:root {
  --ink: #15212f;
  --muted: #65758a;
  --paper: #f7f3ea;
  --surface: #ffffff;
  --line: #d9e0e8;
  --teal: #0f8b8d;
  --blue: #276ef1;
  --amber: #e2a527;
  --rose: #d54b61;
  --green: #3a9460;
  --shadow: 0 18px 50px rgba(21, 33, 47, 0.14);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

button,
input,
select {
  font: inherit;
}

.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
}

.rail {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 22px;
  background: #17202b;
  color: #edf4f8;
}

.brand-block {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}

.brand-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: var(--amber);
  color: #17202b;
  font-weight: 900;
}

.brand-block strong,
.brand-block small {
  display: block;
}

.brand-block small {
  margin-top: 3px;
  color: rgba(237, 244, 248, 0.72);
  font-size: 12px;
}

.slide-nav {
  display: flex;
  flex-direction: column;
  gap: 6px;
  overflow: auto;
  padding-right: 4px;
}

.nav-item {
  width: 100%;
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 9px;
  align-items: center;
  border: 0;
  border-radius: 7px;
  padding: 9px 10px;
  color: rgba(237, 244, 248, 0.74);
  background: transparent;
  text-align: left;
  cursor: pointer;
}

.nav-item:hover,
.nav-item.active {
  background: rgba(255, 255, 255, 0.12);
  color: #ffffff;
}

.nav-number {
  height: 24px;
  display: grid;
  place-items: center;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.12);
  font-size: 12px;
}

.nav-title {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 13px;
}

.api-state {
  margin-top: auto;
  padding: 11px 12px;
  border-radius: 8px;
  background: rgba(15, 139, 141, 0.2);
  color: #bdebed;
  font-size: 12px;
  line-height: 1.45;
}

.stage {
  min-width: 0;
  min-height: 100vh;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
}

.topbar {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 24px;
  border-bottom: 1px solid var(--line);
  background: rgba(247, 243, 234, 0.88);
  backdrop-filter: blur(10px);
}

.icon-button {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--ink);
  font-size: 26px;
  line-height: 1;
  cursor: pointer;
}

.icon-button:hover {
  border-color: var(--teal);
  color: var(--teal);
}

.progress-wrap {
  flex: 1;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 14px;
  color: var(--muted);
  font-size: 13px;
}

.progress-track {
  height: 8px;
  border-radius: 8px;
  background: #e5ded0;
  overflow: hidden;
}

.progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--teal), var(--amber), var(--rose));
  transition: width 220ms ease;
}

.slide-root {
  min-height: 0;
  padding: clamp(18px, 3.2vw, 42px);
}

.slide {
  min-height: calc(100vh - 122px);
  display: grid;
  grid-template-columns: minmax(320px, 0.95fr) minmax(360px, 1.25fr);
  gap: clamp(18px, 3vw, 38px);
  align-items: stretch;
}

.slide.full {
  grid-template-columns: 1fr;
}

.copy {
  min-width: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 18px;
}

.kicker {
  color: var(--teal);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin: 0;
}

h1 {
  max-width: 980px;
  font-size: clamp(44px, 6vw, 82px);
  line-height: 0.98;
  letter-spacing: 0;
}

h2 {
  font-size: clamp(32px, 4vw, 56px);
  line-height: 1.02;
  letter-spacing: 0;
}

h3 {
  font-size: 20px;
  line-height: 1.18;
}

.lead {
  max-width: 760px;
  color: #344357;
  font-size: clamp(18px, 2vw, 24px);
  line-height: 1.5;
}

.fine {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
}

.panel {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.82);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  background: #fbfcfd;
}

.panel-body {
  padding: clamp(16px, 2.4vw, 26px);
}

.stat-grid,
.module-grid,
.metric-grid {
  display: grid;
  gap: 12px;
}

.stat-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.metric-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.module-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.stat,
.module-card,
.metric,
.concept-pill,
.quiz-option {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
}

.stat,
.metric {
  padding: 14px;
}

.stat strong,
.metric strong {
  display: block;
  color: var(--ink);
  font-size: clamp(24px, 3.2vw, 38px);
  line-height: 1;
}

.stat span,
.metric span {
  display: block;
  margin-top: 6px;
  color: var(--muted);
  font-size: 13px;
}

.module-card {
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-height: 118px;
}

.module-card b {
  font-size: 15px;
}

.module-card span {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.4;
}

.visual {
  min-height: 480px;
  position: relative;
}

.visual canvas,
.visual svg {
  width: 100%;
  height: 100%;
  display: block;
}

.split-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.flow-lane {
  display: grid;
  gap: 14px;
}

