:root {
  --bg: #ffffff;
  --bg-pane: #f7f9fc;
  --bg-header: #eef2f7;
  --fg: #1f2933;
  --fg-muted: #6b7280;
  --border: #d7dde5;
  --accent: #2563eb;
  --shadow: 0 1px 3px rgba(0, 0, 0, .08);
  --frame-bg: #ffffff;
  --md-link: #2563eb;
  --card: #ffffff;
  --card-fg: #0f172a;
  --btn-bg: #f1f5f9;
  --btn-fg: #0f172a;
  --badge-bg: rgba(245,158,11,.15);
  --badge-fg: #b45309;
  --accent2: #f59e0b;
  --row-hover: #f1f5f9;
  --row-sel: #fff8e6;
  --input-bg: #ffffff;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--fg);
}

/* 主布局：左右双栏 + 分隔条 */
.layout {
  display: flex;
  height: 100vh;
  overflow: hidden;
}

.pane {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
}
.pane-left {
  width: 56%;
  flex: 0 0 auto;
  border-right: none;
}
.pane-right {
  flex: 1 1 auto;
  border-right: none;
}

/* 可拖拽分隔条 */
.resizer {
  flex: 0 0 6px;
  cursor: col-resize;
  background: var(--border);
  position: relative;
  z-index: 10;
  transition: background .15s ease;
}
.resizer:hover,
.resizer.dragging {
  background: var(--accent2);
}

.pane-header {
  flex: 0 0 auto;
  padding: .65rem 1rem;
  font-weight: 600;
  font-size: .95rem;
  background: var(--bg-header);
  border-bottom: 1px solid var(--border);
  color: var(--fg-muted);
}

/* 左侧 Markdown 容器 */
.markdown-body {
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  padding: 1.5rem 1.75rem 3rem;
  background: var(--bg-pane);
  line-height: 1.7;
  font-size: .96rem;
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3 {
  margin-top: 1.6em;
  margin-bottom: .6em;
  line-height: 1.3;
}
.markdown-body h1 { font-size: 1.6rem; border-bottom: 1px solid var(--border); padding-bottom: .3em; }
.markdown-body h2 { font-size: 1.25rem; }
.markdown-body h3 { font-size: 1.08rem; }
.markdown-body p { margin: .8em 0; }
.markdown-body a { color: var(--md-link); }
.markdown-body code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  background: var(--bg-header);
  padding: .15em .35em;
  border-radius: 4px;
  font-size: .9em;
}
.markdown-body pre {
  background: var(--bg-header);
  padding: .9em 1em;
  border-radius: 6px;
  overflow: auto;
}
.markdown-body pre code { background: transparent; padding: 0; }
.markdown-body blockquote {
  margin: 1em 0;
  padding: .4em 1em;
  border-left: 4px solid var(--accent);
  background: var(--bg-header);
  border-radius: 0 6px 6px 0;
  color: var(--fg-muted);
}
.markdown-body ul, .markdown-body ol { padding-left: 1.6em; }
.markdown-body table { border-collapse: collapse; }
.markdown-body th, .markdown-body td {
  border: 1px solid var(--border);
  padding: .4em .7em;
}
.markdown-body img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  display: block;
  margin: 1em 0;
}

/* 顶部状态徽标 */
.mail-status {
  margin-left: auto;
  font-size: .8rem;
  font-weight: 500;
  color: var(--fg-muted);
  padding: .15rem .6rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg);
}

/* 右侧滚动区 */
.mail-scroll {
  flex: 1 1 auto;
  overflow: auto;
  padding: 1rem 1.25rem 2rem;
  background: var(--bg);
}

/* 卡片 */
.card {
  background: var(--card);
  color: var(--card-fg);
  border-radius: 18px;
  padding: 20px 22px;
  box-shadow: var(--shadow);
  margin-bottom: 1rem;
}
.card h3 { margin: 0 0 .6rem; font-size: 1.05rem; display: flex; align-items: center; gap: .5rem; }
.mail-card .mail-card-head {
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 8px; margin-bottom: 12px;
}
.badge {
  background: var(--badge-bg); color: var(--badge-fg);
  padding: 3px 10px; border-radius: 999px; font-size: .72rem; font-weight: 600;
}
.mi { font-style: normal; }

/* 邮箱地址展示 */
.email-display {
  background: var(--bg-pane);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
}
.email-address {
  font-family: "SFMono-Regular", Consolas, Menlo, monospace;
  font-size: 1.25rem; font-weight: 700;
  background: var(--input-bg); color: var(--card-fg);
  padding: 12px 16px; border-radius: 12px;
  border: 1px solid var(--border);
  word-break: break-all;
}
.button-group {
  display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px;
}
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 16px; border-radius: 999px;
  border: 1px solid var(--border); background: var(--btn-bg); color: var(--btn-fg);
  font-size: .88rem; font-weight: 600; cursor: pointer;
  transition: transform .12s ease, background .2s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn span { font-size: 1rem; line-height: 1; }
.btn-primary {
  background: var(--accent2); color: #0f172a; border-color: transparent;
}
.btn-primary:hover { background: #d97706; }
.btn-outline:hover { background: var(--row-hover); }
.input-group { display: flex; gap: 8px; align-items: center; flex: 1 1 220px; min-width: 200px; }
.input-custom {
  flex: 1; padding: 8px 14px; border-radius: 999px;
  border: 1px solid var(--border); background: var(--input-bg); color: var(--fg);
  font-family: inherit; font-size: .9rem;
}
.input-custom:focus { outline: none; border-color: var(--accent2); }
.email-tip {
  margin-top: 12px; font-size: .78rem; color: var(--fg-muted);
}

