:root {
  color-scheme: dark;
  --color-primary: #2df8e6;
  --color-primary-hover: #70ff9c;
  --color-primary-glow: rgba(45, 248, 230, 0.18);
  --color-secondary: #7f8ca3;
  --color-success: #70ff9c;
  --color-warning: #ffcc66;
  --color-error: #ff6b7a;
  --color-info: #2df8e6;
  --color-bg: #090b10;
  --color-bg-alt: #111722;
  --color-bg-elevated: #1b2635;
  --color-border: rgba(148, 163, 184, 0.24);
  --color-border-light: rgba(148, 163, 184, 0.14);
  --color-text: #f7fafc;
  --color-text-muted: #a8b3c5;
  --color-text-dim: #6f7c90;
  --color-upca: #54a8ff;
  --color-upce: #b88cff;
  --color-ean13: #70ff9c;
  --color-ean8: #2df8e6;
  --color-code128: #ffcc66;
  --radius-md: 8px;
  --radius-lg: 8px;
  --radius-xl: 8px;
  --shadow-lg: 0 22px 70px rgba(0, 0, 0, 0.36);
  --shadow-xl: 0 28px 90px rgba(0, 0, 0, 0.46);
}

body {
  background:
    radial-gradient(circle at 14% -12%, rgba(45, 248, 230, 0.16), transparent 34rem),
    radial-gradient(circle at 92% 4%, rgba(184, 140, 255, 0.14), transparent 32rem),
    linear-gradient(180deg, #090b10 0%, #0d1118 48%, #090b10 100%);
}

main.container {
  display: grid;
  gap: 18px;
  padding-top: 24px;
}

.app-header {
  padding: 18px 0;
  background:
    linear-gradient(135deg, rgba(45, 248, 230, 0.08), rgba(184, 140, 255, 0.08)),
    rgba(17, 23, 34, 0.92);
  border-bottom-color: var(--color-border);
  box-shadow: 0 18px 56px rgba(0, 0, 0, 0.26);
}

.app-header .container {
  display: grid;
  gap: 14px;
}

.header-main {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand-link,
.header-nav,
.ops-status-strip,
.related-ops-links {
  display: flex;
  align-items: center;
}

.brand-link {
  min-width: 0;
  gap: 12px;
  color: inherit;
  text-decoration: none;
}

.brand-link:hover {
  text-decoration: none;
}

.brand-mark {
  width: 42px;
  height: 42px;
  flex: 0 0 42px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(45, 248, 230, 0.42);
  border-radius: var(--radius-lg);
  color: var(--color-primary);
  background:
    linear-gradient(135deg, rgba(45, 248, 230, 0.18), rgba(184, 140, 255, 0.16)),
    rgba(9, 11, 16, 0.72);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.04), 0 0 28px rgba(45, 248, 230, 0.2);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 800;
}

.app-kicker,
.section-kicker {
  display: block;
  margin: 0 0 4px;
  color: var(--color-primary);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.app-header h1 {
  margin: 0;
  font-size: clamp(1.55rem, 3vw, 2.35rem);
  letter-spacing: 0;
}

.app-header .tagline {
  display: block;
  max-width: 760px;
  color: var(--color-text-muted);
  font-size: 0.98rem;
}

.header-nav {
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 8px;
}

.header-nav a,
.header-nav .btn {
  min-height: 36px;
  padding: 0 12px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  color: var(--color-text-muted);
  background: rgba(9, 11, 16, 0.45);
  font-size: 0.86rem;
  font-weight: 800;
}

.header-nav a {
  display: inline-flex;
  align-items: center;
}

.header-nav a:hover,
.header-nav .btn:hover {
  color: var(--color-primary);
  border-color: rgba(45, 248, 230, 0.42);
  background: rgba(45, 248, 230, 0.1);
  text-decoration: none;
}

.app-header #help-btn {
  position: static;
  right: auto;
  top: auto;
  width: auto;
  margin-top: 0;
}

.ops-status-strip {
  flex-wrap: wrap;
  gap: 8px;
}

.ops-status-strip span,
.local-pill,
.trust-chip,
.scenario-count-chip {
  min-height: 32px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 0 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  color: var(--color-text-muted);
  background: rgba(9, 11, 16, 0.46);
  font-size: 0.82rem;
  font-weight: 750;
}

.ops-status-strip strong,
.local-pill,
.trust-chip strong {
  color: var(--color-primary);
}

.section,
.welcome-content,
.results-card,
.progress-container,
.related-ops-panel {
  border: 1px solid var(--color-border);
  background:
    linear-gradient(145deg, rgba(45, 248, 230, 0.045), rgba(184, 140, 255, 0.04)),
    rgba(17, 23, 34, 0.88);
  box-shadow: var(--shadow-lg);
}

.section {
  margin-bottom: 0;
}

.section-title-row {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: flex-start;
  margin-bottom: 22px;
}

.section-title-row h2,
.related-ops-panel h2 {
  margin-bottom: 8px;
  letter-spacing: 0;
}

.section-intro {
  max-width: 780px;
  margin: 0;
  color: var(--color-text-muted);
}

.local-pill {
  flex: 0 0 auto;
}

.welcome-content {
  position: relative;
  overflow: hidden;
  text-align: left;
  padding: 24px;
}

.welcome-content::after {
  content: "";
  position: absolute;
  inset: auto 24px 0 auto;
  width: 220px;
  height: 80px;
  pointer-events: none;
  opacity: 0.18;
  background: repeating-linear-gradient(
    90deg,
    var(--color-text) 0 4px,
    transparent 4px 9px,
    var(--color-text) 9px 12px,
    transparent 12px 18px
  );
  transform: skewX(-10deg);
}

