/* =========================================================
   AI学习站 · 管理后台样式
   复用 style.css 的设计令牌（品牌粉 / 蓝 / 紫、圆角、阴影）
   ========================================================= */

body { background: var(--bg); }

/* ---------- 登录页 ---------- */
.admin-login {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  background:
    radial-gradient(900px 500px at 12% 0%, rgba(251,114,153,.14), transparent 60%),
    radial-gradient(900px 500px at 100% 100%, rgba(0,174,236,.14), transparent 60%),
    var(--bg);
}
.admin-login[hidden] { display: none; }

.login-card {
  width: 100%;
  max-width: 400px;
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 32px 30px 30px;
  animation: popIn .42s var(--ease-spring);
}
.login-brand {
  display: flex; align-items: center; gap: 13px;
  margin-bottom: 24px;
}
.login-logo {
  width: 48px; height: 48px; border-radius: 14px;
  display: grid; place-items: center;
  background: var(--grad-brand);
  color: #fff; font-weight: 800; font-size: 17px;
  box-shadow: var(--shadow-brand);
  flex-shrink: 0;
}
.login-brand h1 { font-size: 19px; font-weight: 800; letter-spacing: -.2px; }
.login-brand p { font-size: 12.5px; color: var(--text-3); margin-top: 2px; }

.login-form .field { margin-bottom: 16px; }
.login-submit { width: 100%; margin-top: 6px; letter-spacing: 4px; }

/* ---------- 后台布局 ---------- */
.admin-dash[hidden] { display: none; }

.admin-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.82);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  backdrop-filter: saturate(180%) blur(16px);
  border-bottom: 1px solid var(--line-2);
}
.admin-header__inner {
  max-width: var(--page-max);
  margin: 0 auto; padding: 0 24px;
  height: var(--nav-h);
  display: flex; align-items: center; gap: 18px;
}
.admin-header .brand-logo { font-weight: 800; font-size: 15px; color: #fff; }
.admin-header__account {
  margin-left: auto;
  display: flex; align-items: center; gap: 10px;
  font-size: 14px; font-weight: 600; color: var(--text-2);
}
.admin-avatar {
  width: 34px; height: 34px; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--grad-brand-2); color: #fff;
  font-weight: 800; font-size: 14px; flex-shrink: 0;
}

/* ---------- 内容卡片列表 ---------- */
.admin-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 16px;
}
.admin-list[hidden] { display: none; }

.admin-card {
  background: var(--surface);
  border: 1px solid var(--line-2);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 14px;
  display: flex; gap: 14px;
  transition: transform .22s var(--ease-out), box-shadow .22s var(--ease-out), border-color .22s;
  animation: fadeUp .4s var(--ease-out) both;
}
.admin-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--line); }

.admin-card__thumb {
  width: 116px; flex-shrink: 0;
  align-self: flex-start;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: linear-gradient(135deg, #E9EBEF, #DDE0E5);
  display: grid; place-items: center;
  color: var(--text-3); font-size: 12px;
}
/* 封面自适应：按图片原始比例完整展示，不强行裁切（上限防竖图过长） */
.admin-card__thumb img { width: 100%; height: auto; max-height: 210px; object-fit: contain; }

.admin-card__body { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 7px; }
.admin-card__title {
  font-size: 14.5px; font-weight: 700; line-height: 1.45;
  color: var(--text);
  word-break: break-all;
}
.admin-card__meta { font-size: 12px; color: var(--text-3); display: flex; align-items: center; gap: 7px; flex-wrap: wrap; }
.admin-card__meta b { color: var(--text-2); font-weight: 600; }

.tag-row { display: flex; flex-wrap: wrap; gap: 6px; }
.tag-chip {
  font-size: 11.5px; font-weight: 600;
  padding: 2px 9px; border-radius: var(--radius-pill);
  background: var(--violet-soft); color: var(--violet);
}
.tag-chip--none { background: var(--surface-2); color: var(--text-4); }

