/* ============================================
 * Crib Drag Calculator - Custom CSS
 * Minimal KISS design with dark mode support
 * ============================================ */

:root {
  /* Primary Colors */
  --color-primary: #666;
  --color-primary-dark: #555;
  --color-primary-light: #777;

  /* Neutral Colors */
  --color-text: #333;
  --color-text-muted: #666;
  --color-text-light: #999;
  --color-bg: #fff;
  --color-bg-secondary: #f5f5f5;
  --color-border: #e1e1e8;

  /* Form Controls */
  --color-input-bg: #fff;
  --color-input-border: #ccc;
  --color-input-placeholder: #999;

  /* Links and Buttons */
  --color-link: #666;
  --color-link-hover: #555;
  --color-btn-bg: #f5f5f5;
  --color-btn-hover: #e5e5e5;
  --color-btn-border: #e1e1e8;

  /* Table Colors */
  --color-table-header: #f5f5f5;
  --color-table-hover: #f5f5f5;
  --color-table-border: #e1e1e8;

  /* Transitions */
  --transition-fast: 0.1s;
  --transition-normal: 0.2s;
  --transition-theme: 0.3s;

  /* Spacing */
  --spacing-xs: 5px;
  --spacing-sm: 10px;
  --spacing-md: 15px;
  --spacing-lg: 20px;
  --spacing-xl: 30px;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;

  /* Font Sizes */
  --font-xs: 13px;
  --font-sm: 14px;
  --font-md: 15px;
  --font-lg: 16px;
  --font-xl: 18px;
  --font-xxl: 24px;

  /* Max Widths */
  --max-width: 1000px;
}

/* Dark Mode Variables - with smooth transition */
body.dark-mode {
  --color-primary: #999;
  --color-primary-dark: #888;
  --color-primary-light: #aaa;

  --color-text: #e0e0e0;
  --color-text-muted: #999;
  --color-text-light: #666;
  --color-bg: #1a1a1a;
  --color-bg-secondary: #2d2d2d;
  --color-border: #333;

  --color-input-bg: #2d2d2d;
  --color-input-border: #444;
  --color-input-placeholder: #666;

  --color-link: #999;
  --color-link-hover: #aaa;
  --color-btn-bg: #2d2d2d;
  --color-btn-hover: #3d3d3d;
  --color-btn-border: #444;

  --color-table-header: #2d2d2d;
  --color-table-hover: #2d2d2d;
  --color-table-border: #333;

  /* Apply smooth transition to all color changes across the site */
  transition:
    background-color var(--transition-theme) ease,
    color var(--transition-theme) ease,
    border-color var(--transition-theme) ease,
    background var(--transition-theme) ease;
}

* {
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  line-height: 1.5;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 20px;
  color: var(--color-text);
  background: var(--color-bg);
}

/* Dark mode specific overrides */
body.dark-mode textarea {
  background: var(--color-input-bg);
  border-color: var(--color-input-border);
  color: var(--color-text);
}

body.dark-mode textarea[disabled] {
  background: #252525;
}

body.dark-mode .footer {
  border-top-color: var(--color-border);
}

body.dark-mode hr {
  border-top-color: var(--color-border);
}

body.dark-mode h2 {
  color: #999;
}

/* Hidden utility class */
.hidden {
  display: none;
}

/* Smooth result list item appearance */
#results li {
  animation: slideIn 0.3s ease ease-out;
}

#results li.result-item {
  transition:
    background-color 0.2s ease,
    border-color 0.2s ease;
}

/* Fade in animation for results */
@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Link styling */
a {
  color: var(--color-link);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* Header with titles and dark mode toggle */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 10px;
}

.titles {
  flex: 1;
  margin: 0;
}

.titles h1 {
  margin-bottom: 5px;
  margin-top: 0;
}

.titles h2 {
  margin-top: 0;
  margin-bottom: 15px;
  font-size: 1.25rem;
  font-weight: normal;
  color: var(--color-primary);
}

/* Dark mode toggle button */
.btn-theme {
  background: var(--color-btn-bg);
  border: 1px solid var(--color-btn-border);
  border-radius: 50%;
  width: 48px;
  height: 48px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  padding: 0;
  transition: background-color var(--transition-normal) ease, transform var(--transition-fast) ease;
}

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

.btn-theme:active {
  transform: scale(0.95);
}

.btn-theme .icon {
  width: 24px;
  height: 24px;
  display: block;
}

body.dark-mode .btn-theme .icon {
  filter: invert(1);
}

hr {
  border: 0;
  border-top: 1px solid var(--color-border);
  margin: 15px 0;
}

