/* ==========================================================================
   TestDe6 - Modern Multilingual Online Testing Platform Styles
   ========================================================================== */

:root {
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  
  /* Light Theme */
  --bg-color: #f8fafc;
  --surface-color: #ffffff;
  --surface-alt: #f1f5f9;
  --surface-hover: #e2e8f0;
  --border-color: #e2e8f0;
  --border-focus: #059a6b;
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-inverse: #ffffff;
  
  --primary: #059a6b;
  --primary-hover: #047d57;
  --primary-light: #e8f7f2;
  
  --success: #10b981;
  --success-light: #ecfdf5;
  --warning: #f59e0b;
  --warning-light: #fffbeb;
  --danger: #ef4444;
  --danger-light: #fef2f2;
  
  --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 -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  
  --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1120px;
}

[data-theme="dark"] {
  --bg-color: #090d16;
  --surface-color: #111827;
  --surface-alt: #1e293b;
  --surface-hover: #334155;
  --border-color: #1e293b;
  --border-focus: #10b981;
  
  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --text-inverse: #0f172a;
  
  --primary: #10b981;
  --primary-hover: #34d399;
  --primary-light: rgba(5, 154, 107, 0.2);
  
  --success: #34d399;
  --success-light: rgba(52, 211, 153, 0.15);
  --warning: #fbbf24;
  --warning-light: rgba(251, 191, 36, 0.15);
  --danger: #f87171;
  --danger-light: rgba(248, 113, 113, 0.15);
  
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
}

/* Base Reset & Typography */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color 0.3s ease, color 0.3s ease;
}

[dir="rtl"] {
  direction: rtl;
  text-align: right;
}

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

a:hover {
  text-decoration: underline;
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

/* Layout */
.site-container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* Header */
.site-header {
  background-color: var(--surface-color);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(8px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

.brand-icon {
  width: 2.25rem;
  height: 2.25rem;
  background: linear-gradient(135deg, #059a6b, #10b981);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 800;
  font-size: 1.1rem;
  transition: transform 0.2s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.2s ease;
}

.brand:hover .brand-icon {
  transform: scale(1.06);
  box-shadow: 0 4px 12px rgba(5, 154, 107, 0.35);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Navigation Links */
.header-nav {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.nav-link {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.785rem;
  padding: 0.375rem 0.625rem;
  border-radius: var(--radius-sm);
}

.nav-link:hover, .nav-link.active {
  color: var(--primary);
  background-color: var(--surface-alt);
  text-decoration: none;
}

/* Language Selector: Icon Only with Hover Dropdown List */
.lang-select-wrapper {
  position: relative;
  display: inline-block;
}

.lang-icon-btn {
  background: var(--surface-alt);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  width: 2.25rem;
  height: 2.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-secondary);
  transition: var(--transition);
  padding: 0;
}

.lang-icon-btn:hover,
.lang-select-wrapper:hover .lang-icon-btn,
.lang-select-wrapper.is-open .lang-icon-btn {
  background-color: var(--surface-hover);
  color: var(--primary);
  border-color: var(--border-focus);
}

.lang-globe-icon {
  width: 1.25rem;
  height: 1.25rem;
  display: block;
}

/* Hover Dropdown Menu List */
.lang-dropdown-menu {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 0.5rem;
  width: 260px;
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  z-index: 1000;
  padding: 0.5rem 0;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(6px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
}

/* Invisible hover bridge to prevent closing when cursor moves toward dropdown */
.lang-dropdown-menu::before {
  content: "";
  position: absolute;
  top: -12px;
  left: 0;
  right: 0;
  height: 12px;
}

[dir="rtl"] .lang-dropdown-menu {
  right: auto;
  left: 0;
}

/* Display language list on mouse over (hover), focus-within, or active click */
.lang-select-wrapper:hover .lang-dropdown-menu,
.lang-select-wrapper:focus-within .lang-dropdown-menu,
.lang-select-wrapper.is-open .lang-dropdown-menu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
}

.lang-dropdown-header {
  padding: 0.35rem 1rem 0.5rem;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 0.25rem;
}

.lang-dropdown-list {
  max-height: 320px;
  overflow-y: auto;
  overscroll-behavior: contain;
}

.lang-dropdown-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  color: var(--text-primary);
  text-decoration: none !important;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.lang-dropdown-item:hover {
  background-color: var(--surface-alt);
  color: var(--primary);
}

.lang-dropdown-item.active {
  background-color: var(--primary-light);
  color: var(--primary);
  font-weight: 700;
}

.lang-item-native {
  font-weight: 500;
}

.lang-item-code {
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--text-muted);
  background-color: var(--surface-alt);
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
  margin-left: auto;
  margin-right: 0.5rem;
}

[dir="rtl"] .lang-item-code {
  margin-left: 0.5rem;
  margin-right: auto;
}

.lang-check {
  color: var(--primary);
  font-weight: 800;
}

.theme-toggle-btn {
  background: var(--surface-alt);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  width: 2.25rem;
  height: 2.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-secondary);
  transition: var(--transition);
}

.theme-toggle-btn:hover {
  background-color: var(--surface-hover);
  color: var(--text-primary);
}

/* Breadcrumb */
.breadcrumb-nav {
  padding: 1rem 0 0.5rem;
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  list-style: none;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.breadcrumb-item a {
  color: var(--text-muted);
  transition: color 0.15s ease;
}

.breadcrumb-item a:hover {
  color: var(--primary);
}

.breadcrumb-item.active a,
.breadcrumb-item a[aria-current="page"] {
  color: var(--text-primary);
  font-weight: 600;
}

.breadcrumb-item.active a:hover,
.breadcrumb-item a[aria-current="page"]:hover {
  color: var(--primary);
}

