/* ==========================================================================
   Components Stylesheet: Navbar, Cards, Tooltips, Modals & UI Elements
   ========================================================================== */

/* Top Navigation Bar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background: var(--nav-bg, rgba(15, 17, 21, 0.88));
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  display: flex;
  align-items: center;
  transition: all var(--transition-normal);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  text-decoration: none;
}

.brand-icon {
  font-size: 1.8rem;
  filter: drop-shadow(0 0 8px rgba(255, 255, 255, 0.3));
}

.brand-text h1 {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-bright);
}

.brand-text span {
  font-size: 0.75rem;
  color: var(--text-muted);
  display: block;
}

/* Nav Links / Era Selector */
.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.05);
  padding: 4px;
  border-radius: 30px;
  border: 1px solid var(--border-color);
}

[data-theme="light"] .nav-links,
[data-theme="eyecare"] .nav-links {
  background: rgba(0, 0, 0, 0.04);
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  border: none;
  background: transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  font-family: var(--font-heading);
}

.nav-link:hover {
  color: var(--text-bright);
  background: rgba(255, 255, 255, 0.08);
}

[data-theme="light"] .nav-link:hover {
  background: rgba(0, 0, 0, 0.06);
}

[data-theme="eyecare"] .nav-link:hover {
  background: rgba(120, 95, 68, 0.12);
}

.nav-link.active[data-era="ww1"] {
  background: var(--ww1-primary);
  color: #ffffff;
  font-weight: 700;
  box-shadow: 0 0 16px var(--ww1-glow);
}

.nav-link.active[data-era="ww2"] {
  background: var(--ww2-primary);
  color: #ffffff;
  font-weight: 700;
  box-shadow: 0 0 16px var(--ww2-glow);
}

.nav-link.active[data-era="coldwar"] {
  background: var(--coldwar-primary);
  color: #ffffff;
  font-weight: 700;
  box-shadow: 0 0 16px var(--coldwar-glow);
}

.nav-link.active[data-era="glossary"] {
  background: #388bfd;
  color: #ffffff;
  font-weight: 700;
  box-shadow: 0 0 16px rgba(56, 139, 253, 0.5);
}

/* Nav Actions (Audio, Theme Switcher & Progress) */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-bright);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: 1.1rem;
}

[data-theme="light"] .btn-icon,
[data-theme="eyecare"] .btn-icon {
  background: var(--bg-card);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.btn-icon:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--border-glow);
  transform: scale(1.05);
}

[data-theme="light"] .btn-icon:hover {
  background: rgba(0, 0, 0, 0.08);
}

[data-theme="eyecare"] .btn-icon:hover {
  background: rgba(120, 95, 68, 0.18);
}

.btn-icon.active {
  border-color: var(--ww2-primary);
  color: var(--ww2-primary);
}

/* Theme Switcher in Navbar */
.theme-switcher-wrapper {
  position: relative;
}

.theme-dropdown {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  width: 210px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: 0 14px 36px rgba(0, 0, 0, 0.28);
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-8px);
  transition: all var(--transition-fast);
  z-index: 1500;
  backdrop-filter: blur(16px);
}

.theme-dropdown.open {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.theme-opt {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-main);
  font-family: var(--font-heading);
  font-size: 0.9rem;
  cursor: pointer;
  text-align: left;
  transition: all var(--transition-fast);
  width: 100%;
}

.theme-opt:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-bright);
}

[data-theme="light"] .theme-opt:hover {
  background: rgba(0, 0, 0, 0.05);
}

[data-theme="eyecare"] .theme-opt:hover {
  background: rgba(120, 95, 68, 0.12);
}

.theme-opt.active {
  background: rgba(56, 139, 253, 0.15);
  color: #388bfd;
  font-weight: 600;
  border-color: rgba(56, 139, 253, 0.3);
}

[data-theme="light"] .theme-opt.active {
  background: rgba(9, 105, 218, 0.12);
  color: #0969da;
  border-color: rgba(9, 105, 218, 0.3);
}

[data-theme="eyecare"] .theme-opt.active {
  background: rgba(135, 82, 37, 0.15);
  color: #875225;
  border-color: rgba(135, 82, 37, 0.35);
}

/* Timeline Progress Scrub Bar */
.progress-bar-container {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: rgba(255, 255, 255, 0.06);
}

.progress-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--ww1-primary), var(--ww2-primary), var(--coldwar-primary));
  transition: width 0.1s ease-out;
}

/* Cards & Grid Containers */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(10px);
}

.card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(255, 255, 255, 0.25);
  transform: translateY(-2px);
}

/* Era Specific Cards */
.theme-ww1 .card-era {
  background: var(--ww1-bg-card);
  border-color: var(--ww1-border);
}
.theme-ww1 .card-era:hover {
  border-color: var(--ww1-primary);
  box-shadow: 0 8px 24px rgba(194, 155, 114, 0.12);
}

.theme-ww2 .card-era {
  background: var(--ww2-bg-card);
  border-color: var(--ww2-border);
}
.theme-ww2 .card-era:hover {
  border-color: var(--ww2-primary);
  box-shadow: 0 8px 24px rgba(230, 57, 70, 0.15);
}

.theme-coldwar .card-era {
  background: var(--coldwar-bg-card);
  border-color: var(--coldwar-border);
}
.theme-coldwar .card-era:hover {
  border-color: var(--coldwar-primary);
  box-shadow: 0 8px 24px rgba(0, 245, 212, 0.15);
}

/* Content Subsections */
.content-block {
  margin-bottom: 48px;
}

.block-title {
  font-size: 1.5rem;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.block-title::before {
  content: '';
  display: inline-block;
  width: 5px;
  height: 1.2em;
  background: currentColor;
  border-radius: 3px;
}

