:root {
  --brand-green: #4E5851;
  --brand-green-dark: #3B4A45;
  --brand-orange: #FF7800;
  --bg-page: #FAFBFC;
  --bg-card: #FFFFFF;
  --text-main: #1F2A28;
  --text-secondary: #6B7A76;
  --border-line: #E5E8E7;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Noto Sans TC", -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-page);
  color: var(--text-main);
}

.page {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 20px 80px;
}

.header h1 {
  font-weight: 900;
  font-size: 32px;
  color: var(--brand-green-dark);
  margin: 0 0 8px;
}

.subtitle {
  color: var(--text-secondary);
  margin: 0 0 24px;
  font-size: 15px;
  line-height: 1.6;
}

.input-card {
  background: var(--bg-card);
  border: 1px solid var(--border-line);
  border-radius: 16px;
  padding: 20px;
  margin-bottom: 20px;
}

.upload-label {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 64px;
  border: 2px dashed var(--border-line);
  border-radius: 12px;
  color: var(--text-secondary);
  font-size: 15px;
  text-align: center;
  padding: 12px;
  cursor: pointer;
}

.upload-label.has-file {
  border-color: var(--brand-green);
  color: var(--brand-green-dark);
  font-weight: 700;
}

.divider {
  display: flex;
  align-items: center;
  text-align: center;
  color: var(--text-secondary);
  font-size: 13px;
  margin: 18px 0;
}

.divider::before,
.divider::after {
  content: "";
  flex: 1;
  border-bottom: 1px solid var(--border-line);
}

.divider span {
  padding: 0 12px;
}

textarea#text-input {
  width: 100%;
  font-size: 16px;
  font-family: inherit;
  color: var(--text-main);
  border: 1px solid var(--border-line);
  border-radius: 12px;
  padding: 14px;
  resize: vertical;
  line-height: 1.6;
}

textarea#text-input:focus {
  outline: none;
  border-color: var(--brand-green);
}

.input-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  margin-top: 14px;
}

.status-text {
  font-size: 14px;
  color: var(--text-secondary);
}

.btn-primary {
  background: var(--brand-orange);
  color: #fff;
  border: none;
  border-radius: 20px;
  padding: 10px 28px;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: default;
}

.note-section {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.7;
  text-align: center;
  padding: 0 8px;
}