/* ==========================================================================
   AI TRANSLATOR - COMPLETE CONSOLIDATED DESIGN SYSTEM & STYLESHEET
   Pure Vanilla CSS3 - Mobile-First, Accessible (WCAG 2.1 AA), Zero Dependencies
   ========================================================================== */

:root {
  /* Color Palette - Light Mode */
  --bg-primary: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #ffffff;
  --bg-muted: #f1f5f9;
  --bg-hover: #e2e8f0;
  --bg-subtle: #f8fafc;

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-inverse: #ffffff;

  --border-subtle: #e2e8f0;
  --border-default: #cbd5e1;
  --border-focus: #2563eb;

  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --primary-active: #1e40af;
  --primary-subtle: #eff6ff;
  --primary-text: #1d4ed8;

  --accent: #0d9488;
  --accent-subtle: #f0fdfa;
  
  --success: #16a34a;
  --success-subtle: #f0fdf4;
  --warning: #d97706;
  --warning-subtle: #fffbeb;
  --danger: #dc2626;
  --danger-subtle: #fef2f2;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.04);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);

  --container-max: 1200px;
  --header-height: 72px;
}

[data-theme="dark"] {
  --bg-primary: #090d16;
  --bg-surface: #111827;
  --bg-surface-elevated: #1a2234;
  --bg-muted: #1e293b;
  --bg-hover: #334155;
  --bg-subtle: #0f172a;

  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --text-inverse: #0f172a;

  --border-subtle: #1e293b;
  --border-default: #334155;
  --border-focus: #3b82f6;

  --primary: #3b82f6;
  --primary-hover: #60a5fa;
  --primary-active: #93c5fd;
  --primary-subtle: #1e293b;
  --primary-text: #60a5fa;

  --accent: #14b8a6;
  --accent-subtle: #132e2e;

  --success: #22c55e;
  --success-subtle: #142e1f;
  --warning: #f59e0b;
  --warning-subtle: #2d2411;
  --danger: #ef4444;
  --danger-subtle: #311818;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.5), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -4px rgba(0, 0, 0, 0.3);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6), 0 8px 10px -6px rgba(0, 0, 0, 0.4);
}

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

html {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  overflow-x: hidden;
}

/* Accessibility Focus States */
:focus-visible {
  outline: 2px solid var(--border-focus);
  outline-offset: 2px;
}

/* Typography Standards */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2rem, 4vw + 1rem, 3.25rem); margin-bottom: 1rem; }
h2 { font-size: clamp(1.5rem, 2.5vw + 0.75rem, 2.25rem); margin-top: 2rem; margin-bottom: 1rem; }
h3 { font-size: clamp(1.25rem, 1.5vw + 0.5rem, 1.5rem); margin-top: 1.5rem; margin-bottom: 0.75rem; }
h4 { font-size: 1.15rem; margin-bottom: 0.5rem; }

p {
  margin-bottom: 1.25rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

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

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

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

.section {
  padding-top: 3.5rem;
  padding-bottom: 3.5rem;
}

@media (min-width: 768px) {
  .section {
    padding-top: 5rem;
    padding-bottom: 5rem;
  }
}

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-height);
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: -0.03em;
}

.brand-logo:hover {
  text-decoration: none;
}

.brand-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--primary), #4f46e5);
  color: white;
  border-radius: var(--radius-md);
  font-weight: 900;
  font-size: 1.1rem;
}

.site-nav {
  display: none;
  align-items: center;
  gap: 1.5rem;
}

@media (min-width: 860px) {
  .site-nav {
    display: flex;
  }
}

.nav-link {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  text-decoration: none;
}

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

@media (min-width: 860px) {
  .header-actions {
    gap: 0.75rem;
  }
}

@media (max-width: 859px) {
  .header-actions .btn.btn-primary {
    display: none;
  }
  .header-menu-container {
    display: none;
  }
}

@media (max-width: 480px) {
  .header-actions #openHistoryBtn,
  .header-actions #openApiSettingsBtn {
    display: none;
  }
}

/* Button Component */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-fast);
  text-decoration: none;
  user-select: none;
  min-height: 44px;
}

.btn:hover {
  text-decoration: none;
}

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

.btn-primary:hover {
  background-color: var(--primary-hover);
  color: #ffffff;
}

