    color: #16a34a;
}

.message.error {
    color: #dc2626;
}

ol {
    padding-left: 20px;
    color: #374151;
    font-size: 14px;
}

ol li {
    margin-bottom: 8px;
}

code {
    background: #f3f4f6;
    border: 1px solid #e5e7eb;
    border-radius: 4px;
    padding: 1px 6px;
    font-size: 12px;
    color: #be185d;
}

@media (max-width: 640px) {
    .grid {
        grid-template-columns: 1fr;
    }
}