/* ============================================================
   公共覆层样式 —— Reader / Cmd K / AI Assistant
   每个 variant 都引入这个文件；颜色用 CSS 变量，由 variant 提供
   ============================================================ */

:root {
  --ov-bg:        rgba(8,8,12,.55);
  --ov-panel:    #fff;
  --ov-text:     #111;
  --ov-muted:    rgba(0,0,0,.5);
  --ov-border:   rgba(0,0,0,.08);
  --ov-soft:     rgba(0,0,0,.04);
  --ov-accent:   #ff6e4a;
  --ov-mono:     ui-monospace, "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;
}
:root[data-theme="dark"] {
  --ov-bg:        rgba(0,0,0,.65);
  --ov-panel:    #14141a;
  --ov-text:     #f3f3f0;
  --ov-muted:    rgba(255,255,255,.55);
  --ov-border:   rgba(255,255,255,.08);
  --ov-soft:     rgba(255,255,255,.04);
}

/* —— Reader —— */
#__reader { position:fixed; inset:0; z-index:9000; opacity:0; pointer-events:none; transition: opacity .25s ease; }
#__reader.open { opacity:1; pointer-events:auto; }
#__reader .r-bg { position:absolute; inset:0; background:var(--ov-bg); backdrop-filter: blur(8px); }
#__reader .r-shell {
  position:absolute; inset:5vh 50% auto auto; transform: translateX(50%);
  width: min(760px, 92vw); max-height: 90vh; overflow:auto;
  background: var(--ov-panel); color: var(--ov-text);
  padding: 56px 56px 80px; border-radius: 8px;
  box-shadow: 0 30px 80px -20px rgba(0,0,0,.4);
  border: 1px solid var(--ov-border);
}
#__reader .r-close {
  position:sticky; top:0; float:right; transform: translate(20px,-30px);
  width:36px; height:36px; border-radius:50%; border:1px solid var(--ov-border);
  background: var(--ov-panel); color:var(--ov-text);
  font-size:20px; cursor:pointer; display:grid; place-items:center;
}
#__reader .r-meta { font-size:13px; letter-spacing:.04em; color:var(--ov-muted); margin-bottom:14px; font-family:var(--ov-mono); }
#__reader .r-title { font-size: 38px; line-height: 1.18; margin: 0 0 28px; letter-spacing: -.02em; }
#__reader .r-body { font-size: 17px; line-height: 1.72; color: var(--ov-text); }
#__reader .r-body h1 { font-size: 30px; margin: 2.4em 0 .5em; letter-spacing:-.01em; }
#__reader .r-body h2 { font-size: 22px; margin: 2.2em 0 .5em; letter-spacing:-.005em; }
#__reader .r-body h3 { font-size: 18px; margin: 1.6em 0 .4em; }
#__reader .r-body p { margin: 0 0 1.1em; }
#__reader .r-body ul, #__reader .r-body ol { margin: 0 0 1.1em 1.4em; padding:0; }
#__reader .r-body li { margin-bottom: .5em; }
#__reader .r-body blockquote { margin: 1.4em 0; padding: 8px 0 8px 18px; border-left:3px solid var(--ov-accent); color:var(--ov-muted); }
#__reader .r-body code { background: var(--ov-soft); padding: 1px 6px; border-radius: 4px; font-family: var(--ov-mono); font-size: .92em; }
#__reader .r-body pre { background: var(--ov-soft); padding: 16px; border-radius: 8px; overflow:auto; margin: 1.4em 0; }
#__reader .r-body pre code { background:none; padding:0; font-size: 13px; }
#__reader .r-body strong { font-weight: 600; }
#__reader .r-body hr { border:0; border-top:1px solid var(--ov-border); margin: 2.2em 0; }

/* —— Cmd K —— */
#__cmdk { position:fixed; inset:0; z-index:9100; opacity:0; pointer-events:none; transition: opacity .18s ease; }
#__cmdk.open { opacity:1; pointer-events:auto; }
#__cmdk .c-bg { position:absolute; inset:0; background: var(--ov-bg); backdrop-filter: blur(6px); }
#__cmdk .c-shell {
  position:absolute; left:50%; top: 14vh; transform: translateX(-50%);
  width: min(640px, 92vw);
  background: var(--ov-panel); color: var(--ov-text);
  border: 1px solid var(--ov-border);
  border-radius: 12px;
  box-shadow: 0 30px 80px -20px rgba(0,0,0,.45);
  overflow:hidden;
}
#__cmdk .c-input {
  width:100%; padding: 18px 22px; border:0; outline:0;
  background: transparent; color: inherit;
  font-size: 17px; border-bottom: 1px solid var(--ov-border);
  font-family: inherit;
}
#__cmdk .c-list { max-height: 56vh; overflow:auto; padding: 6px; }
#__cmdk .c-item {
  display:flex; align-items:center; gap:14px; padding: 10px 14px;
  border-radius: 8px; cursor:pointer;
}
#__cmdk .c-item.on { background: var(--ov-soft); }
#__cmdk .c-type {
  font-family: var(--ov-mono); font-size: 11px; letter-spacing:.06em;
  color: var(--ov-muted); min-width: 32px;
}
#__cmdk .c-label { font-size: 14px; }
#__cmdk .c-sub   { font-size: 12px; color: var(--ov-muted); margin-top: 2px;
                   white-space: nowrap; overflow:hidden; text-overflow:ellipsis; max-width: 460px; }
#__cmdk .c-foot { padding: 8px 14px; border-top:1px solid var(--ov-border);
                  font-size: 11px; color: var(--ov-muted); font-family: var(--ov-mono); }
#__cmdk kbd { background: var(--ov-soft); padding: 1px 6px; border-radius: 4px; font-family: var(--ov-mono); margin: 0 4px; }

