/* ========== Reset & Variables ========== */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --primary:#6c5ce7;--primary-light:#a29bfe;--primary-dark:#5a4bd1;
  --secondary:#00b894;--danger:#d63031;--warning:#fdcb6e;--warning-dark:#e17055;--info:#0984e3;
  --bg:#f0f2f5;--card:#fff;--text:#2d3436;--text-secondary:#636e72;--border:#dfe6e9;
  --sidebar-w:230px;--header-h:56px;--radius:10px;
  --shadow:0 2px 12px rgba(0,0,0,.08);--shadow-lg:0 8px 30px rgba(0,0,0,.12);
}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC',sans-serif;background:var(--bg);color:var(--text);font-size:14px}
input,textarea,select,button{font-family:inherit;font-size:14px}
a{text-decoration:none;color:var(--primary)}
.hidden{display:none!important}

/* ========== Login ========== */
.login-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%)}
.login-box{background:#fff;border-radius:20px;padding:48px 40px;width:400px;box-shadow:var(--shadow-lg)}
.login-logo{text-align:center;margin-bottom:36px}
.logo-icon{font-size:48px;display:block;margin-bottom:12px}
.login-logo h1{font-size:22px;color:var(--text);margin-bottom:6px}
.login-logo p{color:var(--text-secondary);font-size:13px}
.login-form .form-group{margin-bottom:20px}
.login-form label{display:block;margin-bottom:6px;font-weight:500;color:var(--text)}
.login-form input{width:100%;padding:10px 14px;border:1.5px solid var(--border);border-radius:8px;outline:none;transition:border .2s}
.login-form input:focus{border-color:var(--primary)}
.btn-block{width:100%;padding:12px;font-size:16px}
.login-hint{text-align:center;color:var(--text-secondary);margin-top:14px;font-size:12px}

/* ========== Layout ========== */
.main-layout{display:flex;min-height:100vh}
.sidebar{width:var(--sidebar-w);background:#1e1e2e;color:#cdd6f4;display:flex;flex-direction:column;position:fixed;top:0;left:0;height:100vh;z-index:100;transition:transform .3s;overflow:hidden}
.sidebar-logo{display:flex;align-items:center;gap:10px;padding:18px 20px;font-size:15px;font-weight:700;color:#fff;border-bottom:1px solid rgba(255,255,255,.08);flex-shrink:0}
.sidebar-logo span:first-child{font-size:24px}
.sidebar-nav{flex:1;overflow-y:auto;padding:10px 0}
.sidebar-nav::-webkit-scrollbar{width:4px}
.sidebar-nav::-webkit-scrollbar-track{background:transparent}
.sidebar-nav::-webkit-scrollbar-thumb{background:rgba(255,255,255,.15);border-radius:4px}
.nav-group-title{padding:10px 20px 4px;font-size:10px;color:#6c7086;text-transform:uppercase;letter-spacing:.8px;margin-top:4px}
.nav-item{display:flex;align-items:center;gap:10px;padding:9px 20px;cursor:pointer;transition:all .2s;color:#cdd6f4;font-size:13px}
.nav-item:hover{background:rgba(255,255,255,.06);color:#fff}
.nav-item.active{background:var(--primary);color:#fff}
.nav-icon{font-size:15px;width:18px;text-align:center}
.sidebar-footer{padding:16px 20px;border-top:1px solid rgba(255,255,255,.08);flex-shrink:0}
.btn-logout{width:100%;padding:8px;background:rgba(255,255,255,.08);border:none;border-radius:8px;color:#cdd6f4;cursor:pointer;transition:background .2s;font-size:13px}
.btn-logout:hover{background:rgba(255,255,255,.15)}
.main-content{margin-left:var(--sidebar-w);flex:1;min-height:100vh;display:flex;flex-direction:column}
.top-bar{height:var(--header-h);background:#fff;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 24px;position:sticky;top:0;z-index:50;box-shadow:0 1px 4px rgba(0,0,0,.06)}
.top-bar-left{display:flex;align-items:center;gap:14px}
.sidebar-toggle{background:none;border:none;font-size:20px;cursor:pointer;color:var(--text-secondary)}
.breadcrumb{font-size:15px;font-weight:600;color:var(--text)}
.top-admin-tag{font-size:12px;background:#ede9fe;color:var(--primary);padding:4px 10px;border-radius:20px;font-weight:500}
.page-content{padding:24px;flex:1}

