/* ============================================================
   Helpme 个人中心样式（酷黑蓝紫风格，与 style.css 统一）
   ============================================================ */

.user-container {
  max-width: 980px;
  padding-top: 48px;
  padding-bottom: 80px;
}

/* ---------- 未登录：登录/注册卡片 ---------- */
.auth-card {
  max-width: 460px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 32px 28px;
  box-shadow: var(--shadow-card);
}

.auth-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 26px;
  background: rgba(var(--fg-rgb), 0.04);
  border-radius: 12px;
  padding: 4px;
}

.auth-tab {
  flex: 1;
  padding: 10px 0;
  border: none;
  border-radius: 9px;
  background: transparent;
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s ease;
}

.auth-tab.active {
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  color: var(--text-1);
  box-shadow: 0 4px 14px rgba(var(--accent-1-rgb), 0.35);
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

/* hidden 属性切换时须真正隐藏（.auth-form 的 display:flex 会覆盖 hidden，必须显式声明） */
.auth-form[hidden] {
  display: none;
}

.auth-form input,
.publish-form input,
.publish-form textarea {
  width: 100%;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: rgba(var(--fg-rgb), 0.04);
  color: var(--text-primary);
  font-size: 14px;
  font-family: var(--font-family);
  outline: none;
  transition: border-color 0.2s ease;
}

.auth-form input:focus,
.publish-form input:focus,
.publish-form textarea:focus {
  border-color: rgba(var(--accent-1-rgb), 0.65);
}

.auth-form input::placeholder,
.publish-form input::placeholder,
.publish-form textarea::placeholder {
  color: var(--text-muted);
}

.auth-form .btn {
  margin-top: 6px;
}

.auth-tip {
  margin-top: 18px;
  text-align: center;
  font-size: 12px;
  color: var(--text-muted);
}

.auth-error {
  min-height: 18px;
  font-size: 13px;
  color: var(--c-danger);
  text-align: center;
}

/* ---------- 已登录：用户信息卡 ---------- */
.profile-card {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 24px 28px;
  background: linear-gradient(135deg, rgba(var(--accent-1-rgb), 0.14), rgba(var(--accent-2-rgb), 0.10));
  border: 1px solid rgba(var(--accent-1-rgb), 0.30);
  border-radius: var(--radius-lg);
  margin-bottom: 22px;
}

.profile-avatar {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  box-shadow: 0 6px 20px rgba(var(--accent-1-rgb), 0.4);
  overflow: hidden;
}

.profile-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
}

.profile-avatar-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.avatar-edit {
  border: none;
  background: none;
  color: var(--accent-1);
  font-size: 12.5px;
  cursor: pointer;
  padding: 0;
}

.avatar-edit:hover {
  text-decoration: underline;
}

.avatar-tip {
  font-size: 12.5px;
  color: var(--text-muted);
  margin: 4px 0 12px;
}

.avatar-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 14px;
}

.avatar-upload {
  cursor: pointer;
}

.profile-info {
  flex: 1;
}

.profile-info h2 {
  font-size: 20px;
  margin-bottom: 4px;
}

.role-badge {
  display: inline-block;
  padding: 3px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  background: rgba(var(--fg-rgb), 0.08);
  border: 1px solid var(--border-strong);
  color: var(--text-secondary);
}

.role-badge.role-admin {
  background: linear-gradient(135deg, rgba(var(--accent-1-rgb), 0.30), rgba(var(--accent-2-rgb), 0.28));
  color: var(--text-1);
  border-color: transparent;
}

/* ---------- 面板卡片 ---------- */
.panel-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px 26px;
  margin-bottom: 22px;
}

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.panel-head h3 {
  font-size: 17px;
}

.panel-count {
  font-size: 13px;
  color: var(--text-muted);
}

.empty-tip {
  padding: 26px 0;
  text-align: center;
  color: var(--text-muted);
  font-size: 14px;
}

/* ---------- 收藏列表 ---------- */
.fav-item {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 16px;
  margin-bottom: 12px;
  background: rgba(var(--fg-rgb), 0.02);
}

.fav-item-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.fav-item-title {
  font-size: 14px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--text-primary);
}

.fav-item-meta {
  margin-top: 8px;
  font-size: 12px;
  color: var(--text-muted);
}

.fav-item-body {
  margin-top: 10px;
  padding: 12px 14px;
  border-radius: 8px;
  background: rgba(var(--fg-rgb), 0.03);
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.7;
  display: none;
  white-space: pre-wrap;
}

.fav-item-body.open { display: block; }

.btn-sm {
  padding: 5px 12px;
  font-size: 12px;
  border-radius: 8px;
  border: 1px solid var(--border-strong);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.btn-sm:hover {
  color: var(--text-primary);
  border-color: rgba(var(--accent-1-rgb), 0.6);
}