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

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

.btn-subtle {
  background-color: transparent;
  color: var(--text-secondary);
}

.btn-subtle:hover {
  color: var(--text-primary);
  background-color: var(--bg-muted);
}

.btn-icon {
  width: 42px;
  height: 42px;
  min-width: 42px;
  min-height: 42px;
  padding: 0;
  border-radius: var(--radius-md);
  background-color: var(--bg-muted);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

.mobile-menu-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

@media (min-width: 860px) {
  .mobile-menu-toggle {
    display: none;
  }
}

/* Mobile Navigation Drawer */
.mobile-drawer {
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  z-index: 90;
  display: flex;
  flex-direction: column;
  padding: 1.25rem;
  padding-bottom: max(1.5rem, env(safe-area-inset-bottom));
  gap: 0.5rem;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  transform: translateY(-100%);
  opacity: 0;
  pointer-events: none;
  box-shadow: var(--shadow-xl);
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.25s ease;
}

.mobile-drawer.open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.mobile-drawer-quick-actions {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.625rem;
  margin-bottom: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-subtle);
}

.mobile-drawer-quick-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 0.75rem;
  background-color: var(--bg-muted);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-fast);
  min-height: 44px;
}

.mobile-drawer-quick-btn:hover {
  background-color: var(--primary-subtle);
  color: var(--primary);
  border-color: var(--primary);
}

.mobile-nav-section-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  padding: 0.5rem 0.5rem 0.25rem 0.5rem;
}

.mobile-nav-link {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  padding: 0.75rem 0.875rem;
  border-radius: var(--radius-md);
  text-decoration: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 44px;
  transition: all var(--transition-fast);
}

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

/* ==========================================================================
   TRANSLATOR WORKSPACE COMPONENT
   ========================================================================== */

.translator-workspace {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  margin-bottom: 2.5rem;
}

@media (max-width: 640px) {
  .translator-workspace {
    border-radius: var(--radius-md);
    margin-bottom: 1.75rem;
    box-shadow: var(--shadow-md);
  }
}

/* Mode / Tone Selector Bar */
.translator-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.875rem 1.25rem;
  background-color: var(--bg-muted);
  border-bottom: 1px solid var(--border-subtle);
}

@media (max-width: 640px) {
  .translator-toolbar {
    padding: 0.625rem 0.875rem;
    gap: 0.5rem;
  }
}

.tone-selector-group {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  overflow-x: auto;
  padding-bottom: 4px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.tone-selector-group::-webkit-scrollbar {
  display: none;
}

.tone-label {
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-right: 0.375rem;
  white-space: nowrap;
}

.tone-pill {
  padding: 0.375rem 0.875rem;
  font-size: 0.8125rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-fast);
  min-height: 38px;
  display: inline-flex;
  align-items: center;
}

.tone-pill:hover {
  border-color: var(--border-default);
  color: var(--text-primary);
}

.tone-pill.active {
  background-color: var(--primary);
  border-color: var(--primary);
  color: #ffffff;
}

.engine-status-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.25rem 0.625rem;
  font-size: 0.75rem;
  font-weight: 600;
  background-color: var(--success-subtle);
  color: var(--success);
  border-radius: var(--radius-full);
  border: 1px solid rgba(22, 163, 74, 0.2);
  min-height: 28px;
}

.engine-status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--success);
  box-shadow: 0 0 6px var(--success);
}

/* Language Selection Header */
.lang-selector-bar {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.25rem;
  border-bottom: 1px solid var(--border-subtle);
  background-color: var(--bg-surface);
}

@media (max-width: 640px) {
  .lang-selector-bar {
    grid-template-columns: 1fr 44px 1fr;
    padding: 0.625rem 0.75rem;
    gap: 0.35rem;
  }
}

.lang-select-wrapper {
  position: relative;
  width: 100%;
}

.lang-select {
  width: 100%;
  appearance: none;
  -webkit-appearance: none;
  background-color: var(--bg-muted);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.625rem 2.25rem 0.625rem 0.875rem;
  font-size: 16px !important;
  font-weight: 600;
  cursor: pointer;
  min-height: 44px;
  text-overflow: ellipsis;
  transition: all var(--transition-fast);
}

