/* main.css: Modern responsive design for Markov Model experiment */
:root {
  --color-primary: #4361ee;
  --color-primary-light: #4895ef;
  --color-primary-dark: #3a0ca3;
  --color-secondary: #4cc9f0;
  --color-secondary-light: #72efdd;
  --color-secondary-dark: #3f8efc;
  --color-accent: #f72585;
  --color-accent-light: #ff8fab;
  --color-accent-dark: #b5179e;
  --color-success: #4caf50;
  --color-error: #f44336;
  --color-neutral-50: #f8fafc;
  --color-neutral-100: #f1f5f9;
  --color-neutral-200: #e2e8f0;
  --color-neutral-300: #cbd5e1;
  --color-neutral-400: #94a3b8;
  --color-neutral-500: #64748b;
  --color-neutral-600: #475569;
  --color-neutral-700: #334155;
  --color-neutral-800: #1e293b;
  --color-neutral-900: #0f172a;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --shadow-md: 0 4px 6px -1px rgba(67, 97, 238, 0.08),
    0 2px 4px -1px rgba(67, 97, 238, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(67, 97, 238, 0.1),
    0 4px 6px -2px rgba(67, 97, 238, 0.05);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, sans-serif;
  line-height: 1.6;
  color: var(--color-neutral-800);
  background-color: var(--color-neutral-50);
  font-size: 0.97em;
  min-height: 100vh;
  overflow-x: visible;
}

.container {
  max-width: 100vw;
  width: 100vw;
  margin: 0 auto;
  padding: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
  overflow-x: auto;
}

.main-content {
  width: 90%; /* Reasonable width with margins on both sides */
  max-width: 1400px; /* Maximum width for very large screens */
  margin: 0 auto;
  padding: 0;
  box-sizing: border-box;
  min-width: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* Instructions Panel Wrapper */
#instructions-panel {
  width: 80%; /* 80% of main-content width */
  margin: 0 auto;
  order: 0;
  box-sizing: border-box;
}

.instructions-header {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem; /* Slightly smaller */
  font-weight: 700;
  color: #22223b;
  background: transparent;
  margin: 0;
  padding: 0; /* Remove padding since bar handles it */
  cursor: pointer;
  user-select: none;
  border-radius: 0; /* Let the bar handle border-radius */
  transition: none; /* Remove transition */
  letter-spacing: 0.01em;
}

/* Instructions Panel */
#instructions-bar {
  width: 90%; /* Match main-content width */
  max-width: 1400px; /* Match main-content max-width */
  margin: 1rem auto;
  background: linear-gradient(90deg, #6ef2e6 0%, #4895ef 100%);
  border-radius: 1.2rem 1.2rem 0 0; /* Only top corners curved */
  cursor: pointer;
  user-select: none;
  transition: none; /* Remove transition to prevent highlighting */
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  box-shadow: var(--shadow-md);
  padding: 0.8rem 1.5rem; /* Reduced padding for smaller height */
  border: 1px solid var(--color-neutral-200);
  box-sizing: border-box;
  order: 0; /* Ensure it appears first */
}

.instructions-content {
  width: 90%; /* Match instructions-bar width */
  max-width: 1400px; /* Match instructions-bar max-width */
  margin: 0 auto 1.5rem auto;
  background: #fff;
  border: 1px solid var(--color-neutral-200);
  border-top: none;
  border-radius: 0; /* Flat bottom - no curved corners */
  padding: 1.2rem 1.5rem;
  box-shadow: var(--shadow-md);
  display: none;
}

.instructions-title-wrapper {
  display: flex;
  align-items: center;
  gap: 10px;
  justify-content: center;
}

.instructions-label {
  font-weight: 700;
  color: var(--color-primary-dark);
  font-size: 1.2em;
  letter-spacing: 0.01em;
  text-align: center;
  margin: 0;
}

.arrow-icon {
  font-size: 1rem;
  color: var(--color-primary-dark);
  transition: transform 0.3s ease;
  transform: rotate(0deg); /* Default state: down arrow when collapsed */
}

.arrow-icon.rotated {
  transform: rotate(180deg); /* Rotated state: up arrow when expanded */
}

/* Main Layout - Base styles for mobile/tablet */
#main-2pane-container {
  display: flex;
  gap: 2rem;
  margin-top: 2rem;
  width: 100%;
  max-width: 1400px;
  margin-left: auto;
  margin-right: auto;
}

#left-pane {
  flex: 0 0 300px; /* Fixed width instead of flex: 1 */
  min-width: 300px;
  margin-right: 1rem;
}

