/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --navy:       #0D1F3C;
  --blue:       #1A3A6B;
  --blue-mid:   #2E5FA3;
  --blue-light: #4A7FD4;
  --white:      #FFFFFF;
  --off-white:  #F4F6FA;
  --grey-light: #E8EDF5;
  --grey-mid:   #6B7280;
  --grey-dark:  #374151;
  --text:       #111827;
  --green-dark: #14532D;
  --green-bg:   #DCFCE7;
  --green-bdr:  #16A34A;
  --amber-bg:   #FEF3C7;
  --amber-bdr:  #D97706;
  --amber-text: #78350F;
  --red-bg:     #FEE2E2;
  --red-bdr:    #DC2626;
  --red-text:   #7F1D1D;
  --focus:      #FFD700;
  --focus-dark: #B45309;
}

html { scroll-behavior: smooth; }

body {
  font-family: Arial, 'Helvetica Neue', Helvetica, sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text);
  background: var(--off-white);
}

/* ── Skip Link (WCAG 2.4.1) ── */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 9999;
  padding: 0.75rem 1.5rem;
  background: var(--focus);
  color: var(--navy);
  font-weight: 700;
  font-size: 1rem;
  border-radius: 0 0 6px 6px;
  text-decoration: none;
  border: 3px solid var(--navy);
  transition: top 0.15s;
}
.skip-link:focus { top: 0; }

/* ── Focus styles (WCAG 2.4.7, 2.4.11) ── */
:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
  border-radius: 3px;
}

/* ── Header / Nav ── */
header {
  background: var(--navy);
  color: var(--white);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,0.4);
}
.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  min-height: 64px;
}
.site-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--white);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.site-title:focus-visible { outline-color: var(--focus); }
.site-title svg { flex-shrink: 0; }

nav[aria-label="Main navigation"] ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
}
nav[aria-label="Main navigation"] a {
  display: block;
  padding: 0.5rem 0.85rem;
  color: #D1E3FF;
  text-decoration: none;
  font-size: 0.95rem;
  border-radius: 4px;
  transition: background 0.15s, color 0.15s;
  white-space: nowrap;
  min-height: 44px;
  display: flex;
  align-items: center;
}
nav[aria-label="Main navigation"] a:hover,
nav[aria-label="Main navigation"] a[aria-current="page"] {
  background: var(--blue-mid);
  color: var(--white);
}

/* ── Hero ── */
.hero {
  background: linear-gradient(135deg, var(--navy) 0%, var(--blue) 60%, var(--blue-mid) 100%);
  color: var(--white);
  padding: 4rem 1.5rem 3rem;
  text-align: center;
}
.hero h1 {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  line-height: 1.25;
  margin-bottom: 1rem;
  max-width: 750px;
  margin-left: auto;
  margin-right: auto;
}
.hero p {
  font-size: 1.15rem;
  max-width: 650px;
  margin: 0 auto 2rem;
  color: #C8D9F5;
  line-height: 1.7;
}
.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.75rem;
  font-size: 1rem;
  font-weight: 700;
  border-radius: 6px;
  text-decoration: none;
  cursor: pointer;
  border: 2px solid transparent;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
  min-height: 44px;
  min-width: 44px;
}
.btn-primary {
  background: var(--focus);
  color: var(--navy);
  border-color: var(--focus);
}
.btn-primary:hover { background: #FBBF24; border-color: #FBBF24; }
.btn-secondary {
  background: transparent;
  color: var(--white);
  border-color: rgba(255,255,255,0.6);
}
.btn-secondary:hover { background: rgba(255,255,255,0.1); border-color: var(--white); }

/* ── Main layout ── */
main { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem 4rem; }
section { padding-top: 3.5rem; }
.section-heading {
  font-size: clamp(1.4rem, 3vw, 2rem);
  color: var(--navy);
  margin-bottom: 0.5rem;
  border-bottom: 3px solid var(--blue-mid);
  padding-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.section-intro {
  color: var(--grey-dark);
  font-size: 1rem;
  margin-bottom: 2rem;
  max-width: 960px;
  line-height: 1.7;
}

/* ── About cards ── */
.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2.5rem;
}
.about-card {
  background: var(--white);
  border-radius: 10px;
  padding: 1.75rem;
  border: 1px solid var(--grey-light);
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}
.about-card h3 {
  font-size: 1.1rem;
  color: var(--navy);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.about-card p { color: var(--grey-dark); font-size: 0.95rem; line-height: 1.65; }

