:root {
  color-scheme: dark;
  --bg: #111820;
  --card: #1c2731;
  --card-soft: #17232c;
  --card-deep: #121c25;
  --line: #344451;
  --line-strong: #576b7c;
  --text: #eaf0f3;
  --muted: #b2c3cc;
  --accent: #f5b75f;
  --accent-deep: #d9953c;
  --cyan: #92d6ed;
  --green: #8ed7b1;
  --amber: #f5cb86;
  --red: #edb2a9;
  --violet: #bbb5f2;
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 15px/1.5 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
button, input, select, textarea { font: inherit; color: var(--text); background: var(--card-deep); border: 1px solid var(--line-strong); border-radius: 7px; padding: 9px 11px; }
button { cursor: pointer; }
button:hover { border-color: var(--accent); }
button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
button:disabled { opacity: .45; cursor: not-allowed; }
h1 { font-size: 28px; margin: 4px 0; letter-spacing: -.02em; }
h2 { font-size: 19px; margin: 0 0 12px; }
h3 { margin: 0 0 8px; }
small { letter-spacing: .08em; color: var(--muted); }
p { max-width: 86ch; }
em { color: var(--muted); font-style: normal; font-size: 12px; }
[hidden] { display: none !important; }

.site-header { padding: 24px max(20px, calc((100vw - 1350px) / 2)); border-bottom: 1px solid var(--line); display: flex; justify-content: space-between; gap: 20px; align-items: center; }
.site-header nav, .toolbar { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.header-actions { display: flex; align-items: end; gap: 22px; }
.engine-control { margin: 0; min-width: 210px; color: var(--muted); font-size: 12px; }
.engine-control select { margin-top: 4px; }
.engine-control span { display: block; margin-top: 4px; color: var(--green); font-size: 11px; }
.nav-link { border-color: transparent; color: var(--cyan); text-decoration: underline; text-underline-offset: 4px; background: transparent; padding-inline: 4px; }
main { max-width: 1390px; margin: auto; padding: 20px; }
.sync { color: var(--green); }
.muted { color: var(--muted); font-size: 13px; }
.primary { background: var(--accent); color: var(--bg); border-color: var(--accent); font-weight: 750; }
.toolbar { justify-content: space-between; }
.toolbar h2 { margin-bottom: 0; }
.toolbar.end { justify-content: flex-end; margin-top: 18px; }
.engine-badge { border: 1px solid #4f7a63; border-radius: 999px; padding: 5px 10px; color: var(--green); font-size: 12px; }
.tutor-form label { color: var(--muted); }
.tutor-answer { margin-top: 14px; padding: 16px; border-left: 4px solid var(--cyan); background: #172630; white-space: pre-wrap; }
.tutor-answer.error { border-color: var(--red); background: #352522; }

.target, .panel, .cards > div { background: var(--card); padding: 20px; border: 1px solid var(--line); border-radius: 12px; margin-bottom: 18px; }
.target { border-left: 5px solid var(--accent); }
.target strong { color: var(--accent); }
.target h2 { font-size: 26px; margin-top: 8px; }
.cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.cards b { display: block; font-size: 27px; }
.cards small { letter-spacing: 0; }
.cards span { color: var(--muted); font-size: 12px; }

.subject-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; margin-top: 20px; }
.subject-card { text-align: left; background: var(--card-soft); border: 1px solid var(--line); border-radius: 7px; padding: 0; overflow: hidden; }
.subject-card:hover { background: #202f3a; }
.subject-card .subject-head { display: flex; justify-content: space-between; gap: 15px; padding: 18px; border-bottom: 1px solid var(--line); }
.subject-card h3 { font-size: 20px; }
.subject-card .score { color: var(--accent); font-size: 20px; font-weight: 800; white-space: nowrap; }
.subject-card .subject-body { padding: 14px 18px 18px; }
.subject-card p { color: var(--muted); margin: 0 0 14px; }
.subject-card .bar, .state-bar { display: block; height: 5px; background: #0d141a; border-radius: 8px; overflow: hidden; }
.subject-card .bar i, .state-bar i { display: block; height: 100%; background: var(--green); }
.subject-card .meta { display: flex; justify-content: space-between; gap: 10px; margin-top: 9px; font-size: 12px; color: var(--muted); }

.action-queues { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin: 22px 0; }
.action-queues section { min-width: 0; }
.action-queues h2 { margin-bottom: 4px; }
.action-queues > section > p { color: var(--muted); font-size: 13px; margin-top: 0; }
.queue-node { display: flex; width: 100%; flex-direction: column; gap: 4px; text-align: left; background: #1a252e; border: 0; border-bottom: 1px solid var(--line); border-radius: 0; padding: 12px; min-height: 72px; line-height: 1.35; }
.queue-node:hover { background: #263541; }
.queue-node.static { cursor: default; }
.queue-node small { font-size: 11px; letter-spacing: 0; }

