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

:root,
[data-theme="light"] {
  --bg: #f5f5f7;
  --bg-card: #ffffff;
  --bg-dropdown: #ffffff;
  --bg-hover: #f0f0f2;
  --bg-group: #f8f8fa;
  --text: #1d1d1f;
  --text-secondary: #86868b;
  --border: #d2d2d7;
  --accent: #0071e3;
  --accent-hover: #0077ed;
  --shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);
  --radius: 16px;
  --radius-sm: 10px;
  --transition: 0.2s ease;
  --flag-outline: inset 0 0 0 1px rgba(0, 0, 0, 0.1);
  --flag-glow: 0 0 15px rgba(255, 255, 255, 0.8);
  --card-glow: 0 0 20px rgba(255, 255, 255, 0.6);
  --danger: #ff3b30;
  --danger-bg: rgba(255, 59, 48, 0.08);
  --accent-glow: 0 0 15px rgba(41, 151, 255, 0.2);
  --accent-bg: rgba(0, 113, 227, 0.06);
  --btn-primary-text: #fff;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0a0a0a;
    --bg-card: #1c1c1e;
    --bg-dropdown: #1c1c1e;
    --bg-hover: #2c2c2e;
    --bg-group: #161618;
    --text: #f5f5f7;
    --text-secondary: #86868b;
    --border: #38383a;
    --accent: #2997ff;
    --accent-hover: #40a0ff;
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.7);
    --flag-outline: inset 0 0 0 1.5px rgba(255, 255, 255, 0.4);
    --flag-glow: 0 0 25px rgba(255, 255, 255, 0.25);
    --card-glow: 0 0 35px rgba(255, 255, 255, 0.12);
    --danger: #ff453a;
    --danger-bg: rgba(255, 69, 58, 0.15);
    --accent-glow: 0 0 15px rgba(41, 151, 255, 0.4);
    --accent-bg: rgba(41, 151, 255, 0.15);
    --btn-primary-text: #fff;
  }
}

[data-theme="dark"] {
  --bg: #0a0a0a;
  --bg-card: #1c1c1e;
  --bg-dropdown: #1c1c1e;
  --bg-hover: #2c2c2e;
  --bg-group: #161618;
  --text: #f5f5f7;
  --text-secondary: #86868b;
  --border: #38383a;
  --accent: #2997ff;
  --accent-hover: #40a0ff;
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.7);
  --flag-outline: inset 0 0 0 1.5px rgba(255, 255, 255, 0.4);
  --flag-glow: 0 0 25px rgba(255, 255, 255, 0.25);
  --card-glow: 0 0 35px rgba(255, 255, 255, 0.12);
  --danger: #ff453a;
  --danger-bg: rgba(255, 69, 58, 0.15);
  --accent-glow: 0 0 15px rgba(41, 151, 255, 0.4);
  --accent-bg: rgba(41, 151, 255, 0.15);
  --btn-primary-text: #fff;
}

html {
  font-family:
    -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto,
    sans-serif;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow-y: scroll;
}

body {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 40px 20px 60px;
  overflow-y: scroll !important; /* Force scrollbar reservation */
}

/* Header */
.header {
  width: 100%;
  max-width: 1200px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 32px; /* Reduced from 48px */
}

.header h1 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  flex-shrink: 0;
}

.slot-counter {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-left: 8px;
}

.header-actions {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 2.75rem; /* ~44px */
  padding: 0 1.25rem;
  border: none;
  border-radius: 980px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
  line-height: 1;
}

@media (min-width: 601px) {
  .header-actions {
    flex-wrap: nowrap;
  }
}


.btn svg {
  width: 1.1rem;
  height: 1.1rem;
  flex-shrink: 0;
}

.btn-primary {
  background: var(--accent);
  color: var(--btn-primary-text);
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: scale(1.03);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--bg-hover);
}

.btn-icon {
  width: 2.75rem;
  height: 2.75rem;
  padding: 0;
  border-radius: 50%;
}

.btn.hidden {
  display: none;
}

.btn-remove {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.8rem;
  padding: 6px 14px;
  border-radius: 980px;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

.btn-remove:hover {
  border-color: var(--danger);
  color: var(--danger);
  background: var(--danger-bg);
}

/* Language selector */
.lang-select {
  position: relative;
}

.lang-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 2.75rem;
  padding: 0 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 980px;
  color: var(--text);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
}