#right-pane {
  flex: 1; /* Takes remaining space */
  min-width: 0; /* Allows flex item to shrink below content size */
  width: calc(100% - 320px); /* Full width minus left pane and gap */
}

/* Pane Sections */
#corpus-selection,
#corpus-info {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 1rem;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-neutral-200);
}

.markov-matrices-section {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 0.5rem;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-neutral-200);
  width: fit-content;
  max-width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center; /* Center all child elements horizontally */
}

/* Matrix container improvements */
.matrix-container {
  width: 100%;
  overflow-x: auto;
  margin-bottom: 2rem;
  padding: 1rem;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* Matrix containers for responsive behavior */
.emission-matrix-container,
.transition-matrix-container {
  width: fit-content;
  max-width: 100%;
  overflow-x: visible;
  margin-bottom: 1rem;
  display: block; /* Changed from inline-block to block for better centering */
}

/* Matrix containers when inside markov-matrices section */
.markov-matrices-section .emission-matrix-container,
.markov-matrices-section .transition-matrix-container {
  width: 100%;
  max-width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  box-sizing: border-box;
}

/* Table containers inside markov-matrices section */
.markov-matrices-section .markov-table-container {
  width: 100%;
  max-width: 100%;
  display: block;
  box-sizing: border-box;
}

/* Tables inside markov-matrices section */
.markov-matrices-section .emission-matrix-table,
.markov-matrices-section .transition-matrix-table {
  width: 100%;
  max-width: 100%;
  table-layout: auto; /* Changed from fixed to auto */
  margin: 0 auto;
}

/* Matrix containers when inside markov-answers section */
.markov-answers-section .emission-matrix-container,
.markov-answers-section .transition-matrix-container {
  width: 100%;
  max-width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  box-sizing: border-box;
}

/* Section titles inside matrix containers in answers section */
.markov-answers-section .emission-matrix-container .markov-section-title,
.markov-answers-section .transition-matrix-container .markov-section-title {
  text-align: center;
  width: 100%;
  margin-bottom: 1rem;
}

/* Tables inside matrix containers in answers section */
.markov-answers-section .emission-matrix-table,
.markov-answers-section .transition-matrix-table {
  width: 100% !important;
  max-width: 100%;
  margin: 0 auto;
  table-layout: auto; /* Changed from fixed to auto */
}

/* Ensure tables don't force horizontal scrolling on desktop */
.markov-table,
.emission-matrix-table,
.transition-matrix-table {
  width: auto;
}

.markov-feedback-section,
.markov-answers-section {
  background: var(--color-neutral-50);
  border-radius: var(--radius-lg);
  padding: 1rem;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-neutral-200);
  display: none;
}

.markov-feedback-section.visible,
.markov-answers-section.visible {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

/* Section Titles */
.markov-section-title {
  color: var(--color-primary-dark);
  font-size: 1.3em;
  margin: 0 0 0.75rem 0;
  font-weight: 700;
  letter-spacing: 0.01em;
}

/* ===== MATRIX TABLE STYLES - Content-Based Column Widths ===== */

/* Emission and Transition Matrix Tables */
.emission-matrix-table,
.transition-matrix-table {
  width: 100%;
  table-layout: auto; /* Allow content-based sizing */
  border-collapse: separate;
  border-spacing: 2px;
  font-size: 14px;
  margin: 0 auto;
  background: white;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

/* Header styling for better spacing */
.emission-matrix-table th,
.transition-matrix-table th {
  background: #f8f9fa;
  border: 1px solid #dee2e6;
  padding: 8px 6px;
  text-align: center;
  font-weight: 600;
  font-size: 13px;
  white-space: nowrap;
  min-width: 60px; /* Minimum width for headers */
  word-break: break-word;
}

/* Row headers (first column) */
.emission-matrix-table th:first-child,
.transition-matrix-table th:first-child,
.emission-matrix-table td:first-child,
.transition-matrix-table td:first-child {
  background: #e9ecef;
  font-weight: 600;
  min-width: 80px;
  width: 80px;
  text-align: center;
  position: sticky;
  left: 0;
  z-index: 2;
}

/* Table headers - make word columns responsive to content */
.emission-matrix-table th {
  background: linear-gradient(
    135deg,
    var(--color-primary),
    var(--color-primary-light)
  );
  color: white;
  font-weight: 600;
  text-align: center;
  padding: 8px 6px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  font-size: 0.9rem;
  white-space: nowrap;
}

.transition-matrix-table th {
  background: linear-gradient(
    135deg,
    var(--color-primary),
    var(--color-primary-light)
  );
  color: white;
  font-weight: 600;
  text-align: center;
  padding: 8px 6px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  font-size: 0.9rem;
  white-space: nowrap;
}

