:root {
  /* Brand palette */
  --color-primary: #0a2540;
  --color-primary-dark: #061a32;
  --color-accent: #f7941d;
  --color-accent-hover: #d97a08;
  
  --color-neutral: #f5f7fa;
  --color-surface: #ffffff;
  --color-text: #0f172a;
  --color-muted: #64748b;
  --color-border: #e2e8f0;
  
  --color-success-bg: #dcfce7;
  --color-success-text: #166534;
  --color-error-bg: #fee2e2;
  --color-error-text: #991b1b;
  --color-info-bg: #e0f2fe;
  --color-info-text: #075985;

  --color-bg: var(--color-neutral);
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-primary: #1e293b;
    --color-primary-dark: #0f172a;
    --color-accent: #f7941d;
    --color-accent-hover: #d97a08;
    
    --color-neutral: #0f172a;
    --color-surface: #1e293b;
    --color-text: #f8fafc;
    --color-muted: #94a3b8;
    --color-border: #334155;
    
    --color-success-bg: #064e3b;
    --color-success-text: #6ee7b7;
    --color-error-bg: #7f1d1d;
    --color-error-text: #fca5a5;
    --color-info-bg: #0c4a6e;
    --color-info-text: #7dd3fc;
    
    --color-bg: var(--color-neutral);
  }
}

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

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

[hidden] {
  display: none !important;
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 4px;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Site Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-primary);
  color: #ffffff;
}

.site-header__inner {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
}

.brand {
  display: flex;
  align-items: center;
  text-decoration: none;
  gap: 0.75rem;
}

.brand__mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background-color: var(--color-accent);
  color: #ffffff;
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.05em;
}

.brand__text {
  display: flex;
  flex-direction: column;
}

.brand__name {
  color: #ffffff;
  font-weight: 700;
  font-size: 1.1rem;
  line-height: 1.2;
}

.brand__tag {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.8rem;
}

.site-nav {
  display: flex;
  gap: 1.5rem;
}

.site-nav a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.15s ease;
}

.site-nav a:hover {
  color: #ffffff;
}

/* Hero */
.hero {
  width: 100%;
  background: linear-gradient(to right, #0a2540, #133a66);
  color: #ffffff;
  padding: 3rem 0;
}

.hero__title {
  margin: 0 0 0.5rem;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  line-height: 1.15;
}

.hero__lede {
  margin: 0 0 1.5rem;
  max-width: 60ch;
  color: rgba(255, 255, 255, 0.85);
  font-size: 1.1rem;
}

.hero__meta {
  display: flex;
  flex-direction: row;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.pill {
  text-transform: uppercase;
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  padding: 0.25rem 0.6rem;
  border-radius: 9999px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  color: rgba(255, 255, 255, 0.85);
  font-weight: 600;
}

.pill--accent {
  background-color: var(--color-accent);
  border: none;
  color: #ffffff;
}

/* Main Grid */
.main-grid {
  display: grid;
  gap: 1.5rem;
  margin-top: 2rem;
  margin-bottom: 3rem;
  grid-template-areas:
    "scanner settings"
    "results results"
    "raw raw";
  grid-template-columns: 1fr 1fr;
}

@media (max-width: 899px) {
  .main-grid {
    grid-template-areas:
      "scanner"
      "settings"
      "results"
      "raw";
    grid-template-columns: 1fr;
  }
}

.card--scanner { grid-area: scanner; }
.card--settings { grid-area: settings; }
.card--results { grid-area: results; }
.card--raw { grid-area: raw; }

/* Cards */
.card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 1.5rem;
  box-shadow: 0 1px 2px rgba(15,23,42,0.04), 0 4px 12px rgba(15,23,42,0.04);
}

.card__header {
  margin-bottom: 1rem;
}

.card__header h2 {
  margin: 0;
  font-size: 1.25rem;
  color: var(--color-primary);
  font-weight: 600;
}

.card__sub {
  margin: 0.25rem 0 0;
  font-size: 0.9rem;
  color: var(--color-muted);
}

/* Mode Switch */
.mode-switch {
  display: inline-flex;
  flex-direction: row;
  padding: 4px;
  background-color: var(--color-neutral);
  border-radius: 10px;
  gap: 4px;
  margin-bottom: 1rem;
}

.mode-switch__btn {
  appearance: none;
  font-family: inherit;
  padding: 0.5rem 1rem;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--color-muted);
  border: 0;
  background: transparent;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.mode-switch__btn:hover:not(.is-active) {
  color: var(--color-primary-dark);
  background-color: rgba(0, 0, 0, 0.04);
}

