/* Zen-RAG 禅意视觉规范（NFR 4.1）：宣纸色 / 水墨留白 / 衬线碑刻感 / 繁体优先。
   配色严守 PRD：主色宣纸 #F4F1EA、文字深墨 #2C3E50，点缀仅极淡苔绿 / 檀木啡。 */
:root {
  --paper: #F4F1EA;          /* 宣纸 */
  --paper-raise: #FBF9F4;    /* 抬升面（卡片/气泡） */
  --concrete: #EAEAEA;       /* 清水混凝土灰 */
  --ink: #2C3E50;            /* 远山黛 / 深墨 */
  --ink-soft: #5B6B78;       /* 次级文字 */
  --ink-faint: #8A959D;      /* 弱文字 */
  --moss: #7C8A6B;           /* 极淡苔绿（点缀） */
  --moss-bg: #ECEFE5;
  --sandal: #9B8467;         /* 檀木啡（点缀） */
  --sandal-bg: #EFE8DD;
  --line: #DED8CB;           /* 分隔线（淡墨） */
  --shadow: 0 1px 2px rgba(44, 62, 80, .06), 0 8px 24px rgba(44, 62, 80, .06);
  --radius: 12px;
  --serif: "Songti SC", "Songti TC", "STSong", "宋体-简", "中易宋体", "SimSun",
           "Source Han Serif SC", "Noto Serif CJK SC", "Noto Serif TC", serif;
  --maxw: 820px;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--serif);
  color: var(--ink);
  background: var(--paper);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: .01em;
  overscroll-behavior: none;
}
h1, h2, h3 { font-weight: 600; letter-spacing: .04em; }
button { font-family: inherit; cursor: pointer; }
::selection { background: var(--sandal-bg); }

/* ---------- 三栏布局（FR-5.1）---------- */
.layout {
  display: grid;
  grid-template-columns: 272px minmax(0, 1fr) 348px;
  height: 100dvh;
  height: 100vh;
}
.col { min-width: 0; height: 100dvh; height: 100vh; overflow: hidden; display: flex; flex-direction: column; }
.col-left { background: var(--paper); border-right: 1px solid var(--line); }
.col-center { background: var(--paper); position: relative; }
.col-right { background: var(--paper-raise); border-left: 1px solid var(--line); }

/* ---------- 左栏 ---------- */
.brand { display: flex; align-items: center; gap: 12px; padding: 20px 18px 12px; }
.brand-seal {
  width: 40px; height: 40px; flex: none; display: grid; place-items: center;
  background: var(--ink); color: var(--paper); border-radius: 8px;
  font-size: 22px; font-weight: 600;
}
.brand-text { display: flex; flex-direction: column; line-height: 1.3; }
.brand-text strong { font-size: 17px; letter-spacing: .08em; }
.brand-text small { color: var(--ink-faint); font-size: 12px; letter-spacing: .14em; }

.btn-new {
  margin: 4px 14px 10px; padding: 10px 14px; border: 1px solid var(--line);
  background: var(--paper-raise); color: var(--ink); border-radius: 10px;
  font-size: 15px; letter-spacing: .08em; transition: background .15s, border-color .15s;
}
.btn-new:hover { background: var(--moss-bg); border-color: var(--moss); }

.school-badge {
  margin: 0 14px 8px; padding: 6px 12px; font-size: 12.5px; color: var(--moss);
  background: var(--moss-bg); border-radius: 999px; align-self: flex-start; letter-spacing: .06em;
}

.session-list { flex: 1; overflow-y: auto; padding: 4px 8px 12px; }
.session-item {
  display: block; width: 100%; text-align: left; border: 0; background: transparent;
  color: var(--ink); padding: 10px 12px; border-radius: 8px; margin-bottom: 2px;
  font-size: 14px; line-height: 1.5; transition: background .12s;
}
.session-item:hover { background: var(--concrete); }
.session-item.active { background: var(--sandal-bg); }
.session-item .s-title { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.session-item .s-meta { display: block; color: var(--ink-faint); font-size: 11.5px; margin-top: 2px; }
.session-empty { color: var(--ink-faint); font-size: 13px; padding: 12px; }

.sidebar-foot {
  border-top: 1px solid var(--line); padding: 10px 16px;
  display: flex; justify-content: space-between; align-items: center; gap: 8px;
}
.corpus-stats { color: var(--ink-faint); font-size: 11.5px; letter-spacing: .03em; }
.llm-badge { display: none; color: var(--moss); font-size: 11px; }

