/* ============================================
   METAMORFOSIS — Page Styles
   White/clean aesthetic inspired by navalmanack.com
   ============================================ */

/* ─── Skip Link ─── */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  padding: var(--space-2) var(--space-4);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  z-index: 200;
  transition: top var(--transition-interactive);
  text-decoration: none;
}
.skip-link:focus {
  top: var(--space-4);
}

/* ─── Hero ─── */
.hero {
  padding: clamp(var(--space-12), 8vw, var(--space-24)) var(--space-6);
  padding-bottom: clamp(var(--space-16), 10vw, var(--space-32));
}
.hero-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: clamp(var(--space-8), 5vw, var(--space-16));
  align-items: center;
}

.hero-book {
  display: flex;
  justify-content: center;
}
.book-cover {
  width: clamp(220px, 25vw, 340px);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-book);
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1),
              box-shadow 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}
.book-cover:hover {
  transform: translateY(-4px);
  box-shadow: 0 28px 60px rgba(0, 0, 0, 0.16), 0 10px 24px rgba(0, 0, 0, 0.08);
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.hero-title {
  font-size: var(--text-3xl);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--color-text);
}
.hero-title .accent {
  color: var(--color-primary);
}
.hero-subtitle {
  font-size: var(--text-lg);
  font-weight: 400;
  color: var(--color-text-muted);
  line-height: 1.4;
  font-style: italic;
}
.hero-author {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.hero-book-heading {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.01em;
  margin-top: var(--space-6);
}
.hero-description {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 48ch;
}

/* ─── Shared section styles ─── */
.section-label {
  font-size: var(--text-xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--color-text-muted);
}
.section-heading {
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-text);
}

/* ─── Download / Email Gate ─── */
.download-section {
  padding: clamp(var(--space-12), 8vw, var(--space-24)) var(--space-6);
}
.download-inner {
  max-width: var(--content-narrow);
  margin: 0 auto;
  text-align: center;
}
.download-heading {
  font-size: var(--text-2xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-8);
  color: var(--color-text);
}
.download-subtext {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-8);
  max-width: 44ch;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.6;
}
.download-locked-msg {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  font-style: italic;
}
.download-disclaimer {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-top: var(--space-3);
}

/* Form */
.subscribe-form {
  display: flex;
  gap: var(--space-3);
  max-width: 440px;
  margin: 0 auto;
}
.subscribe-input {
  flex: 1;
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  transition: border-color var(--transition-interactive),
              box-shadow var(--transition-interactive);
}
.subscribe-input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-highlight);
}
.subscribe-input::placeholder {
  color: var(--color-text-faint);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition-interactive),
              color var(--transition-interactive),
              box-shadow var(--transition-interactive),
              transform var(--transition-interactive);
  white-space: nowrap;
  text-decoration: none;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  border: none;
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  box-shadow: var(--shadow-md);
}
.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

.btn-disabled {
  background: var(--color-surface-dynamic);
  color: var(--color-text-faint);
  border: none;
  cursor: not-allowed;
  pointer-events: none;
}
.btn-disabled:hover {
  transform: none;
}

.btn-amazon {
  background: var(--color-text);
  color: #fff;
  border: none;
}
.btn-amazon:hover {
  opacity: 0.9;
  box-shadow: var(--shadow-md);
}

.btn-spotify {
  background: var(--color-surface-dynamic);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}
.btn-spotify:hover {
  background: var(--color-surface-2);
  box-shadow: var(--shadow-md);
}
.btn-icon {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.error-message {
  display: none;
  color: var(--color-error);
  font-size: var(--text-xs);
  margin-top: var(--space-3);
}

/* Success state */
.success-section {
  display: none;
}
.success-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto var(--space-4);
  background: var(--color-primary-highlight);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
}
.success-title {
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-2);
  color: var(--color-text);
}
.success-text {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

.fade-in-up {
  animation: fadeInUp 0.5s cubic-bezier(0.16, 1, 0.3, 1) both;
}
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ─── Purchase Section ─── */
.purchase-section {
  padding: clamp(var(--space-10), 6vw, var(--space-20)) var(--space-6);
  text-align: center;
}
.purchase-inner {
  max-width: var(--content-narrow);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
}
.launch-date {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  letter-spacing: 0.03em;
}
.countdown {
  display: flex;
  gap: var(--space-6);
  justify-content: center;
}
.countdown-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
}
.countdown-num {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  min-width: 2ch;
  text-align: center;
}
.countdown-label {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.notify-label {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}
.notify-form {
  display: flex;
  gap: var(--space-3);
  max-width: 440px;
  width: 100%;
}
.notify-form .subscribe-input {
  flex: 1;
}
.notify-success {
  display: none;
  font-size: var(--text-sm);
  color: var(--color-primary);
  font-weight: 500;
}
.purchase-buttons {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  justify-content: center;
}
.purchase-note {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

