.navigation-sheet[hidden], .route-sheet[hidden] { display: none; }

.navigation-sheet, .route-sheet {
  position: fixed;
  z-index: 60;
  inset: 0;
  display: grid;
  place-items: end center;
  padding: 18px;
}

.navigation-backdrop, .route-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(22,39,32,0.58);
  backdrop-filter: blur(5px);
}

.navigation-dialog, .route-dialog {
  position: relative;
  z-index: 1;
  width: min(520px, 100%);
  max-height: min(720px, calc(100dvh - 36px));
  overflow-y: auto;
  padding: 22px;
  border: 1px solid rgba(255,255,255,0.8);
  border-radius: 24px;
  background: rgba(245,247,242,0.98);
  box-shadow: 0 30px 80px rgba(0,0,0,0.3);
  animation: modal-rise 220ms ease-out both;
}

.navigation-heading, .route-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
}

.navigation-heading p, .route-heading p {
  margin: 0 0 3px;
  color: var(--brick);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.navigation-heading h2, .route-heading h2 {
  margin: 0;
  font-family: STKaiti, KaiTi, "Microsoft YaHei", sans-serif;
  font-size: 1.45rem;
}

.navigation-heading > button, .route-heading > button {
  width: 38px;
  height: 38px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  color: white;
  background: var(--moss-dark);
  font-size: 1.45rem;
  cursor: pointer;
}

body.navigation-open, body.route-sheet-open { overflow: hidden; }

@media (max-width: 720px) {
  .navigation-sheet, .route-sheet { padding: 0; }
  .navigation-dialog, .route-dialog {
    width: 100%;
    max-height: 86dvh;
    padding: 19px 16px calc(16px + env(safe-area-inset-bottom));
    border-width: 1px 0 0;
    border-radius: 24px 24px 0 0;
  }
  .navigation-dialog::before, .route-dialog::before {
    content: "";
    display: block;
    width: 42px;
    height: 4px;
    margin: -10px auto 10px;
    border-radius: 999px;
    background: rgba(36,52,47,0.22);
  }
}