/* ============================================
   BOOK LIST STYLES - COLOR SCHEME
   ============================================ */

/* CSS Variables - Matching ds.css Color Scheme */
:root {
  /* Colors */
  --accent1: #eb6f92;
  --accent2: #9ccfd8;
  --accent3: #f6c177;
  --bg-dark: #191724;
  --bg-surface: #1f1d2e;
  --text-light: #e0def4;
  --text-gray: #908caa;
  --border-color: #26233a;

  /* Typography */
  --font-display: "Playfair Display", serif;
  --font-body: "Crimson Pro", serif;
}

/* ============================================
   GLOBAL STYLES
   ============================================ */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-body);
  background: var(--bg-dark);
  color: var(--text-light);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ============================================
   BACKGROUND DECORATIONS
   ============================================ */

.bg-decoration {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(
      circle at 20% 50%,
      rgba(235, 111, 146, 0.1) 0%,
      transparent 50%
    ),
    radial-gradient(
      circle at 80% 80%,
      rgba(156, 207, 216, 0.1) 0%,
      transparent 50%
    );
  pointer-events: none;
  z-index: 0;
}

.grain-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
  opacity: 0.03;
  pointer-events: none;
  z-index: 1;
}

/* ============================================
   HEADER SECTION
   ============================================ */

.page-header {
  position: relative;
  z-index: 2;
  background: linear-gradient(
    135deg,
    var(--bg-surface) 0%,
    var(--bg-dark) 100%
  );
  border-bottom: 2px solid var(--border-color);
  padding: 80px 40px 60px;
  text-align: center;
}

.header-content {
  max-width: 900px;
  margin: 0 auto;
}

.logo-section {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  margin-bottom: 20px;
}

.logo-icon {
  font-size: 3.5rem;
  color: var(--accent1);
  animation: floatIcon 3s ease-in-out infinite;
}

@keyframes floatIcon {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

.logo-text {
  text-align: left;
}

.logo-subtitle {
  display: block;
  font-size: 0.95rem;
  color: var(--text-gray);
  font-weight: 400;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.logo-title {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 900;
  color: var(--text-light);
  margin: 0;
  line-height: 1;
  background: linear-gradient(135deg, var(--accent1), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.header-description {
  font-size: 1.15rem;
  color: var(--text-gray);
  max-width: 700px;
  margin: 0 auto;
  line-height: 1.8;
}

/* ============================================
   CONTAINER
   ============================================ */

.container {
  position: relative;
  z-index: 2;
  max-width: 1400px;
  margin: 0 auto;
  padding: 60px 40px 100px;
}

/* ============================================
   FILTER SECTION
   ============================================ */

.filter-section {
  display: flex;
  justify-content: center;
  gap: 15px;
  margin-bottom: 60px;
  flex-wrap: wrap;
}

.filter-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 28px;
  background: var(--bg-surface);
  border: 2px solid var(--border-color);
  border-radius: 50px;
  color: var(--text-light);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
}

.filter-btn:hover {
  background: rgba(235, 111, 146, 0.1);
  border-color: var(--accent1);
  color: var(--accent1);
  transform: translateY(-2px);
}

.filter-btn.active {
  background: linear-gradient(135deg, var(--accent1), var(--accent2));
  border-color: var(--accent1);
  color: var(--bg-dark);
  box-shadow: 0 5px 20px rgba(235, 111, 146, 0.3);
}

.filter-btn .count {
  background: rgba(255, 255, 255, 0.2);
  padding: 2px 10px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 700;
}

.filter-btn.active .count {
  background: rgba(25, 23, 36, 0.3);
  color: var(--bg-dark);
}

/* ============================================
   BOOKS GRID
   ============================================ */

.books-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
  gap: 40px;
  margin-bottom: 80px;
}

.book-card {
  position: relative;
  background: var(--bg-surface);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  overflow: hidden;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  animation: fadeInUp 0.6s ease;
}

.book-card:hover {
  transform: translateY(-8px);
  border-color: var(--accent1);
  box-shadow: 0 20px 50px rgba(235, 111, 146, 0.2);
}

