:root {
  --primary-color: #2563eb;
  --primary-hover: #1d4ed8;
  --danger-color: #ef4444;
  --danger-hover: #dc2626;
  --secondary-color: #6b7280;
  --secondary-hover: #4b5563;
  --bg-color: #fafafa;
  --card-bg: #ffffff;
  --border-color: #e5e7eb;
  --text-primary: #0f172a;
  --text-secondary: #64748b;
  --success-color: #10b981;
  --accent-color: #8b5cf6;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background: linear-gradient(to bottom, #fafafa 0%, #f4f4f5 100%);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 3rem 0 4rem;
  margin-bottom: 2rem;
}

.hero-content {
  max-width: 700px;
  margin: 0 auto;
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.hero-icon {
  display: inline-block;
  font-size: clamp(2rem, 4vw, 3rem);
  margin-right: 0.5rem;
}

.hero-subtitle {
  font-size: clamp(1.1rem, 2vw, 1.3rem);
  color: var(--text-secondary);
  margin-bottom: 2rem;
  font-weight: 400;
}

.hero-features {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.feature-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1rem;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  font-size: 0.875rem;
  color: var(--text-secondary);
  font-weight: 500;
  box-shadow: var(--shadow-sm);
}

/* Card Styles */
.card {
  background: var(--card-bg);
  border-radius: 16px;
  padding: 2.5rem;
  margin-bottom: 2.5rem;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s;
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card-header {
  margin-bottom: 2rem;
}

.card-header h2 {
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.card-description {
  color: var(--text-secondary);
  font-size: 1rem;
}

/* Form Styles */
.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
  font-weight: 500;
  color: var(--text-primary);
  font-size: 0.95rem;
}

.label-help {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 400;
}

.form-group input[type="text"],
.form-group input[type="number"] {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 1.5px solid var(--border-color);
  border-radius: 10px;
  font-size: 1rem;
  transition: all 0.2s;
  background: var(--bg-color);
}

.form-group input:focus {
  outline: none;
  border-color: var(--primary-color);
  background: var(--card-bg);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.help-text {
  display: block;
  margin-top: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* Scale Inputs */
.scale-inputs {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.scale-input-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.scale-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  font-weight: 600;
}

.scale-input-group input {
  width: 80px;
  text-align: center;
  font-size: 1.125rem;
  font-weight: 600;
}

.scale-divider {
  color: var(--text-secondary);
  padding-top: 1.5rem;
  font-weight: 500;
}

/* Buttons */
.btn-primary,
.btn-secondary,
.btn-danger,
.btn-back {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.btn-large {
  padding: 1rem 2rem;
  font-size: 1.125rem;
  width: 100%;
  margin-top: 0.5rem;
}

.btn-icon {
  font-size: 1.25rem;
  line-height: 1;
}

.btn-primary {
  background-color: var(--primary-color);
  color: white;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background-color: var(--card-bg);
  color: var(--text-primary);
  border: 1.5px solid var(--border-color);
}

.btn-secondary:hover {
  background-color: var(--bg-color);
  border-color: var(--text-secondary);
}

.btn-danger {
  background-color: var(--danger-color);
  color: white;
}

.btn-danger:hover {
  background-color: var(--danger-hover);
}

.btn-back {
  background-color: var(--bg-color);
  color: var(--text-primary);
}

/* Recent Matrices */
.recent-list {
  display: grid;
  gap: 1rem;
}

.recent-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  transition: border-color 0.2s;
}

.recent-item:hover {
  border-color: var(--primary-color);
}

.recent-item-info h3 {
  margin-bottom: 0.25rem;
  font-size: 1.1rem;
}

.recent-item-meta {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.recent-item a {
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
}

.empty-state {
  color: var(--text-secondary);
  text-align: center;
  padding: 2rem;
}

/* Editor Styles */
.editor-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.header-left, .header-right {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Save Status Indicator */
.save-status {
  font-size: 0.9rem;
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
  font-weight: 500;
  transition: all 0.3s;
}

.save-status.unsaved {
  color: #f59e0b;
  background-color: #fef3c7;
}

.save-status.saved {
  color: var(--success-color);
  background-color: #d1fae5;
}

/* Auto-save toggle button */
.btn-small {
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
}

#autoSaveToggle {
  cursor: pointer;
  transition: all 0.2s;
}

.auto-save-on {
  color: var(--success-color);
  font-weight: 600;
}

.auto-save-off {
  color: var(--text-secondary);
  font-weight: 500;
}

/* Save button with unsaved changes */
.btn-primary.has-changes {
  animation: pulse 2s infinite;
  box-shadow: 0 0 0 0 rgba(59, 130, 246, 0.7);
}

@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(59, 130, 246, 0.7);
  }
  70% {
    box-shadow: 0 0 0 10px rgba(59, 130, 246, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(59, 130, 246, 0);
  }
}

.editable-title {
  border: 2px dashed transparent;
  padding: 0.25rem 0.5rem;
  border-radius: 6px;
  transition: all 0.2s;
  font-size: 1.8rem;
  min-width: 200px;
}

