:root {
  --ink: #18211f;
  --muted: #66716f;
  --line: #d8dfdc;
  --paper: #fff;
  --canvas: #f4f6f5;
  --teal: #087f72;
  --teal-soft: #e3f3f0;
  --blue: #2463a5;
  --blue-soft: #e8f0f9;
  --amber: #9b6000;
  --amber-soft: #fff2d9;
  --red: #a13d3d;
  --shadow: 0 10px 30px rgba(24, 43, 39, .07);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--canvas);
  font: 14px/1.6 Inter, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  letter-spacing: 0;
}
button, input, textarea, select { font: inherit; letter-spacing: 0; }
button, select { cursor: pointer; }
a { color: inherit; }
[hidden] { display: none !important; }
svg { width: 18px; height: 18px; stroke-width: 1.9; }

.appbar {
  height: 64px;
  position: sticky;
  top: 0;
  z-index: 30;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, .97);
  backdrop-filter: blur(12px);
}
.appbar-inner { height: 100%; padding: 0 24px; display: flex; align-items: center; justify-content: space-between; gap: 18px; }
.brand { min-width: 0; display: flex; align-items: center; gap: 11px; text-decoration: none; }
.brand-mark { width: 36px; height: 36px; display: grid; place-items: center; flex: 0 0 auto; color: #fff; border-radius: 7px; background: var(--ink); }
.brand-copy strong, .brand-copy span { display: block; }
.brand-copy strong { line-height: 1.2; font-size: 15px; }
.brand-copy span { color: var(--muted); font-size: 10px; }
.topnav { display: flex; align-items: center; gap: 6px; }
.topnav a { min-height: 38px; padding: 0 12px; display: inline-flex; align-items: center; gap: 7px; border: 1px solid transparent; border-radius: 6px; color: #41504c; text-decoration: none; font-size: 12px; font-weight: 700; }
.topnav a:hover, .topnav a.active { border-color: var(--line); background: #f7f9f8; }

.button, .icon-button {
  min-height: 38px;
  padding: 0 13px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--ink);
  background: #fff;
  text-decoration: none;
  font-size: 12px;
  font-weight: 750;
}
.button:hover, .icon-button:hover { border-color: #aab8b4; background: #fafcfb; }
.button.primary { color: #fff; border-color: var(--teal); background: var(--teal); }
.button.dark { color: #fff; border-color: var(--ink); background: var(--ink); }
.icon-button { width: 38px; padding: 0; }

.workspace { width: min(1180px, calc(100% - 32px)); margin: 0 auto; padding: 28px 0 48px; }
.workspace-head { margin-bottom: 18px; display: flex; align-items: flex-end; justify-content: space-between; gap: 18px; }
.workspace-head h1 { margin: 0; font-size: 28px; line-height: 1.25; }
.workspace-head p { margin: 5px 0 0; color: var(--muted); font-size: 12px; }
.panel { border: 1px solid var(--line); border-radius: 7px; background: var(--paper); box-shadow: var(--shadow); }
.eyebrow { color: var(--teal); font-size: 10px; font-weight: 800; text-transform: uppercase; }
.chip { min-height: 24px; padding: 2px 8px; display: inline-flex; align-items: center; gap: 5px; border-radius: 12px; color: #43514d; background: #edf2f0; font-size: 10px; font-weight: 750; }
.chip.blue { color: var(--blue); background: var(--blue-soft); }
.chip.amber { color: var(--amber); background: var(--amber-soft); }
.metric-strip { margin-bottom: 16px; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); overflow: hidden; border: 1px solid var(--line); border-radius: 7px; background: #fff; }
.metric { min-height: 78px; padding: 12px 15px; border-right: 1px solid var(--line); }
.metric:last-child { border-right: 0; }
.metric span, .metric strong { display: block; }
.metric span { color: var(--muted); font-size: 10px; font-weight: 700; }
.metric strong { margin-top: 2px; font-size: 20px; }

input, textarea, select { width: 100%; border: 1px solid #cdd6d3; border-radius: 6px; color: var(--ink); background: #fff; outline: none; }
input, select { min-height: 42px; padding: 0 11px; }
textarea { min-height: 112px; padding: 10px 11px; resize: vertical; }
input:focus, textarea:focus, select:focus { border-color: var(--teal); box-shadow: 0 0 0 3px rgba(8, 127, 114, .11); }