/* 收件箱表格 */
.card-title { margin: 0 0 12px; font-size: 1.05rem; display: flex; align-items: center; gap: .5rem; }
.inbox-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: 12px; }
.inbox-table { width: 100%; border-collapse: collapse; }
.inbox-table th, .inbox-table td {
  text-align: left; padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  font-size: .88rem; color: var(--card-fg);
}
.inbox-table th { background: var(--bg-header); font-weight: 600; color: var(--fg-muted); }
.inbox-table tr { cursor: pointer; transition: background .12s; }
.inbox-table tbody tr:hover { background: var(--row-hover); }
.inbox-table tr.selected-row { background: var(--row-sel) !important; }
.inbox-empty { text-align: center; color: var(--fg-muted); padding: 22px; }

/* 邮件详情 */
.detail-panel {
  margin-top: 16px; padding: 16px;
  background: var(--bg-pane); border: 1px solid var(--border);
  border-radius: 14px; color: var(--card-fg);
}
.detail-panel h4 { margin: 0 0 10px; font-size: .95rem; display: flex; align-items: center; gap: .4rem; color: var(--accent2); }
.d-row { display: flex; gap: 10px; font-size: .85rem; padding: 4px 0; color: var(--fg-muted); }
.d-row b { color: var(--card-fg); font-weight: 600; }
.d-body {
  margin-top: 12px; padding-top: 12px;
  border-top: 1px solid var(--border);
  font-size: .9rem; line-height: 1.6; overflow: auto;
  max-height: 50vh;
}

/* 内联广告卡 */
.ad-card {
  text-align: center;
}
.ad-card .ad-card-title {
  margin: 0 0 12px;
  font-size: 1.1rem; font-weight: 800; color: var(--card-fg);
  display: flex; align-items: center; justify-content: center; gap: 8px;
}
.ad-card .ad-features { text-align: left; margin: 0 0 8px; }
.ad-card .ad-divider { margin: 12px 0; }
.ad-card .ad-images { margin-top: 12px; }

/* 弹出广告 */
.ad-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,.55);
  display: flex; align-items: center; justify-content: center;
  z-index: 10000;
  opacity: 1;
  transition: opacity .3s ease;
}
.ad-overlay.hidden {
  opacity: 0;
  pointer-events: none;
}
.ad-modal {
  position: relative;
  background: #ffffff;
  border-radius: 20px;
  box-shadow: 0 24px 60px rgba(0,0,0,.3);
  max-width: 520px;
  width: 90%;
  max-height: 86vh;
  overflow-y: auto;
  padding: 32px 36px 28px;
  animation: adPop .35s ease;
}
@keyframes adPop {
  from { transform: scale(.9); opacity: 0; }
  to   { transform: scale(1);  opacity: 1; }
}
.ad-close {
  position: absolute; top: 10px; right: 14px;
  font-size: 1.8rem; line-height: 1; color: #94a3b8;
  background: none; border: none; cursor: pointer; padding: 4px 8px;
  border-radius: 8px; transition: color .15s, background .15s;
}
.ad-close:hover { color: #1f2933; background: #f1f5f9; }
.ad-content h2 {
  margin: 0 0 14px;
  font-size: 1.25rem;
  font-weight: 800;
  color: #0f172a;
  display: flex; align-items: center; gap: 8px;
}
.ad-badge {
  background: #6366f1; color: #fff;
  font-size: .65rem; font-weight: 700;
  padding: 2px 8px; border-radius: 6px;
}
.ad-sub-title {
  margin: 0 0 8px;
  font-size: 1.05rem; font-weight: 700; color: #0f172a;
}
.ad-features { margin: 0 0 12px; }
.ad-features p {
  margin: 6px 0;
  font-size: .92rem; color: #334155;
  line-height: 1.6;
}
.ad-divider {
  border: none; border-top: 1px dashed #cbd5e1;
  margin: 14px 0;
}
.ad-images {
  display: flex; flex-direction: column; align-items: center; gap: 12px;
  margin-top: 14px;
}
.ad-images img {
  max-width: 100%; border-radius: 12px; display: block;
}
.ad-images .ad-qr {
  max-width: 480px; width: 100%; border: 1px solid #e2e8f0;
}

/* Toast */
.mail-toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
  background: var(--accent2); color: #0f172a;
  padding: 10px 22px; border-radius: 999px;
  font-weight: 700; font-size: .9rem; z-index: 9999;
  box-shadow: 0 8px 20px rgba(0,0,0,.25);
}

/* 移动端：堆叠 */
@media (max-width: 860px) {
  .layout {
    flex-direction: column;
    height: auto;
    min-height: 100vh;
  }
  .pane-left {
    width: 100%;
    flex: 0 0 40vh;
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
  .pane-right {
    flex: 1 1 auto;
    border-bottom: none;
  }
  .resizer { display: none; }
}