:root {
  --text: #172532;
  --muted: #5a6f82;
  --card: #ffffff;
  --border: #d7e1eb;
  --accent: #0a5d8f;
  --green: #0f7c43;
  --green-bg: #ddf4e7;
  --yellow: #8a6a00;
  --yellow-bg: #fff3cf;
  --red: #ac3a35;
  --red-bg: #fbe1df;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Avenir Next", "Segoe UI", sans-serif;
  color: var(--text);
  background: radial-gradient(circle at top right, #dce8f2 0%, #f4f7fb 52%, #edf2f7 100%);
}

.app-shell {
  max-width: 1160px;
  margin: 0 auto;
  padding: 1.4rem;
}

header h1 {
  margin: 0;
  font-size: 2rem;
}

header p {
  margin: 0.45rem 0 1.2rem;
  color: var(--muted);
}

.panel,
.summary,
.route-card,
.detail-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: 0 10px 26px rgba(7, 30, 48, 0.06);
}

.panel,
.summary,
.route-card,
.detail-card {
  padding: 0.95rem;
}

.planner-form {
  display: grid;
  gap: 0.85rem;
  grid-template-columns: 1fr;
  align-items: end;
}

@media (min-width: 760px) {
  .planner-form {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .planner-form {
    grid-template-columns: repeat(4, minmax(170px, 1fr));
  }

  .field-origin { grid-column: 1; }
  .field-date { grid-column: 2; }
  .field-type { grid-column: 3; }
  .field-time { grid-column: 4; }
  .field-distance { grid-column: 1 / span 2; }
  .field-approaches { grid-column: 3 / span 2; }
  .field-help { grid-column: 1 / span 2; }
  .form-actions { grid-column: 1 / -1; }
}

label {
  display: grid;
  gap: 0.35rem;
  font-weight: 600;
  font-size: 0.95rem;
}

.slider-label {
  min-width: 240px;
}

.approach-needs {
  border: 1px solid #d7e4ef;
  border-radius: 10px;
  padding: 0.65rem 0.75rem;
  background: #f8fbff;
}

.approach-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.4rem 0.7rem;
}

.approach-grid label {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-weight: 600;
  font-size: 0.9rem;
}

.approach-grid label input:disabled + span,
.approach-grid label:has(input:disabled) {
  opacity: 0.45;
}

.approach-needs.all-selected .approach-grid label {
  opacity: 0.45;
}

.approach-needs.all-selected .approach-grid label:first-child {
  opacity: 1;
}

.form-actions {
  grid-column: 1 / -1;
  display: flex;
  justify-content: center;
  margin-top: 0.25rem;
}

input,
select,
button {
  font: inherit;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.56rem 0.64rem;
  background: #fff;
}

#generate-btn {
  width: min(100%, 520px);
  min-width: 0;
}

button:disabled {
  opacity: 0.65;
  cursor: not-allowed;
}

input[type="range"] {
  padding: 0;
}

button {
  border: 0;
  color: #fff;
  background: linear-gradient(120deg, var(--accent), #0a759f);
  font-weight: 700;
  cursor: pointer;
}

button.secondary {
  background: #e8f0f7;
  color: #1b3d58;
  border: 1px solid #c6d8e8;
}

.status {
  margin-top: 1rem;
  padding: 0.8rem 1rem;
  border-radius: 10px;
  background: #eaf3fb;
  border: 1px solid #cddfee;
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.55rem;
}

.status.loading::before {
  content: "";
  width: 14px;
  height: 14px;
  border: 2px solid #9dc3de;
  border-top-color: #0a5d8f;
  border-radius: 999px;
  display: inline-block;
  animation: spin 0.85s linear infinite;
}

.status.error {
  color: var(--red);
  background: #fdeceb;
  border-color: #f2c8c6;
}

.note,
.subtle,
.small {
  color: var(--muted);
}

.note {
  margin: 0.8rem 0 0;
  font-size: 0.9rem;
}

.small {
  font-size: 0.87rem;
}

.results {
  margin-top: 1rem;
  display: grid;
  gap: 1rem;
}

.route-grid {
  display: grid;
  gap: 0.8rem;
}

.route-card-selected {
  border-color: #95b9d6;
  box-shadow: 0 12px 28px rgba(7, 43, 73, 0.12);
}

