/* check.css — /check upload-and-compare page
 *
 * Warm cream consumer register (matches the homepage + verify landing). The
 * verify portal is public-facing, so it reads friendly and light. All colors
 * flow through :root tokens; token NAMES are preserved from the prior dark
 * build so the markup and check.js are untouched — only the values changed.
 *
 * Usage rules kept: oxblood = brand/provenance only; verified teal = success
 * state only; caution amber + failure red carry the warn/fail signals.
 */

:root {
  /* Brand — oxblood */
  --brand-primary: #6E1F28;
  --brand-emphasis: #7A2230;
  --brand-gradient: linear-gradient(135deg, #7A2230 0%, #6E1F28 100%);

  /* Surfaces — warm cream + paper */
  --bg-page: #F7F2E9;
  --bg-card: #FFFFFF;
  --bg-input: #FBF7F0;
  --bg-input-active: #FFFFFF;
  --bg-signal-neutral: #FBF7F0;
  --bg-signal-pass: #FFFFFF;        /* status comes from border, not bg */
  --bg-signal-warn: #FFFFFF;
  --bg-signal-fail: #FFFFFF;

  /* Foreground — warm ink scale */
  --fg-primary: #241A1C;
  --fg-secondary: #6E635E;
  --fg-tertiary: #9B9089;
  --fg-quaternary: #A89F95;
  --fg-on-brand: #FFFFFF;

  /* Borders */
  --border-default: #E7DDCE;
  --border-strong: #D8CCB8;

  /* Status — semantic only (never brand). */
  --status-verified: #1B8A6B;        /* verified teal */
  --status-caution:  #B7791F;        /* amber */
  --status-failure:  #C0392B;        /* red */
  --status-neutral:  #9B9089;

  --border-pass:    var(--status-verified);
  --border-warn:    var(--status-caution);
  --border-fail:    var(--status-failure);
  --border-neutral: var(--status-neutral);

  /* Decision-banner backgrounds — soft status tints on light; border + icon carry weight. */
  --banner-verified-bg:   rgba(27,138,107,0.08);
  --banner-warning-bg:    rgba(183,121,31,0.09);
  --banner-likely-bg:     #FBF7F0;
  --banner-unverified-bg: rgba(192,57,43,0.07);

  /* Media-type badges — neutral chips */
  --badge-photo-bg: #EFE7D8;
  --badge-photo-fg: var(--fg-secondary);
  --badge-video-bg: #EFE7D8;
  --badge-video-fg: var(--fg-secondary);

  /* Light "paper" surfaces (token names kept from the glass build) */
  --glass-card-gradient:   linear-gradient(180deg, #FFFFFF 0%, #FBF7F0 100%);
  --glass-card-border:     1px solid #E7DDCE;
  --glass-card-highlight:  inset 0 1px 0 rgba(255,255,255,0.7);
  --glass-nested-gradient: linear-gradient(180deg, #FBF7F0 0%, #F4ECDD 100%);
  --glass-nested-highlight: inset 0 1px 0 rgba(255,255,255,0.6);

  /* Geometry */
  --radius-card: 18px;
  --radius-input: 11px;
  --radius-pill: 12px;
  --shadow-card: 0 14px 40px rgba(74, 42, 30, 0.12);
  --shadow-button: 0 6px 16px rgba(110, 31, 40, 0.24);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen,
               Ubuntu, Cantarell, sans-serif;
  background:
    radial-gradient(1100px 620px at 92% -8%, rgba(195,154,82,0.16) 0%, transparent 60%),
    radial-gradient(900px 600px at 2% 4%, rgba(122,34,48,0.07) 0%, transparent 58%),
    var(--bg-page);
  background-attachment: fixed;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  color: var(--fg-primary);
  line-height: 1.5;
}

.container {
  background: var(--glass-card-gradient);
  border: var(--glass-card-border);
  border-radius: var(--radius-card);
  box-shadow: var(--glass-card-highlight), var(--shadow-card);
  max-width: 700px;
  width: 100%;
  padding: 40px;
}

/* Header */
.logo {
  text-align: center;
  margin-bottom: 30px;
}
.logo-mark {
  display: block;
  width: 72px;
  height: 72px;
  margin: 0 auto 12px;
}
.logo h1 {
  font-family: 'Fraunces', Georgia, 'Times New Roman', serif;
  font-size: 44px;
  font-weight: 600;
  letter-spacing: -0.025em;
  color: var(--brand-primary);
  margin-bottom: 12px;
}
.logo .tagline {
  color: var(--fg-tertiary);
  font-size: 14px;
}

/* Steps */
.step { margin-bottom: 30px; }
.step-header {
  display: flex;
  align-items: center;
  margin-bottom: 15px;
}
.step-number {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--brand-gradient);
  color: var(--fg-on-brand);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  margin-right: 12px;
  font-size: 14px;
}
.step-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--fg-primary);
}
.step-title .optional {
  color: var(--fg-quaternary);
  font-weight: 400;
  font-size: 15px;
  margin-left: 4px;
}

