/* ==========================================================================
   Shree Lipi & Unicode Devanagari Converter - CSS Design System
   Optimized for Static Site Hosting (Cloudflare Pages)
   ========================================================================== */

:root {
  /* Light Palette */
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --bg-input: #f1f5f9;
  --border-color: #e2e8f0;
  --border-focus: #4f46e5;
  
  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-heading: #1e293b;
  
  --accent-primary: #4f46e5;
  --accent-primary-hover: #4338ca;
  --accent-secondary: #06b6d4;
  --accent-light: #e0e7ff;
  --accent-text: #3730a3;

  --success-bg: #dcfce7;
  --success-text: #166534;
  --warning-bg: #fef3c7;
  --warning-text: #92400e;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-glow: 0 0 20px rgba(79, 70, 229, 0.15);

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
}

[data-theme="dark"] {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-card: #1e293b;
  --bg-input: #0f172a;
  --border-color: #334155;
  --border-focus: #6366f1;

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-heading: #f1f5f9;

  --accent-primary: #6366f1;
  --accent-primary-hover: #4f46e5;
  --accent-secondary: #38bdf8;
  --accent-light: rgba(99, 102, 241, 0.2);
  --accent-text: #c7d2fe;

  --success-bg: rgba(22, 101, 52, 0.3);
  --success-text: #86efac;
  --warning-bg: rgba(146, 64, 14, 0.3);
  --warning-text: #fde047;

  --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);
  --shadow-glow: 0 0 25px rgba(99, 102, 241, 0.25);
}

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

body {
  font-family: 'Outfit', 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* SVG Icon Helper */
svg.icon {
  display: inline-block;
  vertical-align: middle;
  flex-shrink: 0;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* Navbar */
.site-header {
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  position: relative;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-heading);
  font-weight: 700;
  font-size: 1.25rem;
}

.brand-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: #fff;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 800;
  box-shadow: var(--shadow-sm);
}

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

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1rem;
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.95rem;
  transition: all var(--transition-fast);
}

.nav-link:hover {
  color: var(--text-heading);
  background-color: var(--accent-light);
}

.nav-link.active {
  color: var(--accent-primary);
  background-color: var(--accent-light);
  font-weight: 600;
}

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

.theme-toggle {
  background: none;
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  font-weight: 500;
  transition: all var(--transition-fast);
}

.theme-toggle:hover {
  background-color: var(--bg-input);
  border-color: var(--border-focus);
}

/* Mobile Hamburger Toggle Button */
.mobile-menu-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.5rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.mobile-menu-toggle:hover {
  background-color: var(--bg-input);
  border-color: var(--border-focus);
}

/* Responsive Navigation Styles (≤850px) */
@media (max-width: 850px) {
  .mobile-menu-toggle {
    display: inline-flex;
  }

  .main-nav {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    padding: 1rem 1.5rem;
    display: none;
    animation: slideDown 0.25s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    z-index: 99;
  }

  .main-nav.is-open {
    display: block;
  }

  .nav-links {
    flex-direction: column;
    align-items: stretch;
    gap: 0.5rem;
  }

  .nav-link {
    width: 100%;
    padding: 0.75rem 1rem;
    justify-content: flex-start;
    font-size: 1rem;
  }

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

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

/* Page Header / Hero Banner */
.hero-banner {
  padding: 2.5rem 0 1.5rem;
  text-align: center;
}

.badge-tag {
  display: inline-block;
  padding: 0.35rem 0.9rem;
  background-color: var(--accent-light);
  color: var(--accent-primary);
  border-radius: 9999px;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  margin-bottom: 0.75rem;
  text-transform: uppercase;
}

.hero-banner h1 {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--text-heading);
  margin-bottom: 0.5rem;
}

.hero-banner p {
  color: var(--text-muted);
  font-size: 1.1rem;
  max-width: 680px;
  margin: 0 auto;
}