.book-card.hidden {
  display: none;
}

/* Book Ribbon */
.book-ribbon {
  position: absolute;
  top: 20px;
  right: -35px;
  background: linear-gradient(135deg, var(--accent2), var(--accent1));
  color: var(--bg-dark);
  padding: 8px 45px;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  transform: rotate(45deg);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
  z-index: 10;
}

.book-ribbon.upcoming {
  background: linear-gradient(135deg, var(--accent3), var(--accent1));
}

/* Book Spine */
.book-spine {
  position: absolute;
  left: 0;
  top: 0;
  width: 6px;
  height: 100%;
  background: linear-gradient(180deg, var(--accent1), var(--accent2));
}

/* Book Content */
.book-content {
  padding: 40px 35px;
  position: relative;
}

.book-number {
  position: absolute;
  top: 20px;
  right: 30px;
  font-family: var(--font-display);
  font-size: 5rem;
  font-weight: 900;
  color: var(--accent1);
  opacity: 0.5;
  line-height: 1;
  transition: all 0.3s ease;
}

.book-icon {
  width: 70px;
  height: 70px;
  background: linear-gradient(135deg, var(--accent1), var(--accent2));
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 25px;
}

.book-icon i {
  font-size: 2rem;
  color: var(--bg-dark);
}

.book-title {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-light);
  margin-bottom: 10px;
  line-height: 1.3;
}

.book-subtitle {
  font-size: 1.05rem;
  color: var(--accent2);
  font-weight: 500;
  margin-bottom: 20px;
}

.book-description {
  font-size: 1rem;
  color: var(--text-gray);
  line-height: 1.8;
  margin-bottom: 25px;
}

/* Book Meta */
.book-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin-bottom: 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-color);
}

.meta-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--text-gray);
}

.meta-item i {
  color: var(--accent2);
  font-size: 0.95rem;
}

/* Book Topics */
.book-topics {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 30px;
}

.topic-tag {
  background: rgba(235, 111, 146, 0.1);
  border: 1px solid rgba(235, 111, 146, 0.3);
  color: var(--accent1);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  transition: all 0.3s ease;
}

.topic-tag:hover {
  background: var(--accent1);
  color: var(--bg-dark);
  transform: translateY(-2px);
}

/* Book Actions */
.book-actions {
  display: flex;
  gap: 12px;
}

.btn {
  flex: 1;
  padding: 14px 24px;
  border-radius: 10px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border: none;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent1), var(--accent2));
  color: var(--bg-dark);
  border: 2px solid transparent;
}

.btn-primary:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(235, 111, 146, 0.3);
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-secondary {
  background: transparent;
  color: var(--text-light);
  border: 2px solid var(--border-color);
}

.btn-secondary:hover {
  background: rgba(235, 111, 146, 0.1);
  border-color: var(--accent1);
  color: var(--accent1);
  transform: translateY(-2px);
}

/* ============================================
   NEWSLETTER SECTION
   ============================================ */

.newsletter-section {
  background: linear-gradient(
    135deg,
    var(--bg-surface) 0%,
    var(--bg-dark) 100%
  );
  border: 2px solid var(--border-color);
  border-radius: 20px;
  padding: 60px 40px;
  text-align: center;
  margin-bottom: 60px;
  position: relative;
  overflow: hidden;
}

.newsletter-section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(
    circle at 50% 50%,
    rgba(235, 111, 146, 0.05) 0%,
    transparent 70%
  );
  pointer-events: none;
}

.newsletter-content {
  position: relative;
  z-index: 1;
  max-width: 600px;
  margin: 0 auto;
}

.newsletter-icon {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--accent1), var(--accent2));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 25px;
}

.newsletter-icon i {
  font-size: 2rem;
  color: var(--bg-dark);
}

.newsletter-title {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--text-light);
  margin-bottom: 15px;
}

.newsletter-description {
  font-size: 1.05rem;
  color: var(--text-gray);
  margin-bottom: 30px;
  line-height: 1.8;
}