/* ---------- 中栏顶栏 ---------- */
.topbar {
  display: flex; align-items: center; gap: 10px; padding: 12px 18px;
  border-bottom: 1px solid var(--line); background: rgba(244, 241, 234, .9);
  backdrop-filter: blur(6px); padding-top: max(12px, env(safe-area-inset-top));
}
.topbar-title { font-size: 16px; margin: 0; flex: 1; letter-spacing: .1em; color: var(--ink); }
.topbar-actions { display: flex; align-items: center; gap: 8px; }
.pill {
  border: 1px solid var(--line); background: var(--paper-raise); color: var(--ink);
  border-radius: 999px; width: 34px; height: 30px; font-size: 14px; letter-spacing: 0;
}
.pill:hover { border-color: var(--sandal); }
.icon-btn {
  border: 0; background: transparent; color: var(--ink-soft); font-size: 19px;
  width: 38px; height: 38px; border-radius: 9px; display: grid; place-items: center;
}
.icon-btn:hover { background: var(--concrete); color: var(--ink); }

/* ---------- 对话流 ---------- */
.messages { flex: 1; overflow-y: auto; padding: 24px 18px 8px; scroll-behavior: smooth; }
.thread { max-width: var(--maxw); margin: 0 auto; }
.turn { margin-bottom: 22px; display: flex; flex-direction: column; }
.turn.user { align-items: flex-end; }
.bubble {
  position: relative; max-width: 92%; padding: 13px 16px; border-radius: var(--radius);
  white-space: pre-wrap; word-break: break-word; box-shadow: var(--shadow);
  -webkit-user-select: text; user-select: text;
}
.turn.user .bubble { background: var(--ink); color: var(--paper); border-bottom-right-radius: 4px; }
.turn.assistant .bubble { background: var(--paper-raise); border: 1px solid var(--line); border-bottom-left-radius: 4px; }
.bubble.streaming::after {
  content: "▍"; color: var(--moss); animation: blink 1s steps(2) infinite; margin-left: 1px;
}
@keyframes blink { 50% { opacity: 0; } }

.bubble .cite-block {
  margin-top: 10px; padding-top: 8px; border-top: 1px dashed var(--line);
  font-size: 13px; color: var(--ink-soft);
}
/* 查询关键词高亮：加粗 + 浅底 */
.bubble .kw, .ref-card .kw, .rc-text .kw {
  font-weight: 700; color: var(--ink);
  background: var(--sandal-bg); border-radius: 3px; padding: 0 2px;
}
.src-chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.src-chip {
  font-size: 12px; padding: 3px 9px; border-radius: 999px; border: 1px solid var(--sandal);
  background: var(--sandal-bg); color: var(--sandal); letter-spacing: .03em;
}
.src-chip:hover { background: var(--sandal); color: var(--paper-raise); }

.ungrounded {
  color: var(--ink-soft); font-style: normal;
  background: var(--concrete); border: 1px dashed var(--ink-faint) !important;
}
.bubble-actions { display: flex; gap: 8px; margin-top: 6px; }
.mini-btn {
  border: 1px solid var(--line); background: transparent; color: var(--ink-soft);
  border-radius: 8px; padding: 3px 10px; font-size: 12.5px;
}
.mini-btn:hover { background: var(--concrete); color: var(--ink); }

.empty-hero { max-width: var(--maxw); margin: 8vh auto 0; text-align: center; color: var(--ink-faint); }
.empty-hero .seal { font-size: 56px; color: var(--line); }
.empty-hero h2 { color: var(--ink-soft); font-weight: 500; letter-spacing: .12em; margin: 10px 0 6px; }
.empty-hero .examples { display: flex; flex-direction: column; gap: 8px; max-width: 460px; margin: 22px auto 0; }
.empty-hero .ex {
  border: 1px solid var(--line); background: var(--paper-raise); border-radius: 10px;
  padding: 10px 14px; color: var(--ink-soft); font-size: 14px; text-align: left;
}
.empty-hero .ex:hover { border-color: var(--moss); color: var(--ink); }