.btn-sm.btn-danger:hover {
  color: var(--c-danger);
  border-color: rgba(var(--c-danger-rgb), 0.6);
}

.fav-actions {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

/* ---------- 作业 ---------- */
.publish-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 6px;
}

.publish-form .form-row {
  display: grid;
  grid-template-columns: 1fr 220px;
  gap: 12px;
}

.publish-form textarea {
  min-height: 90px;
  resize: vertical;
}

.publish-form .btn {
  align-self: flex-start;
}

.asg-item {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 18px;
  margin-bottom: 14px;
  background: rgba(var(--fg-rgb), 0.02);
}

.asg-item-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}

.asg-item-title {
  font-size: 15px;
  font-weight: 700;
}

.asg-deadline {
  font-size: 12px;
  color: var(--text-muted);
  white-space: nowrap;
}

.asg-deadline.expired { color: var(--c-danger); }

.asg-content {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.7;
  white-space: pre-wrap;
  margin-bottom: 12px;
}

.asg-status {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  background: rgba(var(--fg-rgb), 0.06);
  color: var(--text-secondary);
}

.asg-status.submitted {
  background: rgba(var(--c-success-rgb), 0.14);
  color: var(--c-success-soft);
}

.asg-status.expired {
  background: rgba(var(--c-danger-rgb), 0.12);
  color: var(--c-danger);
}

.submit-box {
  margin-top: 10px;
  padding-top: 12px;
  border-top: 1px dashed var(--border);
}

.submit-box textarea {
  width: 100%;
  min-height: 70px;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: rgba(var(--fg-rgb), 0.03);
  color: var(--text-primary);
  font-size: 13px;
  font-family: var(--font-family);
  resize: vertical;
  outline: none;
}

.submit-box textarea:focus { border-color: rgba(var(--accent-1-rgb), 0.65); }

.submit-box .submit-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 10px;
}

.submit-box .submit-time {
  font-size: 12px;
  color: var(--text-muted);
}

/* ---------- 响应式 ---------- */
@media (max-width: 640px) {
  .publish-form .form-row {
    grid-template-columns: 1fr;
  }
  .profile-card {
    flex-wrap: wrap;
  }
}

/* ---------- 注册：手机号 + 验证码 ---------- */
.code-row {
  display: flex;
  gap: 10px;
}

.code-row input {
  flex: 1;
  min-width: 0;
}

.code-btn {
  flex-shrink: 0;
  white-space: nowrap;
  padding: 10px 14px;
}

.code-btn:disabled {
  opacity: 0.65;
  cursor: not-allowed;
}

/* ---------- 注册：头像选择 ---------- */
.avatar-field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.avatar-label {
  font-size: 13px;
  color: var(--text-secondary);
}

.avatar-options {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.avatar-option {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(var(--fg-rgb), 0.04);
  font-size: 24px;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
}

.avatar-option:hover {
  border-color: rgba(var(--accent-1-rgb), 0.65);
  transform: translateY(-2px);
}

.avatar-option.active {
  border-color: var(--accent-1);
  background: linear-gradient(135deg, rgba(var(--accent-1-rgb), 0.28), rgba(var(--accent-2-rgb), 0.24));
  box-shadow: 0 0 0 2px rgba(var(--accent-1-rgb), 0.35);
}

/* ---------- 测试模式验证码提示 ---------- */
.dev-code {
  font-size: 13px;
  color: var(--c-warn);
  text-align: center;
  line-height: 1.5;
  padding: 8px 10px;
  border-radius: 8px;
  background: rgba(var(--c-warn-rgb), 0.08);
  border: 1px dashed rgba(var(--c-warn-rgb), 0.45);
}

.dev-code[hidden] {
  display: none;
}

/* ---------- 个人中心：手机号 ---------- */
.profile-phone {
  margin-top: 5px;
  font-size: 13px;
  color: var(--text-muted);
}

.profile-stats {
  margin-top: 8px;
  font-size: 13px;
  color: var(--text-secondary);
}

.profile-stats b {
  color: var(--c-warn-soft);
  font-weight: 700;
}

/* ---------- 个人中心：错题集（按科目分组） ---------- */
.panel-foot {
  margin-top: 14px;
  text-align: center;
}

.mk-group {
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-bottom: 12px;
  overflow: hidden;
}

.mk-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  background: rgba(var(--fg-rgb), 0.04);
  font-size: 14px;
  font-weight: 600;
}

.mk-count {
  font-size: 12.5px;
  color: var(--text-muted);
  font-weight: 500;
}

