:root {
  --fg: #1a1f24;
  --muted: #6b7480;
  --line: #e4e8ec;
  --accent: #0b6bcb;
  --zh-bg: #f4f7f5;
  --zh-border: #7aa88f;
  --card-bg: #fff;
  --bg: #fafbfc;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  color: var(--fg);
  background: var(--bg);
  font: 16px/1.7 -apple-system, "PingFang SC", "Helvetica Neue", sans-serif;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

nav {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; gap: 18px;
  padding: 10px 24px;
  background: #fff; border-bottom: 1px solid var(--line);
}
nav .brand { font-weight: 700; color: var(--fg); }
nav #refresh-btn { margin-left: auto; }
.logout-form { display: inline; }
.logout-form button { color: var(--muted); border: none; }

.login-box {
  max-width: 320px; margin: 18vh auto; padding: 32px;
  background: #fff; border: 1px solid var(--line); border-radius: 12px;
  display: flex; flex-direction: column; gap: 10px; text-align: center;
}
.login-box form { display: flex; flex-direction: column; gap: 10px; }
.login-box input {
  font: inherit; padding: 9px 12px;
  border: 1px solid var(--line); border-radius: 8px;
}
.login-box button { padding: 9px; background: var(--fg); color: #fff; border: none; }
.login-box .err { color: #c33; font-size: 14px; margin: 0; }

main { max-width: 780px; margin: 0 auto; padding: 24px 20px 80px; }

h1 { font-size: 22px; margin: 28px 0 12px; }
h2 { font-size: 17px; margin: 0 0 10px; }
.sub { font-size: 13px; color: var(--muted); font-weight: 400; margin-left: 8px; }
.meta { font-size: 13px; color: var(--muted); }
.empty { color: var(--muted); }

button {
  font: inherit; font-size: 14px;
  padding: 4px 12px; border: 1px solid var(--line); border-radius: 6px;
  background: #fff; cursor: pointer;
}
button:hover { border-color: var(--accent); color: var(--accent); }
button:disabled { opacity: 0.5; cursor: wait; }
button.mini { padding: 0 6px; font-size: 12px; color: var(--muted); }

/* index */
.chips { display: flex; gap: 8px; margin: 4px 0 12px; flex-wrap: wrap; }
.chip {
  padding: 2px 14px; border-radius: 14px; font-size: 13px;
  border: 1px solid var(--line); background: #fff; color: var(--muted);
}
.chip.active { background: var(--fg); color: #fff; border-color: var(--fg); }
.cat {
  font-size: 11px; padding: 0 7px; border-radius: 9px; margin-right: 6px;
  background: #eef1f4; color: #57606a; vertical-align: 1px;
}
.cat-AI { background: #ede7fb; color: #6a4fc3; }
.cat-工程 { background: #e2f0fb; color: #2570a8; }
.cat-商业 { background: #fdeee0; color: #b3661a; }
.cat-科学 { background: #e3f4e8; color: #2c8a4b; }
.brief { font-size: 14px; color: #57606a; margin-top: 2px; }
.stars { color: #e8a516; font-size: 12px; letter-spacing: 1px; margin-right: 4px; }
.spacer { margin-left: auto; }
.chip.sort.active { background: var(--accent); border-color: var(--accent); color: #fff; }
.pager { display: flex; gap: 16px; justify-content: center; margin: 20px 0; }

ul.daily { list-style: none; padding: 0; }
ul.daily li { padding: 9px 0; border-bottom: 1px solid var(--line); }
ul.daily li a { font-size: 16px; }
ul.daily li .meta { margin-left: 10px; }
.read > a, .read .card-title { color: #8899aa; }

.cards { display: flex; flex-direction: column; gap: 14px; }
.card {
  background: var(--card-bg); border: 1px solid var(--line);
  border-radius: 10px; padding: 14px 18px;
}
.card-title { font-size: 16px; font-weight: 600; }
.bullets { margin: 8px 0 0; padding-left: 20px; }
.bullets li { margin: 3px 0; }
.pending { color: var(--muted); font-size: 13px; margin-top: 6px; }

