:root {
  /* Kererū palette */
  --kereru-teal: #325756;
  --kereru-blue: #7d9fc2;
  --kereru-pink: #C582B2;
  --kereru-green: #51806a;
  --kereru-purple: #4d5f8e;
  --kereru-lavender: #A092B7;
  
  --primary: var(--kereru-teal);
  --primary-light: var(--kereru-blue);
  --accent: var(--kereru-pink);
  --secondary: var(--kereru-green);
  --tertiary: var(--kereru-purple);
  --highlight: var(--kereru-lavender);
  
  --ios-gray: #8E8E93;
  --ios-light-gray: #F2F2F7;
  --ios-separator: #C6C6C8;
  --ios-bg: #FFFFFF;
  --ios-card: #FFFFFF;
  --ios-text: #000000;
  --ios-secondary: #3C3C43;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --tab-height: 56px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ios-light-gray: #1C1C1E;
    --ios-bg: #000000;
    --ios-card: #1C1C1E;
    --ios-text: #FFFFFF;
    --ios-secondary: #EBEBF5;
    --ios-separator: #38383A;
  }
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, sans-serif;
  margin: 0;
  padding: 0;
  background: var(--ios-light-gray);
  color: var(--ios-text);
  font-size: 17px;
  line-height: 1.4;
  padding-top: var(--safe-top);
  padding-bottom: calc(var(--tab-height) + var(--safe-bottom));
  min-height: 100vh;
  overflow-x: hidden;
}

/* Tab Bar */
.tab-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: calc(var(--tab-height) + var(--safe-bottom));
  padding-bottom: var(--safe-bottom);
  background: var(--primary);
  border-top: 0.5px solid var(--ios-separator);
  display: flex;
  justify-content: space-around;
  align-items: flex-start;
  z-index: 1000;
}

.tab-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 6px 0;
  color: rgba(255,255,255,0.6);
  text-decoration: none;
  font-size: 10px;
  font-weight: 500;
  cursor: pointer;
  transition: color 0.2s;
}

.tab-item.active { color: white; }
.tab-item svg { width: 28px; height: 28px; margin-bottom: 2px; }

/* Tab Content */
.tab-content { display: none; }
.tab-content.active { display: block; }

/* Map - shared across tabs except Examples */
#sharedMapContainer {
  width: 100%;
  position: relative;
}

#sharedMapContainer.hidden {
  display: none;
}

#mapContainerMobile {
  width: 100%;
  height: 35vh;
  min-height: 150px;
  max-height: 80vh;
}

#mapResizeHandle {
  width: 100%;
  height: 12px;
  background: var(--ios-light-gray);
  cursor: ns-resize;
  display: flex;
  align-items: center;
  justify-content: center;
  touch-action: none;
  user-select: none;
}

#mapResizeHandle::after {
  content: '';
  width: 40px;
  height: 4px;
  background: var(--ios-separator);
  border-radius: 2px;
}

#mapResizeHandle:hover::after,
#mapResizeHandle:active::after {
  background: var(--primary);
}

@media (min-width: 768px) {
  #mapContainerMobile {
    height: 40vh;
    min-height: 200px;
    max-height: 80vh;
  }
}

.app-container {
  max-width: 800px;
  margin: 0 auto;
}

/* Cards */
.card {
  background: var(--ios-card);
  margin: 12px;
  border-radius: 12px;
  overflow: hidden;
}

.card-header {
  padding: 12px 16px 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.card-body { padding: 0 16px 16px; }

/* iOS-style segmented control */
.segmented-control {
  display: flex;
  background: var(--ios-light-gray);
  border-radius: 9px;
  padding: 2px;
  margin: 8px 0;
}

.segmented-control label {
  flex: 1;
  text-align: center;
  padding: 8px 12px;
  font-size: 13px;
  font-weight: 500;
  border-radius: 7px;
  cursor: pointer;
  transition: all 0.2s;
}

.segmented-control input { display: none; }
.segmented-control input:checked + span {
  background: var(--ios-card);
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
  color: var(--primary);
}

.segmented-control span {
  display: block;
  padding: 8px 6px;
  border-radius: 7px;
  transition: all 0.2s;
}