.input-group { margin-bottom: 15px; }

input[type="text"] {
  width: 100%;
  padding: 12px;
  border: 2px solid var(--border-strong);
  border-radius: var(--radius-input);
  font-size: 15px;
  transition: border-color 0.3s;
  font-family: inherit;
  color: var(--fg-primary);
  background: var(--bg-card);
}
input[type="text"]:focus {
  outline: none;
  border-color: var(--status-verified);
  box-shadow: 0 0 0 3px rgba(27,138,107,0.18);
}

/* Drop zone (file picker + drag-drop) */
.dropzone {
  position: relative;
  display: block;
  width: 100%;
}
.dropzone-label {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 28px 12px;
  border: 2px dashed var(--border-strong);
  border-radius: var(--radius-input);
  text-align: center;
  cursor: pointer;
  transition: all 0.25s;
  background: var(--glass-nested-gradient);
  box-shadow: var(--glass-nested-highlight);
  gap: 4px;
}
.dropzone-primary {
  font-size: 16px;
  font-weight: 500;
  color: var(--fg-secondary);
}
.dropzone-secondary {
  font-size: 14px;
  color: var(--fg-quaternary);
}
.dropzone-label:hover {
  border-color: var(--brand-primary);
  background: #FFFFFF;
}
.dropzone-label.has-file {
  border-color: var(--brand-primary);
  color: var(--brand-primary);
  background: #FFFFFF;
}
.dropzone-label.has-file .dropzone-primary { color: var(--brand-primary); }
.dropzone-label.has-video {
  border-color: var(--badge-video-fg);
  background: #FFFFFF;
}
.dropzone-label.has-video .dropzone-primary { color: var(--badge-video-fg); }
.dropzone.drag-active .dropzone-label {
  border-color: var(--brand-primary);
  background: #FFFFFF;
  transform: scale(1.01);
}

/* Submit button */
.btn-primary {
  width: 100%;
  padding: 14px;
  border: none;
  border-radius: var(--radius-input);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
  background: var(--brand-gradient);
  color: var(--fg-on-brand);
  font-family: inherit;
  box-shadow: var(--shadow-button);
}
.btn-primary:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(110,31,40,0.32);
}
.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.help-text {
  font-size: 13px;
  color: var(--fg-quaternary);
  margin-top: 8px;
}

.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;
}

/* Loading spinner */
.loading {
  text-align: center;
  padding: 20px;
}
.loading[hidden] { display: none; }
.spinner {
  border: 4px solid var(--border-default);
  border-top: 4px solid var(--brand-primary);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  animation: spin 1s linear infinite;
  margin: 0 auto 15px;
}
@keyframes spin {
  0%   { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Decision banner */
.decision-banner {
  padding: 20px;
  border-radius: var(--radius-pill);
  margin-top: 20px;
  animation: fadeIn 0.5s;
}
.decision-banner[hidden] { display: none; }
.decision-banner.verified {
  background: var(--banner-verified-bg);
  border: 2px solid var(--border-pass);
}
.decision-banner.warning,
.decision-banner.caveats {
  background: var(--banner-warning-bg);
  border: 2px solid var(--border-warn);
}
.decision-banner.caveats .banner-title { color: var(--status-caution); }
.decision-banner.likely {
  background: var(--banner-likely-bg);
  border: 2px solid var(--status-neutral);
}
.decision-banner.unverified {
  background: var(--banner-unverified-bg);
  border: 2px solid var(--border-fail);
}
.banner-icon {
  font-size: 48px;
  text-align: center;
  margin-bottom: 10px;
}
.banner-title {
  font-size: 24px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 8px;
  color: var(--fg-primary);
}
.banner-message {
  text-align: center;
  color: var(--fg-secondary);
  font-size: 15px;
}
.banner-hint {
  text-align: center;
  color: var(--fg-tertiary);
  font-size: 13px;
  font-style: italic;
  margin-top: 10px;
  line-height: 1.5;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}

/* 4-Signal grid */
.signals-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 15px;
  margin-top: 20px;
}
.signals-grid[hidden] { display: none; }
.signal-card {
  background: var(--glass-nested-gradient);
  border-radius: var(--radius-input);
  padding: 15px;
  border: 1px solid var(--border-default);
  box-shadow: var(--glass-nested-highlight);
}
.signal-card.pass    { border-color: var(--border-pass); background: var(--bg-signal-pass); }
.signal-card.fail    { border-color: var(--border-fail); background: var(--bg-signal-fail); }
.signal-card.warn    { border-color: var(--border-warn); background: var(--bg-signal-warn); }
.signal-card.neutral { border-color: var(--border-neutral); background: var(--bg-signal-neutral); }
.signal-header {
  display: flex;
  align-items: center;
  margin-bottom: 8px;
}
.signal-icon {
  font-size: 20px;
  margin-right: 8px;
}
.signal-title {
  font-weight: 600;
  font-size: 15px;
  color: var(--fg-primary);
}
.signal-value {
  font-size: 14px;
  color: var(--fg-tertiary);
}
.signal-headline {
  display: block;
  font-weight: 600;
  font-size: 15px;
  color: var(--fg-primary);
  line-height: 1.3;
}
.signal-detail {
  display: block;
  margin-top: 4px;
  font-size: 13px;
  color: var(--fg-tertiary);
  line-height: 1.45;
}
.signal-value .mono {
  font-family: 'SF Mono', 'JetBrains Mono', 'Courier New', monospace;
  font-size: 12px;
  word-break: break-all;
}
.signal-subtext {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  color: var(--fg-quaternary);
}

