/* CheckThisQR — checkpoint / stamp design system */

:root {
  --paper: #F2F3EF;
  --paper-2: #E8E9E3;
  --ink: #151A23;
  --ink-dim: #4B5563;
  --ink-faint: #8A9099;
  --teal: #00C2B8;
  --teal-dark: #009489;
  --safe: #1F7A5C;
  --safe-bg: #E3F3EC;
  --caution: #B9760F;
  --caution-bg: #FBF0DD;
  --danger: #B23B3B;
  --danger-bg: #FBE7E7;
  --line: rgba(21, 26, 35, 0.12);
  --radius: 15px;
  --mono: "JetBrains Mono", "SF Mono", ui-monospace, Menlo, Consolas, monospace;
  --sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --grotesk: "Space Grotesk", var(--sans);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}

body {
  background: var(--paper);
}

.wrap {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px;
}

a { color: var(--teal-dark); }

/* ---------- header ---------- */

.site-header {
  padding: 36px 0;
  border-bottom: 1px solid var(--line);
  background: var(--paper);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-family: var(--mono);
  font-weight: 700;
  font-size: 36px;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo .dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 0 4px rgba(0, 194, 184, 0.18);
}

.site-header nav {
  display: flex;
  align-items: center;
  gap: 30px;
}

.site-header nav a {
  font-size: 21px;
  color: var(--ink-dim);
  text-decoration: none;
}

.site-header nav a:hover { color: var(--ink); }

/* ---------- Learn dropdown ---------- */

.nav-dropdown {
  position: relative;
  padding-bottom: 10px; /* visual gap that stays inside the hoverable area */
  margin-bottom: -10px; /* cancels the padding's effect on flex alignment */
}

.nav-dropdown-trigger {
  font-family: var(--sans);
  font-size: 21px;
  color: var(--ink-dim);
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-dropdown-trigger:hover { color: var(--ink); }

.nav-dropdown-trigger::after {
  content: "▾";
  font-size: 1.1em;
  font-weight: 700;
  line-height: 1;
}

.nav-dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  margin-top: 0;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 8px;
  min-width: 240px;
  box-shadow: 0 8px 24px rgba(21,26,35,0.08);
  z-index: 20;
}

.nav-dropdown-menu a {
  display: block;
  padding: 9px 12px;
  border-radius: 6px;
  font-size: 15px;
  white-space: nowrap;
}

.nav-dropdown-menu a:hover { background: var(--paper-2); }

.nav-dropdown.open .nav-dropdown-menu {
  display: block;
}

/* ---------- hamburger toggle (mobile only) ---------- */

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 34px;
  height: 34px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.nav-toggle span {
  display: block;
  width: 100%;
  height: 2.5px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform .15s, opacity .15s;
}

.nav-toggle.active span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

/* ---------- hero ---------- */

.hero {
  padding: 32px 0 20px;
  text-align: center;
}

.eyebrow {
  font-family: var(--mono);
  font-size: 18px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 0 0 14px;
}

.hero h1 {
  font-family: var(--grotesk);
  font-size: clamp(45px, 6vw, 63px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: 0 0 14px;
}

.hero p {
  font-size: 24px;
  line-height: 1.6;
  color: var(--ink-dim);
  max-width: 46ch;
  margin: 0 auto;
}

/* ---------- checkpoint / scan bay ---------- */

.checkpoint {
  position: relative;
  margin: 20px 0;
  border: 1.5px dashed var(--ink-faint);
  border-radius: var(--radius);
  background: rgba(255,255,255,0.55);
  padding: 28px 20px;
  text-align: center;
  transition: border-color .15s, background .15s;
  overflow: hidden;
}

.checkpoint.drag-over {
  border-color: var(--teal-dark);
  background: rgba(0, 194, 184, 0.06);
}

.checkpoint .bay-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 12px;
  color: var(--ink-faint);
}

.checkpoint h2 {
  font-family: var(--grotesk);
  font-size: 30px;
  margin: 0 0 6px;
}

.checkpoint .sub {
  font-size: 21px;
  color: var(--ink-dim);
  margin: 0 0 20px;
}

.checkpoint-actions {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  font-family: var(--sans);
  font-weight: 600;
  font-size: 21px;
  border: none;
  border-radius: 7px;
  padding: 17px 30px;
  cursor: pointer;
  transition: transform .08s ease, box-shadow .15s ease;
}

.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--ink);
  color: var(--paper);
}

.btn-primary:hover { box-shadow: 0 4px 14px rgba(21,26,35,0.25); }

.btn-secondary {
  background: transparent;
  color: var(--ink);
  border: 1.5px solid var(--line);
}

