body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: #f5f7fb;
    color: #101828;
}

.topbar {
    background: #0f172a;
    color: #fff;
    padding: 14px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.topbar .brand {
    font-size: 20px;
    font-weight: 700;
}

.topbar nav {
    display: flex;
    gap: 16px;
    align-items: center;
}

.topbar nav a,
.link-button {
    color: #fff;
    text-decoration: none;
    background: none;
    border: 0;
    cursor: pointer;
    font: inherit;
}

.page {
    max-width: 1400px;
    margin: 24px auto;
    padding: 0 20px 30px;
}

.message {
    padding: 12px 14px;
    border-radius: 10px;
    margin-bottom: 12px;
    font-weight: 500;
}

.message.success {
    background: #ecfdf3;
    color: #027a48;
    border: 1px solid #a6f4c5;
}

.message.error {
    background: #fef3f2;
    color: #b42318;
    border: 1px solid #fecdca;
}

.message.warning {
    background: #fffaeb;
    color: #b54708;
    border: 1px solid #fedf89;
}

.page-title {
    margin: 0 0 6px 0;
    font-size: 30px;
    font-weight: 700;
}

.page-subtitle {
    margin: 0;
    color: #667085;
}

.card {
    background: #ffffff;
    border: 1px solid #dfe5ec;
    border-radius: 14px;
    padding: 20px;
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.06);
    margin-bottom: 20px;
}

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

.summary-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(220px, 1fr));
    gap: 14px;
    margin-top: 16px;
}

.summary-item,
.metric {
    background: #f8fafc;
    border: 1px solid #e6ebf1;
    border-radius: 12px;
    padding: 12px 14px;
}

.summary-item label,
.metric label {
    display: block;
    font-size: 12px;
    color: #667085;
    margin-bottom: 4px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.summary-item div {
    font-weight: 600;
    color: #101828;
}

.metric div {
    font-size: 18px;
    font-weight: 700;
    color: #101828;
}

.two-col {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 20px;
    align-items: start;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(160px, 1fr));
    gap: 14px;
}

.field-wrap {
    display: flex;
    flex-direction: column;
}

.field-wrap label {
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 6px;
    color: #344054;
}

.field-wrap input,
.field-wrap select,
.field-wrap textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid #d0d5dd;
    border-radius: 10px;
    font-size: 14px;
    background: #fff;
    box-sizing: border-box;
}

.field-wrap input:focus,
.field-wrap select:focus,
.field-wrap textarea:focus {
    outline: none;
    border-color: #2563eb;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.field-errors {
    color: #b42318;
    font-size: 12px;
    margin-top: 4px;
}

.button-row {
    display: flex;
    gap: 12px;
    margin-top: 18px;
}

.btn {
    display: inline-block;
    padding: 10px 16px;
    border-radius: 10px;
    text-decoration: none;
    border: 0;
    cursor: pointer;
    font-weight: 600;
    font-size: 14px;
}

.btn-primary {
    background: #2563eb;
    color: #fff;
}

.btn-secondary {
    background: #e5e7eb;
    color: #111827;
}

.preview-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.data-table th,
.data-table td {
    padding: 12px 10px;
    border-bottom: 1px solid #e5e7eb;
    text-align: left;
}

.data-table th {
    background: #f8fafc;
    color: #344054;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.data-table tr:hover td {
    background: #f9fafb;
}

@media (max-width: 1100px) {
    .two-col {
        grid-template-columns: 1fr;
    }

    .form-grid {
        grid-template-columns: repeat(2, minmax(160px, 1fr));
    }
}

@media (max-width: 700px) {
    .summary-grid,
    .form-grid,
    .preview-grid {
        grid-template-columns: 1fr;
    }

    .page {
        padding: 0 12px 24px;
    }

    .topbar {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
}