/* Physics Evidence */
.physics-evidence {
  margin-top: 20px;
}
.physics-evidence[hidden] { display: none; }
.physics-evidence .section-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--fg-tertiary);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 12px;
}
.evidence-list {
  display: grid;
  grid-template-columns: minmax(140px, max-content) 1fr;
  column-gap: 16px;
  row-gap: 10px;
  margin: 0;
  padding: 0;
}
.evidence-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--fg-tertiary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin: 0;
  padding-top: 2px;
}
.evidence-value {
  margin: 0;
  padding: 0;
  font-size: 15px;
  color: var(--fg-primary);
  line-height: 1.45;
}
.evidence-value-primary { display: block; }
.evidence-value-qualifier {
  display: block;
  margin-top: 2px;
  font-size: 13px;
  font-style: italic;
  color: var(--fg-tertiary);
}
@media (max-width: 600px) {
  .evidence-list {
    grid-template-columns: 1fr;
    row-gap: 14px;
  }
  .evidence-label {
    margin-bottom: -4px;
  }
}

/* Side-by-side comparison */
.comparison-section { margin-top: 20px; }
.comparison-section[hidden] { display: none; }
.comparison-title {
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--fg-primary);
  font-size: 16px;
}
.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.comparison-section.upload-only .comparison-grid { grid-template-columns: minmax(0, 480px); justify-content: center; }
.comparison-section.upload-only .comparison-item:first-child { display: none; }
.comparison-item { text-align: center; }
.comparison-media {
  position: relative;
}
.comparison-media img,
.comparison-media video {
  max-width: 100%;
  border-radius: 8px;
  border: 2px solid var(--border-default);
  display: block;
}
.diff-overlay {
  position: absolute;
  inset: 2px;
  display: grid;
  border-radius: 6px;
  overflow: hidden;
  pointer-events: none;
}
.diff-cell { background: transparent; }
.diff-cell.modified {
  background: rgba(183, 121, 31, 0.20);
  outline: 2px solid var(--status-caution);
  outline-offset: -2px;
  pointer-events: auto;
}
.diff-cell.modified-strong {
  background: rgba(192, 57, 43, 0.26);
  outline: 2px solid var(--status-failure);
  outline-offset: -2px;
  pointer-events: auto;
}
.regional-summary {
  text-align: center;
  font-size: 13px;
  margin: 8px 0 12px;
  color: var(--fg-secondary);
}
.regional-summary[hidden] { display: none; }
.regional-summary.pass { color: var(--status-verified); }
.regional-summary.warn { color: var(--status-caution); }
.comparison-media .placeholder {
  padding: 40px 16px;
  background: var(--bg-signal-neutral);
  border-radius: 8px;
  color: var(--fg-quaternary);
  font-size: 14px;
}
.comparison-label {
  font-size: 13px;
  color: var(--fg-tertiary);
  margin-top: 5px;
}

/* Media-type badge */
.media-type-badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 600;
  margin-left: 8px;
}
.media-type-badge.photo { background: var(--badge-photo-bg); color: var(--badge-photo-fg); }
.media-type-badge.video { background: var(--badge-video-bg); color: var(--badge-video-fg); }

/* Footer */
.footer-nav{display:flex;flex-wrap:wrap;justify-content:center;gap:8px 20px;margin-bottom:14px;}
.footer-nav a{font-size:13px;color:var(--fg-tertiary);text-decoration:none;}
.footer-nav a:hover{color:var(--brand-primary);text-decoration:underline;}
.page-footer {
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid var(--border-default);
  text-align: center;
}
.authority-note {
  font-size: 13px;
  color: var(--fg-quaternary);
  font-style: italic;
  margin-bottom: 8px;
  line-height: 1.55;
}
.brand {
  font-size: 13px;
  color: var(--fg-quaternary);
}
.brand a {
  color: var(--fg-tertiary);
  text-decoration: none;
}
.brand a:hover { text-decoration: underline; }

/* Responsive */
@media (max-width: 600px) {
  .container { padding: 30px 20px; }
  .logo h1 { font-size: 38px; }
  .signals-grid { grid-template-columns: 1fr; }
  .comparison-grid { grid-template-columns: 1fr; }
}