/* Universal Access Layer — palette from /assets/design-tokens.css */
:root {
  --navy: #12355b;
  --teal: #1fa6a2;
  --amber: #f2c15b;
  --cream: #f7f4ec;
  --card: #fff;
  --ink: #21313f;
  --muted: #5f6f80;
  --line: #d7e2ed;
  --success: #0f7c4a;
  --r-sm: 8px;
  --r-md: 14px;
  --r-lg: 22px;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  background: var(--cream);
  color: var(--ink);
  font:
    18px/1.6 -apple-system,
    "Segoe UI",
    system-ui,
    sans-serif;
}
header.top {
  background: var(--navy);
  color: #fff;
  padding: 20px clamp(16px, 4vw, 40px);
}
header.top h1 {
  margin: 0 0 4px;
  font-size: clamp(22px, 3.4vw, 30px);
}
header.top .sub {
  opacity: 0.85;
  font-size: 15px;
}
.privacy {
  background: #e6f7ef;
  color: var(--success);
  border: 1px solid #b7e3cc;
  border-radius: var(--r-sm);
  padding: 8px 12px;
  font-size: 13px;
  font-weight: 600;
  display: inline-block;
  margin-top: 10px;
}
main {
  max-width: 860px;
  margin: 0 auto;
  padding: clamp(16px, 4vw, 32px);
}
.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-bottom: 20px;
}
.ctl {
  flex: 1 1 220px;
}
.ctl > .lbl {
  display: block;
  font-weight: 800;
  text-transform: uppercase;
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--muted);
  margin-bottom: 8px;
}
.seg {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.seg button {
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink);
  padding: 9px 14px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  min-height: 44px;
}
.seg button[aria-pressed="true"] {
  background: var(--teal);
  color: #fff;
  border-color: var(--teal);
}
.levelbar {
  display: flex;
  gap: 8px;
  margin-bottom: 18px;
  flex-wrap: wrap;
}
.levelbar button {
  flex: 1 1 200px;
  text-align: left;
  border: 2px solid var(--line);
  background: var(--card);
  border-radius: var(--r-md);
  padding: 12px 14px;
  cursor: pointer;
  min-height: 44px;
}
.levelbar button[aria-pressed="true"] {
  border-color: var(--navy);
  background: #eef3f8;
}
.levelbar .nm {
  display: block;
  font-weight: 800;
  color: var(--navy);
}
.levelbar .bl {
  font-size: 13px;
  color: var(--muted);
}
.problem {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 24px clamp(18px, 3vw, 32px);
  box-shadow: 0 1px 4px rgba(18, 53, 91, 0.07);
}
.problem h2 {
  margin: 0 0 14px;
  color: var(--navy);
}
.ptext {
  font-size: clamp(18px, 2.4vw, 22px);
  line-height: 1.75;
  white-space: pre-wrap;
}
.ptext[dir="rtl"] {
  text-align: right;
  font-size: clamp(20px, 2.6vw, 24px);
}
.term {
  background: var(--amber);
  border-radius: 6px;
  padding: 1px 6px;
  font-weight: 700;
  cursor: pointer;
  border-bottom: 2px dotted var(--ink);
}
.term:focus-visible {
  outline: 3px solid var(--navy);
}
.toolbar {
  display: flex;
  gap: 10px;
  margin-top: 18px;
  flex-wrap: wrap;
  align-items: center;
}
.btn {
  border: 0;
  background: var(--navy);
  color: #fff;
  padding: 12px 20px;
  border-radius: var(--r-sm);
  font-weight: 700;
  font-size: 16px;
  cursor: pointer;
  min-height: 48px;
}
.btn.alt {
  background: var(--card);
  color: var(--navy);
  border: 1px solid var(--line);
}
.rate {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--muted);
}
/* glossary popover */
.gloss {
  position: fixed;
  z-index: 60;
  max-width: 300px;
  background: var(--navy);
  color: #fff;
  border-radius: var(--r-md);
  padding: 14px 16px;
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.28);
  display: none;
}
.gloss.show {
  display: block;
}
.gloss .gi {
  font-size: 26px;
}
.gloss .gt {
  font-weight: 800;
  text-transform: capitalize;
  margin: 4px 0;
}
.gloss .gd {
  font-size: 15px;
  line-height: 1.5;
}
.gloss button {
  margin-top: 10px;
  background: var(--amber);
  color: var(--ink);
  border: 0;
  border-radius: var(--r-sm);
  padding: 6px 12px;
  font-weight: 700;
  cursor: pointer;
}
@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
  }
}