/* ========== Stat Cards ========== */
.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:16px;margin-bottom:20px}
.stat-card{background:var(--card);border-radius:var(--radius);padding:18px 20px;box-shadow:var(--shadow);display:flex;align-items:center;gap:14px}
.stat-icon{width:50px;height:50px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:22px;flex-shrink:0}
.stat-icon.purple{background:#ede9fe}.stat-icon.green{background:#d1fae5}
.stat-icon.blue{background:#dbeafe}.stat-icon.orange{background:#fef3c7}
.stat-icon.red{background:#fee2e2}.stat-icon.pink{background:#fce7f3}
.stat-icon.teal{background:#ccfbf1}.stat-icon.yellow{background:#fef9c3}
.stat-value{font-size:24px;font-weight:700;color:var(--text);line-height:1.2}
.stat-label{font-size:12px;color:var(--text-secondary);margin-top:2px}
.stat-sub{font-size:11px;color:var(--secondary);margin-top:4px}

/* ========== Card ========== */
.card{background:var(--card);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);margin-bottom:20px}
.card-title{font-size:15px;font-weight:600;margin-bottom:16px;color:var(--text);display:flex;align-items:center;gap:8px}
.card-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.card-header .card-title{margin-bottom:0}

/* ========== Charts ========== */
.chart-container{width:100%;height:280px}
.chart-container-lg{width:100%;height:340px}
.chart-row{display:grid;gap:16px;margin-bottom:20px}
.chart-row-2{grid-template-columns:1fr 1fr}
.chart-row-3{grid-template-columns:1fr 1fr 1fr}

/* ========== Buttons ========== */
.btn{display:inline-flex;align-items:center;gap:6px;padding:7px 16px;border-radius:8px;border:none;cursor:pointer;font-size:13px;font-weight:500;transition:all .2s;white-space:nowrap}
.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-dark)}
.btn-secondary{background:#f1f5f9;color:var(--text);border:1px solid var(--border)}.btn-secondary:hover{background:var(--border)}
.btn-success{background:var(--secondary);color:#fff}.btn-success:hover{background:#00a381}
.btn-danger{background:var(--danger);color:#fff}.btn-danger:hover{background:#c0392b}
.btn-warning{background:var(--warning-dark);color:#fff}.btn-warning:hover{background:#d35400}
.btn-info{background:var(--info);color:#fff}.btn-info:hover{background:#0773c5}
.btn-sm{padding:4px 10px;font-size:12px;border-radius:6px}
.btn-xs{padding:2px 8px;font-size:11px;border-radius:4px}
.btn-group{display:flex;gap:8px;flex-wrap:wrap}

/* ========== Table ========== */
.table-wrapper{overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:13px}
thead th{text-align:left;padding:10px 14px;background:#f8fafc;color:var(--text-secondary);font-weight:600;border-bottom:2px solid var(--border);white-space:nowrap}
tbody td{padding:10px 14px;border-bottom:1px solid var(--border);vertical-align:middle}
tbody tr:hover{background:#f8fafc}
.table-actions{display:flex;gap:5px;flex-wrap:wrap;align-items:center}

/* ========== Toolbar ========== */
.toolbar{display:flex;gap:10px;margin-bottom:16px;flex-wrap:wrap;align-items:center}
.toolbar-left{display:flex;gap:8px;flex:1;flex-wrap:wrap;align-items:center}
.toolbar-right{display:flex;gap:8px;flex-shrink:0}
.search-input{padding:7px 12px;border:1.5px solid var(--border);border-radius:8px;outline:none;min-width:180px;transition:border .2s}
.search-input:focus{border-color:var(--primary)}
.filter-select{padding:7px 10px;border:1.5px solid var(--border);border-radius:8px;outline:none;background:#fff;cursor:pointer;color:var(--text)}
.filter-select:focus{border-color:var(--primary)}

