:root {
  --apple-blue: #007AFF;
  --apple-green: #34C759;
  --apple-red: #FF3B30;
  --apple-orange: #FF9500;
  --apple-purple: #AF52DE;
  --apple-pink: #FF2D55;
  --apple-teal: #5AC8FA;
  --apple-gray: #8E8E93;
  --apple-gray-2: #AEAEB2;
  --apple-gray-3: #C7C7CC;
  --apple-gray-4: #D1D1D6;
  --apple-gray-5: #E5E5EA;
  --apple-gray-6: #F2F2F7;
  --apple-bg: #FFFFFF;
  --apple-text: #1D1D1F;
  --apple-text-secondary: #86868B;
  --apple-border: rgba(0, 0, 0, 0.1);
  --apple-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
  --apple-shadow-lg: 0 4px 20px rgba(0, 0, 0, 0.12);
  --apple-radius: 12px;
  --apple-radius-lg: 20px;
  --apple-transition: all 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
  --safe-area-bottom: env(safe-area-inset-bottom, 0px);
}

* {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'Helvetica Neue', Arial, sans-serif;
  background-color: var(--apple-gray-6);
  color: var(--apple-text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  margin: 0;
  padding: 0;
  min-height: 100vh;
  min-height: -webkit-fill-available;
  overflow-x: hidden;
}

body.logged-in {
  background-color: var(--apple-gray-6);
}

.navbar-brand {
  font-weight: 600;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.code-font {
  font-family: 'SF Mono', 'Menlo', 'Monaco', 'Courier New', monospace;
  font-size: 0.85rem;
  word-break: break-all;
}

.card {
  background: var(--apple-bg);
  border: none;
  border-radius: var(--apple-radius-lg);
  box-shadow: var(--apple-shadow);
  transition: var(--apple-transition);
}

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

.card-header {
  background-color: transparent;
  border-bottom: 1px solid var(--apple-border);
  padding: 1.25rem 1.5rem;
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: -0.01em;
}

.card-body {
  padding: 1.5rem;
}

.node-item {
  padding: 1rem 1.25rem;
  border-radius: var(--apple-radius);
  margin-bottom: 0.5rem;
  background: var(--apple-bg);
  border: 1px solid var(--apple-border);
  transition: var(--apple-transition);
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
  -webkit-tap-highlight-color: transparent;
}

.node-item:hover {
  background: var(--apple-gray-6);
}

.node-item:active {
  background: var(--apple-gray-5);
}

.node-item:last-child {
  margin-bottom: 0;
}

.node-name {
  font-weight: 500;
  color: var(--apple-text);
  letter-spacing: -0.01em;
  word-break: break-word;
}

.node-type {
  font-size: 0.65rem;
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  font-weight: 500;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.node-source {
  font-size: 0.8rem;
  color: var(--apple-text-secondary);
}

.subscription-card {
  background: var(--apple-bg);
  border-radius: var(--apple-radius-lg);
  border: 1px solid var(--apple-border);
  transition: var(--apple-transition);
}

.subscription-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--apple-shadow-lg);
}

.subscription-traffic {
  font-size: 0.9rem;
  font-weight: 500;
}

.subscription-expiry {
  font-size: 0.85rem;
}

.subscription-expiry.warning {
  color: var(--apple-orange);
}

.subscription-expiry.danger {
  color: var(--apple-red);
}

.badge-type-vmess { 
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); 
  color: white;
}
.badge-type-vless { 
  background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%); 
  color: white;
}
.badge-type-trojan { 
  background: linear-gradient(135deg, #ee0979 0%, #ff6a00 100%); 
  color: white;
}
.badge-type-ss { 
  background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%); 
  color: white;
}
.badge-type-ssr { 
  background: linear-gradient(135deg, #20c997 0%, #38ef7d 100%); 
  color: white;
}
.badge-type-hysteria { 
  background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%); 
  color: white;
}
.badge-type-hysteria2 { 
  background: linear-gradient(135deg, #fa709a 0%, #fee140 100%); 
  color: white;
}
.badge-type-tuic { 
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); 
  color: white;
}

.btn {
  font-weight: 500;
  letter-spacing: -0.01em;
  border-radius: var(--apple-radius);
  transition: var(--apple-transition);
  padding: 0.5rem 1rem;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

.btn-sm {
  padding: 0.375rem 0.75rem;
  font-size: 0.85rem;
}

.btn-primary {
  background: var(--apple-blue);
  border: none;
  color: white;
}

.btn-primary:hover {
  background: #0066D6;
}

.btn-primary:active {
  background: #0055B3;
}

.btn-outline-primary {
  color: var(--apple-blue);
  border: 1px solid var(--apple-blue);
  background: transparent;
}

