:root {
  --primary: #4F46E5;
  --secondary: #10B981;
  --neutral: #1F2937;
  --light: #F9FAFB;
  --gray-50: #F9FAFB;
  --gray-100: #F3F4F6;
  --gray-200: #E5E7EB;
  --gray-300: #D1D5DB;
  --gray-400: #6B7280;
  --gray-500: #4B5563;
  --gray-600: #374151;
  --gray-700: #1F2937;
  --gray-800: #111827;
  --gray-900: #000000;
}

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

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--gray-50);
  color: var(--neutral);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

header {
  background-color: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(8px);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  position: sticky;
  top: 0;
  z-index: 50;
  transition: all 0.3s;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
}

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

.logo-icon {
  color: var(--primary);
  font-size: 1.5rem;
}

.logo-text {
  font-size: 1.25rem;
  font-weight: 700;
  background: linear-gradient(to right, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.language-switcher {
  position: relative;
  display: inline-block;
}

.language-button {
  display: flex;
  align-items: center;
  padding: 0.5rem 1rem;
  background-color: var(--gray-100);
  color: var(--gray-700);
  border: 1px solid var(--gray-300);
  border-radius: 0.5rem;
  cursor: pointer;
  transition: all 0.3s;
  font-size: 0.9rem;
  font-weight: 500;
}

.language-button:hover {
  background-color: var(--gray-200);
  color: var(--primary);
}

.language-icon {
  margin-right: 0.5rem;
  font-size: 1rem;
}

.language-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  width: auto;
  min-width: 120px;
  background-color: white;
  border: 1px solid var(--gray-300);
  border-radius: 0.5rem;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.3s;
  z-index: 100;
  margin-top: 0.5rem;
}

.language-switcher.active .language-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.language-option {
  display: block;
  padding: 0.75rem 1rem;
  color: var(--gray-700);
  text-decoration: none;
  transition: all 0.2s;
  border-bottom: 1px solid var(--gray-100);
  white-space: nowrap;
  text-align: center;
}

.language-option:last-child {
  border-bottom: none;
}

.language-option:hover {
  background-color: var(--gray-50);
  color: var(--primary);
}

.menu-toggle {
  color: var(--gray-600);
  background: none;
  border: none;
  font-size: 1.25rem;
  cursor: pointer;
  margin-left: 1rem;
}

.mobile-menu {
  display: none;
}

main {
  flex: 1;
  padding: 2rem 0;
}

.intro-section {
  text-align: center;
  margin-bottom: 3rem;
  max-width: 48rem;
  margin-left: auto;
  margin-right: auto;
}

.intro-title {
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 1rem;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.intro-description {
  color: var(--gray-700);
  font-size: 1.125rem;
  margin-bottom: 1rem;
}

.stats-box {
  background: linear-gradient(135deg, rgba(79, 70, 229, 0.06) 0%, rgba(16, 185, 129, 0.06) 100%);
  border-radius: 0.75rem;
  padding: 1rem;
  margin: 1rem 0;
  transition: transform 0.3s;
}

.stats-box:hover {
  transform: translateY(-3px);
}

.stats-text {
  color: var(--gray-800);
  display: flex;
  align-items: center;
  justify-content: center;
}

.stats-icon {
  color: var(--primary);
  margin-right: 0.5rem;
}

.format-info {
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1rem;
  background-color: rgba(79, 70, 229, 0.15);
  color: var(--gray-800);
  border-radius: 9999px;
  font-size: 0.875rem;
}

.info-icon {
  margin-right: 0.5rem;
}

.main-section {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-bottom: 4rem;
}

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

.card {
  background-color: white;
  border-radius: 0.75rem;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
  padding: 1.5rem;
  transition: all 0.3s;
}

.card:hover {
  box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
}

.card-title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
}

.card-icon {
  color: var(--primary);
  margin-right: 0.5rem;
}

.upload-area {
  border: 2px dashed var(--gray-300);
  border-radius: 0.5rem;
  padding: 2rem;
  text-align: center;
  cursor: pointer;
  margin-bottom: 1.5rem;
  transition: all 0.3s;
}

.upload-area:hover, .upload-area.drag-over {
  transform: scale(1.02);
  background-color: rgba(79, 70, 229, 0.05);
}

.upload-icon {
  font-size: 2.25rem;
  color: var(--gray-400);
  margin-bottom: 1rem;
}

.upload-text {
  color: var(--gray-700);
  margin-bottom: 0.5rem;
}

.upload-subtext {
  color: var(--gray-500);
  font-size: 0.875rem;
}

.font-file-input {
  display: none;
}

.font-info {
  display: none;
}

.font-info.active {
  display: block;
}

.font-info-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem;
  background-color: var(--gray-50);
  border-radius: 0.5rem;
  margin-bottom: 1rem;
}