@media (max-width: 640px) {
  .lang-select {
    padding: 0.55rem 1.85rem 0.55rem 0.625rem;
    font-size: 0.9375rem !important;
  }
}

.lang-select:hover {
  border-color: var(--border-default);
  background-color: var(--bg-hover);
}

.lang-select:focus {
  border-color: var(--primary);
  background-color: var(--bg-surface);
}

.lang-select-arrow {
  position: absolute;
  right: 0.875rem;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
  color: var(--text-muted);
  font-size: 0.75rem;
}

@media (max-width: 640px) {
  .lang-select-arrow {
    right: 0.5rem;
  }
}

.btn-swap-lang {
  width: 44px;
  height: 44px;
  min-width: 44px;
  min-height: 44px;
  border-radius: var(--radius-full);
  background-color: var(--bg-muted);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-swap-lang:hover {
  background-color: var(--primary-subtle);
  color: var(--primary);
  transform: rotate(180deg);
}

/* Quick language pills */
.quick-lang-bar {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.5rem 1.25rem;
  background-color: var(--bg-subtle);
  border-bottom: 1px solid var(--border-subtle);
  overflow-x: auto;
  font-size: 0.8125rem;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.quick-lang-bar::-webkit-scrollbar {
  display: none;
}

@media (max-width: 640px) {
  .quick-lang-bar {
    padding: 0.375rem 0.75rem;
  }
}

.quick-lang-btn {
  padding: 0.25rem 0.625rem;
  border-radius: var(--radius-sm);
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.8125rem;
  font-weight: 500;
  white-space: nowrap;
  min-height: 32px;
  display: inline-flex;
  align-items: center;
}

.quick-lang-btn:hover {
  color: var(--primary);
  background: var(--bg-hover);
}

/* Translation Grid (Panels) */
.translation-grid {
  display: grid;
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .translation-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.panel-source, .panel-output {
  display: flex;
  flex-direction: column;
  min-height: 280px;
  position: relative;
  background-color: var(--bg-surface);
}

@media (min-width: 768px) {
  .panel-source {
    border-right: 1px solid var(--border-subtle);
  }
}

@media (max-width: 767px) {
  .panel-source {
    border-bottom: 1px solid var(--border-subtle);
  }
  .panel-source, .panel-output {
    min-height: 200px;
  }
}

.panel-textarea-wrapper {
  position: relative;
  flex: 1;
  display: flex;
}

.translation-textarea {
  width: 100%;
  height: 100%;
  min-height: 200px;
  padding: 1.25rem;
  background-color: transparent;
  color: var(--text-primary);
  border: none;
  resize: none;
  font-family: inherit;
  font-size: 16px !important;
  line-height: 1.65;
}

@media (max-width: 640px) {
  .translation-textarea {
    min-height: 160px;
    padding: 0.875rem;
    line-height: 1.55;
  }
}

.translation-textarea:focus {
  outline: none;
}

.translation-textarea::placeholder {
  color: var(--text-muted);
}

.output-container {
  width: 100%;
  height: 100%;
  min-height: 200px;
  padding: 1.25rem;
  font-size: 16px !important;
  line-height: 1.65;
  color: var(--text-primary);
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-word;
}

@media (max-width: 640px) {
  .output-container {
    min-height: 160px;
    padding: 0.875rem;
    line-height: 1.55;
  }
}

.output-placeholder {
  color: var(--text-muted);
  user-select: none;
}

/* Panel Footer / Action Bar */
.panel-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.25rem;
  background-color: var(--bg-subtle);
  border-top: 1px solid var(--border-subtle);
}

@media (max-width: 640px) {
  .panel-footer {
    padding: 0.5rem 0.75rem;
  }
}

.panel-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.panel-actions {
  display: flex;
  align-items: center;
  gap: 0.375rem;
}

.action-btn {
  width: 42px;
  height: 42px;
  min-width: 42px;
  min-height: 42px;
  border-radius: var(--radius-sm);
  background-color: transparent;
  border: 1px solid transparent;
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

.action-btn.active, .action-btn.recording {
  background-color: var(--danger-subtle);
  color: var(--danger);
  border-color: var(--danger);
  animation: pulse-danger 1.5s infinite;
}

.action-btn.speaking {
  background-color: var(--primary-subtle);
  color: var(--primary);
  border-color: var(--primary);
}

