:root {
  --primary-color: #4361ee;
  --primary-hover: #3a56d4;
  --secondary-color: #48bfe3;
  --success-color: #57cc99;
  --warning-color: #f9c74f;
  --danger-color: #e63946;
  --light-color: #f8f9fa;
  --dark-color: #212529;
  --gray-color: #6c757d;
  --light-gray: #e9ecef;
  --border-radius: 8px;
  --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  --transition: all 0.3s ease;
}

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

body {
  font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background-color: #f7f9fc;
  color: var(--dark-color);
  line-height: 1.6;
  margin: 0;
  padding: 0;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem 1rem;
}

/* Typography */
.main-title {
  font-size: 2.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 2rem;
  color: var(--primary-color);
}

.section-title {
  font-size: 1.75rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  color: var(--dark-color);
}

/* Language Switcher */
.language-switcher {
  display: flex;
  justify-content: flex-end;
  margin: 1rem 0;
  padding: 0.5rem;
}

.lang-btn {
  padding: 0.5rem 1rem;
  border: none;
  background-color: var(--light-gray);
  color: var(--dark-color);
  font-weight: 500;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: var(--transition);
  margin-left: 0.5rem;
  display: flex;
  align-items: center;
  gap: 6px;
}

.lang-btn.active {
  background-color: var(--primary-color);
  color: white;
}

.lang-btn:hover:not(.active) {
  background-color: #dce1e9;
}

/* Tabs */
.tabs {
  display: flex;
  background-color: white;
  border-radius: var(--border-radius) var(--border-radius) 0 0;
  overflow: hidden;
  margin-bottom: 0;
  box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
}

.tab {
  flex: 1;
  text-align: center;
  padding: 1rem;
  cursor: pointer;
  font-weight: 500;
  transition: var(--transition);
  border-bottom: 3px solid transparent;
}

.tab:hover:not(.active) {
  background-color: var(--light-gray);
}

.tab.active {
  background-color: white;
  border-bottom: 3px solid var(--primary-color);
  color: var(--primary-color);
}

/* Forms */
.form-card {
  background-color: white;
  border-radius: 0 0 var(--border-radius) var(--border-radius);
  padding: 1.5rem;
  box-shadow: var(--box-shadow);
  margin-bottom: 2rem;
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

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

label {
  display: block;
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: var(--dark-color);
}

input[type="file"],
input[type="text"],
input[type="url"],
input[type="number"],
input[type="password"],
select,
textarea {
  width: 100%;
  padding: 0.75rem;
  font-size: 1rem;
  border: 1px solid #ddd;
  border-radius: var(--border-radius);
  background-color: var(--light-color);
  transition: var(--transition);
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.15);
}

textarea {
  min-height: 120px;
  resize: vertical;
}

.select-dropdown {
  appearance: none;
  background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23212529' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  background-size: 1em;
}

/* Buttons */
.btn-submit,
.btn-primary {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 500;
  text-align: center;
  color: white;
  background-color: var(--primary-color);
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: var(--transition);
  width: 100%;
}

.btn-submit:hover,
.btn-primary:hover {
  background-color: var(--primary-hover);
  transform: translateY(-2px);
}

.btn-submit:active,
.btn-primary:active {
  transform: translateY(0);
}

/* API Key container */
.api-key-container {
  background-color: white;
  padding: 1.5rem;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  margin-bottom: 1.5rem;
}

.input-with-button {
  display: flex;
  gap: 0.5rem;
}

.input-with-button input {
  flex: 1;
}

.input-with-button button {
  width: auto;
}

/* Result section */
.result-section {
  background-color: white;
  border-radius: var(--border-radius);
  padding: 1.5rem;
  box-shadow: var(--box-shadow);
  margin-top: 2rem;
}

.result-content {
  background-color: var(--light-color);
  border-radius: var(--border-radius);
  padding: 1rem;
  margin-top: 1rem;
  white-space: pre-line;
  word-wrap: break-word;
  word-break: break-word;
  font-family: monospace;
  min-height: 200px;
  max-height: 500px;
  overflow-y: auto;
  line-height: 1.5;
}

.loading {
  display: none;
  text-align: center;
  margin: 1rem 0;
  color: var(--gray-color);
}

/* Helper classes */
.hidden {
  display: none !important;
}

.success-text {
  color: var(--success-color);
  font-weight: 500;
  margin-top: 0.5rem;
  display: inline-block;
}

/* Action buttons */
.action-buttons {
  display: flex;
  gap: 0.75rem;
  margin-top: 1rem;
}

.action-buttons button {
  flex: 1;
  padding: 0.6rem;
}

.copy-button {
  background-color: var(--secondary-color);
}

.copy-button:hover {
  background-color: #3aa5c9;
}

.reconstruct-button {
  background-color: var(--warning-color);
}

.reconstruct-button:hover {
  background-color: #e6b63b;
}

.play-button {
  background-color: var(--success-color);
  color: white;
  border: none;
  border-radius: var(--border-radius);
  padding: 0.6rem 1rem;
  cursor: pointer;
  transition: var(--transition);
  font-weight: 500;
}

.play-button:hover {
  background-color: #4ab583;
  transform: translateY(-2px);
}

.download-button {
  background-color: var(--primary-color);
  color: white;
  border: none;
  border-radius: var(--border-radius);
  padding: 0.6rem 1rem;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  display: inline-block;
  text-align: center;
  font-weight: 500;
}

.download-button:hover {
  background-color: var(--primary-hover);
  transform: translateY(-2px);
}

.audio-player {
  margin: 1rem 0;
  width: 100%;
}

.audio-player audio {
  width: 100%;
  border-radius: var(--border-radius);
}

/* Responsive adjustments */
@media screen and (max-width: 768px) {
  .container {
    padding: 1rem;
  }

  .main-title {
    font-size: 2rem;
  }

  .form-card {
    padding: 1rem;
  }

  .tabs {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .tab {
    flex: 1 0 33%;
    padding: 0.75rem 0.5rem;
    font-size: 0.9rem;
  }

  .input-with-button {
    flex-direction: column;
  }

  .input-with-button button {
    width: 100%;
    margin-top: 0.5rem;
  }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
  :root {
    --primary-color: #6366f1;
    --primary-hover: #818cf8;
    --light-color: #1f2937;
    --dark-color: #f9fafb;
    --light-gray: #374151;
  }

  body {
    background-color: #111827;
  }

  .form-card,
  .api-key-container,
  .result-section,
  .tabs {
    background-color: #1f2937;
  }

  .tab.active {
    background-color: #1f2937;
  }

  input, select, textarea {
    background-color: #374151;
    color: #f9fafb;
    border-color: #4b5563;
  }

  .result-content {
    background-color: #374151;
    color: #f9fafb;
  }

.version-info {
  position: fixed;
  top: 10px;
  left: 10px;
  font-size: 12px;
  color: #666;
  background-color: rgba(255, 255, 255, 0.8);
  padding: 5px 8px;
  border-radius: 4px;
  z-index: 1000;
  font-family: sans-serif;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}
}