/* ============================================
   PK Studio Design System — pklue.css
   替代 Semantic UI，纯 CSS 组件库
   ============================================ */

/* ---------- Design Tokens ---------- */
:root {
    --bg: #f5f7fa;
    --surface: #ffffff;
    --surface-hover: #f0f4ff;
    --border: #e2e8f0;
    --border-light: #f1f5f9;
    --text: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --primary: #4f46e5;
    --primary-light: #eef2ff;
    --primary-dark: #4338ca;
    --success: #10b981;
    --success-light: #ecfdf5;
    --warning: #f59e0b;
    --warning-light: #fffbeb;
    --danger: #ef4444;
    --danger-light: #fef2f2;
    --info: #3b82f6;
    --info-light: #eff6ff;
    --shadow-sm: 0 1px 2px rgba(0,0,0,.05);
    --shadow: 0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.06);
    --shadow-md: 0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.06);
    --shadow-lg: 0 10px 15px rgba(0,0,0,.1), 0 4px 6px rgba(0,0,0,.05);
    --radius: 8px;
    --radius-lg: 12px;
    --radius-sm: 4px;
    --transition: .2s ease;
    --max-width: 1200px;
    --nav-height: 56px;
    --footer-bg: #1e293b;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; -webkit-text-size-adjust: 100%; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC',
                 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; height: auto; vertical-align: middle; }
code { font-family: var(--font-mono); font-size: .875em; background: #f1f5f9; padding: 2px 6px; border-radius: 4px; }
hr { border: none; border-top: 1px solid var(--border); margin: 16px 0; }

/* ---------- Container ---------- */
.pklue-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
}
.pklue-container-fluid { width: 100%; padding: 0 20px; }

/* ---------- Main Content ---------- */
.pklue-main {
    min-height: calc(100vh - var(--nav-height) - 200px);
    padding: 32px 0;
}

/* ---------- Navigation ---------- */
.pklue-nav {
    background: #1e293b;
    height: var(--nav-height);
    position: relative;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.pklue-nav .pklue-container {
    display: flex;
    align-items: center;
    height: 100%;
}

.pklue-nav-logo {
    font-size: 18px;
    font-weight: 700;
    margin-right: 32px;
    white-space: nowrap;
}

.pklue-nav-logo:not(:has(.rainbow-text)) {
    color: #fff !important;
}

.pklue-nav-links {
    display: flex;
    align-items: center;
    gap: 2px;
    flex: 1;
}

.pklue-nav-link {
    color: rgba(255,255,255,.7) !important;
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    transition: all var(--transition);
    white-space: nowrap;
    cursor: pointer;
}

.pklue-nav-link:hover {
    color: #fff !important;
    background: rgba(255,255,255,.08);
}

.pklue-nav-right {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-left: auto;
}

.pklue-nav-search { display: flex; align-items: center; }
.pklue-nav-search .pklue-input {
    background: rgba(255,255,255,.1);
    border: 1px solid rgba(255,255,255,.15);
    color: #fff;
    padding: 6px 12px;
    font-size: 13px;
    width: 180px;
}
.pklue-nav-search .pklue-input::placeholder { color: rgba(255,255,255,.4); }
.pklue-nav-search .pklue-input:focus {
    background: rgba(255,255,255,.15);
    border-color: var(--primary);
}

.pklue-nav-avatar {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    margin-right: 4px;
}

/* ---------- Dropdown (nav only) ---------- */
.pklue-dropdown {
    position: relative;
}

.pklue-dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 180px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    padding: 6px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(4px);
    transition: all var(--transition);
    z-index: 200;
}

.pklue-dropdown:last-child .pklue-dropdown-menu { left: auto; right: 0; }

.pklue-dropdown:hover .pklue-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.pklue-dropdown-menu a {
    display: block;
    padding: 8px 16px;
    color: var(--text) !important;
    font-size: 14px;
    transition: background var(--transition);
}

.pklue-dropdown-menu a:hover {
    background: var(--primary-light);
    color: var(--primary) !important;
}

.pklue-dropdown-menu .divider {
    height: 1px;
    background: var(--border);
    margin: 4px 8px;
    border: none;
}

/* ---------- Card ---------- */
.pklue-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition);
    margin-bottom: 16px;
}

.pklue-card:hover { box-shadow: var(--shadow); }

.pklue-card-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.pklue-card-header h3 { font-size: 15px; font-weight: 600; }

.pklue-card-body { padding: 20px; }

.pklue-card-footer {
    padding: 12px 20px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: flex-end;
    gap: 8px;
}

