/* ---------- KB login (public password gate) ---------- */
.kb-login-wrap {
    display: flex;
    justify-content: center;
    padding: 24px 0;
}
.kb-login-card {
    background: #ffffff;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    padding: 40px;
    width: 100%;
    max-width: 440px;
    box-shadow: 0 18px 48px rgba(15, 23, 42, .08);
}
.kb-login-card h2 {
    margin: 0 0 8px;
    font-size: 1.4rem;
}
.kb-login-hint {
    color: #64748b;
    font-size: .9rem;
    margin: 0 0 22px;
    line-height: 1.55;
}
.kb-login-card label {
    display: block;
    font-weight: 600;
    margin-bottom: 6px;
    color: #0f172a;
}
.kb-login-card input[type="password"] {
    width: 100%;
    padding: 11px 14px;
    border: 1px solid #cbd5e1;
    border-radius: 6px;
    font-size: 1rem;
    font-family: inherit;
}
.kb-login-card input[type="password"]:focus {
    outline: none;
    border-color: #1d4ed8;
    box-shadow: 0 0 0 3px rgba(29, 78, 216, .15);
}
.kb-login-card .btn {
    width: 100%;
    margin-top: 16px;
    padding: 12px;
}
.kb-login-error {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fca5a5;
    border-radius: 6px;
    padding: 10px 14px;
    font-size: .9rem;
    margin-bottom: 16px;
}
.kb-login-back {
    margin: 22px 0 0;
    text-align: center;
    font-size: .85rem;
}
.kb-login-back a { color: #64748b; }
.kb-login-back a:hover { color: #1d4ed8; }

/* ---------- Knowledge base layout ---------- */
.kb-breadcrumb {
    color: #cbd5e1;
    font-size: .9rem;
    margin-bottom: 12px;
}
.kb-breadcrumb a { color: #7dd3fc; }
.kb-breadcrumb a:hover { color: #ffffff; }

.kb-meta-light { color: #cbd5e1; font-size: .9rem; margin: 6px 0 0; }

.kb-cat-card {
    text-decoration: none;
    color: inherit;
    display: block;
    transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.kb-cat-card:hover { text-decoration: none; border-color: #1d4ed8; }
.kb-count {
    display: inline-block;
    margin-top: 12px;
    color: #1d4ed8;
    font-weight: 600;
    font-size: .85rem;
}

.kb-recent-list {
    display: grid;
    gap: 12px;
    max-width: 880px;
    margin: 0 auto;
}
.kb-recent-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
    padding: 20px 24px;
    background: #fff;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    text-decoration: none;
    color: inherit;
    transition: border-color .15s ease, transform .15s ease;
}
.kb-recent-item:hover {
    text-decoration: none;
    border-color: #1d4ed8;
    transform: translateX(2px);
}
.kb-recent-item h3 { margin: 6px 0 4px; font-size: 1.1rem; }
.kb-recent-item p  { color: #475569; margin: 0; font-size: .9rem; }
.kb-recent-item time { color: #64748b; font-size: .85rem; white-space: nowrap; }

.kb-tag {
    display: inline-block;
    background: #e0e7ff;
    color: #1d4ed8;
    padding: 3px 10px;
    border-radius: 999px;
    font-size: .75rem;
    font-weight: 600;
    text-transform: capitalize;
}
.kb-tag-sm {
    display: inline-block;
    background: #f1f5f9;
    color: #475569;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: .75rem;
    margin-right: 6px;
}

.kb-layout {
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: 48px;
    align-items: start;
}
.kb-sidebar h4 {
    text-transform: uppercase;
    letter-spacing: .05em;
    font-size: .8rem;
    color: #64748b;
    margin-bottom: 14px;
}
.kb-sidebar ul { list-style: none; padding: 0; margin: 0; }
.kb-sidebar li { margin-bottom: 4px; }
.kb-sidebar a {
    display: block;
    padding: 8px 12px;
    border-radius: 6px;
    color: #1f2937;
}
.kb-sidebar a:hover { background: #f1f5f9; text-decoration: none; }
.kb-sidebar a.active {
    background: #e0e7ff;
    color: #1d4ed8;
    font-weight: 600;
}

.kb-article-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; }
.kb-article-list li a {
    display: block;
    padding: 20px 24px;
    background: #fff;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    text-decoration: none;
    color: inherit;
    transition: border-color .15s ease;
}
.kb-article-list li a:hover { border-color: #1d4ed8; text-decoration: none; }
.kb-article-list h3 { margin: 0 0 6px; font-size: 1.15rem; }
.kb-article-list p  { color: #475569; margin: 0 0 10px; }
.kb-meta { color: #64748b; font-size: .8rem; }
.kb-meta time { margin-right: 12px; }
.kb-empty { color: #64748b; font-style: italic; }

/* Article body */
.kb-article {
    background: #ffffff;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
    padding: 36px 44px;
}
.kb-cover {
    width: 100%;
    border-radius: 8px;
    margin-bottom: 24px;
}
.kb-body h1, .kb-body h2, .kb-body h3, .kb-body h4 {
    margin-top: 1.4em;
    margin-bottom: .5em;
}
.kb-body h2 { border-bottom: 1px solid #e5e7eb; padding-bottom: 8px; }
.kb-body p, .kb-body ul, .kb-body ol { margin-bottom: 1em; line-height: 1.7; }
.kb-body img { max-width: 100%; border-radius: 6px; margin: 12px 0; }
.kb-body code {
    background: #f1f5f9;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: .9em;
    font-family: 'SF Mono', Menlo, Consolas, monospace;
}
.kb-body pre {
    background: #0f172a;
    color: #e2e8f0;
    padding: 16px 20px;
    border-radius: 8px;
    overflow-x: auto;
    font-family: 'SF Mono', Menlo, Consolas, monospace;
    font-size: .9em;
}
.kb-body pre code { background: transparent; padding: 0; color: inherit; }
.kb-body blockquote {
    border-left: 4px solid #1d4ed8;
    margin: 16px 0;
    padding: 4px 16px;
    color: #475569;
    background: #f8fafc;
    border-radius: 0 6px 6px 0;
}
.kb-body table {
    border-collapse: collapse;
    width: 100%;
    margin: 16px 0;
}
.kb-body th, .kb-body td {
    border: 1px solid #e5e7eb;
    padding: 10px 14px;
    text-align: left;
}
.kb-body th { background: #f1f5f9; }

.kb-article-tags {
    margin-top: 32px;
    padding-top: 16px;
    border-top: 1px solid #e5e7eb;
    color: #64748b;
    font-size: .9rem;
}
.kb-back { margin-top: 28px; }

@media (max-width: 860px) {
    .kb-layout { grid-template-columns: 1fr; gap: 28px; }
    .kb-sidebar ul { display: flex; flex-wrap: wrap; gap: 6px; }
    .kb-sidebar li { margin: 0; }
    .kb-recent-item { flex-direction: column; align-items: flex-start; }
    .kb-article { padding: 24px; }
}