/* Form elements */
textarea, input[type="text"], select {
  width: 100%;
  padding: 12px;
  font-size: 16px;
  border: 1px solid var(--ios-separator);
  border-radius: 10px;
  background: var(--ios-bg);
  color: var(--ios-text);
  font-family: inherit;
  -webkit-appearance: none;
  appearance: none;
}

textarea:focus, input[type="text"]:focus, select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(50, 87, 86, 0.2);
}

textarea {
  min-height: 100px;
  resize: vertical;
  font-family: 'SF Mono', ui-monospace, monospace;
  font-size: 14px;
}

select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%23325756'%3E%3Cpath d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 12px 20px;
  font-size: 17px;
  font-weight: 600;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.2s;
  -webkit-appearance: none;
}

.btn-primary {
  background: var(--primary);
  color: white;
  width: 100%;
}

.btn-primary:active { background: var(--kereru-purple); transform: scale(0.98); }

.btn-secondary {
  background: var(--ios-light-gray);
  color: var(--primary);
}

.btn-secondary:active { background: var(--ios-separator); }

.btn-row {
  display: flex;
  gap: 8px;
  margin-top: 12px;
}

.btn-row .btn { flex: 1; }

/* Results */
.result-box {
  background: var(--ios-light-gray);
  border-radius: 10px;
  padding: 12px;
  font-family: 'SF Mono', ui-monospace, monospace;
  font-size: 13px;
  white-space: pre-wrap;
  word-break: break-all;
  margin: 8px 0;
  min-height: 60px;
  border-left: 3px solid var(--primary);
}

/* List rows */
.list-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
  border-bottom: 0.5px solid var(--ios-separator);
}

.list-row:last-child { border-bottom: none; }

.list-row label {
  font-size: 17px;
  color: var(--ios-text);
}

/* Toggle switch */
.toggle {
  position: relative;
  width: 51px;
  height: 31px;
}

.toggle input {
  position: absolute;
  opacity: 0;
  width: 100%;
  height: 100%;
  cursor: pointer;
  z-index: 1;
  margin: 0;
}

.toggle-slider {
  position: absolute;
  inset: 0;
  background: var(--ios-separator);
  border-radius: 31px;
  transition: 0.3s;
  cursor: pointer;
}

.toggle-slider::before {
  content: '';
  position: absolute;
  width: 27px;
  height: 27px;
  left: 2px;
  top: 2px;
  background: white;
  border-radius: 50%;
  transition: 0.3s;
  box-shadow: 0 2px 4px rgba(0,0,0,0.2);
  pointer-events: none;
}

.toggle input:checked + .toggle-slider { background: var(--secondary); }
.toggle input:checked + .toggle-slider::before { transform: translateX(20px); }

/* Info box */
.info-box {
  background: rgba(50, 87, 86, 0.1);
  border-radius: 10px;
  padding: 12px;
  font-size: 14px;
  color: var(--primary);
  margin: 8px 0;
  border-left: 3px solid var(--primary);
}

/* Examples */
.examples-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 8px;
  margin-top: 12px;
}

.example-link {
  display: block;
  padding: 10px 12px;
  background: linear-gradient(135deg, var(--kereru-teal) 0%, var(--kereru-purple) 100%);
  border-radius: 8px;
  text-decoration: none;
  color: white;
  font-size: 14px;
  text-align: center;
  transition: all 0.2s;
}

.example-link:active { transform: scale(0.96); opacity: 0.9; }

.example-link code {
  display: block;
  font-size: 11px;
  color: rgba(255,255,255,0.8);
  margin-top: 4px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Category colors */
.card:nth-child(1) .example-link { background: linear-gradient(135deg, var(--kereru-pink) 0%, var(--kereru-lavender) 100%); }
.card:nth-child(2) .example-link { background: linear-gradient(135deg, var(--kereru-green) 0%, var(--kereru-teal) 100%); }
.card:nth-child(3) .example-link { background: linear-gradient(135deg, var(--kereru-blue) 0%, var(--kereru-purple) 100%); }
.card:nth-child(4) .example-link { background: linear-gradient(135deg, var(--kereru-teal) 0%, var(--kereru-green) 100%); }
.card:nth-child(5) .example-link { background: linear-gradient(135deg, var(--kereru-purple) 0%, var(--kereru-pink) 100%); }

/* Desktop layout */
@media (min-width: 768px) {
  body {
    padding-bottom: 0;
  }
  
  .tab-bar {
    position: static;
    height: auto;
    padding: 12px 20px;
    justify-content: flex-start;
    gap: 8px;
    border-top: none;
    border-bottom: 0.5px solid var(--ios-separator);
    background: var(--primary);
  }
  
  .tab-item {
    flex: none;
    flex-direction: row;
    gap: 8px;
    font-size: 15px;
    padding: 8px 16px;
    border-radius: 8px;
    color: rgba(255,255,255,0.7);
  }
  
