/* ═══════════════════════════════════════════════════════════════════
   OSMOSE — Nautical Observatory Theme
   Custom CSS overlay for shinyswatch/superhero base
   ═══════════════════════════════════════════════════════════════════ */

/* ── Google Fonts ─────────────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:ital,wght@0,300;0,400;0,500;0,600;0,700;1,400&family=JetBrains+Mono:wght@400;500&display=swap');

/* ── CSS Custom Properties ────────────────────────────────────────── */
:root {
  /* Ocean depths palette */
  --osm-bg-deep:       #0f1923;
  --osm-bg-mid:        #162029;
  --osm-bg-surface:    #1c2a36;
  --osm-bg-card:       rgba(22, 38, 52, 0.85);
  --osm-bg-card-hover: rgba(28, 48, 66, 0.92);

  /* Accent: warm amber (from superhero orange, refined) */
  --osm-accent:        #e8a838;
  --osm-accent-dim:    rgba(232, 168, 56, 0.15);
  --osm-accent-glow:   rgba(232, 168, 56, 0.3);

  /* Secondary: teal bioluminescence */
  --osm-teal:          #38c9b1;
  --osm-teal-dim:      rgba(56, 201, 177, 0.12);

  /* Text hierarchy */
  --osm-text-primary:  #e2e8f0;
  --osm-text-secondary:#a0b4c8;
  --osm-text-muted:    #5a6a7a;

  /* Borders & surfaces */
  --osm-border:        rgba(255, 255, 255, 0.06);
  --osm-border-accent: rgba(232, 168, 56, 0.25);

  /* Typography */
  --osm-font-body:     'Plus Jakarta Sans', -apple-system, sans-serif;
  --osm-font-mono:     'JetBrains Mono', 'Cascadia Code', monospace;

  /* Transitions */
  --osm-transition:    0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --osm-transition-slow: 0.35s cubic-bezier(0.4, 0, 0.2, 1);

  /* Z-index scale */
  --osm-z-base:        1;
  --osm-z-tab:         90;
  --osm-z-header:      100;
  --osm-z-modal:       1050;
  --osm-z-loading:     9999;
}

/* ── Base Typography ──────────────────────────────────────────────── */
body, .container-fluid {
  font-family: var(--osm-font-body) !important;
  color: var(--osm-text-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  letter-spacing: 0.01em;
}

h1, h2, h3, h4, h5, h6,
.h1, .h2, .h3, .h4, .h5, .h6 {
  font-family: var(--osm-font-body) !important;
  font-weight: 600;
  letter-spacing: -0.02em;
}

code, pre, .form-control[type="text"],
kbd, samp {
  font-family: var(--osm-font-mono) !important;
}

small, .small {
  font-weight: 400;
}

/* ── Page Background ──────────────────────────────────────────────── */
body {
  background: var(--osm-bg-deep) !important;
  background-image:
    radial-gradient(ellipse at 20% 50%, rgba(56, 201, 177, 0.03) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 20%, rgba(232, 168, 56, 0.02) 0%, transparent 50%);
  background-attachment: fixed;
}

/* ── App Header ───────────────────────────────────────────────────── */
.osmose-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 12px;
  background: linear-gradient(
    135deg,
    rgba(22, 38, 52, 0.95) 0%,
    rgba(15, 25, 35, 0.98) 100%
  );
  border-bottom: 1px solid var(--osm-border);
  box-shadow: 0 1px 8px rgba(0, 0, 0, 0.25);
  position: relative;
  z-index: var(--osm-z-header);
}

.osmose-header::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--osm-accent) 30%,
    var(--osm-teal) 70%,
    transparent 100%
  );
  opacity: 0.4;
}

.osmose-logo {
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--osm-text-primary);
  text-transform: uppercase;
  margin: 0;
  line-height: 1;
}

.osmose-logo .subtitle {
  font-size: 0.6rem;
  font-weight: 400;
  letter-spacing: 0.02em;
  color: var(--osm-text-muted);
  text-transform: none;
  margin-left: 2px;
}

.osmose-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  background: var(--osm-accent-dim);
  border: 1px solid var(--osm-border-accent);
  border-radius: 20px;
  font-size: 0.6rem;
  font-weight: 600;
  color: var(--osm-accent);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.osmose-badge .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--osm-teal);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 0.4; transform: scale(0.9); }
  50% { opacity: 1; transform: scale(1.1); }
}

/* ── Config info in header ──────────────────────────────────────── */
.osm-config-info {
  display: flex;
  align-items: center;
  margin-right: 8px;
}
.osm-config-name {
  color: var(--osm-accent);
  font-weight: 600;
  font-size: 0.78rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 180px;
  display: inline-block;
  vertical-align: middle;
}
.osm-config-stats {
  color: var(--osm-text-muted);
  font-size: 0.7rem;
  margin-left: 6px;
}
.osm-config-dirty {
  color: #e67e22;
  font-size: 0.65rem;
  font-style: italic;
  margin-left: 4px;
}

/* ── Header Actions (About / Help) ────────────────────────────────── */
.osmose-header-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 4px;
}

.osmose-header-btn {
  color: var(--osm-text-muted) !important;
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  padding: 3px 8px;
  border-radius: 6px;
  text-decoration: none !important;
  transition: all var(--osm-transition);
  cursor: pointer;
}

.osmose-header-btn:hover {
  color: var(--osm-accent) !important;
  background: var(--osm-accent-dim);
}

/* ── Engine Mode Toggle ──────────────────────────────────────────── */
.osm-engine-toggle {
  display: inline-flex;
  align-items: center;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--osm-border);
  border-radius: 6px;
  overflow: hidden;
  margin: 0 4px;
}

.osm-engine-toggle .osm-engine-btn {
  padding: 2px 10px;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--osm-text-muted);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: all var(--osm-transition);
}

.osm-engine-toggle .osm-engine-btn.active {
  color: var(--osm-accent);
  background: var(--osm-accent-dim);
}

.osm-engine-toggle .osm-engine-btn:hover:not(.active) {
  color: var(--osm-text-primary);
  background: rgba(255, 255, 255, 0.05);
}

/* ── About Version Badge ─────────────────────────────────────────── */
.osmose-about-version {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.osmose-version-badge {
  display: inline-block;
  padding: 3px 10px;
  background: var(--osm-accent-dim);
  border: 1px solid var(--osm-border-accent);
  border-radius: 20px;
  font-family: var(--osm-font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--osm-accent);
}

.osmose-version-label {
  font-size: 0.8rem;
  color: var(--osm-text-muted);
  font-weight: 400;
}

/* ── Modal Theming ───────────────────────────────────────────────── */
.modal-content {
  background: var(--osm-bg-surface) !important;
  border: 1px solid var(--osm-border) !important;
  border-radius: 14px !important;
  box-shadow: 0 16px 64px rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.modal-header {
  border-bottom: 1px solid var(--osm-border-accent) !important;
  padding: 16px 24px !important;
}

