:root {
  --bg-page: #f5f7f9;
  --bg-surface: #ffffff;
  --bg-subtle: #eff3f7;
  --border-light: #d9e1e8;
  --border-focus: #1d4ed8;

  --text-primary: #14202b;
  --text-secondary: #475869;
  --text-muted: #64748b;

  --accent-primary: #154c79;
  --accent-primary-hover: #0f3a5d;
  --accent-soft: #e8f1f8;

  /* Verdict Banner Palettes: Red, Amber, Grey */
  --verdict-red-bg: #b91c1c;
  --verdict-red-text: #ffffff;
  --verdict-red-pill: rgba(255, 255, 255, 0.18);

  --verdict-amber-bg: #f59e0b;
  --verdict-amber-border: #d97706;
  --verdict-amber-text: #3b1804;
  --verdict-amber-pill: rgba(59, 24, 4, 0.12);

  --verdict-grey-bg: #475569;
  --verdict-grey-text: #ffffff;
  --verdict-grey-pill: rgba(255, 255, 255, 0.18);

  /* Highlight tokens */
  --hl-bg: #fef08a;
  --hl-border: #ca8a04;
  --hl-text: #1c1917;
  --hl-active-bg: #fde047;
  --hl-active-ring: #b91c1c;

  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;

  --shadow-card: 0 2px 10px rgba(15, 23, 42, 0.05), 0 1px 2px rgba(15, 23, 42, 0.04);
}

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

[hidden] {
  display: none !important;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background-color: var(--bg-page);
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 1.0625rem;
  line-height: 1.6;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.page-shell {
  max-width: 680px;
  margin: 0 auto;
  padding: 20px 16px 40px;
}

@media (min-width: 600px) {
  .page-shell {
    padding: 36px 24px 56px;
  }
}

/* Header */
.site-header {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 22px;
}

.brand-badge {
  flex-shrink: 0;
  width: 46px;
  height: 46px;
  border-radius: 13px;
  background-color: var(--accent-soft);
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 2px;
}

.header-copy h1 {
  margin: 0 0 6px;
  font-size: 1.55rem;
  line-height: 1.25;
  font-weight: 750;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.header-divider {
  color: var(--text-muted);
  font-weight: 500;
}

.header-sub {
  font-weight: 600;
  color: var(--accent-primary);
}

.lead {
  margin: 0;
  font-size: 1.05rem;
  line-height: 1.55;
  color: var(--text-secondary);
}

/* Cards */
.card {
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-card);
}

@media (min-width: 600px) {
  .card {
    padding: 24px;
  }
}

/* API Key Bar */
.api-key-card {
  margin-bottom: 16px;
  background: #f8fafc;
}

.api-key-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 10px;
}

.api-key-label {
  display: block;
  font-weight: 650;
  font-size: 0.98rem;
}

.api-key-help {
  margin: 2px 0 0;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.text-link {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--accent-primary);
  text-decoration: underline;
  white-space: nowrap;
}

.api-key-row {
  display: flex;
  gap: 8px;
}

.api-key-input {
  flex: 1;
  min-height: 44px;
  padding: 10px 12px;
  font-size: 1rem;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  background: #ffffff;
  color: var(--text-primary);
}

/* Sample Message Bar */
.samples-bar {
  background: var(--bg-subtle);
  border-radius: var(--radius-md);
  padding: 14px;
  margin-bottom: 18px;
}

.samples-top-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 10px;
}

.samples-label {
  font-size: 0.94rem;
  font-weight: 650;
  color: var(--text-secondary);
}

.sample-lang-group {
  display: inline-flex;
  background: #e2e8f0;
  padding: 3px;
  border-radius: 999px;
  gap: 2px;
}

.lang-pill {
  border: 0;
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.82rem;
  font-weight: 650;
  padding: 5px 10px;
  border-radius: 999px;
  cursor: pointer;
  min-height: 30px;
}

.lang-pill.is-active {
  background: #ffffff;
  color: var(--text-primary);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.08);
}

.sample-buttons {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
}

@media (min-width: 480px) {
  .sample-buttons {
    grid-template-columns: repeat(3, 1fr);
  }
}

.sample-btn {
  min-height: 44px;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
  background: #ffffff;
  color: var(--text-primary);
  font-size: 0.96rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.sample-btn:hover {
  background: #f8fafc;
  border-color: #94a3b8;
}