/* ── Laws section ── */
.laws-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
}
.law-card {
  background: var(--white);
  border-radius: 10px;
  padding: 1.5rem;
  border-left: 5px solid var(--blue-mid);
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}
.law-card .country-tag {
  display: inline-block;
  background: var(--blue-mid);
  color: var(--white);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  padding: 0.2rem 0.65rem;
  border-radius: 3px;
  margin-bottom: 0.75rem;
  text-transform: uppercase;
}
.law-card h3 {
  font-size: 1rem;
  color: var(--navy);
  margin-bottom: 0.5rem;
}
.law-card p { font-size: 0.875rem; color: var(--grey-dark); line-height: 1.6; }
.law-card ul { margin: 0.5rem 0 0 1.25rem; font-size: 0.875rem; color: var(--grey-dark); }
.law-card ul li { margin-bottom: 0.25rem; }

/* ── Checklist section ── */
.checklist-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  margin-bottom: 1.5rem;
  background: var(--white);
  padding: 1.25rem 1.5rem;
  border-radius: 8px;
  border: 1px solid var(--grey-light);
}
.checklist-controls label {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--grey-dark);
  margin-right: 0.35rem;
}
.checklist-controls select,
.checklist-controls input[type="search"] {
  padding: 0.55rem 0.85rem;
  border: 2px solid var(--blue-mid);
  border-radius: 5px;
  font-size: 0.95rem;
  background: var(--white);
  color: var(--text);
  min-height: 44px;
  min-width: 180px;
}
.checklist-controls select:focus,
.checklist-controls input[type="search"]:focus { outline: 3px solid var(--focus); outline-offset: 2px; }
.progress-bar-container {
  flex: 1;
  min-width: 200px;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.progress-bar-outer {
  flex: 1;
  background: var(--grey-light);
  border-radius: 99px;
  height: 14px;
  overflow: hidden;
  border: 1px solid var(--blue-mid);
}
.progress-bar-inner {
  height: 100%;
  background: linear-gradient(90deg, var(--green-bdr), #4ADE80);
  border-radius: 99px;
  transition: width 0.3s ease;
  width: 0%;
}
.progress-label { font-size: 0.875rem; font-weight: 700; color: var(--grey-dark); white-space: nowrap; }

.principle-section { margin-bottom: 2.5rem; }
.principle-title { margin: 0; }
.principle-header {
  background: var(--navy);
  color: var(--white);
  padding: 0.9rem 1.25rem;
  border-radius: 8px 8px 0 0;
  font-size: 1.05rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  cursor: pointer;
  border: 2px solid var(--navy);
  width: 100%;
  text-align: left;
}
.principle-header:hover { background: var(--blue); border-color: var(--blue); }
.principle-header .chevron {
  margin-left: auto;
  transition: transform 0.25s;
  flex-shrink: 0;
}
.principle-header[aria-expanded="false"] .chevron { transform: rotate(-90deg); }
.principle-body { border: 2px solid var(--navy); border-top: none; border-radius: 0 0 8px 8px; }

.guideline-group { border-bottom: 1px solid var(--grey-light); }
.guideline-group:last-child { border-bottom: none; }
.guideline-header {
  background: var(--blue);
  color: var(--white);
  margin: 0;
  padding: 0.65rem 1.25rem;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.criterion-row {
  display: grid;
  grid-template-columns: 36px 90px 1fr;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--grey-light);
  align-items: start;
  background: var(--white);
  transition: background 0.15s;
}
.criterion-row:last-child { border-bottom: none; }
.criterion-row:nth-child(even) { background: var(--off-white); }
.criterion-row.new-22 { background: #EDFBF0; }
.criterion-row.new-22:nth-child(even) { background: #DDF5E5; }
.criterion-row.obsolete { background: #F5F5F5; }
.criterion-row.hidden { display: none; }

.criterion-checkbox-wrap {
  padding-top: 0.1rem;
  display: flex;
  justify-content: center;
}
.criterion-checkbox {
  width: 22px;
  height: 22px;
  cursor: pointer;
  accent-color: var(--blue-mid);
  flex-shrink: 0;
  min-width: 22px;
  min-height: 22px;
}
.sc-id-badge {
  font-family: monospace;
  font-size: 0.8rem;
  font-weight: 700;
  background: var(--blue);
  color: var(--white);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  align-self: start;
  margin-top: 0.1rem;
  white-space: nowrap;
}
.criterion-row.new-22 .sc-id-badge { background: var(--green-dark); }
.criterion-row.obsolete .sc-id-badge { background: var(--grey-dark); }