.modal-header .modal-title {
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.01em;
  color: var(--osm-text-primary);
}

.modal-header .btn-close {
  filter: invert(0.7);
  opacity: 0.6;
  transition: opacity var(--osm-transition);
}

.modal-header .btn-close:hover {
  opacity: 1;
}

.modal-body {
  padding: 24px !important;
  color: var(--osm-text-primary);
  font-size: 0.88rem;
  line-height: 1.7;
}

.modal-body h3 {
  color: var(--osm-accent);
  font-size: 1rem;
  margin-top: 4px;
  margin-bottom: 12px;
}

.modal-body h4 {
  color: var(--osm-teal);
  font-size: 0.9rem;
  margin-top: 14px;
  margin-bottom: 8px;
}

.modal-body hr {
  border-color: var(--osm-border) !important;
  margin: 18px 0;
}

.modal-body table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.83rem;
  margin: 10px 0;
}

.modal-body th {
  text-align: left;
  padding: 8px 12px;
  background: rgba(0, 0, 0, 0.2);
  color: var(--osm-text-secondary);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--osm-border-accent);
}

.modal-body td {
  padding: 6px 12px;
  border-bottom: 1px solid var(--osm-border);
  color: var(--osm-text-primary);
}

.modal-body a {
  color: var(--osm-teal);
  text-decoration: none;
}

.modal-body a:hover {
  color: var(--osm-accent);
  text-decoration: underline;
}

.modal-footer {
  border-top: 1px solid var(--osm-border) !important;
  padding: 12px 24px !important;
}

/* Help modal pills */
.modal-body .nav-pills .nav-link {
  font-size: 0.8rem !important;
  padding: 6px 14px !important;
  border-radius: 20px !important;
  box-shadow: none;
}

.modal-body .nav-pills .nav-link.active {
  box-shadow: none;
  border-radius: 20px !important;
}

/* ── Navigation Sidebar ───────────────────────────────────────────── */

/* Sidebar column background */
.nav-pills {
  padding: 6px 6px !important;
}

/* Section headers */
.nav-pills .nav-item .osmose-section-label {
  font-size: 0.55rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--osm-text-muted);
  padding: 8px 12px 2px;
  display: block;
  position: relative;
}

.nav-pills .nav-item:first-child .osmose-section-label {
  padding-top: 2px;
}

.nav-pills .nav-item .osmose-section-label::before {
  content: '';
  display: inline-block;
  width: 10px;
  height: 1px;
  background: var(--osm-text-muted);
  margin-right: 8px;
  vertical-align: middle;
  opacity: 0.5;
}

/* Nav pills styling */
.nav-pills .nav-link {
  color: var(--osm-text-secondary) !important;
  background: transparent !important;
  border: none !important;
  border-radius: 6px !important;
  padding: 3px 10px !important;
  font-size: 0.78rem;
  font-weight: 500;
  transition: all var(--osm-transition);
  position: relative;
  margin: 0;
}

.nav-pills .nav-link:hover {
  color: var(--osm-text-primary) !important;
  background: rgba(255, 255, 255, 0.04) !important;
}

.nav-pills .nav-link.active {
  color: var(--osm-accent) !important;
  background: var(--osm-accent-dim) !important;
  font-weight: 600;
  box-shadow: inset 3px 0 0 var(--osm-accent);
  border-radius: 0 8px 8px 0 !important;
}

/* ── Cards ─────────────────────────────────────────────────────────── */
.card {
  background: var(--osm-bg-card) !important;
  border: 1px solid var(--osm-border) !important;
  border-radius: 12px !important;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow:
    0 2px 8px rgba(0, 0, 0, 0.15),
    0 0 1px rgba(255, 255, 255, 0.05) inset;
  transition: border-color var(--osm-transition), box-shadow var(--osm-transition);
  overflow: hidden;
}

.card:hover {
  border-color: rgba(255, 255, 255, 0.1) !important;
}

.card-header {
  background: rgba(0, 0, 0, 0.15) !important;
  border-bottom: 1px solid var(--osm-border) !important;
  padding: 8px 14px !important;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--osm-text-primary);
  position: relative;
}

.card-header::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--osm-accent);
  opacity: 0.6;
  border-radius: 0 2px 2px 0;
}

.card-body {
  padding: 18px !important;
}

/* ── Form Inputs ──────────────────────────────────────────────────── */
.form-control,
.form-select {
  background: rgba(0, 0, 0, 0.2) !important;
  border: 1px solid var(--osm-border) !important;
  border-radius: 8px !important;
  color: var(--osm-text-primary) !important;
  font-family: var(--osm-font-body);
  font-size: 0.85rem;
  padding: 8px 12px;
  transition: border-color var(--osm-transition), box-shadow var(--osm-transition);
}

.form-control:focus,
.form-select:focus {
  border-color: var(--osm-accent) !important;
  box-shadow: 0 0 0 2px var(--osm-accent-dim) !important;
  outline: none;
}

.form-control::placeholder {
  color: var(--osm-text-muted) !important;
}

.form-label,
.control-label {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--osm-text-secondary);
  letter-spacing: 0.01em;
  margin-bottom: 4px;
}

/* Numeric input spinners */
input[type="number"] {
  font-family: var(--osm-font-mono) !important;
  font-size: 0.85rem;
}

/* File inputs */
.form-control[type="file"] {
  padding: 6px 12px;
  font-size: 0.8rem;
}

/* Switches / checkboxes */
.form-check-input:checked {
  background-color: var(--osm-accent) !important;
  border-color: var(--osm-accent) !important;
}

.form-check-label {
  font-size: 0.85rem;
  color: var(--osm-text-secondary);
}

/* Select dropdowns */
.form-select option {
  background: var(--osm-bg-mid);
  color: var(--osm-text-primary);
}

/* ── Buttons ──────────────────────────────────────────────────────── */
.btn {
  border-radius: 8px !important;
  font-family: var(--osm-font-body) !important;
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  padding: 8px 18px;
  transition: all var(--osm-transition);
  border: none !important;
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255,255,255,0.08) 0%, transparent 100%);
  pointer-events: none;
}

.btn-success {
  background: linear-gradient(135deg, #27ae60, #2ecc71) !important;
  box-shadow: 0 2px 8px rgba(46, 204, 113, 0.25);
}
.btn-success:hover {
  background: linear-gradient(135deg, #2ecc71, #27ae60) !important;
  box-shadow: 0 4px 16px rgba(46, 204, 113, 0.35);
  transform: translateY(-1px);
}

.btn-danger {
  background: linear-gradient(135deg, #c0392b, #e74c3c) !important;
  box-shadow: 0 2px 8px rgba(231, 76, 60, 0.25);
}
.btn-danger:hover {
  background: linear-gradient(135deg, #e74c3c, #c0392b) !important;
  box-shadow: 0 4px 16px rgba(231, 76, 60, 0.35);
  transform: translateY(-1px);
}

