/* Professional TTS Plugin Styles */
:root {
  --primary-color: #2563eb;
  --primary-hover: #1d4ed8;
  --secondary-color: #64748b;
  --secondary-hover: #475569;
  --success-color: #10b981;
  --success-hover: #059669;
  --error-color: #ef4444;
  --warning-color: #f59e0b;
  --background-primary: #ffffff;
  --background-secondary: #f8fafc;
  --background-tertiary: #f1f5f9;
  --border-color: #e2e8f0;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --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);
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Container chính của plugin */
.piper-tts-container {
  max-width: 700px;
  margin: 30px auto;
  padding: 24px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  background: var(--background-primary);
  box-shadow: var(--shadow-lg);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  box-sizing: border-box;
  position: relative;
  overflow: hidden;
}

.piper-tts-container::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-color), var(--success-color));
  border-top-left-radius: var(--radius-lg);
  border-top-right-radius: var(--radius-lg);
}

/* Khu vực nhập văn bản */
#tts-input {
  width: 100%;
  height: 140px;
  padding: 12px 16px;
  font-size: 15px;
  font-family: inherit;
  line-height: 1.5;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  background: var(--background-primary);
  color: var(--text-primary);
  margin-bottom: 20px;
  resize: vertical;
  box-sizing: border-box;
  transition: var(--transition);
}

#tts-input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

#tts-input::placeholder {
  color: var(--text-muted);
}

/* Nhóm các nút hành động chính (Làm sạch và Tạo âm thanh) */
.button-group {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

/* Nút tạo âm thanh (Primary button) và Nút làm sạch (Secondary button) */
#tts-submit,
#tts-clean-text {
  padding: 12px 24px;
  font-size: 16px;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition);
  flex: 1 1 auto;
  min-width: 120px;
  box-sizing: border-box;
  position: relative;
  overflow: hidden;
}

#tts-submit {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
  color: white;
}

#tts-submit::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s;
}

#tts-submit:hover::before {
  left: 100%;
}

#tts-submit:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

#tts-submit:active {
  transform: translateY(0);
}

#tts-clean-text {
    background: var(--secondary-color);
    color: white;
}

#tts-clean-text:hover {
    background: var(--secondary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

#tts-clean-text:active {
    transform: translateY(0);
}

/* --- Chia các nút điều khiển thành 2 cột --- */
.controls-grid {
    display: grid;
    /* Dùng auto-fit với minmax(min-width, 1fr) để đảm bảo 2 cột trên màn hình rộng */
    /* và tự động chuyển về 1 cột khi không gian không đủ cho 2 cột min 280px */
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); 
    gap: 20px;
    margin-bottom: 20px;
}

.control-group {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

/* Container cho thanh trượt */
.slider-container {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 8px;
  padding: 16px;
  background: var(--background-secondary);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  flex-wrap: wrap; 
  width: 100%;
  box-sizing: border-box;
}

.slider-container label {
  font-weight: 600;
  color: var(--text-primary);
  font-size: 14px;
  white-space: nowrap;
  flex-shrink: 0;
}

/* Kiểu dáng chung cho tất cả các thanh trượt */
input[type="range"] {
  flex: 1 1 auto;
  min-width: 100px;
  height: 6px;
  background: var(--background-tertiary);
  border-radius: 3px;
  outline: none;
  -webkit-appearance: none;
  appearance: none;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  background: var(--primary-color);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

input[type="range"]::-webkit-slider-thumb:hover {
  background: var(--primary-hover);
  transform: scale(1.1);
}

input[type="range"]::-moz-range-thumb {
  width: 20px;
  height: 20px;
  background: var(--primary-color);
  border-radius: 50%;
  cursor: pointer;
  border: none;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

/* Hiển thị giá trị của các thanh trượt */
.slider-container span {
  font-weight: 700;
  min-width: 50px;
  text-align: right;
  color: var(--primary-color);
  font-size: 16px;
  padding: 4px 8px;
  background: rgba(37, 99, 235, 0.1);
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

/* Dòng hướng dẫn cho các điều khiển */
.control-tip {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 0;
  margin-bottom: 0;
  line-height: 1.4;
  padding-left: 16px;
  position: relative;
}

.control-tip::before {
  content: "💡";
  position: absolute;
  left: 0;
  top: 0;
}

/* Khu vực trạng thái và nút tải xuống */
.status-area {
  margin-top: 20px;
  padding: 20px;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  background: var(--background-secondary);
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-height: 60px;
  box-sizing: border-box;
  transition: var(--transition);
}

.status-area.has-content {
  border-color: var(--success-color);
  background: rgba(16, 185, 129, 0.05);
}

.status-message {
  font-weight: 600;
  color: var(--text-primary);
  text-align: left;
  font-size: 15px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.status-message::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-muted);
}

/* Các màu chữ cụ thể cho trạng thái */
.status-message.success {
  color: var(--success-color);
}

.status-message.success::before {
  background: var(--success-color);
}

.status-message.error {
  color: var(--error-color);
}

.status-message.error::before {
  background: var(--error-color);
}

.status-message.loading {
  color: var(--warning-color);
}

.status-message.loading::before {
  background: var(--warning-color);
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* Container cho các nút tải xuống */
.download-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: flex-start;
  width: 100%;
  margin-top: 8px;
}

.download-links a,
.download-links button {
  background: linear-gradient(135deg, var(--success-color), var(--success-hover));
  color: white;
  padding: 10px 16px;
  border: none;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: var(--transition);
  white-space: nowrap;
  box-sizing: border-box;
  min-width: 100px;
  position: relative;
  overflow: hidden;
}

.download-links a::before,
.download-links button::before {
  content: '⬇';
  font-size: 12px;
}

.download-links a:hover,
.download-links button:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.download-links a:active,
.download-links button:active {
  transform: translateY(0);
}

#tts-audio {
  margin-top: 20px;
  width: 100%;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

/* Responsive Design */
@media (max-width: 768px) {
  .piper-tts-container {
    margin: 20px 16px;
    padding: 20px;
  }
  
  .button-group {
    flex-direction: column;
  }
  
  .download-links {
    flex-direction: column;
  }
  
  .controls-grid {
    grid-template-columns: 1fr; /* Luôn là 1 cột trên màn hình nhỏ */
  }

  .slider-container {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }
  
  .slider-container span {
    text-align: center;
  }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
  :root {
    --background-primary: #1e293b;
    --background-secondary: #334155;
    --background-tertiary: #475569;
    --border-color: #475569;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
  }
  
  .piper-tts-container {
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.2);
  }
}