/* ==========================================================================
   AI SPEECH TO TEXT - FULLY RESPONSIVE & MOBILE-FIRST DESIGN SYSTEM
   Core Web Vitals & Google Mobile-Friendly Optimized (Zero External CSS Frameworks)
   ========================================================================== */

:root {
  /* Color Palette - Light Mode */
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  --bg-card: #ffffff;
  --bg-card-hover: #f8fafc;
  --bg-input: #ffffff;
  --bg-accent-subtle: #eff6ff;
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-inverse: #ffffff;
  
  --brand-primary: #2563eb;
  --brand-primary-hover: #1d4ed8;
  --brand-primary-light: #dbeafe;
  --brand-secondary: #0d9488;
  --brand-gradient: linear-gradient(135deg, #2563eb 0%, #0d9488 100%);
  
  --success: #16a34a;
  --success-light: #dcfce7;
  --warning: #d97706;
  --warning-light: #fef3c7;
  --danger: #ef4444;
  --danger-light: #fee2e2;
  
  --border-color: #e2e8f0;
  --border-focus: #3b82f6;
  --ring-color: rgba(59, 130, 246, 0.25);
  
  /* Typography */
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  
  /* Spacing & Sizing */
  --container-max: 1200px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-full: 9999px;
  
  /* Shadows */
  --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, 0.05);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
}

[data-theme="dark"] {
  --bg-primary: #090d16;
  --bg-secondary: #111827;
  --bg-tertiary: #1f2937;
  --bg-card: #111827;
  --bg-card-hover: #1e293b;
  --bg-input: #1f2937;
  --bg-accent-subtle: rgba(37, 99, 235, 0.15);
  
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverse: #0f172a;
  
  --brand-primary: #3b82f6;
  --brand-primary-hover: #60a5fa;
  --brand-primary-light: rgba(59, 130, 246, 0.2);
  --brand-secondary: #14b8a6;
  --brand-gradient: linear-gradient(135deg, #3b82f6 0%, #14b8a6 100%);
  
  --border-color: #1f2937;
  --border-focus: #60a5fa;
  --ring-color: rgba(96, 165, 250, 0.35);
  
  --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);
}

/* ==========================================================================
   CSS Reset & Base Rules (Mobile-First)
   ========================================================================== */

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

html {
  font-size: 16px;
  line-height: 1.5;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  width: 100%;
  max-width: 100vw;
  -webkit-tap-highlight-color: transparent;
}

img, svg, canvas, video {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
  touch-action: manipulation;
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
  touch-action: manipulation;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

/* Prevent iOS input zoom by enforcing 16px min size */
input, select, textarea {
  font-size: 1rem;
}

:focus-visible {
  outline: 2px solid var(--border-focus);
  outline-offset: 2px;
}

/* ==========================================================================
   Layout Containers (Fluid & Safe-Area Aware)
   ========================================================================== */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1rem;
  padding-right: 1rem;
  padding-left: max(1rem, env(safe-area-inset-left));
  padding-right: max(1rem, env(safe-area-inset-right));
}

@media (min-width: 640px) {
  .container {
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }
}

@media (min-width: 1024px) {
  .container {
    padding-left: 2rem;
    padding-right: 2rem;
  }
}

.container-narrow {
  max-width: 860px;
}

.section {
  padding-top: 3rem;
  padding-bottom: 3rem;
}

@media (min-width: 768px) {
  .section {
    padding-top: 4.5rem;
    padding-bottom: 4.5rem;
  }
}

.section-alt {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

/* ==========================================================================
   Header & Responsive Navigation
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: rgba(248, 250, 252, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
  padding-top: env(safe-area-inset-top);
}

[data-theme="dark"] .site-header {
  background-color: rgba(9, 13, 22, 0.95);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
  gap: 0.75rem;
}

@media (min-width: 768px) {
  .header-inner {
    height: 4.5rem;
    gap: 1.25rem;
  }
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 800;
  font-size: 1.125rem;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  text-decoration: none;
  flex-shrink: 0;
  min-height: 44px;
}

@media (min-width: 640px) {
  .brand-logo {
    font-size: 1.25rem;
    gap: 0.75rem;
  }
}

.brand-logo:hover {
  color: var(--brand-primary);
}

.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.2rem;
  height: 2.2rem;
  background: var(--brand-gradient);
  color: #ffffff;
  border-radius: var(--radius-md);
  box-shadow: 0 3px 10px rgba(37, 99, 235, 0.35);
  transition: transform var(--transition-fast);
  flex-shrink: 0;
}

