@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:ital,wght@0,400;0,500;0,600;0,700;1,400&family=Noto+Sans+SC:wght@400;500;600;700&family=Source+Serif+4:opsz,wght@8..60,500;8..60,650&family=Noto+Serif+SC:wght@500;600&display=swap');

:root {
  --bg: #f7f4ee;
  --sidebar: #16302b;
  --sidebar-2: #1c3b35;
  --ink: #1c1915;
  --muted: #6f6a61;
  --line: #e4ddd0;
  --hover: #efe8da;
  --active: #e7f0ec;
  --teal: #1f4d45;
  --teal-2: #16302b;
  --seal: #c45c26;
  --user-bubble: #e7efe9;
  --danger: #b42318;
  --ok: #2f7d55;
  --paper: #fffdf7;
  --shadow: 0 10px 32px rgba(22, 48, 43, 0.1);
  --sans: "IBM Plex Sans", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --serif: "Source Serif 4", "Noto Serif SC", "Songti SC", serif;
  --mono: ui-monospace, "Cascadia Mono", Consolas, monospace;
  --radius: 16px;
  --sidebar-w: 268px;
  --rail-w: 440px;
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  font-family: var(--sans);
  color: var(--ink);
  background: var(--bg);
}
button, input, textarea { font-family: inherit; }
a { color: inherit; }
.hidden { display: none !important; }

.icon-btn {
  width: 34px;
  height: 34px;
  border: 0;
  background: transparent;
  color: inherit;
  border-radius: 10px;
  cursor: pointer;
  display: grid;
  place-items: center;
}
.icon-btn:hover { background: rgba(255,255,255,0.08); }

.gate-body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background:
    radial-gradient(800px 360px at 50% -8%, #dce8e3 0%, transparent 58%),
    #f4efe6;
}
.gate-top, .gate-foot {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 22px 32px;
  color: var(--muted);
  font-size: 13px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: inherit;
  font-weight: 700;
  font-size: 18px;
  letter-spacing: -0.03em;
}
.brand img { width: 28px; height: 28px; }
.gate-back { color: var(--teal); font-weight: 650; text-decoration: none; }
.gate-back:hover { text-decoration: underline; }
.gate-note { margin: -6px 0 16px; color: var(--muted); font-size: 13px; line-height: 1.55; }
.gate-main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}
.gate-kicker {
  margin: 0 0 14px;
  color: var(--seal);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.card {
  width: 100%;
  max-width: 400px;
  background: #fffdf8;
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 28px;
  box-shadow: var(--shadow);
}
.tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  background: #efe8da;
  border-radius: 12px;
  padding: 4px;
  margin-bottom: 20px;
}
.tab {
  border: 0;
  background: transparent;
  color: var(--muted);
  height: 36px;
  border-radius: 9px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
}
.tab.on {
  background: #fff;
  color: var(--ink);
  box-shadow: 0 1px 4px rgba(28, 25, 21, 0.08);
}
.auth-form label, .modal label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 14px;
}
.auth-form input, .modal input, .paper-title {
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0 12px;
  font-size: 15px;
  outline: none;
  color: var(--ink);
  background: #fff;
}
.auth-form input:focus, .modal input:focus, .paper-title:focus {
  border-color: var(--teal);
  box-shadow: 0 0 0 3px rgba(31, 77, 69, 0.12);
}
.wax {
  width: 100%;
  height: 44px;
  border: 0;
  border-radius: 12px;
  background: var(--teal);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
}
.wax:hover { background: var(--teal-2); }
.auth-msg, .modal-msg { min-height: 1.3em; color: var(--danger); font-size: 13px; }
.consent-row {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  margin: 2px 0 12px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.55;
}
.consent-row input { width: 16px; height: 16px; margin: 3px 0 0; accent-color: var(--teal); }
.consent-link, .ghost {
  border: 0;
  background: none;
  color: var(--teal);
  font: inherit;
  cursor: pointer;
}
.consent-mask, .modal-mask, .sidebar-mask {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: rgba(22, 48, 43, 0.42);
}
.consent-mask.hidden, .modal-mask.hidden { display: none; }
.consent-dialog, .modal {
  width: min(460px, 100%);
  background: #fffdf8;
  border-radius: 18px;
  padding: 24px;
  box-shadow: 0 18px 50px rgba(22, 48, 43, 0.2);
}
.consent-dialog h2, .modal h2 {
  margin: 0 0 10px;
  font-family: var(--serif);
  font-size: 22px;
}
.consent-dialog p, .modal p, .consent-dialog li {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.65;
}
.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 8px;
}
.modal-actions .wax { width: auto; padding: 0 18px; }
.ghost {
  height: 44px;
  padding: 0 12px;
  color: var(--muted);
}