.newsletter-form {
  display: flex;
  gap: 12px;
  max-width: 500px;
  margin: 0 auto;
}

.newsletter-input {
  flex: 1;
  padding: 16px 24px;
  background: var(--bg-dark);
  border: 2px solid var(--border-color);
  border-radius: 10px;
  color: var(--text-light);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: all 0.3s ease;
}

.newsletter-input:focus {
  outline: none;
  border-color: var(--accent1);
  box-shadow: 0 0 0 4px rgba(235, 111, 146, 0.1);
}

.newsletter-input::placeholder {
  color: var(--text-gray);
}

.newsletter-btn {
  padding: 16px 32px;
  background: linear-gradient(135deg, var(--accent1), var(--accent2));
  color: var(--bg-dark);
  border: none;
  border-radius: 10px;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  transition: all 0.3s ease;
  white-space: nowrap;
}

.newsletter-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(235, 111, 146, 0.3);
}

/* ============================================
   FOOTER
   ============================================ */

.page-footer {
  position: relative;
  z-index: 2;
  background: var(--bg-surface);
  border-top: 2px solid var(--border-color);
  padding: 60px 40px 30px;
}

.footer-content {
  max-width: 1400px;
  margin: 0 auto 40px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 40px;
}

.footer-section h4 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  color: var(--text-light);
  margin-bottom: 20px;
}

.footer-section p {
  color: var(--text-gray);
  line-height: 1.8;
}

.footer-links {
  list-style: none;
  padding: 0;
}

.footer-links li {
  margin-bottom: 12px;
}

.footer-links a {
  color: var(--text-gray);
  text-decoration: none;
  transition: all 0.3s ease;
  display: inline-block;
}

.footer-links a:hover {
  color: var(--accent1);
  transform: translateX(5px);
}

.social-links {
  display: flex;
  gap: 15px;
}

.social-links a {
  width: 45px;
  height: 45px;
  background: var(--bg-dark);
  border: 2px solid var(--border-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-gray);
  font-size: 1.2rem;
  transition: all 0.3s ease;
  text-decoration: none;
}

.social-links a:hover {
  background: var(--accent1);
  border-color: var(--accent1);
  color: var(--bg-dark);
  transform: translateY(-3px);
}

.footer-bottom {
  text-align: center;
  padding-top: 30px;
  border-top: 1px solid var(--border-color);
  color: var(--text-gray);
  font-size: 0.9rem;
}

/* ============================================
   ANIMATIONS
   ============================================ */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 1200px) {
  .books-grid {
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 30px;
  }
}

@media (max-width: 900px) {
  .logo-title {
    font-size: 2.5rem;
  }

  .books-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .newsletter-form {
    flex-direction: column;
  }

  .newsletter-btn {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 600px) {
  .page-header {
    padding: 60px 20px 40px;
  }

  .container {
    padding: 40px 20px 60px;
  }

  .logo-section {
    flex-direction: column;
    gap: 15px;
  }

  .logo-text {
    text-align: center;
  }

  .logo-title {
    font-size: 2rem;
  }

  .header-description {
    font-size: 1rem;
  }

  .filter-section {
    gap: 10px;
  }

  .filter-btn {
    padding: 12px 20px;
    font-size: 0.9rem;
  }

  .book-content {
    padding: 30px 25px;
  }

  .book-number {
    font-size: 3.5rem;
    top: 15px;
    right: 20px;
  }

  .book-title {
    font-size: 1.5rem;
  }

  .book-actions {
    flex-direction: column;
  }

  .newsletter-section {
    padding: 40px 25px;
  }

  .newsletter-title {
    font-size: 1.8rem;
  }

  .page-footer {
    padding: 40px 20px 20px;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 30px;
  }
}

/* ============================================
   PRINT STYLES
   ============================================ */

@media print {
  .bg-decoration,
  .grain-overlay,
  .filter-section,
  .newsletter-section,
  .page-footer {
    display: none;
  }

  .book-card {
    page-break-inside: avoid;
    border: 1px solid #000;
  }
}