.ready { color: #9be0b9; }
.guided { color: #99d6ee; }
.review { color: var(--amber); }
.unknown { color: #91a2ad; }
.mastered { color: #c2ebd2; }
.blocked { color: var(--red); }

.view-tabs { margin: 12px 0 20px; border-bottom: 1px solid var(--line); padding-bottom: 12px; display: flex; gap: 12px; }
.view-tabs button { border-radius: 3px; }
.view-tabs [aria-pressed="true"] { background: var(--accent); color: var(--bg); border-color: var(--accent); font-weight: 750; }

.state-comparison { display: grid; grid-template-columns: 1fr 70px 1fr 70px 1fr; align-items: stretch; gap: 8px; margin-bottom: 26px; }
.state-card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 18px; }
.state-card.initial { border-top: 4px solid #607483; opacity: .82; }
.state-card.current { border-top: 4px solid var(--accent); }
.state-card.final { border: 1px dashed #78b795; border-top: 4px solid var(--green); background: linear-gradient(135deg, #1c2731, #172a24); }
.state-card p { color: var(--muted); font-size: 13px; }
.state-path { display: flex; align-items: center; gap: 5px; color: var(--accent); }
.state-path span { height: 1px; flex: 1; background: var(--line-strong); }

.cockpit { margin-bottom: 24px; }
.cockpit-heading { display: flex; justify-content: space-between; align-items: center; gap: 12px; }
.cockpit-heading h2 { font-size: 26px; margin: 4px 0; }
.cockpit-controls { display: flex; flex-wrap: wrap; align-items: end; gap: 12px; margin: 20px 0 12px; }
.cockpit-controls label { display: flex; flex-direction: column; gap: 4px; max-width: 100%; }
.legend { display: flex; flex-wrap: wrap; gap: 16px; font-size: 13px; margin: 14px 0; }
.map-scroll { overflow-x: auto; border: 1px solid var(--line); border-radius: 5px; }
.map-table { min-width: 1050px; }
.map-row { display: grid; grid-template-columns: 140px repeat(6, minmax(135px, 1fr)); gap: 6px; align-items: stretch; padding: 8px; border-top: 1px solid var(--line); }
.map-head { background: #22313b; border-top: 0; font-size: 13px; position: sticky; top: 0; z-index: 1; }
.map-row > strong { align-self: center; font-size: 12px; }
.stage-cell { text-align: left; border: 1px solid #3c515f; border-radius: 3px; padding: 8px; min-height: 98px; background: #1c2932; display: flex; flex-direction: column; gap: 3px; }
.stage-cell b { font-size: 13px; }
.stage-cell span, .stage-cell small { font-size: 11px; letter-spacing: 0; }
.stage-cell progress { width: 100%; height: 4px; accent-color: #7bcaa0; margin-top: auto; }
.stage-cell.ready { background: #1b3029; }
.stage-cell.review { background: #332d21; }
.stage-cell.guided { background: #1a2d37; }
.stage-cell.unknown { opacity: .62; }
.mobile-stage-nav { display: none; }

.notion-list, .memory-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.notion-list button, .memory-grid article { text-align: left; background: var(--card-soft); border: 1px solid var(--line); border-radius: 5px; padding: 14px; display: flex; flex-direction: column; gap: 6px; }
.memory-grid article.due { background: #332d21; }

dialog { background: var(--card); color: var(--text); border: 1px solid #788d9d; border-radius: 12px; width: min(900px, 96vw); max-height: 94vh; padding: 24px; }
dialog::backdrop { background: #02090dd8; backdrop-filter: blur(2px); }
.formgrid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
label { display: block; margin-bottom: 10px; }
label input, label select, label textarea { display: block; width: 100%; margin-top: 5px; }
textarea { min-height: 88px; resize: vertical; }
.callout { padding: 12px; background: #302a20; border-left: 4px solid var(--accent); color: var(--muted); }

