* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary: #0F6E56;
  --primary-light: #E8F5F0;
  --primary-dark: #085041;
  --bg: #F3F4F6;
  --bg-card: #ffffff;
  --text-dark: #1F2937;
  --text-body: #4B5563;
  --text-muted: #9CA3AF;
  --border: #E5E7EB;
  --danger: #EF4444;
  --danger-light: #FEE2E2;
  --warning: #F59E0B;
  --warning-light: #FEF3C7;
  --success: #10B981;
  --sidebar-w: 240px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--bg);
  color: var(--text-dark);
  font-size: 14px;
  line-height: 1.5;
}

/* Layout */
.layout {
  display: flex;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-w);
  background: var(--primary-dark);
  color: #ffffff;
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 10;
}

.sidebar-logo {
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.logo-icon {
  font-size: 24px;
}

.logo-text {
  font-size: 16px;
  font-weight: 700;
}

.sidebar-nav {
  flex: 1;
  padding: 12px 0;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s;
  font-size: 14px;
}

.nav-item:hover {
  background: rgba(255,255,255,0.1);
  color: #ffffff;
}

.nav-item.active {
  background: var(--primary);
  color: #ffffff;
  font-weight: 500;
}

.nav-icon {
  font-size: 18px;
  width: 24px;
  text-align: center;
}

.sidebar-footer {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 8px 0;
}

/* Main Content */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-w);
  padding: 24px;
  min-height: 100vh;
}

.page-container {
  max-width: 1200px;
}

/* Page Header */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}

.page-title {
  font-size: 22px;
  font-weight: 700;
}

/* Cards */
.card {
  background: var(--bg-card);
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  background: var(--bg-card);
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}

.stat-card-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.stat-card-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-dark);
}

.stat-card-sub {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}

.stat-card-sub .green { color: var(--success); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
  font-family: inherit;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
}

.btn-outline {
  background: transparent;
  color: var(--text-body);
  border: 1px solid var(--border);
}

.btn-outline:hover {
  background: var(--bg);
}

.btn-danger {
  background: var(--danger-light);
  color: var(--danger);
}

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

.btn-sm {
  padding: 4px 10px;
  font-size: 12px;
}

/* Tables */
.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th {
  text-align: left;
  padding: 10px 12px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

td {
  padding: 12px;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
  vertical-align: middle;
}

tr:hover td {
  background: #FAFAFA;
}

/* Toolbar */
.toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.search-input {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 13px;
  width: 240px;
  outline: none;
  font-family: inherit;
}

.search-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px var(--primary-light);
}

.filter-select {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 13px;
  outline: none;
  background: #fff;
  font-family: inherit;
  cursor: pointer;
}

/* Badges */
.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 500;
}

.badge-free { background: var(--bg); color: var(--text-muted); }
.badge-annual { background: var(--primary-light); color: var(--primary); }
.badge-lifetime { background: var(--warning-light); color: #92400E; }
.badge-vip { background: var(--warning-light); color: #92400E; }
.badge-green { background: var(--primary-light); color: var(--primary); }

/* Pagination */
.pagination {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 16px;
  font-size: 13px;
  color: var(--text-muted);
}

.pagination-btns {
  display: flex;
  gap: 4px;
}

.page-btn {
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
  cursor: pointer;
  font-size: 13px;
  font-family: inherit;
}

.page-btn:hover {
  background: var(--bg);
}

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

.page-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0,0,0,0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.modal {
  background: #fff;
  border-radius: 16px;
  width: 600px;
  max-width: 90vw;
  max-height: 85vh;
  overflow-y: auto;
  box-shadow: 0 20px 60px rgba(0,0,0,0.15);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
}

.modal-header h3 {
  font-size: 17px;
  font-weight: 600;
}

.modal-close {
  width: 32px;
  height: 32px;
  border: none;
  background: var(--bg);
  border-radius: 8px;
  font-size: 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
}

.modal-close:hover {
  background: var(--danger-light);
  color: var(--danger);
}

.modal-body {
  padding: 24px;
}

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

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

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  outline: none;
  font-family: inherit;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px var(--primary-light);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.form-check {
  display: flex;
  align-items: center;
  gap: 8px;
}

.form-check input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--primary);
}

.form-actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

/* Top articles list */
.top-list {
  list-style: none;
}

.top-list li {
  display: flex;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  gap: 12px;
}

.top-list li:last-child {
  border-bottom: none;
}

.top-rank {
  width: 24px;
  height: 24px;
  border-radius: 6px;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  color: var(--text-muted);
  flex-shrink: 0;
}

.top-rank.gold { background: #FEF3C7; color: #92400E; }
.top-rank.silver { background: #F3F4F6; color: #6B7280; }
.top-rank.bronze { background: #FED7AA; color: #9A3412; }

.top-title {
  flex: 1;
  font-size: 13px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.top-reads {
  font-size: 12px;
  color: var(--text-muted);
  flex-shrink: 0;
}

/* Truncate text */
.truncate {
  max-width: 300px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Empty state */
.empty-state {
  text-align: center;
  padding: 40px;
  color: var(--text-muted);
}

/* Login Page */
.login-page {
  min-height: 100vh;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
}

.login-card {
  background: #fff;
  border-radius: 16px;
  padding: 40px 36px;
  width: 380px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.08);
  text-align: center;
}

.login-logo {
  font-size: 48px;
  margin-bottom: 8px;
}

.login-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 28px;
}