/* 完全响应式设计样式 */

/* 全局重置和基础样式 */
* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
}

/* 在小屏幕上适当减小字体 */
@media (max-width: 768px) {
  html {
    font-size: 14px;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 12px;
  }
}

/* 主容器样式 */
.app-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  width: 100%;
  overflow-x: hidden;
}

/* 顶部导航栏样式 - 完全响应式 */
.top-nav {
  width: 100%;
  height: var(--header-height, 60px);
  display: flex;
  align-items: center;
  padding: 0.5rem 1rem;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
  z-index: 1000;
  position: sticky;
  top: 0;
  background-color: var(--primary-color);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  height: 100%;
}

.nav-brand {
  display: flex;
  align-items: center;
}

.nav-brand-text {
  color: white;
  font-size: 1.25rem;
  font-weight: bold;
  text-decoration: none;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  flex: 1;
  justify-content: center;
  margin: 0 1rem;
}

.nav-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 0.5rem;
  margin: 0 0.125rem;
  background: transparent;
  border: none;
  color: rgba(255, 255, 255, 0.7);
  border-radius: 0.375rem;
  cursor: pointer;
  transition: all 0.3s ease;
  min-width: 4.5rem;
  font-size: 0.75rem;
  min-height: 3.5rem;
}

.nav-btn i {
  font-size: 1.25rem;
  margin-bottom: 0.25rem;
}

.nav-btn:hover {
  background-color: rgba(255, 255, 255, 0.1);
  color: white;
}

.nav-btn-active {
  background-color: rgba(255, 255, 255, 0.2) !important;
  color: white !important;
}

.nav-user {
  display: flex;
  align-items: center;
}

.user-dropdown {
  position: relative;
}

.user-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem;
  background: transparent;
  border: none;
  color: white;
  border-radius: 0.375rem;
  cursor: pointer;
  transition: background-color 0.3s;
  font-size: 0.875rem;
}

.user-btn:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

.dropdown-content {
  display: none;
  position: absolute;
  right: 0;
  top: 100%;
  background-color: white;
  min-width: 12rem;
  box-shadow: 0 0.5rem 1rem rgba(0,0,0,0.1);
  border-radius: 0.5rem;
  overflow: hidden;
  z-index: 1001;
  margin-top: 0.25rem;
}

.user-dropdown:hover .dropdown-content {
  display: block;
}

.dropdown-content a {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  text-decoration: none;
  color: #333;
  transition: background-color 0.3s;
  font-size: 0.875rem;
}

.dropdown-content a:hover {
  background-color: #f8f9fa;
}

/* 主内容区域样式 */
.main-content-wrapper {
  flex: 1;
  display: flex;
  flex-direction: column;
  width: 100%;
  padding-top: 0.5rem;
}

.content-container {
  flex: 1;
  display: flex;
  width: 100%;
  max-width: 100%;
  margin: 0 auto;
  padding: 0 0.5rem;
}

.main-area {
  flex: 1;
  width: 100%;
  padding: 1rem 0.5rem;
}

.content-area {
  width: 100%;
}

/* 表单控件响应式样式 */
.form-control {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border: 1px solid #dee2e6;
  border-radius: 0.5rem;
  font-size: 1rem;
  line-height: 1.5;
  transition: border-color 0.3s, box-shadow 0.3s;
}

.form-control:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
  outline: 0;
}

/* 按钮响应式样式 */
.btn {
  display: inline-block;
  font-weight: 500;
  text-align: center;
  vertical-align: middle;
  user-select: none;
  border: 1px solid transparent;
  padding: 0.5rem 1rem;
  font-size: 1rem;
  line-height: 1.5;
  border-radius: 0.5rem;
  transition: color 0.15s, background-color 0.15s, border-color 0.15s, box-shadow 0.15s;
  text-decoration: none;
  cursor: pointer;
  min-height: 2.5rem;
  min-width: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-block {
  width: 100%;
}

/* 卡片响应式样式 */
.card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-width: 0;
  word-wrap: break-word;
  background-color: #fff;
  background-clip: border-box;
  border: 1px solid rgba(0, 0, 0, 0.125);
  border-radius: 0.75rem;
  margin-bottom: 1rem;
  box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
}

.card-body {
  flex: 1 1 auto;
  padding: 1.25rem;
}

/* 表格响应式样式 */
.table-responsive {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.table {
  width: 100%;
  margin-bottom: 1rem;
  color: #212529;
}

.table th,
.table td {
  padding: 0.75rem;
  vertical-align: top;
  border-top: 1px solid #dee2e6;
}

.table thead th {
  vertical-align: bottom;
  border-bottom: 2px solid #dee2e6;
}

/* Grid 系统响应式 */
.row {
  display: flex;
  flex-wrap: wrap;
  margin-right: -0.5rem;
  margin-left: -0.5rem;
}

.col {
  flex: 1;
  padding-right: 0.5rem;
  padding-left: 0.5rem;
}

/* 移动端优先的断点设计 */
/* 超小屏幕 (手机, 0px及以上) */
@media (max-width: 575.98px) {
  .nav-brand-text {
    font-size: 1.1rem;
    max-width: 100px;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  
  .nav-menu {
    gap: 0.125rem;
    margin: 0 0.25rem;
  }
  
