/* ===== 重设计 波1：新导航 / 仪表盘 / 登录 ===== */
/* 设计令牌补充（spec §5） */
:root {
  --primary-light-2: #eff6ff;      /* 激活标签底 */
  --warning-bg: #fff7ed;
  --warning-text: #b45309;
}

/* ── 顶栏：白底新样式（覆盖 style.css 渐变蓝） ── */
.app-header {
  background: #ffffff;
  color: var(--text);
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.06);
  border-bottom: 1px solid var(--border);
}
.app-header h1 { color: var(--text); }
.header-brand { display: flex; align-items: center; gap: 8px; }
.brand-logo {
  width: 28px; height: 28px; border-radius: 8px;
  background: linear-gradient(135deg, #2563eb, #3b82f6);
  color: #fff; font-size: 0.78rem; font-weight: 700;
  display: inline-flex; align-items: center; justify-content: center;
  flex-shrink: 0; box-shadow: 0 2px 6px rgba(37, 99, 235, 0.35);
}
.header-tagline { color: var(--text-secondary); }

/* 主标签：胶囊样式（覆盖 .main-tab-link 白色系） */
.main-tab-link {
  color: var(--text-secondary);
  padding: 6px 18px;
}
.main-tab-link:hover { color: var(--primary); background: var(--bg-alt); }
.main-tab-link.active { color: var(--primary); background: var(--primary-light-2); font-weight: 600; }
.main-tab-link.active::after { display: none; }

/* 头部右侧按钮（覆盖 .header-actions button 半透明白） */
.header-actions { gap: 10px; }
.header-actions .header-ai-btn {
  background: var(--primary-light-2); color: var(--primary);
  border: none; padding: 7px 14px; border-radius: 8px;
  font-size: var(--text-xs); font-weight: 600; cursor: pointer;
  white-space: nowrap; transition: all .15s ease;
}
.header-actions .header-ai-btn:hover { background: #dbeafe; transform: translateY(-1px); }
.header-actions .header-login-btn {
  background: var(--primary); color: #fff; border: none;
  padding: 7px 18px; border-radius: 8px;
  font-size: var(--text-xs); font-weight: 600; text-decoration: none;
  transition: all .15s ease;
}
.header-actions .header-login-btn:hover { background: var(--primary-dark); }
.header-actions .header-register-btn {
  background: transparent; color: var(--primary); border: 1px solid var(--primary);
  padding: 6px 16px; border-radius: 8px;
  font-size: var(--text-xs); font-weight: 500; text-decoration: none;
  transition: all .15s ease;
}
.header-actions .header-icon-btn {
  background: transparent; color: var(--text);
}

/* 用户菜单（头像下拉） */
.header-actions .user-profile-btn {
  background: transparent; color: var(--text); border: 1px solid var(--border);
  border-radius: 100px; padding: 3px 12px 3px 3px;
}
.header-actions .user-profile-btn:hover { background: var(--bg-alt); transform: none; }
.header-actions .user-avatar {
  background: linear-gradient(135deg, #2563eb, #3b82f6);
  border: none; width: 26px; height: 26px; font-size: var(--text-xs);
}
.user-menu { position: relative; }
.user-dropdown {
  position: absolute; right: 0; top: calc(100% + 6px); z-index: 200;
  background: #fff; border: 1px solid var(--border); border-radius: 10px;
  box-shadow: var(--shadow-lg); min-width: 140px; padding: 4px; overflow: hidden;
}
.user-dropdown button {
  display: block; width: 100%; text-align: left;
  background: none; border: none; padding: 8px 12px;
  font-size: var(--text-sm); color: var(--text); cursor: pointer;
  border-radius: 6px;
}
.user-dropdown button:hover { background: var(--bg-alt); color: var(--primary); }