.os-body {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr var(--rail-w);
  height: 100vh;
  overflow: hidden;
}
.os-body > * { min-height: 0; min-width: 0; }
.os-body.collapsed { grid-template-columns: 0 1fr var(--rail-w); }
.os-body.collapsed .sidebar { transform: translateX(-100%); }
.os-body.rail-off { grid-template-columns: var(--sidebar-w) 1fr 0; }
.os-body.collapsed.rail-off { grid-template-columns: 0 1fr 0; }
.os-body.rail-off .data-rail { transform: translateX(100%); }

.col-resizer {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 8px;
  z-index: 40;
  cursor: col-resize;
}
#resize-sidebar { right: 0; }
#resize-rail { left: 0; }

.sidebar {
  position: relative;
  background: var(--sidebar);
  color: #e8efe9;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  z-index: 20;
}
.sidebar-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 12px 8px;
}
.sidebar .brand { color: #f4efe4; }
.sidebar .icon-btn { color: #c9d6cf; }
.new-chat {
  margin: 6px 12px 10px;
  height: 40px;
  border: 1px solid rgba(255,255,255,0.12);
  background: var(--sidebar-2);
  border-radius: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: #f4efe4;
  font-size: 14px;
  font-weight: 500;
}
.new-chat:hover { border-color: #c45c26; color: #ffd7be; }
.search-wrap { margin: 0 12px 10px; position: relative; }
.search-wrap svg { position: absolute; left: 10px; top: 10px; color: #9bb0a8; }
.search-wrap input {
  width: 100%;
  height: 36px;
  border: 0;
  background: #10241f;
  border-radius: 10px;
  padding: 0 10px 0 32px;
  outline: none;
  font-size: 13px;
  color: #f4efe4;
}
.session-pane { flex: 1; overflow: auto; padding: 0 8px 12px; }
.session-label { font-size: 12px; color: #93a69e; padding: 6px 8px 8px; }
#session-list { list-style: none; margin: 0; padding: 0; }
#session-list li {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 9px 8px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 13.5px;
}
#session-list li:hover { background: rgba(255,255,255,0.06); }
#session-list li.on { background: #24554c; }
.session-title {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}
.session-del {
  opacity: 0;
  width: 26px;
  height: 26px;
  border: 0;
  background: transparent;
  color: #c9d6cf;
  border-radius: 8px;
  cursor: pointer;
}
#session-list li:hover .session-del { opacity: 1; }
.session-del:hover { background: #5a2218; color: #ffd0c8; }
.sidebar-foot {
  padding: 10px 12px 14px;
  display: flex;
  align-items: center;
  gap: 8px;
  border-top: 1px solid rgba(255,255,255,0.08);
}
.who-chip {
  flex: 1;
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: #c9d6cf;
}
.who-chip #who { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--seal);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 12px;
  font-weight: 600;
}
#logout {
  border: 0;
  background: transparent;
  color: #c9d6cf;
  cursor: pointer;
  font-size: 12px;
  padding: 6px 8px;
  border-radius: 8px;
}
#logout:hover { background: rgba(255,255,255,0.08); color: #fff; }