/* ─── About Book Section ─── */
.about-book {
  padding: clamp(var(--space-12), 8vw, var(--space-24)) var(--space-6);
}
.about-book-centered {
  max-width: var(--content-default);
  margin: 0 auto;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
}
.about-book-body {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ─── Standalone Quote Section ─── */
.quote-section {
  padding: clamp(var(--space-12), 8vw, var(--space-20)) var(--space-6);
  text-align: center;
}
.quote-section-inner {
  max-width: var(--content-default);
  margin: 0 auto;
}
.quote-section .quote-large {
  font-size: var(--text-2xl);
  font-style: italic;
  color: var(--color-text);
  line-height: 1.35;
  font-weight: 400;
  margin-bottom: var(--space-4);
}
.quote-section .quote-large::before { content: "\201C"; }
.quote-section .quote-large::after { content: "\201D"; }
.quote-section .quote-attribution {
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-faint);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* ─── About Author Section ─── */
.about-author {
  padding: clamp(var(--space-12), 8vw, var(--space-24)) var(--space-6);
}
.about-author-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: clamp(var(--space-8), 5vw, var(--space-16));
  align-items: start;
}
.author-photo-wrapper {
  position: sticky;
  top: calc(var(--space-16) + var(--space-8));
}
.author-photo {
  width: 240px;
  height: 240px;
  border-radius: var(--radius-xl);
  object-fit: cover;
  box-shadow: var(--shadow-md);
}
.author-text {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

/* "Sobre el autor" — same color as hero title */
.author-section-title {
  font-size: var(--text-2xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

.author-bio {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.75;
}
.author-bio p + p {
  margin-top: var(--space-4);
}

/* ─── Read CTA Section ─── */
.read-cta-section {
  padding: clamp(var(--space-12), 8vw, var(--space-20)) var(--space-6);
  text-align: center;
}
.read-cta-inner {
  max-width: var(--content-narrow);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
}
.read-cta-text {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.6;
}
.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
}

/* ─── Social Links ─── */
.social-section {
  padding: var(--space-6) var(--space-6) var(--space-8);
  text-align: center;
}
.social-inner {
  max-width: var(--content-narrow);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-6);
}
.social-links {
  display: flex;
  gap: var(--space-4);
  align-items: center;
  flex-wrap: wrap;
  justify-content: center;
}
.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  transition: color var(--transition-interactive),
              background var(--transition-interactive);
  text-decoration: none;
}
.social-link:hover {
  color: var(--color-text);
  background: var(--color-surface-2);
}
.social-link svg {
  width: 20px;
  height: 20px;
}

/* ─── Footer ─── */
.footer {
  padding: var(--space-4) var(--space-6) var(--space-8);
  text-align: center;
}
.footer-content {
  max-width: var(--content-default);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.footer-text {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}
.footer-text a {
  color: var(--color-text-muted);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition-interactive);
}
.footer-text a:hover {
  color: var(--color-primary);
}

/* ─── Scroll Reveal ─── */
.reveal {
  opacity: 1;
}
@supports (animation-timeline: scroll()) {
  .reveal {
    opacity: 0;
    animation: revealFade linear both;
    animation-timeline: view();
    animation-range: entry 0% entry 80%;
  }
}
@keyframes revealFade {
  to { opacity: 1; }
}
.reveal.js-reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal.js-reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ─── Responsive ─── */
@media (max-width: 768px) {
  .hero {
    padding: var(--space-10) var(--space-4);
    padding-bottom: var(--space-12);
  }
  .hero-inner {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--space-8);
  }
  .hero-book {
    order: -1;
  }
  .book-cover {
    width: clamp(180px, 45vw, 260px);
  }
  .book-cover:hover {
    transform: none;
  }
  .hero-content {
    align-items: center;
  }
  .hero-description {
    text-align: center;
  }

  .subscribe-form {
    flex-direction: column;
  }
  .subscribe-input {
    width: 100%;
  }

  .about-author-inner {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .author-photo-wrapper {
    position: static;
    display: flex;
    justify-content: center;
  }
  .author-photo {
    width: 200px;
    height: 200px;
  }
  .author-text {
    align-items: center;
  }
  .author-bio {
    text-align: left;
  }
}

@media (max-width: 480px) {
  .book-cover {
    width: clamp(160px, 50vw, 220px);
  }
  .author-photo {
    width: 160px;
    height: 160px;
  }
}