/* ============================================================
   管理后台样式 — 三栏布局 + 移动端 Tab 切换
   ============================================================ */
:root {
  --bg: #f9f8f6;
  --surface: #fff;
  --text: #1a1a1a;
  --text2: #555;
  --muted: #999;
  --accent: #d97706;
  --danger: #dc2626;
  --border: #e5e4e1;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(0,0,0,.06);
  --font-ui: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
}

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

body {
  font-family: var(--font-ui);
  font-size: 14px;
  color: var(--text);
  background: var(--bg);
  height: 100vh;
  overflow: hidden;
}

/* ---- Top Bar ---- */
.topbar {
  height: 50px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  z-index: 10;
}
.topbar-brand { font-weight: 700; font-size: 15px; display: flex; align-items: center; gap: 8px; }
.topbar-brand img { width: 24px; height: 24px; border-radius: 4px; }
.topbar-actions { display: flex; gap: 8px; align-items: center; }

/* ---- Layout ---- */
.layout {
  display: flex;
  height: calc(100vh - 50px);
}
.panel-left { width: 220px; border-right: 1px solid var(--border); background: var(--surface); overflow-y: auto; flex-shrink: 0; }
.panel-center { flex: 1; overflow-y: auto; background: #fff; }
.panel-right { width: 280px; border-left: 1px solid var(--border); background: var(--surface); overflow-y: auto; flex-shrink: 0; }

/* ---- Panel Left: Pages + Blocks ---- */
.panel-left { padding: 12px; }
.panel-left h3 {
  font-size: 11px; text-transform: uppercase; letter-spacing: 1px;
  color: var(--muted); margin: 16px 0 8px; padding: 0 4px;
}
.panel-left h3:first-child { margin-top: 0; }

.page-item {
  display: flex; align-items: center; justify-content: space-between;
  padding: 8px 10px; border-radius: 6px; cursor: pointer;
  margin-bottom: 2px; font-size: 13px; transition: all .15s;
  color: var(--text2);
}
.page-item:hover { background: var(--bg); }
.page-item.active { background: var(--accent); color: #fff; font-weight: 600; }
.page-item .del-btn {
  opacity: 0; background: none; border: none; color: #fff; cursor: pointer;
  font-size: 16px; line-height: 1; padding: 0 4px;
}
.page-item.active .del-btn { opacity: .7; }
.page-item.active .del-btn:hover { opacity: 1; }
.page-item .badge { font-size: 10px; margin-left: 6px; opacity: .5; }

.add-page-btn {
  display: block; width: 100%; padding: 8px; margin-top: 6px;
  border: 1.5px dashed var(--border); border-radius: 6px;
  background: none; color: var(--muted); font-size: 12px;
  cursor: pointer; font-family: var(--font-ui); transition: all .15s;
}
.add-page-btn:hover { border-color: var(--accent); color: var(--accent); }

/* Block list (in left panel) */
.block-item {
  display: flex; align-items: center; gap: 8px;
  padding: 7px 10px; border-radius: 6px; cursor: pointer;
  margin-bottom: 2px; font-size: 12px; transition: all .15s;
  color: var(--text2); border: 1px solid transparent;
}
.block-item:hover { background: var(--bg); }
.block-item.active { border-color: var(--accent); background: rgba(217,119,6,.05); }
.block-item .type-icon { width: 20px; text-align: center; font-size: 13px; }
.block-item .block-type { color: var(--muted); font-size: 11px; }
.block-item .sort-btns { margin-left: auto; display: flex; gap: 2px; }
.block-item .sort-btns button {
  background: none; border: none; cursor: pointer; font-size: 14px;
  color: var(--muted); padding: 0 3px; line-height: 1;
}
.block-item .sort-btns button:hover { color: var(--accent); }

.add-block-bar {
  display: flex; gap: 6px; flex-wrap: wrap; padding: 8px 0;
}
.add-block-bar button {
  padding: 5px 10px; border: 1px solid var(--border); border-radius: 4px;
  background: var(--surface); cursor: pointer; font-size: 11px;
  font-family: var(--font-ui); color: var(--text2); transition: all .15s;
}
.add-block-bar button:hover { border-color: var(--accent); color: var(--accent); }