  .nav-btn {
    min-width: 3rem;
    padding: 0.25rem;
    min-height: 3rem;
    font-size: 0.65rem;
    flex-direction: row;
    gap: 0.25rem;
    justify-content: flex-start;
  }
  
  .nav-btn i {
    font-size: 1rem;
    margin-bottom: 0;
    margin-right: 0.25rem;
  }
  
  .nav-btn span {
    font-size: 0.6rem;
    white-space: nowrap;
  }
  
  .user-btn {
    padding: 0.25rem 0.5rem;
    gap: 0.25rem;
    font-size: 0.75rem;
  }
  
  .main-area {
    padding: 0.5rem 0.25rem;
  }
  
  .content-area {
    padding: 0 0.25rem;
  }
  
  .form-control {
    padding: 0.5rem;
    font-size: 0.9rem;
  }
  
  .btn {
    padding: 0.5rem;
    font-size: 0.9rem;
  }
  
  .card-body {
    padding: 1rem;
  }
  
  .table th,
  .table td {
    padding: 0.5rem;
    font-size: 0.8rem;
  }
  
  .row {
    margin-right: -0.25rem;
    margin-left: -0.25rem;
  }
  
  .col {
    padding-right: 0.25rem;
    padding-left: 0.25rem;
  }
}

/* 小屏幕 (手机, 576px及以上) */
@media (min-width: 576px) and (max-width: 767.98px) {
  .nav-menu {
    gap: 0.25rem;
  }
  
  .nav-btn {
    min-width: 3.5rem;
    font-size: 0.7rem;
    min-height: 3.25rem;
  }
  
  .nav-btn span {
    display: block;
  }
  
  .nav-btn i {
    margin-bottom: 0.25rem;
  }
  
  .main-area {
    padding: 0.75rem 0.5rem;
  }
}

/* 中等屏幕 (平板, 768px及以上) */
@media (min-width: 768px) and (max-width: 991.98px) {
  .nav-menu {
    gap: 0.5rem;
  }
  
  .nav-btn {
    min-width: 4rem;
    font-size: 0.75rem;
    min-height: 3.5rem;
  }
  
  .content-container {
    padding: 0 1rem;
  }
  
  .main-area {
    padding: 1rem 0.75rem;
  }
}

/* 大屏幕 (桌面, 992px及以上) */
@media (min-width: 992px) and (max-width: 1199.98px) {
  .nav-menu {
    gap: 0.75rem;
  }
  
  .nav-btn {
    min-width: 4.5rem;
    font-size: 0.8rem;
    min-height: 3.75rem;
  }
  
  .content-container {
    padding: 0 1.5rem;
  }
  
  .main-area {
    padding: 1rem 1rem;
  }
}

/* 超大屏幕 (大桌面, 1200px及以上) */
@media (min-width: 1200px) {
  .nav-menu {
    gap: 1rem;
  }
  
  .nav-btn {
    min-width: 5rem;
    font-size: 0.85rem;
    min-height: 4rem;
  }
  
  .content-container {
    max-width: 1600px;
    padding: 0 2rem;
  }
  
  .main-area {
    padding: 1.5rem 1.5rem;
  }
}

/* 触摸设备优化 */
@media (hover: none) and (pointer: coarse) {
  .nav-btn {
    min-height: 3.5rem;
  }
  
  .btn {
    min-height: 2.75rem;
  }
  
  .dropdown-content a {
    padding: 1rem 1.25rem;
  }
}

/* 高DPI屏幕优化 */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  .top-nav {
    box-shadow: 0 1px 2px rgba(0,0,0,0.1);
  }
  
  .card {
    box-shadow: 0 0.25rem 0.5rem rgba(0, 0, 0, 0.075);
  }
}

/* 横屏优化 */
@media (orientation: landscape) and (max-height: 500px) {
  .app-container {
    min-height: 100vh;
  }
  
  .top-nav {
    height: 3rem;
  }
  
  .nav-btn {
    min-height: 2.75rem;
    min-width: 3rem;
    font-size: 0.65rem;
    padding: 0.25rem;
  }
  
  .nav-btn {
    flex-direction: row;
    gap: 0.25rem;
    justify-content: flex-start;
  }
  
  .nav-btn i {
    margin-bottom: 0;
    margin-right: 0.25rem;
  }
  
  .nav-btn span {
    font-size: 0.6rem;
    white-space: nowrap;
  }
  
  .main-area {
    padding: 0.5rem;
  }
}

/* 可访问性增强 */
@media (prefers-reduced-motion: reduce) {
  .nav-btn,
  .btn,
  .user-btn {
    transition: none;
  }
}

/* 高对比度模式支持 */
@media (prefers-contrast: high) {
  .form-control {
    border-width: 2px;
  }
  
  .btn {
    border-width: 2px;
  }
  
  .card {
    border-width: 2px;
  }
}