.sample-btn.is-selected {
  border-color: var(--accent-primary);
  background: var(--accent-soft);
  color: var(--accent-primary);
}

/* Form Controls */
.field-group {
  margin-bottom: 16px;
}

.field-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.field-label {
  font-weight: 650;
  font-size: 1.05rem;
  color: var(--text-primary);
}

.link-btn {
  background: none;
  border: 0;
  padding: 4px 6px;
  font-size: 0.94rem;
  font-weight: 600;
  color: var(--accent-primary);
  cursor: pointer;
  text-decoration: underline;
}

.danger-link {
  color: #b91c1c;
}

textarea {
  width: 100%;
  padding: 14px;
  font-family: inherit;
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--text-primary);
  background: #ffffff;
  border: 1.5px solid var(--border-light);
  border-radius: var(--radius-md);
  resize: vertical;
  min-height: 136px;
}

textarea:focus,
.api-key-input:focus,
button:focus-visible,
.upload-zone:focus-within {
  outline: 3px solid rgba(29, 78, 216, 0.28);
  border-color: var(--border-focus);
}

.divider-or {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 14px 0;
  color: var(--text-muted);
  font-size: 0.92rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.divider-or::before,
.divider-or::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border-light);
}

/* Upload Zone */
.upload-zone {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 4px;
  padding: 18px 16px;
  border: 1.5px dashed #94a3b8;
  border-radius: var(--radius-md);
  background: #fafbfc;
  cursor: pointer;
  color: var(--text-secondary);
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.upload-zone:hover,
.upload-zone.is-dragover {
  background: var(--accent-soft);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

.upload-title {
  font-weight: 650;
  font-size: 1rem;
  color: var(--text-primary);
}

.upload-hint {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.image-preview-card {
  margin-top: 12px;
  padding: 12px;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  background: #f8fafc;
  display: flex;
  align-items: center;
  gap: 14px;
}

.image-preview-card img {
  width: 72px;
  height: 72px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
  background: #ffffff;
}

.image-preview-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  min-width: 0;
}

.image-name {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  word-break: break-all;
}

/* Error Alert */
.error-alert {
  margin-bottom: 16px;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: #991b1b;
  font-size: 0.98rem;
  font-weight: 550;
}

/* Primary Action Button */
.btn-primary {
  width: 100%;
  min-height: 52px;
  padding: 12px 20px;
  border: 0;
  border-radius: var(--radius-md);
  background: var(--accent-primary);
  color: #ffffff;
  font-size: 1.12rem;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: background-color 0.15s ease, opacity 0.15s ease;
}

.btn-primary:hover:not(:disabled) {
  background: var(--accent-primary-hover);
}

.btn-primary:disabled {
  opacity: 0.72;
  cursor: wait;
}

.btn-secondary {
  min-height: 44px;
  padding: 8px 14px;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  background: #ffffff;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
}

.spinner {
  width: 19px;
  height: 19px;
  border: 2.5px solid rgba(255, 255, 255, 0.35);
  border-top-color: #ffffff;
  border-radius: 50%;
  animation: spin 0.75s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* Results Stack */
.results-stack {
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

/* Verdict Banner */
.verdict-banner {
  border-radius: var(--radius-lg);
  padding: 22px 20px;
  box-shadow: var(--shadow-card);
}

@media (min-width: 600px) {
  .verdict-banner {
    padding: 26px 26px;
  }
}

.verdict-banner.verdict--red {
  background-color: var(--verdict-red-bg);
  color: var(--verdict-red-text);
}

.verdict-banner.verdict--amber {
  background-color: var(--verdict-amber-bg);
  border: 1px solid var(--verdict-amber-border);
  color: var(--verdict-amber-text);
}

.verdict-banner.verdict--grey {
  background-color: var(--verdict-grey-bg);
  color: var(--verdict-grey-text);
}

.verdict-top {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.verdict-icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.18);
  margin-top: 2px;
}

.verdict--amber .verdict-icon {
  background: rgba(59, 24, 4, 0.12);
}

.verdict-heading-wrap {
  flex: 1;
  min-width: 0;
}

.verdict-meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 6px;
}

.verdict-canonical-pill,
.lang-detected-pill {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 700;
  padding: 2px 10px;
  border-radius: 999px;
  background: var(--verdict-red-pill);
  letter-spacing: 0.01em;
}