.font-name-container {
  display: flex;
  align-items: center;
}

.success-icon {
  color: var(--secondary);
  margin-right: 0.5rem;
}

.font-name {
  color: var(--gray-700);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 200px;
}

.remove-font {
  color: var(--gray-400);
  background: none;
  border: none;
  cursor: pointer;
  transition: color 0.3s;
}

.remove-font:hover {
  color: #EF4444;
}

.compare-toggle-container {
  margin: 1.5rem 0;
  display: flex;
  align-items: center;
}

.compare-toggle {
  position: relative;
  display: inline-block;
  width: 50px;
  height: 24px;
  margin-right: 10px;
  cursor: pointer;
}

.compare-toggle input {
  opacity: 0;
  width: 0;
  height: 0;
}

.compare-slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--gray-300);
  transition: .4s;
  border-radius: 24px;
}

.compare-slider:before {
  position: absolute;
  content: "";
  height: 16px;
  width: 16px;
  left: 4px;
  bottom: 4px;
  background-color: white;
  transition: .4s;
  border-radius: 50%;
}

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

input:checked + .compare-slider:before {
  transform: translateX(26px);
}

.compare-label {
  color: var(--gray-700);
  font-size: 0.9rem;
}

.second-font-section {
  display: none;
  margin-top: 1.5rem;
}

.second-font-section.active {
  display: block;
}

.control-panel {
  margin-top: 2rem;
}

.control-title {
  font-size: 1.125rem;
  font-weight: 500;
  margin-bottom: 1rem;
}

.control-group {
  margin-bottom: 1.5rem;
}

.control-label {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.5rem;
}

.label-text {
  color: var(--gray-700);
}

.value-text {
  color: var(--primary);
  font-weight: 500;
}

.slider {
  -webkit-appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 5px;
  background: var(--gray-200);
  outline: none;
}

.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
  transition: all 0.2s;
}

.slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
  box-shadow: 0 0 10px rgba(79, 70, 229, 0.5);
}

.slider::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
  border: none;
}

.color-control {
  display: flex;
  gap: 0.75rem;
}

.color-picker-container {
  position: relative;
  width: 40px;
  height: 40px;
}

.color-picker {
  width: 100%;
  height: 100%;
  border-radius: 8px;
  cursor: pointer;
  border: none;
  padding: 0;
  position: absolute;
  top: 0;
  left: 0;
  opacity: 0;
  z-index: 2;
}

.color-preview {
  width: 100%;
  height: 100%;
  border-radius: 8px;
  border: 2px solid var(--gray-300);
  display: block;
  transition: all 0.2s;
  position: absolute;
  top: 0;
  left: 0;
  z-index: 1;
}

.color-picker-container:hover .color-preview {
  border-color: var(--primary);
  transform: scale(1.05);
}

.color-input {
  flex: 1;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--gray-300);
  border-radius: 0.5rem;
  transition: all 0.3s;
}

.color-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(79, 70, 229, 0.2);
}

.reset-button {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 0.75rem;
  background-color: var(--gray-200);
  color: var(--gray-800);
  border: 1px solid var(--gray-400);
  border-radius: 0.5rem;
  cursor: pointer;
  transition: all 0.3s;
  margin-top: 1rem;
  font-weight: 500;
}

.reset-button:hover {
  background-color: var(--gray-200);
  color: var(--primary);
}

.reset-icon {
  margin-right: 0.5rem;
}

.preview-card {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.preview-textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--gray-300);
  border-radius: 0.5rem;
  margin-bottom: 1.5rem;
  resize: none;
  transition: all 0.3s;
  font-family: inherit;
}

.preview-textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(79, 70, 229, 0.2);
}

.preview-area {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  background-color: white;
  border-radius: 0.5rem;
  border: 1px solid var(--gray-200);
  margin-bottom: 1.5rem;
  min-height: 200px;
  transition: all 0.3s;
}

.preview-text {
  text-align: center;
  font-size: 2rem;
  color: var(--neutral);
  max-font-size: 100px;
}

.preview-hint {
  text-align: center;
  color: var(--gray-500);
  padding: 2rem 0;
}

.hint-icon {
  color: var(--gray-400);
  margin-bottom: 0.5rem;
  font-size: 1.25rem;
}

.compare-preview-area {
  display: none;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