.btn-primary {
  background: linear-gradient(135deg, #2980b9, #3498db) !important;
  box-shadow: 0 2px 8px rgba(52, 152, 219, 0.25);
}
.btn-primary:hover {
  background: linear-gradient(135deg, #3498db, #2980b9) !important;
  box-shadow: 0 4px 16px rgba(52, 152, 219, 0.35);
  transform: translateY(-1px);
}

.btn-warning {
  background: linear-gradient(135deg, #d68910, #e8a838) !important;
  color: #fff !important;
  box-shadow: 0 2px 8px rgba(232, 168, 56, 0.25);
}
.btn-warning:hover {
  box-shadow: 0 4px 16px rgba(232, 168, 56, 0.35);
  transform: translateY(-1px);
}

.btn-info {
  background: linear-gradient(135deg, #2ba89e, #38c9b1) !important;
  color: #fff !important;
  box-shadow: 0 2px 8px rgba(56, 201, 177, 0.25);
}
.btn-info:hover {
  box-shadow: 0 4px 16px rgba(56, 201, 177, 0.35);
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0) !important;
}

.btn-lg {
  padding: 10px 24px !important;
  font-size: 0.9rem !important;
}

/* ── Tables ────────────────────────────────────────────────────────── */
.table {
  color: var(--osm-text-primary) !important;
  font-size: 0.83rem;
  border-color: var(--osm-border) !important;
}

.table thead th {
  background: rgba(0, 0, 0, 0.2) !important;
  border-bottom: 2px solid var(--osm-border-accent) !important;
  color: var(--osm-text-secondary) !important;
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 10px 12px !important;
}

.table td {
  padding: 8px 12px !important;
  border-color: var(--osm-border) !important;
  vertical-align: middle;
}

.table-striped > tbody > tr:nth-of-type(odd) > td {
  background: rgba(255, 255, 255, 0.02) !important;
}

.table-hover > tbody > tr:hover > td {
  background: var(--osm-accent-dim) !important;
  transition: background var(--osm-transition);
}

/* ── Accordion ─────────────────────────────────────────────────────── */
.accordion-item {
  background: transparent !important;
  border: 1px solid var(--osm-border) !important;
  border-radius: 8px !important;
  margin-bottom: 4px;
  overflow: hidden;
}

.accordion-button {
  background: rgba(0, 0, 0, 0.15) !important;
  color: var(--osm-text-primary) !important;
  font-weight: 500;
  font-size: 0.85rem;
  padding: 10px 16px;
  border: none !important;
  box-shadow: none !important;
}

.accordion-button:not(.collapsed) {
  background: var(--osm-accent-dim) !important;
  color: var(--osm-accent) !important;
}

.accordion-button::after {
  filter: invert(0.6);
}

.accordion-body {
  background: rgba(0, 0, 0, 0.08);
  padding: 14px 16px;
}

/* ── Tabs (inside cards, e.g., calibration results) ───────────────── */
.nav-tabs {
  border-bottom: 1px solid var(--osm-border) !important;
}

.nav-tabs .nav-link {
  color: var(--osm-text-secondary) !important;
  font-size: 0.83rem;
  font-weight: 500;
  border: none !important;
  padding: 8px 16px;
  transition: all var(--osm-transition);
  border-radius: 8px 8px 0 0 !important;
}

.nav-tabs .nav-link:hover {
  color: var(--osm-text-primary) !important;
  background: rgba(255, 255, 255, 0.03);
}

.nav-tabs .nav-link.active {
  background: var(--osm-bg-card) !important;
  color: var(--osm-accent) !important;
  border-bottom: 2px solid var(--osm-accent) !important;
  font-weight: 600;
}

/* ── Console Terminal (run page) ──────────────────────────────────── */
pre {
  font-family: var(--osm-font-mono) !important;
  border-radius: 10px !important;
  position: relative;
}

/* Subtle scanline effect */
pre::before {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 0, 0, 0.03) 2px,
    rgba(0, 0, 0, 0.03) 4px
  );
  pointer-events: none;
  border-radius: 10px;
}

/* ── Horizontal Rules ─────────────────────────────────────────────── */
hr {
  border-color: var(--osm-border) !important;
  opacity: 0.5;
  margin: 16px 0;
}

/* ── Scrollbar Styling ────────────────────────────────────────────── */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.12);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* Firefox scrollbar */
* {
  scrollbar-width: thin;
  scrollbar-color: rgba(255, 255, 255, 0.12) transparent;
}

/* ── Radio Buttons (scenario list) ────────────────────────────────── */
.form-check {
  padding: 6px 12px 6px 32px;
  margin-bottom: 2px;
  border-radius: 6px;
  transition: background var(--osm-transition);
}

.form-check:hover {
  background: rgba(255, 255, 255, 0.03);
}

.form-check-input[type="radio"] {
  border-color: var(--osm-text-muted) !important;
}

.form-check-input[type="radio"]:checked {
  background-color: var(--osm-accent) !important;
  border-color: var(--osm-accent) !important;
}

/* ── Sliders ──────────────────────────────────────────────────────── */
.irs--shiny .irs-bar {
  background: var(--osm-accent) !important;
  border-color: var(--osm-accent) !important;
}

.irs--shiny .irs-handle {
  border-color: var(--osm-accent) !important;
}

.irs--shiny .irs-single {
  background: var(--osm-accent) !important;
}

/* ── Plotly Charts Container ──────────────────────────────────────── */
.shiny-plot-output,
.plotly,
.js-plotly-plot {
  border-radius: 8px;
  overflow: hidden;
}

/* ── Notification Toasts ──────────────────────────────────────────── */
.shiny-notification {
  background: var(--osm-bg-surface) !important;
  border: 1px solid var(--osm-border) !important;
  border-radius: 10px !important;
  color: var(--osm-text-primary) !important;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  font-family: var(--osm-font-body);
}

/* ── File Upload ──────────────────────────────────────────────────── */
.shiny-input-container .progress {
  background: rgba(0, 0, 0, 0.2);
  border-radius: 4px;
  overflow: hidden;
}

.shiny-input-container .progress-bar {
  background: var(--osm-accent) !important;
}

/* ── Download Button styling ──────────────────────────────────────── */
.btn i.fa,
.btn .fa {
  margin-right: 6px;
}

/* ── Content area padding ─────────────────────────────────────────── */
.tab-content > .tab-pane {
  padding: 4px 2px;
}

/* ── Section separator inside cards ───────────────────────────────── */
.card h5, .card .h5 {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--osm-teal);
  margin-top: 8px;
  margin-bottom: 10px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--osm-teal-dim);
}