/* ---- Panel Center: Preview ---- */
.panel-center { padding: 24px; }

.preview-frame {
  max-width: 860px; margin: 0 auto;
  border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow); min-height: 400px;
  padding: 32px 28px; background: #fff;
}
.preview-frame .block-highlight {
  outline: 2px dashed transparent; padding: 4px 0; cursor: pointer;
  transition: outline .15s;
}
.preview-frame .block-highlight:hover { outline-color: #fbbf24; }
.preview-frame .block-highlight.selected { outline-color: var(--accent); outline-style: solid; }

/* ---- Panel Right: Properties ---- */
.panel-right { padding: 16px; }
.panel-right h3 {
  font-size: 11px; text-transform: uppercase; letter-spacing: 1px;
  color: var(--muted); margin-bottom: 12px;
}

.prop-group { margin-bottom: 14px; }
.prop-group label {
  display: block; font-size: 11px; font-weight: 600; color: var(--muted);
  margin-bottom: 4px; text-transform: uppercase; letter-spacing: .5px;
}
.prop-group input,
.prop-group select,
.prop-group textarea {
  width: 100%; padding: 8px 10px; border: 1.5px solid var(--border);
  border-radius: 6px; font-size: 13px; font-family: var(--font-ui);
  transition: border-color .15s; outline: none;
}
.prop-group input:focus,
.prop-group select:focus,
.prop-group textarea:focus { border-color: var(--accent); }
.prop-group textarea { min-height: 80px; resize: vertical; }

.prop-actions { margin-top: 20px; display: flex; gap: 8px; }

/* ---- Buttons ---- */
.btn {
  padding: 8px 16px; border: none; border-radius: 6px; cursor: pointer;
  font-size: 13px; font-family: var(--font-ui); font-weight: 600;
  transition: all .15s; display: inline-flex; align-items: center; gap: 4px;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { opacity: .9; }
.btn-outline { background: transparent; border: 1.5px solid var(--border); color: var(--text2); }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); }
.btn-danger { background: transparent; border: 1.5px solid var(--border); color: var(--danger); }
.btn-danger:hover { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn-sm { padding: 4px 10px; font-size: 11px; }

/* ---- Toast ---- */
.toast {
  position: fixed; top: 60px; left: 50%; transform: translateX(-50%) translateY(-120px);
  padding: 10px 22px; border-radius: 8px; color: #fff; font-size: 13px;
  z-index: 9999; transition: transform .3s; box-shadow: 0 4px 12px rgba(0,0,0,.15);
}
.toast.show { transform: translateX(-50%) translateY(0); }
.toast.success { background: #4c7a5b; }
.toast.error { background: #c0392b; }
.toast.info { background: #5c5348; }

/* ---- Login ---- */
.login-page {
  display: flex; align-items: center; justify-content: center;
  height: 100vh; background: var(--bg);
}
.login-box {
  background: var(--surface); padding: 40px 32px; border-radius: var(--radius);
  box-shadow: var(--shadow); text-align: center; width: 340px;
  border: 1px solid var(--border);
}
.login-box h2 { margin-bottom: 20px; font-size: 20px; }
.login-box input {
  width: 100%; padding: 10px; border: 1.5px solid var(--border);
  border-radius: 6px; font-size: 15px; font-family: var(--font-ui);
  outline: none; margin-bottom: 12px;
}
.login-box input:focus { border-color: var(--accent); }
.login-box .btn { width: 100%; justify-content: center; }

/* ---- Mobile ---- */
.mobile-tabs { display: none; }

@media (max-width: 860px) {
  .layout { flex-direction: column; }
  .panel-left, .panel-center, .panel-right {
    width: 100%; flex: none;
  }
  .panel-left, .panel-right { height: auto; max-height: 50vh; }
  .panel-center { min-height: 300px; }

  .mobile-tabs {
    display: flex; border-bottom: 1px solid var(--border);
    background: var(--surface);
  }
  .mobile-tabs button {
    flex: 1; padding: 12px; border: none; background: none;
    font-family: var(--font-ui); font-size: 13px; font-weight: 600;
    color: var(--muted); cursor: pointer; border-bottom: 2px solid transparent;
  }
  .mobile-tabs button.active { color: var(--accent); border-bottom-color: var(--accent); }

  .panel-left, .panel-right { display: none; }
  .panel-left.show, .panel-right.show { display: block; }
  .panel-center { display: none; }
  .panel-center.show { display: block; }
}