:root {
  color-scheme: light;
  --ink: #1c2330;
  --muted: #6a7280;
  --faint: #97a0ae;
  --paper: #f6f8fa;
  --panel: #ffffff;
  --line: #e1e7ee;
  --line-strong: #cdd6e0;
  --blue: #1989d6;
  --blue-deep: #0f6cab;
  --blue-soft: #e4f1fb;
  --rail: #142030;
  --amber: #c98321;
  --bad: #c0492f;
  --good: #2f8f63;
  --shadow: 0 22px 60px rgba(20, 32, 48, 0.14);
  --shadow-soft: 0 8px 22px rgba(20, 32, 48, 0.08);
  --radius: 16px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  height: 100%;
}

body {
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}

code {
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.85em;
  background: rgba(25, 137, 214, 0.1);
  color: var(--blue-deep);
  padding: 0.05em 0.4em;
  border-radius: 6px;
}

button {
  cursor: pointer;
  font: inherit;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.4;
}

/* ----------------------------------------------------------- shell */
.dv-shell {
  display: grid;
  grid-template-columns: 264px 1fr;
  min-width: 0;
  min-height: 100vh;
}

/* ------------------------------------------------------------- rail */
.dv-rail {
  background: var(--rail);
  color: #d7dee8;
  padding: 22px 20px 28px;
  display: flex;
  flex-direction: column;
  gap: 22px;
  position: sticky;
  top: 0;
  height: 100vh;
  min-width: 0;
}

.dv-back {
  color: #8fa9c4;
  text-decoration: none;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.01em;
}
.dv-back:hover {
  color: #c8e3f8;
}

.dv-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}
.dv-brand strong {
  display: block;
  font-size: 1.05rem;
  color: #fff;
  letter-spacing: -0.01em;
}
.dv-brand small {
  color: #8a94a3;
  font-size: 0.74rem;
}
.dv-dot {
  width: 34px;
  height: 34px;
  border-radius: 11px;
  background: linear-gradient(135deg, var(--blue), #4db4f5);
  box-shadow: 0 0 0 4px rgba(25, 137, 214, 0.18);
  flex: none;
}

.dv-chapters {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 3px;
  flex: 1;
  min-width: 0;
}
.dv-chapter {
  display: flex;
  gap: 12px;
  align-items: center;
  padding: 10px 12px;
  border-radius: 11px;
  color: #aab4c1;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  border: 1px solid transparent;
}
.dv-chapter:hover {
  background: rgba(255, 255, 255, 0.05);
  color: #e7edf4;
}
.dv-chapter.active {
  background: rgba(25, 137, 214, 0.16);
  border-color: rgba(25, 137, 214, 0.4);
  color: #fff;
}
.dv-chapter.done .dv-chapter-num {
  background: var(--blue);
  color: #fff;
  border-color: var(--blue);
}
.dv-chapter-num {
  width: 24px;
  height: 24px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  display: grid;
  place-items: center;
  font-size: 0.74rem;
  font-weight: 700;
  flex: none;
}
.dv-chapter.active .dv-chapter-num {
  background: var(--blue);
  border-color: var(--blue);
  color: #fff;
}
.dv-chapter-label {
  font-size: 0.84rem;
  font-weight: 600;
  line-height: 1.2;
}

.dv-rail-foot p {
  font-size: 0.74rem;
  color: #76808f;
  line-height: 1.5;
  margin: 0;
}

/* ------------------------------------------------------------- main */
.dv-main {
  padding: 26px 30px 30px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  max-width: 1240px;
  min-width: 0;
  width: 100%;
}

.dv-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
}
.dv-kicker {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--blue-deep);
  margin: 0 0 6px;
}
.dv-head h1 {
  margin: 0;
  font-size: 1.7rem;
  letter-spacing: -0.02em;
}
#chapterLede {
  margin: 8px 0 0;
  color: var(--muted);
  max-width: 60ch;
  line-height: 1.5;
}

.dv-head-stats {
  display: flex;
  gap: 10px;
  flex: none;
}
.dv-stat {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 8px 12px;
  text-align: center;
  min-width: 68px;
  box-shadow: var(--shadow-soft);
}
.dv-stat span {
  display: block;
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--faint);
  font-weight: 700;
  white-space: nowrap;
}
.dv-stat strong {
  font-size: 1.3rem;
  font-variant-numeric: tabular-nums;
}
.dv-stat.warn strong {
  color: var(--bad);
}

/* ------------------------------------------------------------ stage */
.dv-stage {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px 24px;
  display: grid;
  grid-template-columns: 180px minmax(150px, 1fr) minmax(270px, 1.1fr) 235px;
  gap: 18px;
  min-height: 360px;
  overflow: hidden;
}