.catalog-layout { min-width: 0; display: grid; grid-template-columns: 220px minmax(300px, .8fr) minmax(360px, 1.2fr); gap: 14px; align-items: start; }
.catalog-layout > * { min-width: 0; max-width: 100%; }
.filter-panel { min-width: 0; position: sticky; top: 80px; padding: 13px; }
.filter-panel h2 { margin: 0 0 9px; font-size: 13px; }
.stage-filter { width: 100%; min-height: 46px; padding: 7px 8px; display: grid; grid-template-columns: 28px 1fr auto; align-items: center; gap: 8px; border: 0; border-radius: 5px; color: var(--muted); background: transparent; text-align: left; }
.stage-filter:hover, .stage-filter.active { color: var(--ink); background: #eef4f2; }
.stage-filter i { width: 26px; height: 26px; display: grid; place-items: center; color: #fff; border-radius: 5px; font-style: normal; font-size: 9px; font-weight: 800; }
.stage-filter strong, .stage-filter small { display: block; }
.stage-filter strong { font-size: 11px; }
.stage-filter small { color: var(--muted); font-size: 9px; }
.stage-filter > span:last-child { font-size: 10px; }
.search-wrap { margin-bottom: 10px; position: relative; }
.search-wrap svg { position: absolute; left: 11px; top: 12px; color: var(--muted); }
.search-wrap input { padding-left: 36px; }
.card-list { overflow: hidden; }
.knowledge-row { width: 100%; min-height: 78px; padding: 12px 13px; display: grid; grid-template-columns: 34px minmax(0, 1fr) auto; align-items: center; gap: 10px; border: 0; border-bottom: 1px solid var(--line); color: var(--ink); background: #fff; text-align: left; }
.knowledge-row:last-child { border-bottom: 0; }
.knowledge-row:hover, .knowledge-row.active { background: #f4f8f7; }
.knowledge-row.active { box-shadow: inset 3px 0 var(--teal); }
.knowledge-row .stage-dot { width: 30px; height: 30px; display: grid; place-items: center; border-radius: 6px; color: #fff; font-size: 9px; font-weight: 800; }
.knowledge-row strong, .knowledge-row small { display: block; }
.knowledge-row strong { font-size: 12px; }
.knowledge-row small { color: var(--muted); font-size: 10px; }
.knowledge-row > span:last-child { color: var(--muted); }
.detail-panel { min-height: 590px; overflow: hidden; }
.detail-head { padding: 19px 20px; border-bottom: 1px solid var(--line); background: #f9fbfa; }
.detail-head h2 { margin: 5px 0 3px; font-size: 21px; }
.detail-head p { margin: 0; color: var(--muted); }
.detail-body { padding: 20px; }
.detail-section + .detail-section { margin-top: 20px; padding-top: 18px; border-top: 1px solid var(--line); }
.detail-section h3 { margin: 0 0 8px; font-size: 12px; }
.question-list { margin: 0; padding-left: 20px; color: #40504c; }
.question-list li + li { margin-top: 6px; }
.detail-action { margin-top: 20px; display: flex; gap: 8px; }
.empty { padding: 42px 20px; color: var(--muted); text-align: center; }