/* ========== Pagination ========== */
.pagination{display:flex;align-items:center;justify-content:space-between;margin-top:16px;flex-wrap:wrap;gap:8px}
.pagination-info{color:var(--text-secondary);font-size:13px}
.pagination-btns{display:flex;gap:4px}
.page-btn{padding:5px 10px;border:1.5px solid var(--border);border-radius:6px;background:#fff;cursor:pointer;font-size:13px;transition:all .2s}
.page-btn:hover,.page-btn.active{background:var(--primary);color:#fff;border-color:var(--primary)}
.page-btn:disabled{opacity:.4;cursor:not-allowed}

/* ========== Badge ========== */
.badge{display:inline-block;padding:2px 8px;border-radius:20px;font-size:11px;font-weight:600;white-space:nowrap}
.badge-success{background:#d1fae5;color:#065f46}
.badge-danger{background:#fee2e2;color:#991b1b}
.badge-warning{background:#fef3c7;color:#92400e}
.badge-info{background:#dbeafe;color:#1e40af}
.badge-gray{background:#f1f5f9;color:#475569}
.badge-purple{background:#ede9fe;color:#5b21b6}
.badge-teal{background:#ccfbf1;color:#134e4a}
.badge-orange{background:#ffedd5;color:#9a3412}

/* ========== Forms ========== */
.form-group{margin-bottom:16px}
.form-group label{display:block;margin-bottom:6px;font-weight:500;color:var(--text)}
.form-group input,.form-group textarea,.form-group select{width:100%;padding:8px 12px;border:1.5px solid var(--border);border-radius:8px;outline:none;transition:border .2s;background:#fff;color:var(--text)}
.form-group input:focus,.form-group textarea:focus,.form-group select:focus{border-color:var(--primary)}
.form-group textarea{resize:vertical;min-height:80px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-row-3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:16px}
.form-hint{font-size:12px;color:var(--text-secondary);margin-top:4px}
.form-switch{display:flex;align-items:center;gap:8px;padding:6px 0}
.switch{position:relative;width:44px;height:24px;flex-shrink:0}
.switch input{opacity:0;width:0;height:0}
.switch-slider{position:absolute;cursor:pointer;inset:0;background:#cbd5e1;border-radius:24px;transition:.3s}
.switch-slider:before{position:absolute;content:'';height:18px;width:18px;left:3px;bottom:3px;background:white;border-radius:50%;transition:.3s}
.switch input:checked+.switch-slider{background:var(--primary)}
.switch input:checked+.switch-slider:before{transform:translateX(20px)}
.radio-free{color:var(--secondary);font-weight:600}
.radio-paid{color:var(--warning-dark);font-weight:600}

/* ========== Modal ========== */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.45);display:flex;align-items:center;justify-content:center;z-index:1000}
.modal{background:#fff;border-radius:14px;width:580px;max-width:96vw;max-height:92vh;display:flex;flex-direction:column;box-shadow:var(--shadow-lg)}
.modal-lg{width:800px}
.modal-xl{width:960px}
.modal-header{display:flex;align-items:center;justify-content:space-between;padding:18px 24px;border-bottom:1px solid var(--border)}
.modal-header h3{font-size:16px;font-weight:600}
.modal-close{background:none;border:none;font-size:18px;cursor:pointer;color:var(--text-secondary)}
.modal-body{padding:20px 24px;overflow-y:auto;flex:1}
.modal-footer{padding:14px 24px;border-top:1px solid var(--border);display:flex;justify-content:flex-end;gap:10px}

/* ========== Toast ========== */
.toast{position:fixed;bottom:30px;left:50%;transform:translateX(-50%);background:#1e1e2e;color:#fff;padding:10px 22px;border-radius:30px;font-size:13px;z-index:2000;box-shadow:var(--shadow-lg);animation:slideUp .3s ease}
.toast.success{background:var(--secondary)}
.toast.error{background:var(--danger)}
@keyframes slideUp{from{opacity:0;transform:translateX(-50%) translateY(10px)}to{opacity:1;transform:translateX(-50%) translateY(0)}}