/* article — 商业级阅读排版 */
article { max-width: 700px; margin: 0 auto; }
.art-title {
  font: 700 30px/1.35 Georgia, "Noto Serif SC", "Songti SC", serif;
  margin: 20px 0 8px; letter-spacing: -0.01em;
}
.art-title a { color: var(--fg); }
.art-title a:hover { text-decoration: none; color: var(--accent); }
article > .meta {
  font-size: 13px; color: var(--muted);
  padding-bottom: 14px; border-bottom: 1px solid var(--line);
}
.controls { margin: 14px 0; display: flex; gap: 10px; }
.summary ul {
  background: #fffdf4; border: 1px solid #f0e4b8; border-radius: 10px;
  padding: 14px 16px 14px 34px; margin: 12px 0;
  font-size: 15px; line-height: 1.8;
}
.summary li { margin: 4px 0; }

#content {
  font: 17px/1.9 Georgia, Charter, "Songti SC", serif;
  color: #22272c;
}
#content .blk { margin: 20px 0; }
#content h2.blk {
  font-size: 22px; line-height: 1.4; margin: 36px 0 14px;
  letter-spacing: -0.01em;
}
#content h3.blk { font-size: 19px; line-height: 1.45; margin: 30px 0 12px; }
#content ul.blk, #content ol.blk { padding-left: 26px; }
#content li.unit { margin: 8px 0; }
#content blockquote.blk {
  margin: 20px 0; padding: 4px 18px;
  border-left: 3px solid #d0d7de; color: #57606a;
}
#content pre.blk {
  background: #f6f8fa; border: 1px solid var(--line); border-radius: 8px;
  padding: 12px 14px; overflow-x: auto;
  font-size: 14px; line-height: 1.6;
}
#content pre.blk code { font-family: ui-monospace, "SF Mono", Menlo, monospace; }
#content .unit > code, #content .sen code {
  background: #f0f2f4; border-radius: 3px; padding: 0 4px;
  font-size: 0.88em; font-family: ui-monospace, "SF Mono", Menlo, monospace;
}
#content figure.blk { margin: 24px 0; text-align: center; }
#content figure.blk img { max-width: 100%; border-radius: 6px; }
#content .sen { display: inline; }
#content .zh {
  color: #23705a;
  font-family: "PingFang SC", "Hiragino Sans GB", sans-serif;
  font-size: 0.94em;
}
#content h2 .zh, #content h3 .zh { color: #23705a; }
#content.mode-en .zh { display: none; }
#content.mode-zh .en { display: none; }
mark { background: #ffe9a8; padding: 0 1px; border-radius: 2px; }

#hl-pop {
  position: absolute; z-index: 20;
}
#hl-pop button { box-shadow: 0 2px 8px rgba(0,0,0,.15); background: #fff; }

.panel {
  margin-top: 32px; padding: 16px 18px;
  background: var(--card-bg); border: 1px solid var(--line); border-radius: 10px;
}
#hl-list, .hl-page, .mem-list { list-style: none; padding: 0; margin: 0; }
#hl-list li, .hl-page li, .mem-list li {
  padding: 8px 0; border-bottom: 1px dashed var(--line);
}
.hl-text { color: #7a5b00; }
.hl-note { display: block; color: var(--muted); font-size: 14px; }

/* chat */
#chat-log { display: flex; flex-direction: column; gap: 10px; margin-bottom: 12px; }
.bubble {
  max-width: 92%; padding: 8px 12px; border-radius: 10px;
  white-space: pre-wrap; word-break: break-word;
}
.bubble.user { align-self: flex-end; background: #e3f0ff; }
.bubble.assistant { align-self: flex-start; background: #f2f4f6; white-space: normal; }
.bubble.assistant p { margin: 6px 0; }
.bubble.assistant ul { margin: 6px 0; padding-left: 20px; }
.bubble.assistant h4 { margin: 10px 0 4px; font-size: 15px; }
.bubble.assistant pre {
  background: #eceff1; border-radius: 6px; padding: 8px 10px;
  overflow-x: auto; font-size: 13px;
}
.bubble.assistant code { background: #eceff1; border-radius: 3px; padding: 0 3px; }
.bubble.assistant pre code { background: none; padding: 0; }
.chat-input { display: flex; gap: 8px; align-items: flex-start; margin: 10px 0; }
.chat-input textarea, .chat-input input, .chat-input select {
  flex: 1; font: inherit; padding: 8px 10px;
  border: 1px solid var(--line); border-radius: 8px;
}
.chat-btns { display: flex; flex-direction: column; gap: 6px; }