.dv-station {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
}
.dv-station-title {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 700;
  color: var(--faint);
  display: flex;
  align-items: baseline;
  gap: 8px;
  flex-wrap: wrap;
}
.dv-station-sub {
  text-transform: none;
  letter-spacing: 0;
  font-weight: 500;
  color: var(--blue-deep);
}
.dv-dupcount {
  color: var(--bad);
}

/* ------- producer ------- */
.dv-card {
  background: linear-gradient(160deg, #ffffff, #f0f5fa);
  border: 1px solid var(--line-strong);
  border-radius: 14px;
  padding: 14px;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 4px;
  box-shadow: var(--shadow-soft);
}
.dv-card-glyph {
  align-self: center;
  border: 2px solid var(--blue);
  border-radius: 5px;
  color: var(--blue-deep);
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.54rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  padding: 5px 8px 4px;
  position: relative;
}
.dv-card-glyph::before {
  background: var(--blue);
  content: "";
  height: 3px;
  left: 0;
  position: absolute;
  right: 0;
  top: 4px;
}
.dv-card strong {
  font-size: 0.9rem;
}
.dv-card small {
  color: var(--muted);
  font-size: 0.72rem;
}

.dv-chip {
  display: inline-grid;
  place-items: center;
  min-width: 20px;
  height: 20px;
  padding: 0 3px;
  border-radius: 6px;
  background: var(--pc, #9fb0c7);
  color: #fff;
  font-style: normal;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.66rem;
  font-weight: 700;
  box-shadow: inset 0 -3px 0 rgba(0, 0, 0, 0.12);
  flex: none;
}
.dv-chip.dead {
  opacity: 0.45;
  filter: grayscale(0.6);
}

.dv-outbox {
  display: flex;
  flex-direction: column;
  gap: 5px;
  max-height: 165px;
  overflow: hidden;
}
.dv-pending {
  display: flex;
  align-items: center;
  gap: 7px;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 9px;
  padding: 4px 8px;
  font-size: 0.74rem;
}
.dv-pending-amt {
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}
.dv-pending-try {
  color: var(--amber);
  font-weight: 700;
  font-size: 0.66rem;
}
.dv-pending-timer {
  margin-left: auto;
  color: var(--muted);
  font-family: "JetBrains Mono", monospace;
  font-size: 0.68rem;
  font-variant-numeric: tabular-nums;
}
.dv-outbox-empty {
  font-size: 0.72rem;
  color: var(--faint);
  border: 1px dashed var(--line);
  border-radius: 9px;
  padding: 7px 9px;
  line-height: 1.4;
}

.dv-lostbox {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.dv-lost-head {
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
  color: var(--bad);
}
.dv-lost-row {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 0.72rem;
  color: var(--muted);
  text-decoration: line-through;
}
.dv-lost-more {
  font-size: 0.68rem;
  color: var(--faint);
}

/* ------- the network (wires) ------- */
.dv-wire {
  display: flex;
  flex-direction: column;
  gap: 14px;
  justify-content: center;
  min-width: 0;
}
.dv-wire .dv-station-title {
  justify-content: center;
}
.dv-wire-lane {
  position: relative;
  height: 44px;
  border-radius: 10px;
  border: 1px dashed var(--line-strong);
  background:
    linear-gradient(var(--paper), var(--paper)) padding-box;
}
.dv-wire-lane::before {
  content: "";
  position: absolute;
  left: 10px;
  right: 10px;
  top: 50%;
  border-top: 2px dotted var(--line-strong);
}
.dv-wire-tag {
  position: absolute;
  top: -16px;
  left: 8px;
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--faint);
}
.dv-wire-lane.ack .dv-wire-tag {
  left: auto;
  right: 8px;
}

.dv-token {
  position: absolute;
  top: 50%;
  margin-top: -11px;
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  border-radius: 7px;
  background: var(--pc, #9fb0c7);
  color: #fff;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.62rem;
  font-weight: 700;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.25);
  transition-property: left, transform;
  transition-timing-function: linear;
  translate: var(--flight-x, 0) var(--flight-y, 0);
  z-index: 2;
}
.dv-token.ack {
  width: 18px;
  height: 18px;
  margin-top: -9px;
  border-radius: 50%;
  background: #fff;
  color: var(--pc, var(--blue));
  border: 2px solid var(--pc, var(--blue));
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.15);
  font-size: 0.6rem;
}
.dv-dropfx {
  position: absolute;
  top: 50%;
  margin-top: -10px;
  font-size: 1rem;
  font-weight: 900;
  z-index: 3;
  animation: dvDrop 0.85s ease forwards;
}