/* ── 移动端底部导航（桌面隐藏，≤860px 显示） ── */
.mobile-bottom-nav { display: none; }
@media (max-width: 860px) {
  .main-tabs { display: none !important; }
  .header-ai-btn { display: none !important; }
  .app-header { padding: 0 12px; }
  .user-name { display: none; }
  .mobile-bottom-nav {
    display: flex; position: fixed; left: 0; right: 0; bottom: 0; z-index: 100;
    background: #fff; border-top: 1px solid var(--border);
    padding-bottom: env(safe-area-inset-bottom);
  }
  .mobile-bottom-nav .mb-link {
    flex: 1; text-align: center; text-decoration: none; color: var(--text-secondary);
    padding: 7px 0 6px; font-size: 0.6rem; display: flex; flex-direction: column;
    align-items: center; gap: 2px;
  }
  .mobile-bottom-nav .mb-link .mb-icon { font-size: 1.15rem; line-height: 1; }
  .mobile-bottom-nav .mb-link.active { color: var(--primary); font-weight: 600; }
  body { padding-bottom: 58px; }
}

/* 顶栏防溢出：窗口 ≤1366 时中间导航收缩并可横向滚动，避免右侧按钮被顶出视口产生底侧滚动条 */
@media (max-width: 1366px) {
  .main-tabs {
    flex: 1 1 auto;
    min-width: 0;
    margin: 0;
    overflow-x: auto;
    justify-content: flex-start;
    scrollbar-width: none;
    -ms-overflow-style: none;
  }
  .main-tabs::-webkit-scrollbar { display: none; }
  .main-tab-link { padding: 6px 10px; }
}

/* ── 登录/注册页 ── */
.auth-wrap {
  min-height: calc(100vh - 56px);
  display: flex; align-items: flex-start; justify-content: center;
  background: linear-gradient(160deg, #eff6ff 0%, #f8fafc 100%);
  padding: 40px 16px;
}
.auth-card {
  width: 100%; max-width: 360px; background: #fff;
  border: 1px solid var(--border); border-radius: 16px;
  padding: 28px 26px 22px; box-shadow: 0 8px 30px rgba(37, 99, 235, 0.08);
}
.auth-logo { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 0.95rem; margin-bottom: 18px; }
.auth-title { font-size: 1.1rem; font-weight: 700; text-align: center; margin: 0 0 4px; }
.auth-sub { font-size: var(--text-xs); color: var(--text-secondary); text-align: center; margin: 0 0 16px; }
.auth-notice {
  background: #fff8e1; color: #8a6d3b; font-size: var(--text-xs);
  padding: 8px 12px; border-radius: 8px; margin-bottom: 12px;
}
.auth-label { display: block; font-size: var(--text-xs); color: var(--text-secondary); margin: 10px 0 5px; }
.auth-input {
  width: 100%; padding: 10px 12px; font-size: var(--text-sm);
  border: 1.5px solid var(--border); border-radius: 10px; outline: none;
  font-family: var(--font-ui); color: var(--text); background: #fff;
  transition: border-color .15s ease, box-shadow .15s ease;
}
.auth-input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12); }
.auth-error { color: var(--danger); font-size: var(--text-xs); margin: 8px 0; }
.auth-submit { width: 100%; margin-top: 16px; padding: 11px; font-size: var(--text-sm); border-radius: 10px; }
.auth-submit:disabled { opacity: .6; cursor: not-allowed; }
.auth-foot { display: flex; justify-content: space-between; margin-top: 16px; font-size: var(--text-xs); }
.auth-foot a { color: var(--primary); text-decoration: none; }
.auth-foot a.ghost { color: var(--text-secondary); }

/* ── 登录引导卡（操作级拦截） ── */
.gate-overlay { display: flex; align-items: center; justify-content: center; }
.login-gate-modal {
  background: #fff; border-radius: 16px; padding: 26px 24px 20px;
  max-width: 320px; width: 90%; text-align: center;
  box-shadow: var(--shadow-lg); border: 1px solid var(--border);
}
.login-gate-modal .gate-icon { font-size: 2.2rem; margin-bottom: 8px; }
.login-gate-modal h3 { font-size: 1rem; font-weight: 700; margin: 0 0 6px; }
.login-gate-modal p { font-size: var(--text-xs); color: var(--text-secondary); margin: 0 0 14px; }
.login-gate-modal .btn-block { display: block; width: 100%; margin-bottom: 8px; text-align: center; text-decoration: none; }
.login-gate-modal .gate-cancel {
  background: none; border: none; color: var(--text-light);
  font-size: var(--text-xs); cursor: pointer; padding: 6px;
}
.login-gate-modal .gate-cancel:hover { color: var(--text-secondary); }