/* Form Controls */
textarea, input, select {
  font-family: inherit;
}

textarea.form-control, input.form-control, select.form-control {
  width: 100%;
  padding: 10px;
  font-size: var(--font-lg);
  border: 1px solid var(--color-input-border);
  border-radius: var(--radius-sm);
  background: var(--color-input-bg);
  color: var(--color-text);
  transition:
    background-color var(--transition-normal) ease,
    border-color var(--transition-normal) ease,
    color var(--transition-normal) ease;
}

textarea.form-control {
  resize: vertical;
  line-height: 1.4;
  min-height: 120px;
}

/* Output textareas - readonly background */
#output_1, #output_2,
textarea.form-control[readonly], textarea[readonly] {
  background: var(--color-btn-bg);
  color: var(--color-text);
  cursor: not-allowed;
  border: none;
}

textarea[disabled], input[disabled] {
  background-color: var(--color-bg-secondary);
  cursor: default;
}

.form-group {
  margin-bottom: var(--spacing-md);
}

.form-group label {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: var(--spacing-xs);
  font-weight: 500;
}

.form-group textarea, .form-group input[type="text"] {
  width: 100%;
}

.inline-select select {
  padding: 4px 8px;
  font-size: var(--font-sm);
  border: 1px solid var(--color-input-border);
  border-radius: var(--radius-sm);
  background: var(--color-input-bg);
  color: var(--color-text);
  cursor: pointer;
  margin-left: auto;
}

.inline-select select:focus {
  outline: none;
  border-color: var(--color-primary);
}

/* Form check inline */
.form-check-inline {
  display: inline-flex;
  align-items: center;
  margin-right: var(--spacing-sm);
  margin-bottom: var(--spacing-xs);
}

.form-check-inline input[type="radio"],
.form-check-inline input[type="checkbox"] {
  margin: 0 var(--spacing-xs) 0 0;
}

.form-check-inline label {
  margin: 0;
  font-weight: normal;
  cursor: pointer;
}

/* Container and Row utilities */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
}

.row {
  display: flex;
  flex-wrap: wrap;
  margin: 0 calc(-1 * var(--spacing-sm));
  align-items: flex-start;
}

/* Default col takes full width */
.col {
  flex: 1 1 100%;
  padding: 0 var(--spacing-sm);
  min-width: 300px;
}

/* Two-column layout: each column takes 50% */
.col-md-6 {
  flex: 1 1 50%;
  padding: 0 var(--spacing-sm);
  min-width: 300px;
}

/* Legacy alias for two-column layout */
.col-half {
  flex: 1 1 50%;
  padding: 0 var(--spacing-sm);
  min-width: 300px;
}

/* Success/Danger styling */
.text-success {
  color: #28a745;
}

.text-danger {
  color: #dc3545;
}

.border-success {
  border-color: #28a745 !important;
}

.border-danger {
  border-color: #dc3545 !important;
}

/* Expandable section (tutorial, etc.) */
.expandable-section {
  margin: var(--spacing-md) 0;
}

.expandable-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 12px 16px;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: var(--font-sm);
  font-weight: 500;
  color: var(--color-text);
  transition: background-color var(--transition-normal) ease;
  user-select: none;
}

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

.expandable-header .expandable-icon {
  font-weight: bold;
  font-size: var(--font-xl);
  line-height: 1;
  transition: transform var(--transition-theme) ease;
}

.expandable-section[aria-expanded="true"] .expandable-header .expandable-icon {
  transform: rotate(45deg);
}

/* Expandable content with fade transition */
.expandable-content {
  padding: var(--spacing-md);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-top: none;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  transition:
    opacity var(--transition-theme) ease,
    max-height var(--transition-theme) ease,
    padding var(--transition-theme) ease,
    margin-top var(--transition-theme) ease;
  opacity: 1;
  max-height: none;
  overflow: visible;
}

.expandable-content.hidden {
  opacity: 0;
  max-height: 0;
  padding-top: 0;
  padding-bottom: 0;
  margin-top: 0;
  overflow: hidden;
}

/* Tutorial grid layout */
.tutorial-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-md);
}

.tutorial-item {
  display: flex;
  flex-direction: column;
}

.tutorial-item.full-width {
  grid-column: 1 / -1;
}

.tutorial-item label {
  font-weight: 500;
  margin-bottom: var(--spacing-xs);
  color: var(--color-text);
}

.tutorial-item textarea,
.tutorial-item textarea[disabled] {
  font-family: monospace;
  font-size: var(--font-sm);
  min-height: 80px;
  resize: vertical;
}

/* Result item styling */
.result-item {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--color-border);
}

.result-item:last-child {
  border-bottom: none;
}

.result-item.matching {
  background: var(--color-bg-secondary);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  margin: 4px 0;
}