  .tab-item.active { 
    background: rgba(255,255,255,0.2); 
    color: white;
  }
  .tab-item svg { width: 20px; height: 20px; margin: 0; }
  
  .card { margin: 16px; }
}

/* Cards UI Styles */
.coord-bar {
  background: var(--ios-card);
  padding: 10px 16px;
  border-bottom: 0.5px solid var(--ios-separator);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}
.coord-display {
  font-family: 'SF Mono', ui-monospace, monospace;
  font-size: 14px;
  color: var(--ios-secondary);
  flex: 1;
}
.track-btn {
  background: var(--secondary);
  color: white;
  border: none;
  padding: 6px 14px;
  border-radius: 16px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
}
.track-btn.active { background: var(--accent); }

.raw-mode-btn {
  background: rgba(100,100,100,0.2);
  color: var(--ios-secondary);
  border: 1px solid var(--ios-separator);
  padding: 4px 10px;
  border-radius: 16px;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.15s ease;
}
.raw-mode-btn.active {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

.raw-share-btn {
  background: rgba(100,100,100,0.2);
  color: var(--ios-secondary);
  border: 1px solid var(--ios-separator);
  padding: 4px 10px;
  border-radius: 16px;
  font-size: 14px;
  cursor: pointer;
  transition: all 0.15s ease;
}
.raw-share-btn:hover {
  background: var(--primary-light);
  color: white;
}

.decode-banner {
  background: linear-gradient(135deg, var(--kereru-blue) 0%, var(--kereru-purple) 100%);
  color: white;
  padding: 8px 14px;
  text-align: center;
  font-size: 12px;
  font-weight: 500;
}

.passphrase-reminder {
  font-size: 11px;
  background: rgba(255,200,100,0.9);
  color: #333;
  padding: 6px 10px;
  text-align: center;
  font-weight: 500;
}
.obf-warning { background: rgba(200,180,255,0.9); }

.cards-container {
  padding: 12px;
}
.cards-container > * {
  margin-bottom: 12px;
  break-inside: avoid;
}
@media (min-width: 640px) {
  .cards-container { columns: 2; column-gap: 16px; padding: 16px; max-width: 800px; margin: 0 auto; }
}
@media (min-width: 1024px) {
  .cards-container { columns: 2; column-gap: 16px; }
}

/* 3x3 Grid Fullscreen */
.fs-overlay {
  position: fixed;
  inset: 0;
  background: #000;
  color: #fff;
  z-index: 2000;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  animation: fadeIn 0.2s forwards;
}
@keyframes fadeIn { to { opacity: 1; } }
.fs-code {
  font-family: 'SF Mono', 'Source Code Pro', monospace;
  font-weight: 600;
  text-align: center;
  word-break: break-all;
  max-width: 90vw;
}
.fs-footer { position: absolute; bottom: 40px; font-size: 14px; opacity: 0.5; }
.fs-hint { position: absolute; top: 40px; font-size: 12px; opacity: 0.35; }
.fs-fade { transition: opacity 1s ease; }

.fs-grid-3x3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(3, 1fr);
  gap: 3px;
  width: min(92vw, 92vh);
  height: min(92vw, 92vh);
  max-width: 600px;
  max-height: 600px;
  aspect-ratio: 1;
}
.fs-grid-cell {
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 6px;
  padding: 4px;
  overflow: hidden;
  font-family: 'SF Mono', ui-monospace, monospace;
  font-weight: 500;
  text-align: center;
  background: rgba(255,255,255,0.03);
  position: relative;
  line-height: 1.15;
  white-space: pre-line;
}
.fs-grid-cell.center {
  background: rgba(255,255,255,0.15);
  border: 2px solid rgba(255,255,255,0.5);
  font-weight: 700;
}
.fs-grid-cell.edge { opacity: 0.5; }
.fs-grid-cell::before {
  content: attr(data-direction);
  position: absolute;
  font-size: 8px;
  opacity: 0.35;
  font-family: system-ui, sans-serif;
  font-weight: 400;
}
.fs-grid-cell:nth-child(1)::before { top: 2px; left: 4px; }
.fs-grid-cell:nth-child(2)::before { top: 2px; left: 50%; transform: translateX(-50%); }
.fs-grid-cell:nth-child(3)::before { top: 2px; right: 4px; left: auto; }
.fs-grid-cell:nth-child(4)::before { top: 50%; left: 4px; transform: translateY(-50%); }
.fs-grid-cell:nth-child(5)::before { display: none; }
.fs-grid-cell:nth-child(6)::before { top: 50%; right: 4px; left: auto; transform: translateY(-50%); }
.fs-grid-cell:nth-child(7)::before { bottom: 2px; left: 4px; top: auto; }
.fs-grid-cell:nth-child(8)::before { bottom: 2px; left: 50%; top: auto; transform: translateX(-50%); }
.fs-grid-cell:nth-child(9)::before { bottom: 2px; right: 4px; left: auto; top: auto; }