.mk-head {
  cursor: pointer;
  user-select: none;
}

.mk-head:hover {
  background: rgba(var(--fg-rgb), 0.07);
}

.mk-name {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.mk-caret {
  display: inline-block;
  width: 14px;
  color: var(--accent-1);
  font-size: 12px;
  transition: transform 0.2s ease;
}

.mk-pager {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px dashed var(--border);
}

.mk-pager .btn-sm {
  border: 1px solid var(--border);
  background: rgba(var(--fg-rgb), 0.04);
  color: var(--text-secondary);
  border-radius: 8px;
  padding: 5px 12px;
  font-size: 12px;
  cursor: pointer;
}

.mk-pager .btn-sm:hover:not(:disabled) {
  color: var(--text-1);
  border-color: rgba(var(--accent-1-rgb), 0.6);
}

.mk-pager .btn-sm:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.mk-page {
  font-size: 12.5px;
  color: var(--text-muted);
}

.mk-body {
  padding: 12px 14px;
}

.mk-item {
  padding: 10px 0;
  border-bottom: 1px dashed var(--border);
}

.mk-item:last-child {
  border-bottom: none;
}

.mk-q {
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 6px;
}

.mk-opt {
  display: flex;
  gap: 8px;
  font-size: 13px;
  padding: 3px 0;
  color: var(--text-secondary);
}

.mk-opt.ans {
  color: var(--c-success-soft);
}

.mk-opt.user {
  color: var(--c-danger-soft);
}

.mk-line {
  margin-top: 6px;
  font-size: 13px;
  color: var(--text-secondary);
}

.mk-line b.u {
  color: var(--c-danger-soft);
}

.mk-line b.r {
  color: var(--c-success-soft);
}

.mk-explain {
  margin-top: 6px;
  font-size: 12.5px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ============================================================
   设置面板（个人资料 / 外观 / 账号）
   配色全部走主题变量，四套主题自动适配
   ============================================================ */
.settings-card {
  padding: 0;
  overflow: hidden;
}

/* 顶部标题区：整块可点，用于折叠 / 展开 */
.settings-head {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 26px;
  background: linear-gradient(135deg, rgba(var(--accent-1-rgb), 0.16), rgba(var(--accent-2-rgb), 0.10));
  border: none;
  border-bottom: 1px solid transparent;
  font-family: inherit;
  cursor: pointer;
  text-align: left;
  transition: filter .2s ease, border-color .2s ease;
}
.settings-head:hover { filter: brightness(1.08); }
.settings-card.open .settings-head { border-bottom-color: var(--border); }

.settings-head-text { flex: 1 1 auto; min-width: 0; }
.settings-head-title {
  display: block;
  font-size: 17px;
  font-weight: 700;
  color: var(--text-1);
  line-height: 1.3;
}
.settings-head-sub {
  display: block;
  margin-top: 3px;
  font-size: 12.5px;
  color: var(--text-3);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* 右侧箭头：收起时朝下，展开时朝上 */
.settings-chevron {
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  margin-right: 5px;
  margin-top: -5px;
  border-right: 2px solid var(--text-3);
  border-bottom: 2px solid var(--text-3);
  transform: rotate(45deg);
  transition: transform .25s ease, margin .25s ease, border-color .2s ease;
}
.settings-head:hover .settings-chevron { border-color: var(--text-1); }
.settings-card.open .settings-chevron { transform: rotate(225deg); margin-top: 5px; }

/* 分组 */
.settings-group { padding: 22px 26px; border-bottom: 1px solid var(--border); }
.settings-group:last-child { border-bottom: none; }
.settings-group-title {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--text-3);
  text-transform: uppercase;
}
.settings-group-title::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--border-strong), transparent);
}

/* 每一行设置：左说明 / 右控件 */
.setting-item {
  display: grid;
  grid-template-columns: minmax(180px, 240px) 1fr;
  gap: 20px;
  align-items: center;
  padding: 14px 0;
}
.setting-item + .setting-item { border-top: 1px dashed var(--border); }
.setting-item-block { grid-template-columns: 1fr; gap: 14px; }
.setting-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-1);
  margin-bottom: 4px;
}
.setting-desc {
  font-size: 12.5px;
  color: var(--text-3);
  line-height: 1.6;
}
.setting-control {
  display: flex;
  align-items: center;
  gap: 10px;
  justify-content: flex-end;
}