/* ---------- Button ---------- */
.pklue-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border: none;
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    text-decoration: none !important;
    transition: all var(--transition);
    line-height: 1.4;
    white-space: nowrap;
}

.pklue-btn-primary { background: var(--primary); color: #fff !important; }
.pklue-btn-primary:hover { background: var(--primary-dark); color: #fff !important; }

.pklue-btn-success { background: var(--success); color: #fff !important; }
.pklue-btn-success:hover { opacity: .9; }

.pklue-btn-danger { background: var(--danger); color: #fff !important; }
.pklue-btn-danger:hover { opacity: .9; }

.pklue-btn-outline {
    background: transparent;
    color: var(--primary) !important;
    border: 1px solid var(--primary);
}
.pklue-btn-outline:hover { background: var(--primary-light); }

.pklue-btn-sm { padding: 5px 10px; font-size: 12px; }
.pklue-btn-lg { padding: 10px 20px; font-size: 16px; }
.pklue-btn:disabled { opacity: .5; cursor: not-allowed; }
.pklue-btn-group { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }

/* ---------- Table ---------- */
.pklue-table { width: 100%; border-collapse: collapse; }

.pklue-table th {
    padding: 10px 14px;
    text-align: left;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: .5px;
    border-bottom: 2px solid var(--border);
    background: var(--bg);
}

.pklue-table td {
    padding: 12px 14px;
    font-size: 14px;
    border-bottom: 1px solid var(--border);
}

.pklue-table tbody tr:hover td { background: var(--surface-hover); }

.pklue-table-bordered th, .pklue-table-bordered td { border: 1px solid var(--border); }

/* ---------- Form ---------- */
.pklue-form-group { margin-bottom: 16px; }

.pklue-form-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.pklue-form-inline {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
}

.pklue-form-actions {
    display: flex;
    gap: 8px;
    padding-top: 8px;
}

.pklue-input, .pklue-select, .pklue-textarea {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 14px;
    font-family: inherit;
    background: var(--surface);
    color: var(--text);
    transition: border-color var(--transition);
}

.pklue-input:focus, .pklue-select:focus, .pklue-textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.pklue-textarea { min-height: 100px; resize: vertical; }
.pklue-input-sm { padding: 6px 10px; font-size: 13px; }

/* Checkbox */
.pklue-checkbox {
    appearance: none;
    width: 18px;
    height: 18px;
    border: 2px solid var(--border);
    border-radius: 4px;
    cursor: pointer;
    transition: all var(--transition);
    position: relative;
    flex-shrink: 0;
}

.pklue-checkbox:checked {
    background: var(--primary);
    border-color: var(--primary);
}

.pklue-checkbox:checked::after {
    content: '';
    position: absolute;
    left: 5px;
    top: 2px;
    width: 5px;
    height: 9px;
    border: solid #fff;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

/* ---------- Grid ---------- */
.pklue-grid { display: grid; gap: 20px; }
.pklue-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.pklue-grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 20px; }
.pklue-grid-4 { display: grid; grid-template-columns: 1fr 1fr 1fr 1fr; gap: 20px; }
.pklue-grid-auto { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 20px; }

/* ---------- Badge ---------- */
.pklue-badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    border-radius: 100px;
    font-size: 12px;
    font-weight: 500;
}

.pklue-badge-green { background: var(--success-light); color: #065f46; }
.pklue-badge-red { background: var(--danger-light); color: #991b1b; }
.pklue-badge-amber { background: var(--warning-light); color: #92400e; }
.pklue-badge-blue { background: var(--primary-light); color: var(--primary-dark); }
.pklue-badge-gray { background: #f1f5f9; color: var(--text-secondary); }

/* ---------- Alert ---------- */
.pklue-alert {
    padding: 14px 18px;
    border-radius: var(--radius);
    font-size: 14px;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
    border: 1px solid transparent;
}

.pklue-alert-danger { background: var(--danger-light); border-color: #fecaca; color: #991b1b; }
.pklue-alert-success { background: var(--success-light); border-color: #a7f3d0; color: #065f46; }
.pklue-alert-warning { background: var(--warning-light); border-color: #fde68a; color: #92400e; }
.pklue-alert-info { background: var(--info-light); border-color: #c7d2fe; color: var(--primary-dark); }

/* ---------- Pagination ---------- */
.pklue-pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    padding: 16px 0;
}

.pklue-pagination button, .pklue-pagination a {
    padding: 6px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--surface);
    color: var(--text);
    cursor: pointer;
    font-size: 13px;
    font-family: inherit;
    transition: all var(--transition);
    text-decoration: none !important;
}