.location-dot {
  position: absolute;
  width: 12px;
  height: 12px;
  background: rgba(255, 80, 80, 0.9);
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.9);
  transform: translate(-50%, -50%);
  z-index: 100;
  pointer-events: none;
  box-shadow: 0 0 8px rgba(255, 80, 80, 0.8);
}

.format-card {
  background: var(--ios-card);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
  transition: transform 0.15s ease, box-shadow 0.15s ease, opacity 0.2s;
}
.format-card.dragging {
  opacity: 0.85;
  transform: scale(1.02);
  box-shadow: 0 8px 24px rgba(0,0,0,0.18);
  z-index: 50;
}
.format-card.active-card {
  box-shadow: 0 0 0 3px var(--accent), 0 4px 12px rgba(108, 99, 255, 0.25);
  background: linear-gradient(135deg, rgba(108, 99, 255, 0.08) 0%, rgba(108, 99, 255, 0.03) 100%);
}
.format-card.active-card .card-header-row {
  background: linear-gradient(135deg, #5a52d4 0%, var(--primary) 100%);
}
.card-nav-btns { 
  display: flex; 
  flex-direction: column;
  gap: 0;
  margin-right: 8px;
}
.card-nav-btn {
  background: rgba(255,255,255,0.2);
  border: none;
  color: white;
  width: 20px;
  height: 14px;
  font-size: 10px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  line-height: 1;
  border-radius: 3px;
}
.card-nav-btn:hover { background: rgba(255,255,255,0.35); }
.card-nav-btn:disabled { opacity: 0.3; cursor: not-allowed; }
.drag-handle { display: none; } /* Hide old drag handle */
.card-header-row {
  display: flex;
  align-items: center;
  padding: 10px 12px;
  background: var(--primary);
  color: white;
}
.card-title { font-size: 13px; font-weight: 600; display: flex; align-items: center; gap: 6px; flex: 1; }
.card-actions { display: flex; gap: 6px; margin-left: auto; }
.card-btn {
  background: rgba(255,255,255,0.18);
  border: none;
  color: white;
  width: 26px;
  height: 26px;
  border-radius: 5px;
  cursor: pointer;
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.card-btn.close-btn { background: rgba(255,80,80,0.35); }
.card-btn.active-indicator { background: var(--accent); }
.card-body-inner { padding: 12px; min-height: 80px; }
.code-display {
  font-family: 'SF Mono', monospace;
  font-size: 18px;
  font-weight: 600;
  text-align: center;
  padding: 12px 6px;
  word-break: break-all;
  line-height: 1.35;
  min-height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.code-display.emoji { font-size: 24px; letter-spacing: 2px; }
.card-footer-row {
  padding: 10px 12px;
  border-top: 0.5px solid var(--ios-separator);
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.precision-row { display: flex; align-items: center; gap: 6px; flex: 1; }
.precision-display { font-size: 12px; color: var(--ios-secondary); font-family: 'SF Mono', monospace; }
.precision-controls { display: flex; gap: 4px; }
.precision-btn {
  width: 28px; height: 28px; border-radius: 6px;
  border: 1px solid var(--ios-separator);
  background: var(--ios-card);
  color: var(--ios-text);
  font-size: 16px; font-weight: 500;
  cursor: pointer;
}
.precision-btn:disabled { opacity: 0.25; cursor: not-allowed; }
.error-display { font-size: 11px; color: var(--accent); font-family: 'SF Mono', monospace; }
.footer-buttons { display: flex; gap: 6px; margin-left: auto; }
.action-btn {
  background: var(--primary);
  color: white;
  border: none;
  padding: 6px 10px;
  border-radius: 6px;
  font-size: 11px;
  cursor: pointer;
  white-space: nowrap;
}
.action-btn.secondary { background: var(--secondary); }
.action-btn.grid3x3 { background: var(--kereru-green); }
.action-btn.share { background: var(--kereru-purple); }