/* ── Animations ───────────────────────────────────────────────────── */

/* Fade in cards on load */
.card {
  animation: cardFadeIn 0.4s ease-out both;
}

@keyframes cardFadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Stagger cards within a row */
.row > .col-sm-4 > .card { animation-delay: 0s; }
.row > .col-sm-8 > .card { animation-delay: 0.08s; }
.row > .col-sm-6:nth-child(2) > .card { animation-delay: 0.08s; }

/* Tab content transition */
.tab-pane {
  animation: tabFadeIn 0.25s ease-out;
}

@keyframes tabFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ═══════════════════════════════════════════════════════════════════
   LIGHT THEME — Ocean Blue-White
   Activated via data-theme="light" on <html>
   ═══════════════════════════════════════════════════════════════════ */

[data-theme="light"] {
  /* Ocean blue-white palette */
  --osm-bg-deep:       #f0f4f8;
  --osm-bg-mid:        #e8edf2;
  --osm-bg-surface:    #ffffff;
  --osm-bg-card:       rgba(255, 255, 255, 0.95);
  --osm-bg-card-hover: rgba(255, 255, 255, 1);

  /* Accent: darkened amber for contrast on light */
  --osm-accent:        #d4942e;
  --osm-accent-dim:    rgba(212, 148, 46, 0.1);
  --osm-accent-glow:   rgba(212, 148, 46, 0.2);

  /* Secondary: darkened teal */
  --osm-teal:          #2ba89e;
  --osm-teal-dim:      rgba(43, 168, 158, 0.08);

  /* Text hierarchy */
  --osm-text-primary:  #1a2a3a;
  --osm-text-secondary:#4a5a6a;
  --osm-text-muted:    #8a95a0;

  /* Borders & surfaces */
  --osm-border:        rgba(0, 0, 0, 0.08);
  --osm-border-accent: rgba(212, 148, 46, 0.25);

  color-scheme: light;
}

/* ── Light: Page background ──────────────────────────────────────── */
[data-theme="light"] body {
  background: var(--osm-bg-deep) !important;
  background-image:
    radial-gradient(ellipse at 20% 50%, rgba(43, 168, 158, 0.04) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 20%, rgba(212, 148, 46, 0.03) 0%, transparent 50%) !important;
}

/* ── Light: Header ───────────────────────────────────────────────── */
[data-theme="light"] .osmose-header {
  background: linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.97) 0%,
    rgba(240, 244, 248, 0.98) 100%
  ) !important;
  border-bottom-color: rgba(0, 0, 0, 0.06) !important;
  box-shadow: 0 1px 8px rgba(0, 0, 0, 0.06) !important;
}

[data-theme="light"] .osmose-logo {
  color: #1a2a3a !important;
}

/* ── Light: Cards ────────────────────────────────────────────────── */
[data-theme="light"] .card {
  background: var(--osm-bg-card) !important;
  border: 1px solid rgba(0, 0, 0, 0.06) !important;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04), 0 0 0 1px rgba(0, 0, 0, 0.02) !important;
  backdrop-filter: none !important;
}

[data-theme="light"] .card:hover {
  border-color: rgba(0, 0, 0, 0.1) !important;
}

[data-theme="light"] .card-header {
  background: rgba(0, 0, 0, 0.02) !important;
  border-bottom: 1px solid rgba(0, 0, 0, 0.06) !important;
  color: var(--osm-text-primary) !important;
}

/* ── Light: Form inputs ──────────────────────────────────────────── */
[data-theme="light"] .form-control,
[data-theme="light"] .form-select {
  background: #ffffff !important;
  border: 1px solid rgba(0, 0, 0, 0.12) !important;
  color: var(--osm-text-primary) !important;
}

[data-theme="light"] .form-control:focus,
[data-theme="light"] .form-select:focus {
  border-color: var(--osm-accent) !important;
  box-shadow: 0 0 0 2px var(--osm-accent-dim) !important;
}

[data-theme="light"] .form-control::placeholder {
  color: var(--osm-text-muted) !important;
}

[data-theme="light"] .form-select option {
  background: #ffffff;
  color: var(--osm-text-primary);
}

/* ── Light: Navigation sidebar ───────────────────────────────────── */
[data-theme="light"] .nav-pills .nav-link {
  color: var(--osm-text-secondary) !important;
}

[data-theme="light"] .nav-pills .nav-link:hover {
  color: var(--osm-text-primary) !important;
  background: rgba(0, 0, 0, 0.03) !important;
}

[data-theme="light"] .nav-pills .nav-link.active {
  color: var(--osm-accent) !important;
  background: var(--osm-accent-dim) !important;
}

/* ── Light: Buttons ──────────────────────────────────────────────── */
[data-theme="light"] .btn::after {
  background: linear-gradient(180deg, rgba(255,255,255,0.15) 0%, transparent 100%);
}

/* ── Light: Tables ───────────────────────────────────────────────── */
[data-theme="light"] .table {
  color: var(--osm-text-primary) !important;
}

[data-theme="light"] .table thead th {
  background: rgba(0, 0, 0, 0.03) !important;
  color: var(--osm-text-secondary) !important;
  border-bottom-color: rgba(0, 0, 0, 0.1) !important;
}

[data-theme="light"] .table td {
  border-color: rgba(0, 0, 0, 0.05) !important;
}

[data-theme="light"] .table-striped > tbody > tr:nth-of-type(odd) > td {
  background: rgba(0, 0, 0, 0.015) !important;
}

[data-theme="light"] .table-hover > tbody > tr:hover > td {
  background: var(--osm-accent-dim) !important;
}

/* ── Light: Accordion ────────────────────────────────────────────── */
[data-theme="light"] .accordion-item {
  border-color: rgba(0, 0, 0, 0.08) !important;
}

[data-theme="light"] .accordion-button {
  background: rgba(0, 0, 0, 0.02) !important;
  color: var(--osm-text-primary) !important;
}

[data-theme="light"] .accordion-button:not(.collapsed) {
  background: var(--osm-accent-dim) !important;
  color: var(--osm-accent) !important;
}

[data-theme="light"] .accordion-button::after {
  filter: none;
}

[data-theme="light"] .accordion-body {
  background: rgba(0, 0, 0, 0.01);
}

/* ── Light: Tabs ─────────────────────────────────────────────────── */
[data-theme="light"] .nav-tabs {
  border-bottom-color: rgba(0, 0, 0, 0.08) !important;
}

[data-theme="light"] .nav-tabs .nav-link {
  color: var(--osm-text-secondary) !important;
}

[data-theme="light"] .nav-tabs .nav-link:hover {
  color: var(--osm-text-primary) !important;
  background: rgba(0, 0, 0, 0.02);
}

[data-theme="light"] .nav-tabs .nav-link.active {
  background: #ffffff !important;
  color: var(--osm-accent) !important;
}