.brand-logo:hover .logo-icon {
  transform: scale(1.05);
}

/* Desktop Navigation Menu */
.desktop-nav {
  display: none;
  margin-left: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  list-style: none;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 0.45rem 0.75rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  min-height: 40px;
}

.nav-link:hover {
  color: var(--brand-primary);
  background-color: var(--bg-accent-subtle);
}

.nav-link.active {
  color: var(--brand-primary);
  background-color: var(--bg-accent-subtle);
  font-weight: 700;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

@media (min-width: 640px) {
  .header-actions {
    gap: 0.65rem;
  }
}

.nav-cta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.5rem 1.15rem;
  background: var(--brand-gradient);
  color: #ffffff !important;
  font-size: 0.875rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  box-shadow: 0 2px 10px rgba(37, 99, 235, 0.3);
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
  min-height: 40px;
}

.nav-cta-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.45);
  filter: brightness(1.05);
}

.theme-toggle-btn,
.mobile-menu-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  min-width: 44px;
  min-height: 44px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.theme-toggle-btn:hover,
.mobile-menu-btn:hover {
  background-color: var(--bg-tertiary);
  border-color: var(--brand-primary);
}

/* Mobile Navigation Drawer */
.mobile-nav-drawer {
  display: none;
  position: fixed;
  top: 4rem;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--bg-primary);
  padding: 1.25rem 1rem 2rem;
  border-top: 1px solid var(--border-color);
  z-index: 49;
  flex-direction: column;
  gap: 0.6rem;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  box-shadow: var(--shadow-xl);
}

@media (min-width: 768px) {
  .mobile-nav-drawer {
    top: 4.5rem;
  }
}

.mobile-nav-drawer.open {
  display: flex;
  animation: fadeInDrawer 0.2s ease-out;
}

@keyframes fadeInDrawer {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

.mobile-nav-drawer .nav-link {
  font-size: 1.05rem;
  padding: 0.85rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background-color: var(--bg-secondary);
  min-height: 48px;
  color: var(--text-primary);
}

.mobile-nav-drawer .nav-link:active {
  background-color: var(--bg-accent-subtle);
  border-color: var(--brand-primary);
}

.mobile-nav-drawer .nav-cta-btn {
  justify-content: center;
  padding: 0.85rem 1.5rem;
  font-size: 1rem;
  margin-top: 0.5rem;
  min-height: 48px;
  width: 100%;
}

@media (min-width: 960px) {
  .desktop-nav {
    display: flex;
  }
  .mobile-menu-btn {
    display: none;
  }
  .mobile-nav-drawer {
    display: none !important;
  }
}

/* ==========================================================================
   Hero & Header Banners (Responsive Mobile-First)
   ========================================================================== */

.hero-section {
  padding: 2rem 0 1.5rem;
  text-align: center;
}

@media (min-width: 768px) {
  .hero-section {
    padding: 3.5rem 0 2.5rem;
  }
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-full);
  background-color: var(--brand-primary-light);
  color: var(--brand-primary);
  font-size: 0.8125rem;
  font-weight: 600;
  margin-bottom: 1rem;
  border: 1px solid rgba(37, 99, 235, 0.2);
  max-width: 100%;
}

.badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--success);
  box-shadow: 0 0 0 2px var(--success-light);
  animation: pulse-dot 2s infinite;
  flex-shrink: 0;
}

@keyframes pulse-dot {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.2); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

.hero-title {
  font-size: 1.85rem;
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: 0.85rem;
  word-break: break-word;
}

@media (min-width: 480px) {
  .hero-title {
    font-size: 2.25rem;
  }
}

@media (min-width: 768px) {
  .hero-title {
    font-size: 3rem;
  }
}

@media (min-width: 1024px) {
  .hero-title {
    font-size: 3.25rem;
  }
}

.hero-title .text-gradient {
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-secondary);
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: 1.75rem;
  padding-left: 0.5rem;
  padding-right: 0.5rem;
}

@media (min-width: 768px) {
  .hero-desc {
    font-size: 1.125rem;
    margin-bottom: 2.25rem;
  }
}

/* ==========================================================================
   Tool Application Studio (Core Mobile-Friendly Component)
   ========================================================================== */

.app-studio-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  margin-bottom: 2.5rem;
  transition: border-color var(--transition-normal);
  width: 100%;
}

@media (min-width: 768px) {
  .app-studio-card {
    border-radius: var(--radius-xl);
    margin-bottom: 3.5rem;
  }
}