/* POS tag labels (first column) */
.emission-matrix-table th:first-child,
.transition-matrix-table th:first-child {
  background: linear-gradient(
    135deg,
    var(--color-accent),
    var(--color-accent-light)
  );
  font-weight: 700;
  text-align: left;
  padding-left: 12px;
  min-width: 80px;
  font-size: 1rem;
}

/* Table cells */
.emission-matrix-table td,
.transition-matrix-table td {
  border: 1px solid #dee2e6;
  padding: 6px 4px;
  text-align: center;
  min-width: 60px;
  font-size: 13px;
  background: white;
  transition: all 0.2s ease;
}

/* POS labels in first column */
.emission-matrix-table td:first-child,
.transition-matrix-table td:first-child {
  background: var(--color-neutral-100);
  font-weight: 600;
  text-align: left;
  padding-left: 12px;
  color: var(--color-neutral-700);
  border-right: 2px solid var(--color-neutral-300);
}

/* Input fields within tables */
.emission-matrix-table input,
.transition-matrix-table input {
  width: 100%;
  max-width: 60px;
  padding: 4px;
  border: 1px solid #ced4da;
  border-radius: 3px;
  text-align: center;
  font-size: 12px;
  box-sizing: border-box;
  background: white;
  transition: all 0.2s ease;
  min-height: 28px;
}

.emission-matrix-table input:focus,
.transition-matrix-table input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(67, 97, 238, 0.1);
  background: var(--color-neutral-50);
}

/* Hover effects */
.emission-matrix-table tr:hover td,
.transition-matrix-table tr:hover td {
  background: var(--color-neutral-50);
}

.emission-matrix-table td:hover,
.transition-matrix-table td:hover {
  background: rgba(72, 239, 221, 0.1) !important;
  transform: scale(1.02);
  z-index: 10;
  box-shadow: var(--shadow-md);
}

/* Alternating row colors */
.emission-matrix-table tbody tr:nth-child(even) td,
.transition-matrix-table tbody tr:nth-child(even) td {
  background: var(--color-neutral-50);
}

.emission-matrix-table tbody tr:nth-child(even) td:first-child,
.transition-matrix-table tbody tr:nth-child(even) td:first-child {
  background: var(--color-neutral-200);
}

/* Dropdowns */
select,
.markov-dropdown {
  width: 100%;
  background: var(--color-neutral-100);
  border: 2px solid var(--color-neutral-300);
  border-radius: var(--radius-md);
  color: var(--color-neutral-800);
  padding: 0.75rem 1rem;
  font-size: 1rem;
  font-weight: 500;
  margin-bottom: 1rem;
  box-shadow: var(--shadow-md);
  transition: all 0.2s ease;
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
  background-position: right 0.5rem center;
  background-repeat: no-repeat;
  background-size: 1.5rem 1.5rem;
  padding-right: 2.5rem;
}

select:hover,
.markov-dropdown:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-lg);
}

select:focus,
.markov-dropdown:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.1);
  outline: none;
}

/* Tables */
.markov-table,
.emission-matrix-table,
.transition-matrix-table {
  width: auto;
  border-collapse: collapse;
  margin: 1rem 0;
  background: #fff;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-neutral-200);
  table-layout: auto;
  display: table;
}

.markov-table-container {
  margin: 1rem 0;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  -webkit-overflow-scrolling: touch;
  width: fit-content;
  max-width: 100%;
  overflow-x: visible;
  display: inline-block;
}

/* Table containers inside matrix containers in answers section */
.markov-answers-section .markov-table-container {
  margin: 0;
  width: 100%;
  max-width: 100%;
  display: block;
  overflow-x: auto;
  box-sizing: border-box;
}

.markov-table th,
.emission-matrix-table th,
.transition-matrix-table th {
  background: var(--color-primary);
  color: #fff;
  padding: 0.75rem 0.5rem;
  font-weight: 600;
  text-align: center;
  border: 1px solid var(--color-primary-dark);
  white-space: nowrap;
  min-width: 60px;
}

.markov-table td,
.emission-matrix-table td,
.transition-matrix-table td {
  padding: 0.5rem 0.35rem;
  text-align: center;
  border: 1px solid var(--color-neutral-200);
  background: var(--color-neutral-50);
  transition: background-color 0.2s;
  min-width: 60px;
  white-space: nowrap;
}

.markov-table td:hover,
.emission-matrix-table td:hover,
.transition-matrix-table td:hover {
  background: var(--color-neutral-100);
}