@keyframes pulse-danger {
  0% { transform: scale(1); }
  50% { transform: scale(1.08); }
  100% { transform: scale(1); }
}

/* Bottom CTA / Translate Button Bar */
.translator-submit-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background-color: var(--bg-muted);
  border-top: 1px solid var(--border-subtle);
}

@media (max-width: 640px) {
  .translator-submit-bar {
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
    padding: 0.875rem;
  }
}

.submit-left {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

@media (max-width: 640px) {
  .submit-left {
    justify-content: space-between;
    width: 100%;
  }
}

.submit-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

@media (max-width: 640px) {
  .submit-right {
    width: 100%;
  }
  .submit-right .btn-primary,
  .submit-right #translateBtn {
    width: 100%;
    justify-content: center;
    min-height: 48px;
    font-size: 1.05rem;
    font-weight: 700;
  }
}

/* ==========================================================================
   HISTORY & API SETTINGS MODALS / DRAWERS
   ========================================================================== */

.modal-backdrop,
.modal-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(15, 23, 42, 0.65);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

@media (max-width: 640px) {
  .modal-backdrop,
  .modal-overlay {
    align-items: flex-end;
    padding: 0;
  }
}

.modal-backdrop.open,
.modal-backdrop.active,
.modal-backdrop.show,
.modal-overlay.open,
.modal-overlay.active,
.modal-overlay.show {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.modal-card,
.modal-container {
  width: 100%;
  max-width: 600px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  max-height: 88vh;
  display: flex;
  flex-direction: column;
  transform: translateY(20px) scale(0.97);
  transition: transform var(--transition-normal), opacity var(--transition-normal);
}

@media (max-width: 640px) {
  .modal-card,
  .modal-container {
    max-width: 100%;
    border-radius: 20px 20px 0 0;
    max-height: 86vh;
    border-bottom: none;
    transform: translateY(100%);
  }
}

.modal-backdrop.open .modal-card,
.modal-backdrop.active .modal-card,
.modal-backdrop.show .modal-card,
.modal-overlay.open .modal-container,
.modal-overlay.active .modal-container,
.modal-overlay.show .modal-container {
  transform: translateY(0) scale(1);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-subtle);
  background-color: var(--bg-surface);
}

@media (max-width: 640px) {
  .modal-header {
    padding: 1rem 1.25rem;
  }
}

.modal-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0;
  color: var(--text-primary);
}

.modal-body {
  padding: 1.5rem;
  overflow-y: auto;
  flex: 1;
  -webkit-overflow-scrolling: touch;
}

@media (max-width: 640px) {
  .modal-body {
    padding: 1rem 1.25rem;
  }
}

.modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.75rem;
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border-subtle);
  background-color: var(--bg-subtle);
}

@media (max-width: 640px) {
  .modal-footer {
    padding: 0.875rem 1.25rem;
    padding-bottom: max(1.25rem, env(safe-area-inset-bottom));
  }
}

/* Form Styles */
.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-weight: 600;
  font-size: 0.875rem;
  margin-bottom: 0.375rem;
  color: var(--text-primary);
}

.form-input, .form-textarea {
  width: 100%;
  padding: 0.625rem 0.875rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-default);
  background-color: var(--bg-surface);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.9375rem;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus, .form-textarea:focus {
  border-color: var(--primary);
  outline: none;
  box-shadow: 0 0 0 3px var(--primary-subtle);
}

.form-help {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-top: 0.375rem;
}

/* History List Component */
.history-list {
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
}

.history-item {
  padding: 1rem 1.25rem;
  border-radius: var(--radius-md);
  background-color: var(--bg-muted);
  border: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
  transition: all var(--transition-fast);
}

.history-item:hover {
  border-color: var(--border-default);
  background-color: var(--bg-surface-elevated);
  box-shadow: var(--shadow-sm);
}

.history-item-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
}

.history-item-langs {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.history-lang-tag {
  background-color: var(--primary-subtle);
  color: var(--primary);
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-sm);
  font-weight: 700;
}

.history-item-body {
  font-size: 0.9375rem;
  color: var(--text-primary);
  line-height: 1.5;
}