/* Studio Mode Tab Bar */
.studio-tabs,
.studio-tab-bar {
  display: flex;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-tertiary);
  width: 100%;
}

.studio-tab-btn,
.studio-tab {
  flex: 1 1 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.85rem 0.5rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  background-color: transparent;
  border: none;
  border-bottom: 3px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  min-height: 48px;
  text-align: center;
}

@media (min-width: 640px) {
  .studio-tab-btn,
  .studio-tab {
    gap: 0.5rem;
    padding: 0.95rem 1rem;
    font-size: 0.9375rem;
  }
}

.studio-tab-btn:hover,
.studio-tab:hover {
  color: var(--text-primary);
  background-color: var(--bg-card);
}

.studio-tab-btn.active,
.studio-tab.active {
  color: var(--brand-primary);
  background-color: var(--bg-card);
  border-bottom-color: var(--brand-primary);
  font-weight: 700;
}

/* Controls Toolbar (Top Bar inside Tool) */
.controls-toolbar,
.studio-toolbar {
  display: flex;
  flex-direction: column;
  padding: 0.85rem 1rem;
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  gap: 0.75rem;
}

@media (min-width: 640px) {
  .controls-toolbar,
  .studio-toolbar {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.25rem;
  }
}

.control-group,
.toolbar-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem;
  width: 100%;
}

@media (min-width: 640px) {
  .control-group,
  .toolbar-group {
    width: auto;
  }
}

.control-label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-secondary);
  white-space: nowrap;
}

.tool-select-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  width: 100%;
}

@media (min-width: 640px) {
  .tool-select-wrapper {
    width: auto;
  }
}

.tool-select,
.form-select {
  appearance: none;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  padding: 0.6rem 2.25rem 0.6rem 0.85rem;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  width: 100%;
  min-height: 44px;
}

@media (min-width: 640px) {
  .tool-select,
  .form-select {
    width: auto;
    min-width: 180px;
    font-size: 0.875rem;
    padding: 0.5rem 2.25rem 0.5rem 0.85rem;
  }
}

.tool-select:focus,
.form-select:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--ring-color);
}

.select-arrow {
  position: absolute;
  right: 0.75rem;
  pointer-events: none;
  color: var(--text-muted);
}

.switch-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  user-select: none;
  min-height: 44px;
}

.switch-checkbox,
.form-checkbox {
  accent-color: var(--brand-primary);
  width: 1.15rem;
  height: 1.15rem;
  cursor: pointer;
}

/* Tool Main Area Grid (Editor + Sidebar) */
.studio-main-grid {
  display: grid;
  grid-template-columns: 1fr;
  min-height: 380px;
}

@media (min-width: 960px) {
  .studio-main-grid {
    grid-template-columns: 1fr 340px;
  }
}

/* Editor Pane (Left Side) */
.studio-editor-pane {
  display: flex;
  flex-direction: column;
  padding: 1rem;
  border-bottom: 1px solid var(--border-color);
}

@media (min-width: 640px) {
  .studio-editor-pane {
    padding: 1.5rem;
  }
}

@media (min-width: 960px) {
  .studio-editor-pane {
    border-bottom: none;
    border-right: 1px solid var(--border-color);
  }
}

.transcript-header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.65rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.live-indicator {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-muted);
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  background-color: var(--bg-tertiary);
}

.live-indicator.recording {
  color: var(--danger);
  background-color: var(--danger-light);
}

.live-indicator.recording .indicator-dot {
  background-color: var(--danger);
  animation: pulse-record 1.2s infinite;
}

.indicator-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--text-muted);
  flex-shrink: 0;
}

@keyframes pulse-record {
  0% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.4); opacity: 0.6; }
  100% { transform: scale(1); opacity: 1; }
}

.transcript-textarea {
  width: 100%;
  flex: 1;
  min-height: 200px;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 0.85rem;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-primary);
  resize: vertical;
  transition: border-color var(--transition-fast);
}

@media (min-width: 640px) {
  .transcript-textarea {
    padding: 1rem;
    font-size: 1.0625rem;
    line-height: 1.7;
    min-height: 250px;
  }
}

.transcript-textarea:focus {
  outline: none;
  border-color: var(--border-focus);
}

.interim-preview-box {
  margin-top: 0.75rem;
  padding: 0.65rem 0.85rem;
  background-color: var(--bg-tertiary);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  color: var(--text-muted);
  font-style: italic;
  min-height: 2.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  word-break: break-word;
}