/* ── Light: Console ──────────────────────────────────────────────── */
[data-theme="light"] pre {
  background: #1a2a3a !important;
  color: #38c9b1 !important;
}
[data-theme="light"] pre::before {
  display: none;
}

/* ── Light: Modals ───────────────────────────────────────────────── */
[data-theme="light"] .modal-content {
  background: #ffffff !important;
  border: 1px solid rgba(0, 0, 0, 0.1) !important;
  box-shadow: 0 16px 64px rgba(0, 0, 0, 0.15) !important;
  backdrop-filter: none !important;
}

[data-theme="light"] .modal-header {
  border-bottom-color: rgba(0, 0, 0, 0.08) !important;
}

[data-theme="light"] .modal-header .btn-close {
  filter: none;
}

[data-theme="light"] .modal-body th {
  background: rgba(0, 0, 0, 0.03);
  color: var(--osm-text-secondary);
}

[data-theme="light"] .modal-footer {
  border-top-color: rgba(0, 0, 0, 0.06) !important;
}

/* ── Light: Notifications ────────────────────────────────────────── */
[data-theme="light"] .shiny-notification {
  background: #ffffff !important;
  border: 1px solid rgba(0, 0, 0, 0.08) !important;
  color: var(--osm-text-primary) !important;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1) !important;
}

/* ── Light: Scrollbar ────────────────────────────────────────────── */
[data-theme="light"] ::-webkit-scrollbar-thumb {
  background: rgba(0, 0, 0, 0.12);
}

[data-theme="light"] ::-webkit-scrollbar-thumb:hover {
  background: rgba(0, 0, 0, 0.2);
}

[data-theme="light"] * {
  scrollbar-color: rgba(0, 0, 0, 0.12) transparent;
}

/* ── Light: Misc ─────────────────────────────────────────────────── */
[data-theme="light"] .form-check-input[type="radio"] {
  border-color: var(--osm-text-muted) !important;
}

[data-theme="light"] .form-check:hover {
  background: rgba(0, 0, 0, 0.02);
}

/* ── Theme Toggle Button ─────────────────────────────────────────── */
.osmose-theme-toggle {
  background: none;
  border: 1px solid var(--osm-border);
  border-radius: 8px;
  padding: 5px 10px;
  cursor: pointer;
  color: var(--osm-text-muted);
  font-size: 1rem;
  line-height: 1;
  transition: all var(--osm-transition);
  display: flex;
  align-items: center;
  gap: 4px;
}

.osmose-theme-toggle:hover {
  color: var(--osm-accent);
  border-color: var(--osm-border-accent);
  background: var(--osm-accent-dim);
}

/* Icon visibility: show the icon for what you switch TO */
.osmose-theme-toggle .icon-sun { display: inline; }
.osmose-theme-toggle .icon-moon { display: none; }

[data-theme="dark"] .osmose-theme-toggle .icon-sun { display: inline; }
[data-theme="dark"] .osmose-theme-toggle .icon-moon { display: none; }

[data-theme="light"] .osmose-theme-toggle .icon-sun { display: none; }
[data-theme="light"] .osmose-theme-toggle .icon-moon { display: inline; }

/* ── Responsive ───────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .osmose-header {
    padding: 10px 16px;
    flex-wrap: wrap;
  }

  .osmose-logo {
    font-size: 1.2rem;
  }

  .osmose-badge {
    display: none;
  }

  .osm-config-info {
    display: none;
  }

  .nav-pills .nav-link {
    font-size: 0.8rem !important;
    padding: 6px 10px !important;
  }
}

/* ── Loading overlay ────────────────────────────────────────── */
.osm-loading-overlay {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(15, 25, 35, 0.85);
    display: flex; align-items: center; justify-content: center;
    z-index: var(--osm-z-loading);
}
.osm-loading-content { text-align: center; color: #e2e8f0; }
.osm-loading-content p { margin-top: 1rem; font-size: 1.1rem; }
.osm-spinner {
    width: 48px; height: 48px;
    border: 4px solid rgba(232, 168, 56, 0.2);
    border-top-color: #e8a838;
    border-radius: 50%;
    animation: osm-spin 0.8s linear infinite;
    margin: 0 auto;
}
@keyframes osm-spin { to { transform: rotate(360deg); } }

/* ── Dirty changes banner ───────────────────────────────────── */
.osm-dirty-banner {
    background: rgba(232, 168, 56, 0.15);
    border-left: 3px solid #e8a838;
    color: #e8a838;
    padding: 0.5rem 1rem;
    font-size: 0.85rem; font-weight: 500; text-align: center;
}
[data-theme="light"] .osm-dirty-banner {
    background: rgba(212, 148, 46, 0.1);
    border-left-color: #d4942e; color: #d4942e;
}

/* ── Field validation errors ────────────────────────────────── */
.field-error-msg {
    color: #e74c3c; font-size: 0.75rem; margin-top: 0.25rem;
    padding-left: 0.5rem; border-left: 2px solid #e74c3c;
}
[data-theme="light"] .field-error-msg { color: #c0392b; border-left-color: #c0392b; }

/* Tooltip (?) icon */
.osm-tooltip-icon {
    color: #5a6a7a;
    font-size: 11px;
    cursor: help;
    border: 1px solid #5a6a7a;
    border-radius: 50%;
    padding: 0 4px;
    margin-left: 4px;
    display: inline-block;
    line-height: 1.3;
}
.osm-tooltip-icon:hover {
    color: #d4a017;
    border-color: #d4a017;
}

/* ── Collapsible nav sidebar ──────────────────────────────────── */
/* Nav collapse button (« in the pill list) */
.osm-nav-collapse-btn {
    display: block;
    width: 100%;
    text-align: right;
    margin-bottom: 4px;
}

/* Nav column: transition for collapse animation */
body > .row {
    display: flex;
    flex-wrap: nowrap;
}
body > .row > [class*="col-"]:first-child {
    transition: width var(--osm-transition-slow),
                min-width var(--osm-transition-slow),
                max-width var(--osm-transition-slow),
                opacity var(--osm-transition),
                padding var(--osm-transition-slow);
}
/* Collapsed nav column — same pattern as panel collapse */
body > .row > .nav-col-collapsed {
    width: 0 !important;
    min-width: 0 !important;
    max-width: 0 !important;
    flex: 0 !important;
    overflow: hidden;
    opacity: 0;
    padding: 0 !important;
}
/* Content column expands when nav is collapsed */
body > .row > .nav-col-collapsed ~ [class*="col-"] {
    flex: 1 !important;
    max-width: 100% !important;
    transition: max-width var(--osm-transition-slow);
}