.status-badge {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 11.5px; font-weight: 700;
  padding: 2px 10px; border-radius: var(--radius-pill);
}
.status-badge::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.status-approved { background: var(--ok-soft); color: var(--ok); }
.status-pending  { background: var(--warn-soft); color: var(--warn); }
.status-removed  { background: var(--danger-soft); color: var(--danger); }

.featured-flag {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 11px; font-weight: 700;
  padding: 2px 9px; border-radius: var(--radius-pill);
  background: var(--brand-soft); color: var(--brand-700);
}

.admin-card__actions {
  display: flex; flex-wrap: wrap; gap: 7px;
  margin-top: 4px;
}
.admin-card__actions .btn { height: 32px; padding: 0 12px; font-size: 12.5px; }

/* ---------- 举报列表 ---------- */
.admin-report-list { display: flex; flex-direction: column; gap: 12px; }
.admin-report-list[hidden] { display: none; }

.report-card {
  background: var(--surface);
  border: 1px solid var(--line-2);
  border-left: 4px solid var(--warn);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 14px 16px;
  display: flex; align-items: center; gap: 14px;
  flex-wrap: wrap;
  animation: fadeUp .4s var(--ease-out) both;
}
.report-card__main { flex: 1; min-width: 220px; display: flex; flex-direction: column; gap: 5px; }
.report-card__reason { font-size: 14px; font-weight: 700; color: var(--text); }
.report-card__target { font-size: 12.5px; color: var(--text-2); }
.report-card__target b { color: var(--brand); }
.report-card__detail { font-size: 12px; color: var(--text-3); }
.report-card__kind {
  font-size: 11px; font-weight: 700; padding: 2px 9px; border-radius: var(--radius-pill);
  background: var(--accent-soft); color: var(--accent-600);
}
.report-card__actions { display: flex; gap: 8px; }
.report-card__actions .btn { height: 34px; padding: 0 14px; font-size: 13px; }

/* ---------- 响应式 ---------- */
@media (max-width: 768px) {
  .admin-header__inner { padding: 0 14px; height: 58px; }
  .admin-header .brand-text h1 { font-size: 16px; }
  .admin-header__account #admin-user-label { display: none; }
  .admin-list { grid-template-columns: 1fr; }
  .admin-card__thumb { width: 96px; }
  .page-main { padding: 16px 14px 50px; }
}
@media (max-width: 430px) {
  .admin-card { flex-direction: column; }
  .admin-card__thumb { width: 100%; }
}

/* ---------- 公告管理 ---------- */
.notice-box {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.notice-current {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 12px 14px;
  border-radius: var(--radius-md, 12px);
  background: var(--brand-soft, #EFF6FF);
  border: 1px solid var(--brand-soft-2, #DBEAFE);
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--brand-700, #1E40AF);
}
.notice-current__label {
  font-size: 12px;
  font-weight: 800;
  color: var(--brand, #2563EB);
  flex-shrink: 0;
}
.notice-actions {
  display: flex;
  gap: 10px;
}

/* ---------- 发布内容 / 标签管理 ---------- */
.pub-box {
  margin-top: 14px;
}
.pub-pane {
  display: flex;
  flex-direction: column;
  gap: 11px;
}
.pub-pane[hidden] { display: none; }
.pub-row--2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 11px;
}
@media (max-width: 640px) {
  .pub-row--2 { grid-template-columns: 1fr; }
}
#tagManageList .chip { gap: 6px; }
#tagManageList .chip__del {
  display: inline-grid;
  place-items: center;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: rgba(37, 99, 235, .14);
  color: var(--brand, #2563EB);
  font-size: 11px;
  line-height: 1;
  cursor: pointer;
  border: 0;
  padding: 0;
}
#tagManageList .chip__del:hover { background: var(--danger, #EF4444); color: #fff; }