/**
 * READING CLUB STYLES
 * 
 * Premium, elegant styles for:
 * - Session archive (index.html)
 * - Session detail pages (session.html)
 * 
 * Complements existing book-reading/assets/styles.css
 */

/* ============================================================
   BACK TO HOME BUTTON (both pages)
   ============================================================ */

.back-to-home {
  position: fixed;
  bottom: 20px;
  right: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  background: rgba(255, 251, 246, 0.95);
  border: 1px solid rgba(26, 77, 46, 0.12);
  border-radius: 999px;
  color: #1a4d2e;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  z-index: 999;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.back-to-home:hover {
  background: rgba(255, 251, 246, 0.98);
  transform: translateY(-2px);
}

@media (max-width: 768px) {
  .back-to-home {
    bottom: 12px;
    right: 12px;
    padding: 8px 14px;
    font-size: 0.85rem;
  }

  .back-to-home-text {
    display: none;
  }

  .back-to-home i {
    font-size: 1rem;
  }
}

/* ============================================================
   SESSION ARCHIVE (index.html)
   ============================================================ */

.session-archive {
  margin: 64px 0;
}

.session-archive-heading {
  text-align: center;
  margin-bottom: 48px;
}

.session-archive-heading .eyebrow {
  margin-bottom: 12px;
}

.session-archive-heading h2 {
  font-size: clamp(1.8rem, 5vw, 2.8rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin: 0 0 16px;
}

.session-archive-heading p {
  color: var(--muted);
  font-size: 1.1rem;
  line-height: 1.6;
  max-width: 600px;
  margin: 0 auto;
}

.session-cards-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 28px;
  margin-top: 48px;
}

/* Individual Session Card */
.session-card {
  display: flex;
  flex-direction: column;
  padding: 32px;
  border-radius: var(--radius-lg);
  transition: all 0.35s cubic-bezier(0.165, 0.84, 0.44, 1);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  background: var(--surface-strong);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.session-card::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(to bottom, var(--accent), var(--accent-2));
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.4s ease;
}

.session-card:hover::before {
  transform: scaleY(1);
}

.session-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 24px 60px rgba(28, 25, 23, 0.15);
  border-color: var(--accent-2);
}

.session-card:hover a {
  color: var(--accent);
}

/* Session Date */
.session-date {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

.session-date::before {
  content: '📅';
}

/* Session Number */
.session-number {
  font-size: 3.2rem;
  font-weight: 800;
  line-height: 1;
  color: var(--accent);
  margin-bottom: 8px;
  letter-spacing: -0.02em;
}

.session-number span {
  font-size: 1rem;
  font-weight: 500;
  display: block;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-top: 4px;
}

/* Session Title */
.session-card h3 {
  font-size: 1.4rem;
  font-weight: 700;
  line-height: 1.4;
  margin: 16px 0 12px;
  color: var(--text);
}

/* Session Description */
.session-description {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--muted);
  margin-bottom: 20px;
  flex-grow: 1;
}

/* Session Coverage */
.session-coverage {
  margin: 24px 0;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

.session-coverage-heading {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 12px;
  display: block;
}

.session-coverage-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.session-coverage-item {
  font-size: 0.9rem;
  line-height: 1.4;
  color: var(--text);
  padding-left: 14px;
  position: relative;
}

.session-coverage-item::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: bold;
}

/* Read Session Notes Link */
.session-card a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
  margin-top: auto;
  transition: all 0.3s ease;
}

.session-card a::after {
  content: '→';
  transition: transform 0.3s ease;
}

.session-card:hover a::after {
  transform: translateX(4px);
}

/* Responsive: Mobile */
@media (max-width: 768px) {
  .session-archive {
    margin: 48px 0;
  }

  .session-archive-heading {
    margin-bottom: 32px;
  }

  .session-archive-heading h2 {
    font-size: 2rem;
  }

  .session-cards-container {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .session-card {
    padding: 24px;
  }

  .session-number {
    font-size: 2.4rem;
  }

  .session-card h3 {
    font-size: 1.25rem;
  }

  .session-coverage-list {
    gap: 8px;
  }

  .session-coverage-item {
    font-size: 0.85rem;
  }
}

/* ============================================================
   SESSION DETAIL PAGE (session.html)
   ============================================================ */

.session-detail {
  max-width: 900px;
  margin: 0 auto;
}

/* Session Header */
.session-header {
  text-align: center;
  margin-bottom: 64px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--border);
}

.session-header-breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  font-size: 0.9rem;
  color: var(--muted);
  margin-bottom: 24px;
}

.session-header-breadcrumb a {
  color: var(--accent);
  text-decoration: none;
  transition: opacity 0.3s ease;
}

.session-header-breadcrumb a:hover {
  opacity: 0.8;
}

.session-header-number {
  font-size: 4.4rem;
  font-weight: 800;
  line-height: 1;
  color: var(--accent);
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.session-header-date {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 20px;
}