@media (min-width: 640px) {
  .interim-preview-box {
    font-size: 0.9375rem;
  }
}

/* Quick Punctuation Bar (Touch Friendly) */
.quick-punct-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  margin-top: 0.75rem;
}

.punct-label {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
  margin-right: 0.2rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  width: 100%;
}

@media (min-width: 480px) {
  .punct-label {
    width: auto;
    font-size: 0.8125rem;
  }
}

.punct-btn {
  padding: 0.45rem 0.75rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  min-height: 38px;
  min-width: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.punct-btn:hover,
.punct-btn:active {
  background-color: var(--bg-accent-subtle);
  color: var(--brand-primary);
  border-color: var(--brand-primary);
}

/* Studio Sidebar / Controls Pane (Right Side on Desktop, Bottom on Mobile) */
.studio-controls-pane {
  background-color: var(--bg-secondary);
  padding: 1.25rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

@media (min-width: 640px) {
  .studio-controls-pane {
    padding: 1.5rem;
    gap: 1.5rem;
  }
}

.mic-action-box {
  text-align: center;
  padding: 1.25rem 1rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
}

.mic-big-button {
  width: 4.75rem;
  height: 4.75rem;
  border-radius: 50%;
  background: var(--brand-gradient);
  color: #ffffff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
  margin-bottom: 0.75rem;
  position: relative;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  cursor: pointer;
}

@media (min-width: 640px) {
  .mic-big-button {
    width: 5.25rem;
    height: 5.25rem;
  }
}

.mic-big-button:hover {
  transform: scale(1.04);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.45);
}

.mic-big-button.active {
  background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
  box-shadow: 0 0 0 8px rgba(239, 68, 68, 0.2);
  animation: ripple-mic 1.5s infinite;
}

@keyframes ripple-mic {
  0% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.4); }
  70% { box-shadow: 0 0 0 16px rgba(239, 68, 68, 0); }
  100% { box-shadow: 0 0 0 0 rgba(239, 68, 68, 0); }
}

.mic-status-text {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.mic-timer-text {
  font-size: 0.8125rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
}

/* Audio Waveform Canvas Container */
.waveform-container {
  height: 52px;
  width: 100%;
  background-color: var(--bg-tertiary);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-top: 0.75rem;
}

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

/* Stats Matrix (Responsive Grid) */
.stats-matrix {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.65rem;
}

.stat-card {
  padding: 0.75rem 0.5rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  text-align: center;
}

.stat-value {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.stat-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 0.2rem;
}

/* Action Buttons (Full-Width Touch Targets on Mobile) */
.actions-stack {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.5rem;
}

@media (min-width: 480px) and (max-width: 959px) {
  .actions-stack {
    grid-template-columns: repeat(2, 1fr);
  }
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
  font-weight: 600;
  transition: all var(--transition-fast);
  white-space: nowrap;
  min-height: 44px;
  width: 100%;
}

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

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

.btn-outline {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
}

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

.btn-danger-outline {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--danger);
}

.btn-danger-outline:hover,
.btn-danger-outline:active {
  background-color: var(--danger-light);
  border-color: var(--danger);
}

.btn-sm {
  padding: 0.4rem 0.85rem;
  font-size: 0.8125rem;
  min-height: 38px;
}

/* File Transcriber Dropzone View */
.file-transcriber-pane {
  display: none;
  padding: 1.5rem 1rem;
}

@media (min-width: 640px) {
  .file-transcriber-pane {
    padding: 2.25rem 1.5rem;
  }
}

.dropzone-box {
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem 1rem;
  text-align: center;
  background-color: var(--bg-secondary);
  cursor: pointer;
  transition: all var(--transition-normal);
  width: 100%;
}

@media (min-width: 640px) {
  .dropzone-box {
    padding: 2.5rem 1.5rem;
  }
}

.dropzone-box:hover,
.dropzone-box.drag-over {
  border-color: var(--brand-primary);
  background-color: var(--bg-accent-subtle);
}

.dropzone-icon {
  width: 3rem;
  height: 3rem;
  margin: 0 auto 0.75rem;
  color: var(--brand-primary);
}

@media (min-width: 640px) {
  .dropzone-icon {
    width: 3.5rem;
    height: 3.5rem;
    margin-bottom: 1rem;
  }
}

.dropzone-title {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.35rem;
}

.dropzone-subtitle {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
}

.file-progress-bar {
  width: 100%;
  height: 8px;
  background-color: var(--border-color);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin: 1.25rem 0;
  display: none;
}