/* Table Inputs */
.markov-table input[type="text"],
.emission-matrix-table input[type="text"],
.transition-matrix-table input[type="text"] {
  width: 100%;
  max-width: 90px;
  margin: 0;
  text-align: center;
  background: #fff;
  border: 2px solid var(--color-neutral-300);
  border-radius: var(--radius-md);
  padding: 0.35rem 0.2rem;
  font-size: 0.9rem;
  transition: all 0.2s ease;
}

.markov-table input[type="text"]:focus,
.emission-matrix-table input[type="text"]:focus,
.transition-matrix-table input[type="text"]:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.1);
  outline: none;
}

.markov-table input[type="text"]:hover,
.emission-matrix-table input[type="text"]:hover,
.transition-matrix-table input[type="text"]:hover {
  border-color: var(--color-primary-light);
}

/* Buttons */
.markov-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
  justify-content: center;
}

.markov-controls button,
button {
  border: none;
  border-radius: 2.2rem;
  font-size: 1rem;
  font-weight: 700;
  padding: 0.6rem 1.2rem;
  margin: 0.1rem;
  box-shadow: var(--shadow-md);
  transition: all 0.2s ease;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 40px;
  text-decoration: none;
  min-width: 110px;
  justify-content: center;
}

.primary-button,
button[type="submit"],
.markov-controls button:first-child {
  background: linear-gradient(
    90deg,
    var(--color-primary) 60%,
    var(--color-secondary) 100%
  );
  color: #fff;
}

.primary-button:hover,
button[type="submit"]:hover,
.markov-controls button:first-child:hover {
  background: linear-gradient(
    90deg,
    var(--color-primary-dark) 60%,
    var(--color-accent) 100%
  );
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.secondary-button,
button[type="button"],
.markov-controls button:not(:first-child) {
  background: linear-gradient(
    90deg,
    var(--color-secondary) 60%,
    var(--color-accent-light) 100%
  );
  color: #fff;
}

.secondary-button:hover,
button[type="button"]:hover,
.markov-controls button:not(:first-child):hover {
  background: linear-gradient(
    90deg,
    var(--color-secondary-dark) 60%,
    var(--color-accent) 100%
  );
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* Feedback and Messages */
.markov-feedback,
.feedback-message {
  padding: 1rem;
  margin: 1rem 0;
  border-radius: var(--radius-md);
  border-left: 4px solid;
  font-weight: 500;
}

.feedback-success {
  background: rgba(76, 175, 80, 0.1);
  border-left-color: var(--color-success);
  color: var(--color-success);
}

.feedback-error {
  background: rgba(244, 67, 54, 0.1);
  border-left-color: var(--color-error);
  color: var(--color-error);
}

.feedback-info {
  background: rgba(67, 97, 238, 0.1);
  border-left-color: var(--color-primary);
  color: var(--color-primary);
}

/* Utility Classes */
.text-center {
  text-align: center;
}
.mb-1 {
  margin-bottom: 1rem;
}
.mt-1 {
  margin-top: 1rem;
}
.hidden {
  display: none;
}
.visible {
  display: block;
}

/* Highlight Classes */
.highlight-correct {
  border-color: var(--color-success) !important;
  background: rgba(76, 175, 80, 0.1) !important;
}

.highlight-incorrect {
  border-color: var(--color-error) !important;
  background: rgba(244, 67, 54, 0.1) !important;
}

.transition-matrix-header,
.emission-matrix-header {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 1rem;
}

.transition-matrix-header .markov-section-title,
.emission-matrix-header .markov-section-title {
  text-align: center;
  width: 100%;
  font-size: 1.4em;
  margin-bottom: 0.5rem;
  color: var(--color-primary-dark);
  font-weight: 700;
  position: relative;
  display: inline-block;
}

/* Info icon styling similar to word analysis simulation */
.info-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: white;
  font-size: 0.8rem;
  margin-left: 0.5rem;
  cursor: help;
  transition: background-color 0.2s ease;
  vertical-align: middle;
}

.info-icon:hover {
  background-color: var(--color-primary-dark);
}

.info-icon:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* POS Details Modal Styling */
.pos-modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(2px);
}

.pos-modal-content {
  position: relative;
  margin: 10vh auto;
  width: 90%;
  max-width: 600px;
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.pos-modal-header {
  background: var(--color-primary);
  color: white;
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.pos-modal-header h3 {
  margin: 0;
  font-size: 1.2rem;
  font-weight: 600;
}

.pos-modal-close {
  color: white;
  font-size: 2rem;
  font-weight: bold;
  cursor: pointer;
  line-height: 1;
  padding: 0 0.5rem;
  border-radius: 50%;
  transition: background-color 0.2s ease;
}

.pos-modal-close:hover {
  background-color: rgba(255, 255, 255, 0.2);
}

.pos-modal-body {
  background: white;
  padding: 1.5rem;
  max-height: 60vh;
  overflow-y: auto;
}