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s, visibility 0.2s;
}
.modal-backdrop.show { opacity: 1; visibility: visible; }
.modal {
  background: var(--ios-card);
  border-radius: 14px;
  width: 100%;
  max-width: 380px;
  max-height: 80vh;
  overflow: auto;
}
.modal-header {
  padding: 14px 16px;
  border-bottom: 0.5px solid var(--ios-separator);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.modal-title { font-size: 17px; font-weight: 600; }
.modal-close { background: none; border: none; font-size: 24px; cursor: pointer; color: var(--ios-secondary); padding: 4px 8px; }
.modal-body { padding: 16px; }
.input-group { margin-bottom: 14px; }
.input-group label { display: block; font-size: 13px; color: var(--ios-secondary); margin-bottom: 6px; }
.input-group input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--ios-separator);
  border-radius: 8px;
  font-size: 15px;
  background: var(--ios-light-gray);
  color: var(--ios-text);
}
.grid-preview {
  margin-top: 14px;
  overflow: auto;
  max-height: 200px;
  border: 1px solid var(--ios-separator);
  border-radius: 8px;
  padding: 8px;
}
.grid-preview table { border-collapse: collapse; font-size: 9px; }
.grid-preview td {
  border: 1px solid var(--ios-separator);
  padding: 1px;
  text-align: center;
  overflow: hidden;
}

.format-dropdown {
  position: fixed;
  background: var(--ios-card);
  border-radius: 10px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.25);
  z-index: 1000;
  min-width: 180px;
  overflow: hidden;
}
.dropdown-item {
  padding: 12px 16px;
  cursor: pointer;
  border-bottom: 0.5px solid var(--ios-separator);
  font-size: 14px;
  display: flex;
  justify-content: space-between;
}
.dropdown-item:last-child { border-bottom: none; }
.dropdown-item:hover { background: var(--ios-light-gray); }
.dropdown-item .check { color: var(--primary); }

.chroma-display { display: flex; flex-direction: column; align-items: center; gap: 6px; }
.chroma-canvas { border-radius: 6px; box-shadow: 0 2px 6px rgba(0,0,0,0.12); }
.barcode-display { display: flex; flex-direction: column; align-items: center; gap: 6px; }
.barcode-canvas { border-radius: 4px; }
.barcode-hex { font-family: 'SF Mono', ui-monospace, monospace; font-size: 12px; color: var(--ios-secondary); text-align: center; }
.music-display { display: flex; flex-direction: column; align-items: center; gap: 6px; }
.music-notation { width: 100%; min-height: 120px; display: flex; justify-content: center; align-items: center; overflow: hidden; }
.music-raw { font-family: 'SF Mono', monospace; font-size: 11px; color: var(--ios-secondary); }

/* Piano roll display */
.music-pianoroll {
  width: 100%;
  min-height: 140px;
  background: #0a0f0f;
  border-radius: 6px;
  overflow: hidden;
  /* Visibility controlled by inline style in JS (card-renderer / audio-ui) */
}
.music-pianoroll svg {
  display: block;
  width: 100%;
}

/* Piano roll toggle button in card header */
.piano-roll-toggle {
  font-family: 'SF Mono', ui-monospace, monospace !important;
  font-weight: 700 !important;
  font-size: 16px !important;
  line-height: 1;
}
.piano-roll-toggle.active {
  opacity: 1;
  color: var(--accent) !important;
}

@media (prefers-color-scheme: dark) {
  .music-pianoroll {
    background: #0a0f0f;
  }
}

@media (prefers-color-scheme: light) {
  .music-pianoroll {
    background: #1a1f2e;
  }
}

.toast {
  position: fixed;
  bottom: calc(var(--tab-height) + var(--safe-bottom) + 20px);
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0,0,0,0.8);
  color: white;
  padding: 12px 20px;
  border-radius: 20px;
  font-size: 14px;
  z-index: 2000;
  animation: toastIn 0.3s ease;
}
@keyframes toastIn { from { opacity: 0; transform: translateX(-50%) translateY(20px); } }

/* Splash screen */
.splash-screen {
  position: fixed;
  inset: 0;
  background: var(--ios-bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  opacity: 1;
  transition: opacity 0.5s ease;
}
.splash-screen.fade-out {
  opacity: 0;
  pointer-events: none;
}
.splash-title {
  font-family: 'Source Code Pro', 'SF Mono', ui-monospace, monospace;
  font-size: 36px;
  font-weight: 600;
  color: #333;
  margin-bottom: 8px;
}
.splash-author {
  font-family: 'Source Code Pro', 'SF Mono', ui-monospace, monospace;
  font-size: 16px;
  color: #666;
}
@media (prefers-color-scheme: dark) {
  .splash-title { color: #e0e0e0; }
  .splash-author { color: #999; }
}
/* ============================================
   DESKTOP LANDSCAPE LAYOUT (≥1024px)
   Side-by-side map (left) and controls (right)
   with horizontal drag handle
   ============================================ */