.mode-switch__btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 8px;
}

.mode-switch__btn.is-active {
  background-color: var(--color-accent);
  color: #ffffff;
  text-shadow: 0 1px 2px rgba(10, 37, 64, 0.5); /* Improves WCAG contrast for white text on light orange */
  box-shadow: 0 2px 4px rgba(247, 148, 29, 0.4);
}

/* Actions */
.actions {
  display: flex;
  flex-direction: row;
  gap: 0.75rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.upload-trigger {
  display: inline-flex;
}

.upload-trigger > .btn {
  pointer-events: none;
}

/* Buttons */
.btn {
  min-height: 44px;
  padding: 0.5rem 1.25rem;
  font-weight: 600;
  font-size: 1rem;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.15s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: none;
  font-family: inherit;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

.btn--primary {
  background-color: var(--color-accent);
  color: #ffffff;
}

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

@media (prefers-color-scheme: dark) {
  .mode-switch__btn:hover:not(.is-active) {
    color: var(--color-text);
    background-color: rgba(255, 255, 255, 0.05);
  }
  
  .mode-switch__btn:focus-visible {
    outline-color: #ffffff;
  }
  
  .mode-switch__btn.is-active {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.8);
  }
}

.btn--ghost {
  background-color: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
}

.btn--ghost:hover:not(:disabled) {
  background-color: var(--color-primary);
  color: #ffffff;
}

.btn--ghost.is-active {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: #ffffff;
}

/* Video Container */
.video-container {
  aspect-ratio: 4 / 3;
  background-color: #0f172a;
  border-radius: 12px;
  overflow: hidden;
  position: relative;
  box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1);
  margin-bottom: 1rem;
}

#preview {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.video-container__frame {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 72%;
  height: 34%;
  border: 2px solid rgba(247, 148, 29, 0.85);
  border-radius: 8px;
  pointer-events: none;
  background: rgba(247, 148, 29, 0.1);
  box-shadow: inset 0 0 0 9999px rgba(0, 0, 0, 0.2), 0 0 0 1px rgba(247, 148, 29, 0.35);
}

.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;
}

/* Status */
.status {
  padding: 0.75rem 1rem;
  border-radius: 8px;
  font-weight: 500;
  display: block;
}

.status:empty {
  display: none;
}

.status--info {
  background-color: var(--color-info-bg);
  color: var(--color-info-text);
}

.status--success {
  background-color: var(--color-success-bg);
  color: var(--color-success-text);
}

.status--error {
  background-color: var(--color-error-bg);
  color: var(--color-error-text);
}

/* Loading */
.loading {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-muted);
}

.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid var(--color-border);
  border-top: 2px solid var(--color-accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* Field */
.field {
  display: flex;
  flex-direction: column;
  margin-bottom: 1rem;
  position: relative;
}

.field label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-muted);
  margin-bottom: 0.35rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.field input {
  width: 100%;
  padding: 0.6rem 0.85rem;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-size: 1rem;
  background-color: var(--color-surface);
  color: var(--color-text);
  font-family: inherit;
  transition: all 0.2s;
}

.field:has(.link-btn) input {
  padding-right: 3.5rem;
}

.field input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(247, 148, 29, 0.18);
}

.link-btn {
  position: absolute;
  right: 0.5rem;
  bottom: 0.45rem;
  background: transparent;
  border: 0;
  color: var(--color-accent);
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  padding: 0.25rem 0.5rem;
}

.hint {
  font-size: 0.85rem;
  color: var(--color-muted);
  margin: 0.5rem 0 0;
}

/* Result List */
.result-list {
  display: grid;
  grid-template-columns: 1fr;
  row-gap: 0.5rem;
  column-gap: 1rem;
  margin: 0;
}

@media (min-width: 600px) {
  .result-list {
    grid-template-columns: 1fr 2fr;
  }
}

.result-list dt {
  font-weight: 600;
  color: var(--color-muted);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.result-list dd {
  margin: 0;
  font-size: 1rem;
  color: var(--color-text);
  word-break: break-word;
}

/* Raw Details */
.card--raw summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--color-primary);
  user-select: none;
}

.card--raw pre {
  background-color: var(--color-neutral);
  padding: 1rem;
  border-radius: 8px;
  font-size: 0.85rem;
  overflow: auto;
  white-space: pre-wrap;
  word-break: break-all;
  margin-top: 0.75rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

/* Site Footer */
.site-footer {
  background-color: var(--color-primary);
  color: #ffffff;
  padding: 2rem 0;
  font-size: 0.9rem;
}

.site-footer__inner {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  align-items: center;
  text-align: center;
}

.site-footer__meta {
  color: rgba(255, 255, 255, 0.6);
  margin: 0;
}