.session-header-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.02em;
  margin: 0 0 24px;
}

.session-header-book-info {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  font-size: 1.05rem;
  color: var(--text);
  flex-wrap: wrap;
}

.session-header-book-info strong {
  color: var(--accent);
}

/* Share Button */
.session-share-button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 24px;
  padding: 10px 18px;
  border: 1.5px solid var(--accent);
  background: transparent;
  color: var(--accent);
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.3s ease;
  text-decoration: none;
}

.session-share-button:hover {
  background: var(--accent);
  color: white;
}

.session-share-button::before {
  content: '✦';
}

/* Session Section */
.session-section {
  margin-bottom: 56px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--border);
}

.session-section:last-of-type {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.session-section h2 {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--accent);
  display: inline-block;
  letter-spacing: -0.01em;
}

.session-section h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-top: 28px;
  margin-bottom: 12px;
  color: var(--accent);
  letter-spacing: 0.05em;
}

.session-section p {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text);
  margin-bottom: 16px;
}

.session-section ul,
.session-section ol {
  margin: 16px 0;
  padding-left: 24px;
}

.session-section li {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text);
  margin-bottom: 8px;
}

.session-section strong {
  color: var(--accent);
  font-weight: 700;
}

.session-section em {
  color: var(--muted);
  font-style: italic;
}

/* Session Coverage in Detail Page */
.session-detail-coverage {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
  margin: 24px 0;
}

.session-detail-coverage-item {
  padding: 16px;
  background: rgba(255, 251, 246, 0.5);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--accent);
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--text);
}

/* Blockquote/Highlight */
.session-highlight {
  padding: 24px;
  margin: 32px 0;
  background: linear-gradient(135deg, rgba(26, 77, 46, 0.08), rgba(79, 121, 66, 0.06));
  border-left: 4px solid var(--accent);
  border-radius: var(--radius-md);
  font-style: italic;
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--text);
}

.session-highlight strong {
  font-weight: 700;
  color: var(--accent);
  font-style: normal;
}

/* Questions Section */
.session-questions {
  background: var(--surface-strong);
  padding: 32px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  margin: 40px 0;
}

.session-questions h3 {
  margin-top: 0;
  border: none;
  padding: 0;
  color: var(--accent);
}

.session-question-item {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

.session-question-item:first-of-type {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.session-question-item strong {
  display: block;
  margin-bottom: 8px;
  color: var(--text);
}

.session-question-item p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Navigation */
.session-navigation {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 16px;
  align-items: center;
  margin-top: 56px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}

.session-nav-link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 18px;
  border-radius: var(--radius-md);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: all 0.3s ease;
  border: 1px solid var(--accent);
  color: var(--accent);
}

.session-nav-link:hover {
  background: var(--accent);
  color: white;
  transform: translateY(-2px);
}

.session-nav-prev {
  justify-self: start;
}

.session-nav-prev::before {
  content: '←';
  margin-right: 4px;
}

.session-nav-next {
  justify-self: end;
}

.session-nav-next::after {
  content: '→';
  margin-left: 4px;
}

.session-nav-middle {
  text-align: center;
}

.session-nav-middle a {
  padding: 10px 20px;
  background: var(--accent);
  color: white;
  border: 1px solid var(--accent);
  border-radius: var(--radius-md);
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s ease;
  display: inline-block;
}

.session-nav-middle a:hover {
  opacity: 0.9;
  transform: translateY(-2px);
}

/* Back to Archive Button */
.back-to-archive {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 40px;
  padding: 12px 18px;
  background: var(--accent);
  color: white;
  border-radius: var(--radius-md);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: all 0.3s ease;
}

.back-to-archive:hover {
  opacity: 0.9;
  transform: translateY(-2px);
}

.back-to-archive::before {
  content: '←';
  margin-right: 4px;
}

/* Responsive: Mobile Detail Page */
@media (max-width: 768px) {
  .session-detail {
    padding: 0 16px;
  }

  .session-header {
    margin-bottom: 40px;
    padding-bottom: 32px;
  }

  .session-header-number {
    font-size: 3rem;
  }

  .session-header-title {
    font-size: 1.6rem;
  }

  .session-section h2 {
    font-size: 1.4rem;
  }

  .session-section h3 {
    font-size: 1.1rem;
    margin-top: 20px;
  }

  .session-detail-coverage {
    grid-template-columns: 1fr;
  }

  .session-header-breadcrumb {
    font-size: 0.8rem;
    flex-wrap: wrap;
  }

  .session-navigation {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .session-nav-link {
    width: 100%;
    justify-content: center;
  }

  .session-nav-prev {
    justify-self: auto;
  }

  .session-nav-next {
    justify-self: auto;
  }

  .session-highlight {
    padding: 18px;
    font-size: 1rem;
  }

  .session-questions {
    padding: 20px;
  }
}

/* ============================================================
   GLIMPSES GALLERY (index.html)
   ============================================================ */