/* ---------- 输入区 ---------- */
.net-banner {
  max-width: var(--maxw); margin: 0 auto; padding: 8px 14px; border-radius: 8px;
  font-size: 13px; color: var(--sandal); background: var(--sandal-bg); text-align: center;
}
.composer {
  display: flex; align-items: flex-end; gap: 8px; max-width: var(--maxw);
  margin: 6px auto 0; width: 100%; padding: 10px 18px max(14px, env(safe-area-inset-bottom));
  border-top: 1px solid var(--line); background: var(--paper);
}
.input {
  flex: 1; resize: none; max-height: 160px; padding: 11px 14px; font-size: 16px;
  line-height: 1.6; color: var(--ink); background: var(--paper-raise);
  border: 1px solid var(--line); border-radius: 12px; font-family: var(--serif);
}
.input:focus { outline: none; border-color: var(--moss); box-shadow: 0 0 0 3px var(--moss-bg); }
.btn-send {
  flex: none; width: 46px; height: 46px; border-radius: 12px; border: 0;
  background: var(--ink); color: var(--paper); font-size: 17px; letter-spacing: .1em;
  transition: opacity .15s;
}
.btn-send:disabled { opacity: .4; }
.icon-btn.voice { flex: none; border: 1px solid var(--line); background: var(--paper-raise); }
.icon-btn.voice.recording { background: var(--sandal); color: var(--paper-raise); border-color: var(--sandal); }
.voice-hint {
  position: absolute; bottom: 86px; left: 50%; transform: translateX(-50%);
  background: var(--ink); color: var(--paper); padding: 8px 16px; border-radius: 999px;
  font-size: 13px; letter-spacing: .06em;
}

/* ---------- 右栏 经卷对照 ---------- */
.refs-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 18px; border-bottom: 1px solid var(--line);
}
.refs-head h2 { font-size: 15px; margin: 0; letter-spacing: .12em; color: var(--ink); }
.refs-list { flex: 1; overflow-y: auto; padding: 14px 16px 24px; }
.refs-empty { color: var(--ink-faint); font-size: 13.5px; line-height: 1.9; padding: 8px 4px; }
.ref-card {
  border: 1px solid var(--line); border-radius: 10px; background: var(--paper);
  padding: 12px 14px; margin-bottom: 12px; transition: border-color .15s, box-shadow .15s;
}
.ref-card.focus { border-color: var(--sandal); box-shadow: 0 0 0 2px var(--sandal-bg); }
.ref-card .rc-head { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; }
.ref-card .rc-idx {
  flex: none; width: 22px; height: 22px; border-radius: 6px; background: var(--ink);
  color: var(--paper); font-size: 12px; display: grid; place-items: center;
}
.ref-card .rc-cite { font-size: 13.5px; color: var(--ink); font-weight: 600; letter-spacing: .03em; flex: 1; }
.ref-card .rc-ref { font-size: 11px; color: var(--ink-faint); margin-top: 2px; }
.ref-card .rc-text { font-size: 13.5px; color: var(--ink-soft); line-height: 1.95; margin-top: 8px; }
.ref-card .rc-score { height: 3px; background: var(--concrete); border-radius: 2px; margin-top: 10px; overflow: hidden; }
.ref-card .rc-score i { display: block; height: 100%; background: var(--moss); }

/* ---------- 长按菜单 / toast ---------- */
.ctx-menu {
  position: fixed; z-index: 60; background: var(--paper-raise); border: 1px solid var(--line);
  border-radius: 10px; box-shadow: var(--shadow); overflow: hidden; min-width: 150px;
}
.ctx-menu button {
  display: block; width: 100%; text-align: left; border: 0; background: transparent;
  padding: 11px 16px; font-size: 14px; color: var(--ink);
}
.ctx-menu button:hover { background: var(--concrete); }
.toast {
  position: fixed; left: 50%; bottom: 64px; transform: translateX(-50%);
  background: var(--ink); color: var(--paper); padding: 9px 18px; border-radius: 999px;
  font-size: 13.5px; z-index: 80; box-shadow: var(--shadow); letter-spacing: .04em;
}

/* ---------- 移动端抽屉遮罩 ---------- */
.scrim { position: fixed; inset: 0; background: rgba(44, 62, 80, .28); z-index: 40; }
.only-mobile { display: none !important; }

