:root {
  --bg-color: #f8f9fa;
  --card-bg: #ffffff;
  --text-main: #2d3436;
  --text-muted: #636e72;
  --accent-color: #0984e3;
  --accent-hover: #74b9ff;
  --border-color: #dfe6e9;
  --shadow-sm: 0 4px 6px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 10px 15px rgba(0, 0, 0, 0.08);
  --radius: 12px;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
  background-color: var(--bg-color);
  color: var(--text-main);
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  padding: 20px;
}

.container {
  background-color: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  padding: 40px;
  width: 100%;
  max-width: 480px;
  text-align: center;
  transition: transform 0.2s ease;
}

/* Header */
header {
  margin-bottom: 30px;
}

.header-top {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  margin-bottom: 8px;
}

h1 {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin: 0;
}

.lang-btn {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 4px 8px;
  font-size: 0.8rem;
  cursor: pointer;
  color: var(--text-muted);
  transition: all 0.2s;
}

.lang-btn:hover {
  border-color: var(--accent-color);
  color: var(--accent-color);
}

.accent {
  color: var(--accent-color);
}

.subtitle {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.5;
}

/* Upload Area */
.upload-area {
  margin-bottom: 25px;
}

.upload-label {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border: 2px dashed var(--border-color);
  border-radius: var(--radius);
  padding: 40px 20px;
  cursor: pointer;
  transition: all 0.3s ease;
  background-color: #fafbfc;
}

.upload-label:hover,
.upload-label.dragover {
  border-color: var(--accent-color);
  background-color: #f0f7ff;
}

.upload-label .icon {
  font-size: 2.5rem;
  margin-bottom: 10px;
  opacity: 0.8;
}

.upload-label .text {
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.95rem;
}

/* Controls */
.controls {
  margin-bottom: 25px;
  display: flex;
  justify-content: center;
}

.toggle-switch {
  position: relative;
  display: inline-flex;
  align-items: center;
  cursor: pointer;
  user-select: none;
}

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

.slider {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
  background-color: #ccc;
  border-radius: 34px;
  transition: 0.3s;
  margin-right: 12px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background-color: white;
  border-radius: 50%;
  transition: 0.3s;
  box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

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

input:checked + .slider:before {
  transform: translateX(20px);
}

.label-text {
  font-size: 0.95rem;
  color: var(--text-main);
}

/* Status Message */
.status-message {
  margin-top: 20px;
  padding: 12px;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 500;
}

.status-message.hidden {
  display: none;
}

.status-message.success {
  background-color: #e3fcef;
  color: #00b894;
}

.status-message.error {
  background-color: #ffeaa7;
  color: #d63031;
}

.status-message.processing {
  background-color: #f1f2f6;
  color: var(--text-muted);
}

/* Footer */
footer {
  margin-top: 30px;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
  font-size: 0.85rem;
  color: var(--text-muted);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.github-link {
  color: var(--accent-color);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}

.github-link:hover {
  text-decoration: underline;
  color: var(--accent-hover);
}