/* ── 页面级登录引导（个人页访客） ── */
.login-required-card {
  max-width: 420px; margin: 60px auto; text-align: center;
  background: #fff; border: 1px solid var(--border); border-radius: 16px;
  padding: 40px 28px; box-shadow: var(--shadow);
}
.login-required-card .lr-icon { font-size: 2.6rem; margin-bottom: 10px; }
.login-required-card h2 { font-size: 1.15rem; margin: 0 0 6px; }
.login-required-card p { font-size: var(--text-sm); color: var(--text-secondary); margin: 0 0 18px; }
.login-required-card .lr-actions { display: flex; gap: 10px; justify-content: center; margin-bottom: 14px; }
.login-required-card .lr-actions a { text-decoration: none; }
.login-required-card .lr-browse { color: var(--text-light); font-size: var(--text-xs); text-decoration: none; }
.login-required-card .lr-browse:hover { color: var(--text-secondary); }

/* ── 首页仪表盘 ── */
.dash-hero {
  background: linear-gradient(120deg, #1e40af, #3b82f6); color: #fff;
  border-radius: 16px; padding: 26px 24px; margin-bottom: 16px;
}
.dash-hero h2 { font-size: 1.25rem; margin: 0 0 8px; }
.dash-hero p { font-size: var(--text-sm); opacity: .9; margin: 0 0 18px; max-width: 560px; }
.dash-hero .dash-cta { display: flex; gap: 10px; flex-wrap: wrap; }
.dash-hero .dash-cta a {
  background: #fff; color: var(--primary); font-weight: 600;
  border-radius: 8px; padding: 8px 18px; font-size: var(--text-sm);
  text-decoration: none; transition: transform .15s ease;
}
.dash-hero .dash-cta a:hover { transform: translateY(-1px); }
.dash-hero .dash-cta a.ghost { background: rgba(255,255,255,.15); color: #fff; }

.dash-greet { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 14px; }
.dash-greet h2 { font-size: 1.05rem; margin: 0; }
.dash-countdown {
  font-style: normal; font-size: var(--text-xs); font-weight: 500;
  color: var(--primary); background: var(--primary-light-2);
  padding: 4px 12px; border-radius: 999px;
}
.dash-countdown.urgent { color: var(--danger); background: var(--danger-light); }