.coach-layout { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(330px, .75fr); gap: 16px; align-items: start; }
.coach-panel { overflow: hidden; }
.coach-top { padding: 15px 17px; display: flex; align-items: center; justify-content: space-between; gap: 12px; border-bottom: 1px solid var(--line); background: #f9fbfa; }
.coach-status { display: flex; align-items: center; gap: 8px; }
.coach-status i { width: 8px; height: 8px; display: block; border-radius: 50%; background: var(--teal); }
.coach-status strong, .coach-status span { display: block; }
.coach-status strong { font-size: 12px; }
.coach-status span { color: var(--muted); font-size: 9px; }
.stepper { padding: 12px 16px; display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); border-bottom: 1px solid var(--line); background: #fff; }
.coach-step { min-width: 0; position: relative; color: var(--muted); text-align: center; font-size: 9px; }
.coach-step::before { width: 12px; height: 12px; margin: 0 auto 4px; position: relative; z-index: 1; display: block; content: ""; border: 2px solid #c8d2cf; border-radius: 50%; background: #fff; }
.coach-step::after { height: 1px; position: absolute; top: 6px; left: 50%; right: -50%; content: ""; background: #dce3e1; }
.coach-step:last-child::after { display: none; }
.coach-step.active, .coach-step.done { color: var(--ink); font-weight: 750; }
.coach-step.active::before { border-color: var(--teal); box-shadow: 0 0 0 3px var(--teal-soft); }
.coach-step.done::before { border-color: var(--teal); background: var(--teal); }
.conversation { height: 430px; padding: 18px; overflow-y: auto; background: #f7f9f8; }
.message { max-width: 84%; margin-bottom: 12px; padding: 11px 13px; border: 1px solid var(--line); border-radius: 7px; background: #fff; }
.message.user { margin-left: auto; color: #fff; border-color: var(--teal); background: var(--teal); }
.message strong { display: block; margin-bottom: 2px; font-size: 10px; }
.message p { margin: 0; }
.composer { padding: 14px; border-top: 1px solid var(--line); background: #fff; }
.composer textarea { min-height: 92px; }
.composer-actions { margin-top: 9px; display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.composer-actions span { color: var(--muted); font-size: 10px; }
.canvas-panel { position: sticky; top: 80px; overflow: hidden; }
.canvas-head { padding: 15px 16px; border-bottom: 1px solid var(--line); background: #f9fbfa; }
.canvas-head h2 { margin: 0; font-size: 15px; }
.canvas-head p { margin: 2px 0 0; color: var(--muted); font-size: 10px; }
.canvas-grid { display: grid; }
.canvas-cell { min-height: 80px; padding: 11px 13px; border-bottom: 1px solid var(--line); }
.canvas-cell:last-child { border-bottom: 0; }
.canvas-cell span { display: block; color: var(--muted); font-size: 9px; font-weight: 800; }
.canvas-cell p { margin: 4px 0 0; color: #40504c; font-size: 11px; white-space: pre-wrap; }
.canvas-cell.empty p { color: #9aa5a1; }
.canvas-actions { padding: 12px; display: flex; gap: 7px; border-top: 1px solid var(--line); }
.canvas-actions .button { flex: 1; }
.toast { position: fixed; right: 20px; bottom: 20px; z-index: 50; padding: 10px 14px; color: #fff; border-radius: 6px; background: var(--ink); box-shadow: var(--shadow); opacity: 0; transform: translateY(8px); pointer-events: none; transition: .2s ease; }
.toast.show { opacity: 1; transform: translateY(0); }

@media (max-width: 980px) {
  .catalog-layout { grid-template-columns: 190px minmax(280px, .8fr) minmax(330px, 1.2fr); }
  .coach-layout { grid-template-columns: 1fr; }
  .canvas-panel { position: static; }
}

@media (max-width: 760px) {
  .appbar-inner { padding: 0 12px; }
  .brand-copy span, .topnav a span { display: none; }
  .topnav a { width: 38px; padding: 0; justify-content: center; }
  .workspace { width: min(100% - 20px, 1180px); padding-top: 18px; }
  .workspace-head { align-items: flex-start; flex-direction: column; }
  .workspace-head h1 { font-size: 23px; }
  .metric-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .metric { border-bottom: 1px solid var(--line); }
  .metric:nth-child(2) { border-right: 0; }
  .metric:nth-last-child(-n + 2) { border-bottom: 0; }
  .catalog-layout { grid-template-columns: 1fr; }
  .filter-panel { position: static; }
  .stage-filters { width: 100%; min-width: 0; max-width: 100%; display: flex; overflow-x: auto; overscroll-behavior-inline: contain; }
  .stage-filter { min-width: 132px; }
  .detail-panel { min-height: 0; }
  .conversation { height: 390px; }
  .message { max-width: 94%; }
  .stepper { padding-inline: 8px; }
  .coach-step { font-size: 8px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .toast { transition: none; }
}