/* ========== Cover & Avatar ========== */
.cover-preview{width:52px;height:70px;object-fit:cover;border-radius:4px;background:var(--border)}
.avatar-preview{width:34px;height:34px;object-fit:cover;border-radius:50%;background:var(--border)}

/* ========== Loading / Empty ========== */
.loading{display:flex;align-items:center;justify-content:center;padding:60px;color:var(--text-secondary)}
.spinner{width:24px;height:24px;border:3px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .7s linear infinite;margin-right:8px}
@keyframes spin{to{transform:rotate(360deg)}}
.empty{display:flex;flex-direction:column;align-items:center;padding:60px;color:var(--text-secondary)}
.empty-icon{font-size:48px;margin-bottom:12px;opacity:.5}

/* ========== Top List ========== */
.top-list{list-style:none}
.top-list li{display:flex;align-items:center;padding:8px 0;border-bottom:1px solid var(--border);gap:10px}
.top-list li:last-child{border-bottom:none}
.rank-no{width:22px;height:22px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;flex-shrink:0}
.rank-1{background:#fef9c3;color:#a16207}
.rank-2{background:#f1f5f9;color:#475569}
.rank-3{background:#ffedd5;color:#9a3412}
.rank-n{background:var(--bg);color:var(--text-secondary)}
.top-list .name{flex:1;font-size:13px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.top-list .val{font-size:12px;color:var(--text-secondary);white-space:nowrap}

/* ========== Chapter List ========== */
.chapter-list{max-height:320px;overflow-y:auto}
.chapter-item{display:flex;align-items:center;padding:8px 12px;border:1px solid var(--border);border-radius:8px;margin-bottom:6px;gap:10px}
.chapter-item:hover{background:#f8fafc}
.chapter-idx{color:var(--text-secondary);font-size:11px;min-width:32px}
.chapter-name{flex:1;font-size:13px}
.chapter-words{font-size:11px;color:var(--text-secondary)}

/* ========== Progress Bar ========== */
.progress-bar{height:6px;background:var(--border);border-radius:3px;overflow:hidden}
.progress-fill{height:100%;background:var(--primary);border-radius:3px}

/* ========== Category Manager ========== */
.cat-list{list-style:none}
.cat-item{display:flex;align-items:center;padding:10px 14px;border:1px solid var(--border);border-radius:8px;margin-bottom:8px;gap:12px;background:#fff}
.cat-item:hover{background:#f8fafc}
.cat-name{flex:1;font-size:14px;font-weight:500}
.cat-sort{font-size:12px;color:var(--text-secondary);min-width:50px}

/* ========== Order Status ========== */
.order-status-paid{color:var(--warning-dark);font-weight:600}
.order-status-shipped{color:var(--info);font-weight:600}
.order-status-done{color:var(--secondary);font-weight:600}

/* ========== Novel type selector ========== */
.type-selector{display:flex;gap:0;border:1.5px solid var(--border);border-radius:8px;overflow:hidden;margin-bottom:16px}
.type-btn{flex:1;padding:8px;text-align:center;cursor:pointer;transition:all .2s;font-size:13px;font-weight:500;border:none;background:#fff;color:var(--text-secondary)}
.type-btn.active-free{background:#d1fae5;color:#065f46}
.type-btn.active-paid{background:#ffedd5;color:#9a3412}
.free-section,.paid-section{display:none}
.free-section.show,.paid-section.show{display:block}

/* ========== Responsive ========== */
@media(max-width:768px){
  .sidebar{transform:translateX(-100%)}
  .sidebar.open{transform:translateX(0)}
  .main-content{margin-left:0}
  .form-row,.form-row-3{grid-template-columns:1fr}
  .stat-grid{grid-template-columns:1fr 1fr}
  .chart-row-2,.chart-row-3{grid-template-columns:1fr}
}