/* Northlight Dance Academy (北光舞蹈学院) — Base Stylesheet
   Shared across Essential, Pro, Parent Portal, and Admin ERP.
   Vanilla CSS only. Dark Stage & Northern Light Aurora aesthetic.
*/

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=Space+Grotesk:wght@600;700&display=swap');

:root {
  /* Colors — Dark Stage Base (Strictly no warm white / oatmeal) */
  --color-bg: #0B0E1E;
  --color-bg-alt: #0F1328;
  --color-surface: #14182E;
  --color-surface-hover: #1A213D;
  --color-surface-elevated: #1F2748;
  --color-border: #262E52;
  --color-border-hover: #3E4B7E;
  --color-border-subtle: #1C2340;

  /* Primary Accent: Northern Lights Electric Iris / Violet */
  --color-primary: #8B5CF6;
  --color-primary-glow: rgba(139, 92, 246, 0.28);
  --color-primary-dark: #7C3AED;
  --color-primary-light: #A78BFA;

  /* Secondary Accents */
  --color-accent-pink: #FF3E6C;
  --color-accent-pink-glow: rgba(255, 62, 108, 0.25);
  --color-accent-cyan: #06B6D4;
  --color-accent-amber: #FBBF24;

  /* Text & Typography */
  --color-text-main: #F8FAFC;
  --color-text-muted: #94A3B8;
  --color-text-dim: #64748B;
  --color-text-inverse: #0B0E1E;

  /* Functional Status */
  --color-success: #10B981;
  --color-warning: #F59E0B;
  --color-error: #EF4444;

  /* Shadows & Glow */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.55);
  --shadow-glow: 0 0 24px rgba(139, 92, 246, 0.25);
  --shadow-glow-pink: 0 0 24px rgba(255, 62, 108, 0.25);

  /* Dimensions & Spacing */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  --demo-bar-height: 48px;

  /* Fonts */
  --font-sans: 'Plus Jakarta Sans', system-ui, -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --font-display: 'Space Grotesk', 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
}

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

html {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--color-bg);
  background-image: radial-gradient(circle at 50% 0%, rgba(139, 92, 246, 0.08) 0%, transparent 60%);
  overflow-x: hidden;
  padding-bottom: calc(var(--demo-bar-height) + 40px);
}

img, svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.15s ease;
}

/* Accessibility */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

.skip-link {
  position: absolute;
  top: -60px;
  left: 16px;
  background: var(--color-primary);
  color: #FFFFFF;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  z-index: 9999;
  transition: top 0.2s ease;
}
.skip-link:focus {
  top: 16px;
}

/* Layout Utilities */
.container {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

.container-wide {
  width: 100%;
  max-width: 1360px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

.admin-container {
  width: 100%;
  max-width: 1420px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 16px;
  padding-right: 16px;
}

.section {
  padding-top: 72px;
  padding-bottom: 72px;
}

.section-sm {
  padding-top: 40px;
  padding-bottom: 40px;
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 48px;
}

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary-light);
  margin-bottom: 12px;
}

.section-title {
  font-family: var(--font-display);
  font-size: 34px;
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-text-main);
  margin-bottom: 14px;
  letter-spacing: -0.02em;
}

.section-desc {
  font-size: 16px;
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* Grids */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; gap: 20px; }
  .section { padding-top: 48px; padding-bottom: 48px; }
  .section-title { font-size: 26px; }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease;
  min-height: 44px;
  white-space: nowrap;
  user-select: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: #FFFFFF;
  border-color: rgba(255, 255, 255, 0.15);
  box-shadow: 0 4px 12px rgba(139, 92, 246, 0.35);
}
.btn-primary:hover {
  background: linear-gradient(135deg, #996bf8, #6d28d9);
  box-shadow: 0 6px 18px rgba(139, 92, 246, 0.5);
  transform: translateY(-1px);
}

.btn-coral {
  background: linear-gradient(135deg, var(--color-accent-pink), #e11d48);
  color: #FFFFFF;
  box-shadow: 0 4px 12px rgba(255, 62, 108, 0.35);
}
.btn-coral:hover {
  background: linear-gradient(135deg, #ff527b, #be123c);
  box-shadow: 0 6px 18px rgba(255, 62, 108, 0.5);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text-main);
  border-color: var(--color-border);
}
.btn-secondary:hover {
  background: var(--color-surface-hover);
  border-color: var(--color-border-hover);
  color: #FFFFFF;
}

.btn-outline {
  background: transparent;
  color: var(--color-text-main);
  border-color: var(--color-border);
}
.btn-outline:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--color-border-hover);
}

.btn-sm {
  padding: 8px 14px;
  font-size: 13px;
  min-height: 36px;
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 14px 28px;
  font-size: 16px;
  min-height: 50px;
  border-radius: var(--radius-md);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  font-size: 12px;
  font-weight: 600;
  border-radius: var(--radius-full);
  line-height: 1.2;
}

