/* ===== 主题变量 ===== */
:root {
  --bg: #f4f6fb;
  --bg-1: #eef2ff;
  --bg-2: #fdf2f8;
  --card: rgba(255, 255, 255, 0.72);
  --card-border: rgba(255, 255, 255, 0.85);
  --text: #1f2937;
  --text-soft: #6b7280;
  --input-bg: rgba(255, 255, 255, 0.85);
  --accent: #6366f1;
  --accent-2: #ec4899;
  --shadow: 0 12px 40px rgba(31, 41, 55, 0.12);
  --danger: #ef4444;
  --success: #10b981;
  --line: rgba(31, 41, 55, 0.08);
}
[data-theme="dark"] {
  --bg: #0b1020;
  --bg-1: #111a33;
  --bg-2: #1a1033;
  --card: rgba(255, 255, 255, 0.06);
  --card-border: rgba(255, 255, 255, 0.12);
  --text: #e5e7eb;
  --text-soft: #9ca3af;
  --input-bg: rgba(255, 255, 255, 0.05);
  --accent: #818cf8;
  --accent-2: #f472b6;
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
  --line: rgba(255, 255, 255, 0.08);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", Roboto, sans-serif;
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 10% -10%, var(--bg-1), transparent 60%),
    radial-gradient(1000px 500px at 110% 10%, var(--bg-2), transparent 55%),
    var(--bg);
  min-height: 100vh;
  padding: 32px 16px 64px;
  transition: background 0.4s ease, color 0.4s ease;
}

/* ===== 布局 ===== */
.wrap { max-width: 560px; margin: 0 auto; }
.admin-wrap { max-width: 880px; }

.card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 22px;
  padding: 32px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(24px) saturate(160%);
  -webkit-backdrop-filter: blur(24px) saturate(160%);
  margin-bottom: 20px;
}

.brand { display: flex; align-items: center; gap: 12px; margin-bottom: 6px; }
.logo { font-size: 34px; line-height: 1; }
h1 { font-size: 24px; font-weight: 700; letter-spacing: -0.02em; }
.subtitle { color: var(--text-soft); font-size: 14px; margin-bottom: 20px; }

.section-title { font-size: 16px; font-weight: 600; margin-bottom: 16px; }

/* ===== 表单 ===== */
.form { display: flex; flex-direction: column; gap: 16px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.label { font-size: 13px; color: var(--text-soft); }

.input {
  width: 100%;
  padding: 12px 14px;
  font-size: 15px;
  color: var(--text);
  background: var(--input-bg);
  border: 1px solid var(--line);
  border-radius: 12px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
  font-family: inherit;
}
.input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 25%, transparent);
}
textarea.input { resize: vertical; }

.btn-primary {
  align-self: flex-start;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 8px 22px color-mix(in srgb, var(--accent) 40%, transparent);
  transition: transform 0.18s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.2s;
}
.btn-primary:hover { transform: translateY(-2px) scale(1.02); }
.btn-primary:active { transform: translateY(0) scale(0.99); }

.btn-danger {
  padding: 6px 14px;
  font-size: 13px;
  color: #fff;
  background: var(--danger);
  border: none;
  border-radius: 9px;
  cursor: pointer;
  transition: opacity 0.2s;
}
.btn-danger:hover { opacity: 0.85; }

.btn-ghost {
  padding: 8px 16px;
  font-size: 14px;
  color: var(--text);
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: 10px;
  transition: background 0.2s;
}
.btn-ghost:hover { background: var(--input-bg); }

.btn-sm { padding: 8px 16px; font-size: 14px; }
.btn-xs { padding: 5px 9px; font-size: 12px; }
.input-sm { padding: 8px 12px; font-size: 14px; }
.input-xs { padding: 5px 9px; font-size: 12px; }

.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  padding: 0;
  font-size: 13px;
  color: var(--text-soft);
  background: var(--input-bg);
  border: 1px solid var(--line);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.15s;
}
.btn-icon:hover { color: var(--accent); border-color: var(--accent); }
.btn-icon:disabled { opacity: 0.35; cursor: not-allowed; }
.btn-icon.danger:hover { color: var(--danger); border-color: var(--danger); }

/* ===== 提示 ===== */
.alert {
  padding: 12px 16px;
  border-radius: 12px;
  font-size: 14px;
  margin-bottom: 18px;
  border: 1px solid transparent;
}
.alert-error { background: color-mix(in srgb, var(--danger) 14%, transparent); color: var(--danger); }
.alert-success { background: color-mix(in srgb, var(--success) 16%, transparent); color: var(--success); }

/* ===== 主题按钮 ===== */
.theme-toggle {
  position: fixed;
  top: 18px;
  right: 18px;
  width: 42px;
  height: 42px;
  font-size: 18px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--card);
  backdrop-filter: blur(12px);
  cursor: pointer;
  z-index: 50;
  transition: transform 0.2s;
}
.theme-toggle:hover { transform: scale(1.1) rotate(12deg); }

/* ===== 后台 ===== */
.admin-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.head-actions { display: flex; gap: 10px; }

.inline-form { display: flex; gap: 10px; margin-bottom: 18px; flex-wrap: wrap; }
.inline-form .input { flex: 1; min-width: 200px; }

.cat-manage { display: flex; flex-wrap: wrap; gap: 10px; }
.cat-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 4px 4px 12px;
  background: var(--input-bg);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 14px;
}
.cat-chip .x {
  width: 22px; height: 22px;
  border-radius: 50%;
  border: none;
  background: color-mix(in srgb, var(--danger) 18%, transparent);
  color: var(--danger);
  cursor: pointer;
  font-size: 15px;
  line-height: 1;
}
.cat-chip .x:hover { background: var(--danger); color: #fff; }
.cat-chip .btn-icon { width: 22px; height: 22px; border-radius: 50%; }