/* ------- broker log ------- */
.dv-broker {
  justify-content: center;
}
.dv-log {
  display: flex;
  align-items: center;
  gap: 4px;
  background: repeating-linear-gradient(90deg, #f4f7fa, #f4f7fa 7px, #eef3f7 7px, #eef3f7 8px);
  border: 1px solid var(--line);
  border-radius: 10px;
  min-height: 40px;
  padding: 0 8px;
  overflow: hidden;
}
.dv-log-more {
  font-size: 0.62rem;
  font-weight: 700;
  color: var(--faint);
  font-family: "JetBrains Mono", monospace;
  flex: none;
}
.dv-rec {
  width: 22px;
  height: 26px;
  display: grid;
  place-items: center;
  border-radius: 6px;
  flex: none;
  font-style: normal;
  background: var(--pc, #9fb0c7);
  color: #fff;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.62rem;
  font-weight: 700;
  box-shadow: inset 0 -3px 0 rgba(0, 0, 0, 0.12);
  transition: opacity 0.3s, filter 0.3s;
}
.dv-rec.consumed {
  opacity: 0.3;
  filter: grayscale(0.5);
}
.dv-rec.dup {
  box-shadow: 0 0 0 2.5px var(--bad), inset 0 -3px 0 rgba(0, 0, 0, 0.12);
}
.dv-rec.fresh {
  animation: dvSlideIn 0.45s cubic-bezier(0.2, 0.8, 0.3, 1);
}
.dv-head-bar {
  width: 3px;
  height: 30px;
  flex: none;
  background: var(--blue);
  border-radius: 2px;
  margin: 0 3px;
  box-shadow: 0 0 0 2px rgba(25, 137, 214, 0.18);
  position: relative;
  z-index: 3;
}
.dv-head-bar::after {
  content: "▾";
  position: absolute;
  top: -13px;
  left: -4px;
  font-size: 0.62rem;
  color: var(--blue-deep);
}

/* ------- consumer + ledger column ------- */
.dv-consumer {
  justify-content: center;
}
.dv-consumer-off {
  color: var(--faint);
  font-size: 0.8rem;
  line-height: 1.5;
  padding: 14px;
  border: 1px dashed var(--line);
  border-radius: 12px;
}
.dv-consumer-on-wrap {
  display: none;
  flex-direction: column;
  gap: 10px;
}
.dv-stage.consumer-on .dv-consumer-off {
  display: none;
}
.dv-stage.consumer-on .dv-consumer-on-wrap {
  display: flex;
}

.dv-workerbox {
  border: 1.5px solid var(--blue);
  border-radius: 13px;
  padding: 10px 11px;
  background: color-mix(in srgb, var(--blue) 6%, #fff);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.dv-workerbox.down {
  background: #fdf0ec;
  border-color: var(--bad);
}
.dv-worker-status {
  font-size: 0.78rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}
.dv-worker-status.down,
.dv-worker-dead {
  color: var(--bad);
}
.dv-worker-steps {
  display: flex;
  align-items: center;
  gap: 5px;
  flex-wrap: wrap;
}
.dv-step {
  font-size: 0.64rem;
  font-weight: 700;
  font-family: "JetBrains Mono", monospace;
  border: 1px solid var(--line-strong);
  border-radius: 7px;
  padding: 3px 7px;
  color: var(--muted);
  background: #fff;
  transition: border-color 0.2s, color 0.2s, background 0.2s;
}
.dv-step.live {
  border-color: var(--blue);
  color: var(--blue-deep);
  background: var(--blue-soft);
}
.dv-step.done {
  border-color: var(--good);
  color: var(--good);
}
.dv-step-arrow {
  color: var(--faint);
  font-size: 0.7rem;
}

.dv-ledger-title {
  margin-top: 4px;
}
.dv-ledgerbox {
  display: flex;
  flex-direction: column;
  gap: 4px;
  max-height: 230px;
  overflow: hidden;
}
.dv-entry {
  display: flex;
  align-items: center;
  gap: 7px;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 9px;
  padding: 4px 8px;
  font-size: 0.74rem;
}
.dv-entry span {
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}
.dv-entry b {
  margin-left: auto;
  font-size: 0.62rem;
  color: var(--good);
  font-family: "JetBrains Mono", monospace;
}
.dv-entry.double {
  border-color: var(--bad);
  background: #fdf0ec;
}
.dv-entry.double b {
  color: var(--bad);
}
.dv-entry.missing {
  border-style: dashed;
  border-color: var(--bad);
  opacity: 0.8;
}
.dv-entry.missing b {
  color: var(--bad);
}
.dv-ledger-empty {
  font-size: 0.72rem;
  color: var(--faint);
  border: 1px dashed var(--line);
  border-radius: 9px;
  padding: 7px 9px;
}