.breadcrumb-separator {
  user-select: none;
  color: var(--text-muted);
}

/* Page Intro & SEO Block */
.tool-hero {
  padding: 1.5rem 0 1.75rem;
  text-align: left;
}

[dir="rtl"] .tool-hero {
  text-align: right;
}

.tool-title {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
  line-height: 1.2;
}

.tool-intro {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 840px;
  line-height: 1.6;
}

.tool-intro strong {
  color: var(--text-primary);
  font-weight: 600;
}

.keyword-badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.keyword-badge {
  display: inline-flex;
  align-items: center;
  background-color: var(--surface-alt);
  border: 1px solid var(--border-color);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-secondary);
}

/* Settings / Options Area - Compact Small Style */
.settings-panel {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  margin-bottom: 1.25rem;
  box-shadow: var(--shadow-sm);
}

.settings-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.625rem;
  padding-bottom: 0.375rem;
  border-bottom: 1px solid var(--border-color);
}

.settings-title {
  font-size: 0.8125rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.375rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.setting-title-icon {
  width: 14px !important;
  height: 14px !important;
}

.settings-reset-btn {
  background: none;
  border: none;
  font-size: 0.75rem;
  color: var(--text-muted);
  cursor: pointer;
  text-decoration: underline;
}

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

.settings-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem 1rem;
}

@media (max-width: 960px) {
  .settings-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 520px) {
  .settings-grid {
    grid-template-columns: 1fr;
  }
}

.setting-item {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  gap: 0.25rem;
  min-width: 0;
}

.setting-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
  display: flex;
  justify-content: space-between;
  align-items: center;
  line-height: 1.3;
  min-height: 18px;
}

.setting-help {
  font-size: 0.6875rem;
  color: var(--text-muted);
  line-height: 1.25;
  display: block;
}

/* UI Form Controls - Compact Small Style */
.btn-group {
  display: flex;
  align-items: stretch;
  background-color: var(--surface-alt);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 2px;
  width: 100%;
  min-width: 0;
  min-height: 32px;
  box-sizing: border-box;
}

.btn-group-item {
  flex: 1 1 0;
  min-width: 0;
  padding: 0.25rem 0.25rem;
  background: transparent;
  border: none;
  border-radius: calc(var(--radius-sm) - 2px);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  text-align: center;
  transition: var(--transition);
  white-space: normal;
  word-break: normal;
  overflow-wrap: break-word;
  line-height: 1.15;
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-group-item:hover {
  color: var(--text-primary);
}

.btn-group-item.active {
  background-color: var(--surface-color);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.settings-panel .form-select,
.settings-panel .form-input,
.setting-item .form-select,
.setting-item .form-input {
  width: 100%;
  padding: 0.3rem 0.5rem !important;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background-color: var(--surface-alt);
  color: var(--text-primary);
  font-size: 0.8125rem !important;
  font-family: inherit;
  height: 32px !important;
  min-height: 32px !important;
  line-height: normal !important;
  cursor: pointer;
  transition: var(--transition);
  box-sizing: border-box;
}

.settings-panel .form-select:focus,
.settings-panel .form-input:focus,
.setting-item .form-select:focus,
.setting-item .form-input:focus {
  border-color: var(--border-focus);
  outline: none;
  box-shadow: 0 0 0 2px rgba(5, 154, 107, 0.15);
}

/* Switch Component - Compact Small Style */
.switch-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  cursor: pointer;
  user-select: none;
  min-height: 24px;
}

.switch {
  position: relative;
  display: inline-block;
  width: 32px;
  height: 18px;
  flex-shrink: 0;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--surface-hover);
  transition: 0.2s;
  border-radius: 18px;
  border: 1px solid var(--border-color);
}

.slider:before {
  position: absolute;
  content: "";
  height: 12px;
  width: 12px;
  left: 2px;
  bottom: 2px;
  background-color: white;
  transition: 0.2s;
  border-radius: 50%;
}

input:checked + .slider {
  background-color: var(--primary);
  border-color: var(--primary);
}

input:checked + .slider:before {
  transform: translateX(14px);
}

[dir="rtl"] input:checked + .slider:before {
  transform: translateX(-14px);
}

/* Range Input - Compact */
.range-slider-wrapper {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  height: 32px;
}

.range-slider {
  flex: 1;
  accent-color: var(--primary);
  cursor: pointer;
  height: 4px;
}

.range-value {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--primary);
  min-width: 1.75rem;
  text-align: right;
}

/* Interactive Test Card */
.test-card {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-md);
  position: relative;
}

/* Primary Action Buttons */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background-color: var(--primary);
  color: #ffffff;
  font-weight: 600;
  font-size: 1rem;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 2px 4px rgba(5, 154, 107, 0.2);
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(5, 154, 107, 0.3);
  text-decoration: none;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background-color: var(--surface-alt);
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.9375rem;
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  cursor: pointer;
  transition: var(--transition);
}

.btn-secondary:hover {
  background-color: var(--surface-hover);
  text-decoration: none;
}

.btn-sm {
  font-size: 0.8125rem;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-sm);
}

.btn-text-sm {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 500;
  cursor: pointer;
  padding: 0.2rem 0.4rem;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

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

/* Live Stats Bar */
.live-stats-bar {
  display: flex;
  align-items: center;
  justify-content: space-around;
  background-color: var(--surface-alt);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  margin-bottom: 1.5rem;
}

.stat-item {
  text-align: center;
}

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

.stat-value {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.1;
  font-family: var(--font-mono);
}

/* ==========================================================================
   Tool 1: Typing Speed Test Styles
   ========================================================================== */
.typing-box {
  background-color: var(--surface-alt);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  font-family: var(--font-mono);
  font-size: 1.25rem;
  line-height: 2.2;
  height: 160px;
  overflow: hidden;
  position: relative;
  user-select: none;
  cursor: text;
}

.typing-words {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding-top: 0.85rem;
}