.badge-purple {
  background: rgba(139, 92, 246, 0.18);
  color: var(--color-primary-light);
  border: 1px solid rgba(139, 92, 246, 0.35);
}

.badge-coral {
  background: rgba(255, 62, 108, 0.18);
  color: #ff7597;
  border: 1px solid rgba(255, 62, 108, 0.35);
}

.badge-cyan {
  background: rgba(6, 182, 212, 0.18);
  color: #38bdf8;
  border: 1px solid rgba(6, 182, 212, 0.35);
}

.badge-gold {
  background: rgba(251, 191, 36, 0.18);
  color: #fcd34d;
  border: 1px solid rgba(251, 191, 36, 0.35);
}

.badge-gray {
  background: rgba(148, 163, 184, 0.15);
  color: var(--color-text-muted);
  border: 1px solid rgba(148, 163, 184, 0.25);
}

/* Cards & Surfaces */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all 0.2s ease;
  position: relative;
  overflow: hidden;
}

.card:hover {
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-md);
}

.card-clickable {
  cursor: pointer;
}
.card-clickable:hover {
  transform: translateY(-3px);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-glow);
}

/* Forms */
.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-main);
  margin-bottom: 8px;
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 11px 14px;
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--color-text-main);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
  min-height: 44px;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.2);
}

.form-textarea {
  min-height: 100px;
  resize: vertical;
}

.form-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

@media (max-width: 640px) {
  .form-row { grid-template-columns: 1fr; }
}

.form-error {
  font-size: 12px;
  color: var(--color-error);
  margin-top: 5px;
  display: none;
}
.form-group.has-error .form-error {
  display: block;
}
.form-group.has-error .form-input,
.form-group.has-error .form-select {
  border-color: var(--color-error);
}

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 14, 30, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-border-subtle);
  height: 72px;
  display: flex;
  align-items: center;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
  color: #FFFFFF;
  text-decoration: none;
  white-space: nowrap;
}

.brand-icon-wrap {
  width: 36px;
  height: 36px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent-pink));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFFFFF;
  box-shadow: 0 2px 8px rgba(139, 92, 246, 0.4);
}

.brand-logo-text {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: #FFFFFF;
  line-height: 1.1;
}

.brand-sub {
  font-size: 11px;
  font-weight: 500;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.main-nav a {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-muted);
  transition: color 0.15s ease;
  position: relative;
  padding: 6px 0;
}

.main-nav a:hover, .main-nav a.active {
  color: #FFFFFF;
}

.main-nav a.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

/* Language Toggle Capsule */
.lang-toggle {
  display: inline-flex;
  align-items: center;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  padding: 3px;
  font-size: 12px;
  font-weight: 600;
}

.lang-btn {
  background: transparent;
  border: none;
  color: var(--color-text-muted);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all 0.15s ease;
  font-family: var(--font-sans);
  min-height: 28px;
}

.lang-btn.active {
  background: var(--color-primary);
  color: #FFFFFF;
}

.menu-btn {
  display: none;
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text-main);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

@media (max-width: 900px) {
  .main-nav { display: none; }
  .menu-btn { display: inline-flex; }
  .header-actions .btn-header-cta { display: none; }
}

/* Mobile Nav Drawer */
.mobile-nav-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(4px);
  z-index: 998;
  opacity: 0;
  visibility: hidden;
  transition: all 0.25s ease;
}

.mobile-nav-backdrop.open {
  opacity: 1;
  visibility: visible;
}

.mobile-drawer {
  position: fixed;
  top: 0;
  right: -320px;
  width: 300px;
  max-width: 85vw;
  height: 100%;
  background: var(--color-surface);
  border-left: 1px solid var(--color-border);
  z-index: 999;
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  transition: right 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  overflow-y: auto;
}

.mobile-drawer.open {
  right: 0;
}

.mobile-drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
}

.mobile-drawer-close {
  background: transparent;
  border: none;
  color: var(--color-text-muted);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.mobile-nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 32px;
}

.mobile-nav-list a {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text-main);
  display: block;
  padding: 8px 0;
}

.mobile-nav-list a.active {
  color: var(--color-primary-light);
}

/* Footer */
.site-footer {
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  padding-top: 56px;
  padding-bottom: 32px;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  margin-bottom: 48px;
}

@media (max-width: 900px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 600px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
}

.footer-brand p {
  font-size: 14px;
  color: var(--color-text-muted);
  margin-top: 14px;
  line-height: 1.6;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 14px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #FFFFFF;
  margin-bottom: 18px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  font-size: 14px;
  color: var(--color-text-muted);
}
.footer-links a:hover {
  color: #FFFFFF;
}

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--color-border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 13px;
  color: var(--color-text-dim);
  flex-wrap: wrap;
}

/* Responsive Table Wrapper */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 16px 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

.table-dance {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  text-align: left;
}

.table-dance th {
  background: var(--color-surface);
  color: #FFFFFF;
  font-weight: 700;
  padding: 14px 16px;
  border-bottom: 1px solid var(--color-border);
  white-space: nowrap;
}

