:root {
  --bg-color: #0d1117;
  --card-bg: #161b22;
  --card-border: #30363d;
  --text-main: #f0f6fc;
  --text-muted: #8b949e;
  --accent-blue: #3d74ff;
  --cardboard: #2d241e;
  --cardboard-accent: #4a3b31;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* Tag & Status Styles */
.tag-read {
  background: rgba(59, 130, 246, 0.2);
  color: #60a5fa;
  font-size: 0.75rem;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-weight: 600;
}

.tag-unread {
  background: rgba(245, 158, 11, 0.2);
  color: #fbbf24;
  font-size: 0.75rem;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-weight: 600;
}

.tag-owned {
  background: rgba(16, 185, 129, 0.15);
  color: #10b981;
  font-size: 0.75rem;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-weight: 600;
}

.tag-missing {
  background: rgba(239, 68, 68, 0.15);
  color: #ef4444;
  font-size: 0.75rem;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  font-weight: 600;
}

/* Modal Read Toggle Controls */
.read-status-box {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: #0d1117;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  border: 1px solid var(--card-border);
  margin-bottom: 1.5rem;
}

.toggle-btn {
  background: #21262d;
  color: var(--text-main);
  border: 1px solid var(--card-border);
  padding: 0.4rem 0.8rem;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.toggle-btn:hover {
  background: #30363d;
}

.toggle-btn.is-read {
  background: rgba(16, 185, 129, 0.2);
  color: #10b981;
  border-color: rgba(16, 185, 129, 0.4);
}

/* Header & Search Bar */
.app-header {
  background: rgba(22, 27, 34, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--card-border);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 1rem 2rem;
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}

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

.logo-icon {
  font-size: 2.2rem;
}

.brand h1 {
  font-family: 'Bebas Neue', cursive;
  font-size: 2rem;
  letter-spacing: 1px;
  line-height: 1;
}

.subtitle {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.search-bar {
  flex: 1;
  max-width: 400px;
  position: relative;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: 12px;
  color: var(--text-muted);
}

.search-bar input {
  width: 100%;
  padding: 0.6rem 1rem 0.6rem 2.5rem;
  background: #0d1117;
  border: 1px solid var(--card-border);
  border-radius: 8px;
  color: #fff;
  font-size: 0.95rem;
  transition: all 0.2s ease;
}

.search-bar input:focus {
  outline: none;
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px rgba(61, 116, 255, 0.25);
}

/* Circular Stats Ring */
.stats-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: #0d1117;
  padding: 0.5rem 1rem;
  border-radius: 12px;
  border: 1px solid var(--card-border);
}

.ring-container {
  position: relative;
  width: 68px;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.progress-ring circle {
  fill: transparent;
  stroke-width: 6;
}

.ring-bg {
  stroke: #21262d;
}

.ring-fill {
  stroke: var(--accent-blue);
  stroke-dasharray: 175.9;
  stroke-dashoffset: 175.9;
  transform: rotate(-90deg);
  transform-origin: 50% 50%;
  transition: stroke-dashoffset 0.8s ease-in-out;
  stroke-linecap: round;
}

.ring-text {
  position: absolute;
  font-weight: 700;
  font-size: 0.9rem;
}

.stats-details {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  font-size: 0.85rem;
}

.stats-details strong {
  color: #fff;
}

.stats-details span {
  color: var(--text-muted);
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-top: 0.2rem;
}

/* Main Container Layout */
.main-container {
  max-width: 1200px;
  margin: 2rem auto;
  padding: 0 1.5rem;
  width: 100%;
}

.section-title-bar {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 1.5rem;
}

.section-title-bar h2 {
  font-size: 1.5rem;
  font-weight: 700;
}

.hint-text {
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* Compact 3D Long Box Experience */
.longbox-perspective {
  perspective: 1000px;
  padding: 0.5rem 0; /* Reduced outer padding */
  display: flex;
  justify-content: center;
}

.longbox-3d {
  width: 100%;
  max-width: 720px;
  height: 380px; /* Reduced from 650px to a sleek, compact desktop height */
  background: var(--cardboard);
  border-radius: 12px;
  border: 4px solid var(--cardboard-accent);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.6);
  padding: 14px 16px;
  transform: rotateX(4deg); /* Very subtle tilt keeps perspective flat and readable */
  transform-style: preserve-3d;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform 0.3s ease;
}

.longbox-3d:hover {
  transform: rotateX(1deg) scale(1.002);
}

/* Compact Scrollable Interior */
.dividers-list {
  display: flex;
  flex-direction: column;
  gap: 6px; /* Tightened row gap */
  position: relative;
  z-index: 2;
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding-right: 6px;
  padding-bottom: 4px;
}

/* Custom Sleek Scrollbar */
.dividers-list::-webkit-scrollbar {
  width: 6px;
}

.dividers-list::-webkit-scrollbar-track {
  background: rgba(0, 0, 0, 0.2);
  border-radius: 4px;
}

.dividers-list::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.25);
  border-radius: 4px;
}

.dividers-list::-webkit-scrollbar-thumb:hover {
  background: var(--accent-blue);
}