/* ── Collapsible page panels ──────────────────────────────────── */
.osm-split-layout {
    display: flex;
    height: 100%;
}
.osm-split-layout > .row,
.osm-split-layout > .bslib-grid {
    flex: 1;
    flex-wrap: nowrap;
}
.osm-split-layout > .row > div:first-child,
.osm-split-layout > .bslib-grid > div:first-child {
    transition: width var(--osm-transition-slow),
                opacity var(--osm-transition),
                padding var(--osm-transition-slow),
                min-width var(--osm-transition-slow);
}
.osm-split-layout > .row > div:first-child.collapsed,
.osm-split-layout > .bslib-grid > div:first-child.collapsed {
    width: 0 !important;
    flex: 0 !important;
    min-width: 0 !important;
    overflow: hidden;
    opacity: 0;
    padding: 0 !important;
}
.osm-split-layout > .row > div:first-child.collapsed ~ div,
.osm-split-layout > .bslib-grid > div:first-child.collapsed ~ div {
    flex: 1;
    max-width: 100%;
}
/* When first child is collapsed on a CSS Grid container, give all columns to second child */
.osm-split-layout > .bslib-grid:has(> div:first-child.collapsed) {
    grid-template-columns: repeat(12, 1fr) !important;
}
.osm-split-layout > .bslib-grid > div:first-child.collapsed {
    grid-column: span 0 !important;
    display: none !important;
}
.osm-split-layout > .bslib-grid > div:first-child.collapsed ~ div {
    grid-column: 1 / -1 !important;
}
/* When panel is collapsed, the bslib-grid sibling should not squeeze the expand tab */
.osm-split-layout > .osm-expand-tab.visible + .bslib-grid,
.osm-split-layout > .osm-expand-tab.visible + .row {
    flex: 1;
    min-width: 0;
}

/* ── Expand tab ───────────────────────────────────────────────── */
.osm-expand-tab {
    display: none;
    writing-mode: vertical-rl;
    text-orientation: mixed;
    background: var(--osm-bg-card);
    border: 1px solid var(--osm-border);
    border-left: 3px solid var(--osm-accent);
    padding: 12px 6px;
    border-radius: 0 8px 8px 0;
    cursor: pointer;
    color: var(--osm-text-secondary);
    font-size: 12px;
    font-weight: 600;
    align-self: flex-start;
    flex-shrink: 0;
    flex-grow: 0;
    width: 28px;
    min-width: 28px;
    max-width: 28px;
    z-index: var(--osm-z-tab);
    position: sticky;
    top: 140px;
    transition: all var(--osm-transition);
}
.osm-expand-tab:hover {
    color: var(--osm-accent);
    background: var(--osm-bg-card-hover);
}
.osm-expand-tab.visible {
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ── Collapse button in card header ───────────────────────────── */
.osm-collapse-btn {
    background: none;
    border: none;
    color: var(--osm-text-muted);
    cursor: pointer;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 16px;
    line-height: 1;
    margin-left: auto;
    transition: all var(--osm-transition);
}
.osm-collapse-btn:hover {
    color: var(--osm-accent);
    background: var(--osm-accent-dim);
}
.card-header:has(.osm-collapse-btn) {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* ── Light theme overrides for collapsible components ─────────── */
[data-theme="light"] .osm-expand-tab {
    background: var(--osm-bg-card);
    border-color: var(--osm-border);
    border-left-color: var(--osm-accent);
    color: var(--osm-text-secondary);
}
[data-theme="light"] .osm-expand-tab:hover {
    color: var(--osm-accent);
    background: var(--osm-bg-card-hover);
}
[data-theme="light"] .osm-collapse-btn {
    color: var(--osm-text-muted);
}
[data-theme="light"] .osm-collapse-btn:hover {
    color: var(--osm-accent);
    background: var(--osm-accent-dim);
}
[data-theme="light"] .osm-hamburger {
    color: var(--osm-text-secondary);
}
[data-theme="light"] .osm-hamburger:hover {
    color: var(--osm-accent);
}

/* ── Grid map container (plain map, no card) ─────────────────── */
.osm-grid-map-container {
    position: relative;
    display: flex;
    flex-direction: column;
    height: 100%;
    min-height: 500px;
    border-radius: 8px;
    /* overflow: visible so deck.gl widget overlays (legend, scale) are not clipped */
    overflow: visible;
}
.osm-grid-map-container .deckgl-map {
    flex: 1;
    border-radius: 8px;
    /* Clip the map canvas to rounded corners without clipping external deck.gl widgets */
    overflow: hidden;
}

/* ── WebGL / CPU renderer badge ──────────────────────────────── */
.osm-renderer-badge {
    position: absolute;
    bottom: 8px;
    left: 8px;
    z-index: 5;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 3px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.3px;
    line-height: 1;
    pointer-events: none;
    opacity: 0.85;
    background: rgba(30, 30, 30, 0.7);
    color: #ccc;
    backdrop-filter: blur(4px);
}
.osm-renderer-badge .osm-badge-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: #6c757d;
}
.osm-renderer-badge.webgl .osm-badge-dot { background: #28a745; }
.osm-renderer-badge.cpu .osm-badge-dot  { background: #fd7e14; }

/* ── Deck.gl layer legend sizing ─────────────────────────────── */
.deck-legend-body {
    max-height: 260px;
    overflow-y: auto;
}

/* ── Movement animation controls ─────────────────────────── */
.osm-movement-controls .shiny-input-container {
    margin-bottom: 8px;
}
.osm-movement-controls .irs {
    margin-top: 4px;
}

/* ── Compact form layout (global) ────────────────────────────
   Applied across all pages so the app feels uniformly dense.
   Exceptions (e.g. console textareas, large map widgets) scope
   their own overrides locally. */
.shiny-input-container {
    margin-bottom: 6px;
}
.shiny-input-container > label,
.shiny-input-container > .control-label,
.control-label {
    margin-bottom: 2px;
    font-size: 0.85rem;
}
.form-control,
.form-select {
    padding: 0.25rem 0.5rem;
    font-size: 0.85rem;
    min-height: auto;
}
/* Let textareas (console output, scenario JSON) keep readable sizing. */
textarea.form-control {
    font-size: 0.82rem;
    padding: 0.4rem 0.55rem;
}
.card-body {
    padding: 0.6rem 0.8rem;
}
.card-header {
    padding: 0.5rem 0.8rem;
}
/* h4/h5 are widely used as section titles — tighten them too. */
.card h4, .card h5 {
    font-size: 0.95rem;
    margin: 0.5rem 0 0.25rem;
}
hr {
    margin: 0.5rem 0;
}
.form-switch {
    margin-bottom: 4px;
}
/* Action buttons in dense forms */
.btn-sm, .btn {
    padding: 0.3rem 0.7rem;
}
/* Preserve larger padding for the primary run buttons where emphasis helps. */
.btn-run, .btn-lg {
    padding: 0.5rem 1rem !important;
}