.editable-title:hover {
  border-color: var(--border-color);
}

.editable-title:focus {
  outline: none;
  border-color: var(--primary-color);
  background-color: var(--bg-color);
}

/* Toolbar */
.editor-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  background: var(--card-bg);
  border-radius: 12px;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.toolbar-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.toolbar-group label {
  font-weight: 500;
}

.toolbar-group input {
  width: 80px;
  padding: 0.5rem;
  border: 1px solid var(--border-color);
  border-radius: 6px;
}

.status {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
}

.status.success {
  color: var(--success-color);
}

.status.error {
  color: var(--danger-color);
}

.status.info {
  color: var(--primary-color);
}

/* Matrix Table */
.editor-main {
  background: var(--card-bg);
  padding: 2rem;
  border-radius: 12px;
  margin-bottom: 1.5rem;
  overflow-x: auto;
}

.matrix-container {
  min-width: 100%;
  overflow-x: auto;
}

.matrix-table {
  border-collapse: collapse;
  width: 100%;
  min-width: 500px;
}

.matrix-table td {
  border: 2px solid var(--border-color);
  padding: 0;
  min-width: 100px;
  min-height: 60px;
}

.matrix-table input {
  width: 100%;
  height: 100%;
  padding: 0.75rem;
  border: none;
  background: transparent;
  font-size: 0.95rem;
  font-family: inherit;
  min-height: 60px;
}

.matrix-table input:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: -2px;
  background-color: var(--bg-color);
}

/* Modal */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal-content {
  background: var(--card-bg);
  padding: 2rem;
  border-radius: 12px;
  max-width: 500px;
  width: 90%;
}

.modal-content h2 {
  margin-bottom: 1rem;
}

.modal-content p {
  margin-bottom: 1.5rem;
  color: var(--text-secondary);
}

.modal-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.conflict-details {
  background: var(--bg-color);
  padding: 1rem;
  border-radius: 6px;
  margin: 1rem 0;
  max-height: 200px;
  overflow-y: auto;
}

.conflict-item {
  padding: 0.5rem;
  margin-bottom: 0.5rem;
  border-left: 3px solid var(--primary-color);
  background: var(--card-bg);
}

.conflict-item.modified {
  border-left-color: #f59e0b;
}

.conflict-item.added {
  border-left-color: var(--success-color);
}

.conflict-item.deleted {
  border-left-color: var(--danger-color);
}

/* Editor Toolbar */
.editor-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
  margin-bottom: 1rem;
}

.toolbar-group {
  display: flex;
  gap: 0.75rem;
}

.toolbar-info {
  display: flex;
  gap: 1rem;
  align-items: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.scale-info {
  font-weight: 500;
}

.status {
  padding: 0.25rem 0.75rem;
  border-radius: 4px;
  font-size: 0.85rem;
}

.status.success {
  background: #d1fae5;
  color: var(--success-color);
}

.status.error {
  background: #fee2e2;
  color: var(--danger-color);
}

/* Notes Section */
.notes-section {
  background: #fffbeb;
  border: 2px solid #fbbf24;
  border-radius: 8px;
  padding: 1.5rem;
  margin-top: 1.5rem;
}

.notes-section h3 {
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.notes-section textarea {
  width: 100%;
  min-height: 120px;
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-family: inherit;
  font-size: 0.95rem;
  resize: vertical;
  margin-bottom: 0.75rem;
}

.notes-section .url-input {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-family: inherit;
  font-size: 0.95rem;
  margin-bottom: 0.75rem;
}

.notes-section .url-input:focus {
  outline: none;
  border-color: var(--primary-color);
}

.notes-section textarea:focus {
  outline: none;
  border-color: var(--primary-color);
}

.notes-section button {
  margin-right: 0.5rem;
}

/* GUT Items Table */
.items-container {
  overflow-x: auto;
  margin-top: 1.5rem;
}

.items-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card-bg);
}

.items-table th {
  background: var(--bg-color);
  padding: 0.75rem;
  text-align: center;
  font-weight: 600;
  border: 1px solid var(--border-color);
  font-size: 0.85rem;
  white-space: nowrap;
}

.items-table .col-group-header {
  background: #dbeafe;
  font-size: 0.9rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--primary-color);
}

.items-table .col-group-header.avg-group {
  background: #fef3c7;
  color: #d97706;
}

.items-table td {
  padding: 0.5rem;
  border: 1px solid var(--border-color);
  text-align: center;
}

.items-table .col-label {
  text-align: left;
  min-width: 250px;
}

.items-table .col-g,
.items-table .col-u,
.items-table .col-t {
  width: 60px;
}

.items-table .col-score {
  width: 80px;
  font-weight: 600;
}

.items-table .col-count {
  width: 50px;
}

.items-table .col-actions {
  width: 100px;
  white-space: nowrap;
}

.items-table .avg-col {
  background: #fffbeb;
}

.items-table .avg-value {
  color: var(--text-secondary);
  font-style: italic;
}

.items-table input.item-input {
  width: 100%;
  padding: 0.5rem;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-size: 0.9rem;
  text-align: center;
}

.items-table input.input-label,
.items-table textarea.input-label {
  text-align: left;
}