.stage {
  display: flex;
  flex-direction: column;
  background: var(--bg);
  position: relative;
  min-width: 0;
}
.stage-bar {
  height: 56px;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 20px;
}
.run-meter {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 12px;
  margin-right: auto;
}
.run-dot { width: 7px; height: 7px; border-radius: 50%; background: #c5c0b5; }
.run-meter.live .run-dot { background: var(--teal); animation: pulse 1.2s ease-in-out infinite; }
.run-meter.done .run-dot { background: var(--ok); }
.run-meter.err .run-dot { background: var(--danger); }
@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.35); opacity: 0.5; }
}

.chat-scroll { flex: 1; min-height: 0; overflow: auto; position: relative; }
.empty-state {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 24px 16px 96px;
}
.empty-state img { width: 56px; height: 56px; }
.empty-state h1 {
  margin: 8px 0 0;
  font-family: var(--serif);
  font-size: 30px;
  letter-spacing: -0.03em;
}
.empty-state p { margin: 0; color: var(--muted); }
.hello-guide { width: min(520px, 100%); margin-top: 18px; }
.hello-label { text-align: center; color: var(--muted); font-size: 13px; margin-bottom: 10px; }
.hello-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.hello-grid span {
  border: 1px solid var(--line);
  background: #fffdf8;
  border-radius: 12px;
  padding: 10px 12px;
  font-size: 13px;
}
.os-body.chatting .empty-state { display: none; }

.stream { width: min(760px, calc(100% - 40px)); margin: 0 auto; padding: 12px 0 28px; }
.bubble { display: flex; margin: 18px 0; }
.bubble.user { justify-content: flex-end; }
.bubble.user .body {
  max-width: 78%;
  background: var(--user-bubble);
  padding: 10px 14px;
  border-radius: 14px 14px 4px 14px;
  line-height: 1.65;
  font-size: 15px;
}
.bubble.assistant .body { width: 100%; line-height: 1.75; font-size: 15.5px; }

.md > *:first-child { margin-top: 0; }
.md > *:last-child { margin-bottom: 0; }
.md h1, .md h2, .md h3, .md h4 {
  font-family: var(--serif);
  font-weight: 650;
  line-height: 1.3;
  margin: 1.05em 0 0.4em;
}
.md h1 { font-size: 1.5em; }
.md h2 { font-size: 1.22em; }
.md h3 { font-size: 1.08em; }
.md p { margin: 0.6em 0; }
.md ul, .md ol { margin: 0.4em 0 0.7em; padding-left: 1.35em; }
.md hr { border: 0; border-top: 1px solid var(--line); margin: 1em 0; }
.md blockquote {
  margin: 0.7em 0;
  padding-left: 12px;
  border-left: 3px solid var(--seal);
  color: var(--muted);
}
.md code { font-family: var(--mono); font-size: 0.86em; background: #efe8da; padding: 0.12em 0.35em; border-radius: 5px; }
.md pre { margin: 0.7em 0; padding: 12px; background: #1c1915; color: #f4efe4; border-radius: 12px; overflow: auto; }
.md pre code { background: none; color: inherit; }
.md a { color: var(--teal); }
.md table { border-collapse: collapse; width: 100%; margin: 0.8em 0; font-size: 13px; }
.md th, .md td { border: 1px solid var(--line); padding: 7px 10px; vertical-align: top; }
.md th { background: #f3eee3; }

.think-row { display: flex; align-items: center; gap: 8px; margin: 10px 0; color: var(--muted); font-size: 13px; }
.think-row .run-dot { animation: pulse 1.2s ease-in-out infinite; background: var(--teal); }
.abort-note { color: var(--danger); font-size: 13px; margin: 8px 0; }