/* 载入前隐藏，避免无样式闪烁 */
body[data-loading="1"] .messages { opacity: 0; }

/* ---------- 响应式：H5 移动端（FR-3.1）---------- */
@media (max-width: 860px) {
  .layout { grid-template-columns: 1fr; }
  .only-mobile { display: grid !important; }

  .col-left, .col-right {
    position: fixed; top: 0; bottom: 0; width: min(84vw, 320px); z-index: 50;
    transition: transform .26s cubic-bezier(.4, 0, .2, 1); will-change: transform;
  }
  .col-left { left: 0; transform: translateX(-101%); box-shadow: var(--shadow); }
  .col-right { right: 0; width: min(90vw, 360px); transform: translateX(101%); box-shadow: var(--shadow); }
  body.drawer-open .col-left { transform: translateX(0); }
  body.refs-open .col-right { transform: translateX(0); }
  body:not(.drawer-open):not(.refs-open) .scrim { display: none; }

  .col-center { height: 100dvh; }
  .messages { padding: 18px 14px 8px; }
  .composer { padding: 8px 12px max(12px, env(safe-area-inset-bottom)); }
  .bubble { max-width: 100%; }
  .empty-hero { margin-top: 6vh; }
}

@media (min-width: 861px) { .scrim { display: none !important; } }

/* 系统深色偏好下仍守禅意：温和的墨底纸字（不引入高饱和） */
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #20262B; --paper-raise: #272E34; --concrete: #2E363D;
    --ink: #E6E1D6; --ink-soft: #B7BEC4; --ink-faint: #7E878E; --line: #353D44;
    --moss-bg: #2A322A; --sandal-bg: #332C24;
  }
  .topbar { background: rgba(32, 38, 43, .9); }
}

/* ---------- PRD v2 visual refresh: ink-paper research workspace ---------- */
:root {
  --paper: #F4F1EA;
  --paper-raise: #FCFAF5;
  --paper-muted: #EFECE3;
  --concrete: #EAEAEA;
  --ink: #243746;
  --ink-soft: #60707B;
  --ink-faint: #8A948E;
  --moss: #637553;
  --moss-bg: #E8ECD8;
  --sandal: #9B8467;
  --sandal-bg: #EEE6D8;
  --line: #D9D2C3;
  --shadow: 0 1px 0 rgba(36, 55, 70, .04), 0 18px 48px rgba(36, 55, 70, .07);
  --radius: 8px;
  --serif: "Songti SC", "Songti TC", "STSong", "SimSun", "Source Han Serif SC",
           "Noto Serif CJK SC", "Noto Serif TC", serif;
  --maxw: 760px;
}

body {
  background: var(--paper);
  color: var(--ink);
  letter-spacing: 0;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.layout {
  grid-template-columns: 286px minmax(480px, 1fr) 326px;
  background: var(--paper);
}

.col-left,
.col-center,
.col-right {
  background: transparent;
}

.col-left {
  position: relative;
  isolation: isolate;
  background: linear-gradient(180deg, rgba(252, 250, 245, .96), rgba(244, 241, 234, .96));
  border-right-color: rgba(36, 55, 70, .12);
}

.col-left::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 44%;
  pointer-events: none;
  z-index: -1;
  background: linear-gradient(180deg, rgba(244, 241, 234, .96), rgba(244, 241, 234, .35) 42%, rgba(244, 241, 234, 0)),
              url("/assets/ink-landscape.webp") left bottom / 120% auto no-repeat;
  opacity: .85;
  filter: saturate(.9);
}

.brand,
.session-list,
.sidebar-foot {
  position: relative;
  z-index: 1;
}

.brand {
  padding: 24px 22px 18px;
  gap: 13px;
}

.brand-seal {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  background: var(--ink);
  box-shadow: inset 0 -10px 16px rgba(255, 255, 255, .04);
}

.brand-text strong {
  font-size: 18px;
  letter-spacing: .08em;
}

.brand-text small {
  color: var(--ink-soft);
  font-size: 12px;
  letter-spacing: .08em;
}

.btn-new {
  position: relative;
  z-index: 1;
  margin: 8px 20px 22px;
  min-height: 44px;
  border: 1px solid rgba(99, 117, 83, .3);
  border-radius: 8px;
  color: #fff;
  background: linear-gradient(180deg, #71815F, #566949);
  box-shadow: 0 10px 24px rgba(86, 105, 73, .18);
  letter-spacing: .08em;
}