.compare-preview-area.active {
  display: grid;
}

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

.compare-preview-box {
  background-color: white;
  border-radius: 0.5rem;
  border: 1px solid var(--gray-200);
  padding: 1.5rem;
  min-height: 200px;
  display: flex;
  flex-direction: column;
}

.compare-preview-title {
  font-size: 0.9rem;
  color: var(--gray-600);
  margin-bottom: 1rem;
  text-align: center;
  font-weight: 600;
}

.compare-preview-text {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-size: 2rem;
  color: var(--neutral);
  max-font-size: 100px;
}

.clear-button {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1.5rem;
  background-color: var(--primary);
  color: white;
  border: none;
  border-radius: 0.5rem;
  cursor: pointer;
  transition: background-color 0.3s;
  margin: 0 auto;
  font-weight: 600;
}

.clear-button:hover {
  background-color: rgba(79, 70, 229, 0.9);
}

.button-icon {
  margin-right: 0.5rem;
}

.features-section {
  background: linear-gradient(to right, rgba(79, 70, 229, 0.05), rgba(16, 185, 129, 0.05));
  border-radius: 1rem;
  padding: 3rem 0;
  margin-bottom: 2rem;
}

.features-title {
  font-size: 1.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 2.5rem;
}

.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-bottom: 3rem;
}

@media (min-width: 768px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

.feature-card {
  background-color: white;
  padding: 1.5rem;
  border-radius: 0.75rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  transition: all 0.3s;
  text-align: center;
}

.feature-card:hover {
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  transform: translateY(-4px);
}

.feature-icon {
  width: 3rem;
  height: 3rem;
  background-color: rgba(79, 70, 229, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
  color: var(--primary);
  font-size: 1.25rem;
}

.feature-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.feature-description {
  color: var(--gray-700);
}

.features-section .use-cases-section {
  background-color: transparent;
  padding: 0;
  margin-bottom: 3rem;
}

.features-section .use-cases-section .section-title {
  font-size: 1.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 1rem;
}

.features-section .use-cases-section .section-description {
  color: var(--gray-600);
  text-align: center;
  margin-bottom: 2.5rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.features-section .use-cases-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .features-section .use-cases-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .features-section .use-cases-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.features-section .use-case-card {
  background-color: white;
  padding: 1.5rem;
  border-radius: 0.75rem;
  text-align: center;
  transition: all 0.3s;
  border: 1px solid var(--gray-200);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.features-section .use-case-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
  border-color: var(--primary);
}

.features-section .use-case-icon {
  width: 4rem;
  height: 4rem;
  background-color: rgba(79, 70, 229, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
  color: var(--primary);
  font-size: 1.5rem;
}

.features-section .use-case-title {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.features-section .use-case-description {
  color: var(--gray-700);
  font-size: 0.9rem;
}

footer {
  background-color: var(--neutral);
  color: white;
  padding: 2rem 0;
}

.footer-logo {
  display: flex;
  justify-content: center;
  margin-bottom: 1.5rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: white;
}

.footer-text {
  text-align: center;
  color: var(--gray-300);
  font-size: 0.875rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--gray-700);
}

.notification {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: 0.5rem;
  box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
  transform: translateY(5rem);
  opacity: 0;
  transition: all 0.3s;
  display: flex;
  align-items: center;
  z-index: 100;
}

.notification.active {
  transform: translateY(0);
  opacity: 1;
}

.notification.success {
  background-color: var(--secondary);
  color: white;
  font-weight: 500;
}

.notification.error {
  background-color: #DC2626;
  color: white;
  font-weight: 500;
}

.notification.info {
  background-color: var(--primary);
  color: white;
  font-weight: 500;
}

@media (max-width: 767px) {
  .menu-toggle {
    display: none;
  }
  
  .language-switcher {
    display: block;
  }
  
  .language-dropdown {
    right: 0;
    left: auto;
  }
  
  .mobile-menu {
    display: none !important;
  }
}

@media (min-width: 768px) {
  .menu-toggle {
    display: none;
  }
  
  main {
    padding: 4rem 0;
  }
}

.preview-text,
.compare-preview-text {
  max-font-size: 100px;
}

button:focus,
input:focus,
textarea:focus,
select:focus,
.language-button:focus,
.clear-button:focus,
.reset-button:focus,
.remove-font:focus,
.color-picker-container:focus .color-preview,
.compare-toggle:focus .compare-slider {
  outline: 3px solid var(--primary);
  outline-offset: 2px;
}

.upload-area:focus {
  outline: 3px solid var(--primary);
  outline-offset: 2px;
  border-color: var(--primary);
}

.language-option:focus {
  background-color: var(--primary);
  color: white;
}

.compare-toggle:focus-within .compare-slider {
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.3);
}