/* Sleeker, Compact Divider Cards */
.divider-card {
  background: #21262d;
  border: 1px solid var(--card-border);
  border-left: 6px solid var(--accent-blue);
  border-radius: 6px;
  padding: 0.55rem 0.9rem; /* Slimmer padding reduces vertical bulk */
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
  transform: translateZ(0);
  transition: transform 0.2s ease, background-color 0.2s ease;
}

.divider-card:hover {
  transform: translateX(4px);
  background: #2d333b;
}

.divider-info h3 {
  font-size: 1rem; /* Slightly smaller text for compact layout */
  margin-bottom: 0.1rem;
}

.divider-info p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.box-front {
  margin-top: 8px;
  padding: 6px;
  background: var(--cardboard-accent);
  border-radius: 4px;
  text-align: center;
  border: 1px dashed rgba(255, 255, 255, 0.15);
  flex-shrink: 0;
}


.box-label {
  font-family: 'Bebas Neue', cursive;
  letter-spacing: 2px;
  color: rgba(255, 255, 255, 0.4);
  font-size: 1.1rem;
}

/* Opening Box Animations */
.longbox-3d.opening .divider-card:not(.selected) {
  opacity: 0;
  transform: translateY(50px) scale(0.8);
  transition: all 0.4s ease;
}

.longbox-3d.opening .divider-card.selected {
  transform: translateY(-10px) scale(1.02);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.8);
}

/* Tabletop Cover Fan View */
.tabletop-section {
  animation: fadeIn 0.5s ease forwards;
}

.tabletop-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--card-border);
}

.back-btn {
  background: #21262d;
  color: var(--text-main);
  border: 1px solid var(--card-border);
  padding: 0.6rem 1.2rem;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.back-btn:hover {
  background: #30363d;
  transform: translateX(-3px);
}

.series-meta {
  text-align: right;
}

.series-meta h2 {
  font-size: 1.8rem;
  font-weight: 800;
}

.series-meta p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.covers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 1.75rem;
  perspective: 1000px;
}

/* Comic Cover Card */
.cover-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 10px;
  overflow: hidden;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: transform 0.4s cubic-bezier(0.165, 0.84, 0.44, 1), box-shadow 0.4s ease;
}

.cover-card:hover {
  transform: translateY(-8px) rotateY(-3deg) scale(1.03);
  box-shadow: 0 15px 30px -5px rgba(0, 0, 0, 0.6);
  border-color: rgba(255, 255, 255, 0.2);
}

.cover-card.missing {
  filter: grayscale(100%);
  opacity: 0.55;
}

.cover-card.missing:hover {
  filter: grayscale(30%);
  opacity: 0.9;
}

.cover-image-container {
  aspect-ratio: 2 / 3;
  width: 100%;
  background: #090d11;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.cover-image-container img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.missing-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-muted);
  font-weight: 700;
}

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

.cover-details {
  padding: 0.8rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--card-bg);
}

.cover-number {
  font-weight: 700;
  font-size: 0.95rem;
}

/* Modal Darkening Overlay & Inspector */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(8px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  animation: fadeIn 0.25s ease;
}

.modal-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  max-width: 720px;
  width: 100%;
  position: relative;
  overflow: hidden;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.9);
}

.modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: rgba(0, 0, 0, 0.5);
  border: none;
  color: #fff;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.1rem;
  z-index: 10;
  transition: background 0.2s;
}

.modal-close:hover {
  background: rgba(255, 255, 255, 0.2);
}

.modal-body {
  display: flex;
  gap: 2rem;
  padding: 2rem;
}

@media (max-width: 640px) {
  .modal-body {
    flex-direction: column;
  }
}

.modal-cover-wrapper {
  flex: 0 0 240px;
  aspect-ratio: 2 / 3;
  border-radius: 8px;
  overflow: hidden;
  position: relative;
  box-shadow: 0 10px 20px rgba(0,0,0,0.5);
  background: #000;
}

.modal-cover-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.modal-status-pill {
  position: absolute;
  bottom: 10px;
  left: 10px;
  background: rgba(0,0,0,0.75);
  backdrop-filter: blur(4px);
  color: #fff;
  padding: 0.3rem 0.75rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
}

.modal-details {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.modal-details h2 {
  font-size: 1.8rem;
  margin-bottom: 0.5rem;
}

.modal-badge-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.badge {
  background: #21262d;
  color: var(--text-muted);
  border: 1px solid var(--card-border);
  padding: 0.3rem 0.75rem;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 500;
}

.modal-field {
  margin-bottom: 1.5rem;
}

.modal-field label {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 0.4rem;
}

.modal-field p {
  font-size: 0.95rem;
  line-height: 1.5;
  color: #e6edf3;
}

.modal-navigation {
  display: flex;
  gap: 1rem;
}

.nav-btn {
  flex: 1;
  background: #21262d;
  color: var(--text-main);
  border: 1px solid var(--card-border);
  padding: 0.6rem;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.nav-btn:hover {
  background: var(--accent-blue);
  border-color: var(--accent-blue);
}

.hidden {
  display: none !important;
}

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