.route-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
}

.route-head h3 {
  margin: 0;
}

.route-score {
  min-width: 58px;
  text-align: center;
  border-radius: 10px;
  font-size: 1.1rem;
  font-weight: 800;
  padding: 0.4rem 0.45rem;
}

.score-green {
  color: var(--green);
  background: var(--green-bg);
}

.score-yellow {
  color: var(--yellow);
  background: var(--yellow-bg);
}

.score-red {
  color: var(--red);
  background: var(--red-bg);
}

.route-overview {
  margin: 0.7rem 0;
  display: grid;
  gap: 0.45rem;
}

.overview-row {
  border: 1px solid #e4ebf2;
  border-radius: 8px;
  padding: 0.55rem 0.6rem;
}

.overview-line {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-items: center;
}

.warning {
  color: #8b4a00;
}

.leg-list {
  margin-top: 0.55rem;
  display: grid;
  gap: 0.35rem;
}

.leg-row {
  display: flex;
  justify-content: space-between;
  gap: 0.8rem;
  padding: 0.45rem 0.6rem;
  border: 1px solid #e4ebf2;
  border-radius: 8px;
}

.detail-card {
  margin-top: 0.8rem;
}

.route-inline-detail {
  margin-top: 0.9rem;
  border-top: 1px solid #e2eaf2;
  padding-top: 0.9rem;
}

.route-inline-detail h3 {
  margin: 0 0 0.55rem;
}

.route-detail-shell {
  margin-bottom: 0.75rem;
}

.map-wrap {
  margin-top: 0.75rem;
}

.route-map {
  margin-top: 0.4rem;
  width: 100%;
  max-width: 100%;
  min-height: 260px;
  border-radius: 8px;
  border: 1px solid #d8e2ec;
  display: block;
}

.detail-card h4 {
  margin: 0;
}

.diagram-wrap {
  margin-top: 0.55rem;
}

.airfield-chip {
  border: 1px solid #d9e5f0;
  border-radius: 10px;
  padding: 0.55rem 0.6rem;
  background: #f9fcff;
  height: 100%;
}

.detail-card .card-body {
  padding: 0.75rem 0.85rem;
}

.airfield-mini-info {
  border: 1px solid #d9e5f0;
  border-radius: 10px;
  background: #f8fbff;
  padding: 0.6rem;
  height: 100%;
}

.runway-list-mini {
  margin: 0.2rem 0 0;
  padding-left: 1rem;
}

.detail-meta {
  margin: 0.5rem 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  align-items: center;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  display: inline-block;
}

.dot-green {
  background: var(--green);
}

.dot-yellow {
  background: var(--yellow);
}

.dot-red {
  background: var(--red);
}

.approaches {
  margin-top: 0.55rem;
}

.alt-approaches {
  margin-top: 0.45rem;
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

.approaches ul {
  margin: 0.35rem 0 0;
  padding-left: 1.1rem;
}

.approaches a {
  color: #0a6f59;
}

.detail-stack {
  display: grid;
  gap: 0.55rem;
}

.detail-collapsible,
.subsection {
  border: 1px solid #dce7f1;
  border-radius: 10px;
  background: #fbfdff;
  overflow: hidden;
}

.detail-collapsible > summary,
.subsection > summary {
  cursor: pointer;
  font-weight: 700;
  padding: 0.55rem 0.7rem;
  background: #f3f8fd;
  list-style: none;
}

.detail-collapsible > summary::-webkit-details-marker,
.subsection > summary::-webkit-details-marker {
  display: none;
}

.subsection > .approaches,
.subsection > .airfield-mini-info,
.subsection > .detail-footer {
  padding: 0.6rem 0.75rem 0.7rem;
}

.detail-footer {
  display: grid;
  gap: 0.35rem;
}

@media (max-width: 760px) {
  .route-head {
    flex-direction: column;
    align-items: flex-start;
  }

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

  .leg-row {
    flex-direction: column;
    gap: 0.2rem;
  }
}