.btn-new:hover {
  background: linear-gradient(180deg, #7A8A67, #5C704E);
}

.school-badge {
  position: relative;
  z-index: 1;
  margin: 0 20px 12px;
  border: 1px solid rgba(99, 117, 83, .24);
  border-radius: 6px;
  color: var(--moss);
  background: rgba(232, 236, 216, .82);
}

.session-list {
  padding: 4px 16px 18px;
}

.session-empty {
  color: rgba(96, 112, 123, .74);
}

.session-item {
  border-radius: 0;
  border-bottom: 1px solid rgba(36, 55, 70, .1);
  padding: 12px 10px;
  margin: 0;
  color: var(--ink);
  background: transparent;
}

.session-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 28px;
  gap: 6px;
  align-items: center;
  padding: 4px 8px 4px 10px;
}

.session-main {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: 2px;
  padding: 8px 0;
  border: 0;
  border-radius: 0;
  color: inherit;
  background: transparent;
  text-align: left;
  font-family: inherit;
}

.session-main:hover {
  background: transparent;
}

.session-delete {
  width: 26px;
  height: 26px;
  padding: 0;
  border: 1px solid transparent;
  border-radius: 999px;
  color: rgba(96, 112, 123, .64);
  background: transparent;
  font-size: 18px;
  line-height: 1;
  opacity: 0;
}

.session-row:hover .session-delete,
.session-row:focus-within .session-delete {
  opacity: 1;
}

.session-delete:hover {
  border-color: rgba(156, 91, 91, .28);
  color: var(--danger);
  background: rgba(244, 231, 228, .72);
}

.session-item:hover {
  background: rgba(234, 234, 234, .42);
}

.session-item.active {
  background: rgba(238, 230, 216, .72);
  box-shadow: inset 3px 0 0 var(--sandal);
}

.session-item .s-meta {
  color: rgba(96, 112, 123, .74);
}

.sidebar-showcase {
  padding-bottom: 140px;
}

.side-section-title {
  margin: 8px 4px 10px;
  color: var(--ink);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: .08em;
}

.side-section-gap {
  margin-top: 24px;
}

.showcase-item {
  border: 1px solid rgba(36, 55, 70, .1);
  border-radius: 6px;
  background: rgba(252, 250, 245, .58);
}

.classic-row {
  position: relative;
  padding: 8px 8px 8px 30px;
  color: var(--ink-soft);
  font-size: 14px;
  border-radius: 6px;
}

.classic-row::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 50%;
  width: 10px;
  height: 12px;
  transform: translateY(-50%);
  border: 1px solid rgba(36, 55, 70, .24);
  border-radius: 2px;
  background: rgba(252, 250, 245, .5);
}

.classic-row:hover {
  color: var(--ink);
  background: rgba(234, 234, 234, .42);
}

.sidebar-foot {
  min-height: 52px;
  border-top-color: rgba(36, 55, 70, .12);
  background: rgba(244, 241, 234, .8);
  backdrop-filter: blur(8px);
}

.col-center {
  border-right: 1px solid rgba(36, 55, 70, .1);
}

.topbar {
  min-height: 70px;
  padding: 16px 24px;
  background: rgba(252, 250, 245, .86);
  border-bottom-color: rgba(36, 55, 70, .11);
}

.topbar-title {
  font-size: 18px;
  letter-spacing: .08em;
}

.pill,
.icon-btn {
  border: 1px solid rgba(36, 55, 70, .13);
  background: rgba(252, 250, 245, .72);
  color: var(--ink);
  border-radius: 999px;
}

.pill {
  width: 38px;
  height: 38px;
}

.icon-btn:hover,
.pill:hover {
  border-color: rgba(99, 117, 83, .45);
  background: var(--moss-bg);
}

.messages {
  padding: 38px 28px 12px;
}

.empty-hero {
  margin-top: 10vh;
}

.empty-hero .seal {
  font-size: 76px;
  color: rgba(155, 132, 103, .16);
  line-height: 1;
}

.empty-hero h2 {
  color: var(--ink);
  font-size: 24px;
  font-weight: 400;
  letter-spacing: .16em;
}