.pklue-pagination button:hover, .pklue-pagination a:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.pklue-pagination .active {
    background: var(--primary);
    color: #fff !important;
    border-color: var(--primary);
}

/* ---------- Footer ---------- */
.pklue-footer {
    background: var(--footer-bg);
    color: rgba(255,255,255,.7);
    padding: 40px 0 24px;
    margin-top: 40px;
}

.pklue-footer h4 {
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 12px;
}

.pklue-footer a { color: rgba(255,255,255,.6) !important; font-size: 13px; }
.pklue-footer a:hover { color: #fff !important; }

.pklue-footer-cols {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    gap: 0;
    margin-bottom: 32px;
}

.pklue-footer-col {
    flex: 1;
    max-width: 280px;
    text-align: center;
    padding: 0 32px;
    border-right: 1px solid rgba(255,255,255,.1);
}

.pklue-footer-col:last-child { border-right: none; }

.pklue-footer-col p {
    font-size: 13px;
    color: rgba(255,255,255,.6);
    margin-bottom: 4px;
}

.pklue-footer-copyright {
    text-align: center;
    padding-top: 24px;
    margin-top: 24px;
    border-top: 1px solid rgba(255,255,255,.1);
    font-size: 13px;
}

/* ---------- Modal ---------- */
.pklue-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.45);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: pklueFadeIn .2s;
}

.pklue-modal {
    background: var(--surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 90%;
    max-width: 520px;
    max-height: 80vh;
    overflow-y: auto;
    animation: pklueSlideUp .2s;
}

.pklue-modal-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-weight: 600;
}

.pklue-modal-body { padding: 20px; }

.pklue-modal-footer {
    padding: 12px 20px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: flex-end;
    gap: 8px;
}

@keyframes pklueFadeIn { from { opacity: 0 } to { opacity: 1 } }
@keyframes pklueSlideUp { from { opacity: 0; transform: translateY(20px) } to { opacity: 1; transform: translateY(0) } }

/* ---------- Loading ---------- */
.pklue-loading { display: flex; align-items: center; justify-content: center; padding: 40px; }

.pklue-spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: pklueSpin .6s linear infinite;
}

@keyframes pklueSpin { to { transform: rotate(360deg) } }

/* ---------- Empty state ---------- */
.pklue-empty {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
}

.pklue-empty .pklue-empty-icon { font-size: 48px; margin-bottom: 12px; }
.pklue-empty h3 { font-size: 16px; color: var(--text-secondary); margin-bottom: 4px; }
.pklue-empty p { font-size: 13px; }

/* ---------- Tabs ---------- */
.pklue-tabs {
    display: flex;
    border-bottom: 2px solid var(--border);
    gap: 0;
    margin-bottom: 16px;
}

.pklue-tab {
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: all var(--transition);
}

.pklue-tab:hover { color: var(--primary); }
.pklue-tab.active { color: var(--primary); border-bottom-color: var(--primary); }

/* ---------- Status dot ---------- */
.pklue-status {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    margin-right: 6px;
}
.pklue-status-green { background: var(--success); }
.pklue-status-red { background: var(--danger); }
.pklue-status-amber { background: var(--warning); }

/* ---------- Toolbar ---------- */
.pklue-toolbar {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.pklue-toolbar .pklue-input,
.pklue-toolbar .pklue-select { width: auto; min-width: 150px; }

/* ---------- Text utilities ---------- */
.pklue-text-sm { font-size: 13px; }
.pklue-text-xs { font-size: 12px; }
.pklue-text-muted { color: var(--text-muted); }
.pklue-text-secondary { color: var(--text-secondary); }
.pklue-text-success { color: var(--success); }
.pklue-text-danger { color: var(--danger); }
.pklue-text-center { text-align: center; }
.pklue-text-left { text-align: left; }
.pklue-text-right { text-align: right; }
.pklue-font-mono { font-family: var(--font-mono); }
.pklue-truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pklue-bold { font-weight: 600; }

/* ---------- Layout utilities ---------- */
.pklue-flex { display: flex; }
.pklue-flex-center { display: flex; align-items: center; justify-content: center; }
.pklue-flex-between { display: flex; align-items: center; justify-content: space-between; }
.pklue-flex-col { display: flex; flex-direction: column; }
.pklue-gap-sm { gap: 8px; }
.pklue-gap { gap: 12px; }
.pklue-gap-lg { gap: 20px; }

.pklue-mt { margin-top: 16px; }
.pklue-mb { margin-bottom: 16px; }
.pklue-mt-sm { margin-top: 8px; }
.pklue-mb-sm { margin-bottom: 8px; }
.pklue-ml-auto { margin-left: auto; }

