/*
  LearnNotes Portal - 认证 & 仪表盘样式
  独立于个人网站的样式系统，深色主题延续
  包含：登录/注册卡片、表单、仪表盘导航、工具卡片网格
*/

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans SC", sans-serif;
  background: #0d1117;
  color: #c9d1d9;
  line-height: 1.6;
  min-height: 100vh;
}

a { color: #58a6ff; text-decoration: none; }
a:hover { color: #79b8ff; }
.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }

/* ===== Auth Pages（登录/注册页面） ===== */
.auth-page {
  display: flex; align-items: center; justify-content: center;
  min-height: 100vh;
  background: linear-gradient(135deg, #0d1117 0%, #161b22 100%);
  padding: 24px;
}
.auth-container { width: 100%; max-width: 420px; }
.auth-card {
  background: #161b22;
  border: 1px solid #21262d;
  border-radius: 14px;
  padding: 40px 36px;
}
.auth-logo { font-size: 1rem; font-weight: 700; color: #c9d1d9 !important; display: inline-block; margin-bottom: 24px; }
.auth-logo span { color: #58a6ff; }
.auth-header h1 { font-size: 1.5rem; color: #f0f6fc; margin-bottom: 4px; }
.auth-header p { font-size: 0.9rem; color: #8b949e; margin-bottom: 28px; }

/* 表单控件：深色输入框 */
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 0.85rem; color: #c9d1d9; margin-bottom: 6px; font-weight: 500; }
.form-group input {
  width: 100%; padding: 10px 14px;
  background: #0d1117; border: 1px solid #30363d; border-radius: 8px;
  color: #c9d1d9; font-size: 0.95rem;
  transition: border-color 0.2s;
  outline: none;
}
.form-group input:focus { border-color: #58a6ff; box-shadow: 0 0 0 2px rgba(88, 166, 255, 0.15); }
.form-group input::placeholder { color: #484f58; }

/* 错误提示：红色背景框 */
.form-error {
  background: rgba(248, 81, 73, 0.1);
  border: 1px solid rgba(248, 81, 73, 0.3);
  color: #f85149;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 0.85rem;
  margin-bottom: 16px;
}

/* 提交按钮：绿色主色调 */
.auth-btn {
  width: 100%; padding: 11px 0;
  background: #238636; color: #fff;
  border: none; border-radius: 8px;
  font-size: 1rem; font-weight: 600;
  cursor: pointer; transition: background 0.2s;
  display: flex; align-items: center; justify-content: center; gap: 8px;
}
.auth-btn:hover { background: #2ea043; }
.auth-btn:disabled { opacity: 0.6; cursor: not-allowed; }

/* 加载动画：旋转圆圈 */
.spinner {
  width: 18px; height: 18px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.auth-footer { text-align: center; margin-top: 20px; font-size: 0.88rem; color: #8b949e; }

/* ===== Dashboard（仪表盘） ===== */
.dash-nav {
  background: rgba(13, 17, 23, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid #21262d;
  position: sticky; top: 0; z-index: 100;
}
.dash-nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 56px;
}
.dash-nav-left { display: flex; align-items: center; gap: 16px; }
.dash-logo { font-weight: 700; color: #c9d1d9 !important; }
.dash-logo span { color: #58a6ff; }
.dash-brand { font-size: 0.82rem; color: #6e7681; padding-left: 16px; border-left: 1px solid #21262d; }
.dash-nav-right { display: flex; align-items: center; gap: 16px; }
.dash-user { font-size: 0.85rem; color: #8b949e; }
.dash-link { font-size: 0.85rem; color: #8b949e; }
.dash-link:hover { color: #58a6ff; }
.dash-logout {
  background: transparent; border: 1px solid #30363d; color: #8b949e;
  padding: 6px 16px; border-radius: 6px; cursor: pointer; font-size: 0.82rem; transition: all 0.2s;
}
.dash-logout:hover { border-color: #f85149; color: #f85149; }  /* 退出按钮 hover 变红 */

.dash-main { padding: 48px 0 80px; min-height: calc(100vh - 56px - 56px); }
.dash-header { margin-bottom: 36px; }
.dash-header h1 { font-size: 1.6rem; color: #f0f6fc; }
.dash-header p { color: #8b949e; font-size: 0.95rem; margin-top: 4px; }

/* 工具卡片网格：自适应列数 */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.tool-card {
  background: #161b22;
  border: 1px solid #21262d;
  border-radius: 12px;
  padding: 28px;
  transition: all 0.25s;
  cursor: pointer;
}
.tool-card:hover {
  border-color: #30363d;
  background: #1c2128;
  transform: translateY(-3px);
}
.tool-card.disabled { opacity: 0.4; cursor: not-allowed; }           /* 未上线工具灰色 */
.tool-card.disabled:hover { transform: none; border-color: #21262d; background: #161b22; }
.tool-icon { font-size: 2.2rem; margin-bottom: 14px; }
.tool-card h3 { font-size: 1.1rem; color: #f0f6fc; margin-bottom: 8px; }
.tool-card p { font-size: 0.85rem; color: #8b949e; line-height: 1.5; margin-bottom: 16px; }
.tool-meta { display: flex; justify-content: space-between; align-items: center; }
.tool-status { font-size: 0.78rem; }
.tool-status.online { color: #3fb950; }      /* 绿色 - 可用 */
.tool-status.offline { color: #6e7681; }     /* 灰色 - 维护 */
.tool-status.coming { color: #d29922; }       /* 黄色 - 即将上线 */
.tool-link { font-size: 0.82rem; color: #58a6ff; font-weight: 500; }

/* 加载 & 空状态 */
.loading-state, .empty-state {
  text-align: center; padding: 60px 20px; color: #8b949e; grid-column: 1 / -1;
}
.loading-state .spinner-large {
  width: 32px; height: 32px;
  border: 3px solid rgba(88, 166, 255, 0.15);
  border-top-color: #58a6ff;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  margin: 0 auto 16px;
}

.dash-footer {
  text-align: center; padding: 18px 0;
  border-top: 1px solid #21262d;
  background: #0d1117;
}
.dash-footer p { color: #6e7681; font-size: 0.8rem; }

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .auth-card { padding: 28px 24px; }
  .tool-grid { grid-template-columns: 1fr; }
  .dash-nav-right .dash-link { display: none; }
  .dash-brand { display: none; }
}