.pos-detail-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1rem;
  padding: 0.75rem;
  border-radius: var(--radius-md);
  background: var(--color-neutral-50);
  border-left: 4px solid var(--color-primary);
}

.pos-detail-tag {
  background: var(--color-primary);
  color: white;
  padding: 0.3rem 0.6rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.9rem;
  min-width: 3.5rem;
  text-align: center;
  flex-shrink: 0;
}

.pos-detail-description {
  color: var(--color-neutral-700);
  font-size: 0.95rem;
  line-height: 1.5;
  flex: 1;
}

/* Message styling */
.feedback-message,
.success-message,
.error-message,
.info-message {
  padding: 1em 1.2em;
  margin: 1em 0;
  border-radius: var(--radius-md);
  font-size: 1.05em;
  font-weight: 500;
  box-shadow: var(--shadow-md);
}

.success-message {
  background: #e8f5e8;
  color: #2e7d32;
  border: 1px solid #4caf50;
  border-left: 4px solid #4caf50;
}

.error-message {
  background: #ffeaea;
  color: #c62828;
  border: 1px solid #f44336;
  border-left: 4px solid #f44336;
}

.info-message {
  background: var(--color-secondary-light);
  color: var(--color-primary-dark);
  border: 1px solid var(--color-primary-light);
  border-left: 4px solid var(--color-primary);
}

.feedback-message {
  background: #fff3e0;
  color: #ef6c00;
  border: 1px solid #ff9800;
  border-left: 4px solid #ff9800;
}

/* Markov-specific elements */
.markov-sentence {
  font-size: 1.15em;
  background: var(--color-neutral-100);
  padding: 8px 12px;
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  display: inline-block;
  border: 1px solid var(--color-primary-light);
}

.markov-feedback {
  margin-top: 16px;
  min-height: 24px;
  font-size: 1.1em;
}

.markov-hint {
  background: var(--color-secondary-light);
  border-left: 4px solid var(--color-primary);
  padding: 8px 12px;
  margin: 10px 0;
  border-radius: var(--radius-md);
  font-size: 1em;
  color: var(--color-primary-dark);
  width: fit-content;
  max-width: 100%;
}

/* Accuracy display */
#accuracy_ans {
  color: #2e7d32;
  font-size: 1.2em;
  font-weight: bold;
  margin-top: 1em;
}

/* Readonly input styling */
input[readonly] {
  background: #f5f5f5;
  border: 1px solid #ccc;
  color: #333;
  padding: 0.3em 0.7em;
  margin: 0.2em 0.5em 0.2em 0;
  border-radius: 4px;
}

/* DESKTOP OPTIMIZATIONS (>900px) - Dynamic layout features */
@media (min-width: 901px) {
  .main-content {
    width: 95%; /* Increased from 90% to give more overall width */
    max-width: 1600px; /* Increased max-width for larger screens */
    padding: 0;
  }

  #instructions-bar,
  #instructions-content {
    width: 100%;
    max-width: none;
    margin-left: auto;
    margin-right: auto;
  }

  /* Desktop-specific 2-pane layout - Better proportions */
  #main-2pane-container {
    flex-direction: row;
    gap: 2%; /* Reduced gap from 4% to 2% */
    max-width: none;
    width: 100%; /* Full width of main-content instead of 80% */
    margin: 0; /* Remove auto centering, align to left */
    justify-content: flex-start;
    align-items: flex-start;
    overflow-x: visible;
    padding: 0;
  }

  #left-pane {
    flex: 0 0 18%; /* Reduced from 24% to 18% */
    max-width: 18%;
    min-width: 200px; /* Increased minimum width slightly */
    width: 18%;
    margin-left: 0; /* Ensure it's flush left */
  }

  #right-pane {
    flex: 0 0 80%; /* Increased from 72% to 80% (18% + 2% + 80% = 100%) */
    max-width: 80%;
    min-width: 0;
    width: 80%;
    overflow-x: visible;
  }

  /* Make markov-matrices-section expand to fill right pane */
  .markov-matrices-section {
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%; /* Full width of right pane */
    max-width: 100%;
    padding: 1rem; /* Restored padding */
  }

  /* Matrix containers should use full available width */
  .markov-matrices-section .emission-matrix-container,
  .markov-matrices-section .transition-matrix-container {
    width: 100%;
    max-width: 100%;
    margin: 1rem 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    overflow-x: auto; /* Allow horizontal scrolling if needed */
    box-sizing: border-box;
  }

