:root {
  --hydro-motion-fast: 140ms;
  --hydro-motion-base: 220ms;
  --hydro-motion-layout: 280ms;
  --hydro-motion-exit: 170ms;
  --hydro-motion-ease: cubic-bezier(0.25, 1, 0.5, 1);
  --hydro-motion-ease-strong: cubic-bezier(0.22, 1, 0.36, 1);
}

@view-transition {
  navigation: none;
}

::view-transition-old(root) {
  animation: hydro-view-leave 170ms ease-in both;
}

::view-transition-new(root) {
  animation: hydro-view-enter 260ms var(--hydro-motion-ease-strong) both;
}

::view-transition-group(*) {
  animation-duration: 280ms;
  animation-timing-function: var(--hydro-motion-ease-strong);
}

.landing-header > .brand,
.sluice-topbar > .sluice-brand,
.topbar > .brand,
#sidebar .sidebar-head > .brand,
.legal-header > .legal-brand {
  view-transition-name: hydroliber-brand;
}

:is(.workflow-sidebar, .engineering-navigation) > a[href="/calculations/hydrology"] { view-transition-name: workbench-hydrology; }
:is(.workflow-sidebar, .engineering-navigation) > a[href="/calculations/sluice"] { view-transition-name: workbench-sluice; }
:is(.workflow-sidebar, .engineering-navigation) > a[href="/calculations/concrete"] { view-transition-name: workbench-concrete; }
:is(.workflow-sidebar, .engineering-navigation) > a[href="/calculations/visualization"] { view-transition-name: workbench-visualization; }

html.motion-view-changing .route-transition {
  animation: none;
}

:is(.calculation-link, .sluice-top-actions a, .engineering-navigation a, .topbar nav a, .legal-back, .calculation-mode a) {
  transition: color 140ms ease-out, background-color 140ms ease-out, border-color 140ms ease-out, transform 170ms var(--hydro-motion-ease);
}

:is(.calculation-link, .sluice-top-actions a, .engineering-navigation a, .topbar nav a, .legal-back, .calculation-mode a):hover {
  transform: translateY(-1px);
}

:is(.calculation-link, .sluice-top-actions a, .engineering-navigation a, .topbar nav a, .legal-back, .calculation-mode a):active {
  transform: scale(.98);
}

@keyframes hydro-view-leave {
  to { opacity: 0; transform: translateY(-4px); }
}

@keyframes hydro-view-enter {
  from { opacity: 0; transform: translateY(7px); }
  to { opacity: 1; transform: translateY(0); }
}

html.motion-route-arriving body {
  animation: hydro-manual-route-arrive 360ms var(--hydro-motion-ease-strong) both;
}

.nav-primary,
.candidate-home {
  transition:
    color var(--hydro-motion-fast) var(--hydro-motion-ease),
    border-color var(--hydro-motion-fast) var(--hydro-motion-ease),
    background-color var(--hydro-motion-fast) var(--hydro-motion-ease),
    box-shadow var(--hydro-motion-fast) var(--hydro-motion-ease),
    transform var(--hydro-motion-fast) var(--hydro-motion-ease);
}

.nav-primary:active,
.candidate-home:active {
  transform: translateY(1px) scale(0.97);
}

/* Menus and compact floating controls */
.profile-menu,
.history-menu {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(7px) scale(0.985);
  transform-origin: var(--motion-origin, top right);
  transition:
    opacity var(--hydro-motion-fast) var(--hydro-motion-ease),
    transform var(--hydro-motion-base) var(--hydro-motion-ease),
    visibility 0s var(--hydro-motion-exit);
}

.profile-menu.motion-open,
.history-menu.motion-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0) scale(1);
  transition-delay: 0s;
}

/* Centered overlays and bottom sheets */
.account-overlay,
.citation-modal {
  display: flex;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition:
    opacity var(--hydro-motion-base) var(--hydro-motion-ease),
    visibility 0s var(--hydro-motion-exit);
}

