* {
  box-sizing: border-box;
}

body {
  font-family: 'Inter', sans-serif;
  background-color: #f0f9ff;
}

.card {
  background-color: white;
  border-radius: 0.75rem;
  box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  overflow: hidden;
}

.panel {
  padding: 1.5rem;
  border: 1px solid var(--border-color);
  background-color: #fff;
  border-radius: 8px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
  display: flex;
  flex-direction: column;
}

.suite-outlined {
  font-family: 'Inter', sans-serif;
  font-weight: 900;
  color: white;
  text-shadow: -2px -2px 0 #1f2937, 2px -2px 0 #1f2937, -2px 2px 0 #1f2937, 2px 2px 0 #1f2937, -2px 0 0 #1f2937, 2px 0 0 #1f2937, 0 -2px 0 #1f2937, 0 2px 0 #1f2937;
}

/* Plate Mapper Specific Styles */
:root {
  --border-color: #d1d1d1;
  --background-color: #f8f9fa;
  --well-color: #e9ecef;
  --selected-border-color: #007bff;
  --selecting-bg-color: rgba(0, 123, 255, .2);
}

.app-container {
  display: flex;
  gap: 1.5rem;
  width: 90%;
  height: calc(120vh);
  max-width: 1500px;
  margin-top: 1rem;
}

#tools-panel {
  flex: 1;
  min-width: 310px;
  max-width: 320px;
  overflow-y: auto;
}

#center-column {
  flex: 3;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  min-width: 0;
}

#main-content {
  flex-shrink: 0.5;
  padding: 1.5rem;
}

#legend-panel {
  flex-grow: 1;
  min-height: 180px;
  overflow-y: auto;
}

#main-content h1 {
  text-align: center;
  margin-bottom: 0.25rem;
  flex-shrink: 0;
  font-size: 1.75rem;
  font-weight: bold;
  color: #374151;
}

#timestamp-display {
  text-align: center;
  font-size: 0.8rem;
  color: #6c757d;
  margin-bottom: 1rem;
  flex-shrink: 0;
}

#plate-grid-wrapper {
  position: relative;
}

/* --- PLATE GRID STYLES (96-Well Default) --- */
.plate-grid-container {
  display: grid;
  grid-template-columns: 40px repeat(12, 1fr);
  grid-template-rows: 40px repeat(8, auto);
  gap: 5px;
  height: auto;
  align-items: start;
}

.grid-label {
  font-weight: bold;
  color: #6c757d;
  font-size: clamp(0.7rem, 1.2vw, 1rem);
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  width: 100%;
}

.grid-label.clickable-header {
  cursor: pointer;
  border-radius: 4px;
  transition: background-color 0.2s, color 0.2s;
}

.grid-label.clickable-header:hover {
  background-color: #e5e7eb;
  color: #111827;
}

.well {
  width: 100%;
  aspect-ratio: 1/1;
  background-color: var(--well-color);
  border-radius: 50%;
  cursor: pointer;
  border: 2px solid transparent;
  position: relative;
  overflow: hidden;
  align-self: start;
}

@supports not (aspect-ratio: 1 / 1) {
  .well {
    height: 0;
    padding-bottom: 100%;
  }
}

/* --- NEW: 384-Well Plate Override Styles --- */
.plate-grid-container.plate-384 {
  grid-template-columns: 30px repeat(24, 1fr);
  /* 24 columns + label */
  grid-template-rows: 30px repeat(16, auto);
  /* 16 rows + label */
  gap: 2px;
  /* Denser grid */
}

.plate-grid-container.plate-384 .grid-label {
  font-size: clamp(0.6rem, 1vw, 0.75rem);
  /* Smaller labels */
}

.plate-grid-container.plate-384 .well {
  border-width: 1px;
  /* Thinner border for denser look */
}

/* --- END NEW STYLES --- */


#drag-select-box {
  position: absolute;
  background-color: var(--selecting-bg-color);
  border: 1px solid var(--selected-border-color);
  pointer-events: none;
  z-index: 100;
}

.well.selected {
  border-color: var(--selected-border-color);
  box-shadow: 0 0 0 3px rgba(0, 123, 255, .25);
}

.well.drag-preview {
  border-color: #28a745;
  box-shadow: 0 0 0 3px rgba(40, 167, 69, .4);
}

.well.dimmed {
  opacity: 0.15;
  filter: grayscale(80%);
  transition: opacity 0.2s, filter 0.2s;
}

.well.highlighted {
  box-shadow: 0 0 0 2px #343a40;
  z-index: 10;
  transform: scale(1.05);
  transition: transform 0.2s, box-shadow 0.2s;
}