/* Converter Workspace Grid */
.converter-section {
  padding-bottom: 3rem;
}

.workspace-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  overflow: hidden;
  padding: 1.5rem;
}

.grid-workspace {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  align-items: stretch;
}

.box-container.input-box-container {
  grid-column: 1;
  grid-row: 1;
}

.box-container.output-box-container {
  grid-column: 2;
  grid-row: 1;
}

/* Control Bar (Convert Action) */
.action-control-bar {
  grid-column: 1 / -1;
  grid-row: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 0.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-color);
  flex-wrap: wrap;
  gap: 1rem;
}

/* Tablet & Mobile (≤900px): Convert Button Placed BETWEEN Input and Output Boxes */
@media (max-width: 900px) {
  .grid-workspace {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }

  .box-container.input-box-container {
    grid-column: 1;
    grid-row: 1;
  }

  .action-control-bar {
    grid-column: 1;
    grid-row: 2;
    margin-top: 0;
    padding-top: 0.75rem;
    padding-bottom: 0.75rem;
    border-top: 1px dashed var(--border-color);
    border-bottom: 1px dashed var(--border-color);
    justify-content: center;
    flex-direction: column;
    text-align: center;
  }

  .action-control-bar .btn-primary {
    width: 100%;
    justify-content: center;
    padding: 0.85rem 1.5rem;
  }

  .box-container.output-box-container {
    grid-column: 1;
    grid-row: 3;
  }
}

.box-container {
  display: flex;
  flex-direction: column;
  height: 100%;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  position: relative;
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.box-container:focus-within {
  border-color: var(--border-focus);
}

/* Header layout: Title at TOP, Actions directly BELOW it */
.box-header {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 0.85rem 1.25rem;
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  gap: 0.75rem;
}

.box-title {
  width: 100%;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-heading);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.box-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  width: 100%;
}

.btn-tool {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.4rem 0.8rem;
  font-size: 0.85rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: all var(--transition-fast);
}

.btn-tool:hover {
  border-color: var(--border-focus);
  color: var(--accent-primary);
  background-color: var(--accent-light);
}

/* Phonetic Toggle Button */
.btn-toggle-phonetic {
  background-color: var(--accent-light);
  color: var(--accent-primary);
  border: 1px solid var(--accent-primary);
  padding: 0.4rem 0.8rem;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: all var(--transition-fast);
}

.btn-toggle-phonetic.is-off {
  background-color: var(--bg-card);
  color: var(--text-muted);
  border-color: var(--border-color);
}

.btn-toggle-phonetic strong {
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
  background-color: var(--accent-primary);
  color: #fff;
  font-size: 0.75rem;
}

.btn-toggle-phonetic.is-off strong {
  background-color: var(--text-muted);
}

/* Scrollable & Vertically Resizable Textarea Field (Comfortable 400px+ height) */
.textarea-field {
  flex: 1;
  width: 100%;
  min-height: 400px;
  height: 400px;
  max-height: 800px;
  padding: 1.25rem;
  background-color: transparent;
  border: none;
  resize: vertical;
  color: var(--text-main);
  font-size: 1.15rem;
  line-height: 1.7;
  font-family: inherit;
  outline: none;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border-color) transparent;
}

.textarea-field::-webkit-scrollbar {
  width: 6px;
}

.textarea-field::-webkit-scrollbar-thumb {
  background-color: var(--border-color);
  border-radius: 4px;
}

.textarea-field::-webkit-scrollbar-thumb:hover {
  background-color: var(--text-muted);
}

.textarea-field::placeholder {
  color: var(--text-muted);
  opacity: 0.7;
}

/* Live Preview Panel (Low Opacity Professional Preview Box) */
.preview-panel {
  margin: 0 1.25rem 1rem;
  padding: 0.85rem 1.1rem;
  background-color: var(--bg-secondary);
  border: 1px dashed var(--border-color);
  border-radius: var(--radius-md);
  opacity: 0.85;
  transition: opacity var(--transition-fast), border-color var(--transition-fast);
}

