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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: #f5f7fa;
  min-height: 100vh;
  color: #2d3748;
}

/* Header Modern */
header {
  background: white;
  padding: 1.5rem 2rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
  position: sticky;
  top: 0;
  z-index: 100;
  animation: slideDown 0.5s ease;
}

@keyframes slideDown {
  from {
    transform: translateY(-100%);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.header-content {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
  flex-wrap: wrap;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

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

h1 {
  color: #1a202c;
  font-size: 1.5rem;
  font-weight: 700;
}

.header-stats {
  display: flex;
  gap: 2rem;
}

.stat-item {
  text-align: center;
}

.stat-number {
  font-size: 1.75rem;
  font-weight: 700;
  color: #4a5568;
}

.stat-label {
  font-size: 0.75rem;
  color: #718096;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-top: 0.25rem;
}

/* Main Container */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 2rem;
}

/* Sidebar & Main Layout */
.main-layout {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 2rem;
  align-items: start;
}

/* Sidebar Form */
.sidebar {
  position: sticky;
  top: 100px;
}

.form-card {
  background: white;
  border-radius: 16px;
  padding: 2rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
  animation: fadeInLeft 0.6s ease;
}

@keyframes fadeInLeft {
  from {
    transform: translateX(-30px);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

.form-card h2 {
  font-size: 1.25rem;
  margin-bottom: 1.5rem;
  color: #1a202c;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: #4a5568;
  font-size: 0.875rem;
}

input[type="text"],
input[type="number"],
select {
  width: 100%;
  padding: 0.75rem;
  border: 2px solid #e2e8f0;
  border-radius: 10px;
  font-size: 0.95rem;
  transition: all 0.2s ease;
  background: #f7fafc;
}

input[type="text"]:focus,
input[type="number"]:focus,
select:focus {
  outline: none;
  border-color: #4a5568;
  background: white;
  box-shadow: 0 0 0 3px rgba(74, 85, 104, 0.1);
}

.checkbox-wrapper {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem;
  background: #f7fafc;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.checkbox-wrapper:hover {
  background: #edf2f7;
}

.checkbox-wrapper label {
  margin: 0;
  cursor: pointer;
}

input[type="checkbox"] {
  width: 18px;
  height: 18px;
  cursor: pointer;
}

button#bookSubmit {
  background: #2d3748;
  color: white;
  border: none;
  padding: 0.875rem;
  border-radius: 10px;
  cursor: pointer;
  width: 100%;
  font-size: 0.95rem;
  font-weight: 600;
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px rgba(45, 55, 72, 0.3);
}

button#bookSubmit:hover {
  background: #1a202c;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(45, 55, 72, 0.4);
}

button#bookSubmit:active {
  transform: translateY(0);
}

/* Quick Stats Cards */
.quick-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.quick-stat-card {
  background: white;
  padding: 1.25rem;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
  border-left: 4px solid #cbd5e0;
  transition: all 0.3s ease;
}

.quick-stat-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
}

.quick-stat-card.total {
  border-left-color: #4a5568;
}

.quick-stat-card.reading {
  border-left-color: #ed8936;
}

.quick-stat-card.completed {
  border-left-color: #48bb78;
}

.quick-stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: #2d3748;
}

.quick-stat-label {
  font-size: 0.875rem;
  color: #718096;
  margin-top: 0.25rem;
}

/* Control Panel */
.control-panel {
  background: white;
  padding: 1.5rem;
  border-radius: 16px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
  margin-bottom: 2rem;
  animation: fadeIn 0.6s ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.control-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
  gap: 1rem;
}

.control-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: #1a202c;
}

.view-toggle {
  display: flex;
  gap: 0.5rem;
  background: #f7fafc;
  padding: 0.25rem;
  border-radius: 10px;
}

.view-btn {
  padding: 0.5rem 1rem;
  border: none;
  background: transparent;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 500;
  color: #718096;
  transition: all 0.2s ease;
  font-size: 0.875rem;
}

.view-btn.active {
  background: white;
  color: #2d3748;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* Search & Filter Row */
.search-filter-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1rem;
  align-items: center;
}

.search-wrapper {
  position: relative;
}

.search-icon {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: #a0aec0;
  font-size: 1.1rem;
}

.clear-search {
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  background: #e2e8f0;
  border: none;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  color: #4a5568;
  font-size: 0.875rem;
}

.clear-search:hover {
  background: #cbd5e0;
}

.search-input {
  width: 100%;
  padding: 0.875rem 3rem;
  border: 2px solid #e2e8f0;
  border-radius: 12px;
  font-size: 0.95rem;
  transition: all 0.2s ease;
  background: #f7fafc;
}

.search-input:focus {
  outline: none;
  border-color: #4a5568;
  background: white;
  box-shadow: 0 0 0 3px rgba(74, 85, 104, 0.1);
}

.filter-dropdown {
  position: relative;
}

.filter-btn {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 1.25rem;
  background: #f7fafc;
  border: 2px solid #e2e8f0;
  border-radius: 12px;
  cursor: pointer;
  font-weight: 500;
  color: #4a5568;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.filter-btn:hover {
  background: #edf2f7;
  border-color: #cbd5e0;
}