.btn-secondary:hover { border-color: var(--ink-faint); }

#file-input, #camera-input { display: none; }

.camera-view {
  display: none;
  position: relative;
  width: 100%;
  max-width: 320px;
  margin: 0 auto 16px;
  border-radius: 10px;
  overflow: hidden;
  background: #000;
}

.camera-view.active { display: block; }

.camera-view video {
  width: 100%;
  display: block;
}

.camera-frame {
  position: absolute;
  top: 14%;
  left: 14%;
  right: 14%;
  bottom: 14%;
  border: 2px solid var(--teal);
  border-radius: 8px;
  pointer-events: none;
  box-shadow: 0 0 0 9999px rgba(0,0,0,0.4);
}

.camera-cancel { display: none; margin-top: 4px; }
.camera-cancel.active { display: inline-block; }

/* scan-line sweep, shown while analyzing */

.scan-preview {
  position: relative;
  width: 270px;
  height: 270px;
  margin: 0 auto 20px;
  border-radius: 8px;
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
  display: none;
}

.scan-preview.active { display: block; }

.scan-preview img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.scan-line {
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--teal), transparent);
  box-shadow: 0 0 8px 1px var(--teal);
  animation: sweep 1.4s ease-in-out infinite;
}

@keyframes sweep {
  0%   { top: 4%; opacity: .2; }
  50%  { top: 96%; opacity: 1; }
  100% { top: 4%; opacity: .2; }
}

@media (prefers-reduced-motion: reduce) {
  .scan-line { animation: none; top: 50%; opacity: .7; }
}

.status-line {
  font-family: var(--mono);
  font-size: 19.5px;
  color: var(--ink-dim);
  margin-top: 14px;
  min-height: 18px;
}

/* ---------- verdict stamp ---------- */

.result {
  display: none;
  margin: 28px 0;
}

.result.show { display: block; }

.stamp {
  display: inline-block;
  font-family: var(--mono);
  font-weight: 700;
  font-size: 22.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 15px 27px;
  border: 3px solid currentColor;
  border-radius: 6px;
  transform: rotate(-2.5deg);
  margin-bottom: 16px;
}

.stamp.safe { color: var(--safe); background: var(--safe-bg); }
.stamp.caution { color: var(--caution); background: var(--caution-bg); }
.stamp.danger { color: var(--danger); background: var(--danger-bg); }
.stamp.unknown { color: var(--ink-dim); background: var(--paper-2); }

.result-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px;
  text-align: left;
}

.result-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
  gap: 16px;
}

.result-row:last-child { border-bottom: none; }

.result-row .label {
  font-size: 18px;
  color: var(--ink-faint);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  white-space: nowrap;
}

.result-row .value {
  font-family: var(--mono);
  font-size: 21px;
  word-break: break-all;
  text-align: right;
}

.result-note {
  font-size: 19.5px;
  color: var(--ink-dim);
  line-height: 1.6;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
}

.scan-another {
  margin-top: 16px;
  text-align: center;
}

/* ---------- how it works ---------- */

.section {
  padding: 60px 0;
  border-top: 1px solid var(--line);
}

.section h3 {
  font-family: var(--grotesk);
  font-size: 33px;
  margin: 0 0 20px;
}

.steps {
  display: grid;
  gap: 16px;
}

/* ---------- common scams grid ---------- */

.section-intro {
  font-size: 21px;
  color: var(--ink-dim);
  line-height: 1.6;
  max-width: 56ch;
  margin: -8px 0 24px;
}

.scam-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.scam-card {
  display: block;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  padding: 24px;
  text-decoration: none;
  color: inherit;
  transition: border-color .15s, transform .08s;
}

.scam-card:hover { border-color: var(--teal); }

.scam-icon {
  width: 40px;
  height: 40px;
  color: var(--ink-faint);
  margin-bottom: 14px;
}

.scam-card h4 {
  font-family: var(--grotesk);
  font-size: 19px;
  color: var(--ink);
  margin: 0 0 6px;
}

.scam-card p {
  font-size: 15px;
  color: var(--ink-dim);
  line-height: 1.55;
  margin: 0;
}

/* ---------- scroll to top (mobile only) ---------- */

.scroll-top {
  position: fixed;
  right: 16px;
  bottom: 16px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--ink);
  color: var(--paper);
  border: none;
  display: none;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity .3s ease, transform .3s ease;
  pointer-events: none;
  z-index: 40;
  box-shadow: 0 4px 14px rgba(21,26,35,0.25);
}

.scroll-top svg {
  width: 20px;
  height: 20px;
}

@media (max-width: 600px) {
  .scroll-top {
    display: flex;
  }

  .scroll-top.visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }
}

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

.step .num {
  font-family: var(--mono);
  font-size: 18px;
  color: var(--teal-dark);
  border: 1px solid var(--teal);
  border-radius: 50%;
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step p {
  margin: 0;
  font-size: 21px;
  color: var(--ink-dim);
  line-height: 1.6;
}