@media (min-width: 1024px) {
  html, body {
    margin: 0 !important;
    padding: 0 !important;
    overflow-x: hidden !important;
    width: 100vw !important;
    height: 100vh !important;
  }
  
  body {
    padding-bottom: 0 !important;
  }
  
  .app-container {
    display: flex !important;
    flex-direction: row !important;
    height: calc(100vh - 56px) !important;
    width: 100vw !important;
    max-width: none !important;
    margin: 0 !important;
    padding: 0 !important;
    box-sizing: border-box !important;
  }
  
  #sharedMapContainer {
    flex: 0 0 auto;
    width: 55%;
    min-width: 350px;
    max-width: calc(100vw - 350px);
    height: 100% !important;
    min-height: unset !important;
    max-height: unset !important;
    position: relative !important;
    display: flex !important;
    flex-direction: row !important;
  }
  
  #sharedMapContainer.hidden {
    display: flex !important;
  }
  
  #mapContainerMobile {
    flex: 1;
    height: 100% !important;
    min-height: unset !important;
    max-height: unset !important;
  }
  
  /* Vertical resize handle (NS resize) hidden on desktop */
  #mapResizeHandle {
    display: none !important;
  }
  
  /* Horizontal resize handle for landscape */
  #mapResizeHandleH {
    display: flex !important;
    width: 12px;
    height: 100%;
    background: var(--ios-light-gray);
    cursor: ew-resize;
    align-items: center;
    justify-content: center;
    touch-action: none;
    user-select: none;
    flex-shrink: 0;
  }
  
  #mapResizeHandleH::after {
    content: '';
    width: 4px;
    height: 40px;
    background: var(--ios-separator);
    border-radius: 2px;
  }
  
  #mapResizeHandleH:hover::after,
  #mapResizeHandleH:active::after {
    background: var(--primary);
  }
  
  .tab-content {
    flex: 1 1 auto !important;
    min-width: 350px !important;
    height: 100% !important;
    overflow-y: auto !important;
    overflow-x: hidden !important;
    box-sizing: border-box !important;
  }
  
  .tab-content.active {
    display: block !important;
  }
  
  /* Tab bar full width on desktop */
  .tab-bar {
    width: 100vw !important;
    max-width: 100vw !important;
  }
  
  /* Responsive card columns based on container width */
  .cards-container {
    max-width: none !important;
    padding: 12px !important;
    /* Default to 2 columns on desktop */
    columns: 2 !important;
    column-gap: 16px;
  }
  
  /* Coord bar cursor indicates clickable */
  .coord-bar {
    cursor: pointer;
  }
}

/* Container query support for card columns */
@supports (container-type: inline-size) {
  @media (min-width: 1024px) {
    .tab-content {
      container-type: inline-size;
      container-name: cardpanel;
    }
    
    /* Narrow panel: 1 column (up to 700px) */
    @container cardpanel (max-width: 700px) {
      .cards-container {
        columns: 1 !important;
      }
    }
    
    /* Medium panel: 2 columns */
    @container cardpanel (min-width: 698px) and (max-width: 1049px) {
      .cards-container {
        columns: 2 !important;
      }
    }
    
    /* Wide panel: 3 columns */
    @container cardpanel (min-width: 1050px) {
      .cards-container {
        columns: 3 !important;
      }
    }
  }
}

/* Fallback for browsers without container query support */
@supports not (container-type: inline-size) {
  /* Use viewport-based breakpoints as fallback */
  @media (min-width: 1024px) and (max-width: 1399px) {
    .cards-container {
      columns: 1 !important;
    }
  }
  
  @media (min-width: 1400px) and (max-width: 1799px) {
    .cards-container {
      columns: 2 !important;
    }
  }
  
  @media (min-width: 1800px) {
    .cards-container {
      columns: 3 !important;
    }
  }
}

/* Extra-wide screens: slightly larger map area */
@media (min-width: 1600px) {
  #sharedMapContainer {
    width: 60%;
  }
}

/* Hide horizontal resize handle on mobile/tablet (show only on desktop) */
@media (max-width: 1023px) {
  #mapResizeHandleH {
    display: none !important;
  }
}