.lbg-slide {
  gap: 18px;
}

.lbg-layout {
  display: grid;
  grid-template-columns: minmax(360px, 1.45fr) minmax(280px, 0.75fr);
  gap: clamp(16px, 2.4vw, 28px);
  align-items: stretch;
}

.lbg-figure {
  margin: 0;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.lbg-figure img {
  width: 100%;
  height: auto;
  display: block;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
}

.lbg-figure figcaption {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
}

.lbg-figure a {
  color: var(--teal);
  font-weight: 800;
  text-decoration: none;
}

.idea-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.comparison-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.comparison-strip span {
  min-height: 74px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  color: #344357;
  line-height: 1.45;
}

.comparison-strip b {
  color: var(--ink);
}

.flow-step {
  position: relative;
  padding: 15px;
  border-left: 5px solid var(--teal);
  border-radius: 8px;
  background: #ffffff;
  box-shadow: 0 10px 24px rgba(21, 33, 47, 0.08);
}

.flow-step:nth-child(2n) {
  border-color: var(--amber);
}

.flow-step:nth-child(3n) {
  border-color: var(--rose);
}

.formula {
  display: block;
  width: fit-content;
  max-width: 100%;
  padding: 14px 16px;
  border-radius: 8px;
  background: #17202b;
  color: #edf4f8;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: clamp(15px, 1.8vw, 20px);
  overflow-wrap: anywhere;
}

.controls {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 16px;
}

.control {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 13px;
}

.control input,
.control select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 11px;
  background: #ffffff;
  color: var(--ink);
}

.primary-action {
  border: 0;
  border-radius: 8px;
  padding: 11px 14px;
  background: var(--teal);
  color: #ffffff;
  font-weight: 800;
  cursor: pointer;
}

.primary-action:hover {
  background: #0c7375;
}

.concept-map {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  max-height: 520px;
  overflow: auto;
  padding-right: 4px;
}

.concept-pill {
  min-height: 76px;
  padding: 11px;
  text-align: left;
  cursor: pointer;
}

.concept-pill:hover,
.concept-pill.active {
  border-color: var(--teal);
  box-shadow: 0 8px 20px rgba(15, 139, 141, 0.14);
}

.concept-pill b {
  display: block;
  font-size: 14px;
}

.concept-pill span {
  display: block;
  margin-top: 5px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.35;
}

.focus-box {
  margin-top: 16px;
  padding: 14px;
  border-radius: 8px;
  background: #eef8f7;
  color: #173d3d;
  line-height: 1.55;
}

.tree-diagram {
  height: 360px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfd;
}

.quiz-grid {
  display: grid;
  gap: 14px;
}

.quiz-question {
  display: grid;
  gap: 8px;
}

.quiz-option {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
}

.result-box {
  margin-top: 14px;
  padding: 14px;
  border-radius: 8px;
  background: #fff7df;
  color: #6a4910;
}

.gate-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-top: 14px;
}

.gate {
  border-radius: 8px;
  padding: 11px;
  background: #eef8f7;
  border: 1px solid #bfe2df;
}

.gate.review {
  background: #fff7df;
  border-color: #ecd18f;
}

.gate.reject {
  background: #fff0f2;
  border-color: #efb5bf;
}

.decision {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 6px 10px;
  border-radius: 8px;
  color: #ffffff;
  background: var(--green);
  font-weight: 800;
}

.decision.keep_candidate {
  background: var(--amber);
  color: #241a07;
}

.decision.reject {
  background: var(--rose);
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  color: var(--muted);
  font-size: 12px;
}

.legend span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.legend i {
  width: 10px;
  height: 10px;
  border-radius: 3px;
  display: inline-block;
}

@media (max-width: 980px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .rail {
    min-height: auto;
    padding: 14px;
  }

  .slide-nav {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    max-height: 170px;
  }

  .stage {
    min-height: auto;
  }

  .slide {
    grid-template-columns: 1fr;
  }

  .visual {
    min-height: 360px;
  }

  .module-grid,
  .metric-grid,
  .gate-list,
  .controls {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .concept-map {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .lbg-layout,
  .comparison-strip {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 620px) {
  .slide-root {
    padding: 14px;
  }

  .topbar {
    padding: 12px 14px;
  }

  h1 {
    font-size: 38px;
  }

  h2 {
    font-size: 30px;
  }

  .stat-grid,
  .module-grid,
  .metric-grid,
  .gate-list,
  .controls,
  .concept-map,
  .split-layout,
  .slide-nav {
    grid-template-columns: 1fr;
  }
}