.typing-word {
  display: inline-flex;
  position: relative;
  border-radius: 4px;
  padding: 0 3px;
  margin-top: 0.85rem;
}

.typing-word.active {
  background-color: var(--surface-hover);
  outline: 2px solid var(--primary-light);
}

.typing-word.active[data-reading]::after {
  content: attr(data-reading);
  position: absolute;
  top: -1.35rem;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.72rem;
  line-height: 1.1;
  font-weight: 600;
  color: var(--primary);
  background: var(--surface-color);
  border: 1px solid var(--primary);
  border-radius: 4px;
  padding: 1px 6px;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  white-space: nowrap;
  pointer-events: none;
  z-index: 10;
}

.typing-char {
  color: var(--text-muted);
  position: relative;
}

.typing-char.correct {
  color: var(--success);
}

.typing-char.incorrect {
  color: var(--danger);
  background-color: var(--danger-light);
  border-radius: 2px;
}

.typing-char.extra {
  color: var(--danger);
  text-decoration: line-through;
}

.typing-input-field {
  width: 100%;
  margin-top: 1rem;
  padding: 0.875rem 1.25rem;
  font-size: 1.125rem;
  font-family: var(--font-mono);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  background-color: var(--surface-color);
  color: var(--text-primary);
  outline: none;
  transition: var(--transition);
}

.typing-input-field:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(5, 154, 107, 0.2);
}

/* ==========================================================================
   Tool 2: Reading Speed Test Styles
   ========================================================================== */
.reading-text-container {
  margin: 1.5rem auto;
  padding: 1.75rem;
  background-color: var(--surface-alt);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  transition: max-width 0.2s ease, font-size 0.2s ease, line-height 0.2s ease;
}

.reading-passage {
  color: var(--text-primary);
}

.reading-passage p {
  margin-bottom: 1.25rem;
}

.reading-controls-bar {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-top: 1.5rem;
}

.quiz-container {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
}

.quiz-question {
  margin-bottom: 1.5rem;
  background: var(--surface-alt);
  padding: 1.25rem;
  border-radius: var(--radius-md);
}

.quiz-title {
  font-weight: 700;
  margin-bottom: 0.875rem;
  font-size: 1rem;
}

.quiz-option {
  display: block;
  padding: 0.625rem 1rem;
  margin-bottom: 0.5rem;
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  font-size: 0.9375rem;
}

.quiz-option:hover {
  border-color: var(--primary);
  background-color: var(--primary-light);
}

.quiz-option.selected {
  border-color: var(--primary);
  background-color: var(--primary-light);
  font-weight: 600;
}

.quiz-option.correct-answer {
  background-color: var(--success-light);
  border-color: var(--success);
  color: var(--success);
  font-weight: 600;
}

.quiz-option.wrong-answer {
  background-color: var(--danger-light);
  border-color: var(--danger);
  color: var(--danger);
}

/* ==========================================================================
   Tool 3: Reaction Time Test Styles
   ========================================================================== */
.reaction-arena {
  width: 100%;
  min-height: 320px;
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  user-select: none;
  transition: background-color 0.15s ease, transform 0.05s ease;
  text-align: center;
  padding: 2rem;
  position: relative;
}

.reaction-arena:active {
  transform: scale(0.995);
}

.reaction-arena.state-idle {
  background-color: #2563eb;
  color: #ffffff;
}

.reaction-arena.state-waiting {
  background-color: #dc2626;
  color: #ffffff;
}

.reaction-arena.state-ready {
  background-color: #16a34a;
  color: #ffffff;
}

.reaction-arena.state-early {
  background-color: #ea580c;
  color: #ffffff;
}

.reaction-arena.state-result {
  background-color: #0284c7;
  color: #ffffff;
}

.reaction-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.reaction-title {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
}

.reaction-subtitle {
  font-size: 1.125rem;
  opacity: 0.9;
}

.reaction-rounds-dots {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 1.5rem;
}

.round-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background-color: var(--surface-hover);
  transition: var(--transition);
}

.round-dot.completed {
  background-color: var(--success);
}

.round-dot.current {
  background-color: var(--primary);
  transform: scale(1.25);
}

/* ==========================================================================
   Tool 4: Memory Test Styles
   ========================================================================== */
.memory-status-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}

.memory-lives {
  display: flex;
  gap: 0.375rem;
  font-size: 1.25rem;
}

.memory-grid {
  display: grid;
  gap: 0.75rem;
  max-width: 400px;
  margin: 0 auto;
  aspect-ratio: 1;
}

.memory-tile {
  background-color: var(--surface-alt);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color 0.15s ease, transform 0.1s ease, box-shadow 0.15s ease;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 800;
  color: transparent;
  user-select: none;
}

.memory-tile:active {
  transform: scale(0.95);
}

.memory-tile.flashing {
  background-color: #3b82f6 !important;
  border-color: #60a5fa !important;
  box-shadow: 0 0 25px rgba(59, 130, 246, 0.8);
  transform: scale(1.03);
}

.memory-tile.user-clicked {
  background-color: #10b981 !important;
  border-color: #34d399 !important;
  box-shadow: 0 0 20px rgba(16, 185, 129, 0.6);
}

.memory-tile.mistake {
  background-color: #ef4444 !important;
  border-color: #f87171 !important;
  box-shadow: 0 0 20px rgba(239, 68, 68, 0.6);
  animation: shake 0.3s ease;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-6px); }
  75% { transform: translateX(6px); }
}

/* ==========================================================================
   Tool 5: Color Blindness Test Styles
   ========================================================================== */
.plate-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  margin: 1rem auto;
}

.plate-canvas-container {
  position: relative;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 4px solid var(--border-color);
  background-color: #f1f5f9;
}

.plate-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.color-input-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.625rem;
  width: 100%;
  max-width: 340px;
}

