/* ── Navigation ── */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--ink);
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  box-shadow: 0 2px 12px var(--shadow);
  transition: transform .3s ease;
}

nav.nav--sales {
  height: 56px;
}

.nav-logo {
  font-family: 'Fredoka One', cursive;
  color: var(--gold-l);
  font-size: 1.2rem;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
}

nav.nav--sales .nav-logo {
  font-size: 1.1rem;
}

.nav-logo i {
  font-size: 1.3rem;
}

.nav-links {
  display: flex;
  gap: 24px;
  align-items: center;
}

.nav-links a {
  color: var(--parchment);
  text-decoration: none;
  font-size: .88rem;
  font-weight: 700;
  opacity: .85;
  transition: opacity .2s;
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-links a:hover {
  opacity: 1;
  color: var(--gold-l);
}

.nav-back {
  color: rgba(255, 255, 255, .65);
  text-decoration: none;
  font-size: .82rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: color .2s;
}

.nav-back:hover {
  color: var(--gold-l);
}

.nav-cta {
  background: var(--rust);
  color: #fff !important;
  padding: 7px 18px;
  border-radius: 20px;
  opacity: 1 !important;
}

.nav-cta:hover {
  background: var(--rust-d) !important;
}

.nav-cta--sm {
  font-family: 'Fredoka One', cursive;
  font-size: .9rem;
  padding: 8px 20px;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: background .15s;
}

/* Nav price group */
.nav-price-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-price {
  font-family: 'Fredoka One', cursive;
  font-size: 1rem;
  color: var(--gold-l);
  letter-spacing: .01em;
}

@media (max-width: 480px) {
  .nav-price {
    display: none;
  }
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: 'Fredoka One', cursive;
  font-size: 1.05rem;
  letter-spacing: .02em;
  padding: 13px 28px;
  border-radius: 40px;
  text-decoration: none;
  transition: transform .15s, box-shadow .15s, filter .15s;
  cursor: pointer;
  border: none;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--rust);
  color: #fff;
  box-shadow: 0 6px 24px rgba(192, 67, 26, .4);
}

.btn-primary:hover {
  background: var(--rust-d);
  box-shadow: 0 8px 28px rgba(192, 67, 26, .5);
}

.btn-outline {
  background: transparent;
  color: var(--gold-l);
  border: 2px solid var(--gold-l);
}

.btn-outline:hover {
  background: rgba(212, 146, 10, .1);
}

body[data-book] .btn-outline {
  color: rgba(255, 255, 255, .85);
  border-color: rgba(255, 255, 255, .4);
}

body[data-book] .btn-outline:hover {
  border-color: var(--book-accent);
  color: var(--book-accent);
  background: transparent;
}

.btn-teal {
  background: var(--teal);
  color: #fff;
  box-shadow: 0 6px 20px rgba(26, 107, 90, .35);
}

.btn-teal:hover {
  background: var(--teal-l);
}

.btn-sm {
  font-size: .88rem;
  padding: 10px 20px;
}

.btn-buy {
  background: var(--rust);
  color: #fff;
  font-family: 'Fredoka One', cursive;
  font-size: .9rem;
  padding: 10px 18px;
  border-radius: 24px;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: background .15s, transform .15s;
  display: flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
  flex-shrink: 0;
}

.btn-buy:hover {
  background: var(--rust-d);
  transform: translateY(-1px);
}

.btn-buy.off {
  background: #c0b0a0;
  cursor: not-allowed;
  pointer-events: none;
}

.btn-price {
  width: 100%;
  justify-content: center;
  font-size: .95rem;
  padding: 12px;
}

/* ── Icon badges (unified) ── */
.icon-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
}

.icon-badge--rust  { background: rgba(192, 67, 26, .12);  color: var(--rust); }
.icon-badge--teal  { background: rgba(26, 107, 90, .12);  color: var(--teal); }
.icon-badge--gold  { background: rgba(212, 146, 10, .12);  color: var(--gold); }
.icon-badge--green { background: rgba(26, 107, 90, .1);   color: var(--teal); }
.icon-badge--blue  { background: rgba(91, 155, 213, .12);  color: var(--book-bg); }

.icon-badge--square {
  border-radius: 10px;
}

/* ── Feature cards (unified why-card / hl-card) ── */
.feature-card {
  background: var(--cream);
  border-radius: var(--radius);
  padding: 28px 24px;
  border: 1.5px solid rgba(212, 146, 10, .2);
  box-shadow: 0 2px 12px var(--shadow);
  text-align: center;
}

.feature-card .feature-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  font-size: 1.4rem;
}

.feature-card h3,
.feature-card h4 {
  font-size: 1.1rem;
  color: var(--ink);
  margin-bottom: 10px;
}

.feature-card p {
  font-size: .86rem;
  color: #5a4030;
  line-height: 1.65;
}

.feature-grid {
  display: grid;
  gap: 24px;
  margin-top: 48px;
}

.feature-grid--3 {
  grid-template-columns: repeat(3, 1fr);
}

.feature-grid--4 {
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 40px;
}

.feature-grid--4 .feature-card {
  padding: 24px 20px;
}

.feature-grid--4 .feature-card .feature-icon {
  width: 52px;
  height: 52px;
  font-size: 1.3rem;
  margin-bottom: 14px;
}

.feature-grid--4 .feature-card h4 {
  font-size: 1rem;
  margin-bottom: 6px;
}

.feature-grid--4 .feature-card p {
  font-size: .8rem;
  color: #6a5040;
}

/* ── Book covers ── */
.book-cover,
.s-cover {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.bc1 { background: #4A2518; }
.bc2 { background: #1A3A2A; }
.bc3 { background: #1A2A4A; }
.bc4 { background: #3A1A40; }
.bc5 { background: #3A2A10; }

.book-cover-img {
  width: 100%;
  border-radius: 14px;
}

.s-cover img {
  width: 100%;
}

.s-cover-icon {
  color: rgba(255, 255, 255, .85);
  font-size: 2rem;
}

/* ── Footer ── */
footer {
  background: var(--ink);
  padding: 44px 24px;
  text-align: center;
}

body[data-book] footer {
    margin-bottom: 60px;
}

.foot-logo {
  font-family: 'Fredoka One', cursive;
  font-size: 1.5rem;
  color: var(--gold-l);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
  justify-content: center;
}

.foot-logo i {
  font-size: 1.4rem;
}

.foot-links {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin: 16px 0;
  flex-wrap: wrap;
}

.foot-links a {
  color: rgba(255, 255, 255, .5);
  text-decoration: none;
  font-size: .8rem;
  transition: color .15s;
  display: flex;
  align-items: center;
  gap: 5px;
}

.foot-links a:hover {
  color: var(--gold-l);
}

footer p {
  color: rgba(255, 255, 255, .35);
  font-size: .78rem;
  line-height: 1.7;
}

@media (max-width: 900px) {
  .feature-grid--3,
  .feature-grid--4 {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .feature-grid--4 {
    grid-template-columns: 1fr;
  }
}