.well .label-display {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  color: white;
  font-weight: bold;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.7);
  pointer-events: none;
  line-height: 1.1;
  overflow: hidden;
  z-index: 2;
}

.label-line-1,
.label-line-2 {
  width: 100%;
  white-space: nowrap;
  text-align: center;
}

.well::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  opacity: .8;
  z-index: 1;
  background-color: transparent;
}

/* SVG PATTERNS (UNCHANGED) */
.pattern-1::before {
  background-image: url("data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxMCIgaGVpZHRoPSIxMCI+PGNpcmNsZSBjeD0iNSIgY3k9IjUiIHI9IjEuNSIgZmlsbD0id2hpdGUiLz48L3N2Zz4=");
}

.pattern-2::before {
  background-image: url("data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSI4IiBoZWlnaHQ9IjgiPjxwYXRoIGQ9Ik0gNCAwIEwgNCA4IiBzdHJva2U9IndoaXRlIiBzdHJva2Utd2lkdGg9IjEuNSIvPjwvc3ZnPg==");
}

.pattern-3::before {
  background-image: url("data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSI4IiBoZWlnaHQ9IjgiPjxwYXRoIGQ9Ik0gMCA0IEwgOCA0IiBzdHJva2U9IndoaXRlIiBzdHJva2Utd2lkdGg9IjEuNSIvPjwvc3ZnPg==");
}

.pattern-4::before {
  background-image: url("data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxMCIgaGVpZHRoPSIxMCI+PHBhdGggZD0iTSAtMiAxMiBMIDEyIC0yIiBzdHJva2U9IndoaXRlIiBzdHJva2Utd2lkdGg9IjIiLz48L3N2Zz4=");
}

.pattern-5::before {
  background-image: url("data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxMCIgaGVpZHRoPSIxMCI+PHBhdGggZD0iTSAtMiAtMiBMIDEyIDEyIiBzdHJva2U9IndoaXRlIiBzdHJva2Utd2lkdGg9IjIiLz48L3N2Zz4=");
}

.pattern-6::before {
  background-image: url("data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSI4IiBoZWlnaHQ9IjgiPjxwYXRoIGQ9Ik0gNCAwIEwgNCA4IE0gMCA0IEwgOCA0IiBzdHJva2U9IndoaXRlIiBzdHJva2Utd2lkdGg9IjEiLz48L3N2Zz4=");
}

.pattern-7::before {
  background-image: url("data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxMiIgaGVpZHRoPSIxMiI+PGNpcmNsZSBjeD0iNiIgY3k9IjYiIHI9IjMiIGZpbGw9Im5vbmUiIHN0cm9rZT0id2hpdGUiIHN0cm9rZS1width9IjEuNSIvPjwvc3ZnPg==");
}

.pattern-8::before {
  background-image: url("data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxNSIgaGVpZHRoPSIxNSI+PHBhdGggZD0iTSAwIDcuNSBDIDUgMCwgMTAgMCwgMTUgNy41IiBzdHJva2U9IndoaXRlIiBmaWxsPSJub25lIiBzdHJva2Utd2lkdGg9IjEuNSIvPjwvc3ZnPg==");
}

.pattern-9::before {
  background-image: url("data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxMCIgaGVpZHRoPSIxMCI+PHBhdGggZD0iTSAtMiAxMiBMIDEyIC0yIE0gLTIgLTIgTCAxMiAxMiIgc3Ryb2tlPSJ3aGl0ZSIgc3Ryb2tlLXdpZHRoPSIxLjUiLz48L3N2Zz4=");
}

.pattern-10::before {
  background-image: url("data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxNSIgaGVpZHRoPSIxNSI+PGNpcmNsZSBjeD0iNy41IiBjeT0iNy41IiByPSI2IiBmaWxsPSJub25lIiBzdHJva2U9IndoaXRlIiBzdHJva2Utd2lkdGg9IjEiLz48Y2lyY2xlIGN4PSI3LjUiIGN5PSI3LjUiIHI9IjMiIGZpbGw9IndoaXRlIi8+PC9zdmc+");
}

.pattern-11::before {
  background-image: url("data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIyMCIgaGVpZHRoPSIyMCI+IDxwYXRoIGQ9Ik0gMTAgMCBMIDEwIDIwIE0gMCAxMCBMIDIwIDEwIiBzdHJva2U9IndoaXRlIiBzdHJva2Utd2lkdGg9IjEiLz4gPHBhdGggZD0iTSAyMCAwIEwgMCAyMCBNIDAgMCBMIDIwIDIwIiBzdHJva2U9IndoaXRlIiBzdHJva2Utd2lkdGg9IjAuNSIgc3Ryb2tlLWRhc2hhcnJheT0iNCAyIi8+PC9zdmc+");
}