.color-choice-btn {
  padding: 0.75rem;
  font-size: 1.125rem;
  font-weight: 700;
  border: 1px solid var(--border-color);
  background-color: var(--surface-alt);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
}

.color-choice-btn:hover {
  background-color: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.medical-disclaimer {
  background-color: var(--warning-light);
  border: 1px solid var(--warning);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.875rem;
  color: var(--text-primary);
}

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

/* ==========================================================================
   Results Screen Styles
   ========================================================================== */
.results-card {
  display: none;
  background-color: var(--surface-color);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  text-align: center;
  box-shadow: var(--shadow-lg);
  margin-top: 1.5rem;
  animation: fadeIn 0.3s ease;
}

.results-card.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.result-badge {
  display: inline-block;
  background-color: var(--primary-light);
  color: var(--primary);
  font-size: 0.875rem;
  font-weight: 700;
  padding: 0.35rem 1rem;
  border-radius: var(--radius-full);
  margin-bottom: 1rem;
}

.result-main-value {
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1;
  color: var(--primary);
  font-family: var(--font-mono);
  margin-bottom: 0.5rem;
}

.result-main-label {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.result-metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 1rem;
  margin: 1.75rem 0;
  text-align: center;
}

.result-metric-box {
  background-color: var(--surface-alt);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.875rem 0.5rem;
}

.result-metric-num {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
  font-family: var(--font-mono);
}

.result-metric-desc {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
}

.result-explanation {
  background-color: var(--surface-alt);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin-bottom: 1.75rem;
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.6;
  text-align: left;
}

[dir="rtl"] .result-explanation {
  text-align: right;
}

.result-actions {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ==========================================================================
   Internal Linking Section
   ========================================================================== */
.internal-links-section {
  margin: 3rem 0;
}

.internal-links-title {
  font-size: 1.375rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  color: var(--text-primary);
}

.internal-links-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.25rem;
}

.internal-link-card {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  text-decoration: none !important;
}

.internal-link-card:hover {
  transform: translateY(-2px);
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}

.internal-link-card-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.internal-link-card-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.internal-link-arrow {
  color: var(--primary);
  font-weight: 700;
}

/* ==========================================================================
   Homepage Tools Showcase Grid
   ========================================================================== */
.home-hero {
  padding: 3rem 0 2rem;
  text-align: center;
}

.home-hero h1 {
  font-size: 2.75rem;
  font-weight: 900;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
  line-height: 1.2;
}

.home-hero p {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto 2rem;
}

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3.5rem;
}

.tool-card {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: var(--transition);
}

.tool-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.tool-card-icon {
  width: 3rem;
  height: 3rem;
  border-radius: var(--radius-md);
  background-color: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1.25rem;
}

.tool-card-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.625rem;
}

.tool-card-desc {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.5;
}

/* Language Directory Section on Homepage */
.languages-section {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin-bottom: 3.5rem;
}

.languages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 0.75rem;
  margin-top: 1.25rem;
}

.language-pill {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0.75rem;
  background-color: var(--surface-alt);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
  text-decoration: none !important;
  transition: var(--transition);
}

.language-pill:hover {
  background-color: var(--primary-light);
  border-color: var(--primary);
  color: var(--primary);
}

/* Footer */
.site-footer {
  margin-top: auto;
  background-color: var(--surface-color);
  border-top: 1px solid var(--border-color);
  padding: 2.5rem 0 1.5rem;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
  text-align: center;
}

.footer-menu {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem 1.75rem;
  font-size: 0.805rem;
  font-weight: 600;
}

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

.footer-menu a:hover {
  color: var(--primary);
  text-decoration: underline;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.5rem;
  font-size: 0.875rem;
}

.footer-nav a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition);
}

.footer-nav a:hover {
  color: var(--text-primary);
  text-decoration: underline;
}

.footer-copy {
  font-size: 0.8125rem;
  color: var(--text-muted);
}


/* Mobile Responsiveness */
@media (max-width: 768px) {
  .header-nav {
    display: none;
  }
  
  .tool-title {
    font-size: 1.75rem;
  }
  
  .home-hero h1 {
    font-size: 2rem;
  }
  
  .test-card {
    padding: 1.25rem;
  }
  
  .settings-grid {
    grid-template-columns: 1fr;
  }
  
  .live-stats-bar {
    flex-wrap: wrap;
    gap: 0.75rem;
  }
  
  .plate-canvas-container {
    width: 260px;
    height: 260px;
  }
  
  .color-input-grid {
    max-width: 280px;
  }
}

/* ==========================================================================
   Legal Pages (Privacy Policy, Terms of Service)
   ========================================================================== */
.legal-container {
  max-width: 860px;
  margin: 2.5rem auto 4rem;
}

.legal-card {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 3rem 2.5rem;
  box-shadow: var(--shadow-md);
}

.legal-header {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1.75rem;
  margin-bottom: 2rem;
}

.legal-title {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.legal-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.25rem;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.legal-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.2rem 0.65rem;
  background-color: var(--primary-light);
  color: var(--primary);
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.75rem;
}

.legal-toc {
  background-color: var(--surface-alt);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.5rem;
  margin-bottom: 2.5rem;
}

.legal-toc-title {
  font-weight: 700;
  font-size: 0.9375rem;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.legal-toc-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 0.5rem 1rem;
}

.legal-toc-list a {
  font-size: 0.875rem;
  color: var(--text-secondary);
  text-decoration: none;
}

.legal-toc-list a:hover {
  color: var(--primary);
  text-decoration: underline;
}

.legal-section {
  margin-bottom: 2.25rem;
}

.legal-section:last-child {
  margin-bottom: 0;
}

.legal-section h2 {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.875rem;
  padding-top: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.legal-section p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 1rem;
}

.legal-section ul {
  list-style: disc;
  padding-left: 1.5rem;
  margin-bottom: 1rem;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