.game-dialog { width: min(1100px, 96vw); }
.game-brief { color: var(--muted); }
.game-board { min-height: 290px; background: #101820; border: 1px solid var(--line); border-radius: 8px; padding: 32px 22px; display: flex; justify-content: center; align-items: center; flex-wrap: wrap; gap: 12px; position: relative; }
.shape { min-width: 150px; min-height: 95px; display: flex; flex-direction: column; justify-content: center; align-items: center; text-align: center; padding: 14px; }
.shape.actor { clip-path: polygon(25% 0, 75% 0, 100% 50%, 75% 100%, 25% 100%, 0 50%); background: #223848; }
.shape.decision { background: #3a3020; border: 2px solid var(--accent); transform: rotate(45deg); width: 120px; height: 120px; min-width: 120px; min-height: 120px; }
.shape.decision > * { transform: rotate(-45deg); }
.shape.data { border-radius: 50% / 18%; border: 2px solid #6f8b9d; background: #1c2a34; }
.arrow { color: var(--accent); font-size: 28px; pointer-events: none; }
.drop-slot { border: 2px dashed #6f8290; min-width: 165px; min-height: 90px; color: var(--muted); }
.drop-slot.filled { border-style: solid; border-color: var(--green); color: var(--text); background: #1b3029; }
.drop-slot.wrong { border-color: var(--red); background: #352522; }
.return-line { flex-basis: 100%; display: flex; justify-content: center; align-items: center; gap: 10px; color: var(--cyan); }
.return-line .drop-slot { min-height: 52px; }
.instruction { text-align: center; color: var(--muted); }
.piece-tray { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.piece-tray button { text-align: left; display: grid; grid-template-columns: 36px 1fr; gap: 2px 8px; align-items: center; }
.piece-tray button.selected { border-color: var(--accent); background: #302a20; }
.piece-tray button.used { opacity: .4; }
.piece-tray small { grid-column: 2; letter-spacing: 0; }
.mini-shape { grid-row: 1 / 3; width: 28px; height: 28px; display: inline-block; }
.mini-shape.process { border: 2px solid var(--green); background: #1b3029; }
.mini-shape.flow { border-radius: 50%; border: 2px solid var(--cyan); }
.mini-shape.store { border-radius: 50% / 18%; border: 2px solid var(--violet); }
.game-feedback { border-left: 4px solid var(--cyan); background: #172630; padding: 11px 13px; max-width: none; }
.game-feedback.success { border-color: var(--green); background: #193027; }
.concept-reveal { border: 1px solid #4b6e5b; border-radius: 6px; padding: 18px; background: #172a24; }
.concept-reveal h3 em { color: var(--green); font-size: inherit; }
.journal-events { display: grid; gap: 1px; background: var(--line); }
.journal-event { background: var(--card-soft); padding: 12px; }
.journal-event time { color: var(--muted); font-size: 11px; }
.login-dialog { width: min(430px, 94vw); }
.login-dialog::backdrop { background: #02090df2; }
.login-dialog h2 { margin-top: 7px; font-size: 25px; }
.login-dialog button { width: 100%; margin-top: 8px; }
.login-feedback { color: var(--red); min-height: 1.5em; font-size: 13px; }

@media (max-width: 850px) {
  .state-comparison { grid-template-columns: 1fr; }
  .state-path { min-height: 28px; justify-content: center; }
  .state-path span { max-width: 80px; }
  .subject-grid, .notion-list, .memory-grid { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .site-header { padding: 20px; display: block; }
  .header-actions { display: block; }
  .engine-control { margin-top: 16px; }
  .site-header nav { margin-top: 15px; font-size: 13px; }
  main { padding: 12px; }
  .cards { grid-template-columns: 1fr 1fr; gap: 8px; }
  .cards > div { padding: 12px; }
  .cards b { font-size: 23px; }
  .target h2 { font-size: 22px; }
  .panel { padding: 14px; }
  .view-tabs { display: grid; grid-template-columns: 1fr; }
  .view-tabs button { min-height: 44px; }
  .action-queues { grid-template-columns: 1fr; gap: 10px; }
  .cockpit-heading { align-items: start; }
  .cockpit-heading h2 { font-size: 21px; }
  .cockpit-controls { display: grid; grid-template-columns: 1fr; }
  .mobile-stage-nav { display: flex; flex-direction: column; gap: 5px; margin: 14px 0; }
  #knowledge-map .map-table { min-width: 0; }
  #knowledge-map .map-row { grid-template-columns: 105px minmax(0, 1fr); }
  #knowledge-map .map-head { display: none; }
  #knowledge-map .stage-cell { display: none; }
  #knowledge-map[data-mobile-stage="foundations"] [data-stage="foundations"],
  #knowledge-map[data-mobile-stage="llm"] [data-stage="llm"],
  #knowledge-map[data-mobile-stage="langchain"] [data-stage="langchain"],
  #knowledge-map[data-mobile-stage="reliability"] [data-stage="reliability"],
  #knowledge-map[data-mobile-stage="production"] [data-stage="production"],
  #knowledge-map[data-mobile-stage="autonomy"] [data-stage="autonomy"] { display: flex; }
  .piece-tray { grid-template-columns: 1fr; }
  .game-board { padding: 22px 10px; }
  .shape.decision { transform: none; width: auto; height: auto; min-width: 150px; min-height: 95px; clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%); }
  .shape.decision > * { transform: none; }
  .arrow { flex-basis: 100%; text-align: center; transform: rotate(90deg); }
  .formgrid { grid-template-columns: 1fr; }
  dialog { padding: 16px; }
}