.file-progress-fill {
  height: 100%;
  width: 0%;
  background: var(--brand-gradient);
  transition: width 0.3s ease;
}

/* ==========================================================================
   Content Grid & Features (Mobile-First Stacking)
   ========================================================================== */

.content-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 2.5rem;
}

@media (min-width: 768px) {
  .content-header {
    margin-bottom: 3.5rem;
  }
}

.content-header h2 {
  font-size: 1.65rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 0.65rem;
  word-break: break-word;
}

@media (min-width: 640px) {
  .content-header h2 {
    font-size: 2rem;
    margin-bottom: 0.85rem;
  }
}

.content-header p {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

@media (min-width: 640px) {
  .content-header p {
    font-size: 1.0625rem;
  }
}

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

@media (min-width: 640px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }
}

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

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

@media (min-width: 640px) {
  .feature-card {
    padding: 1.75rem;
  }
}

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

.feature-icon-wrapper {
  width: 2.75rem;
  height: 2.75rem;
  border-radius: var(--radius-md);
  background-color: var(--brand-primary-light);
  color: var(--brand-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
}

.feature-card h3 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.feature-card p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

@media (min-width: 640px) {
  .feature-card h3 {
    font-size: 1.2rem;
  }
  .feature-card p {
    font-size: 0.9375rem;
  }
}

/* ==========================================================================
   4-Step Workflow Section
   ========================================================================== */

.workflow-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  position: relative;
}

@media (min-width: 480px) and (max-width: 767px) {
  .workflow-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 768px) {
  .workflow-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
  }
}

.step-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem 1.25rem;
  text-align: center;
  position: relative;
}

.step-number {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 50%;
  background: var(--brand-gradient);
  color: #ffffff;
  font-size: 1rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
}

.step-card h3 {
  font-size: 1.0625rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

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

/* ==========================================================================
   Comparison Table (Responsive Horizontal Scroll)
   ========================================================================== */

.table-responsive {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  background-color: var(--bg-card);
  box-shadow: var(--shadow-sm);
  margin-bottom: 1.5rem;
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  min-width: 540px;
}

.comparison-table th,
.comparison-table td {
  padding: 0.875rem 1rem;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.875rem;
}

@media (min-width: 640px) {
  .comparison-table th,
  .comparison-table td {
    padding: 1.125rem 1.25rem;
    font-size: 0.9375rem;
  }
}

.comparison-table th {
  background-color: var(--bg-secondary);
  font-weight: 700;
  color: var(--text-primary);
  position: sticky;
  top: 0;
}

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

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

/* ==========================================================================
   Use Cases Bento Grid
   ========================================================================== */

.use-cases-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

@media (min-width: 640px) {
  .use-cases-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }
}

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

.use-case-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
}

.use-case-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--brand-secondary);
  margin-bottom: 0.5rem;
}

.use-case-card h3 {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.use-case-card p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ==========================================================================
   FAQ Accordion (Accessible Touch Targets)
   ========================================================================== */

.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

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

.faq-item:hover {
  border-color: var(--border-focus);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-primary);
  text-align: left;
  min-height: 48px;
  gap: 0.75rem;
}

@media (min-width: 640px) {
  .faq-question {
    padding: 1.25rem 1.5rem;
    font-size: 1.0625rem;
  }
}

.faq-icon {
  transition: transform var(--transition-fast);
  color: var(--text-muted);
  flex-shrink: 0;
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
  color: var(--brand-primary);
}

.faq-answer {
  display: none;
  padding: 0 1.25rem 1.25rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

@media (min-width: 640px) {
  .faq-answer {
    padding: 0 1.5rem 1.25rem;
    font-size: 0.9375rem;
    line-height: 1.7;
  }
}

.faq-item.active .faq-answer {
  display: block;
}

/* ==========================================================================
   Deep Educational Content Prose Layout
   ========================================================================== */

.prose-block {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text-secondary);
  word-break: break-word;
}

@media (min-width: 640px) {
  .prose-block {
    font-size: 1.0625rem;
    line-height: 1.8;
  }
}

.prose-block h2 {
  font-size: 1.45rem;
  font-weight: 800;
  color: var(--text-primary);
  margin: 1.75rem 0 0.85rem;
  letter-spacing: -0.02em;
}

@media (min-width: 640px) {
  .prose-block h2 {
    font-size: 1.75rem;
    margin: 2rem 0 1rem;
  }
}