.legal-section li {
  margin-bottom: 0.4rem;
}

.legal-callout {
  background-color: var(--primary-light);
  border-left: 4px solid var(--primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 1rem 1.25rem;
  margin: 1.25rem 0;
}

.legal-callout p {
  color: var(--text-primary);
  font-size: 0.9rem;
  margin-bottom: 0;
}

.legal-callout strong {
  color: var(--primary);
}

/* ==========================================================================
   Contact Page (fpstests.net layout with modern cards & direct channels)
   ========================================================================== */
.contact-container {
  max-width: 960px;
  margin: 2.5rem auto 4rem;
}

.contact-hero {
  text-align: center;
  margin-bottom: 3rem;
}

.contact-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.9rem;
  background-color: var(--primary-light);
  color: var(--primary);
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.8125rem;
  margin-bottom: 1rem;
}

.contact-hero h1 {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.contact-hero p {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 620px;
  margin: 0 auto;
}

/* Direct Channels Grid */
.contact-channels-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.contact-channel-card {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.75rem 1.5rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.contact-channel-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-focus);
}

.contact-channel-icon {
  width: 3rem;
  height: 3rem;
  border-radius: var(--radius-md);
  background: var(--surface-alt);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
}

.contact-channel-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.contact-channel-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.contact-email-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1rem;
  background-color: var(--primary-light);
  color: var(--primary);
  border: 1px solid rgba(5, 154, 107, 0.2);
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.875rem;
  text-decoration: none !important;
  transition: var(--transition);
}

.contact-email-btn:hover {
  background-color: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* Contact Message Form Card */
.contact-form-card {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  box-shadow: var(--shadow-md);
  margin-bottom: 3rem;
}

.contact-form-header {
  margin-bottom: 1.75rem;
}

.contact-form-header h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.35rem;
}

.contact-form-header p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.form-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
}

.contact-form .form-input,
.contact-form .form-select,
.contact-form .form-textarea {
  width: 100%;
  padding: 0.75rem 0.875rem;
  background-color: var(--surface-alt);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.9375rem;
  transition: var(--transition);
}

.contact-form .form-input:focus,
.contact-form .form-select:focus,
.contact-form .form-textarea:focus {
  outline: none;
  border-color: var(--border-focus);
  background-color: var(--surface-color);
  box-shadow: 0 0 0 3px rgba(5, 154, 107, 0.15);
}

.contact-form .form-textarea {
  min-height: 140px;
  resize: vertical;
}

.form-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 0.5rem;
}

.form-submit-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  background-color: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.form-submit-btn:hover {
  background-color: var(--primary-hover);
  transform: translateY(-1px);
}

.form-status {
  padding: 0.875rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  display: none;
}

.form-status.success {
  display: block;
  background-color: var(--success-light);
  border: 1px solid var(--success);
  color: #065f46;
}

[data-theme="dark"] .form-status.success {
  color: #6ee7b7;
}

.form-status.error {
  display: block;
  background-color: var(--danger-light);
  border: 1px solid var(--danger);
  color: #991b1b;
}

[data-theme="dark"] .form-status.error {
  color: #fca5a5;
}

/* Quick Navigation Links on Contact Page */
.contact-quick-links {
  background-color: var(--surface-alt);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.contact-quick-info {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.contact-quick-title {
  font-weight: 700;
  font-size: 0.9375rem;
  color: var(--text-primary);
}

.contact-quick-desc {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.contact-quick-buttons {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.contact-pill-btn {
  padding: 0.45rem 0.85rem;
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-decoration: none !important;
  transition: var(--transition);
}

.contact-pill-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

@media (max-width: 640px) {
  .legal-card {
    padding: 1.75rem 1.25rem;
  }
  .legal-title {
    font-size: 1.75rem;
  }
  .contact-hero h1 {
    font-size: 1.85rem;
  }
  .form-row {
    grid-template-columns: 1fr;
  }
  .contact-form-card {
    padding: 1.75rem 1.25rem;
  }
}

/* ==========================================================================
   Virtual Keyboard (Typing Speed Test)
   ========================================================================== */
.virtual-keyboard-section {
  margin-top: 1.5rem;
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.virtual-keyboard-section.vk-collapsed {
  border-color: transparent;
  background: transparent;
  box-shadow: none;
}

.virtual-keyboard-section.vk-collapsed .virtual-keyboard-body {
  max-height: 0;
  opacity: 0;
  padding: 0;
  margin: 0;
  pointer-events: none;
  overflow: hidden;
}

.vk-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1.25rem;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--surface-alt);
  transition: var(--transition);
}

.virtual-keyboard-section.vk-collapsed .vk-header {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background-color: var(--surface-color);
}

.vk-title {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--text-primary);
}

.vk-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
}

.vk-lang-tag {
  font-size: 0.725rem;
  font-weight: 600;
  padding: 0.15rem 0.5rem;
  background-color: var(--primary-light);
  color: var(--primary);
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.vk-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.35rem 0.75rem;
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.8125rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.vk-toggle-btn:hover {
  background-color: var(--surface-hover);
  color: var(--primary);
  border-color: var(--border-focus);
}

/* Quick Toggle Button in test card live stats bar */
.vk-quick-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  background-color: var(--surface-alt);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
  padding: 0;
}

.vk-quick-toggle:hover,
.vk-quick-toggle.active {
  background-color: var(--primary-light);
  color: var(--primary);
  border-color: var(--primary);
}

.virtual-keyboard-body {
  padding: 1.25rem;
  max-height: 480px;
  opacity: 1;
  transition: max-height 0.3s ease, opacity 0.25s ease, padding 0.25s ease;
}

.virtual-keyboard {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  user-select: none;
  max-width: 900px;
  margin: 0 auto;
}

.vk-row {
  display: flex;
  justify-content: center;
  gap: 0.4rem;
  width: 100%;
}