.filters { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 18px; }
.sub-filters { margin-top: -6px; margin-bottom: 18px; }
.chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 7px 14px;
  font-size: 13px;
  text-decoration: none;
  white-space: nowrap;
  color: var(--text-soft);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 999px;
  transition: all 0.2s;
  font-family: inherit;
  cursor: pointer;
  line-height: 1.4;
  flex-shrink: 0;
}
.chip:hover { color: var(--text); border-color: var(--accent); }
.chip-active {
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-color: transparent;
}

/* ===== 前台分类选择器（横向滑动） ===== */
.cat-row {
  display: flex;
  flex-wrap: nowrap;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 6px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--line) transparent;
}
.cat-row::-webkit-scrollbar { height: 5px; }
.cat-row::-webkit-scrollbar-track { background: transparent; }
.cat-row::-webkit-scrollbar-thumb { background: var(--line); border-radius: 999px; }
.sub-row { min-height: 36px; align-items: center; }
.empty-sub { color: var(--text-soft); font-size: 13px; padding: 6px 2px; white-space: nowrap; }

.sub-list { list-style: none; display: flex; flex-direction: column; gap: 14px; }
.sub-item {
  background: var(--input-bg);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 16px;
}
.sub-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
.tag {
  font-size: 12px;
  padding: 3px 10px;
  border-radius: 999px;
  color: var(--accent);
  background: color-mix(in srgb, var(--accent) 14%, transparent);
}
.sub-time { font-size: 12px; color: var(--text-soft); }
.sub-content { font-size: 15px; line-height: 1.6; white-space: pre-wrap; word-break: break-word; }
.sub-foot {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--line);
}
.sub-ip { font-size: 12px; color: var(--text-soft); }

/* ===== 后台分类管理（紧凑列表） ===== */
.cat-mgmt { padding: 24px; }

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.section-head .section-title { margin: 0; }

.add-top-form { display: flex; gap: 8px; margin: 0; }
.add-top-form .input-sm { width: 180px; min-width: 120px; }

.cat-list-header {
  display: grid;
  grid-template-columns: 140px 1fr 150px;
  gap: 12px;
  padding: 0 12px 8px;
  font-size: 12px;
  color: var(--text-soft);
  font-weight: 500;
  border-bottom: 1px solid var(--line);
}
.cat-list { display: flex; flex-direction: column; }

.cat-grid-row {
  display: grid;
  grid-template-columns: 140px 1fr 150px;
  gap: 12px;
  align-items: center;
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  transition: background 0.15s;
}
.cat-grid-row:hover { background: color-mix(in srgb, var(--accent) 5%, transparent); }
.cat-grid-row:last-child { border-bottom: none; }

.col-name { display: flex; align-items: center; }
.cat-top-tag {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-radius: 999px;
  box-shadow: 0 4px 12px color-mix(in srgb, var(--accent) 35%, transparent);
  white-space: nowrap;
}

.col-subs { min-width: 0; }
.subs-wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.sub-chip {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 3px 3px 3px 10px;
  background: var(--input-bg);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 13px;
  white-space: nowrap;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.sub-chip:hover { border-color: var(--accent); box-shadow: 0 2px 8px color-mix(in srgb, var(--accent) 20%, transparent); }
.sub-name { padding: 2px 0; }

.sub-tools {
  display: inline-flex;
  align-items: center;
  gap: 1px;
  margin-left: 2px;
}
.sub-tools .inline-form { margin: 0; }
.sub-tools .micro {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  padding: 0;
  font-size: 11px;
  color: var(--text-soft);
  background: transparent;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  transition: all 0.15s;
}
.sub-tools .micro:hover { background: var(--line); color: var(--text); }
.sub-tools .micro:disabled { opacity: 0.3; cursor: not-allowed; }
.sub-tools .micro.danger { color: var(--danger); }
.sub-tools .micro.danger:hover { background: var(--danger); color: #fff; }

.add-sub-form { margin: 0; gap: 4px; }
.add-sub-form .input-xs {
  width: 80px;
  min-width: 70px;
  border-radius: 999px;
}
.add-sub-form .btn-xs { border-radius: 999px; }

.col-actions {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 8px;
}
.col-actions .inline-form { margin: 0; gap: 4px; }
.col-actions .btn-icon {
  width: 24px;
  height: 24px;
  font-size: 12px;
  border-radius: 6px;
}

/* ===== 其他 ===== */
.login-card { max-width: 420px; margin: 6vh auto 0; }
.back-link { display: inline-block; margin-top: 18px; font-size: 14px; color: var(--accent); text-decoration: none; }
.back-link:hover { text-decoration: underline; }
.foot { text-align: center; color: var(--text-soft); font-size: 13px; margin-top: 24px; }

@media (max-width: 700px) {
  .card { padding: 22px; border-radius: 18px; }
  h1 { font-size: 21px; }
  .admin-head { flex-direction: column; align-items: flex-start; }
  .cat-mgmt { padding: 18px; }
  .section-head { flex-direction: column; align-items: flex-start; gap: 12px; }
  .add-top-form { width: 100%; }
  .add-top-form .input-sm { flex: 1; width: auto; }
  .cat-list-header { display: none; }
  .cat-grid-row {
    grid-template-columns: 1fr;
    gap: 10px;
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: 14px;
    margin-bottom: 10px;
    align-items: stretch;
  }
  .cat-row:last-child { margin-bottom: 0; }
  .cat-top-tag { align-self: flex-start; }
  .col-actions { justify-content: flex-start; }
  .col-actions .btn-icon { width: 32px; height: 32px; font-size: 14px; }
}