.pattern-12::before {
  background-image: url("data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxMiIgaGVpZHRoPSIxMiI+PHBhdGggZD0iTSAwIDAgTCAxMiAxMiBNIDEyIDAgTCAwIDEyIiBzdHJva2U9IndoaXRlIiBzdHJva2Utd2lkdGg9IjEiLz48cGF0aCBkPSJNIDYgMCBMIDYgMTIgTSAwIDYgTCAxMiA2IiBzdHJva2U9IndoaXRlIiBzdHJva2Utd2lkdGg9IjAuNSIvPjwvc3ZnPg==");
}

.pattern-13::before {
  background-image: url("data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxMCIgaGVpZHRoPSIxMCI+PHBhdGggZD0iTSAyIDAgTCAyIDEwIE0gNyAwIEwgNyAxMCIgc3Ryb2tlPSJ3aGl0ZSIgc3Ryb2tlLXdpZHRoPSIyIi8+PC9zdmc+");
}

.pattern-14::before {
  background-image: url("data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIyMCIgaGVpZHRoPSIyMCI+PHBhdGggZD0iTSAxMCAwIEwgMCAxMCBMIDEwIDIwIEwgMjAgMTAgWiIgZmlsbD0ibm9uZSIgc3Ryb2tlPSJ3aGl0ZSIgc3Ryb2tlLXdpZHRoPSIyIi8+PC9zdmc+");
}

.pattern-15::before {
  background-image: url("data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxMCIgaGVpZHRoPSIxMCI+PHBhdGggZD0iTSAwIDAgTCA1IDUgTCAwIDEwIFogTSAxMCAwIEwgNSA1IEwgMTAgMTggWiIgZmlsbD0id2hpdGUiLz48L3N2Zz4=");
}

.pattern-16::before {
  background-image: url("data:image/svg+xml;base6T0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxNSIgaGVpZHRoPSIxNSI+PGNpcmNsZSBjeD0iNSIgY3k9IjUiIHI9IjQiIGZpbGw9Im5vbmUiIHN0cm9rZT0id2hpdGUiIHN0cm9rZS1width9IjEiLz48Y2lyY2xlIGN4PSIxMCIgY3k9IjEwIiByPSI0IiBmaWxsPSJub25lIiBzdHJva2U9IndoaXRlIiBzdHJva2Utd2lkdGg9IjEiLz48L3N2Zz4=");
}

/* Controls Panel & UI Elements */
.control-section h2 {
  font-size: 1.1rem;
  margin-top: 0;
  padding-bottom: .5rem;
  border-bottom: 1px solid var(--border-color);
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-weight: 500;
  margin-bottom: .3rem;
}

.form-group.checkbox-group label {
  margin-bottom: 0;
  font-weight: normal;
}

.form-group input,
.form-group select {
  width: 100%;
  padding: .5rem;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  box-sizing: border-box;
}

.form-accordion {
  margin-bottom: 1.25rem;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  overflow: hidden;
}

.form-accordion summary {
  padding: 0.75rem 1rem;
  background-color: #f8f9fa;
  font-weight: 600;
  cursor: pointer;
  user-select: none;
  list-style: none;
  /* Hide default triangle in some browsers */
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.form-accordion summary::-webkit-details-marker {
  display: none;
  /* Hide default triangle in Safari/Chrome */
}

.form-accordion summary::after {
  content: '+';
  font-size: 1.25rem;
  line-height: 1;
  color: #6c757d;
  transition: transform 0.2s;
}

.form-accordion[open] summary::after {
  content: '−';
  /* Minus sign, not hyphen */
}

.form-accordion[open] summary {
  border-bottom: 1px solid var(--border-color);
}

.accordion-content {
  padding: 1rem;
  background-color: white;
}

.accordion-content .form-group:last-child {
  margin-bottom: 0;
}

.dose-group {
  display: flex;
  gap: .5rem;
}

.dose-group>div:first-child {
  flex: 2;
}

.dose-group>div:last-child {
  flex: 1;
}

.button-group {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .5rem;
}

button {
  padding: .6rem;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-weight: bold;
  transition: all .2s ease-in-out;
}

.sleek-btn {
  padding: 0.8rem 1rem;
  border-width: 3px;
  border-style: solid;
  border-radius: 10px;
  background-color: #fff;
  font-weight: 200;
  text-align: center;
  color: var(--btn-color);
  border-color: var(--btn-color);
  margin-top: .5rem;
}

.sleek-btn:hover {
  color: #fff;
  background-color: var(--btn-color);
  box-shadow: 0 0 12px -2px var(--btn-color);
}