.pklue-p { padding: 20px; }
.pklue-p-sm { padding: 12px; }

.pklue-rounded { border-radius: var(--radius); }
.pklue-rounded-lg { border-radius: var(--radius-lg); }
.pklue-shadow { box-shadow: var(--shadow); }
.pklue-border { border: 1px solid var(--border); }
.pklue-w-full { width: 100%; }
.pklue-hidden { display: none; }

/* ---------- Chips / Tag list ---------- */
.pklue-chip {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    border-radius: 100px;
    font-size: 12px;
    background: #f1f5f9;
    color: var(--text-secondary);
    margin: 2px;
}

/* ---------- Section ---------- */
.pklue-section-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: .5px;
    padding: 12px 0 8px;
    border-top: 1px solid var(--border);
}

.pklue-section-title:first-child { border-top: none; }

/* ---------- Stats card ---------- */
.pklue-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.pklue-stat-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 20px;
    box-shadow: var(--shadow-sm);
}

.pklue-stat-label { font-size: 13px; color: var(--text-secondary); margin-bottom: 4px; }
.pklue-stat-value { font-size: 28px; font-weight: 700; }

/* ---------- Chart box ---------- */
.pklue-chart-box {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.pklue-chart-box-header {
    padding: 14px 20px;
    border-bottom: 1px solid var(--border);
    font-weight: 600;
    font-size: 14px;
}

.pklue-chart-box-body { padding: 16px; height: 320px; }

/* ---------- Media ---------- */
.pklue-media { display: flex; gap: 16px; align-items: flex-start; }
.pklue-media-body { flex: 1; }

/* ---------- Breadcrumb ---------- */
.pklue-breadcrumb {
    padding: 12px 0;
    font-size: 13px;
    color: var(--text-muted);
}

.pklue-breadcrumb a { color: var(--text-secondary); }
.pklue-breadcrumb a:hover { color: var(--primary); }
.pklue-breadcrumb .sep { margin: 0 8px; color: var(--border); }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
    .pklue-grid-4 { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    .pklue-nav .pklue-container { flex-wrap: wrap; }
    .pklue-nav-links, .pklue-nav-right { display: none; }
    .pklue-nav-mobile-open .pklue-nav-links,
    .pklue-nav-mobile-open .pklue-nav-right { display: flex; flex-direction: column; width: 100%; }
    .pklue-nav-mobile-open { height: auto; padding: 12px 0; }
    .pklue-nav .pklue-dropdown-menu { position: static; box-shadow: none; border: none; padding-left: 16px; opacity: 1; visibility: visible; transform: none; background: transparent; }
    .pklue-nav .pklue-dropdown-menu a { color: rgba(255,255,255,.7) !important; }
    .pklue-nav-mobile-open .pklue-nav-links { gap: 0; }
    .pklue-nav-search .pklue-input { width: 100%; }

    .pklue-grid-2, .pklue-grid-3, .pklue-grid-4 { grid-template-columns: 1fr; }
    .pklue-footer-cols { flex-direction: column; align-items: center; }
    .pklue-footer-col { border-right: none; border-bottom: 1px solid rgba(255,255,255,.1); padding: 16px 0; max-width: 100%; }
    .pklue-footer-col:last-child { border-bottom: none; }
    .pklue-form-inline { grid-template-columns: 1fr; }
    .pklue-main { padding: 20px 0; }
    .pklue-stats { grid-template-columns: repeat(2, 1fr); }
    .pklue-table { font-size: 13px; }
    .pklue-table th, .pklue-table td { padding: 8px 10px; }

    .pklue-menu-toggle { display: block !important; background: none; border: none; color: #fff; font-size: 24px; cursor: pointer; padding: 4px; }
}

.pklue-menu-toggle { display: none; margin-left: auto; }

/* ============================================
   Admin Sidebar
   ============================================ */
.admin-sidebar {
    display: flex !important;
    flex-direction: column !important;
    gap: 2px !important;
}
.admin-sidebar a {
    display: block !important;
    padding: 10px 16px !important;
    color: var(--text-secondary) !important;
    text-decoration: none !important;
    border-radius: 8px !important;
    font-size: 14px !important;
    transition: all 0.2s ease !important;
    margin: 0 !important;
    border: none !important;
    white-space: nowrap !important;
}
.admin-sidebar a:hover {
    background: var(--surface-hover) !important;
    color: var(--text) !important;
}
.admin-sidebar a.active {
    background: var(--primary) !important;
    color: #ffffff !important;
    font-weight: 500 !important;
}

@media (max-width: 480px) {
    .pklue-stats { grid-template-columns: 1fr; }
}