.vk-key {
  flex: 1;
  min-width: 2rem;
  height: 2.75rem;
  background-color: var(--surface-alt);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  box-shadow: 0 2px 0 rgba(0, 0, 0, 0.08);
  transition: transform 0.05s ease, background-color 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease, color 0.15s ease;
  padding: 0 0.25rem;
}

.vk-key.vk-dual {
  flex-direction: column;
  justify-content: space-around;
  padding: 0.15rem 0.2rem;
  line-height: 1.1;
}

.vk-key .vk-main {
  font-size: 0.875rem;
  font-weight: 700;
  display: block;
}

.vk-key .vk-sub {
  font-size: 0.6875rem;
  color: var(--text-muted);
  font-weight: 500;
  display: block;
}

.vk-key.key-active .vk-sub,
.vk-key:active .vk-sub {
  color: rgba(255, 255, 255, 0.85) !important;
}

.vk-key.key-next-target .vk-sub {
  color: var(--primary) !important;
}

.vk-key:hover {
  background-color: var(--surface-hover);
  border-color: var(--border-focus);
  transform: translateY(-1px);
  box-shadow: 0 3px 0 rgba(0, 0, 0, 0.12);
}

/* Physical Keyboard or Mouse Press State */
.vk-key:active,
.vk-key.key-active {
  background: linear-gradient(180deg, var(--primary), var(--primary-hover));
  border-color: var(--primary-hover);
  color: #ffffff !important;
  transform: translateY(2px) scale(0.97);
  box-shadow: 0 0 0 rgba(0, 0, 0, 0), 0 0 12px rgba(5, 154, 107, 0.5) !important;
}

/* Next Target Key Guidance Indicator */
.vk-key.key-next-target {
  border-color: var(--primary);
  background-color: var(--primary-light);
  color: var(--primary);
  box-shadow: 0 0 0 2px var(--primary-light), 0 2px 0 var(--primary);
  animation: keyPulse 1.5s infinite ease-in-out;
}

@keyframes keyPulse {
  0%, 100% {
    box-shadow: 0 0 0 2px var(--primary-light), 0 2px 0 var(--primary);
  }
  50% {
    box-shadow: 0 0 0 4px var(--primary-light), 0 2px 0 var(--primary);
  }
}

/* Special Key Widths */
.vk-key.key-space {
  flex: 6.5;
  max-width: 360px;
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.vk-key.key-backspace {
  flex: 1.8;
  font-size: 0.8125rem;
}

.vk-key.key-tab {
  flex: 1.4;
  font-size: 0.8125rem;
}

.vk-key.key-caps {
  flex: 1.6;
  font-size: 0.8125rem;
}

.vk-key.key-enter {
  flex: 1.8;
  font-size: 0.8125rem;
}

.vk-key.key-shift {
  flex: 2.2;
  font-size: 0.8125rem;
}

.vk-key.key-modifier {
  background-color: var(--surface-color);
  color: var(--text-secondary);
  font-size: 0.775rem;
  font-weight: 500;
}

.vk-key.key-caps.caps-on {
  background-color: var(--primary-light);
  color: var(--primary);
  border-color: var(--primary);
}

/* RTL Support for Arabic Keyboard */
[dir="rtl"] .virtual-keyboard {
  direction: rtl;
}

/* Mobile responsiveness for virtual keyboard */
@media (max-width: 768px) {
  .virtual-keyboard-body {
    padding: 0.75rem 0.4rem;
  }
  .vk-row {
    gap: 0.2rem;
  }
  .vk-key {
    min-width: 1.25rem;
    height: 2.25rem;
    font-size: 0.75rem;
    border-radius: 4px;
  }
  .vk-key.key-space {
    flex: 4.5;
  }
  .vk-key.key-shift,
  .vk-key.key-backspace,
  .vk-key.key-enter,
  .vk-key.key-caps,
  .vk-key.key-tab {
    font-size: 0.65rem;
    padding: 0;
  }
}

/* ==========================================================================
   Keyboard Test Tool Styles
   ========================================================================== */
.keyboard-test-card {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow-md);
}

.kb-inspector-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  background-color: var(--surface-alt);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.75rem 1.25rem;
  margin-bottom: 1.25rem;
}

.kb-inspector-group {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.kb-inspector-item {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.kb-inspector-label {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

.kb-inspector-val {
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary);
  font-family: var(--font-mono);
  min-width: 2.5rem;
}

.kb-board-container,
.kb-board-scaler {
  width: 100%;
  max-width: 100%;
  overflow: hidden;
  position: relative;
  margin-bottom: 1.5rem;
  box-sizing: border-box;
  direction: ltr !important;
}

.keyboard-test-board {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  width: 100%;
  max-width: 100%;
  background: linear-gradient(180deg, var(--surface-alt), var(--surface-color));
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 0.85rem;
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.05), var(--shadow-md);
  box-sizing: border-box;
  transform-origin: top left;
  user-select: none;
  direction: ltr !important;
}

.keyboard-test-board.theme-light {
  background: #ffffff;
  border-color: #cbd5e1;
}

.keyboard-test-board.theme-dark {
  background: #0f172a;
  border-color: #334155;
}

.keyboard-test-board.theme-neon {
  background: #090d16;
  border-color: #06b6d4;
  box-shadow: 0 0 20px rgba(6, 182, 212, 0.25);
}

.kb-row {
  display: flex;
  gap: 0.35rem;
  width: 100%;
}

.kb-row-fn {
  margin-bottom: 0.35rem;
}

.kb-key {
  flex: 1;
  min-width: 2.1rem;
  height: 2.8rem;
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.8125rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  user-select: none;
  transition: transform 0.08s ease, background-color 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
  box-shadow: 0 2px 0 rgba(0, 0, 0, 0.1);
  padding: 0.2rem;
  position: relative;
}

