/* ============================================================
   Bundle page — supplemental styles
   All base tokens, nav, footer, buttons from style.css
   ============================================================ */

/* ── BUNDLE HERO ─────────────────────────────────────────────── */
.bundle-hero-title {
  font-size: var(--text-3xl);
  line-height: 1.05;
}

/* ── THREE COVERS ─────────────────────────────────────────────── */
.bundle-covers-section {
  padding-block: clamp(var(--space-12), 7vw, var(--space-20));
  border-bottom: 1px solid var(--color-divider);
}

.bundle-covers {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-10);
}

.bundle-cover-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
}

.bundle-cover-img {
  width: clamp(130px, 20vw, 190px);
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  display: block;
}

.bundle-cover-label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-faint);
}

.bundle-cover-plus {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: var(--color-primary);
  opacity: 0.5;
  align-self: center;
  padding-bottom: var(--space-6);
}

.bundle-price-strip {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-6);
  flex-wrap: wrap;
  padding: var(--space-6) var(--space-8);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  max-width: 480px;
  margin-inline: auto;
}

.bundle-price-individual {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
}

.bundle-price-each {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  text-decoration: line-through;
  text-decoration-color: var(--color-text-faint);
}

.bundle-price-each-label {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  font-weight: 600;
}

.bundle-price-arrow {
  font-size: var(--text-xl);
  color: var(--color-primary);
  font-weight: 300;
}

.bundle-price-total {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
}

.bundle-price-big {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: var(--color-text);
  line-height: 1;
}

.bundle-price-save {
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--color-primary);
  background: var(--color-primary-bg);
  border-radius: var(--radius-full);
  padding: var(--space-1) var(--space-3);
}

/* ── BOOK ROWS ─────────────────────────────────────────────────── */
.bundle-books {
  padding-block: clamp(var(--space-12), 7vw, var(--space-20));
  border-bottom: 1px solid var(--color-divider);
}

.bundle-book-row {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: var(--space-10);
  align-items: start;
  padding-block: var(--space-10);
}

.bundle-book-number {
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-primary);
  opacity: 0.45;
  margin-bottom: var(--space-2);
}

.bundle-book-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-text);
  line-height: 1.15;
  margin-bottom: var(--space-2);
  font-weight: 400;
}

.bundle-book-subtitle {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.5;
}

.bundle-book-content p {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.75;
  margin-bottom: var(--space-5);
  max-width: 52ch;
}

.bundle-book-bullets {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
  list-style: none;
}

.bundle-book-bullets li {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  padding-left: var(--space-5);
  position: relative;
  line-height: 1.6;
}

.bundle-book-bullets li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--color-primary);
}

.bundle-book-link {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: 1px solid color-mix(in srgb, var(--color-primary) 30%, transparent);
  padding-bottom: 1px;
  transition: border-color var(--transition), color var(--transition);
}

.bundle-book-link:hover {
  color: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
}

.bundle-book-divider {
  border: none;
  border-top: 1px solid var(--color-divider);
}

/* ── METHOD SECTION ────────────────────────────────────────────── */
.bundle-method {
  padding-block: clamp(var(--space-12), 7vw, var(--space-20));
  border-bottom: 1px solid var(--color-divider);
}

/* ── BUNDLE BUY ────────────────────────────────────────────────── */
.bundle-buy {
  padding-block: clamp(var(--space-12), 7vw, var(--space-20));
  border-bottom: 1px solid var(--color-divider);
}

.bundle-buy-inner {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: var(--space-10);
  align-items: start;
}

/* Stacked book covers */
.bundle-buy-covers {
  position: sticky;
  top: calc(var(--space-16) + var(--space-4));
}

.bundle-stack {
  position: relative;
  width: 160px;
  height: 240px;
  margin-inline: auto;
}

.bundle-stack-img {
  position: absolute;
  width: 140px;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.bundle-stack-back {
  top: 16px;
  left: 20px;
  transform: rotate(4deg);
  opacity: 0.75;
  z-index: 1;
}

.bundle-stack-mid {
  top: 8px;
  left: 10px;
  transform: rotate(2deg);
  opacity: 0.88;
  z-index: 2;
}

.bundle-stack-front {
  top: 0;
  left: 0;
  transform: rotate(0deg);
  z-index: 3;
}

.bundle-buy-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-text);
  margin-bottom: var(--space-6);
  line-height: 1.2;
}

.bundle-includes {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  list-style: none;
  margin-bottom: var(--space-6);
}

.bundle-includes li {
  display: flex;
  gap: var(--space-3);
  align-items: baseline;
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.5;
}

.bundle-include-check {
  color: var(--color-primary);
  font-weight: 700;
  flex-shrink: 0;
}

.bundle-includes strong {
  color: var(--color-text);
}

.bundle-buy-details {
  margin-bottom: var(--space-5);
}

.bundle-pricing {
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
}

.bundle-price-strike {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-text-faint);
  text-decoration: line-through;
}

/* ── RESPONSIVE ────────────────────────────────────────────────── */
@media (max-width: 640px) {
  .bundle-covers { gap: var(--space-2); }
  .bundle-cover-plus { font-size: var(--text-xl); padding-bottom: var(--space-4); }

  .bundle-book-row {
    grid-template-columns: 1fr;
    gap: var(--space-4);
    padding-block: var(--space-8);
  }

  .bundle-buy-inner {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .bundle-buy-covers {
    position: static;
  }

  .bundle-stack {
    width: 130px;
    height: 200px;
  }

  .bundle-stack-img { width: 115px; }

  .bundle-price-strip {
    gap: var(--space-4);
    padding: var(--space-5);
  }
}