/* ------------------------------------------------------------- deck */
.dv-deck {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 16px;
  align-items: start;
}
.dv-controls-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.dv-controls {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.dv-control-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}
.dv-btn {
  border: 1px solid var(--line-strong);
  background: #fff;
  border-radius: 10px;
  padding: 8px 14px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  gap: 7px;
  transition: background 0.15s, border-color 0.15s, transform 0.08s;
}
.dv-btn:hover:not(:disabled) {
  border-color: var(--blue);
  background: var(--blue-soft);
}
.dv-btn:active:not(:disabled) {
  transform: translateY(1px);
}
.dv-btn.primary {
  background: var(--blue);
  border-color: var(--blue);
  color: #fff;
}
.dv-btn.primary:hover:not(:disabled) {
  background: var(--blue-deep);
}
.dv-btn.on {
  background: var(--amber);
  border-color: var(--amber);
  color: #fff;
}

.dv-transport {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  padding: 10px 12px;
  background: var(--rail);
  border-radius: 12px;
}
.dv-transport .dv-btn {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.16);
  color: #eaf0f5;
}
.dv-transport .dv-btn:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.16);
  border-color: var(--blue);
}
.dv-transport .dv-btn.primary {
  background: var(--blue);
  border-color: var(--blue);
  color: #fff;
}
.dv-transport .dv-btn.on {
  background: var(--amber);
  border-color: var(--amber);
  color: #fff;
}
.dv-speeddial {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}
.dv-speed-btn {
  width: 32px;
  padding: 6px 0;
  justify-content: center;
  font-size: 1rem;
  font-weight: 700;
}
.dv-speed-readout {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 52px;
  line-height: 1.05;
}
.dv-speed-readout small {
  font-size: 0.58rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #8e9ca9;
}
.dv-speed-readout b {
  color: #eaf0f5;
  font-variant-numeric: tabular-nums;
  font-size: 0.92rem;
}

.dv-keychips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.dv-keychip {
  border: 1px solid var(--line-strong);
  background: #fff;
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 0.74rem;
  font-family: "JetBrains Mono", monospace;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.dv-keychip .swatch {
  width: 10px;
  height: 10px;
  border-radius: 3px;
}
.dv-keychip:hover {
  border-color: var(--blue);
}
.dv-chiplabel {
  align-self: center;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--faint);
  margin-right: 2px;
}

.dv-slider {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 180px;
}
.dv-slider-head {
  display: flex;
  justify-content: space-between;
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--muted);
}
.dv-slider-head b {
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}
.dv-slider input[type="range"] {
  width: 100%;
  accent-color: var(--blue);
}
.dv-control-note {
  font-size: 0.76rem;
  color: var(--muted);
  line-height: 1.5;
  margin: 0;
}

/* ------- event narration ------- */
.dv-event {
  border: 1px solid var(--line-strong);
  border-left: 4px solid var(--blue);
  background: linear-gradient(180deg, #f3f9fe, #fcfeff);
  border-radius: 12px;
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 7px;
  animation: dvRise 0.22s cubic-bezier(0.2, 0.8, 0.3, 1);
}
.dv-event-head {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.dv-event-badge {
  background: var(--blue);
  color: #fff;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: 3px 9px;
  border-radius: 999px;
  white-space: nowrap;
}
.dv-event-head strong {
  font-size: 0.86rem;
}
.dv-event-note {
  margin: 0;
  font-size: 0.78rem;
  color: var(--ink);
  line-height: 1.45;
}
.dv-event.warn {
  border-color: #f0d39a;
  border-left-color: var(--amber);
  background: linear-gradient(180deg, #fff8ec, #fffdf8);
}
.dv-event.warn .dv-event-badge {
  background: var(--amber);
}
.dv-event.bad {
  border-color: #ecc4b8;
  border-left-color: var(--bad);
  background: linear-gradient(180deg, #fdf1ed, #fffaf8);
}
.dv-event.bad .dv-event-badge {
  background: var(--bad);
}
.dv-event.good {
  border-color: #bcdfce;
  border-left-color: var(--good);
  background: linear-gradient(180deg, #effaf4, #fbfffd);
}
.dv-event.good .dv-event-badge {
  background: var(--good);
}