/* —— AI Assistant —— */
#__ai { position: fixed; right: 24px; bottom: 24px; z-index: 9200; font-family: inherit; }
#__ai .ai-trigger {
  display:flex; align-items:center; gap: 8px;
  padding: 10px 16px 10px 12px; border-radius: 999px;
  background: var(--ov-panel); color: var(--ov-text);
  border: 1px solid var(--ov-border);
  box-shadow: 0 12px 30px -10px rgba(0,0,0,.25);
  cursor: pointer; font-size: 13px;
}
#__ai .ai-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: #16B57F;
  box-shadow: 0 0 0 4px rgba(22,181,127,.18);
  animation: aiPulse 1.8s ease-in-out infinite;
}
@keyframes aiPulse {
  0%,100% { box-shadow: 0 0 0 4px rgba(22,181,127,.18); }
  50%     { box-shadow: 0 0 0 8px rgba(22,181,127,.05); }
}
#__ai .ai-window {
  position:absolute; right:0; bottom: calc(100% + 12px);
  width: 360px; max-height: 540px;
  background: var(--ov-panel); color: var(--ov-text);
  border: 1px solid var(--ov-border);
  border-radius: 14px;
  box-shadow: 0 30px 80px -20px rgba(0,0,0,.4);
  display:none; flex-direction: column; overflow:hidden;
}
#__ai.open .ai-window { display:flex; }
#__ai.open .ai-trigger { display:none; }
#__ai .ai-head {
  display:flex; justify-content:space-between; align-items:flex-start;
  padding: 14px 16px; border-bottom:1px solid var(--ov-border);
}
#__ai .ai-head-title { font-size: 13px; font-weight: 600; }
#__ai .ai-head-sub   { font-size: 11px; color: var(--ov-muted); margin-top: 2px; }
#__ai .ai-close {
  width:24px; height:24px; border-radius:50%; border:0; background: var(--ov-soft);
  color: inherit; cursor:pointer; font-size: 14px; line-height:0;
}
#__ai .ai-thread {
  padding: 14px 16px; overflow-y:auto; flex:1; min-height: 120px; max-height: 320px;
  display:flex; flex-direction:column; gap: 8px;
}
#__ai .ai-msg {
  font-size: 13px; line-height: 1.6; padding: 9px 13px;
  white-space: pre-wrap; max-width: 82%; word-break: break-word;
  position: relative;
}
/* AI 回复 — 左侧，浅灰气泡 */
#__ai .ai-msg--ai {
  background: #f0f0f0;
  color: #1a1816;
  align-self: flex-start;
  border-radius: 4px 14px 14px 14px;
}
/* 暗色模式 AI 气泡 */
[data-theme="dark"] #__ai .ai-msg--ai {
  background: #2a2820;
  color: #f1ecdf;
}
/* 用户消息 — 右侧，强调色气泡 */
#__ai .ai-msg--user {
  background: var(--ov-accent);
  color: #fff;
  align-self: flex-end;
  border-radius: 14px 4px 14px 14px;
}
#__ai .ai-suggest {
  padding: 0 12px 8px; display:flex; gap:6px; flex-wrap:wrap;
}
#__ai .ai-chip {
  font-size: 11px; padding: 4px 10px; border-radius: 999px;
  background: var(--ov-soft); border:0; color: inherit; cursor:pointer;
}
#__ai .ai-chip:hover { background: var(--ov-border); }
#__ai .ai-form {
  display:flex; padding: 10px 12px; border-top:1px solid var(--ov-border); gap: 6px;
}
#__ai .ai-input {
  flex: 1; border:0; outline:0; background: transparent; color: inherit;
  font-size: 13px; padding: 6px 4px; font-family: inherit;
}
#__ai .ai-send {
  width: 28px; height: 28px; border-radius: 50%;
  background: var(--ov-text); color: var(--ov-panel);
  border: 0; cursor: pointer; font-size: 12px;
}

/* AI 回复中的链接 */
#__ai .ai-link {
  color: var(--ov-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
  word-break: break-all;
}
#__ai .ai-link:hover { opacity: .8; }

@media (max-width: 600px) {
  /* ── AI assistant: bottom sheet on mobile ── */

  /* Trigger: move closer to edge */
  #__ai { right: 16px; bottom: 20px; }

  /* Open state: #__ai expands to full-screen backdrop */
  #__ai.open {
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
    border-radius: 0;
  }

  /* Window: absolute bottom sheet inside the now-full-screen #__ai */
  #__ai .ai-window {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    width: 100%;
    max-height: 82svh;        /* svh = excludes mobile browser chrome */
    border-radius: 20px 20px 0 0;
    border-left: 0;
    border-right: 0;
    border-bottom: 0;
    /* Slide-in animation */
    animation: aiSlideUp .22s ease;
  }
  @keyframes aiSlideUp {
    from { transform: translateY(18px); opacity: 0; }
    to   { transform: translateY(0);    opacity: 1; }
  }

  /* Thread: fill remaining space flexibly */
  #__ai .ai-thread {
    max-height: none;
    flex: 1;
  }

  /* Input: 16px prevents iOS auto-zoom on focus */
  #__ai .ai-input { font-size: 16px; }

  /* Safe area padding for iPhone home indicator */
  #__ai .ai-form {
    padding-bottom: max(10px, env(safe-area-inset-bottom));
  }

  /* ── Reader ── */
  #__reader .r-shell { padding: 36px 22px 60px; }
  #__reader .r-title { font-size: 26px; }
}