.account-overlay.open,
.citation-modal.open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transition-delay: 0s;
}

.account-overlay > *,
.citation-modal-card {
  opacity: 0;
  transform: translateY(13px) scale(0.985);
  transition:
    opacity var(--hydro-motion-fast) var(--hydro-motion-ease),
    transform var(--hydro-motion-layout) var(--hydro-motion-ease-strong);
}

.account-overlay.open > *,
.citation-modal.open .citation-modal-card {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.history-dialog,
.image-viewer,
.wallet-payment-overlay {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition:
    opacity var(--hydro-motion-base) var(--hydro-motion-ease),
    visibility 0s var(--hydro-motion-exit);
}

.history-dialog.motion-open,
.image-viewer.motion-open,
.wallet-payment-overlay.motion-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transition-delay: 0s;
}

.history-dialog-card,
.image-viewer > img,
.image-viewer > .temporary-file-viewer-panel,
.image-viewer > .diagram-viewer-panel,
.wallet-payment-dialog {
  opacity: 0;
  transform: translateY(13px) scale(0.985);
  transition:
    opacity var(--hydro-motion-fast) var(--hydro-motion-ease),
    transform var(--hydro-motion-layout) var(--hydro-motion-ease-strong);
}

.history-dialog.motion-open .history-dialog-card,
.image-viewer.motion-open > img,
.image-viewer.motion-open > .temporary-file-viewer-panel,
.image-viewer.motion-open > .diagram-viewer-panel,
.wallet-payment-overlay.motion-open .wallet-payment-dialog {
  opacity: 1;
  transform: translateY(0) scale(1);
}

/* Native management dialog */
.recharge-detail-dialog {
  opacity: 0;
  transform: translateY(13px) scale(0.985);
  transition:
    opacity var(--hydro-motion-fast) var(--hydro-motion-ease),
    transform var(--hydro-motion-layout) var(--hydro-motion-ease-strong),
    display var(--hydro-motion-exit) allow-discrete,
    overlay var(--hydro-motion-exit) allow-discrete;
}

.recharge-detail-dialog.motion-open {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.recharge-detail-dialog::backdrop {
  background: transparent;
  transition:
    background-color var(--hydro-motion-base) var(--hydro-motion-ease),
    display var(--hydro-motion-exit) allow-discrete,
    overlay var(--hydro-motion-exit) allow-discrete;
}

.recharge-detail-dialog.motion-open::backdrop {
  background: #1c294766;
}

.login-overlay.motion-closing {
  animation: hydro-overlay-exit var(--hydro-motion-exit) ease-in both;
  pointer-events: none;
}

.login-overlay.motion-closing > .login-dialog,
.login-overlay.motion-closing > .feedback-dialog {
  animation: hydro-dialog-exit var(--hydro-motion-exit) ease-in both;
}

/* Content and attachment feedback */
.motion-content-enter {
  animation: hydro-content-enter var(--hydro-motion-base) var(--hydro-motion-ease) both;
}

.pending-upload-item,
.message-attachment,
.feedback-file-row,
.inline-result,
.tender-package-panel,
.temporary-materials,
.candidate-result-actions,
.candidate-result-empty {
  animation: hydro-item-enter var(--hydro-motion-base) var(--hydro-motion-ease) both;
}

.candidate-result-preview iframe {
  animation: hydro-content-enter var(--hydro-motion-layout) var(--hydro-motion-ease) both;
}

.admin-page [data-view-panel].motion-content-enter,
.admin-page #adminContent.motion-content-enter,
.admin-page #authGate.motion-content-enter {
  animation-duration: var(--hydro-motion-layout);
}

.pending-upload-item.motion-removing,
.feedback-file-row.motion-removing {
  opacity: 0;
  transform: translateY(-4px) scale(0.985);
  transition:
    opacity var(--hydro-motion-fast) var(--hydro-motion-ease),
    transform var(--hydro-motion-exit) var(--hydro-motion-ease);
}

