:root {
  --bg: #0f1115;
  --card: #1a1e26;
  --card-hover: #222733;
  --border: #2b3140;
  --text: #e8eaf0;
  --text-dim: #9aa3b2;
  --accent: #4f8cff;
  --accent-hover: #3d7bf0;
  --danger: #e05a5a;
  --radius: 12px;
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  min-height: 100vh;
}

/* ===== 登录页 ===== */
.auth-body {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.auth-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 40px 32px;
  width: 100%;
  max-width: 360px;
  text-align: center;
}
.auth-logo { font-size: 44px; margin-bottom: 8px; }
.auth-card h1 { font-size: 22px; margin-bottom: 6px; }
.auth-sub { color: var(--text-dim); font-size: 13px; margin-bottom: 24px; }
.auth-card input {
  width: 100%;
  padding: 12px 14px;
  margin-bottom: 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 15px;
  outline: none;
}
.auth-card input:focus { border-color: var(--accent); }
.auth-error { color: var(--danger); font-size: 13px; min-height: 18px; margin-top: 10px; }

/* ===== 通用按钮 ===== */
.btn {
  background: var(--card-hover);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 14px;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 14px;
  transition: background .15s;
}
.btn:hover { background: #2b3240; }
.btn-primary {
  background: var(--accent);
  border: none;
  color: #fff;
  padding: 12px 18px;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 15px;
  width: 100%;
  transition: background .15s;
}
.btn-primary:hover { background: var(--accent-hover); }

/* ===== 顶栏 ===== */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  background: var(--card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}
.topbar-left { display: flex; align-items: center; gap: 10px; }
.topbar-left .logo { font-size: 24px; }
.topbar-left h1 { font-size: 18px; }
.topbar-right { display: flex; align-items: center; gap: 10px; }
.user-badge {
  background: #22304d;
  color: #9cc0ff;
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 13px;
}
.user-badge.admin { background: #4d3a22; color: #ffd59c; }

/* ===== 筛选 ===== */
.filters {
  display: flex;
  gap: 8px;
  padding: 16px 24px 0;
  flex-wrap: wrap;
}
.filter {
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 8px 16px;
  border-radius: 999px;
  cursor: pointer;
  font-size: 14px;
  transition: all .15s;
}
.filter:hover { color: var(--text); }
.filter.active { background: var(--accent); border-color: var(--accent); color: #fff; }

/* ===== 内容网格 ===== */
main { padding: 20px 24px 60px; max-width: 1200px; margin: 0 auto; }
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
}
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform .15s, border-color .15s;
  animation: fadeIn .3s ease;
}
.card:hover { transform: translateY(-3px); border-color: #3a4356; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; } }

.card img.thumb {
  width: 100%;
  height: 180px;
  object-fit: cover;
  display: block;
  cursor: zoom-in;
  background: #000;
}
.card video {
  width: 100%;
  max-height: 320px;
  display: block;
  background: #000;
}
.card-text { padding: 14px; }
.card-text h3 { font-size: 15px; margin-bottom: 8px; word-break: break-word; }
.card-text p { font-size: 13px; color: var(--text-dim); white-space: pre-wrap; word-break: break-word; line-height: 1.6; }
.card-meta {
  padding: 0 14px 12px;
  font-size: 12px;
  color: var(--text-dim);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.card-del {
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 12px;
  padding: 2px 6px;
  border-radius: 6px;
}
.card-del:hover { color: var(--danger); background: #3a2121; }
.type-tag {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 999px;
  background: #22304d;
  color: #9cc0ff;
}
.type-tag.video { background: #3d2b4d; color: #d9b3ff; }
.type-tag.text { background: #23402c; color: #9ce0ac; }

.empty { text-align: center; padding: 80px 20px; color: var(--text-dim); }
.empty p:first-child { font-size: 18px; margin-bottom: 8px; }
.empty-sub { font-size: 14px; }

/* ===== 管理员面板 ===== */
.admin-panel {
  max-width: 1200px;
  margin: 24px auto 60px;
  padding: 24px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
}
.admin-panel h2 { font-size: 18px; margin-bottom: 16px; }
.admin-tabs { display: flex; gap: 8px; margin-bottom: 20px; flex-wrap: wrap; }
.admin-tab {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 8px 18px;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 14px;
}
.admin-tab.active { background: var(--accent); border-color: var(--accent); color: #fff; }
.admin-section h3 { font-size: 15px; margin: 16px 0 10px; color: var(--text); }
.admin-section hr { border: none; border-top: 1px solid var(--border); margin: 20px 0; }

.dropzone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 32px;
  text-align: center;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 14px;
  transition: border-color .15s, background .15s;
}
.dropzone:hover, .dropzone.dragover { border-color: var(--accent); background: #141926; }

.upload-progress { margin-top: 10px; font-size: 13px; color: #9cc0ff; }

textarea, .admin-section input[type="text"], .admin-section input[type="password"], .admin-section select {
  width: 100%;
  padding: 10px 12px;
  margin-bottom: 10px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 14px;
  outline: none;
  font-family: inherit;
}
textarea { resize: vertical; }
.admin-section input:focus, .admin-section textarea:focus, .admin-section select:focus { border-color: var(--accent); }

.row-form { display: flex; gap: 10px; align-items: stretch; flex-wrap: wrap; }
.row-form input, .row-form select { flex: 1; min-width: 120px; margin-bottom: 0; }
.row-form .btn-primary { width: auto; padding: 10px 20px; }

.user-table { width: 100%; border-collapse: collapse; font-size: 14px; margin-top: 8px; }
.user-table th, .user-table td {
  text-align: left;
  padding: 10px 8px;
  border-bottom: 1px solid var(--border);
}
.user-table th { color: var(--text-dim); font-weight: normal; font-size: 13px; }
.user-table .btn { padding: 5px 10px; font-size: 13px; margin-right: 6px; }
.user-table .btn-danger { border-color: #5a2a2a; color: var(--danger); }
.user-table .btn-danger:hover { background: #3a2121; }
.role-chip { font-size: 12px; padding: 3px 10px; border-radius: 999px; background: #22304d; color: #9cc0ff; }
.role-chip.admin { background: #4d3a22; color: #ffd59c; }

/* ===== 灯箱 ===== */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, .92);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.lightbox-content { max-width: 92vw; max-height: 92vh; position: relative; text-align: center; }
.lightbox-content img { max-width: 92vw; max-height: 84vh; border-radius: 8px; }
.lightbox-title { margin-top: 10px; color: var(--text); font-size: 14px; }
.lightbox-close {
  position: absolute;
  top: -12px;
  right: -12px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: none;
  background: #333a47;
  color: #fff;
  font-size: 16px;
  cursor: pointer;
}
.lightbox-close:hover { background: var(--danger); }

@media (max-width: 640px) {
  .topbar { padding: 12px 16px; }
  .filters { padding: 12px 16px 0; }
  main { padding: 16px; }
  .admin-panel { margin: 16px; padding: 16px; }
  .grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; }
}