.preview-panel:hover {
  opacity: 1;
  border-color: var(--accent-primary);
}

.preview-header {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  margin-bottom: 0.5rem;
}

.preview-badge {
  background-color: var(--accent-light);
  color: var(--accent-primary);
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.preview-content {
  font-family: 'Tiro Devanagari Marathi', 'Outfit', sans-serif;
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--text-heading);
  min-height: 2.2rem;
  max-height: 140px;
  overflow-y: auto;
  word-break: break-word;
  opacity: 0.9;
}

.box-footer {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 1.25rem;
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  font-size: 0.85rem;
  color: var(--text-muted);
}

.box-footer-label {
  display: inline;
}

@media (max-width: 640px) {
  .box-footer-label {
    display: none !important;
  }
  .box-footer {
    justify-content: flex-end;
  }
}

.counter-badge {
  display: flex;
  gap: 1rem;
}

/* Phonetic Word Suggestions Popover Panel */
.suggestions-popover {
  position: absolute;
  bottom: 48px;
  left: 1.25rem;
  right: 1.25rem;
  background-color: var(--bg-card);
  border: 1px solid var(--border-focus);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg), 0 0 15px rgba(79, 70, 229, 0.2);
  z-index: 50;
  overflow: hidden;
  padding: 0.5rem;
  animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

.suggestions-popover-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.35rem 0.6rem 0.5rem;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
}

.suggestions-hint {
  font-size: 0.75rem;
  color: var(--accent-primary);
  background-color: var(--accent-light);
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
}

.suggestions-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  padding-top: 0.5rem;
}

.suggestion-item {
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-sm);
  font-size: 1.05rem;
  font-weight: 500;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  user-select: none;
  transition: all var(--transition-fast);
}

.suggestion-item:hover, .suggestion-item.is-selected {
  background-color: var(--accent-primary);
  border-color: var(--accent-primary);
  color: #ffffff;
  transform: translateY(-1px);
}

.suggestion-item .item-num {
  font-size: 0.75rem;
  opacity: 0.75;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-primary-hover));
  color: #ffffff;
  border: none;
  padding: 0.85rem 2rem;
  font-size: 1.05rem;
  font-weight: 700;
  border-radius: var(--radius-md);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-fast);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  filter: brightness(1.05);
}

.status-bar {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.status-bar.is-success {
  color: #10b981;
}

.status-bar.is-warning {
  color: #f59e0b;
}

/* Information & Guide Cards */
.guide-section {
  padding: 2rem 0 4rem;
}

.section-title {
  text-align: center;
  margin-bottom: 2rem;
}

.section-title h2 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-heading);
}

.section-title p {
  color: var(--text-muted);
  font-size: 1rem;
}

.grid-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

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

.info-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.card-number {
  width: 36px;
  height: 36px;
  background-color: var(--accent-light);
  color: var(--accent-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
  margin-bottom: 1rem;
}

.info-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-heading);
  margin-bottom: 0.5rem;
}

.info-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* FAQ Accordions */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

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

.faq-summary {
  padding: 1.1rem 1.5rem;
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--text-heading);
  cursor: pointer;
  user-select: none;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.faq-summary::after {
  content: "＋";
  font-size: 1.2rem;
  color: var(--accent-primary);
  transition: transform var(--transition-fast);
}

.faq-item[open] .faq-summary::after {
  content: "－";
}

.faq-answer {
  padding: 0 1.5rem 1.25rem;
  color: var(--text-muted);
  font-size: 0.98rem;
  line-height: 1.65;
  border-top: 1px dashed var(--border-color);
  padding-top: 1rem;
}

/* Footer */
.site-footer {
  margin-top: auto;
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 2.5rem 0;
  color: var(--text-muted);
  font-size: 0.9rem;
}

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

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-link {
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.toast {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.85rem 1.25rem;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-size: 0.95rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  animation: slideIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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