.history-item-source {
  color: var(--text-secondary);
  font-size: 0.875rem;
  padding-bottom: 0.35rem;
  border-bottom: 1px dashed var(--border-subtle);
}

.history-item-target {
  font-weight: 500;
  color: var(--text-primary);
}

.history-item-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding-top: 0.25rem;
}

.history-empty-state {
  text-align: center;
  padding: 3rem 1.5rem;
  color: var(--text-muted);
}

.history-empty-icon {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
  opacity: 0.6;
}

/* Toast Notifications */
.toast-container,
#toastContainer {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
  pointer-events: none;
  max-width: calc(100vw - 3rem);
}

@media (max-width: 640px) {
  .toast-container,
  #toastContainer {
    bottom: 1rem;
    right: 1rem;
    left: 1rem;
    max-width: none;
  }
}

.toast {
  padding: 0.875rem 1.25rem;
  background-color: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
  font-size: 0.9rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.65rem;
  pointer-events: auto;
  animation: toast-in 0.28s cubic-bezier(0.16, 1, 0.3, 1);
  transition: opacity 0.2s, transform 0.2s;
  min-width: 240px;
}

@media (max-width: 640px) {
  .toast {
    width: 100%;
    min-width: 0;
    font-size: 0.875rem;
    padding: 0.75rem 1rem;
  }
}

.toast.toast-success {
  border-left: 4px solid var(--success);
}

.toast.toast-error {
  border-left: 4px solid var(--danger);
}

.toast.toast-warning {
  border-left: 4px solid var(--warning);
}

.toast.toast-info {
  border-left: 4px solid var(--primary);
}

.toast-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

@keyframes toast-in {
  from { transform: translateY(16px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

/* Recording Pulse & Speech Visual Feedback */
.btn-icon.recording,
#micBtn.recording,
#voiceRecordBtn.recording {
  background-color: #fee2e2 !important;
  color: #dc2626 !important;
  border-color: #f87171 !important;
  animation: mic-pulse 1.4s infinite ease-in-out;
}

[data-theme="dark"] .btn-icon.recording,
[data-theme="dark"] #micBtn.recording,
[data-theme="dark"] #voiceRecordBtn.recording {
  background-color: #450a0a !important;
  color: #fca5a5 !important;
  border-color: #b91c1c !important;
}

@keyframes mic-pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(220, 38, 38, 0.6);
    transform: scale(1);
  }
  50% {
    box-shadow: 0 0 0 10px rgba(220, 38, 38, 0);
    transform: scale(1.05);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(220, 38, 38, 0);
    transform: scale(1);
  }
}

/* Button Loading Spinner State */
.btn-primary.loading,
.btn.loading,
.btn-loading {
  position: relative;
  pointer-events: none;
  opacity: 0.85;
}

.btn-primary.loading .btn-text,
.btn.loading .btn-text {
  visibility: hidden;
}

.spinner-icon {
  display: inline-block;
  width: 18px;
  height: 18px;
  border: 2.5px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: #ffffff;
  animation: spin 0.75s linear infinite;
}

.spinner-icon-dark {
  border-color: rgba(37, 99, 235, 0.2);
  border-top-color: var(--primary);
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Language Swap Icon Rotation Animation */
.swap-icon-spin {
  animation: icon-flip 0.4s ease;
}

@keyframes icon-flip {
  0% { transform: rotate(0deg); }
  50% { transform: rotate(180deg) scale(1.15); }
  100% { transform: rotate(360deg); }
}

/* ==========================================================================
   SEO CONTENT & EDITORIAL STYLING
   ========================================================================== */

.seo-article {
  max-width: 860px;
  margin-left: auto;
  margin-right: auto;
  padding-top: 2rem;
}

.editorial-header {
  margin-bottom: 2.5rem;
  text-align: center;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.3125rem 0.75rem;
  font-size: 0.8125rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  background-color: var(--primary-subtle);
  color: var(--primary-text);
  margin-bottom: 1rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin: 2rem 0;
}

@media (min-width: 640px) {
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .feature-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.feature-card {
  padding: 1.5rem;
  border-radius: var(--radius-lg);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

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

.feature-icon-wrapper {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background-color: var(--primary-subtle);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  margin-bottom: 1rem;
}