.prose-block h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 1.25rem 0 0.65rem;
}

@media (min-width: 640px) {
  .prose-block h3 {
    font-size: 1.35rem;
    margin: 1.5rem 0 0.75rem;
  }
}

.prose-block p {
  margin-bottom: 1.25rem;
}

.prose-block ul,
.prose-block ol {
  margin-bottom: 1.5rem;
  padding-left: 1.25rem;
}

@media (min-width: 640px) {
  .prose-block ul,
  .prose-block ol {
    padding-left: 1.75rem;
  }
}

.prose-block li {
  margin-bottom: 0.5rem;
}

.callout-box {
  padding: 1rem 1.25rem;
  border-radius: var(--radius-md);
  background-color: var(--bg-accent-subtle);
  border-left: 4px solid var(--brand-primary);
  margin: 1.5rem 0;
}

@media (min-width: 640px) {
  .callout-box {
    padding: 1.25rem 1.5rem;
    margin: 1.75rem 0;
  }
}

.callout-box h4 {
  color: var(--brand-primary);
  font-weight: 700;
  margin-bottom: 0.35rem;
}

.callout-box p {
  margin-bottom: 0;
  font-size: 0.875rem;
}

@media (min-width: 640px) {
  .callout-box p {
    font-size: 0.9375rem;
  }
}

/* ==========================================================================
   Blog & Article Cards
   ========================================================================== */

.blog-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

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

@media (min-width: 1024px) {
  .blog-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
  }
}

.blog-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
}

.blog-card-img {
  width: 100%;
  height: 160px;
  background: var(--brand-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
}

@media (min-width: 640px) {
  .blog-card-img {
    height: 180px;
  }
}

.blog-card-body {
  padding: 1.25rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

@media (min-width: 640px) {
  .blog-card-body {
    padding: 1.5rem;
  }
}

.blog-meta {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.blog-card-title {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.65rem;
  line-height: 1.4;
}

.blog-card-title:hover {
  color: var(--brand-primary);
}

.blog-card-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
  flex: 1;
  line-height: 1.5;
}

/* ==========================================================================
   Forms & Inputs (Contact Page)
   ========================================================================== */

.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.4rem;
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background-color: var(--bg-input);
  color: var(--text-primary);
  font-size: 1rem;
  transition: all var(--transition-fast);
  min-height: 44px;
}

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

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 3rem 0 2rem;
  margin-top: auto;
  padding-bottom: max(2rem, env(safe-area-inset-bottom));
}

@media (min-width: 768px) {
  .site-footer {
    padding: 4rem 0 2.5rem;
  }
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-bottom: 2.5rem;
}

@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;
    gap: 2.5rem;
    margin-bottom: 3.5rem;
  }
}

.footer-col-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-top: 0.75rem;
  max-width: 320px;
  line-height: 1.6;
}

.footer-heading {
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.footer-link {
  font-size: 0.875rem;
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  min-height: 32px;
}

.footer-link:hover {
  color: var(--brand-primary);
}

.footer-bottom {
  padding-top: 1.5rem;
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8125rem;
  color: var(--text-muted);
  text-align: center;
}

@media (min-width: 640px) {
  .footer-bottom {
    flex-direction: row;
    padding-top: 2rem;
    font-size: 0.875rem;
    text-align: left;
  }
}

/* ==========================================================================
   Toast Notification & Floating Utilities (Mobile Responsive)
   ========================================================================== */

.toast-container {
  position: fixed;
  bottom: 1rem;
  left: 1rem;
  right: 1rem;
  z-index: 100;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  pointer-events: none;
  max-width: 480px;
  margin: 0 auto;
}

@media (min-width: 640px) {
  .toast-container {
    bottom: 1.5rem;
    right: 1.5rem;
    left: auto;
    width: auto;
  }
}

.toast {
  padding: 0.75rem 1.15rem;
  background-color: var(--text-primary);
  color: var(--bg-primary);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  animation: slide-up 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  pointer-events: auto;
  width: 100%;
}

@keyframes slide-up {
  from { transform: translateY(100%); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

/* Breadcrumb Component */
.breadcrumbs {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}

@media (min-width: 640px) {
  .breadcrumbs {
    font-size: 0.875rem;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
  }
}

.breadcrumbs a {
  color: var(--text-muted);
  min-height: 32px;
  display: inline-flex;
  align-items: center;
}

.breadcrumbs a:hover {
  color: var(--brand-primary);
}

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