*,
*::before,
*::after {
  box-sizing: border-box;
}

:root {
  --color-bg: #f5f7fa;
  --color-surface: #ffffff;
  --color-primary: #1a73e8;
  --color-primary-dark: #1557b0;
  --color-success: #0d9f6e;
  --color-text: #1f2937;
  --color-text-muted: #6b7280;
  --color-border: #e5e7eb;
  --radius: 12px;
  --shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-tap-highlight-color: transparent;
}

body {
  padding-bottom: calc(16px + var(--safe-bottom));
}

.app-header {
  background: linear-gradient(135deg, #1a73e8 0%, #4285f4 100%);
  color: #fff;
  padding: 20px 16px 24px;
  text-align: center;
}

.app-header h1 {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 600;
}

.subtitle {
  margin: 6px 0 0;
  font-size: 0.85rem;
  opacity: 0.9;
}

.app-main {
  padding: 16px;
  max-width: 480px;
  margin: 0 auto;
}

.toolbar {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 10px 16px;
  border: none;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: opacity 0.15s, transform 0.1s;
  text-decoration: none;
  color: inherit;
}

.btn:active:not(:disabled) {
  transform: scale(0.97);
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  flex: 1;
  min-width: 100px;
}

.btn-success {
  background: var(--color-success);
  color: #fff;
  flex: 1;
  min-width: 100px;
}

.btn-ghost {
  background: var(--color-surface);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}

.btn-icon-only {
  width: 36px;
  height: 36px;
  border: none;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.06);
  font-size: 1.1rem;
  cursor: pointer;
  line-height: 1;
}

.record-count {
  margin: 14px 0 8px;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.record-count strong {
  color: var(--color-primary);
  font-size: 1.1rem;
}

.record-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.record-item .record-index {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
}

.record-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.thumb-wrap {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  overflow: hidden;
}

.thumb-wrap--qr {
  width: 52px;
  height: 52px;
}

.thumb-wrap--barcode {
  width: 72px;
  height: 40px;
}

.record-item .thumb {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

.number-row {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.format-tag {
  font-size: 0.65rem;
  padding: 2px 6px;
  border-radius: 4px;
  background: #e8f0fe;
  color: var(--color-primary);
  font-weight: 500;
  flex-shrink: 0;
}

.record-item .info {
  flex: 1;
  min-width: 0;
}

.record-item .number {
  font-size: 0.95rem;
  font-weight: 600;
  word-break: break-all;
}

.record-item .code {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-top: 2px;
  word-break: break-all;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.record-item .btn-delete {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border: none;
  border-radius: 8px;
  background: #fee2e2;
  color: #dc2626;
  font-size: 1rem;
  cursor: pointer;
}

.empty-hint {
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  padding: 32px 16px;
}

.empty-hint.hidden {
  display: none;
}

/* Scanner overlay */
.scanner-overlay,
.preview-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(0, 0, 0, 0.85);
  display: flex;
  flex-direction: column;
}

.scanner-overlay.hidden,
.preview-overlay.hidden {
  display: none;
}

.scanner-panel,
.preview-panel {
  display: flex;
  flex-direction: column;
  height: 100%;
  background: #111;
  color: #fff;
}

.preview-panel {
  background: var(--color-bg);
  color: var(--color-text);
}

.scanner-header,
.preview-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  padding-top: calc(12px + env(safe-area-inset-top, 0px));
}

.scanner-header h2,
.preview-header h2 {
  margin: 0;
  font-size: 1rem;
  font-weight: 500;
}

.qr-reader {
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

.qr-reader video {
  object-fit: cover !important;
}

.scanner-controls {
  padding: 8px 12px;
  background: rgba(0, 0, 0, 0.35);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.scan-mode-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 10px;
}

.scan-mode-btn {
  flex: 1;
  padding: 8px;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 8px;
  background: transparent;
  color: #fff;
  font-size: 0.9rem;
  cursor: pointer;
}

.scan-mode-btn.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.frame-sliders {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.slider-row {
  display: grid;
  grid-template-columns: 56px 1fr 40px;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.9);
}

.slider-row input[type="range"] {
  width: 100%;
  accent-color: var(--color-primary);
}

.slider-row.hidden {
  display: none;
}

.scanner-tip {
  text-align: center;
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.7);
  padding: 12px 16px calc(12px + var(--safe-bottom));
  margin: 0;
}

/* Install banner */
.install-banner {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  background: #e8f0fe;
  border-bottom: 1px solid #c6dafc;
  color: #1f2937;
}

.install-banner.hidden {
  display: none;
}

.install-banner-text {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
  font-size: 0.8rem;
}

.install-banner-text strong {
  font-size: 0.9rem;
  color: var(--color-primary);
}

.btn-install-action {
  flex-shrink: 0;
  padding: 6px 14px;
  border: none;
  border-radius: 8px;
  background: var(--color-primary);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
}

.btn-install-dismiss {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border: none;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.06);
  font-size: 1.1rem;
  line-height: 1;
  cursor: pointer;
  color: var(--color-text-muted);
}

/* Dialog */
.confirm-dialog {
  border: none;
  border-radius: var(--radius);
  padding: 0;
  max-width: calc(100vw - 32px);
  width: 340px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.confirm-dialog::backdrop {
  background: rgba(0, 0, 0, 0.5);
}

.confirm-dialog form {
  padding: 20px;
}

.confirm-dialog h3 {
  margin: 0 0 16px;
  font-size: 1.1rem;
}

.dialog-label {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin: 0 0 4px;
}

.dialog-code {
  font-size: 0.8rem;
  background: #f3f4f6;
  padding: 8px;
  border-radius: 8px;
  word-break: break-all;
  margin: 0 0 12px;
  max-height: 80px;
  overflow-y: auto;
}

.dialog-input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-size: 1rem;
  margin-bottom: 16px;
}

.format-confirm-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}

.format-confirm-btn {
  flex: 1;
  padding: 8px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: #fff;
  font-size: 0.85rem;
  cursor: pointer;
  color: var(--color-text);
}

.format-confirm-btn.active {
  border-color: var(--color-primary);
  background: #e8f0fe;
  color: var(--color-primary);
  font-weight: 600;
}

.dialog-actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
}

.dialog-actions .btn {
  min-width: 80px;
}

/* Preview */
.preview-scroll {
  flex: 1;
  overflow: auto;
  padding: 16px;
  display: flex;
  justify-content: center;
  background: #e5e7eb;
}

.preview-scroll img {
  max-width: 100%;
  height: auto;
  box-shadow: var(--shadow);
  background: #fff;
}

.preview-actions {
  padding: 12px 16px calc(12px + var(--safe-bottom));
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
}

.preview-actions .btn {
  width: 100%;
}

.app-footer {
  text-align: center;
  padding: 8px 16px;
}

.btn-install-link {
  background: none;
  border: none;
  color: var(--color-primary);
  font-size: 0.9rem;
  text-decoration: underline;
  cursor: pointer;
  padding: 8px;
}

.btn-install-link.hidden {
  display: none;
}

@media (min-width: 481px) {
  .scanner-overlay,
  .preview-overlay {
    align-items: center;
    justify-content: center;
    padding: 24px;
  }

  .scanner-panel {
    max-width: 420px;
    max-height: 90vh;
    border-radius: var(--radius);
    overflow: hidden;
  }

  .preview-panel {
    max-width: 480px;
    max-height: 90vh;
    width: 100%;
    border-radius: var(--radius);
    overflow: hidden;
  }
}