/* Comparison Table */
.comparison-table-wrapper {
  width: 100%;
  overflow-x: auto;
  margin: 2rem 0;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-sm);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  background-color: var(--bg-surface);
  font-size: 0.9375rem;
}

.comparison-table th, .comparison-table td {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border-subtle);
}

.comparison-table th {
  background-color: var(--bg-muted);
  font-weight: 700;
  color: var(--text-primary);
}

.comparison-table tr:last-child td {
  border-bottom: none;
}

.comparison-table .highlight-col {
  background-color: var(--primary-subtle);
  font-weight: 600;
}

/* Accordion FAQ Component */
.faq-accordion {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin: 2rem 0;
}

.accordion-item {
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  background-color: var(--bg-surface);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.accordion-item:hover {
  border-color: var(--border-default);
}

.accordion-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--text-primary);
  background: transparent;
  border: none;
  cursor: pointer;
  text-align: left;
  gap: 1rem;
}

.accordion-icon {
  width: 20px;
  height: 20px;
  transition: transform var(--transition-normal);
  color: var(--text-muted);
  flex-shrink: 0;
}

.accordion-item.open .accordion-icon {
  transform: rotate(180deg);
  color: var(--primary);
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal);
}

.accordion-item.open .accordion-content {
  max-height: 500px;
}

.accordion-body {
  padding: 0 1.5rem 1.25rem 1.5rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* Callout Box */
.callout {
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius-md);
  border-left: 4px solid var(--primary);
  background-color: var(--primary-subtle);
  margin: 1.5rem 0;
}

.callout p {
  margin-bottom: 0;
  color: var(--text-primary);
}

/* Breadcrumb Navigation */
.breadcrumb-nav {
  padding: 1rem 0;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  list-style: none;
  flex-wrap: wrap;
}

.breadcrumb-separator {
  color: var(--text-muted);
}

/* Footer Styling */
.site-footer {
  margin-top: auto;
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  padding: 4rem 0 2rem 0;
  color: var(--text-secondary);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  margin-bottom: 3rem;
}

@media (min-width: 640px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }
}

.footer-col h4 {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1.25rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-link {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--primary);
  text-decoration: none;
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* Author & E-E-A-T Card */
.author-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem;
  background-color: var(--bg-muted);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  margin: 2rem 0;
}

.author-avatar {
  width: 54px;
  height: 54px;
  border-radius: 50%;
  background: linear-gradient(135deg, #3b82f6, #8b5cf6);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.author-info h4 {
  margin-bottom: 0.25rem;
  font-size: 1rem;
}

.author-info p {
  margin-bottom: 0;
  font-size: 0.8125rem;
}

/* Screen Reader Only Helper */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* ==========================================================================
   TOP-RIGHT MENU & NAVIGATION DROPDOWNS
   ========================================================================== */

.nav-item-dropdown {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.nav-dropdown-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  cursor: pointer;
  background: none;
  border: none;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.nav-dropdown-toggle:hover,
.nav-item-dropdown:hover .nav-dropdown-toggle,
.nav-item-dropdown:focus-within .nav-dropdown-toggle {
  color: var(--primary);
  background-color: var(--primary-subtle);
}

.nav-dropdown-arrow {
  font-size: 0.75rem;
  transition: transform var(--transition-fast);
}

.nav-item-dropdown:hover .nav-dropdown-arrow,
.nav-item-dropdown:focus-within .nav-dropdown-arrow {
  transform: rotate(180deg);
}

.nav-dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 240px;
  padding: 0.5rem;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all var(--transition-fast);
  z-index: 60;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.nav-item-dropdown:hover .nav-dropdown-menu,
.nav-item-dropdown:focus-within .nav-dropdown-menu,
.nav-dropdown-menu.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(4px);
}

.nav-dropdown-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.625rem 0.75rem;
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  text-decoration: none;
  transition: all var(--transition-fast);
}

.nav-dropdown-item:hover {
  background-color: var(--primary-subtle);
  color: var(--primary);
  text-decoration: none;
}

.nav-dropdown-item-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background-color: var(--bg-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  flex-shrink: 0;
}

.nav-dropdown-item-content {
  display: flex;
  flex-direction: column;
}

.nav-dropdown-item-title {
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1.3;
}

.nav-dropdown-item-desc {
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.2;
}

/* Header Menu Popover (Top Right Comprehensive Menu) */
.header-menu-container {
  position: relative;
}