.verdict--amber .verdict-canonical-pill,
.verdict--amber .lang-detected-pill {
  background: var(--verdict-amber-pill);
}

.verdict--grey .verdict-canonical-pill,
.verdict--grey .lang-detected-pill {
  background: var(--verdict-grey-pill);
}

.verdict-title {
  margin: 0;
  font-size: 1.55rem;
  line-height: 1.25;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.verdict-summary {
  margin: 12px 0 0;
  font-size: 1.06rem;
  line-height: 1.55;
  opacity: 0.96;
}

/* Message Review & Interactive Highlights */
.section-header h3,
.info-card h3,
.safe-steps-card h3 {
  margin: 0 0 6px;
  font-size: 1.22rem;
  line-height: 1.3;
  font-weight: 750;
  color: var(--text-primary);
}

.section-hint {
  margin: 0 0 14px;
  font-size: 0.96rem;
  color: var(--text-secondary);
}

.highlighted-message-box {
  padding: 16px;
  border-radius: var(--radius-md);
  background: #f8fafc;
  border: 1px solid var(--border-light);
  font-size: 1.08rem;
  line-height: 1.85;
  white-space: pre-wrap;
  word-break: break-word;
  color: var(--text-primary);
}

.phrase-highlight {
  appearance: none;
  -webkit-appearance: none;
  display: inline;
  font: inherit;
  line-height: 1.45;
  color: var(--hl-text);
  background-color: var(--hl-bg);
  border: 0;
  border-bottom: 2.5px solid var(--hl-border);
  border-radius: 5px;
  padding: 2px 6px;
  margin: 0 1px;
  cursor: pointer;
  text-align: left;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
  transition: background-color 0.15s ease, box-shadow 0.15s ease;
}

.phrase-highlight:hover {
  background-color: var(--hl-active-bg);
}

.phrase-highlight.is-active {
  background-color: var(--hl-active-bg);
  border-bottom-color: var(--hl-active-ring);
  box-shadow: 0 0 0 2px var(--hl-active-ring);
  font-weight: 600;
}

.phrase-badge-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  margin-left: 5px;
  border-radius: 999px;
  background: #854d0e;
  color: #ffffff;
  font-size: 0.74rem;
  font-weight: 700;
  vertical-align: middle;
}

.phrase-highlight.is-active .phrase-badge-num {
  background: var(--hl-active-ring);
}

/* Flag Reason Panel */
.flag-reason-panel {
  margin-top: 14px;
  padding: 16px;
  border-radius: var(--radius-md);
  background: #fffbeb;
  border: 1.5px solid #f59e0b;
}

.flag-reason-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
}

.category-badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  background: #fef3c7;
  border: 1px solid #d97706;
  color: #78350f;
  font-size: 0.85rem;
  font-weight: 700;
}

.close-reason-btn {
  background: #ffffff;
  border: 1px solid #d97706;
  color: #78350f;
  border-radius: 6px;
  padding: 5px 10px;
  font-size: 0.85rem;
  font-weight: 650;
  cursor: pointer;
  min-height: 34px;
}

.flag-quote {
  margin: 0 0 8px;
  padding: 6px 10px;
  border-left: 3px solid #d97706;
  background: rgba(255, 255, 255, 0.7);
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--text-primary);
}

.flag-reason-text {
  margin: 0;
  font-size: 1.04rem;
  line-height: 1.55;
  color: var(--text-primary);
}

/* Unmatched Flags */
.unmatched-flags-wrap {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--border-light);
}

.unmatched-heading {
  margin: 0 0 10px;
  font-size: 0.96rem;
  font-weight: 700;
  color: var(--text-secondary);
}

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

.unmatched-chip {
  min-height: 40px;
  padding: 7px 12px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--hl-border);
  background: var(--hl-bg);
  color: var(--hl-text);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
}

.unmatched-chip.is-active {
  border-color: var(--hl-active-ring);
  box-shadow: 0 0 0 2px var(--hl-active-ring);
}

/* What Real Support Never Does */
.never-does-list {
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.never-does-list li {
  position: relative;
  padding-left: 30px;
  font-size: 1.05rem;
  line-height: 1.55;
  color: var(--text-primary);
}

.never-does-list li::before {
  content: "✕";
  position: absolute;
  left: 0;
  top: 2px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #fee2e2;
  color: #b91c1c;
  font-size: 0.78rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* How to Check Safely Card */
.safe-steps-card {
  border-color: #bfdbfe;
  background: #f8fbff;
}

