/* 古冶职教中心 AI智慧教学系统 全局样式 */

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

:root {
  --primary: #185FA5;
  --primary-light: #E6F1FB;
  --primary-dark: #0C447C;
  --teal: #0F6E56;
  --teal-light: #E1F5EE;
  --purple: #534AB7;
  --purple-light: #EEEDFE;
  --coral: #993C1D;
  --coral-light: #FAECE7;
  --amber: #854F0B;
  --amber-light: #FAEEDA;
  --text: #2C2C2A;
  --text-muted: #5F5E5A;
  --text-light: #888780;
  --bg: #F8F7F4;
  --bg-white: #FFFFFF;
  --border: #D3D1C7;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 1px 3px rgba(0,0,0,0.08);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.6;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ===== 布局 ===== */
.app-header {
  background: var(--bg-white);
  border-bottom: 1px solid var(--border);
  padding: 10px 20px;
  display: flex; align-items: center; justify-content: space-between;
  position: sticky; top: 0; z-index: 100;
}
.app-header .logo { font-size: 18px; font-weight: 600; color: var(--primary); }
.app-header .logo span { font-size: 13px; color: var(--text-muted); font-weight: 400; margin-left: 8px; }
.app-header .user-info { display: flex; align-items: center; gap: 12px; font-size: 13px; }
.app-header .user-info .role-badge {
  padding: 2px 10px; border-radius: 12px; font-size: 11px; font-weight: 500;
  background: var(--primary-light); color: var(--primary);
}
.app-header .user-info .role-badge.admin { background: var(--purple-light); color: var(--purple); }
.app-header .user-info .role-badge.student { background: var(--teal-light); color: var(--teal); }

.container { max-width: 1200px; margin: 0 auto; padding: 20px; }

/* ===== 卡片 ===== */
.card {
  background: var(--bg-white); border-radius: var(--radius);
  border: 1px solid var(--border); padding: 20px; margin-bottom: 16px;
  box-shadow: var(--shadow);
}
.card-title { font-size: 16px; font-weight: 600; margin-bottom: 12px; color: var(--text); }
.card-subtitle { font-size: 13px; color: var(--text-muted); margin-bottom: 12px; }

/* ===== 按钮 ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 8px 18px; border-radius: var(--radius-sm); font-size: 14px;
  font-weight: 500; cursor: pointer; border: 1px solid transparent;
  transition: all 0.15s; text-decoration: none; font-family: inherit;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--primary); color: white; border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-dark); }
.btn-teal { background: var(--teal); color: white; }
.btn-teal:hover { opacity: 0.9; }
.btn-purple { background: var(--purple); color: white; }
.btn-purple:hover { opacity: 0.9; }
.btn-outline { background: white; color: var(--primary); border-color: var(--primary); }
.btn-outline:hover { background: var(--primary-light); }
.btn-sm { padding: 5px 12px; font-size: 13px; }
.btn-lg { padding: 12px 28px; font-size: 16px; }
.btn-danger { background: #E24B4A; color: white; }
.btn-danger:hover { opacity: 0.9; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* ===== 表单 ===== */
.form-group { margin-bottom: 14px; }
.form-group label { display: block; font-size: 13px; font-weight: 500; margin-bottom: 4px; color: var(--text-muted); }
.form-input, .form-select, .form-textarea {
  width: 100%; padding: 9px 12px; border: 1px solid var(--border); border-radius: var(--radius-sm);
  font-size: 14px; font-family: inherit; background: white; transition: border-color 0.15s;
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none; border-color: var(--primary); box-shadow: 0 0 0 2px var(--primary-light);
}
.form-textarea { min-height: 80px; resize: vertical; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

/* ===== 导航 ===== */
.nav-tabs {
  display: flex; gap: 0; border-bottom: 2px solid var(--border); margin-bottom: 16px;
}
.nav-tab {
  padding: 10px 20px; font-size: 14px; cursor: pointer; border: none; background: none;
  color: var(--text-muted); border-bottom: 2px solid transparent; margin-bottom: -2px;
  transition: all 0.15s; font-family: inherit;
}
.nav-tab:hover { color: var(--text); }
.nav-tab.active { color: var(--primary); border-bottom-color: var(--primary); font-weight: 500; }

/* ===== 进度/徽章 ===== */
.badge {
  display: inline-block; padding: 2px 10px; border-radius: 12px;
  font-size: 12px; font-weight: 500;
}
.badge-blue { background: var(--primary-light); color: var(--primary); }
.badge-teal { background: var(--teal-light); color: var(--teal); }
.badge-purple { background: var(--purple-light); color: var(--purple); }
.badge-coral { background: var(--coral-light); color: var(--coral); }
.badge-amber { background: var(--amber-light); color: var(--amber); }

/* ===== 表格 ===== */
.data-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.data-table th, .data-table td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); }
.data-table th { background: #FAFAF7; font-weight: 600; color: var(--text-muted); font-size: 12px; }
.data-table tr:hover td { background: #FAFAF7; }

