* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: #2f3b33;
  background: linear-gradient(180deg, #f6fbf7 0%, #eef6f0 100%);
  min-height: 100vh;
}

.qr-container {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 48px 20px;
}

.qr-card {
  width: 80%;
  max-width: 1400px;
  background: #fff;
  border-radius: 16px;
  border: 1px solid rgba(118, 208, 106, 0.18);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.08);
  padding: 40px;
}

.qr-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 28px;
}

.qr-header-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: 14px;
  font-size: 18px;
  font-weight: 700;
  color: #4caf50;
  background: rgba(118, 208, 106, 0.12);
  border: 1px solid rgba(118, 208, 106, 0.25);
  flex-shrink: 0;
}

.qr-title {
  margin: 0 0 4px;
  font-size: 22px;
  font-weight: 700;
}

.qr-subtitle {
  margin: 0;
  font-size: 13px;
  color: #7a857d;
  line-height: 1.5;
}

.qr-form {
  margin-bottom: 24px;
}

.qr-label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.4px;
  text-transform: uppercase;
  color: #8a948c;
  margin-bottom: 8px;
}

.qr-input-row {
  display: flex;
  gap: 10px;
}

.qr-input {
  flex: 1 1 auto;
  height: 44px;
  border-radius: 10px;
  border: 1px solid #d7e2d9;
  padding: 0 14px;
  font-size: 14px;
  color: #2f3b33;
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.qr-input:focus {
  outline: none;
  border-color: #76d06a;
  box-shadow: 0 0 0 3px rgba(118, 208, 106, 0.18);
}

.qr-decode-btn {
  flex: 0 0 auto;
  height: 44px;
  padding: 0 26px;
  border-radius: 10px;
  border: none;
  background: #4caf50;
  color: #fff;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  transition: background 0.18s ease, opacity 0.18s ease;
}

.qr-decode-btn:hover:not(:disabled) {
  background: #43a047;
}

.qr-decode-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.qr-local-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 10px;
}

.qr-upload-btn {
  flex: 0 0 auto;
  height: 36px;
  padding: 0 16px;
  border-radius: 9px;
  border: 1px solid rgba(118, 208, 106, 0.4);
  background: rgba(118, 208, 106, 0.1);
  color: #4caf50;
  font-weight: 600;
  font-size: 13px;
  cursor: pointer;
  transition: background 0.18s ease, opacity 0.18s ease;
}

.qr-upload-btn:hover:not(:disabled) {
  background: rgba(118, 208, 106, 0.18);
}

.qr-upload-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.qr-local-hint {
  font-size: 12px;
  color: #7a857d;
}

.qr-hidden-file {
  display: none;
}

.qr-status {
  margin: 12px 0 0;
  min-height: 18px;
  font-size: 13px;
  color: #7a857d;
}

.qr-status-loading {
  color: #2f80ed;
}
.qr-status-success {
  color: #2e9e4f;
}
.qr-status-error {
  color: #d9534f;
}

.qr-body {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.qr-preview-wrap,
.qr-result-wrap {
  flex: 1 1 280px;
  min-width: 240px;
  display: flex;
  flex-direction: column;
}

.qr-section-label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.4px;
  text-transform: uppercase;
  color: #8a948c;
  margin-bottom: 8px;
}

.qr-preview {
  border: 1px dashed #cfdcd2;
  border-radius: 12px;
  background: #f8fbf9;
  min-height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px;
  overflow: hidden;
}

.qr-preview-empty {
  color: #b3bdb6;
}

.qr-preview-img {
  max-width: 100%;
  max-height: 360px;
  object-fit: contain;
  border-radius: 8px;
}

.qr-result {
  flex: 1 1 auto;
  border: 1px solid #e2e9e4;
  border-radius: 12px;
  background: #f8fbf9;
  min-height: 320px;
  padding: 14px 16px;
  font-family: Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 13px;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-all;
  overflow: auto;
}

.qr-result-empty {
  display: flex;
  align-items: center;
  justify-content: center;
  color: #b3bdb6;
}

.qr-copy-btn {
  margin-top: 12px;
  align-self: flex-start;
  border-radius: 8px;
  border: 1px solid #d7e2d9;
  background: #fff;
  padding: 8px 16px;
  font-size: 13px;
  cursor: pointer;
}

.qr-copy-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.qr-hidden-canvas {
  display: none;
}

@media (max-width: 600px) {
  .qr-card {
    width: 100%;
    padding: 22px;
  }
  .qr-input-row {
    flex-direction: column;
  }
  .qr-decode-btn {
    width: 100%;
  }
}