.items-table textarea.input-label {
  width: 100%;
  min-height: 2.5rem;
  padding: 0.5rem;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-size: 0.9rem;
  resize: none;
  overflow-y: auto;
  line-height: 1.4;
  font-family: inherit;
  box-sizing: border-box;
}

.items-table input.item-input:focus,
.items-table textarea.item-input:focus {
  outline: 2px solid var(--primary-color);
  border-color: var(--primary-color);
}

.items-table .score-display {
  color: var(--primary-color);
  font-size: 1.1rem;
}

.items-table .has-notes {
  margin-left: 0.5rem;
  font-size: 0.9rem;
}

.items-table .has-url {
  margin-left: 0.5rem;
  font-size: 0.9rem;
  text-decoration: none;
  transition: opacity 0.2s;
}

.items-table .has-url:hover {
  opacity: 0.7;
}

.items-table .btn-icon {
  background: none;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  padding: 0.25rem 0.5rem;
  opacity: 0.7;
  transition: opacity 0.2s;
}

.items-table .btn-icon:hover {
  opacity: 1;
}

.items-table .empty-state-row td {
  padding: 3rem;
  text-align: center;
  color: var(--text-secondary);
  font-style: italic;
}

.gut-guide {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 1rem;
  background: #eff6ff;
  border-radius: 8px;
  margin-bottom: 1.5rem;
}

.guide-item {
  flex: 1;
  min-width: 150px;
  font-size: 0.9rem;
}

.guide-item strong {
  color: var(--primary-color);
}

/* Footer */
footer {
  text-align: center;
  padding: 2rem 0;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

footer a {
  color: var(--primary-color);
  text-decoration: none;
}

.info-text {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
  .container {
    padding: 1rem;
  }

  h1 {
    font-size: 2rem;
  }

  .editor-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .header-left, .header-right {
    width: 100%;
    justify-content: space-between;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .modal-actions {
    flex-direction: column;
  }

  .modal-actions button {
    width: 100%;
  }
}

/* Modern GUT Method Section */
.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-header h2 {
  font-size: 2rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.section-description {
  font-size: 1.1rem;
  color: var(--text-secondary);
}

.gut-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.gut-card {
  background: var(--card-bg);
  border: 1.5px solid var(--border-color);
  border-radius: 16px;
  padding: 2rem;
  transition: all 0.3s;
}

.gut-card:hover {
  border-color: var(--primary-color);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.gut-card-icon {
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  border-radius: 12px;
  margin-bottom: 1.5rem;
}

.gut-card-icon.gravity {
  background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
}

.gut-card-icon.urgency {
  background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
}

.gut-card-icon.tendency {
  background: linear-gradient(135deg, #ddd6fe 0%, #c4b5fd 100%);
}

.gut-card h3 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.gut-card-description {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  font-size: 1rem;
}

.gut-scale {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.scale-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem;
  background: var(--bg-color);
  border-radius: 8px;
  transition: background 0.2s;
}

.scale-item:hover {
  background: var(--border-color);
}

.scale-num {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--card-bg);
  border: 2px solid var(--border-color);
  border-radius: 50%;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--primary-color);
  flex-shrink: 0;
}

.scale-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 4rem 2rem;
}

.empty-state-icon {
  font-size: 4rem;
  margin-bottom: 1.5rem;
  opacity: 0.5;
}

.empty-state-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.empty-state-text {
  color: var(--text-secondary);
  font-size: 1rem;
}

/* Recent Lists */
.recent-list {
  display: grid;
  gap: 1rem;
}

.recent-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem;
  background: var(--bg-color);
  border: 1.5px solid var(--border-color);
  border-radius: 12px;
  transition: all 0.2s;
  cursor: pointer;
}

.recent-item:hover {
  border-color: var(--primary-color);
  background: var(--card-bg);
  box-shadow: var(--shadow-sm);
}

.recent-item-info {
  flex: 1;
}

.recent-item-title {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
  font-size: 1.05rem;
}

.recent-item-meta {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.recent-item-arrow {
  color: var(--text-secondary);
  font-size: 1.25rem;
  transition: transform 0.2s;
}

.recent-item:hover .recent-item-arrow {
  transform: translateX(4px);
  color: var(--primary-color);
}

/* Footer */
.footer {
  margin-top: 4rem;
  padding: 2rem 0;
  border-top: 1px solid var(--border-color);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-text {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer-text strong {
  color: var(--text-primary);
}

.footer-links {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--primary-color);
}

.footer-divider {
  color: var(--border-color);
}

/* Responsive adjustments for new design */
@media (max-width: 768px) {
  .hero {
    padding: 2rem 0 3rem;
  }
  
  .hero-title {
    font-size: 2rem;
  }
  
  .card {
    padding: 1.5rem;
  }
  
  .gut-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  
  .scale-inputs {
    flex-direction: column;
    align-items: stretch;
  }
  
  .scale-input-group input {
    width: 100%;
  }
  
  .scale-divider {
    padding-top: 0;
    text-align: center;
  }
  
  .footer-content {
    flex-direction: column;
    text-align: center;
  }
}