.skill-card {
  margin: 12px 0;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fffdf8;
  overflow: hidden;
}
.skill-card.running { border-color: #9bb8b0; box-shadow: 0 0 0 3px #e7f0ec; }
.skill-card.err { border-color: #f0c2bc; }
.skill-head {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  border: 0;
  background: #f3eee3;
  padding: 9px 12px;
  cursor: pointer;
  text-align: left;
}
.skill-chevron {
  width: 7px;
  height: 7px;
  border-right: 1.6px solid var(--muted);
  border-bottom: 1.6px solid var(--muted);
  transform: rotate(-45deg);
  flex-shrink: 0;
}
.skill-card.open .skill-chevron { transform: rotate(45deg); }
.skill-lang {
  font-size: 10px;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 4px;
  background: #5b6475;
  color: #fff;
}
.skill-lang.web { background: #0f766e; }
.skill-lang.rag { background: #c45c26; }
.skill-lang.doc { background: #1f4d45; }
.skill-title { font-size: 13px; font-weight: 600; }
.skill-file {
  min-width: 0;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.skill-state { margin-left: auto; font-size: 11px; color: var(--teal); }
.skill-card.ok .skill-state { color: var(--ok); }
.skill-card.err .skill-state { color: var(--danger); }
.skill-body { display: none; border-top: 1px solid var(--line); }
.skill-card.open .skill-body { display: block; }
.skill-md { padding: 12px 14px; font-size: 13.5px; }
.skill-out {
  margin: 0;
  padding: 12px;
  font-family: var(--mono);
  font-size: 12px;
  white-space: pre-wrap;
  background: #1c1915;
  color: #d8cfc0;
  max-height: 280px;
  overflow: auto;
}

.composer-dock {
  width: min(760px, calc(100% - 32px));
  margin: 0 auto 18px;
}
.cite-chips { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 8px; }
.cite-chips:empty { display: none; }
.cite-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  max-width: 100%;
  background: #fffdf8;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 8px 4px 10px;
  font-size: 12px;
  color: var(--teal);
}
.cite-chip b { max-width: 280px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-weight: 600; }
.cite-chip button {
  border: 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}
.composer {
  position: relative;
  background: #fffdf8;
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: var(--shadow);
  padding: 12px;
}
.composer textarea {
  width: 100%;
  border: 0;
  resize: none;
  outline: none;
  font-size: 15px;
  line-height: 1.55;
  background: transparent;
  max-height: 180px;
}
.composer-bar {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 8px;
}
.composer-hint { margin-right: auto; font-size: 11px; color: var(--muted); }
.send-btn {
  width: 36px;
  height: 36px;
  border: 0;
  border-radius: 50%;
  background: var(--teal);
  color: #fff;
  cursor: pointer;
}
.send-btn:disabled { opacity: 0.4; cursor: default; }
.stop-btn {
  height: 32px;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 999px;
  padding: 0 12px;
  cursor: pointer;
}
.mention-menu {
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: calc(100% - 8px);
  background: #fffdf8;
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: var(--shadow);
  max-height: 220px;
  overflow: auto;
  z-index: 5;
}
.mention-menu button {
  display: block;
  width: 100%;
  text-align: left;
  border: 0;
  background: transparent;
  padding: 8px 12px;
  cursor: pointer;
  font-size: 13px;
}
.mention-menu button:hover, .mention-menu button.on { background: var(--active); }

.data-rail {
  position: relative;
  background: #efe8da;
  border-left: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.rail-head {
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px 0 20px;
  flex-shrink: 0;
}
.rail-title {
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 650;
}
.export-wrap {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}
.export-label {
  font-size: 12px;
  color: var(--muted);
  margin-right: 2px;
}
.export-btn {
  height: 32px;
  padding: 0 10px;
  border: 1px solid #c9bfab;
  background: #fffdf8;
  border-radius: 8px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.02em;
  cursor: pointer;
  color: var(--teal);
}
.export-btn:hover {
  border-color: var(--teal);
  background: var(--active);
}
.export-btn:disabled { opacity: 0.4; cursor: default; }
.paper {
  flex: 1;
  min-height: 0;
  margin: 0 14px 14px;
  background: var(--paper);
  border: 1px solid #ddd4c4;
  box-shadow: 0 10px 28px rgba(28, 25, 21, 0.08);
  overflow: auto;
  padding: 22px 26px 36px;
  background-image:
    linear-gradient(90deg, transparent 28px, rgba(196, 92, 38, 0.18) 28px, rgba(196, 92, 38, 0.18) 29px, transparent 29px);
}
.paper-title-label {
  display: block;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--seal);
  margin-bottom: 6px;
}
.paper-title {
  width: 100%;
  height: auto;
  min-height: 44px;
  border: 0;
  border-bottom: 1px dashed #d5ccbb;
  border-radius: 0;
  background: transparent;
  font-family: var(--serif);
  font-size: 26px;
  font-weight: 650;
  padding: 4px 0 10px;
  margin-bottom: 10px;
}
.paper-title:disabled { color: var(--muted); }
.paper-body { font-family: var(--serif); font-size: 15.5px; line-height: 1.8; }
.paper-body h1 { display: none; }
.rail-empty { color: var(--muted); font-family: var(--sans); }