/* ── Responsive / mobile ────────────────────────────────────── */
@media (max-width: 768px) {
    .nav-pills { flex-wrap: nowrap; overflow-x: auto; -webkit-overflow-scrolling: touch; white-space: nowrap; padding-bottom: 0.5rem; }
    .nav-pills .nav-item { flex-shrink: 0; }
    .osmose-badge { display: none; }
    .osmose-logo { font-size: 1.1rem; }
    .osmose-header { padding: 0.5rem 1rem; }
    .modal-dialog { width: 95vw; max-width: 95vw; margin: 1rem auto; }
    .modal-body { max-height: 70vh; overflow-y: auto; }
    .card-body { padding: 0.75rem; }
    .osmose-section-label { font-size: 0.7rem; }
}

/* ═══════════════════════════════════════════════════════════════════
   ENHANCEMENT: Ambient Ocean Atmosphere
   Subtle animated caustic light + wave-line on header
   ═══════════════════════════════════════════════════════════════════ */

/* Caustic light overlay on page background */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 600px 400px at 15% 80%, rgba(56, 201, 177, 0.035) 0%, transparent 100%),
    radial-gradient(ellipse 500px 350px at 75% 30%, rgba(232, 168, 56, 0.025) 0%, transparent 100%),
    radial-gradient(ellipse 300px 300px at 50% 60%, rgba(56, 201, 177, 0.02) 0%, transparent 100%);
  animation: causticDrift 20s ease-in-out infinite alternate;
  pointer-events: none;
  z-index: 0;
}

/* Pause caustic animation when browser tab is hidden */
html.paused body::before {
  animation-play-state: paused;
}

@keyframes causticDrift {
  0% {
    background-position: 0% 0%, 100% 0%, 50% 50%;
    opacity: 0.6;
  }
  33% {
    opacity: 1;
  }
  66% {
    opacity: 0.7;
  }
  100% {
    background-position: 5% 3%, 95% 5%, 45% 55%;
    opacity: 0.9;
  }
}

/* Animated wave line under header (replaces static gradient) */
.osmose-header::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--osm-teal) 20%,
    var(--osm-accent) 50%,
    var(--osm-teal) 80%,
    transparent 100%
  );
  background-size: 200% 100%;
  opacity: 0.5;
  animation: waveShimmer 8s ease-in-out infinite;
}

@keyframes waveShimmer {
  0%   { background-position: 0% 0%; opacity: 0.35; }
  50%  { background-position: 100% 0%; opacity: 0.6; }
  100% { background-position: 0% 0%; opacity: 0.35; }
}

/* Ensure content sits above caustic layer */
.osmose-header,
.container-fluid,
body > .row,
.osm-loading-overlay {
  position: relative;
  z-index: var(--osm-z-base);
}

/* Light theme: softer caustics */
[data-theme="light"] body::before {
  background:
    radial-gradient(ellipse 600px 400px at 15% 80%, rgba(43, 168, 158, 0.04) 0%, transparent 100%),
    radial-gradient(ellipse 500px 350px at 75% 30%, rgba(212, 148, 46, 0.03) 0%, transparent 100%),
    radial-gradient(ellipse 300px 300px at 50% 60%, rgba(43, 168, 158, 0.02) 0%, transparent 100%);
}

/* ═══════════════════════════════════════════════════════════════════
   ENHANCEMENT: Polished Notifications
   Slide-in toasts with accent bars and auto-dismiss progress
   ═══════════════════════════════════════════════════════════════════ */

.shiny-notification {
  border-radius: 12px !important;
  border-left: 4px solid var(--osm-teal) !important;
  border-right: none !important;
  border-top: none !important;
  border-bottom: none !important;
  animation: notifSlideIn 0.35s cubic-bezier(0.34, 1.56, 0.64, 1) both;
  overflow: hidden;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

/* Accent bar color by notification type */
.shiny-notification-message {
  border-left-color: var(--osm-teal) !important;
}

.shiny-notification-warning {
  border-left-color: var(--osm-accent) !important;
}

.shiny-notification-error {
  border-left-color: #e74c3c !important;
}

/* Auto-dismiss progress shimmer at bottom */
.shiny-notification::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  height: 2px;
  width: 100%;
  background: linear-gradient(90deg, var(--osm-teal), var(--osm-accent));
  animation: notifProgress 5s linear forwards;
  opacity: 0.6;
}

.shiny-notification-error::after {
  background: linear-gradient(90deg, #e74c3c, #c0392b);
  animation-duration: 15s;
}

.shiny-notification-warning::after {
  background: linear-gradient(90deg, var(--osm-accent), #d68910);
}

@keyframes notifSlideIn {
  from {
    transform: translateX(40px) scale(0.95);
    opacity: 0;
  }
  to {
    transform: translateX(0) scale(1);
    opacity: 1;
  }
}

@keyframes notifProgress {
  from { width: 100%; }
  to { width: 0%; }
}

/* Close button refinement */
.shiny-notification .close,
.shiny-notification .btn-close {
  opacity: 0.4;
  transition: opacity var(--osm-transition);
}

.shiny-notification .close:hover,
.shiny-notification .btn-close:hover {
  opacity: 1;
}

/* Light theme notifications */
[data-theme="light"] .shiny-notification {
  backdrop-filter: blur(16px);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.1), 0 1px 3px rgba(0, 0, 0, 0.06) !important;
}

/* ═══════════════════════════════════════════════════════════════════
   ENHANCEMENT: Sonar Pulse Loading Spinner
   Concentric rings pulse outward like marine sonar
   ═══════════════════════════════════════════════════════════════════ */

.osm-spinner {
  width: 56px;
  height: 56px;
  border: none;
  border-radius: 50%;
  position: relative;
  animation: none;
  background: none;
  margin: 0 auto;
}

/* Central dot */
.osm-spinner::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 10px;
  height: 10px;
  margin: -5px 0 0 -5px;
  background: var(--osm-accent);
  border-radius: 50%;
  animation: sonarCorePulse 2s ease-in-out infinite;
  box-shadow: 0 0 12px rgba(232, 168, 56, 0.4);
}

/* First sonar ring */
.osm-spinner::after {
  content: '';
  position: absolute;
  inset: 0;
  border: 2px solid var(--osm-accent);
  border-radius: 50%;
  animation: sonarRing 2s ease-out infinite;
}

@keyframes sonarRing {
  0% {
    transform: scale(0.3);
    opacity: 0.8;
  }
  100% {
    transform: scale(1);
    opacity: 0;
  }
}

@keyframes sonarCorePulse {
  0%, 100% { transform: scale(1); opacity: 0.9; }
  50% { transform: scale(1.3); opacity: 1; }
}

/* Second ring via box-shadow on the loading content wrapper */
.osm-loading-content::before {
  content: '';
  display: block;
  width: 56px;
  height: 56px;
  margin: 0 auto 0;
  border: 2px solid var(--osm-teal);
  border-radius: 50%;
  animation: sonarRing 2s ease-out 0.6s infinite;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