  /* Table containers should expand to fit content up to container width */
  .markov-matrices-section .markov-table-container {
    margin: 0;
    width: 100%;
    max-width: 100%;
    display: block;
    overflow-x: auto;
    box-sizing: border-box;
  }

  /* Tables should expand to fit content but not exceed container */
  .markov-matrices-section .emission-matrix-table,
  .markov-matrices-section .transition-matrix-table {
    width: auto; /* Let table size itself based on content */
    min-width: 100%; /* Ensure minimum full width usage */
    max-width: 100%;
    margin: 0 auto;
    table-layout: auto;
  }

  /* Ensure table headers get adequate space */
  .emission-matrix-table th,
  .transition-matrix-table th {
    min-width: 80px; /* Increased from 60px */
    max-width: 120px; /* Set a reasonable maximum */
    padding: 8px 10px; /* Increased horizontal padding */
    font-size: 0.85rem; /* Slightly smaller font to fit more content */
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  /* First column (POS tags) gets fixed width */
  .emission-matrix-table th:first-child,
  .transition-matrix-table th:first-child,
  .emission-matrix-table td:first-child,
  .transition-matrix-table td:first-child {
    min-width: 100px; /* Increased from 80px */
    width: 100px;
    max-width: 100px;
  }

  /* Table cells get better spacing */
  .emission-matrix-table td,
  .transition-matrix-table td {
    min-width: 80px; /* Increased from 60px */
    max-width: 120px;
    padding: 6px 8px; /* Increased horizontal padding */
  }

  /* Input fields get more space */
  .emission-matrix-table input,
  .transition-matrix-table input {
    max-width: 80px; /* Increased from 60px */
    min-width: 60px;
    padding: 6px 4px; /* Better padding */
  }

  /* Rest of existing desktop styles... */
  #instructions-bar {
    margin: 1.5rem 0;
    padding: 1rem 2rem;
  }

  #instructions-content {
    margin: 0 0 2rem 0;
    padding: 1.5rem 2rem;
  }

  .markov-matrices-section .markov-controls {
    align-self: center;
    width: fit-content;
    justify-content: center;
    margin-top: 1rem;
  }

  /* Desktop-only: matrix containers in main simulation section */
  .markov-matrices-section .emission-matrix-container,
  .markov-matrices-section .transition-matrix-container {
    width: 100%;
    max-width: 100%;
    margin: 1rem 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    box-sizing: border-box;
  }

  /* Desktop-only: section titles inside matrix containers in main simulation section */
  .markov-matrices-section .emission-matrix-container .markov-section-title,
  .markov-matrices-section .transition-matrix-container .markov-section-title {
    text-align: center;
    width: 100%;
    margin-bottom: 1rem;
  }

  /* Desktop-only: tables inside matrix containers in main simulation section */
  .markov-matrices-section .emission-matrix-table,
  .markov-matrices-section .transition-matrix-table {
    width: 100% !important;
    max-width: 100%;
    margin: 0 auto;
    table-layout: auto; /* Changed from fixed to auto */
  }

  /* Desktop-only: table containers inside matrix containers in main simulation section */
  .markov-matrices-section .markov-table-container {
    margin: 0;
    width: 100%;
    max-width: 100%;
    display: block;
    overflow-x: auto;
    box-sizing: border-box;
  }
}

/* TABLET RESPONSIVE DESIGN (≤900px) */
@media (max-width: 900px) {
  .container {
    width: 100vw;
    padding: 0;
  }

  .main-content {
    width: 100%;
    max-width: none;
    padding: 0 0.5rem;
    margin: 0;
  }

  #instructions-bar {
    width: 100%;
    margin: 0.5rem 0;
    padding: 0.8rem 1rem;
  }

  #instructions-content {
    width: 100%;
    margin: 0 0 1rem 0;
    padding: 1rem;
  }

  .instructions-label {
    font-size: 1.1em;
  }

  .arrow-icon {
    font-size: 1.1em;
  }

  /* Single column layout - override desktop styles */
  #main-2pane-container {
    flex-direction: column !important;
    gap: 1rem !important;
    padding: 0 0.5rem !important;
    width: 100% !important;
    max-width: none !important;
    margin: 0 !important;
    justify-content: flex-start !important;
    align-items: stretch !important;
  }

  #left-pane {
    flex: none !important;
    width: 100% !important;
    max-width: none !important;
    min-width: 0 !important;
    margin: 0 !important;
    order: 1;
  }

  #right-pane {
    flex: none !important;
    width: 100% !important;
    max-width: none !important;
    margin: 0 !important;
    order: 2;
    overflow-x: auto !important;
  }

  /* Adjust section padding */
  #corpus-selection,
  #corpus-info {
    padding: 0.8rem;
    margin-bottom: 1rem;
  }