/* 输入框 + 字数 */
.input-wrap {
  position: relative;
  flex: 1 1 auto;
  max-width: 340px;
}
.setting-input {
  width: 100%;
  padding: 11px 54px 11px 14px;
  border-radius: 12px;
  border: 1px solid var(--border-strong);
  background: rgba(var(--fg-rgb), 0.04);
  color: var(--text-1);
  font-size: 14px;
  font-family: inherit;
  transition: border-color .2s ease, box-shadow .2s ease, background .2s ease;
}
.setting-input::placeholder { color: var(--text-3); }
.setting-input:hover { border-color: rgba(var(--accent-1-rgb), 0.45); }
.setting-input:focus {
  outline: none;
  border-color: var(--accent-1);
  background: rgba(var(--accent-1-rgb), 0.07);
  box-shadow: 0 0 0 3px rgba(var(--accent-1-rgb), 0.16);
}
.input-count {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 11.5px;
  color: var(--text-3);
  pointer-events: none;
  font-variant-numeric: tabular-nums;
}
.btn-sm { padding: 10px 18px; font-size: 13.5px; }

/* 头像选择：整块可点，悬停出现铅笔角标 */
.avatar-picker {
  position: relative;
  padding: 0;
  border: none;
  background: none;
  cursor: pointer;
  border-radius: 50%;
  line-height: 0;
}
.setting-avatar {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 26px;
  overflow: hidden;
  background: linear-gradient(135deg,
    rgba(var(--accent-1-rgb), 0.30), rgba(var(--accent-2-rgb), 0.30));
  border: 1px solid rgba(var(--accent-1-rgb), 0.40);
  transition: transform .2s ease, box-shadow .2s ease;
}
.setting-avatar img { width: 100%; height: 100%; object-fit: cover; }
.avatar-picker:hover .setting-avatar {
  transform: scale(1.05);
  box-shadow: 0 8px 22px rgba(var(--accent-1-rgb), 0.35);
}
.avatar-picker-badge {
  position: absolute;
  right: -2px;
  bottom: -2px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 11px;
  color: var(--text-1);
  background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
  border: 2px solid var(--bg-card);
}

/* 主题选择：卡片式缩略预览 */
.theme-picker {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
}
.theme-opt {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  border-radius: 16px;
  border: 1px solid var(--border-strong);
  background: rgba(var(--fg-rgb), 0.03);
  cursor: pointer;
  font-family: inherit;
  text-align: left;
  transition: transform .2s ease, border-color .2s ease, background .2s ease, box-shadow .2s ease;
}
.theme-opt:hover {
  transform: translateY(-3px);
  border-color: rgba(var(--accent-1-rgb), 0.55);
  box-shadow: 0 10px 24px rgba(var(--shadow-rgb), 0.18);
}
.theme-opt.on {
  border-color: var(--accent-1);
  background: rgba(var(--accent-1-rgb), 0.10);
  box-shadow: 0 0 0 1px var(--accent-1), 0 8px 22px rgba(var(--accent-1-rgb), 0.22);
}

/* 缩略图：用 4 个色块模拟该主题的页面观感 */
.theme-preview {
  width: 46px;
  height: 38px;
  flex: 0 0 auto;
  border-radius: 9px;
  padding: 6px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  background: var(--tp-bg);
  border: 1px solid rgba(var(--fg-rgb), 0.14);
  overflow: hidden;
}
.theme-preview .tp-bar {
  height: 5px;
  border-radius: 3px;
  background: var(--tp-accent);
  width: 60%;
}
.theme-preview .tp-card {
  flex: 1;
  border-radius: 5px;
  background: var(--tp-card);
  border: 1px solid rgba(var(--fg-rgb), 0.10);
  padding: 3px 4px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 3px;
}
.theme-preview .tp-line {
  height: 3px;
  border-radius: 2px;
  background: var(--tp-text);
  opacity: .55;
}
.theme-preview .tp-line.short { width: 55%; opacity: .3; }

.theme-info { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.theme-name { font-size: 13.5px; font-weight: 600; color: var(--text-1); }
.theme-desc { font-size: 11.5px; color: var(--text-3); }
.theme-check {
  position: absolute;
  top: 9px;
  right: 10px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  display: none;
  place-items: center;
  font-size: 11px;
  color: var(--text-1);
  background: var(--accent-1);
}
.theme-opt.on .theme-check { display: grid; }

/* 账号信息：小方块 */
.account-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px;
}
.account-tile {
  padding: 12px 14px;
  border-radius: 13px;
  background: rgba(var(--fg-rgb), 0.04);
  border: 1px solid var(--border);
}
.account-tile .at-label {
  font-size: 11.5px;
  color: var(--text-3);
  margin-bottom: 5px;
}
.account-tile .at-value {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-1);
  word-break: break-all;
}

/* 窄屏堆叠 */
@media (max-width: 640px) {
  .settings-head { padding: 15px 18px; }
  .settings-group { padding: 18px; }
  .setting-item { grid-template-columns: 1fr; gap: 10px; }
  .setting-control { justify-content: flex-start; }
  .input-wrap { max-width: none; }
  .theme-picker { grid-template-columns: 1fr; }
}