#apply-btn {
  --btn-color: #28a745;
}

#clear-btn {
  --btn-color: #dc3545;
}

#save-btn {
  --btn-color: #007bff;
}

#load-btn {
  --btn-color: #ffc107;
}

#export-png-btn {
  --btn-color: #fd7e14;
}

#export-pdf-btn {
  --btn-color: #17a2b8;
}

#deselect-btn {
  --btn-color: #6c757d;
}

#undo-btn,
#redo-btn {
  --btn-color: #6c757d;
}

#apply-dilution-btn {
  --btn-color: #563d7c;
}

#load-btn:hover {
  color: #212529;
}

.instructions {
  font-size: .8rem;
  color: #6c757d;
  margin-top: 1rem;
  text-align: center;
}

.hidden {
  display: none !important;
}

/* Tab Styles */
.tabs-container {
  display: flex;
  border-bottom: 2px solid var(--border-color);
  margin-bottom: 1.5rem;
}

.tab-btn {
  flex: 1;
  background-color: transparent;
  color: #6c757d;
  border: none;
  padding: 0.75rem 0;
  font-size: 1rem;
  font-weight: 600;
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
}

.tab-btn.active {
  color: var(--selected-border-color);
  border-color: var(--selected-border-color);
}

.mode-toggle {
  display: flex;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  overflow: hidden;
  margin-bottom: 1.5rem;
}

.mode-toggle button {
  flex: 1;
  background-color: #fff;
  color: #495057;
  border-radius: 0;
  border: none;
  padding: .5rem;
  font-weight: 500;
}

.mode-toggle button.active {
  background-color: var(--selected-border-color);
  color: #fff;
}

/* Legend Styles */
#legend-panel h2 {
  font-size: 1.25rem;
  font-weight: bold;
  color: #374151;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-color);
}

#legend-content-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.legend-section h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.legend-container {
  display: flex;
  flex-direction: column;
  gap: .5rem;
  margin-bottom: 1rem;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: .75rem;
  position: relative;
}

.legend-color-box {
  width: 20px;
  height: 20px;
  border: 1px solid var(--border-color);
  flex-shrink: 0;
  border-radius: 4px;
  cursor: pointer;
}

.legend-label {
  font-size: .9rem;
  word-break: break-word;
  flex-grow: 1;
}

.legend-pattern-box {
  width: 20px;
  height: 20px;
  border: 1px solid var(--border-color);
  flex-shrink: 0;
  border-radius: 4px;
  background-color: black;
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.legend-pattern-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 1;
}

.legend-pattern-item .legend-label {
  border: none;
  outline: none;
  font-size: .9rem;
  flex-grow: 1;
  padding: 2px 0;
  background-color: transparent;
  width: 100%;
  border-bottom: 1px solid transparent;
}

.legend-pattern-item .legend-label:focus {
  border-bottom: 1px solid #ccc;
}

/* Modal Styles */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, .5);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-backdrop.hidden {
  display: none;
}

.modal {
  background-color: #fff;
  padding: 1.5rem;
  border-radius: 8px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, .3);
  min-width: 300px;
  z-index: 1001;
}

.modal h3 {
  margin-top: 0;
}

#modal-content {
  margin: 1.5rem 0;
}

#modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: .5rem;
}

#pattern-selector-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}

#pattern-selector-grid .legend-pattern-box {
  width: 50px;
  height: 50px;
  border: 2px solid var(--border-color);
}

#pattern-selector-grid .legend-pattern-box.selected {
  border-color: var(--selected-border-color);
  box-shadow: 0 0 0 3px rgba(0, 123, 255, .25);
}

@media (max-width: 1024px) {
  .app-container {
    flex-direction: column;
    height: auto;
  }

  #tools-panel {
    max-width: 100%;
    min-height: auto;
  }

  #center-column {
    width: 100%;
  }

  .plate-grid-container {
    overflow-x: auto;
  }
}

#tooltip {
  position: absolute;
  background-color: rgba(33, 37, 41, 0.95);
  color: white;
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 0.85rem;
  pointer-events: none;
  z-index: 1000;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  white-space: nowrap;
  backdrop-filter: blur(4px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transform: translate(-50%, -100%);
  margin-top: -10px;
}

#tooltip::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  margin-left: -5px;
  border-width: 5px;
  border-style: solid;
  border-color: rgba(33, 37, 41, 0.95) transparent transparent transparent;
}

/* Empty State Prompt */
.empty-state {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(255, 255, 255, 0.35);
  z-index: 50;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.empty-state.hidden {
  opacity: 0;
  pointer-events: none;
  display: none;
}

.empty-state-content {
  background-color: white;
  padding: 1.5rem 2rem;
  border-radius: 8px;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  border: 1px solid var(--border-color);
  text-align: center;
  color: #4b5563;
  font-weight: 500;
  /* Allow clicking through if needed, though mostly visual */
}