/* MAIN Causes Matrix */
.main-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.main-card {
  background: var(--ww1-bg-card);
  border: 1px solid var(--ww1-border);
  border-radius: var(--radius-md);
  padding: 22px;
  position: relative;
  transition: all var(--transition-normal);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.04);
}

.main-card:hover {
  border-color: var(--ww1-primary);
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.main-letter {
  font-family: var(--font-serif);
  font-size: 3rem;
  font-weight: 900;
  color: var(--ww1-primary);
  line-height: 1;
  margin-bottom: 8px;
}

.main-term {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text-bright);
}

.main-thai {
  font-size: 0.9rem;
  color: var(--ww1-accent);
  margin-bottom: 10px;
}

.main-desc {
  font-size: 0.95rem;
  color: var(--text-main);
}

/* Spark Box */
.spark-box {
  background: linear-gradient(135deg, rgba(230, 57, 70, 0.15), rgba(30, 25, 21, 0.8));
  border: 1px solid rgba(230, 57, 70, 0.4);
  border-radius: var(--radius-md);
  padding: 28px;
  position: relative;
  margin-bottom: 36px;
  color: var(--text-main);
}

[data-theme="light"] .spark-box {
  background: linear-gradient(135deg, rgba(207, 34, 46, 0.08), rgba(255, 255, 255, 0.95));
  border-color: rgba(207, 34, 46, 0.35);
  box-shadow: 0 6px 20px rgba(207, 34, 46, 0.08);
}

[data-theme="eyecare"] .spark-box {
  background: linear-gradient(135deg, rgba(179, 38, 46, 0.08), rgba(248, 241, 230, 0.96));
  border-color: rgba(179, 38, 46, 0.3);
  box-shadow: 0 6px 20px rgba(120, 60, 40, 0.08);
}

.spark-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  color: #ff7b72;
  font-weight: 700;
  font-size: 1.25rem;
}

[data-theme="light"] .spark-header {
  color: #cf222e;
}

[data-theme="eyecare"] .spark-header {
  color: #b3262e;
}

.spark-content {
  font-size: 1.05rem;
  line-height: 1.8;
}

.spark-step {
  display: flex;
  gap: 16px;
  margin-top: 16px;
  background: rgba(0, 0, 0, 0.25);
  padding: 16px;
  border-radius: var(--radius-sm);
  border-left: 3px solid #ff7b72;
}

[data-theme="light"] .spark-step,
[data-theme="eyecare"] .spark-step {
  background: rgba(0, 0, 0, 0.04);
}

/* Alliance Systems Table / Cards */
.alliance-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.alliance-col {
  padding: 24px;
  border-radius: var(--radius-md);
  border: 1px solid;
}

.alliance-col.central {
  background: rgba(194, 155, 114, 0.08);
  border-color: rgba(194, 155, 114, 0.3);
}

.alliance-col.allied {
  background: rgba(56, 139, 253, 0.08);
  border-color: rgba(56, 139, 253, 0.3);
}

.alliance-col h4 {
  font-size: 1.25rem;
  margin-bottom: 6px;
}

.alliance-origin {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 16px;
  font-style: italic;
}

.member-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}

.member-tag {
  display: inline-block;
  padding: 4px 12px;
  background: var(--tag-bg, rgba(255, 255, 255, 0.08));
  border-radius: 16px;
  font-size: 0.9rem;
  color: var(--tag-color, var(--text-bright));
  border: 1px solid var(--border-color);
}

/* Universal Historical Glossary Tooltips */
.glossary-term {
  position: relative;
  display: inline;
  color: var(--text-bright);
  font-weight: 600;
  border-bottom: 2px dashed rgba(56, 139, 253, 0.6);
  cursor: help;
  transition: all var(--transition-fast);
}

.glossary-term:hover {
  color: #58a6ff;
  border-bottom-color: #58a6ff;
  background: rgba(56, 139, 253, 0.15);
  border-radius: 3px;
  padding: 0 4px;
}

.glossary-tooltip-box {
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  width: 300px;
  background: #1c2128;
  border: 1px solid rgba(56, 139, 253, 0.4);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.6);
  border-radius: var(--radius-sm);
  padding: 14px;
  z-index: 2000;
  opacity: 0;
  pointer-events: none;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  font-size: 0.88rem;
  color: var(--text-main);
  line-height: 1.5;
  text-align: left;
}

.glossary-tooltip-box::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border-width: 6px;
  border-style: solid;
  border-color: #1c2128 transparent transparent transparent;
}

.glossary-term:hover .glossary-tooltip-box,
.glossary-term:focus .glossary-tooltip-box {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.tooltip-title {
  font-weight: 700;
  color: #58a6ff;
  margin-bottom: 4px;
  font-size: 0.95rem;
}

.tooltip-category {
  display: inline-block;
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-muted);
  margin-bottom: 6px;
}

/* Modal Dialog */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(8px);
  z-index: 3000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.modal-card {
  background: var(--modal-bg, #161b22);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  width: 90%;
  max-width: 800px;
  max-height: 85vh;
  overflow-y: auto;
  padding: 32px;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.5);
  transform: scale(0.95);
  transition: transform var(--transition-normal);
}

.modal-overlay.open .modal-card {
  transform: scale(1);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-color);
}

.modal-close {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 4px;
  line-height: 1;
}

.modal-close:hover {
  color: var(--text-bright);
}

/* Responsive adjustments */
@media (max-width: 992px) {
  .main-grid, .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none; /* Mobile menu can be toggled */
  }
  .grid-2, .grid-3, .grid-4, .alliance-grid, .main-grid {
    grid-template-columns: 1fr;
  }
  .chapter-title {
    font-size: 1.8rem;
  }
  .chapter-section {
    padding: 50px 0;
  }
}