.step strong { color: var(--ink); }

/* ---------- footer ---------- */

.site-footer {
  border-top: 1px solid var(--line);
  padding: 44px 0 24px;
  margin-top: 20px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.85fr 0.85fr 0.7fr 0.95fr;
  gap: 24px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 20px;
}

.footer-brand .logo {
  font-size: 19px;
  margin-bottom: 10px;
}

.footer-brand p {
  font-size: 14px;
  color: var(--ink-dim);
  line-height: 1.6;
  margin: 0;
  max-width: 32ch;
}

.footer-col h5 {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 0 0 12px;
}

.footer-col a {
  display: block;
  font-size: 14.5px;
  color: var(--ink-dim);
  text-decoration: none;
  margin-bottom: 9px;
}

.footer-col a:hover { color: var(--ink); }

.footer-also {
  background: rgba(0, 194, 184, 0.08);
  border-radius: 10px;
  padding: 12px 14px;
  margin: -4px;
}

.footer-also h5 { color: var(--teal-dark); }

.footer-also a {
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 4px;
}

.footer-also-desc {
  font-size: 12.5px;
  color: var(--ink-dim);
  margin: 0;
  line-height: 1.4;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 18px;
  color: var(--ink-faint);
}

.footer-bottom a { color: var(--ink-dim); text-decoration: none; }
.footer-bottom a:hover { color: var(--ink); }

@media (max-width: 600px) {
  .scam-grid {
    grid-template-columns: 1fr;
  }

  .section-intro {
    font-size: 15px;
  }

  .scam-icon {
    width: 32px;
    height: 32px;
    margin-bottom: 10px;
  }

  .scam-card h4 {
    font-size: 17px;
  }

  .scam-card p {
    font-size: 14px;
  }

  .nav-toggle {
    display: flex;
  }

  .site-header .wrap {
    position: relative;
  }

  .site-header nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    margin-top: 14px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 8px;
    box-shadow: 0 8px 24px rgba(21,26,35,0.1);
    z-index: 30;
  }

  .site-header nav.nav-open {
    display: flex;
  }

  .site-header nav a {
    width: 100%;
    padding: 12px;
    border-radius: 6px;
    font-size: 17px;
  }

  .site-header nav a:hover { background: var(--paper-2); }

  .nav-dropdown {
    width: 100%;
  }

  .nav-dropdown-trigger {
    width: 100%;
    padding: 12px;
    font-size: 17px;
    justify-content: space-between;
  }

  .nav-dropdown-menu {
    display: none;
    position: static;
    box-shadow: none;
    border: none;
    margin: 0 0 0 12px;
    padding: 0;
    min-width: 0;
  }

  .nav-dropdown.open .nav-dropdown-menu {
    display: block;
  }

  .logo {
    font-size: 19px;
    gap: 7px;
  }

  .logo-mark {
    width: 26px;
    height: 26px;
  }

  .eyebrow {
    font-size: 14px;
    letter-spacing: 0.08em;
    white-space: nowrap;
  }

  .hero {
    padding: 20px 0 16px;
  }

  .hero h1 {
    font-size: clamp(26px, 8vw, 34px);
  }

  .hero p {
    font-size: 17px;
  }

  .checkpoint {
    margin: 14px 0;
    padding: 20px 16px;
  }

  .checkpoint .bay-icon {
    width: 44px;
    height: 44px;
    margin: 0 auto 8px;
  }

  .scan-preview {
    width: 160px;
    height: 160px;
  }

  .result-row { flex-direction: column; gap: 2px; }
  .result-row .value { text-align: left; }

  /* h2-level headings */
  .checkpoint h2 { font-size: 20px; }
  .section h3 { font-size: 22px; }
  .article-header h1 { font-size: clamp(24px, 8vw, 30px); }
  .learn-hero h1 { font-size: clamp(26px, 8vw, 32px); }
  .article-body h2 { font-size: 21px; }
  .article-body h3 { font-size: 19px; }
  .learn-card h3 { font-size: 19px; }
  .faq-item h3 { font-size: 18px; }

  /* body text */
  .checkpoint .sub { font-size: 15px; }
  .step p { font-size: 15px; }
  .article-dek { font-size: 16px; }
  .article-body p { font-size: 16px; }
  .article-body li { font-size: 16px; }
  .callout p { font-size: 15px; }
  .learn-hero p { font-size: 16px; }
  .learn-card p { font-size: 15px; }
  .faq-item p { font-size: 15px; }
  .breadcrumb { font-size: 13px; }
  .learn-card .tag { font-size: 12px; }
  .callout .callout-label { font-size: 12px; }