.empty-hero p {
  color: var(--ink-soft);
}

.empty-hero .examples {
  max-width: 500px;
  gap: 10px;
  margin-top: 28px;
}

.empty-hero .ex {
  min-height: 46px;
  border-color: rgba(36, 55, 70, .13);
  border-radius: 8px;
  background: rgba(252, 250, 245, .76);
  color: var(--ink-soft);
  box-shadow: 0 1px 0 rgba(36, 55, 70, .03);
}

.empty-hero .ex:hover {
  border-color: rgba(99, 117, 83, .44);
  color: var(--ink);
  background: #fffdf8;
}

.bubble {
  border-radius: 8px;
  box-shadow: none;
}

.turn.user .bubble {
  background: #2E4251;
  color: #FFFCF2;
  border-bottom-right-radius: 3px;
}

.turn.assistant .bubble {
  background: rgba(252, 250, 245, .9);
  border-color: rgba(36, 55, 70, .12);
}

.src-chip,
.mini-btn {
  border-radius: 6px;
}

.net-banner {
  border: 1px solid rgba(155, 132, 103, .18);
  border-radius: 8px;
  background: rgba(238, 230, 216, .72);
}

.composer {
  width: min(calc(100% - 56px), 860px);
  max-width: 860px;
  padding: 10px;
  margin: 0 auto max(18px, env(safe-area-inset-bottom));
  border: 1px solid rgba(36, 55, 70, .12);
  border-radius: 14px;
  background: rgba(252, 250, 245, .9);
  backdrop-filter: blur(10px);
  box-shadow: 0 10px 28px rgba(36, 55, 70, .08);
}

.input {
  max-width: none;
  min-height: 48px;
  border-radius: 8px;
  background: rgba(252, 250, 245, .9);
  border-color: rgba(36, 55, 70, .14);
}

.input:focus {
  border-color: rgba(99, 117, 83, .55);
  box-shadow: 0 0 0 3px rgba(232, 236, 216, .85);
}

.btn-send {
  width: 52px;
  height: 48px;
  border-radius: 8px;
  background: #607151;
  box-shadow: 0 10px 22px rgba(96, 113, 81, .2);
}

.btn-send:not(:disabled):hover {
  background: #536346;
}

.icon-btn.voice {
  border-color: rgba(36, 55, 70, .13);
  background: rgba(252, 250, 245, .72);
}

.col-right {
  background: rgba(252, 250, 245, .68);
  border-left-color: rgba(36, 55, 70, .12);
}

.refs-head {
  min-height: 70px;
  padding: 18px 20px;
  border-bottom-color: rgba(36, 55, 70, .11);
}

.refs-head h2 {
  font-size: 15px;
  letter-spacing: .08em;
}

.refs-list {
  padding: 18px 16px 24px;
}

.refs-empty {
  color: var(--ink-soft);
}

.ref-card {
  border-radius: 8px;
  border-color: rgba(36, 55, 70, .12);
  background: rgba(252, 250, 245, .86);
  box-shadow: 0 1px 0 rgba(36, 55, 70, .04);
}

.ref-card .rc-idx {
  border-radius: 999px;
  background: var(--moss);
}

.ref-card .rc-score i {
  background: var(--moss);
}

.ref-card-muted {
  opacity: .72;
}

.ref-card-muted .rc-ref {
  color: var(--sandal);
}

.ctx-menu {
  border-radius: 8px;
}

@media (max-width: 860px) {
  .layout {
    display: block;
    height: 100dvh;
    overflow: hidden;
  }

  .topbar {
    min-height: 62px;
    padding: 10px 14px;
  }

  .topbar-title {
    font-size: 17px;
  }

  .messages {
    padding: 22px 14px 10px;
  }

  .empty-hero {
    margin-top: 8vh;
    padding: 0 2px;
  }

  .empty-hero .seal {
    font-size: 68px;
  }

  .empty-hero h2 {
    font-size: 22px;
  }

  .empty-hero .examples {
    margin-top: 24px;
  }

  .col-left,
  .col-right {
    position: fixed;
    top: 0;
    bottom: 0;
    z-index: 50;
    background: rgba(252, 250, 245, .96);
  }

  .col-center {
    height: 100dvh;
  }

  .composer {
    width: calc(100% - 24px);
    padding: 8px;
    margin-bottom: max(12px, env(safe-area-inset-bottom));
  }

  .input {
    max-width: none;
  }
}

@media (prefers-color-scheme: dark) {
  .col-left::after {
    opacity: .08;
  }
}