.filter-menu {
  position: absolute;
  top: calc(100% + 0.5rem);
  right: 0;
  background: white;
  border-radius: 12px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
  padding: 0.5rem;
  min-width: 200px;
  display: none;
  z-index: 10;
}

.filter-menu.active {
  display: block;
  animation: dropDown 0.3s ease;
}

@keyframes dropDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.filter-option {
  padding: 0.75rem 1rem;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: #4a5568;
}

.filter-option:hover {
  background: #f7fafc;
}

.filter-option.active {
  background: #edf2f7;
  color: #2d3748;
  font-weight: 600;
}

.sort-dropdown {
  position: relative;
}

/* Books Grid */
.books-section {
  animation: fadeInUp 0.6s ease;
}

@keyframes fadeInUp {
  from {
    transform: translateY(20px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 2px solid #e2e8f0;
}

.section-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: #1a202c;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.section-count {
  background: #edf2f7;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.875rem;
  color: #4a5568;
  font-weight: 600;
}

.books-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.books-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 3rem;
}

/* Book Card */
.book-card {
  background: white;
  border-radius: 14px;
  padding: 1.5rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border: 2px solid transparent;
  position: relative;
  overflow: hidden;
  animation: scaleIn 0.4s ease;
}

@keyframes scaleIn {
  from {
    transform: scale(0.95);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}

.book-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: #cbd5e0;
  transition: all 0.3s ease;
}

.book-card.reading::before {
  background: #ed8936;
}

.book-card.completed::before {
  background: #48bb78;
}

.book-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.12);
  border-color: #e2e8f0;
}

.book-header {
  display: flex;
  justify-content: space-between;
  align-items: start;
  margin-bottom: 1rem;
  gap: 1rem;
}

.book-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: #1a202c;
  margin: 0;
  line-height: 1.4;
}

.book-status {
  font-size: 1.25rem;
  flex-shrink: 0;
}

.book-author {
  color: #718096;
  font-size: 0.9rem;
  margin: 0.5rem 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.book-meta {
  display: flex;
  gap: 1rem;
  margin: 1rem 0;
  flex-wrap: wrap;
}

.meta-badge {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  background: #f7fafc;
  padding: 0.4rem 0.75rem;
  border-radius: 8px;
  font-size: 0.85rem;
  color: #4a5568;
  font-weight: 500;
}

.book-actions {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.75rem;
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid #e2e8f0;
}

.btn {
  padding: 0.625rem 1rem;
  border: none;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.btn-toggle {
  background: #edf2f7;
  color: #2d3748;
}

.btn-toggle:hover {
  background: #e2e8f0;
  transform: translateY(-2px);
}

.btn-delete {
  background: #feb2b2;
  color: #742a2a;
  width: 40px;
  padding: 0.625rem;
}

.btn-delete:hover {
  background: #fc8181;
  transform: translateY(-2px);
}

/* List View */
.book-card.list-view {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1.5rem;
  padding: 1.25rem 1.5rem;
}

.book-card.list-view .book-header {
  margin: 0;
}

.book-card.list-view .book-meta {
  margin: 0;
}

.book-card.list-view .book-actions {
  border: none;
  padding: 0;
  margin: 0;
  display: flex;
  gap: 0.5rem;
}

/* Empty State */
.empty-state {
  text-align: center;
  padding: 4rem 2rem;
  color: #a0aec0;
}

.empty-icon {
  font-size: 4rem;
  margin-bottom: 1rem;
  opacity: 0.5;
}

.empty-text {
  font-size: 1.125rem;
  font-weight: 500;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: white;
  padding: 1rem 1.5rem;
  border-radius: 12px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  transform: translateX(400px);
  transition: transform 0.3s ease;
  z-index: 1000;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  border-left: 4px solid #48bb78;
}

.toast.show {
  transform: translateX(0);
}

.toast.error {
  border-left-color: #f56565;
}

.toast-icon {
  font-size: 1.5rem;
}

.toast-message {
  color: #2d3748;
  font-weight: 500;
}

/* Responsive */
@media (max-width: 1200px) {
  .main-layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
  }

  .books-grid {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  }
}

@media (max-width: 768px) {
  .container {
    padding: 1rem;
  }

  .header-content {
    flex-direction: column;
    align-items: flex-start;
  }

  .header-stats {
    width: 100%;
    justify-content: space-around;
  }

  .quick-stats {
    grid-template-columns: 1fr;
  }

  .search-filter-row {
    grid-template-columns: 1fr;
  }

  .control-header {
    flex-direction: column;
    align-items: flex-start;
  }

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

  .book-card.list-view {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .book-card.list-view .book-actions {
    grid-template-columns: 1fr;
  }

  .toast {
    bottom: 1rem;
    right: 1rem;
    left: 1rem;
  }
}

/* Loading Animation */
@keyframes shimmer {
  0% { background-position: -1000px 0; }
  100% { background-position: 1000px 0; }
}

.skeleton {
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 1000px 100%;
  animation: shimmer 2s infinite;
  border-radius: 8px;
}