.btn-outline-primary:hover {
  background: var(--apple-blue);
  color: white;
}

.btn-outline-primary:active {
  background: #0055B3;
  color: white;
}

.btn-danger {
  background: var(--apple-red);
  border: none;
}

.btn-danger:hover {
  background: #E5352B;
}

.btn-danger:active {
  background: #CC2A22;
}

.btn-secondary {
  background: var(--apple-gray-5);
  color: var(--apple-text);
  border: none;
}

.btn-secondary:hover {
  background: var(--apple-gray-4);
}

.btn-secondary:active {
  background: var(--apple-gray-3);
}

.btn-outline-secondary {
  color: var(--apple-text-secondary);
  border: 1px solid var(--apple-gray-4);
  background: transparent;
}

.btn-outline-secondary:hover {
  background: var(--apple-gray-5);
  color: var(--apple-text);
}

.form-control, .form-select {
  border-radius: var(--apple-radius);
  border: 1px solid var(--apple-border);
  padding: 0.75rem 1rem;
  font-size: 1rem;
  transition: var(--apple-transition);
  background: var(--apple-bg);
  -webkit-appearance: none;
  appearance: none;
}

.form-control:focus, .form-select:focus {
  border-color: var(--apple-blue);
  box-shadow: 0 0 0 4px rgba(0, 122, 255, 0.15);
  outline: none;
}

.form-control::placeholder {
  color: var(--apple-gray-2);
}

.form-label {
  font-weight: 500;
  color: var(--apple-text);
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
}

.form-check-input {
  width: 1.25rem;
  height: 1.25rem;
  border-radius: 50%;
  margin-top: 0;
}

.form-check-input:checked {
  background-color: var(--apple-blue);
  border-color: var(--apple-blue);
}

.form-check-label {
  color: var(--apple-text);
  cursor: pointer;
}

.form-text {
  font-size: 0.8rem;
  color: var(--apple-text-secondary);
}

.modal-content {
  border-radius: var(--apple-radius-lg);
  border: none;
  box-shadow: var(--apple-shadow-lg);
  background: var(--apple-bg);
}

.modal-header {
  border-bottom: 1px solid var(--apple-border);
  padding: 1.25rem 1.5rem;
}

.modal-title {
  font-weight: 600;
  font-size: 1.125rem;
  letter-spacing: -0.02em;
}

.modal-body {
  padding: 1.5rem;
}

.modal-footer {
  border-top: 1px solid var(--apple-border);
  padding: 1rem 1.5rem;
}

.btn-close {
  opacity: 0.5;
  transition: var(--apple-transition);
  padding: 0.5rem;
}

.btn-close:hover {
  opacity: 1;
}

.table {
  margin-bottom: 0;
}

.alert {
  border-radius: var(--apple-radius);
  border: none;
  padding: 1rem 1.25rem;
  font-size: 0.9rem;
}

.alert-info {
  background: rgba(0, 122, 255, 0.1);
  color: var(--apple-blue);
}

.alert-success {
  background: rgba(52, 199, 89, 0.1);
  color: var(--apple-green);
}

.alert-danger {
  background: rgba(255, 59, 48, 0.1);
  color: var(--apple-red);
}

.alert-warning {
  background: rgba(255, 149, 0, 0.1);
  color: var(--apple-orange);
}

.nav-tabs {
  border-bottom: 1px solid var(--apple-border);
  gap: 0;
  flex-wrap: nowrap;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.nav-tabs::-webkit-scrollbar {
  display: none;
}

.nav-tabs .nav-link {
  border: none;
  color: var(--apple-text-secondary);
  padding: 0.75rem 1rem;
  font-weight: 500;
  font-size: 0.9rem;
  letter-spacing: -0.01em;
  position: relative;
  transition: var(--apple-transition);
  white-space: nowrap;
  flex-shrink: 0;
}

.nav-tabs .nav-link:hover {
  color: var(--apple-text);
}

.nav-tabs .nav-link.active {
  color: var(--apple-blue);
  background: transparent;
}

.nav-tabs .nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--apple-blue);
  border-radius: 2px 2px 0 0;
}

.badge {
  font-weight: 500;
  letter-spacing: 0.02em;
  padding: 0.35rem 0.65rem;
  border-radius: 8px;
}

.dropdown-menu {
  z-index: 1050;
  border-radius: var(--apple-radius);
  border: 1px solid var(--apple-border);
  box-shadow: var(--apple-shadow-lg);
  padding: 0.5rem 0;
}