.kb-key-dual {
  flex-direction: column;
  justify-content: space-around;
  line-height: 1.1;
  padding: 0.2rem 0.15rem;
}

.kb-key-sub {
  font-size: 0.6875rem;
  color: var(--text-muted);
  font-weight: 500;
}

.kb-key-main {
  font-size: 0.8125rem;
  font-weight: 600;
}

.kb-key.key-fn {
  height: 2.25rem;
  font-size: 0.72rem;
  background-color: var(--surface-alt);
}

.kb-key.key-space {
  flex: 6.5;
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.kb-key.key-backspace {
  flex: 2;
  font-size: 0.785rem;
}

.kb-key.key-tab {
  flex: 1.5;
  font-size: 0.785rem;
}

.kb-key.key-caps {
  flex: 1.75;
  font-size: 0.785rem;
}

.kb-key.key-enter {
  flex: 2.25;
  font-size: 0.785rem;
}

.kb-key.key-shift {
  flex: 2.5;
  font-size: 0.785rem;
}

.kb-key.key-modifier,
.kb-key.key-nav,
.kb-key.key-arrow,
.kb-key.key-num {
  font-size: 0.75rem;
  background-color: var(--surface-alt);
}

.kb-key.key-spacer {
  border: none;
  background: transparent;
  box-shadow: none;
  pointer-events: none;
}

.kb-key:hover {
  border-color: var(--border-focus);
  transform: translateY(-1px);
}

.kb-key.key-tested {
  background-color: var(--success-light);
  border-color: var(--success);
  color: var(--success);
  font-weight: 700;
  box-shadow: 0 2px 0 rgba(16, 185, 129, 0.2);
}

.kb-key.key-tested .kb-key-sub {
  color: var(--success);
  opacity: 0.8;
}

.kb-key.key-pressing {
  background: linear-gradient(180deg, var(--primary), var(--primary-hover)) !important;
  border-color: var(--primary-hover) !important;
  color: #ffffff !important;
  transform: translateY(2px) scale(0.97) !important;
  box-shadow: 0 0 12px rgba(5, 154, 107, 0.6) !important;
}

.kb-key.key-pressing .kb-key-sub,
.kb-key.key-pressing .kb-key-main {
  color: #ffffff !important;
}

.kb-history-container {
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
}

.kb-history-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.5rem;
}

.kb-history-title {
  font-size: 0.785rem;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.kb-history-list {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
  min-height: 2rem;
  align-items: center;
}

.kb-history-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  background-color: var(--surface-alt);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.2rem 0.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  animation: badgeIn 0.15s ease-out;
}

.kb-badge-key {
  color: var(--primary);
  font-family: var(--font-mono);
}

.kb-badge-ms {
  font-size: 0.6875rem;
  color: var(--text-muted);
}

@keyframes badgeIn {
  from { opacity: 0; transform: scale(0.85); }
  to { opacity: 1; transform: scale(1); }
}

@media (max-width: 900px) {
  .keyboard-test-card {
    padding: 1rem;
  }
  .kb-inspector-card {
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
  }
}

/* ==============================================================================
   KEYBOARD TEST ENHANCEMENTS: Mac, Laptop, Media Rack & Touchpad Tester
   ============================================================================== */

/* Mac Key Styling */
.kb-key.key-mac-fn {
  color: #06b6d4;
  font-size: 0.75rem;
}

.kb-key.key-cmd {
  font-weight: 700;
  font-size: 0.785rem;
}

.kb-key.key-opt {
  font-size: 0.785rem;
}

/* Laptop Arrow Cluster (Half-Height Inverted-T) */
.kb-laptop-arrow-col {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  flex: 1;
  min-width: 32px;
}

.kb-key.key-arrow-half {
  min-height: 18px !important;
  height: 18px !important;
  font-size: 0.65rem !important;
  padding: 0 !important;
  line-height: 18px !important;
}

/* Multimedia & System Keys Rack */
.kb-media-rack-container {
  margin-bottom: 1rem;
  background-color: var(--surface-alt);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.625rem 0.875rem;
}

.kb-media-rack-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.5rem;
}

.kb-media-rack-title {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.kb-media-rack-keys {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
  align-items: center;
}

.kb-media-btn {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background-color: var(--surface-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.25rem 0.55rem;
  min-height: 32px;
  min-width: 44px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.kb-media-btn:hover {
  border-color: var(--border-focus);
  background-color: var(--surface-hover);
}

.kb-media-btn.key-pressing {
  background: linear-gradient(180deg, var(--primary), var(--primary-hover)) !important;
  border-color: var(--primary-hover) !important;
  color: #ffffff !important;
  transform: translateY(1px) scale(0.97);
}

.kb-media-btn.key-tested {
  background-color: var(--success-light);
  border-color: var(--success);
  color: var(--success);
  font-weight: 700;
}

/* Touchpad & Mouse Tester */
.kb-touchpad-card {
  margin-top: 1.5rem;
  background-color: var(--surface-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.03);
}

.kb-touchpad-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-color);
}

.kb-touchpad-title {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.kb-touchpad-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.kb-coords-pill {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--primary);
  background-color: var(--surface-alt);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.2rem 0.5rem;
}

.kb-touchpad-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 1.25rem;
  align-items: stretch;
}

@media (max-width: 768px) {
  .kb-touchpad-grid {
    grid-template-columns: 1fr;
  }
}

/* Trackpad Surface Area */
.touchpad-col {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.touchpad-surface {
  position: relative;
  height: 180px;
  background-color: var(--surface-alt);
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  touch-action: none;
  cursor: crosshair;
  display: flex;
  align-items: center;
  justify-content: center;
  user-select: none;
  transition: border-color var(--transition-fast);
}

