:root {
    --admin-primary: #1e3a5f;
    --admin-primary-light: #2c5282;
    --admin-bg: #f4f6f9;
    --admin-surface: #ffffff;
    --admin-border: #d8e0ea;
    --admin-text: #1a202c;
    --admin-muted: #5a6778;
    --admin-success: #067647;
    --admin-danger: #b42318;
    --admin-radius: 10px;
    --admin-font: "Segoe UI", system-ui, sans-serif;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: var(--admin-font);
    background: var(--admin-bg);
    color: var(--admin-text);
}

.admin-page {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.5rem 1rem 3rem;
}

.admin-header {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.admin-header h1 {
    margin: 0;
    font-size: 1.6rem;
    color: var(--admin-primary);
}

.admin-header p {
    margin: 0.25rem 0 0;
    color: var(--admin-muted);
    font-size: 0.95rem;
}

.admin-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.btn {
    border: none;
    border-radius: 8px;
    padding: 0.65rem 1rem;
    font: inherit;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
}

.btn-primary { background: var(--admin-primary); color: #fff; }
.btn-primary:hover { background: var(--admin-primary-light); }
.btn-secondary { background: #e8eef5; color: var(--admin-primary); }
.btn-secondary:hover { background: #d8e4f0; }
.btn-danger { background: #fee4e2; color: var(--admin-danger); }

.login-panel,
.admin-panel {
    background: var(--admin-surface);
    border: 1px solid var(--admin-border);
    border-radius: var(--admin-radius);
    padding: 1.5rem;
    box-shadow: 0 2px 8px rgba(30, 58, 95, 0.08);
}

.login-panel {
    max-width: 420px;
    margin: 4rem auto;
}

.login-panel label {
    display: block;
    margin-bottom: 0.35rem;
    font-weight: 600;
}

.login-panel input {
    width: 100%;
    padding: 0.7rem 0.8rem;
    border: 1px solid var(--admin-border);
    border-radius: 8px;
    font: inherit;
    margin-bottom: 1rem;
}

.hidden { display: none !important; }

.message {
    padding: 0.75rem 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.message--ok {
    background: #ecfdf3;
    color: var(--admin-success);
    border: 1px solid #abefc6;
}

.message--error {
    background: #fef3f2;
    color: var(--admin-danger);
    border: 1px solid #fecdca;
}

.section-block {
    margin-bottom: 1.5rem;
}

.section-block h2 {
    margin: 0 0 0.75rem;
    font-size: 1.1rem;
    color: var(--admin-primary);
}

.node-card {
    background: #fbfcfe;
    border: 1px solid var(--admin-border);
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 0.75rem;
}

.node-card.is-hidden-node {
    opacity: 0.65;
    background: #f8f8f8;
}

.node-card__title {
    margin: 0 0 0.75rem;
    font-size: 1rem;
    color: var(--admin-primary);
}

.node-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.75rem;
}

.node-grid label {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--admin-muted);
}

.node-grid input[type="text"],
.node-grid input[type="url"] {
    padding: 0.55rem 0.65rem;
    border: 1px solid var(--admin-border);
    border-radius: 6px;
    font: inherit;
    color: var(--admin-text);
}

.node-checks {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 0.75rem;
}

.node-checks label {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.85rem;
    font-weight: 600;
}

.subitem-list {
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px dashed var(--admin-border);
}

.subitem-list h3 {
    margin: 0 0 0.5rem;
    font-size: 0.9rem;
}

.subitem-row {
    display: grid;
    grid-template-columns: 1fr 1.2fr auto;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    align-items: center;
}

.subitem-row input[type="text"] {
    padding: 0.5rem 0.6rem;
    border: 1px solid var(--admin-border);
    border-radius: 6px;
    font: inherit;
}

.meta-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.75rem;
}

.section-hint {
    margin: 0 0 0.75rem;
    color: var(--admin-muted);
    font-size: 0.88rem;
}

.section-block--global {
    background: linear-gradient(135deg, #f0f7ff 0%, #fbfcfe 100%);
    border: 1px solid #c7daf0;
    border-radius: 10px;
    padding: 1rem;
}

.node-tabs {
    display: flex;
    gap: 0.35rem;
    margin-bottom: 0.75rem;
}

.node-tab {
    flex: 1;
    padding: 0.45rem 0.65rem;
    border: 1px solid var(--admin-border);
    background: #fff;
    border-radius: 6px;
    font: inherit;
    font-size: 0.82rem;
    font-weight: 600;
    cursor: pointer;
    color: var(--admin-muted);
}

.node-tab.is-active {
    background: var(--admin-primary);
    color: #fff;
    border-color: var(--admin-primary);
}

.node-tab-pane.hidden {
    display: none;
}

.node-presentation h4 {
    margin: 0 0 0.65rem;
    font-size: 0.88rem;
    color: var(--admin-primary);
}

.node-grid select {
    padding: 0.55rem 0.65rem;
    border: 1px solid var(--admin-border);
    border-radius: 6px;
    font: inherit;
    color: var(--admin-text);
    background: #fff;
}

.node-grid input[type="number"] {
    padding: 0.55rem 0.65rem;
    border: 1px solid var(--admin-border);
    border-radius: 6px;
    font: inherit;
    color: var(--admin-text);
}

@media (max-width: 800px) {
    .node-grid,
    .meta-grid,
    .subitem-row {
        grid-template-columns: 1fr;
    }
}