.welcome-content h2 {
  max-width: 760px;
  margin-bottom: 8px;
  color: var(--color-text);
  font-size: clamp(1.7rem, 4vw, 3.3rem);
  letter-spacing: 0;
}

.welcome-content p {
  max-width: 760px;
  color: var(--color-text-muted);
}

.welcome-content ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 18px 0;
}

.welcome-content li {
  margin: 0;
  list-style: none;
}

.scenario-button,
.metric-item,
.scanner-info,
.learning-mode-container,
.table-filters,
.finding,
.issue-item,
.warning-item,
.radio-option,
.checksum-explanation {
  background: rgba(9, 11, 16, 0.48);
  border-color: var(--color-border);
}

.scenario-button {
  min-height: 116px;
  display: grid;
  align-content: space-between;
  gap: 8px;
}

.scenario-button:hover,
.radio-option:hover {
  transform: translateY(-2px);
  border-color: rgba(45, 248, 230, 0.48);
  background:
    linear-gradient(145deg, rgba(45, 248, 230, 0.1), rgba(184, 140, 255, 0.08)),
    rgba(9, 11, 16, 0.62);
  box-shadow: 0 0 0 3px var(--color-primary-glow), 0 18px 44px rgba(0, 0, 0, 0.28);
}

textarea.barcode-input,
select {
  background: rgba(5, 8, 12, 0.82);
  border-color: var(--color-border);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

textarea.barcode-input {
  min-height: 220px;
  line-height: 1.65;
}

.btn {
  border-radius: var(--radius-lg);
  font-weight: 800;
}

.btn-primary {
  color: #061014;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-hover));
  box-shadow: 0 18px 42px rgba(45, 248, 230, 0.18);
}

.btn-primary:hover:not(:disabled) {
  background: linear-gradient(135deg, var(--color-primary-hover), var(--color-primary));
}

.btn-secondary,
.btn-outline {
  border: 1px solid var(--color-border);
  background: rgba(9, 11, 16, 0.52);
}

.btn-secondary:hover:not(:disabled),
.btn-outline:hover:not(:disabled) {
  border-color: rgba(45, 248, 230, 0.42);
  background: rgba(45, 248, 230, 0.1);
}

.toggle-label {
  margin: 0;
}

.results-grid {
  gap: 16px;
}

.results-card h3,
.table-header {
  border-bottom-color: var(--color-border-light);
}

.grade-circle {
  background: rgba(9, 11, 16, 0.62);
}

.distribution-bar-container,
.progress-bar-bg,
.score-meter {
  background: rgba(255, 255, 255, 0.07);
}

.table-container {
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
}

.results-table th {
  background: #151f2b;
}

.results-table tbody tr:last-child td {
  border-bottom: 0;
}

.results-table tr:hover td,
.results-table tr.clickable:hover td {
  background: rgba(45, 248, 230, 0.065);
}

.related-ops-panel {
  display: grid;
  grid-template-columns: minmax(0, 0.7fr) minmax(0, 1fr);
  gap: 18px;
  align-items: center;
  padding: 22px;
  border-radius: var(--radius-lg);
}

.related-ops-links {
  gap: 10px;
}

.related-ops-links a {
  flex: 1 1 0;
  min-height: 92px;
  display: grid;
  align-content: center;
  gap: 4px;
  padding: 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  color: var(--color-text);
  background: rgba(9, 11, 16, 0.48);
}

.related-ops-links a:hover {
  border-color: rgba(45, 248, 230, 0.42);
  background: rgba(45, 248, 230, 0.1);
  text-decoration: none;
  transform: translateY(-1px);
}

.related-ops-links span {
  color: var(--color-text-muted);
  font-size: 0.86rem;
}

.app-footer {
  margin-top: 20px;
  background: transparent;
}

.privacy-note {
  color: var(--color-text-muted);
}

.privacy-note strong {
  color: var(--color-success);
}

.modal {
  background:
    linear-gradient(145deg, rgba(45, 248, 230, 0.045), rgba(184, 140, 255, 0.04)),
    var(--color-bg-alt);
}

@media (max-width: 820px) {
  .header-main,
  .section-title-row,
  .related-ops-panel {
    grid-template-columns: 1fr;
    flex-direction: column;
    align-items: stretch;
  }

  .header-nav {
    justify-content: flex-start;
  }

  .related-ops-panel {
    display: grid;
  }

  .related-ops-links {
    flex-direction: column;
    align-items: stretch;
  }
}

@media (max-width: 576px) {
  main.container {
    gap: 14px;
    padding-top: 16px;
  }

  .app-header {
    padding: 14px 0;
  }

  .brand-mark {
    width: 36px;
    height: 36px;
    flex-basis: 36px;
  }

  .app-kicker,
  .section-kicker {
    font-size: 0.64rem;
  }

  .app-header h1 {
    font-size: 1.55rem;
  }

  .app-header .tagline {
    font-size: 0.86rem;
  }

  .header-nav {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 7px;
  }

  .header-nav a,
  .header-nav .btn {
    justify-content: center;
    padding: 0 8px;
    font-size: 0.75rem;
  }

  .ops-status-strip {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .ops-status-strip span {
    justify-content: center;
    min-width: 0;
    font-size: 0.76rem;
  }

  .section,
  .welcome-content,
  .results-card,
  .related-ops-panel {
    padding: 16px;
  }

  .welcome-content h2 {
    font-size: 1.9rem;
  }

  .welcome-content::after {
    display: none;
  }

  .welcome-content ul {
    display: grid;
    gap: 7px;
  }

  textarea.barcode-input {
    min-height: 170px;
  }

  .button-group {
    gap: 9px;
  }

  .related-ops-links a {
    min-height: 78px;
  }
}