:root {
  color-scheme: light;
  --ink: #172126;
  --muted: #5a6870;
  --line: #d8e0e4;
  --paper: #f6f8f5;
  --panel: #ffffff;
  --accent: #0b6b57;
  --accent-2: #9d3f2d;
  --accent-3: #315f9f;
  --warn: #b56b00;
  --shadow: 0 10px 30px rgba(23, 33, 38, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--ink);
  background: var(--paper);
}

.app-header {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: center;
  padding: 28px clamp(18px, 4vw, 48px);
  border-bottom: 1px solid var(--line);
  background: #fff;
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 0;
  font-size: clamp(28px, 4vw, 44px);
  letter-spacing: 0;
}

h2 {
  font-size: 20px;
}

h3 {
  margin: 22px 0 8px;
  font-size: 15px;
  text-transform: uppercase;
}

.step-meter {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 96px;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  background: #fdfdfb;
  font-weight: 700;
}

.layout {
  display: grid;
  grid-template-columns: minmax(280px, 340px) minmax(420px, 1fr) minmax(320px, 420px);
  gap: 18px;
  align-items: start;
  padding: 22px clamp(18px, 4vw, 48px) 40px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px;
}

label {
  display: block;
  margin-bottom: 16px;
  font-size: 13px;
  font-weight: 700;
  color: var(--muted);
}

select {
  display: block;
  width: 100%;
  margin-top: 7px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
  font: inherit;
}

.button-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 8px;
}

button {
  min-height: 42px;
  border: 1px solid var(--accent);
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

button:disabled {
  border-color: #c8d0d4;
  background: #dfe5e8;
  color: #71808a;
  cursor: not-allowed;
}

.step-nav {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.step-nav h2 {
  margin-bottom: 12px;
}

.step-nav ol {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.step-nav button {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 10px;
  align-items: center;
  width: 100%;
  min-height: 44px;
  border-color: var(--line);
  background: #fbfcfa;
  color: var(--ink);
  text-align: left;
}

.step-nav button:hover,
.step-nav button[aria-current="step"] {
  border-color: var(--accent);
  background: #eaf5f1;
}

.step-index {
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--ink);
  color: #fff;
  font-size: 12px;
  font-weight: 800;
}

.step-nav button[aria-current="step"] .step-index {
  background: var(--accent);
}

.stage {
  display: flex;
  flex-direction: column;
  min-height: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    linear-gradient(90deg, rgba(11, 107, 87, 0.08), transparent 30%, transparent 70%, rgba(157, 63, 45, 0.08)),
    #fff;
  padding: 22px;
  overflow: auto;
  box-shadow: var(--shadow);
}

.stage-heading {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
}

.stage-heading h2 {
  margin: 0;
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

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

.legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.goods-dot {
  background: var(--accent);
}

.docs-dot {
  background: var(--accent-3);
}

.money-dot {
  background: var(--accent-2);
}

.flow-map {
  display: grid;
  gap: 18px;
  min-width: 680px;
  margin-top: 18px;
}

.flow-track {
  display: grid;
  grid-template-columns: 150px minmax(470px, 1fr);
  gap: 22px;
  align-items: center;
  min-height: 158px;
  border-top: 1px solid var(--line);
  padding-top: 18px;
}

.flow-track:first-child {
  border-top: 0;
  padding-top: 0;
}

.track-copy h3 {
  margin: 0 0 8px;
  color: var(--ink);
  font-size: 14px;
  text-transform: uppercase;
}

.track-copy p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.4;
}

.route {
  position: relative;
  min-height: 132px;
}

.route-line {
  position: absolute;
  left: 42px;
  right: 42px;
  top: 82%;
  height: 3px;
  transform: translateY(-50%);
  background: #cad6dc;
}

.route-line::after {
  content: "";
  position: absolute;
  right: -1px;
  top: 50%;
  width: 10px;
  height: 10px;
  border-top: 3px solid #cad6dc;
  border-right: 3px solid #cad6dc;
  transform: translateY(-50%) rotate(45deg);
}

.money-track .route-line::after {
  left: -1px;
  right: auto;
  transform: translateY(-50%) rotate(225deg);
}

.route-node {
  position: absolute;
  top: 34%;
  z-index: 1;
  display: grid;
  align-content: center;
  justify-items: center;
  width: 112px;
  min-height: 74px;
  transform: translate(-50%, -50%);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: var(--shadow);
}

.node-start {
  left: 42px;
}

.node-quarter {
  left: calc(42px + (100% - 84px) * 0.25);
}

.node-middle {
  left: 50%;
}

.node-three-quarter {
  left: calc(42px + (100% - 84px) * 0.75);
}

.node-end {
  left: calc(100% - 42px);
}

.actor-label {
  font-weight: 800;
  text-align: center;
}

.badge {
  margin-top: 8px;
  min-width: 58px;
  border-radius: 999px;
  padding: 4px 8px;
  background: #e6f4ef;
  color: var(--accent);
  text-align: center;
  font-size: 12px;
  font-weight: 800;
}

.badge.muted {
  background: #eef1f3;
  color: var(--muted);
}

.route-notice {
  position: absolute;
  top: 82%;
  left: 50%;
  z-index: 3;
  display: none;
  border: 1px solid #d4dbe0;
  border-radius: 999px;
  padding: 8px 12px;
  transform: translate(-50%, -50%);
  background: #fff;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
  white-space: nowrap;
}

.docs-track.docs-missing .route-line {
  background: repeating-linear-gradient(90deg, #cad6dc 0, #cad6dc 8px, transparent 8px, transparent 15px);
}

.docs-track.docs-missing .route-notice {
  display: block;
}

.docs-track.docs-missing .marker {
  display: none;
}

.docs-track.docs-missing .route-node {
  opacity: 0.55;
}

.marker {
  position: absolute;
  left: calc(42px + (100% - 84px) * var(--progress, 0));
  top: 82%;
  z-index: 2;
  width: 74px;
  height: 34px;
  transform: translate(-50%, -50%);
  display: grid;
  place-items: center;
  border-radius: 999px;
  color: #fff;
  font-size: 12px;
  font-weight: 800;
  transition: left 220ms ease;
}

.goods {
  background: var(--accent);
}

.docs {
  background: var(--accent-3);
}

.money {
  background: var(--accent-2);
}

.status-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.status-grid div {
  min-height: 78px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  background: #fbfcfa;
}

.label {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

.result p {
  line-height: 1.5;
}

@media (max-width: 1050px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .stage {
    min-height: 0;
  }

  .step-nav ol {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 620px) {
  .app-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .stage {
    min-height: 0;
    padding: 18px;
  }

  .stage-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .flow-map {
    min-width: 560px;
  }

  .step-nav ol {
    grid-template-columns: 1fr;
  }

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