.dropdown-item {
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
  transition: var(--apple-transition);
}

.dropdown-item:hover {
  background: var(--apple-gray-6);
}

.dropdown-item.text-danger {
  color: var(--apple-red);
}

.dropdown-item.text-danger:hover {
  background: rgba(255, 59, 48, 0.1);
}

h1, h2, h3, h4, h5, h6 {
  letter-spacing: -0.02em;
}

.text-muted {
  color: var(--apple-text-secondary) !important;
}

.input-group {
  display: flex;
  flex-wrap: nowrap;
}

.input-group .form-control {
  border-radius: var(--apple-radius) 0 0 var(--apple-radius);
  flex: 1;
  min-width: 0;
}

.input-group .btn {
  border-radius: 0 var(--apple-radius) var(--apple-radius) 0;
  border: 1px solid var(--apple-border);
  border-left: none;
  white-space: nowrap;
}

.input-group .btn-outline-primary {
  border: 1px solid var(--apple-blue);
  border-left: none;
}

.share-item {
  background: var(--apple-gray-6);
  border-radius: var(--apple-radius);
  padding: 1rem 1.25rem;
  margin-bottom: 0.75rem;
  transition: var(--apple-transition);
}

.share-item:hover {
  background: var(--apple-gray-5);
}

.share-item:last-child {
  margin-bottom: 0;
}

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

.fade-in {
  animation: fadeIn 0.3s ease-out;
}

.container {
  width: 100%;
  padding-left: 1rem;
  padding-right: 1rem;
  margin-left: auto;
  margin-right: auto;
}

.row {
  margin-left: -0.5rem;
  margin-right: -0.5rem;
}

.row > * {
  padding-left: 0.5rem;
  padding-right: 0.5rem;
}

.d-flex {
  display: flex !important;
}

.flex-wrap {
  flex-wrap: wrap !important;
}

.gap-1 { gap: 0.25rem !important; }
.gap-2 { gap: 0.5rem !important; }
.gap-3 { gap: 0.75rem !important; }

.justify-content-between { justify-content: space-between !important; }
.justify-content-center { justify-content: center !important; }
.justify-content-end { justify-content: flex-end !important; }

.align-items-center { align-items: center !important; }

.text-center { text-align: center !important; }
.text-start { text-align: left !important; }
.text-end { text-align: right !important; }

.w-100 { width: 100% !important; }

.mb-0 { margin-bottom: 0 !important; }
.mb-1 { margin-bottom: 0.25rem !important; }
.mb-2 { margin-bottom: 0.5rem !important; }
.mb-3 { margin-bottom: 0.75rem !important; }
.mb-4 { margin-bottom: 1rem !important; }

.mt-2 { margin-top: 0.5rem !important; }
.mt-3 { margin-top: 0.75rem !important; }

.ms-2 { margin-left: 0.5rem !important; }
.me-1 { margin-right: 0.25rem !important; }
.me-2 { margin-right: 0.5rem !important; }

.p-0 { padding: 0 !important; }
.p-2 { padding: 0.5rem !important; }
.p-4 { padding: 1rem !important; }

.py-2 { padding-top: 0.5rem !important; padding-bottom: 0.5rem !important; }

.small { font-size: 0.875rem !important; }

.opacity-75 { opacity: 0.75 !important; }

.overflow-hidden { overflow: hidden !important; }
.overflow-x-auto { overflow-x: auto !important; }

/* 移动端响应式 - 320px 到 480px */
@media (max-width: 480px) {
  html {
    font-size: 14px;
  }
  
  body {
    padding-bottom: var(--safe-area-bottom);
  }
  
  .container {
    padding-left: 0.75rem;
    padding-right: 0.75rem;
  }
  
  .card {
    border-radius: var(--apple-radius);
    margin-bottom: 0.75rem;
  }
  
  .card-header {
    padding: 0.875rem 1rem;
    font-size: 0.95rem;
  }
  
  .card-body {
    padding: 1rem;
  }
  
  .btn {
    padding: 0.5rem 0.75rem;
    font-size: 0.9rem;
  }
  
  .btn-sm {
    padding: 0.35rem 0.6rem;
    font-size: 0.8rem;
  }
  
  .form-control, .form-select {
    padding: 0.65rem 0.875rem;
    font-size: 1rem;
  }
  
  .form-label {
    font-size: 0.85rem;
    margin-bottom: 0.35rem;
  }
  
  .modal-dialog {
    margin: 0.5rem;
  }
  
  .modal-header {
    padding: 1rem;
  }
  
  .modal-body {
    padding: 1rem;
  }
  
  .modal-footer {
    padding: 0.75rem 1rem;
    flex-wrap: wrap;
    gap: 0.5rem;
  }
  