.osm-loading-content {
  position: relative;
  padding-top: 0;
}

/* Third ring (outermost, subtle) */
.osm-loading-content::after {
  content: '';
  display: block;
  width: 56px;
  height: 56px;
  margin: 0 auto;
  border: 1px solid rgba(56, 201, 177, 0.4);
  border-radius: 50%;
  animation: sonarRing 2s ease-out 1.2s infinite;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

/* Loading text refinement */
.osm-loading-content p {
  margin-top: 1.5rem;
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--osm-text-secondary);
  animation: loadTextPulse 2s ease-in-out infinite;
}

@keyframes loadTextPulse {
  0%, 100% { opacity: 0.6; }
  50% { opacity: 1; }
}

/* Loading overlay backdrop — frosted glass */
.osm-loading-overlay {
  background: rgba(15, 25, 35, 0.7) !important;
  backdrop-filter: blur(8px) saturate(1.2);
  -webkit-backdrop-filter: blur(8px) saturate(1.2);
}

[data-theme="light"] .osm-loading-overlay {
  background: rgba(240, 244, 248, 0.75) !important;
}

[data-theme="light"] .osm-loading-content p {
  color: var(--osm-text-secondary);
}

/* ═══════════════════════════════════════════════════════════════════
   ENHANCEMENT: Nav Sidebar Micro-interactions
   Glow on active, animated separators, bounce transitions
   ═══════════════════════════════════════════════════════════════════ */

/* Active nav item: subtle glow */
.nav-pills .nav-link.active {
  box-shadow:
    inset 3px 0 0 var(--osm-accent),
    0 0 16px rgba(232, 168, 56, 0.08),
    0 0 4px rgba(232, 168, 56, 0.05) !important;
  animation: navGlowPulse 3s ease-in-out infinite;
}

@keyframes navGlowPulse {
  0%, 100% {
    box-shadow:
      inset 3px 0 0 var(--osm-accent),
      0 0 12px rgba(232, 168, 56, 0.06),
      0 0 3px rgba(232, 168, 56, 0.04);
  }
  50% {
    box-shadow:
      inset 3px 0 0 var(--osm-accent),
      0 0 20px rgba(232, 168, 56, 0.1),
      0 0 6px rgba(232, 168, 56, 0.07);
  }
}

/* Nav link hover: lift and brighten */
.nav-pills .nav-link {
  transition: all 0.25s cubic-bezier(0.34, 1.56, 0.64, 1) !important;
}

.nav-pills .nav-link:hover {
  transform: translateX(3px);
}

.nav-pills .nav-link.active:hover {
  transform: translateX(0);
}

/* Section header animated separator */
.nav-pills .nav-item .osmose-section-label::before {
  transition: width 0.4s ease-out, opacity 0.3s ease;
  width: 0;
  opacity: 0;
}

.nav-pills .nav-item .osmose-section-label:hover::before {
  width: 20px;
  opacity: 0.8;
}

/* Stagger section labels on initial load */
.nav-pills .nav-item:nth-child(1) .osmose-section-label { animation: sectionFadeIn 0.5s 0.1s both; }
.nav-pills .nav-item:nth-child(3) .osmose-section-label { animation: sectionFadeIn 0.5s 0.2s both; }
.nav-pills .nav-item:nth-child(9) .osmose-section-label { animation: sectionFadeIn 0.5s 0.3s both; }
.nav-pills .nav-item:nth-child(12) .osmose-section-label { animation: sectionFadeIn 0.5s 0.4s both; }

@keyframes sectionFadeIn {
  from {
    opacity: 0;
    transform: translateX(-8px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Section separator: expanding line appears on load */
.nav-pills .nav-item .osmose-section-label::after {
  content: '';
  display: block;
  height: 1px;
  background: linear-gradient(90deg, var(--osm-text-muted), transparent);
  margin-top: 6px;
  opacity: 0.2;
  animation: separatorExpand 0.6s 0.5s ease-out both;
}

@keyframes separatorExpand {
  from { width: 0; }
  to { width: 100%; }
}

/* Nav collapse/expand — bounce easing */
body > .row > [class*="col-"]:first-child {
  transition: width 0.4s cubic-bezier(0.34, 1.2, 0.64, 1),
              min-width 0.4s cubic-bezier(0.34, 1.2, 0.64, 1),
              max-width 0.4s cubic-bezier(0.34, 1.2, 0.64, 1),
              opacity 0.25s ease,
              padding 0.4s cubic-bezier(0.34, 1.2, 0.64, 1) !important;
}

/* Expand tab entrance animation */
.osm-expand-tab.visible {
  animation: expandTabSlide 0.35s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}

@keyframes expandTabSlide {
  from {
    transform: translateX(-10px);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

/* Collapse button rotation on hover */
.osm-collapse-btn,
.osm-nav-collapse-btn {
  transition: all 0.25s cubic-bezier(0.34, 1.56, 0.64, 1) !important;
}

.osm-nav-collapse-btn:hover {
  transform: scale(1.15);
}

/* Card header collapse button rotation */
.osm-collapse-btn:hover {
  transform: scale(1.1) rotate(-5deg);
}

/* Badge pulse enhancement — sync with marine feel */
.osmose-badge .dot {
  box-shadow: 0 0 6px rgba(56, 201, 177, 0.3);
}

@keyframes pulse-dot {
  0%, 100% { opacity: 0.4; transform: scale(0.85); box-shadow: 0 0 4px rgba(56, 201, 177, 0.2); }
  50% { opacity: 1; transform: scale(1.15); box-shadow: 0 0 10px rgba(56, 201, 177, 0.5); }
}

/* Tooltip icon micro-interaction */
.osm-tooltip-icon {
  transition: all 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.osm-tooltip-icon:hover {
  transform: scale(1.15);
  box-shadow: 0 0 8px rgba(212, 160, 23, 0.3);
}

/* ── Reduce motion for accessibility ────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  body::before,
  .osmose-header::after,
  .osm-spinner::before,
  .osm-spinner::after,
  .osm-loading-content::before,
  .osm-loading-content::after,
  .osm-loading-content p,
  .osmose-badge .dot,
  .nav-pills .nav-link.active {
    animation: none !important;
  }
  .shiny-notification {
    animation: none !important;
  }
  .shiny-notification::after {
    animation: none !important;
  }
  .nav-pills .nav-link:hover {
    transform: none !important;
  }
}

/* Disabled nav pill — used for Spatial Results before a run completes */
.nav-pills .nav-link.osm-disabled {
  opacity: 0.4;
  pointer-events: none;
  cursor: not-allowed;
}

/* Engine-gated nav items — disabled when Java engine selected */
.nav-pills .nav-link:has(.osm-engine-gated.osm-disabled) {
  opacity: 0.4;
  pointer-events: none;
  cursor: not-allowed;
}