.dash-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 14px; margin-bottom: 14px; }
.dash-card {
  background: var(--card-bg); border: 1px solid var(--border);
  border-radius: 12px; padding: 16px;
}
.dash-card h3 { font-size: var(--text-sm); font-weight: 700; margin: 0 0 10px; display: flex; justify-content: space-between; align-items: center; }
.dash-card h3 span { font-weight: 500; color: var(--text-secondary); font-size: var(--text-xs); }
.dash-progress { height: 6px; background: var(--bg-alt); border-radius: 999px; overflow: hidden; margin-bottom: 10px; }
.dash-progress i { display: block; height: 100%; background: var(--primary); border-radius: 999px; }
.dash-task { font-size: var(--text-xs); color: var(--text-secondary); padding: 4px 0; display: flex; align-items: center; gap: 6px; }
.dash-task.done { color: var(--success); }
.dash-overdue-toggle { justify-content: space-between; font-weight: 600; user-select: none; }
.dash-overdue-toggle:hover { text-decoration: underline; }
.dash-overdue-caret { font-size: 10px; margin-left: 4px; }
.dash-overdue-list { margin: 2px 0 6px; padding-left: 4px; border-left: 2px solid var(--danger); }
.dash-subtask { padding: 3px 0 3px 8px; }
.dash-subtask-dot { color: var(--danger); flex-shrink: 0; }
.dash-subtask-title { flex: 1; min-width: 0; }
.dash-subtask-due { color: var(--text-light); font-size: 11px; white-space: nowrap; margin-left: 8px; flex-shrink: 0; }
.dash-resume-box {
  background: var(--bg); border: 1px solid var(--border); border-radius: 10px;
  padding: 10px 12px; font-size: var(--text-sm); font-weight: 600; line-height: 1.7;
}
.dash-resume-box small { color: var(--text-secondary); font-weight: 400; }
.dash-chip {
  display: inline-block; font-size: var(--text-xs);
  background: var(--warning-bg); color: var(--warning-text);
  border-radius: 999px; padding: 4px 12px; margin: 0 6px 6px 0; cursor: pointer;
  text-decoration: none; border: none;
}
.dash-chip:hover { filter: brightness(0.97); }
.dash-empty { font-size: var(--text-xs); color: var(--text-light); }
.dash-link { font-size: var(--text-xs); color: var(--primary); text-decoration: none; display: inline-block; margin-top: 8px; }

.dash-grid4 { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 10px; }
.dash-grid4 button {
  background: var(--card-bg); border: 1px solid var(--border); border-radius: 10px;
  padding: 14px 8px; font-size: var(--text-sm); cursor: pointer;
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  transition: all .15s ease;
}
.dash-grid4 button .dash-ic { font-size: 1.4rem; }
.dash-grid4 button:hover { border-color: var(--primary); color: var(--primary); transform: translateY(-1px); box-shadow: var(--shadow-md); }

/* ── 骨架屏（数据加载占位） ── */
.dash-skeleton-card { min-height: 120px; }
.dash-skeleton-line {
  display: block; border-radius: 6px; margin: 8px 0;
  background: linear-gradient(90deg, var(--bg-alt) 25%, var(--border) 50%, var(--bg-alt) 75%);
  background-size: 200% 100%;
  animation: dash-shimmer 1.5s ease-in-out infinite;
}
.dash-skeleton-bar {
  display: block; height: 6px; border-radius: 3px;
  background: linear-gradient(90deg, var(--bg-alt) 25%, var(--border) 50%, var(--bg-alt) 75%);
  background-size: 200% 100%;
  animation: dash-shimmer 1.5s ease-in-out infinite;
}
.dash-skeleton-chip {
  display: inline-block; width: 120px; height: 28px; border-radius: 14px; margin: 4px 6px 4px 0;
  background: linear-gradient(90deg, var(--bg-alt) 25%, var(--border) 50%, var(--bg-alt) 75%);
  background-size: 200% 100%;
  animation: dash-shimmer 1.5s ease-in-out infinite;
}
@keyframes dash-shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ── 练习落地页分段 ── */
.segment-bar {
  display: flex; gap: 6px; background: var(--bg-alt);
  border-radius: 10px; padding: 4px; margin-bottom: 18px; max-width: 480px;
}
.segment-bar .segment {
  flex: 1; border: none; background: transparent; border-radius: 8px;
  padding: 7px 0; font-size: var(--text-sm); color: var(--text-secondary);
  cursor: pointer; font-family: var(--font-ui);
}
.segment-bar .segment.active { background: #fff; color: var(--primary); font-weight: 600; box-shadow: var(--shadow-sm); }
.segment-panel.hidden { display: none; }
.link-card {
  background: var(--card-bg); border: 1px solid var(--border); border-radius: 12px;
  padding: 18px; cursor: pointer; display: flex; align-items: center; gap: 12px;
  margin-bottom: 12px; transition: all .15s ease; max-width: 640px;
}
.link-card:hover { border-color: var(--primary); box-shadow: var(--shadow-md); transform: translateY(-1px); }
.link-card .link-ic { font-size: 1.6rem; }
.link-card .link-title { font-weight: 600; font-size: var(--text-sm); }
.link-card .link-desc { font-size: var(--text-xs); color: var(--text-secondary); }