/* ------- explainer ------- */
.dv-explainer {
  background: linear-gradient(165deg, #ffffff, #f1f6fb);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.dv-explainer h3 {
  margin: 0;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--blue-deep);
}
.dv-explainer ul {
  margin: 0;
  padding-left: 18px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.dv-explainer li {
  font-size: 0.86rem;
  line-height: 1.5;
  color: var(--ink);
}
.dv-keyidea {
  background: var(--rail);
  color: #e7edf4;
  border-radius: 11px;
  padding: 11px 13px;
  font-size: 0.82rem;
  line-height: 1.5;
}
.dv-keyidea b {
  color: #6cc6ff;
}
.dv-callout {
  font-size: 0.82rem;
  color: var(--ink);
  background: #fff6e8;
  border: 1px solid #f0d39a;
  border-left: 4px solid var(--amber);
  border-radius: 10px;
  padding: 10px 12px;
  line-height: 1.5;
}
.dv-callout b {
  color: var(--amber);
}
.dv-try {
  font-size: 0.82rem;
  color: var(--ink);
  background: var(--blue-soft);
  border: 1px dashed var(--blue);
  border-radius: 11px;
  padding: 10px 12px;
  line-height: 1.5;
}
.dv-try b {
  color: var(--blue-deep);
}

/* ------------------------------------------------------------- foot */
.dv-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.dv-nav {
  border: 1px solid var(--line-strong);
  background: #fff;
  border-radius: 11px;
  padding: 10px 18px;
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--ink);
}
.dv-nav:hover:not(:disabled) {
  border-color: var(--blue);
}
.dv-nav-primary {
  background: var(--blue);
  border-color: var(--blue);
  color: #fff;
}
.dv-nav-primary:hover {
  background: var(--blue-deep);
}
.dv-progress {
  display: flex;
  gap: 7px;
}
.dv-pdot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--line-strong);
  cursor: pointer;
  transition: background 0.15s, transform 0.15s;
}
.dv-pdot.active {
  background: var(--blue);
  transform: scale(1.3);
}
.dv-pdot.done {
  background: var(--blue-deep);
}

/* ----------------------------------------------------- animations */
@keyframes dvSlideIn {
  from {
    transform: translateX(-22px) scale(0.6);
    opacity: 0;
  }
  to {
    transform: translateX(0) scale(1);
    opacity: 1;
  }
}
@keyframes dvRise {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
@keyframes dvDrop {
  0% {
    opacity: 1;
    transform: translateY(0) rotate(0deg);
  }
  100% {
    opacity: 0;
    transform: translateY(26px) rotate(40deg);
  }
}

@media (max-width: 1080px) {
  .dv-shell {
    grid-template-columns: 1fr;
  }
  .dv-rail {
    position: static;
    height: auto;
  }
  .dv-chapters {
    flex-direction: row;
    overflow-x: auto;
  }
  .dv-chapter {
    flex: none;
  }
  .dv-deck {
    grid-template-columns: 1fr;
  }
  .dv-stage {
    grid-template-columns: 150px minmax(120px, 1fr) minmax(220px, 1fr) 210px;
    gap: 12px;
  }
}

@media (max-width: 900px) {
  .dv-rail {
    gap: 16px;
    padding: 16px 14px;
  }
  .dv-rail-foot {
    display: none;
  }
  .dv-main {
    gap: 14px;
    padding: 18px 14px 24px;
  }
  .dv-head {
    flex-direction: column;
    gap: 14px;
  }
  .dv-head h1 {
    font-size: 1.5rem;
  }
  .dv-head-stats {
    max-width: 100%;
    overflow-x: auto;
    padding-bottom: 4px;
    width: 100%;
  }
  .dv-stat {
    flex: 1 0 68px;
  }
  .dv-stage {
    grid-template-columns: minmax(0, 1fr);
    min-height: 0;
    padding: 16px;
  }
  .dv-wire {
    min-height: 118px;
  }
  .dv-broker,
  .dv-consumer {
    justify-content: flex-start;
  }
  .dv-controls-card,
  .dv-explainer {
    padding: 14px;
  }
  .dv-transport {
    align-items: stretch;
    flex-direction: column;
  }
  .dv-speeddial {
    margin-left: 0;
  }
  .dv-speed-readout {
    flex: 1;
  }
  .dv-foot {
    gap: 10px;
  }
  .dv-nav {
    padding: 9px 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .dv-rec.fresh,
  .dv-token,
  .dv-dropfx,
  .dv-pending,
  .dv-entry,
  .dv-event {
    animation: none !important;
    transition: none !important;
  }
}