.qb-reading-hub {
  --reading-ink: #27352f;
  --reading-muted: #59665f;
  --reading-paper: #f5edda;
  --reading-paper-deep: #eadfc6;
  min-height: calc(100vh - 76px);
  padding: clamp(16px, 3vw, 38px);
  color: var(--reading-ink);
  background:
    radial-gradient(circle at 14% 10%, rgba(255, 255, 255, .72), transparent 32%),
    linear-gradient(145deg, #f8f2e4, var(--reading-paper));
  font-family: Georgia, 'Times New Roman', serif;
}

.qb-reading-hub button { font: inherit; }

.qb-reading-hub__hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(180px, 310px);
  gap: clamp(20px, 5vw, 70px);
  max-width: 1240px;
  margin: 0 auto;
  padding: clamp(28px, 5vw, 66px);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, .16);
  border-radius: 26px;
  color: #fffaf0;
  background: linear-gradient(135deg, #173d35, #245b4d 68%, #376b59);
  box-shadow: 0 18px 40px rgba(31, 50, 42, .18);
}

.qb-reading-hub__hero::after {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(115deg, transparent 56%, rgba(230, 193, 110, .12));
}

.qb-reading-hub__back {
  position: absolute;
  z-index: 2;
  top: 16px;
  left: 18px;
  min-height: 44px;
  padding: 8px 13px;
  border: 0;
  border-radius: 12px;
  color: #fff8e8;
  background: rgba(255, 255, 255, .1);
  cursor: pointer;
}

.qb-reading-hub__back:hover,
.qb-reading-hub__back:focus-visible { background: rgba(255, 255, 255, .2); }

.qb-reading-hub__hero-copy { align-self: end; padding-top: 30px; }
.qb-reading-hub__hero-copy p {
  margin: 0 0 9px;
  color: #efd28f;
  font: 800 .78rem/1.2 system-ui, sans-serif;
  letter-spacing: .13em;
  text-transform: uppercase;
}
.qb-reading-hub__hero-copy h1 {
  max-width: 780px;
  margin: 0;
  font-size: clamp(2.25rem, 5vw, 4.9rem);
  line-height: .98;
  letter-spacing: -.04em;
}
.qb-reading-hub__hero-copy > span {
  display: block;
  max-width: 720px;
  margin-top: 18px;
  color: #e8eee9;
  font: 500 clamp(1.02rem, 1.7vw, 1.28rem)/1.55 system-ui, sans-serif;
}

.qb-reading-hub__paper {
  position: relative;
  z-index: 1;
  align-self: center;
  min-height: 210px;
  padding: 48px 32px;
  border-radius: 8px 18px 18px 8px;
  color: #4b463b;
  background: #f6edda;
  box-shadow: -14px 14px 0 rgba(10, 31, 27, .24), inset 7px 0 0 #e1d2b4;
  transform: rotate(2deg);
}
.qb-reading-hub__paper::before {
  content: 'BOOK ONE';
  display: block;
  margin-bottom: 24px;
  color: #947540;
  font: 800 .72rem/1 system-ui, sans-serif;
  letter-spacing: .17em;
}
.qb-reading-hub__paper span { font-size: clamp(1.45rem, 2.5vw, 2.2rem); line-height: 1.5; }

.qb-reading-hub__intro {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  max-width: 1160px;
  margin: 26px auto 18px;
  font-family: system-ui, sans-serif;
}
.qb-reading-hub__intro div { display: grid; gap: 3px; }
.qb-reading-hub__intro strong { font-size: clamp(1.05rem, 2vw, 1.3rem); }
.qb-reading-hub__intro div span { color: var(--reading-muted); }
.qb-reading-hub__comfort {
  padding: 10px 14px;
  border: 1px solid #d5c8ab;
  border-radius: 999px;
  color: #536159;
  background: rgba(255, 255, 255, .42);
  font-size: .86rem;
  font-weight: 750;
}

.qb-reading-hub__lanes {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  max-width: 1160px;
  margin: 0 auto;
}
.qb-reading-lane {
  display: flex;
  flex-direction: column;
  min-height: 420px;
  padding: clamp(22px, 3vw, 32px);
  border: 1px solid #d8ccb3;
  border-top: 7px solid var(--lane, #3f725f);
  border-radius: 20px;
  background: rgba(255, 253, 247, .86);
  box-shadow: 0 10px 26px rgba(57, 51, 39, .08);
}
.qb-reading-lane--phonics { --lane: #bd6b42; }
.qb-reading-lane--focus { --lane: #3d7764; }
.qb-reading-lane--authors { --lane: #78608c; }
.qb-reading-lane__top { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.qb-reading-lane__icon { font-size: 2rem; }
.qb-reading-lane__stage {
  color: var(--lane);
  font: 800 .73rem/1.2 system-ui, sans-serif;
  letter-spacing: .08em;
  text-align: right;
  text-transform: uppercase;
}
.qb-reading-lane h2 { margin: 20px 0 10px; font-size: clamp(1.65rem, 2.4vw, 2.15rem); line-height: 1.05; }
.qb-reading-lane p { margin: 0; color: #4f5d55; font: 500 1rem/1.58 system-ui, sans-serif; }
.qb-reading-lane ul {
  display: grid;
  gap: 8px;
  margin: 22px 0 26px;
  padding: 0;
  color: #4d5b54;
  font: 650 .9rem/1.4 system-ui, sans-serif;
  list-style: none;
}
.qb-reading-lane li::before { content: '✓'; margin-right: 8px; color: var(--lane); font-weight: 900; }
.qb-reading-lane button {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 15px;
  min-height: 54px;
  margin-top: auto;
  padding: 12px 16px;
  border: 0;
  border-radius: 13px;
  color: #fff;
  background: var(--lane);
  box-shadow: 0 4px 0 rgba(20, 35, 30, .28);
  font-family: system-ui, sans-serif;
  font-weight: 850;
  cursor: pointer;
}
.qb-reading-lane button:hover { filter: brightness(1.07); transform: translateY(-1px); }
.qb-reading-lane button:active { box-shadow: 0 2px 0 rgba(20, 35, 30, .28); transform: translateY(2px); }
.qb-reading-lane button:focus-visible, .qb-reading-hub__back:focus-visible { outline: 4px solid #f1c866; outline-offset: 3px; }
.qb-reading-lane button b { font-size: 1.35rem; }

.qb-reading-hub__footer {
  max-width: 1120px;
  margin: 22px auto 0;
  padding: 18px 20px;
  border-top: 1px solid #d6c8a9;
  color: #59665f;
  font: 500 .92rem/1.5 system-ui, sans-serif;
  text-align: center;
}
.qb-reading-hub__footer strong { color: #32483e; }

@media (max-width: 900px) {
  .qb-reading-hub__lanes { grid-template-columns: 1fr; }
  .qb-reading-lane { min-height: 0; }
}

@media (max-width: 700px) {
  .qb-reading-hub { padding: 10px; }
  .qb-reading-hub__hero { grid-template-columns: 1fr; padding: 28px 24px; }
  .qb-reading-hub__hero-copy { padding-top: 38px; }
  .qb-reading-hub__paper { display: none; }
  .qb-reading-hub__intro { align-items: flex-start; flex-direction: column; padding: 0 8px; }
  .qb-reading-hub__comfort { border-radius: 14px; }
}

@media (prefers-reduced-motion: reduce) {
  .qb-reading-lane button { transition: none; }
  .qb-reading-lane button:hover { transform: none; }
}