/* ── Toast ── */
.app-toast {
  position: fixed; top: 64px; left: 50%; transform: translateX(-50%) translateY(-12px);
  background: rgba(15, 23, 42, 0.92); color: #fff;
  padding: 10px 20px; border-radius: 10px; font-size: var(--text-sm);
  opacity: 0; pointer-events: none; transition: all .2s ease; z-index: 1000;
  max-width: 90vw; text-align: center;
}
.app-toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.app-toast.error { background: rgba(220, 38, 38, 0.95); }
.app-toast.success { background: rgba(22, 163, 74, 0.95); }

/* ── 暗色模式适配（覆盖波1白底元素） ── */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]):not([data-theme="dark"]) {

      :root { --primary-light-2: #1e3a5f; --warning-bg: #2d1a0e; --warning-text: #fbbf24; }
      .app-header { background: #161b22; border-bottom-color: #30363d; }
      .app-header h1 { color: var(--text); }
      .header-actions .header-ai-btn { background: rgba(37, 99, 235, 0.18); color: #79b8ff; }
      .header-actions .user-profile-btn { border-color: #30363d; }
      .user-dropdown { background: var(--card-bg); border-color: #30363d; }
      .mobile-bottom-nav { background: #161b22; border-top-color: #30363d; }
      .mobile-bottom-nav .mb-link { color: #8b949e; }
      .mobile-bottom-nav .mb-link.active { color: #79b8ff; }
      .auth-wrap { background: linear-gradient(160deg, #111827, #161b22); }
      .auth-card, .login-gate-modal, .login-required-card { background: var(--card-bg); border-color: #30363d; }
      .auth-input { background: #161b22; border-color: #30363d; color: var(--text); }
      .dash-card { background: var(--card-bg); border-color: #30363d; }
      .dash-resume-box { background: #161b22; }
      .dash-grid4 button { background: var(--card-bg); border-color: #30363d; }
      .segment-bar { background: #161b22; }
      .segment-bar .segment.active { background: var(--card-bg); color: #79b8ff; }
      .link-card { background: var(--card-bg); border-color: #30363d; }
      .dash-hero .dash-cta a { background: #1e3a5f; color: #79b8ff; }
      .auth-notice { background: #2d1a0e; color: #fbbf24; }
  }
}
:root[data-theme="dark"] {

    :root { --primary-light-2: #1e3a5f; --warning-bg: #2d1a0e; --warning-text: #fbbf24; }
    .app-header { background: #161b22; border-bottom-color: #30363d; }
    .app-header h1 { color: var(--text); }
    .header-actions .header-ai-btn { background: rgba(37, 99, 235, 0.18); color: #79b8ff; }
    .header-actions .user-profile-btn { border-color: #30363d; }
    .user-dropdown { background: var(--card-bg); border-color: #30363d; }
    .mobile-bottom-nav { background: #161b22; border-top-color: #30363d; }
    .mobile-bottom-nav .mb-link { color: #8b949e; }
    .mobile-bottom-nav .mb-link.active { color: #79b8ff; }
    .auth-wrap { background: linear-gradient(160deg, #111827, #161b22); }
    .auth-card, .login-gate-modal, .login-required-card { background: var(--card-bg); border-color: #30363d; }
    .auth-input { background: #161b22; border-color: #30363d; color: var(--text); }
    .dash-card { background: var(--card-bg); border-color: #30363d; }
    .dash-resume-box { background: #161b22; }
    .dash-grid4 button { background: var(--card-bg); border-color: #30363d; }
    .segment-bar { background: #161b22; }
    .segment-bar .segment.active { background: var(--card-bg); color: #79b8ff; }
    .link-card { background: var(--card-bg); border-color: #30363d; }
    .dash-hero .dash-cta a { background: #1e3a5f; color: #79b8ff; }
    .auth-notice { background: #2d1a0e; color: #fbbf24; }
}