.cite-pop {
  position: fixed;
  z-index: 70;
  transform: translate(-50%, -120%);
}
.cite-pop button {
  height: 32px;
  padding: 0 12px;
  border: 0;
  border-radius: 999px;
  background: var(--teal);
  color: #fff;
  cursor: pointer;
  box-shadow: var(--shadow);
  font-size: 12px;
  font-weight: 600;
}

.hub-body .hub-who {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
}
.hub-body .hub-who button {
  border: 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font: inherit;
}
.hub-body .hub-who button:hover { color: var(--ink); }
.hub-main {
  flex: 1;
  width: min(880px, calc(100% - 48px));
  margin: 0 auto;
  padding: 24px 0 48px;
}
.hub-main h1 {
  margin: 0 0 10px;
  font-family: var(--serif);
  font-size: 36px;
  letter-spacing: -0.03em;
}
.hub-lead {
  margin: 0 0 28px;
  color: var(--muted);
  font-size: 15px;
}
.hub-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
.hub-card {
  display: flex;
  flex-direction: column;
  min-height: 240px;
  padding: 24px;
  background: #fffdf8;
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: var(--shadow);
  text-decoration: none;
  color: inherit;
}
.hub-card:hover {
  border-color: var(--teal);
  box-shadow: 0 14px 36px rgba(22, 48, 43, 0.14);
}
.hub-card-kicker {
  color: var(--seal);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.hub-card h2 {
  margin: 10px 0 8px;
  font-family: var(--serif);
  font-size: 26px;
}
.hub-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.65;
  font-size: 14px;
}
.hub-card-go {
  margin-top: auto;
  padding-top: 22px;
  color: var(--teal);
  font-weight: 600;
  font-size: 14px;
}
.module-chip {
  margin: 0 12px 4px;
  color: #ffd7be;
  font-size: 12px;
  font-weight: 600;
}
.module-switch {
  margin: 0 12px 8px;
  color: #9bb0a8;
  font-size: 12px;
  text-decoration: none;
}
.module-switch:hover { color: #ffd7be; }
body[data-mode="create"] .empty-revise { display: none !important; }
body[data-mode="revise"] .empty-create { display: none !important; }
.dropzone {
  width: min(440px, 100%);
  margin-top: 18px;
  padding: 28px 20px;
  border: 1.5px dashed #c9bfab;
  border-radius: 16px;
  background: #fffdf8;
  text-align: center;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.dropzone strong { font-size: 15px; }
.dropzone span { color: var(--muted); font-size: 13px; }
.dropzone:hover, .dropzone.dragover {
  border-color: var(--teal);
  background: var(--active);
}
.upload-msg { min-height: 1.3em; color: var(--danger); font-size: 13px; }
@media (max-width: 720px) {
  .hub-grid { grid-template-columns: 1fr; }
}

.mobile-only { display: none; }
.sidebar-mask { display: none; }

@media (max-width: 1100px) {
  .os-body, .os-body.rail-on, .os-body.collapsed { grid-template-columns: 0 1fr 0; }
  .mobile-only { display: grid; }
  .sidebar { position: fixed; width: min(84vw, 300px); height: 100%; transform: translateX(-100%); }
  .os-body.drawer .sidebar { transform: none; }
  .os-body.drawer .sidebar-mask { display: block; }
  .data-rail { position: fixed; right: 0; width: min(92vw, 440px); height: 100%; transform: translateX(100%); z-index: 25; }
  .os-body.rail-on .data-rail { transform: none; }
}