.result-text {
  color: #28a745;
  font-weight: 500;
  word-break: break-all;
}

.result-spacer {
  flex: 1;
  min-width: 30px;
}

.btn-accept {
  background: var(--color-btn-bg);
  border: 1px solid var(--color-btn-border);
  border-radius: var(--radius-sm);
  padding: 6px 12px;
  cursor: pointer;
  font-size: var(--font-sm);
  transition: background-color var(--transition-normal) ease;
}

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

/* Results list styling */
#results {
  list-style: none;
  padding: 0;
  margin: 0;
}

#results li {
  padding: 8px 0;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
}

#results li:last-child {
  border-bottom: none;
}

#results a {
  color: var(--color-link);
  text-decoration: none;
  margin-right: var(--spacing-sm);
}

#results a:hover {
  text-decoration: underline;
}

#results button {
  background: var(--color-btn-bg);
  border: 1px solid var(--color-btn-border);
  border-radius: var(--radius-sm);
  padding: 6px 12px;
  cursor: pointer;
  font-size: var(--font-sm);
  margin-right: var(--spacing-xs);
}

#results button:hover {
  background: var(--color-btn-hover);
}

/* Text input styling (for character set, crib word) */
input[type="text"].form-control {
  width: 100%;
  padding: 10px;
  font-size: var(--font-lg);
  border: 1px solid var(--color-input-border);
  border-radius: var(--radius-sm);
  background: var(--color-input-bg);
  color: var(--color-text);
}

/* Type selector styling */
select.form-control {
  padding: 8px 12px;
  font-size: var(--font-lg);
  border: 1px solid var(--color-input-border);
  border-radius: var(--radius-sm);
  background: var(--color-input-bg);
  color: var(--color-text);
  cursor: pointer;
}

/* Character set row - inline layout for desktop */
.char-set-row {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.char-set-row label {
  font-weight: 500;
  margin: 0;
  white-space: nowrap;
}

.char-set-controls {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  flex: 1;
  min-width: 200px;
}

.char-set-controls .inline-select {
  flex-shrink: 0;
}

.char-set-controls .inline-select select {
  padding: 6px 10px;
  font-size: var(--font-sm);
}

.char-set-controls input[type="text"] {
  flex: 1;
  padding: 8px 10px;
  font-size: var(--font-lg);
  border: 1px solid var(--color-input-border);
  border-radius: var(--radius-sm);
  background: var(--color-input-bg);
  color: var(--color-text);
}

/* Mobile: stack vertically */
@media (max-width: 600px) {
  .char-set-row {
    flex-direction: column;
    align-items: stretch;
  }

  .char-set-row label {
    margin-bottom: var(--spacing-xs);
  }

  .char-set-controls {
    flex-direction: column;
  }

  .char-set-controls .inline-select {
    width: 100%;
  }

  .char-set-controls .inline-select select {
    width: 100%;
  }

  .char-set-controls input[type="text"] {
    width: 100%;
  }
}

/* Footer - 3 column responsive layout */
.footer {
  margin-top: 40px;
  padding: 30px 0;
  border-top: 1px solid var(--color-border);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  margin-bottom: 20px;
}

.footer-col h4 {
  font-size: var(--font-sm);
  font-weight: 600;
  margin: 0 0 12px 0;
  color: var(--color-text);
}

.footer-col p {
  font-size: var(--font-sm);
  color: var(--color-text-muted);
  margin: 0;
  line-height: 1.6;
}

.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-col ul li {
  margin-bottom: 6px;
}

.footer-col ul li a {
  color: var(--color-link);
  text-decoration: none;
  font-size: var(--font-sm);
  background-color: var(--color-btn-bg);
  padding: 4px 10px;
  border-radius: 16px;
  transition: background-color var(--transition-normal) ease;
  display: inline-block;
}

.footer-col ul li a:hover {
  text-decoration: none;
  background-color: var(--color-btn-hover);
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-top: 20px;
  text-align: center;
}

.footer-bottom p {
  margin: 0;
  font-size: var(--font-xs);
  color: var(--color-text-muted);
}

.footer-bottom a {
  color: var(--color-link);
  font-weight: 500;
  text-decoration: none;
}

.footer-bottom a:hover {
  text-decoration: underline;
}

/* Mobile responsive */
@media (max-width: 768px) {
  body {
    padding: 15px;
  }

  .row {
    flex-direction: column;
  }

  .col, .col-md-6, .col-half {
    min-width: 100%;
    margin-bottom: 20px;
  }

  h1 {
    font-size: 1.5rem;
  }

  h2 {
    font-size: 1.2rem;
  }

  textarea {
    font-size: 16px;
  }

  /* Footer becomes single column on mobile */
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .footer-col ul li a,
  .footer-col p {
    display: block;
  }
}