.touchpad-surface.touchpad-active {
  border-color: var(--primary);
  border-style: solid;
  background: radial-gradient(circle at center, rgba(5, 154, 107, 0.05) 0%, transparent 70%);
}

.touchpad-watermark {
  font-size: 0.785rem;
  color: var(--text-muted);
  font-weight: 500;
  text-align: center;
  pointer-events: none;
  padding: 0 1rem;
}

.touchpad-reticle {
  position: absolute;
  width: 24px;
  height: 24px;
  margin-left: -12px;
  margin-top: -12px;
  border-radius: 50%;
  border: 2px solid var(--primary);
  background: rgba(5, 154, 107, 0.2);
  pointer-events: none;
  transform: scale(0);
  transition: transform 0.08s ease-out;
}

.touchpad-reticle.active {
  transform: scale(1);
  box-shadow: 0 0 12px rgba(5, 154, 107, 0.6);
}

.touchpad-touch-points {
  position: absolute;
  top: 0.5rem;
  right: 0.5rem;
  font-size: 0.6875rem;
  background: rgba(0, 0, 0, 0.6);
  color: #ffffff;
  padding: 0.15rem 0.45rem;
  border-radius: 10px;
  font-family: var(--font-mono);
  pointer-events: none;
}

/* Touchpad Physical Buttons */
.touchpad-buttons-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.35rem;
}

.touchpad-btn {
  height: 38px;
  background-color: var(--surface-alt);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition-fast);
  user-select: none;
}

.touchpad-btn:hover {
  background-color: var(--surface-hover);
  border-color: var(--border-focus);
}

.touchpad-btn.mouse-active {
  background: linear-gradient(180deg, var(--primary), var(--primary-hover)) !important;
  color: #ffffff !important;
  border-color: var(--primary-hover) !important;
  transform: translateY(2px);
}

/* Mouse Buttons & Wheel Panel */
.mouse-col {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  justify-content: space-between;
}

.mouse-buttons-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.4rem;
}

.mouse-btn-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background-color: var(--surface-alt);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.5rem 0.4rem;
  min-height: 54px;
  cursor: pointer;
  user-select: none;
  transition: var(--transition-fast);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
}

.mouse-btn-box:hover {
  border-color: var(--border-focus);
  background-color: var(--surface-hover);
}

.mouse-btn-box.mouse-active {
  background: linear-gradient(180deg, var(--primary), var(--primary-hover)) !important;
  border-color: var(--primary-hover) !important;
  color: #ffffff !important;
  transform: scale(0.97);
  box-shadow: 0 0 10px rgba(5, 154, 107, 0.5);
}

.mouse-btn-box.mouse-active .mouse-btn-label,
.mouse-btn-box.mouse-active .mouse-btn-count {
  color: #ffffff !important;
}

.mouse-btn-label {
  font-size: 0.725rem;
  font-weight: 700;
  color: var(--text-primary);
  text-align: center;
}

.mouse-btn-count {
  font-size: 0.6875rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  margin-top: 0.15rem;
}

.mouse-side-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.4rem;
}

/* Scroll Wheel Visualizer */
.scroll-wheel-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: var(--surface-alt);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.625rem 0.875rem;
  gap: 0.75rem;
}

.scroll-gauge-left {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.scroll-wheel-icon {
  width: 32px;
  height: 44px;
  border: 2px solid var(--border-color);
  border-radius: 16px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--surface-card);
}

.scroll-wheel-nub {
  width: 6px;
  height: 12px;
  background-color: var(--primary);
  border-radius: 3px;
  transition: transform 0.1s ease-out;
}

.scroll-wheel-nub.scroll-up {
  transform: translateY(-4px);
}

.scroll-wheel-nub.scroll-down {
  transform: translateY(4px);
}

.scroll-dir-arrows {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.scroll-arrow {
  font-size: 0.75rem;
  color: var(--text-muted);
  transition: color 0.1s, transform 0.1s;
}

.scroll-arrow.active {
  color: var(--success);
  font-weight: 700;
  transform: scale(1.25);
}

.scroll-stats {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.scroll-stat-item {
  font-size: 0.725rem;
  color: var(--text-secondary);
}

.scroll-stat-val {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--text-primary);
}

/* 404 Error Page Styling */
.error-container {
  max-width: 960px;
  margin: 1.5rem auto 4rem auto;
}

.error-hero {
  padding: 3.5rem 1.5rem 2rem 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.error-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.9rem;
  background-color: var(--primary-light);
  color: var(--primary);
  border: 1px solid rgba(5, 154, 107, 0.25);
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1.25rem;
}

.error-code {
  font-size: clamp(5.5rem, 16vw, 9rem);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.04em;
  background: linear-gradient(135deg, var(--primary) 0%, #10b981 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 0.75rem;
  filter: drop-shadow(0 8px 24px rgba(5, 154, 107, 0.25));
}

.error-title {
  font-size: clamp(1.6rem, 3.5vw, 2.25rem);
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
}

.error-desc {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  max-width: 580px;
  line-height: 1.6;
  margin: 0 auto 2rem auto;
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 3rem;
}

.error-btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.9375rem;
  background-color: var(--primary);
  color: #ffffff !important;
  text-decoration: none !important;
  box-shadow: 0 4px 14px rgba(5, 154, 107, 0.35);
  transition: var(--transition);
}

.error-btn-primary:hover {
  background-color: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(5, 154, 107, 0.45);
}

.error-btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.9375rem;
  background-color: var(--surface-color);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  text-decoration: none !important;
  transition: var(--transition);
}

.error-btn-secondary:hover {
  background-color: var(--surface-alt);
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
}

.error-tools-section {
  margin-top: 1rem;
}

.error-tools-header {
  margin-bottom: 1.5rem;
  text-align: center;
}

.error-tools-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.35rem;
}

.error-tools-subtitle {
  font-size: 0.875rem;
  color: var(--text-secondary);
}