  .markov-matrices-section {
    padding: 0.8rem !important;
    width: 100% !important;
    max-width: none !important;
    margin: 0 !important;
  }

  .markov-feedback-section,
  .markov-answers-section {
    padding: 0.8rem;
    width: 100% !important;
    max-width: none !important;
  }

  /* Matrix containers need full width and proper overflow */
  .emission-matrix-container,
  .transition-matrix-container {
    width: 100% !important;
    max-width: none !important;
    overflow-x: auto !important;
    display: block !important;
    margin: 0.5rem 0 !important;
  }

  /* Table containers need full width */
  .markov-table-container {
    position: relative;
    overflow-x: auto;
    width: 100% !important;
    max-width: none !important;
    display: block !important;
    margin: 0 !important;
  }

  /* Tables need proper mobile sizing */
  .markov-table,
  .emission-matrix-table,
  .transition-matrix-table {
    width: 100% !important;
    min-width: 600px;
    max-width: none !important;
    table-layout: auto !important;
  }

  /* Scroll indicator */
  .markov-table-container::after {
    content: "← Scroll horizontally to see more →";
    position: absolute;
    bottom: -25px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.75rem;
    color: var(--color-neutral-500);
    opacity: 0.8;
    white-space: nowrap;
    background: rgba(255, 255, 255, 0.9);
    padding: 2px 8px;
    border-radius: 4px;
  }

  /* Mobile-specific table styling */
  .emission-matrix-table th,
  .transition-matrix-table th {
    padding: 8px 6px;
    font-size: 0.85rem;
    min-width: 70px;
  }

  .emission-matrix-table th:first-child,
  .transition-matrix-table th:first-child {
    font-size: 0.9rem;
    padding-left: 10px;
    min-width: 80px;
    position: sticky;
    left: 0;
    z-index: 10;
  }

  .emission-matrix-table td,
  .transition-matrix-table td {
    padding: 6px 4px;
    min-width: 70px;
  }

  .emission-matrix-table td:first-child,
  .transition-matrix-table td:first-child {
    padding-left: 10px;
    position: sticky;
    left: 0;
    z-index: 5;
    background: var(--color-neutral-100) !important;
  }

  .emission-matrix-table input,
  .transition-matrix-table input {
    padding: 4px 3px;
    font-size: 0.85rem;
    min-height: 30px;
    max-width: 65px;
  }

  /* Touch-friendly buttons */
  .markov-controls {
    margin-top: 1rem;
    padding: 0 0.5rem;
  }

  .markov-controls button,
  button {
    min-height: 48px;
    padding: 0.8rem 1.2rem;
    font-size: 1rem;
    margin: 0.2rem;
  }

  /* Responsive form elements */
  select,
  .markov-dropdown {
    font-size: 16px;
    padding: 0.8rem 1rem;
    padding-right: 2.5rem;
  }

  .markov-table input[type="text"],
  .emission-matrix-table input[type="text"],
  .transition-matrix-table input[type="text"] {
    font-size: 16px;
    padding: 0.6rem 0.3rem;
  }

  /* Modal adjustments */
  .pos-modal-content {
    width: 95%;
    margin: 5vh auto;
  }

  .pos-modal-body {
    max-height: 80vh;
  }

  .pos-detail-item {
    flex-direction: column;
    gap: 0.5rem;
  }

  .pos-detail-tag {
    align-self: flex-start;
    min-width: auto;
  }
}

/* MOBILE RESPONSIVE DESIGN (≤600px) */
@media (max-width: 600px) {
  .container {
    width: 100vw;
    padding: 0;
  }

  .main-content {
    width: 100%;
    max-width: none;
    padding: 0 0.25rem;
    margin: 0;
  }

  #instructions-bar {
    width: 100%;
    padding: 0.6rem 0.8rem;
    margin: 0.5rem 0;
  }

  #instructions-content {
    width: 100%;
    padding: 0.8rem;
    margin: 0 0 0.8rem 0;
  }

  .instructions-label {
    font-size: 1rem;
  }

  .arrow-icon {
    font-size: 1rem;
  }

  #instructions-content ol {
    padding-left: 1rem;
  }

  #instructions-content li {
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
  }

  /* Very compact layout */
  #main-2pane-container {
    gap: 0.8rem !important;
    padding: 0 0.25rem !important;
    width: 100% !important;
    margin: 0 !important;
  }

  /* Compact sections */
  #corpus-selection,
  #corpus-info,
  .markov-matrices-section,
  .markov-feedback-section,
  .markov-answers-section {
    padding: 0.6rem;
    width: 100% !important;
    max-width: none !important;
    margin: 0 0 0.8rem 0 !important;
  }