.pending-upload-item,
.message-attachment,
.feedback-file-row,
.temporary-file,
.citation-page,
.tender-package-options button {
  transition:
    border-color var(--hydro-motion-fast) var(--hydro-motion-ease),
    background-color var(--hydro-motion-fast) var(--hydro-motion-ease),
    color var(--hydro-motion-fast) var(--hydro-motion-ease),
    opacity var(--hydro-motion-fast) var(--hydro-motion-ease),
    transform var(--hydro-motion-fast) var(--hydro-motion-ease);
}

.message-attachment:hover,
.pending-upload-item:hover,
.temporary-file:hover,
.tender-package-options button:not(:disabled):hover {
  transform: translateY(-1px);
}

.message-attachment:active,
.pending-upload-item:active,
.tender-package-options button:not(:disabled):active {
  transform: translateY(0) scale(0.985);
}

.citation-page img,
.temporary-file-viewer-body img,
.diagram-viewer img {
  transition:
    opacity var(--hydro-motion-base) var(--hydro-motion-ease),
    transform var(--hydro-motion-layout) var(--hydro-motion-ease-strong);
}

.citation-page img.loaded {
  transform: scale(1);
}

.temporary-materials[open] .temporary-materials-body,
.trace-step[open] .trace-content {
  animation: hydro-expand-enter var(--hydro-motion-base) var(--hydro-motion-ease) both;
}

.history-search:not([hidden]),
.history-batch:not([hidden]),
.feedback-consent:not([hidden]) {
  animation: hydro-content-enter var(--hydro-motion-base) var(--hydro-motion-ease) both;
}

@keyframes hydro-item-enter {
  from { opacity: 0; transform: translateY(6px) scale(0.992); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes hydro-content-enter {
  from { opacity: 0; transform: translateY(7px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes hydro-expand-enter {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes hydro-overlay-exit {
  from { opacity: 1; }
  to { opacity: 0; }
}

@keyframes hydro-dialog-exit {
  from { opacity: 1; transform: translateY(0) scale(1); }
  to { opacity: 0; transform: translateY(8px) scale(0.99); }
}

@keyframes hydro-manual-route-arrive {
  from { opacity: 0; transform: translateY(10px) scale(0.992); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

@media (max-width: 760px) {
  .account-overlay > .account-modal,
  .citation-modal-card {
    transform: translateY(24px);
  }

  .account-overlay.open > .account-modal,
  .citation-modal.open .citation-modal-card {
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  @view-transition { navigation: none; }

  ::view-transition-group(*),
  ::view-transition-old(*),
  ::view-transition-new(*) {
    animation: none !important;
  }

  :is(.calculation-link, .sluice-top-actions a, .engineering-navigation a, .topbar nav a, .legal-back, .calculation-mode a) {
    transition: none !important;
    transform: none !important;
  }
  :root {
    --hydro-motion-fast: 1ms;
    --hydro-motion-base: 1ms;
    --hydro-motion-layout: 1ms;
    --hydro-motion-exit: 1ms;
  }

  .profile-menu,
  .history-menu,
  .account-overlay,
  .citation-modal,
  .account-overlay > *,
  .citation-modal-card,
  .history-dialog,
  .image-viewer,
  .wallet-payment-overlay,
  .history-dialog-card,
  .image-viewer > *,
  .wallet-payment-dialog,
  .recharge-detail-dialog,
  .pending-upload-item,
  .message-attachment,
  .feedback-file-row,
  .inline-result,
  .tender-package-panel,
  .temporary-materials,
  .motion-content-enter {
    animation: none !important;
    transition-duration: 1ms !important;
    transform: none !important;
  }

  html.motion-route-arriving body {
    animation-duration: 1ms !important;
    transform: none !important;
  }
}