  /* footer */
  .footer-bottom { font-size: 13px; }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 24px 16px;
  }

  .footer-brand {
    grid-column: 1 / -1;
  }

  .footer-col h5 { font-size: 11px; }
  .footer-col a { font-size: 14px; margin-bottom: 8px; }
}

@media (min-width: 601px) {
  .nav-dropdown:hover .nav-dropdown-menu {
    display: block;
  }

  .checkpoint {
    max-width: 640px;
    margin-left: auto;
    margin-right: auto;
    padding: 24px 32px;
  }

  .checkpoint .bay-icon {
    width: 56px;
    height: 56px;
  }

  .scan-preview {
    width: 180px;
    height: 180px;
  }
}

/* ---------- logo mark ---------- */

.logo-mark {
  width: 45px;
  height: 45px;
  flex-shrink: 0;
  display: block;
}

/* ---------- content / article pages ---------- */

.breadcrumb {
  font-family: var(--mono);
  font-size: 18px;
  color: var(--ink-faint);
  margin: 28px 0 0;
}

.breadcrumb a { color: var(--ink-dim); text-decoration: none; }
.breadcrumb a:hover { color: var(--ink); }

.article-header {
  padding: 30px 0 48px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 32px;
}

.article-header h1 {
  font-family: var(--grotesk);
  font-size: clamp(39px, 5vw, 54px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 12px;
}

.article-dek {
  font-size: 24px;
  color: var(--ink-dim);
  line-height: 1.6;
  max-width: 56ch;
  margin: 0;
}

.article-body { padding-bottom: 48px; }

.article-body h2 {
  font-family: var(--grotesk);
  font-size: 31.5px;
  margin: 36px 0 14px;
  letter-spacing: -0.01em;
}

.article-body h3 {
  font-family: var(--grotesk);
  font-size: 25.5px;
  margin: 24px 0 10px;
}

.article-body p {
  font-size: 22.5px;
  line-height: 1.75;
  color: var(--ink-dim);
  margin: 0 0 16px;
}

.article-body strong { color: var(--ink); }

.article-body ul, .article-body ol {
  margin: 0 0 16px;
  padding-left: 22px;
}

.article-body li {
  font-size: 22.5px;
  line-height: 1.7;
  color: var(--ink-dim);
  margin-bottom: 8px;
}

.article-body a { color: var(--teal-dark); }

.callout {
  border: 1px solid var(--line);
  border-left: 3px solid var(--teal);
  background: rgba(255,255,255,0.6);
  border-radius: 0 8px 8px 0;
  padding: 16px 18px;
  margin: 24px 0;
}

.callout p { margin: 0; font-size: 21px; color: var(--ink-dim); }
.callout p:not(:last-child) { margin-bottom: 8px; }
.callout .callout-label {
  font-family: var(--mono);
  font-size: 16.5px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--teal-dark);
  display: block;
  margin-bottom: 6px;
}

.callout.warn { border-left-color: var(--danger); }
.callout.warn .callout-label { color: var(--danger); }

.cta-inline {
  display: inline-block;
  margin-top: 8px;
  background: var(--ink);
  color: var(--paper);
  font-weight: 600;
  font-size: 21px;
  padding: 15px 27px;
  border-radius: 7px;
  text-decoration: none;
}

/* ---------- learn hub ---------- */

.learn-hero { padding: 44px 0 8px; }
.learn-hero h1 {
  font-family: var(--grotesk);
  font-size: clamp(42px, 5vw, 57px);
  margin: 0 0 10px;
}
.learn-hero p { color: var(--ink-dim); font-size: 22.5px; max-width: 56ch; }

.learn-grid {
  display: grid;
  gap: 14px;
  padding: 20px 0 48px;
}

.learn-card {
  display: block;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  padding: 27px 30px;
  text-decoration: none;
  color: inherit;
  transition: border-color .15s, transform .08s;
}

.learn-card:hover { border-color: var(--teal); }

.learn-card .tag {
  font-family: var(--mono);
  font-size: 16.5px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--teal-dark);
}

.learn-card h3 {
  font-family: var(--grotesk);
  font-size: 25.5px;
  margin: 6px 0 6px;
  color: var(--ink);
}

.learn-card p {
  font-size: 21px;
  color: var(--ink-dim);
  margin: 0;
  line-height: 1.55;
}

/* ---------- faq page ---------- */

.faq-list { padding-bottom: 48px; }

.faq-item {
  border-bottom: 1px solid var(--line);
  padding: 20px 0;
}

.faq-item h3 {
  font-family: var(--grotesk);
  font-size: 24px;
  margin: 0 0 8px;
}

.faq-item p {
  font-size: 21.8px;
  line-height: 1.7;
  color: var(--ink-dim);
  margin: 0;
}