.header-menu-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.5rem 0.875rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  background-color: var(--bg-muted);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.header-menu-btn:hover, .header-menu-btn.active {
  background-color: var(--bg-hover);
  border-color: var(--border-default);
}

.header-menu-popover {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: 340px;
  max-width: 90vw;
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  padding: 1.25rem;
  z-index: 60;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px) scale(0.98);
  transition: all var(--transition-fast);
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.header-menu-popover.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

.menu-popover-group-title {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
  padding-left: 0.25rem;
}

.menu-popover-links {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.menu-popover-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 0.625rem;
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.menu-popover-link:hover {
  background-color: var(--primary-subtle);
  color: var(--primary);
  text-decoration: none;
}

.menu-popover-link-icon {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-sm);
  background-color: var(--bg-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  flex-shrink: 0;
}

.menu-popover-badge {
  font-size: 0.6875rem;
  font-weight: 700;
  padding: 0.125rem 0.375rem;
  border-radius: var(--radius-full);
  background-color: var(--primary-subtle);
  color: var(--primary);
  margin-left: auto;
}

/* ==========================================================================
   HOMEPAGE SPECIFIC HERO & BENTO SECTIONS
   ========================================================================== */

.hero-section {
  padding-top: 3.5rem;
  padding-bottom: 4rem;
  background: radial-gradient(circle at 50% 10%, var(--primary-subtle), transparent 70%);
  text-align: center;
}

.hero-badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 0.875rem;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
  margin-bottom: 1.5rem;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-top: 2rem;
  margin-bottom: 2.5rem;
}

.btn-hero-primary {
  padding: 0.875rem 1.75rem;
  font-size: 1.05rem;
  font-weight: 700;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--primary), #4f46e5);
  color: #ffffff;
  box-shadow: 0 10px 20px -5px rgba(37, 99, 235, 0.4);
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  transition: all var(--transition-fast);
}

.btn-hero-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 24px -5px rgba(37, 99, 235, 0.5);
  color: #ffffff;
  text-decoration: none;
}

.btn-hero-secondary {
  padding: 0.875rem 1.5rem;
  font-size: 1.05rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  background-color: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-default);
  box-shadow: var(--shadow-sm);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: all var(--transition-fast);
}

.btn-hero-secondary:hover {
  background-color: var(--bg-muted);
  text-decoration: none;
  transform: translateY(-2px);
}

/* Live Tool Preview Card on Homepage */
.home-tool-preview-card {
  max-width: 960px;
  margin: 0 auto;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  text-align: left;
}

.home-tool-preview-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  background-color: var(--bg-muted);
  border-bottom: 1px solid var(--border-subtle);
}

.preview-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

@media (min-width: 768px) {
  .preview-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.preview-col {
  padding: 1.5rem;
  border-bottom: 1px solid var(--border-subtle);
}

@media (min-width: 768px) {
  .preview-col:first-child {
    border-right: 1px solid var(--border-subtle);
    border-bottom: none;
  }
  .preview-col:last-child {
    border-bottom: none;
  }
}

.preview-tag {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.preview-text {
  font-size: 1.1rem;
  line-height: 1.6;
  color: var(--text-primary);
  min-height: 90px;
}

.preview-footer {
  padding: 1rem 1.5rem;
  background-color: var(--bg-subtle);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

/* Bento Grid Features */
.bento-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-top: 2.5rem;
}

@media (min-width: 768px) {
  .bento-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .bento-card-large {
    grid-column: span 2;
  }
}

.bento-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

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

.bento-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background-color: var(--primary-subtle);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1.25rem;
}

.bento-card h3 {
  margin-top: 0;
  margin-bottom: 0.75rem;
  font-size: 1.3rem;
}

/* Suite of Tools Showcase Cards */
.tools-showcase-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-top: 2rem;
}

@media (min-width: 640px) {
  .tools-showcase-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .tools-showcase-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.tool-showcase-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: all var(--transition-normal);
  text-decoration: none;
  color: inherit;
}

.tool-showcase-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
  text-decoration: none;
}

.tool-showcase-card h3 {
  margin-top: 1rem;
  margin-bottom: 0.5rem;
  font-size: 1.25rem;
  color: var(--text-primary);
}