.glimpses-section {
  margin: 72px 0;
}

.glimpses-section .section-heading {
  text-align: center;
  margin-bottom: 28px;
}

.glimpses-section .section-heading h2 {
  font-size: clamp(1.7rem, 4.4vw, 2.4rem);
  line-height: 1.2;
  margin-bottom: 10px;
}

.section-subtitle {
  max-width: 760px;
  margin: 0 auto;
  color: var(--muted);
  font-size: 1.02rem;
  line-height: 1.7;
}

.glimpses-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  align-items: start;
  margin-top: 28px;
}

.glimpses-card {
  position: relative;
  overflow: hidden;
  border-radius: 22px;
  background: var(--surface-strong);
  border: 1px solid rgba(26, 77, 46, 0.08);
  box-shadow: 0 12px 30px rgba(33, 28, 20, 0.08);
  cursor: pointer;
  transition: transform 0.35s ease, box-shadow 0.35s ease, opacity 0.5s ease;
  opacity: 0;
  transform: translateY(18px);
}

.glimpses-card.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.glimpses-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 34px rgba(33, 28, 20, 0.12);
}

.glimpses-card img {
  width: 100%;
  height: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  display: block;
  transition: transform 0.55s ease;
}

.glimpses-card:hover img {
  transform: scale(1.05);
}

.glimpses-card:nth-child(3n + 2) {
  margin-top: 18px;
}

.glimpses-card:nth-child(4n) {
  margin-top: 8px;
}

.glimpses-card-caption {
  position: absolute;
  inset: auto 12px 12px 12px;
  padding: 10px 12px;
  border-radius: 16px;
  background: rgba(255, 251, 246, 0.72);
  backdrop-filter: blur(10px);
  color: var(--text);
  font-size: 0.86rem;
  line-height: 1.4;
  border: 1px solid rgba(26, 77, 46, 0.08);
}

.glimpses-card-caption strong {
  display: block;
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 4px;
}

.glimpses-card--tall img {
  aspect-ratio: 4 / 5.7;
}

.glimpses-card--wide img {
  aspect-ratio: 4 / 4.2;
}

/* Lightbox modal */
.glimpses-lightbox {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(18, 18, 16, 0.78);
  backdrop-filter: blur(8px);
}

.glimpses-lightbox.is-open {
  display: flex;
}

.glimpses-lightbox-dialog {
  width: min(980px, 100%);
  position: relative;
}

.glimpses-lightbox-image {
  width: 100%;
  max-height: 82vh;
  object-fit: contain;
  border-radius: 22px;
  background: #fff;
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.28);
}

.glimpses-lightbox-close {
  position: absolute;
  top: -12px;
  right: -12px;
  width: 42px;
  height: 42px;
  border: 0;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  font-size: 1.15rem;
  cursor: pointer;
  box-shadow: 0 8px 20px rgba(26, 77, 46, 0.28);
}

.glimpses-lightbox-caption {
  margin-top: 14px;
  color: rgba(255, 255, 255, 0.9);
  text-align: center;
  font-size: 0.98rem;
  line-height: 1.6;
}

.glimpses-lightbox-caption strong {
  display: block;
  margin-bottom: 4px;
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #fff;
}

body.no-scroll {
  overflow: hidden;
}

@media (max-width: 1024px) {
  .glimpses-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 768px) {
  .glimpses-section {
    margin: 56px 0;
  }

  .glimpses-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .glimpses-card,
  .glimpses-card:nth-child(3n + 2),
  .glimpses-card:nth-child(4n) {
    margin-top: 0;
  }

  .glimpses-card img,
  .glimpses-card--tall img,
  .glimpses-card--wide img {
    aspect-ratio: 4 / 3.2;
  }

  .glimpses-card-caption {
    inset: auto 10px 10px 10px;
    padding: 9px 10px;
    font-size: 0.84rem;
  }

  .glimpses-lightbox {
    padding: 16px;
  }

  .glimpses-lightbox-close {
    top: -10px;
    right: -10px;
  }
}

/* ============================================================
   LOADING & EMPTY STATES
   ============================================================ */

.session-loading {
  text-align: center;
  padding: 64px 24px;
  color: var(--muted);
}

.session-loading-spinner {
  display: inline-block;
  width: 40px;
  height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-bottom: 16px;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.session-not-found {
  text-align: center;
  padding: 64px 24px;
}

.session-not-found h2 {
  font-size: 2rem;
  color: var(--text);
  margin-bottom: 16px;
}

.session-not-found p {
  color: var(--muted);
  font-size: 1.05rem;
  margin-bottom: 32px;
}

.session-not-found a {
  display: inline-block;
  padding: 12px 24px;
  background: var(--accent);
  color: white;
  border-radius: var(--radius-md);
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s ease;
}

.session-not-found a:hover {
  opacity: 0.9;
  transform: translateY(-2px);
}