/* feeds */
table.feeds { width: 100%; border-collapse: collapse; font-size: 14px; }
table.feeds th, table.feeds td {
  text-align: left; padding: 6px 8px; border-bottom: 1px solid var(--line);
}
.tier { font-size: 12px; padding: 1px 8px; border-radius: 10px; }
.tier-daily { background: #ffe4e1; color: #a33; }
.tier-weekly { background: #e8ecff; color: #46a; }
.tier-summary { background: #e8f2ea; color: #2a6; }
.err { color: #c33; font-size: 12px; max-width: 200px; }

/* archive — Feedly 式双栏 */
.archive-layout {
  display: grid; grid-template-columns: 230px 1fr; gap: 28px;
  max-width: 1080px; margin: 0 auto;
}
main:has(.archive-layout) { max-width: 1120px; }
.feed-nav {
  position: sticky; top: 60px; align-self: start;
  max-height: calc(100vh - 80px); overflow-y: auto;
  display: flex; flex-direction: column; gap: 1px; padding-right: 6px;
}
.feed-link {
  display: flex; justify-content: space-between; gap: 8px;
  padding: 6px 10px; border-radius: 7px;
  color: var(--fg); font-size: 13.5px; line-height: 1.4;
}
.feed-link:hover { background: #eef1f4; text-decoration: none; }
.feed-link.active { background: var(--fg); color: #fff; }
.feed-link .count { color: var(--muted); font-size: 12px; }
.feed-link.active .count { color: #cbd3da; }
.archive-search { display: flex; gap: 8px; align-items: center; margin-bottom: 14px; }
.archive-search input[name=q] {
  flex: 1; font: inherit; padding: 7px 12px;
  border: 1px solid var(--line); border-radius: 8px;
}
.entry {
  display: flex; gap: 16px; align-items: flex-start;
  padding: 13px 10px; border-bottom: 1px solid var(--line);
  color: var(--fg); border-radius: 6px;
}
.entry:hover { background: #f2f5f8; text-decoration: none; }
.entry-body { flex: 1; min-width: 0; }
.entry-title { font-weight: 600; font-size: 15.5px; line-height: 1.45; }
.entry.read .entry-title { color: #8899aa; font-weight: 400; }
.entry-snippet {
  font-size: 13.5px; color: var(--muted); margin: 3px 0;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
  overflow: hidden;
}
.entry-thumb {
  width: 96px; height: 68px; object-fit: cover;
  border-radius: 8px; flex-shrink: 0; background: #eef1f4;
}

/* mobile */
@media (max-width: 640px) {
  nav { gap: 12px; padding: 10px 14px; overflow-x: auto; }
  nav a, nav button, nav form { flex-shrink: 0; }
  main { padding: 16px 14px 60px; }
  h1 { font-size: 19px; }
  .sub { display: block; margin-left: 0; }
  .art-title { font-size: 23px; }
  #content { font-size: 16px; }
  .chips { overflow-x: auto; flex-wrap: nowrap; padding-bottom: 4px; }
  .chip { flex-shrink: 0; }
  ul.daily li .meta { display: block; margin-left: 0; }
  .chat-input { flex-direction: column; align-items: stretch; }
  .chat-btns { flex-direction: row; }
  .bubble { max-width: 100%; }
  table.feeds { display: block; overflow-x: auto; }
  .card { padding: 12px 14px; }
  .archive-layout { grid-template-columns: 1fr; }
  .feed-nav {
    position: static; max-height: none; flex-direction: row;
    overflow-x: auto; gap: 6px; padding-bottom: 6px;
  }
  .feed-link { flex-shrink: 0; border: 1px solid var(--line); }
  .entry-thumb { width: 72px; height: 54px; }
}