.safe-steps-list {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: safe-step;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.safe-steps-list li {
  counter-increment: safe-step;
  display: flex;
  align-items: flex-start;
  gap: 14px;
  font-size: 1.06rem;
  line-height: 1.55;
  color: var(--text-primary);
}

.safe-steps-list li::before {
  content: counter(safe-step);
  flex-shrink: 0;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--accent-primary);
  color: #ffffff;
  font-size: 0.94rem;
  font-weight: 750;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: 1px;
}

/* Footer */
.site-footer {
  margin-top: 32px;
  padding-top: 18px;
  border-top: 1px solid var(--border-light);
  text-align: center;
}

.site-footer p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

/* ===== Mock inbox (sample messages) ===== */
.mock-inbox {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.sample-btn.inbox-row {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  text-align: left;
  padding: 10px 12px;
}

.inbox-avatar {
  flex: 0 0 auto;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent-primary);
  font-weight: 700;
  font-size: 0.8rem;
  display: grid;
  place-items: center;
}

.inbox-text {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.inbox-name {
  font-weight: 700;
  font-size: 0.92rem;
  color: var(--text-primary);
}

.inbox-tag {
  font-style: normal;
  font-weight: 600;
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-left: 6px;
}

.inbox-preview {
  font-weight: 400;
  font-size: 0.82rem;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ===== Traffic-light dots (red / yellow / grey – never green) ===== */
.traffic-dot {
  flex: 0 0 auto;
  display: inline-block;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px solid transparent;
  padding: 0;
}

.traffic-dot--lg {
  width: 34px;
  height: 34px;
  cursor: pointer;
  border-width: 3px;
  box-shadow: 0 0 0 4px rgba(15, 23, 42, 0.06);
  transition: transform 0.15s ease;
}

.traffic-dot--lg:hover {
  transform: scale(1.08);
}

.traffic-dot--lg:focus-visible {
  outline: 3px solid var(--border-focus);
  outline-offset: 3px;
}

.dot--unchecked {
  background: transparent;
  border-color: var(--border-light);
}

.dot--red {
  background: #dc2626;
  border-color: #991b1b;
  box-shadow: 0 0 0 4px rgba(220, 38, 38, 0.18);
}

.dot--yellow {
  background: #facc15;
  border-color: #ca8a04;
  box-shadow: 0 0 0 4px rgba(250, 204, 21, 0.25);
}

.dot--grey {
  background: #94a3b8;
  border-color: #475569;
  box-shadow: 0 0 0 4px rgba(148, 163, 184, 0.25);
}

/* ===== Chat-style result ===== */
.chat-thread {
  background: #e9eef2;
  border-radius: var(--radius-md);
  padding: 14px;
  margin-bottom: 12px;
}

.chat-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.chat-bubble {
  flex: 1 1 auto;
  min-width: 0;
  background: var(--bg-surface);
  border-radius: 4px 16px 16px 16px;
  padding: 10px 14px 8px;
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.08);
}

.chat-bubble .highlighted-message-box {
  border: none;
  background: transparent;
  padding: 0;
  margin: 0;
}

.chat-sender {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--accent-primary);
  margin-bottom: 4px;
}

.chat-meta {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-align: right;
  margin-top: 6px;
}

.chat-dot-hint {
  margin: 8px 0 0;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ===== Camera + QR ===== */
.camera-btn {
  margin-top: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  min-height: 48px;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  background: var(--bg-surface);
  color: var(--accent-primary);
  font-weight: 700;
  cursor: pointer;
}

.camera-btn:hover {
  background: var(--accent-soft);
}

.qr-note {
  margin: 6px 0 0;
  font-size: 0.85rem;
  font-weight: 600;
  color: #92400e;
  background: #fef3c7;
  border-radius: var(--radius-sm);
  padding: 6px 10px;
  word-break: break-all;
}

.qr-result-box {
  margin-top: 14px;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  background: #fef3c7;
  border: 1px solid #f59e0b;
}

.qr-url {
  display: block;
  font-size: 0.9rem;
  word-break: break-all;
  user-select: all;
}

.qr-result-hint {
  margin: 6px 0 0;
  font-size: 0.8rem;
  color: #92400e;
}

.demo-note {
  margin: 10px 0 0;
  font-size: 0.82rem;
  font-weight: 600;
  opacity: 0.9;
}