body {
    margin: 0;
    font-family: "Segoe UI", Arial, sans-serif;
    background: #f5f7fb;
    color: #1f2937;
}

* {
    box-sizing: border-box;
}

.container {
    max-width: 1080px;
    margin: 0 auto;
    padding: 24px;
}

.hero {
    background: linear-gradient(135deg, #0f172a, #2563eb);
    color: #fff;
    border-radius: 18px;
    padding: 24px;
    margin-bottom: 20px;
}

.hero h1,
.hero h2 {
    margin: 0 0 10px;
}

.hero p {
    margin: 0;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.9);
}

.nav {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 16px 0 20px;
}

.nav a {
    text-decoration: none;
    color: #1d4ed8;
    background: #dbeafe;
    padding: 10px 14px;
    border-radius: 999px;
    font-weight: 600;
}

.nav a.active {
    background: #1d4ed8;
    color: #fff;
}

.card {
    background: #fff;
    border: 1px solid #dbe3ef;
    border-radius: 16px;
    padding: 18px;
    margin-bottom: 16px;
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.05);
}

.card h2 {
    margin: 0 0 12px;
    font-size: 18px;
}

.subtle {
    color: #5b6472;
    font-size: 13px;
    line-height: 1.6;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 12px;
}

label {
    display: block;
    margin-bottom: 6px;
    font-weight: 600;
    font-size: 13px;
}

input,
select,
button,
textarea {
    width: 100%;
    padding: 10px 12px;
    border-radius: 10px;
    border: 1px solid #cfd8e3;
    font: inherit;
}

textarea,
pre {
    font-family: Consolas, "Courier New", monospace;
}

button {
    border: none;
    background: #2563eb;
    color: #fff;
    cursor: pointer;
    font-weight: 700;
}

button.secondary {
    background: #e2e8f0;
    color: #0f172a;
}

.actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 12px;
}

.actions button {
    width: auto;
    min-width: 140px;
}

.table-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.table-actions button {
    min-width: 0;
    padding: 6px 10px;
    font-size: 12px;
}

.builder-stack {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.builder-row {
    display: grid;
    grid-template-columns: minmax(140px, 1.1fr) minmax(140px, 1fr) minmax(180px, 1.2fr) auto;
    gap: 10px;
    align-items: end;
    padding: 12px;
    border: 1px solid #dbe3ef;
    border-radius: 12px;
    background: #f8fbff;
}

.builder-row button {
    width: auto;
    min-width: 110px;
}

.toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
}

.toolbar .inline-field {
    min-width: 180px;
    flex: 1 1 220px;
}

.toolbar button {
    width: auto;
    min-width: 140px;
}

.hint-box {
    background: #eff6ff;
    color: #1e40af;
    border-radius: 12px;
    padding: 12px 14px;
    line-height: 1.7;
    font-size: 13px;
}

.builder-stack {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.builder-row {
    display: grid;
    grid-template-columns: minmax(140px, 1.1fr) minmax(140px, 1fr) minmax(180px, 1.2fr) auto;
    gap: 10px;
    align-items: end;
    padding: 12px;
    border: 1px solid #dbe3ef;
    border-radius: 12px;
    background: #f8fbff;
}

.builder-row button {
    width: auto;
    min-width: 110px;
}

.toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
}

.toolbar .inline-field {
    min-width: 180px;
    flex: 1 1 220px;
}

.toolbar button {
    width: auto;
    min-width: 140px;
}

.hint-box {
    background: #eff6ff;
    color: #1e40af;
    border-radius: 12px;
    padding: 12px 14px;
    line-height: 1.7;
    font-size: 13px;
}

.readonly-box {
    background: #f8fafc;
    color: #475569;
}

.status {
    margin-top: 12px;
    min-height: 46px;
    padding: 12px;
    border-radius: 10px;
    background: #eff6ff;
    color: #1d4ed8;
    white-space: pre-wrap;
}

.status.success {
    background: #ecfdf5;
    color: #15803d;
}

.status.error {
    background: #fef2f2;
    color: #b91c1c;
}

.token,
pre {
    background: #f8fafc;
    color: #1e3a8a;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    padding: 14px;
    overflow: auto;
}

pre {
    margin: 0;
    max-height: 400px;
    white-space: pre-wrap;
    word-break: break-word;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
}

th,
td {
    border-bottom: 1px solid #e5e7eb;
    padding: 10px 8px;
    text-align: left;
    vertical-align: top;
    font-size: 13px;
}

th {
    color: #5b6472;
}

@media (max-width: 860px) {
    .builder-row {
        grid-template-columns: 1fr;
    }
}

.site-footer {
    text-align: center;
    padding: 16px 40px;
    border-top: 1px solid #e5e7eb;
    margin: 40px auto 0;
    max-width: 1200px;
}

.site-footer a {
    color: #9ca3af;
    font-size: 13px;
    text-decoration: none;
}

.site-footer a:hover {
    color: #6b7280;
}