/* ===== 对话气泡 ===== */
.chat-area { max-height: 500px; overflow-y: auto; padding: 10px; }
.chat-msg { margin-bottom: 14px; display: flex; gap: 10px; }
.chat-msg.user { flex-direction: row-reverse; }
.chat-bubble {
  max-width: 80%; padding: 10px 14px; border-radius: 12px; font-size: 14px;
  line-height: 1.6; white-space: pre-wrap; word-break: break-word;
}
.chat-msg.assistant .chat-bubble { background: var(--primary-light); border-bottom-left-radius: 4px; }
.chat-msg.user .chat-bubble { background: var(--teal-light); border-bottom-right-radius: 4px; }
.chat-avatar {
  width: 36px; height: 36px; border-radius: 50%; display: flex;
  align-items: center; justify-content: center; font-size: 16px; flex-shrink: 0;
}
.chat-avatar.ai { background: var(--primary-light); color: var(--primary); }
.chat-avatar.user { background: var(--teal-light); color: var(--teal); }

.chat-input-row { display: flex; gap: 10px; padding-top: 12px; border-top: 1px solid var(--border); }
.chat-input-row .form-input { flex: 1; }

/* ===== 网格 ===== */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }
.grid-4 { display: grid; grid-template-columns: 1fr 1fr 1fr 1fr; gap: 16px; }

/* ===== 状态卡片 ===== */
.stat-card {
  background: var(--bg-white); border-radius: var(--radius); padding: 18px;
  border: 1px solid var(--border); text-align: center;
}
.stat-card .stat-value { font-size: 28px; font-weight: 600; color: var(--primary); }
.stat-card .stat-label { font-size: 12px; color: var(--text-muted); margin-top: 4px; }

/* ===== 加载动画 ===== */
.loading {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  padding: 20px; color: var(--text-muted); font-size: 13px;
}
.spinner {
  width: 20px; height: 20px; border: 2px solid var(--primary-light);
  border-top-color: var(--primary); border-radius: 50%;
  animation: spin 0.6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== 消息提示 ===== */
.toast {
  position: fixed; top: 20px; right: 20px; z-index: 9999;
  padding: 12px 20px; border-radius: var(--radius-sm); font-size: 14px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15); animation: slideIn 0.3s;
  max-width: 360px;
}
.toast.success { background: #EAF3DE; color: #27500A; border: 1px solid #97C459; }
.toast.error { background: #FCEBEB; color: #791F1F; border: 1px solid #F09595; }
.toast.info { background: var(--primary-light); color: var(--primary-dark); border: 1px solid #85B7EB; }
@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* ===== 登录页 ===== */
.login-page {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--primary-light) 0%, var(--purple-light) 100%);
}
.login-card {
  background: white; border-radius: 16px; padding: 40px; width: 380px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.1);
}
.login-card h1 { font-size: 24px; text-align: center; margin-bottom: 4px; }
.login-card .subtitle { text-align: center; color: var(--text-muted); font-size: 13px; margin-bottom: 28px; }
.login-card .btn { width: 100%; padding: 11px; margin-top: 8px; }

/* ===== 大屏授课端特有 ===== */
.teach-layout { display: grid; grid-template-columns: 280px 1fr 300px; gap: 16px; min-height: calc(100vh - 60px); }
.teach-sidebar { background: var(--bg-white); border-radius: var(--radius); border: 1px solid var(--border); padding: 16px; }
.teach-main { background: var(--bg-white); border-radius: var(--radius); border: 1px solid var(--border); display: flex; flex-direction: column; }
.teach-main .lecture-content { flex: 1; overflow-y: auto; padding: 24px; font-size: 18px; line-height: 2; }
.teach-panel { background: var(--bg-white); border-radius: var(--radius); border: 1px solid var(--border); padding: 16px; }
.teach-panel h3 { font-size: 15px; margin-bottom: 12px; padding-bottom: 8px; border-bottom: 1px solid var(--border); }

/* ===== 响应式 ===== */
@media (max-width: 900px) {
  .teach-layout { grid-template-columns: 1fr; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: 1fr 1fr; }
  .form-row { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  body { font-size: 14px; overflow-x: hidden; }
  .container { padding: 8px; }
  .card { padding: 12px; }
  .top-toolbar { padding: 4px 6px; gap: 3px; flex-wrap: wrap; }
  .top-toolbar .tool-btn { padding: 5px 10px; font-size: 11px; }
  .header { padding: 8px 12px; flex-direction: column; gap: 6px; align-items: flex-start; }
  .header h1 { font-size: 16px; }
  .header .user-bar { font-size: 12px; gap: 4px; flex-wrap: wrap; }
  .header .user-bar button { padding: 4px 10px; font-size: 11px; }
  .header .user-bar a { font-size: 12px; }
  input, select, textarea { font-size: 16px; max-width: 100%; }
  .btn { padding: 8px 14px; font-size: 13px; }
  .form-input { padding: 10px 12px; font-size: 16px; }
  .grid-4 { grid-template-columns: 1fr; }
  .login-card { width: 95%; max-width: 100%; padding: 20px 16px; }
  .app-header { padding: 6px 10px; }
  .app-header .logo { font-size: 14px; }
  table { font-size: 12px; }
  th, td { padding: 6px 8px; }
}

@media (max-width: 600px) {
  .container { padding: 6px; }
  .card { padding: 10px; }
  .login-card { width: 96%; padding: 18px 14px; }
  .app-header { padding: 6px 10px; }
  .app-header .logo { font-size: 14px; }
  .app-header .logo span { display: none; }
}