:root {
  --ink: #1e2a27;
  --muted: #65716d;
  --panel: #fffdf7;
  --paper: #f5f3e9;
  --line: #d9ded7;
  --green: #176b58;
  --green-dark: #0d483a;
  --sky: #dbeaf0;
  --amber: #f3c867;
  --danger: #b23b3b;
  --shadow: 0 20px 60px rgba(25, 33, 31, 0.12);
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

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

button,
input,
select {
  font: inherit;
}

button {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  color: var(--ink);
  cursor: pointer;
  min-height: 42px;
  padding: 0 14px;
  transition:
    border-color 160ms ease,
    background 160ms ease,
    transform 160ms ease;
}

button:hover:not(:disabled) {
  border-color: var(--green);
  background: #f8fbf8;
}

button:active:not(:disabled) {
  transform: translateY(1px);
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.48;
}

input,
select,
.readonly-value {
  width: 100%;
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  color: var(--ink);
  padding: 0 12px;
}

.readonly-value {
  display: flex;
  align-items: center;
  color: var(--muted);
  font-weight: 750;
}

input:focus,
select:focus,
button:focus-visible {
  outline: 3px solid rgba(23, 107, 88, 0.18);
  outline-offset: 2px;
  border-color: var(--green);
}

label {
  display: block;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 750;
  letter-spacing: 0;
  margin-bottom: 8px;
  text-transform: uppercase;
}

.app-shell {
  display: grid;
  grid-template-columns: minmax(360px, 420px) minmax(0, 1fr);
  height: 100dvh;
  min-height: 680px;
}

.route-panel {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  gap: 18px;
  overflow-y: auto;
  border-right: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(219, 234, 240, 0.55), rgba(255, 253, 247, 0) 220px),
    var(--panel);
  padding: 26px;
  box-shadow: var(--shadow);
}

.brand-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.eyebrow {
  margin: 0 0 4px;
  color: var(--green);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 5vw, 3.1rem);
  line-height: 0.94;
  letter-spacing: 0;
}

.source-badge {
  flex: 0 0 auto;
  border: 1px solid rgba(23, 107, 88, 0.22);
  border-radius: 999px;
  background: rgba(23, 107, 88, 0.08);
  color: var(--green-dark);
  font-size: 0.78rem;
  font-weight: 800;
  padding: 8px 10px;
  white-space: nowrap;
}

.route-form {
  display: grid;
  gap: 18px;
}

.control-section {
  display: grid;
  gap: 10px;
}

.split-section {
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.input-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
  align-items: center;
}

.input-row.compact {
  grid-template-columns: 92px 1fr;
}

.unit-label {
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.2;
}

.action-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.closure-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.action-grid button,
.closure-grid button,
.export-row button {
  padding-inline: 8px;
}

.closure-grid .is-active {
  border-color: var(--danger);
  background: rgba(178, 59, 59, 0.1);
  color: var(--danger);
}

#addWaypointButton.is-active {
  border-color: var(--green);
  background: rgba(23, 107, 88, 0.1);
  color: var(--green-dark);
}

.waypoint-marker {
  display: grid;
  width: 28px;
  height: 28px;
  place-items: center;
  border: 2px solid #ffffff;
  border-radius: 999px;
  background: var(--green);
  box-shadow: 0 4px 12px rgba(30, 42, 39, 0.28);
  color: #ffffff;
  font-size: 0.82rem;
  font-weight: 850;
}

.segment-control {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 6px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  padding: 5px;
}

.segment-control input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.segment-control label {
  display: grid;
  min-height: 36px;
  place-items: center;
  border-radius: 6px;
  color: var(--ink);
  font-size: 0.95rem;
  font-weight: 800;
  margin: 0;
  text-transform: none;
  transition:
    background 160ms ease,
    color 160ms ease;
}

.segment-control input:checked + label {
  background: var(--green);
  color: #ffffff;
}

.checkbox-row {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  padding: 0 12px;
}

.checkbox-row input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.checkbox-row label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  color: var(--ink);
  font-size: 0.96rem;
  font-weight: 800;
  margin: 0;
  text-transform: none;
}

.checkbox-row label::after {
  content: "";
  flex: 0 0 auto;
  width: 36px;
  height: 20px;
  border-radius: 999px;
  background: #cfd8d5;
  box-shadow: inset 0 0 0 1px rgba(30, 42, 39, 0.08);
  transition:
    background 160ms ease,
    box-shadow 160ms ease;
}

.checkbox-row label::before {
  content: "";
  position: absolute;
  right: 28px;
  width: 16px;
  height: 16px;
  border-radius: 999px;
  background: #ffffff;
  box-shadow: 0 1px 4px rgba(30, 42, 39, 0.22);
  transition: transform 160ms ease;
}

.checkbox-row input:checked + label::after {
  background: var(--green);
}

.checkbox-row input:checked + label::before {
  transform: translateX(16px);
}

.checkbox-row input:focus-visible + label::after {
  box-shadow:
    inset 0 0 0 1px rgba(30, 42, 39, 0.08),
    0 0 0 3px rgba(23, 107, 88, 0.18);
}

.primary-action {
  min-height: 54px;
  border-color: var(--green-dark);
  background: var(--green);
  color: #ffffff;
  font-size: 1rem;
  font-weight: 850;
}

.primary-action:hover:not(:disabled) {
  background: var(--green-dark);
  color: #ffffff;
}

.route-readout {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.metric {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.72);
  padding: 12px;
}

.metric span {
  display: block;
  color: var(--muted);
  font-size: 0.74rem;
  font-weight: 750;
  letter-spacing: 0;
  text-transform: uppercase;
}

.metric strong {
  display: block;
  overflow-wrap: anywhere;
  margin-top: 4px;
  font-size: 1.08rem;
}

.export-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.status-line {
  min-height: 42px;
  border-left: 4px solid var(--amber);
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.35;
  margin: 0;
  padding: 0 0 0 12px;
}

.status-line.error {
  border-left-color: var(--danger);
  color: var(--danger);
}

.status-line.success {
  border-left-color: var(--green);
  color: var(--green-dark);
}

.map-shell {
  position: relative;
  min-width: 0;
  min-height: 0;
}

#map {
  height: 100%;
  width: 100%;
  background: var(--sky);
}

.leaflet-control-attribution {
  font-size: 0.68rem;
}

.leaflet-popup-content {
  color: var(--ink);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

@media (max-width: 900px) {
  .app-shell {
    grid-template-columns: 1fr;
    grid-template-rows: minmax(420px, 48dvh) minmax(360px, 1fr);
    min-height: 100dvh;
  }

  .route-panel {
    border-right: 0;
    border-bottom: 1px solid var(--line);
    padding: 20px;
  }

  h1 {
    font-size: 2.15rem;
  }
}

@media (max-width: 520px) {
  .route-panel {
    padding: 16px;
  }

  .brand-row,
  .split-section,
  .input-row,
  .export-row,
  .route-readout {
    grid-template-columns: 1fr;
  }

  .brand-row {
    display: grid;
  }

  .source-badge {
    justify-self: start;
  }

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

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

  .app-shell {
    grid-template-rows: minmax(520px, 58dvh) minmax(320px, 1fr);
  }
}