/**
 * ============================================
 * 学生管理模块专用组件样式
 * ============================================
 * 
 * 复制自 special-education 标杆
 * 
 * @author 廖斌
 * @version 1.0.0
 * @date 2026-03-18
 */

/* ==================== 导航卡片 ==================== */
.nav-card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
  margin-top: var(--spacing-2xl);
}

.nav-card {
  background: var(--bg-glass);
  backdrop-filter: blur(var(--blur-md));
  border: var(--border-width-thin) solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  transition: var(--transition-base);
  cursor: pointer;
  text-decoration: none;
  color: inherit;
  display: block;
}

.nav-card:hover {
  background: var(--bg-glass-light);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-glow-primary);
  transform: translateY(-4px);
}

.nav-card-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--spacing-md);
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-3xl);
}

.nav-card-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-sm);
  text-align: center;
}

.nav-card-desc {
  color: var(--text-secondary);
  text-align: center;
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
}

/* ==================== 页面底栏（所有页面统一居中）==================== */
.page-footer {
  margin-top: var(--spacing-2xl);
  padding: var(--spacing-xl) 0;
  text-align: center;
  width: 100%;
  color: var(--text-secondary, #b4b9d1);
  font-size: var(--font-size-sm);
}

.page-footer p {
  margin: 0;
  text-align: center;
}

/* ==================== 美化下拉框样式 ==================== */
.form-select,
select {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  background-image: url('data:image/svg+xml;charset=UTF-8,<svg xmlns="http://www.w3.org/2000/svg" width="12" height="8" viewBox="0 0 12 8"><path fill="%2300d4ff" d="M6 8L0 0h12z"/></svg>');
  background-repeat: no-repeat;
  background-position: right 20px center;
  background-size: 12px;
  padding: 14px 52px 14px 20px !important;
  min-width: 200px;
  min-height: 50px;
  font-size: var(--font-size-base);
  font-weight: 500;
  line-height: 1.8;
  white-space: nowrap;
  overflow: visible;
  text-overflow: ellipsis;
  display: inline-flex;
  align-items: center;
}

.form-select:hover,
select:hover {
  border-color: var(--color-primary);
  background-color: var(--bg-input-focus);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(var(--color-primary-rgb), 0.15);
}

/* 工具栏间距优化 */
.toolbar-right { gap: var(--spacing-xl) !important; }
.toolbar { gap: var(--spacing-xl) !important; }

/* ==================== 表单元素样式 ==================== */

input[type="text"],
input[type="number"],
input[type="email"],
input[type="password"],
textarea,
select {
  width: 100%;
  padding: var(--spacing-md);
  background: var(--bg-input);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: var(--font-size-base);
  transition: all 0.3s ease;
  outline: none;
}

input[type="text"]:focus,
input[type="number"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
textarea:focus,
select:focus {
  border-color: var(--color-primary);
  background: var(--bg-input-focus);
  box-shadow: 0 0 0 3px rgba(var(--color-primary-rgb), 0.1);
}

input::placeholder,
textarea::placeholder { color: var(--text-tertiary); }

textarea {
  min-height: 120px;
  resize: vertical;
  line-height: var(--line-height-relaxed);
}

.form-group { margin-bottom: var(--spacing-lg); }

.form-label {
  display: block;
  margin-bottom: var(--spacing-sm);
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 14px 16px;
  background: var(--bg-input);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: var(--font-size-base);
  line-height: 1.6;
  transition: all 0.3s ease;
}

.form-input {
  min-height: 50px !important;
  height: auto !important;
  line-height: 1.8 !important;
  padding: 14px 16px !important;
  overflow: visible !important;
}

.form-select {
  min-height: 50px !important;
  line-height: 1.8 !important;
  padding: 14px 16px !important;
}

.form-textarea {
  min-height: 120px !important;
  line-height: 1.8 !important;
  padding: 14px 16px !important;
  resize: vertical;
  overflow-y: auto !important;
}

/* 按钮样式 */
.btn,
button.btn {
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--gradient-primary);
  border: none;
  border-radius: var(--radius-md);
  color: var(--text-inverse);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  text-decoration: none;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow-primary);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn-secondary {
  background: var(--bg-secondary);
  border: 2px solid var(--border-color);
  color: var(--text-primary);
}

.btn-secondary:hover {
  border-color: var(--color-primary);
  background: var(--bg-glass-light);
}

/* ==================== 响应式适配 ==================== */
@media (max-width: 768px) {
  .nav-card-grid { grid-template-columns: 1fr; }
}