  .markov-section-title {
    font-size: 1.1rem;
    margin-bottom: 0.6rem;
  }

  /* Table adjustments for small mobile */
  .emission-matrix-table,
  .transition-matrix-table {
    font-size: 0.8rem;
    min-width: 500px;
  }

  .markov-table th,
  .emission-matrix-table th,
  .transition-matrix-table th {
    padding: 6px 4px;
    font-size: 0.75rem;
    min-width: 60px;
  }

  .markov-table td,
  .emission-matrix-table td,
  .transition-matrix-table td {
    padding: 4px 3px;
    min-width: 60px;
  }

  .markov-table input[type="text"],
  .emission-matrix-table input[type="text"],
  .transition-matrix-table input[type="text"] {
    max-width: 55px;
    font-size: 14px;
    padding: 0.3rem 0.2rem;
  }

  /* Button layout for small screens */
  .markov-controls {
    flex-direction: column;
    gap: 0.4rem;
    margin-top: 0.8rem;
    padding: 0;
  }

  .markov-controls button,
  button {
    width: 100%;
    min-height: 44px;
    font-size: 0.9rem;
    padding: 0.6rem 1rem;
    margin: 0;
  }

  /* Compact form elements */
  select,
  .markov-dropdown {
    font-size: 16px;
    padding: 0.6rem 0.8rem;
    padding-right: 2rem;
  }
}

/* SMALL MOBILE RESPONSIVE DESIGN (≤480px) */
@media (max-width: 480px) {
  .container {
    width: 100vw;
    padding: 0;
  }

  .main-content {
    width: 100%;
    max-width: none;
    padding: 0 0.1rem;
    margin: 0;
  }

  #instructions-bar {
    width: 100%;
    padding: 0.5rem 0.6rem;
    margin: 0.3rem 0;
    border-radius: 0.4rem;
  }

  .instructions-label {
    font-size: 0.9rem;
  }

  .arrow-icon {
    font-size: 0.9rem;
  }

  #instructions-content {
    width: 100%;
    padding: 0.6rem;
    margin: 0 0 0.6rem 0;
    border-radius: 0 0 0.4rem 0.4rem;
  }

  #instructions-content li {
    font-size: 0.8rem;
  }

  /* Ultra compact layout */
  #main-2pane-container {
    gap: 0.6rem !important;
    padding: 0 0.1rem !important;
    width: 100% !important;
    margin: 0 !important;
  }

  /* Ultra compact sections */
  #corpus-selection,
  #corpus-info,
  .markov-matrices-section,
  .markov-feedback-section,
  .markov-answers-section {
    padding: 0.5rem;
    width: 100% !important;
    max-width: none !important;
    margin: 0 0 0.6rem 0 !important;
  }

  .markov-section-title {
    font-size: 1rem;
    margin-bottom: 0.5rem;
  }

  /* Ultra compact tables */
  .emission-matrix-table,
  .transition-matrix-table {
    font-size: 0.7rem;
    min-width: 400px;
  }

  .markov-table th,
  .emission-matrix-table th,
  .transition-matrix-table th {
    padding: 4px 2px;
    font-size: 0.65rem;
    min-width: 50px;
  }

  .markov-table td,
  .emission-matrix-table td,
  .transition-matrix-table td {
    padding: 3px 2px;
    min-width: 50px;
  }

  .markov-table input[type="text"],
  .emission-matrix-table input[type="text"],
  .transition-matrix-table input[type="text"] {
    max-width: 45px;
    font-size: 13px;
    padding: 0.2rem 0.1rem;
  }

  /* Button pairs for ultra small screens */
  .markov-controls {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.3rem;
    margin-top: 0.6rem;
  }

  .markov-controls button,
  button {
    flex: 1 1 calc(50% - 0.15rem);
    min-width: 0;
    font-size: 0.8rem;
    padding: 0.5rem 0.3rem;
    min-height: 40px;
  }

  /* Ultra compact form elements */
  select,
  .markov-dropdown {
    font-size: 14px;
    padding: 0.5rem 0.6rem;
    padding-right: 1.8rem;
  }
}

/* LANDSCAPE ORIENTATION ADJUSTMENTS */
@media (max-width: 768px) and (orientation: landscape) {
  #main-2pane-container {
    flex-direction: row;
    gap: 1.5rem;
  }

  #left-pane {
    flex: 0 0 35%;
    max-width: 300px;
  }

  #right-pane {
    flex: 1;
  }

  .markov-controls {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .markov-controls button {
    flex: 1 1 calc(50% - 0.25rem);
    min-width: 100px;
  }
}