  .modal-footer .btn {
    flex: 1;
    min-width: 100px;
  }
  
  .nav-tabs .nav-link {
    padding: 0.65rem 0.875rem;
    font-size: 0.85rem;
  }
  
  .node-item {
    padding: 0.75rem 1rem;
    margin-bottom: 0.4rem;
  }
  
  .node-name {
    font-size: 0.9rem;
  }
  
  .node-type {
    font-size: 0.6rem;
    padding: 0.15rem 0.35rem;
  }
  
  .alert {
    padding: 0.75rem 1rem;
    font-size: 0.85rem;
  }
  
  .share-item {
    padding: 0.75rem 1rem;
    margin-bottom: 0.5rem;
  }
  
  .badge {
    padding: 0.25rem 0.5rem;
    font-size: 0.7rem;
  }
  
  .input-group .form-control {
    font-size: 0.9rem;
  }
  
  .input-group .btn {
    padding: 0.5rem 0.6rem;
  }
  
  h1 { font-size: 1.5rem !important; }
  h2 { font-size: 1.25rem !important; }
  h3 { font-size: 1.1rem !important; }
  h4 { font-size: 1rem !important; }
  h5 { font-size: 0.95rem !important; }
  h6 { font-size: 0.9rem !important; }
}

/* 平板响应式 - 481px 到 768px */
@media (min-width: 481px) and (max-width: 768px) {
  .container {
    max-width: 100%;
    padding-left: 1.25rem;
    padding-right: 1.25rem;
  }
  
  .card {
    border-radius: var(--apple-radius);
  }
  
  .card-header {
    padding: 1rem 1.25rem;
  }
  
  .card-body {
    padding: 1.25rem;
  }
  
  .btn {
    padding: 0.5rem 0.875rem;
  }
}

/* 桌面端响应式 - 769px 以上 */
@media (min-width: 769px) {
  .container {
    max-width: 720px;
  }
}

@media (min-width: 992px) {
  .container {
    max-width: 960px;
  }
}

@media (min-width: 1200px) {
  .container {
    max-width: 1140px;
  }
}

/* 触摸设备优化 */
@media (hover: none) and (pointer: coarse) {
  .btn {
    min-height: 44px;
    min-width: 44px;
  }
  
  .btn-sm {
    min-height: 36px;
    min-width: 36px;
  }
  
  .form-control, .form-select {
    min-height: 44px;
  }
  
  .nav-tabs .nav-link {
    min-height: 44px;
  }
  
  .node-item {
    min-height: 44px;
  }
  
  .card:hover {
    transform: none;
    box-shadow: var(--apple-shadow);
  }
  
  .subscription-card:hover {
    transform: none;
  }
  
  .btn:hover {
    transform: none;
  }
}

/* 横屏模式优化 */
@media (max-height: 500px) and (orientation: landscape) {
  .modal-dialog {
    margin: 0.5rem auto;
    max-height: 90vh;
  }
  
  .modal-body {
    max-height: 50vh;
    overflow-y: auto;
  }
}

/* 深色模式支持 */
@media (prefers-color-scheme: dark) {
  :root {
    --apple-bg: #1C1C1E;
    --apple-text: #F5F5F7;
    --apple-text-secondary: #98989D;
    --apple-gray-5: #3A3A3C;
    --apple-gray-6: #2C2C2E;
    --apple-border: rgba(255, 255, 255, 0.1);
    --apple-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    --apple-shadow-lg: 0 4px 20px rgba(0, 0, 0, 0.4);
  }
}

/* 打印样式 */
@media print {
  body {
    background: white;
    color: black;
  }
  
  .card {
    box-shadow: none;
    border: 1px solid #ddd;
  }
  
  .btn {
    display: none;
  }
  
  .nav-tabs {
    display: none;
  }
}

/* 无障碍支持 */
@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
}

/* 高对比度模式 */
@media (prefers-contrast: high) {
  :root {
    --apple-border: rgba(0, 0, 0, 0.3);
  }
  
  .btn {
    border: 2px solid currentColor;
  }
  
  .form-control, .form-select {
    border-width: 2px;
  }
}

/* 焦点可见性 */
:focus-visible {
  outline: 2px solid var(--apple-blue);
  outline-offset: 2px;
}

/* 选择文本样式 */
::selection {
  background: rgba(0, 122, 255, 0.3);
  color: var(--apple-text);
}

/* 滚动条样式 */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--apple-gray-3);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--apple-gray-2);
}