.table-dance td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--color-border-subtle);
  color: var(--color-text-main);
  background: var(--color-bg-alt);
}

.table-dance tr:last-child td {
  border-bottom: none;
}

.table-dance tr:hover td {
  background: var(--color-surface);
}

/* Modals */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(6px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  visibility: hidden;
  transition: all 0.2s ease;
}

.modal-backdrop.open {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border-hover);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 580px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  padding: 28px;
  position: relative;
  transform: scale(0.96);
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-backdrop.open .modal {
  transform: scale(1);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--color-border);
}

.modal-title {
  font-size: 20px;
  font-weight: 700;
  color: #FFFFFF;
}

.modal-close {
  background: transparent;
  border: none;
  color: var(--color-text-muted);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  border-radius: 6px;
}
.modal-close:hover {
  color: #FFFFFF;
  background: rgba(255, 255, 255, 0.1);
}

/* Toast */
.toast-container {
  position: fixed;
  bottom: calc(var(--demo-bar-height) + 20px);
  right: 20px;
  z-index: 990;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}

.toast {
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-primary);
  color: #FFFFFF;
  padding: 12px 18px;
  border-radius: var(--radius-md);
  font-size: 13px;
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: 10px;
  animation: toastIn 0.25s ease forwards;
}

@keyframes toastIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Fixed Bottom Concept Demo Bar (Mandatory Rule) */
.demo-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--demo-bar-height);
  background: rgba(14, 18, 38, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-top: 1px solid rgba(139, 92, 246, 0.35);
  z-index: 900;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  font-size: 12px;
  color: var(--color-text-muted);
}

.demo-bar-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.demo-badge {
  background: rgba(139, 92, 246, 0.25);
  color: #C4B5FD;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
  text-transform: uppercase;
  font-size: 10px;
  letter-spacing: 0.05em;
  border: 1px solid rgba(139, 92, 246, 0.4);
}

.demo-bar-text {
  white-space: nowrap;
}

.demo-bar-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Tier Switcher Capsule */
.demo-tier-pill {
  display: inline-flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  padding: 2px;
}

.demo-tier-btn {
  background: transparent;
  border: none;
  color: var(--color-text-muted);
  font-size: 11px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  cursor: pointer;
  text-decoration: none;
  transition: all 0.15s ease;
}

.demo-tier-btn.active {
  background: var(--color-primary);
  color: #FFFFFF;
}

.demo-reset-btn {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 11px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  min-height: 28px;
}
.demo-reset-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #FFFFFF;
}

/* Mobile Demo Bar Compression (strictly single line <= 48px) */
@media (max-width: 640px) {
  .demo-bar {
    height: 44px;
    padding: 0 10px;
  }
  .demo-bar-text {
    display: none;
  }
  .demo-tier-btn {
    padding: 3px 8px;
    font-size: 10px;
  }
  .demo-reset-btn {
    padding: 3px 8px;
    font-size: 10px;
  }
}

/* Admin Shell Layout Styles (for migrated Admin ERP) */
.adm-app {
  display: flex;
  min-height: calc(100vh - var(--demo-bar-height) - 40px);
}

.adm-side {
  width: 250px;
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.side-brand {
  display: flex;
  flex-direction: column;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border-subtle);
}

.side-eyebrow {
  font-size: 11px;
  font-weight: 600;
  color: var(--color-primary-light);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.side-name {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: #FFFFFF;
}
.side-name.accent {
  color: var(--color-accent-pink);
  font-size: 14px;
}

.side-group {
  font-size: 11px;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--color-text-dim);
  letter-spacing: 0.06em;
  margin: 18px 0 8px;
  padding-left: 10px;
}

.side-nav {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.side-nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-muted);
  transition: all 0.15s ease;
}

.side-nav a:hover {
  background: var(--color-surface-hover);
  color: #FFFFFF;
}

.side-nav a.active {
  background: linear-gradient(90deg, rgba(139, 92, 246, 0.25), rgba(139, 92, 246, 0.08));
  color: #FFFFFF;
  border-left: 3px solid var(--color-primary);
}

.side-foot {
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--color-border-subtle);
  font-size: 11px;
  color: var(--color-text-dim);
}

.adm-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  background: var(--color-bg);
}

.adm-topbar {
  height: 60px;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
}

.adm-main {
  flex: 1;
  padding: 24px;
  overflow-y: auto;
}

.adm-banner {
  background: rgba(139, 92, 246, 0.12);
  border-bottom: 1px solid rgba(139, 92, 246, 0.3);
  padding: 8px 24px;
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  color: #DDD6FE;
}

.adm-banner-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.banner-btn {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #FFFFFF;
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
}

@media (max-width: 900px) {
  .adm-app { flex-direction: column; }
  .adm-side { width: 100%; border-right: none; border-bottom: 1px solid var(--color-border); }
  .adm-main { padding: 16px; }
}