:root {
    --bg: #f7f3f1;
    --surface: #ffffff;
    --ink: #2b1d1d;
    --muted: #6d5757;
    --primary: #8d3030;
    --primary-soft: #aa3a3a;
    --border: #e4d7d4;
    --ok: #1f7a43;
    --warn: #9a3412;
    --font: "Source Sans 3", "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

body.admin-body {
    margin: 0;
    font-family: var(--font);
    background:
        radial-gradient(circle at top left, rgba(170, 58, 58, 0.12), transparent 35%),
        linear-gradient(180deg, #faf7f5 0%, var(--bg) 100%);
    color: var(--ink);
    min-height: 100vh;
}

.admin-header {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 1rem;
    padding: 1rem 1.5rem;
    background: var(--primary);
    color: #f3eaea;
}

.admin-brand {
    font-weight: 700;
    font-size: 1.15rem;
}

.admin-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    align-items: center;
}

.admin-nav a,
.admin-nav button {
    color: inherit;
    text-decoration: none;
    background: transparent;
    border: 0;
    cursor: pointer;
    font: inherit;
    padding: 0.25rem 0.4rem;
    opacity: 0.85;
}

.admin-nav a.is-active,
.admin-nav a:hover,
.admin-nav button:hover {
    opacity: 1;
    text-decoration: underline;
}

.admin-main {
    max-width: 1100px;
    margin: 0 auto;
    padding: 1.5rem;
}

.page-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.lead {
    color: var(--muted);
}

.flash {
    padding: 0.85rem 1rem;
    margin-bottom: 1rem;
    border-radius: 6px;
}

.flash.success {
    background: #e8f7ee;
    color: var(--ok);
}

.flash.error {
    background: #fdecec;
    color: #9b1c1c;
}

.flash ul {
    margin: 0;
    padding-left: 1.1rem;
}

.panel {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1.25rem;
    margin-bottom: 1.25rem;
}

.stack-form {
    display: grid;
    gap: 1rem;
}

.stack-form label {
    display: grid;
    gap: 0.35rem;
    font-weight: 600;
}

.stack-form input,
.stack-form select,
.stack-form textarea {
    font: inherit;
    padding: 0.65rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: #fff;
}

.form-row {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    align-items: end;
}

.checkbox {
    display: flex !important;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500 !important;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.7rem 1rem;
    border-radius: 6px;
    border: 1px solid transparent;
    text-decoration: none;
    font: inherit;
    cursor: pointer;
}

.btn.primary {
    background: var(--primary);
    color: #fff;
}

.btn.ghost {
    background: transparent;
    border-color: var(--border);
    color: var(--ink);
}

.login-card {
    max-width: 420px;
    margin: 4rem auto;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.75rem;
}

.hint {
    color: var(--muted);
    font-size: 0.95rem;
}

.stat-row {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
    margin: 1.25rem 0;
}

.stat {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1rem;
}

.stat strong {
    display: block;
    font-size: 1.4rem;
    margin-bottom: 0.25rem;
}

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

.admin-tile {
    display: grid;
    gap: 0.35rem;
    padding: 1.2rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    text-decoration: none;
    color: inherit;
    transition: transform 0.15s ease, border-color 0.15s ease;
}

.admin-tile:hover {
    transform: translateY(-2px);
    border-color: var(--primary-soft);
}

.admin-tile span {
    color: var(--muted);
}

.topic-tree,
.topic-tree ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.tree-item {
    margin-bottom: 0.5rem;
}

.tree-row {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.85rem 1rem;
    margin-left: calc(var(--depth) * 1.25rem);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
}

.tree-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    align-items: center;
}

.tree-actions a,
.tree-actions button,
.link-danger {
    background: none;
    border: 0;
    color: var(--primary);
    cursor: pointer;
    font: inherit;
    padding: 0;
    text-decoration: none;
}

.link-danger {
    color: #9b1c1c;
}

.badges {
    display: inline-flex;
    gap: 0.35rem;
    margin-left: 0.5rem;
}

.badge {
    display: inline-block;
    padding: 0.1rem 0.45rem;
    border-radius: 999px;
    background: #f3dede;
    color: var(--primary);
    font-size: 0.8rem;
}

.badge.muted {
    background: #eee;
    color: var(--muted);
}

.cover-preview img,
.thumb {
    max-width: 160px;
    max-height: 100px;
    object-fit: cover;
    border-radius: 6px;
    border: 1px solid var(--border);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

.data-table th,
.data-table td {
    text-align: left;
    padding: 0.65rem 0.4rem;
    border-bottom: 1px solid var(--border);
    vertical-align: middle;
}

.inline-media-form {
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    align-items: end;
}

.ok { color: var(--ok); font-weight: 600; }
.warn { color: var(--warn); font-weight: 600; }
.error-list { line-height: 1.6; }

.inline-form { display: inline; }

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

    .tree-row {
        flex-direction: column;
    }
}