.tool-showcase-card p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.tool-card-action {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

/* Call to Action Full Banner */
.cta-banner-box {
  background: linear-gradient(135deg, var(--primary), #4338ca);
  color: #ffffff;
  border-radius: var(--radius-lg);
  padding: 3.5rem 2rem;
  text-align: center;
  box-shadow: var(--shadow-xl);
  margin: 3.5rem 0 1.5rem 0;
}

.cta-banner-box h2 {
  color: #ffffff;
  font-size: clamp(1.75rem, 3vw + 1rem, 2.5rem);
  margin-top: 0;
  margin-bottom: 1rem;
}

.cta-banner-box p {
  color: rgba(255, 255, 255, 0.9);
  max-width: 680px;
  margin: 0 auto 2rem auto;
  font-size: 1.15rem;
}

.cta-banner-btn {
  background-color: #ffffff;
  color: var(--primary);
  padding: 0.875rem 2rem;
  font-size: 1.05rem;
  font-weight: 700;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.cta-banner-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
  background-color: #f8fafc;
  color: #1d4ed8;
  text-decoration: none;
}

/* ==========================================================================
   MASTER MOBILE RESPONSIVENESS & TOUCH ADAPTATIONS
   ========================================================================== */

@media (max-width: 768px) {
  .section {
    padding-top: 2rem;
    padding-bottom: 2.5rem;
  }

  .container {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .hero-section {
    padding-top: 2rem;
    padding-bottom: 2.5rem;
  }

  .hero-badge-pill {
    font-size: 0.75rem;
    padding: 0.3rem 0.65rem;
    margin-bottom: 1rem;
  }

  .hero-cta-group {
    flex-direction: column;
    width: 100%;
    gap: 0.75rem;
    margin-top: 1.5rem;
    margin-bottom: 1.75rem;
  }

  .btn-hero-primary, .btn-hero-secondary {
    width: 100%;
    justify-content: center;
    min-height: 48px;
    font-size: 1rem;
    padding: 0.75rem 1.25rem;
  }

  .home-tool-preview-header {
    padding: 0.75rem 1rem;
  }

  .preview-col {
    padding: 1rem;
  }

  .preview-text {
    font-size: 1rem;
    min-height: 70px;
  }

  .preview-footer {
    padding: 0.75rem 1rem;
    flex-direction: column;
    align-items: stretch;
  }

  .preview-footer .btn {
    width: 100%;
    justify-content: center;
  }

  .bento-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
    margin-top: 1.5rem;
  }

  .bento-card {
    padding: 1.25rem;
  }

  .tools-showcase-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .tool-showcase-card {
    padding: 1.25rem;
  }

  .cta-banner-box {
    padding: 2rem 1.25rem;
    margin: 2.5rem 0 1rem 0;
  }

  .cta-banner-box h2 {
    font-size: 1.6rem;
  }

  .cta-banner-box p {
    font-size: 1rem;
    margin-bottom: 1.5rem;
  }

  .cta-banner-btn {
    width: 100%;
    justify-content: center;
    min-height: 48px;
  }

  .accordion-trigger {
    padding: 1rem 1.25rem;
    font-size: 1rem;
  }

  .accordion-body {
    padding: 0 1.25rem 1rem 1.25rem;
    font-size: 0.9375rem;
  }

  .site-footer {
    padding: 2.5rem 0 1.5rem 0;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: 0.75rem;
    padding-top: 1.5rem;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 15px;
  }

  .site-header {
    height: 56px;
  }

  .brand-logo span {
    font-size: 1.05rem;
  }

  .brand-icon {
    width: 32px;
    height: 32px;
    font-size: 0.875rem;
  }

  .btn-icon {
    width: 38px;
    height: 38px;
    min-width: 38px;
    min-height: 38px;
  }

  .header-actions {
    gap: 0.35rem;
  }

  .panel-meta {
    font-size: 0.75rem;
    gap: 0.5rem;
  }

  .action-btn {
    width: 38px;
    height: 38px;
    min-width: 38px;
    min-height: 38px;
  }

  .history-item {
    padding: 0.75rem 1rem;
  }

  .comparison-table th, .comparison-table td {
    padding: 0.625rem 0.75rem;
    font-size: 0.8125rem;
  }
}