.criterion-content h5 {
  font-size: 0.95rem;
  color: var(--navy);
  margin-bottom: 0.3rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
}
.level-badge {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.15rem 0.45rem;
  border-radius: 3px;
  background: var(--grey-light);
  color: var(--grey-dark);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.new-badge {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.15rem 0.45rem;
  border-radius: 3px;
  background: var(--green-bg);
  color: var(--green-dark);
  border: 1px solid var(--green-bdr);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.obsolete-badge {
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.15rem 0.45rem;
  border-radius: 3px;
  background: var(--white);
  color: var(--grey-dark);
  border: 1px solid var(--grey-mid);
  text-transform: uppercase;
}
.criterion-what {
  font-size: 0.875rem;
  color: var(--grey-dark);
  margin-bottom: 0.5rem;
  line-height: 1.55;
}
.criterion-details {
  display: none;
  margin-top: 0.6rem;
}
.criterion-details.open { display: block; }
.detail-row {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 0.4rem 0.75rem;
  font-size: 0.825rem;
  margin-bottom: 0.35rem;
  align-items: start;
}
.detail-label {
  font-weight: 700;
  color: var(--navy);
  padding-top: 0.1rem;
}
.detail-value { color: var(--grey-dark); line-height: 1.5; }
.priority-critical { color: #991B1B; font-weight: 700; }
.priority-high { color: #B45309; font-weight: 700; }
.priority-medium { color: #1E40AF; font-weight: 600; }

.toggle-details-btn {
  font-size: 0.8rem;
  color: var(--blue-mid);
  background: none;
  border: 1px solid var(--blue-mid);
  border-radius: 4px;
  padding: 0.2rem 0.6rem;
  cursor: pointer;
  margin-top: 0.4rem;
  min-height: 32px;
}
.toggle-details-btn:hover { background: var(--grey-light); }

/* ── Tools section ── */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 1.25rem;
}
.tool-card {
  background: var(--white);
  border-radius: 10px;
  padding: 1.5rem;
  border: 1px solid var(--grey-light);
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.tool-card-header { display: flex; justify-content: space-between; align-items: flex-start; gap: 0.5rem; }
.tool-name { font-size: 1rem; font-weight: 700; color: var(--navy); }
.tool-type {
  font-size: 0.725rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.2rem 0.55rem;
  border-radius: 3px;
  white-space: nowrap;
  flex-shrink: 0;
}
.type-extension { background: #EEF2FF; color: #3730A3; }
.type-screenreader { background: #FEF3C7; color: #78350F; }
.type-speech { background: #FCE7F3; color: #701A75; }
.type-desktop { background: #F0FDF4; color: #14532D; }
.type-cli { background: #F5F3FF; color: #4C1D95; }
.type-manual { background: #FFF7ED; color: #7C2D12; }
.type-design { background: #EFF6FF; color: #1E3A8A; }
.type-builtin { background: #E0F2FE; color: #0C4A6E; }
.type-web { background: #F0FDF4; color: #166534; }

.tool-cost {
  font-size: 0.8rem;
  color: var(--grey-mid);
  margin-bottom: 0.1rem;
}
.tool-cost strong { color: var(--grey-dark); }
.tool-platform { font-size: 0.8rem; color: var(--grey-mid); }
.tool-desc { font-size: 0.875rem; color: var(--grey-dark); line-height: 1.6; flex: 1; }

/* ── Download section ── */
.download-banner {
  background: linear-gradient(135deg, var(--navy), var(--blue));
  color: var(--white);
  border-radius: 12px;
  padding: 2.5rem 2rem;
  display: flex;
  align-items: center;
  gap: 2rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}
.download-banner svg { flex-shrink: 0; color: var(--focus); }
.download-text h3 { font-size: 1.3rem; margin-bottom: 0.5rem; }
.download-text p { font-size: 0.95rem; color: #C8D9F5; line-height: 1.6; max-width: 550px; }
.download-actions { margin-top: 1.25rem; display: flex; gap: 1rem; flex-wrap: wrap; }

/* ── Footer ── */
footer {
  background: var(--navy);
  color: #A0B3D0;
  text-align: center;
  padding: 1.75rem 1.5rem;
  font-size: 0.875rem;
  line-height: 1.7;
  margin-top: 4rem;
}
footer a { color: #90C0FF; }
footer a:hover { color: var(--white); }
footer strong { color: var(--white); }

/* ── Responsive ── */
@media (max-width: 640px) {
  .criterion-row { grid-template-columns: 30px 70px 1fr; gap: 0.5rem; padding: 0.85rem 0.9rem; }
  .detail-row { grid-template-columns: 1fr; gap: 0.2rem; }
  .detail-label { margin-bottom: 0; }
  .hero { padding: 2.5rem 1rem 2rem; }
  .checklist-controls { padding: 1rem; }
}

/* ── Print ── */
@media print {
  .skip-link, header, .checklist-controls, .hero-actions, footer { display: none; }
  .criterion-details { display: block !important; }
}