.lang-btn:hover {
  background: var(--bg-hover);
}

.lang-btn svg {
  width: 1.1rem;
  height: 1.1rem;
  opacity: 0.7;
}

.lang-dropdown {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  min-width: 180px;
  max-height: 60vh;
  background: var(--bg-dropdown);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  z-index: 1000;
  overflow-y: auto;
  display: none;
}

@media (max-width: 600px) {
  .lang-name {
    display: none;
  }

  .lang-btn {
    width: 2.75rem;
    padding: 0;
    justify-content: center;
    border-radius: 50%;
  }

  .lang-dropdown {
    right: 0;
    left: auto;
    min-width: 160px;
  }
}

.lang-dropdown.open {
  display: block;
  animation: fadeIn 0.15s ease;
}

/* Button state when dropdown is open */
.lang-select:has(.lang-dropdown.open) .lang-btn,
.lang-btn.active {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--bg-hover);
  box-shadow: var(--accent-glow);
}

.lang-select:has(.lang-dropdown.open) .lang-btn svg {
  opacity: 1;
  transform: rotate(180deg);
}

.lang-btn svg {
  width: 1.1rem;
  height: 1.1rem;
  opacity: 0.7;
  transition: transform var(--transition);
}
.lang-option {
  display: block;
  width: 100%;
  padding: 10px 16px;
  border: none;
  background: none;
  color: var(--text);
  font-size: 0.875rem;
  text-align: left;
  cursor: pointer;
  transition: background var(--transition);
}

.lang-option:hover {
  background: var(--bg-hover);
}

.lang-option.active {
  color: var(--accent);
  font-weight: 600;
}

/* Main App Container */
#app {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: 600px; /* Reduced from 800px to avoid large empty space at the bottom */
}

/* Flags grid */
.flags-grid {
  width: 100%;
  max-width: 1200px;
  display: grid;
  gap: 24px;
  grid-template-columns: repeat(2, 1fr);
}

.flags-grid[data-randomizing] .flag-card {
  animation: none !important;
}

.flags-grid.cols-3 {
  grid-template-columns: repeat(3, 1fr);
}

.flags-grid.cols-4 {
  grid-template-columns: repeat(4, 1fr);
}

/* Flag card */
.flag-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: visible;
  transition: box-shadow var(--transition);
  animation: cardIn 0.3s ease;
  min-height: 300px; /* Reduced to make boxes shorter on desktop */
  display: flex;
  flex-direction: column;
}

@keyframes cardIn {
  from {
    opacity: 0;
    transform: scale(0.98) translateY(4px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

.flag-card:hover {
  box-shadow: var(--shadow-lg), var(--card-glow);
}

.flag-image-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 3 / 2;
  background: var(--bg-group);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border-radius: var(--radius) var(--radius) 0 0;
}

.flag-image-wrap::after {
  content: "";
  position: absolute;
  inset: 0;
  box-shadow: var(--flag-outline);
  pointer-events: none;
  border-radius: inherit;
  transition: box-shadow 0.3s ease;
}

.flag-card:hover .flag-image-wrap::after {
  box-shadow: var(--flag-outline), var(--flag-glow);
}

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

.flag-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.flag-placeholder svg {
  width: 48px;
  height: 48px;
  opacity: 0.3;
}

.card-body {
  padding: 12px 16px; /* Reduced from 16px */
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 16px 10px; /* Reduced bottom padding from 12px */
  position: relative;
}

/* Info button */
.btn-info {
  width: 32px;
  height: 32px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: none;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition);
}

.btn-info:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-bg);
}

/* Info popup */
.info-popup {
  position: absolute;
  bottom: calc(100% + 8px);
  left: 16px;
  width: 280px;
  background: var(--bg-dropdown);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  z-index: 60;
  overflow: hidden;
  animation: fadeIn 0.15s ease;
}

.info-popup-header {
  padding: 12px 14px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.info-popup-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text);
}

.info-popup-close {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: none;
  color: var(--text-secondary);
  font-size: 1.2rem;
  cursor: pointer;
  border-radius: 50%;
  transition: all var(--transition);
}

.info-popup-close:hover {
  background: var(--bg-hover);
  color: var(--text);
}

.info-popup-body {
  padding: 10px 14px;
}

.info-popup-fact {
  font-size: 0.8rem;
  line-height: 1.5;
  color: var(--text);
  margin-bottom: 10px;
}

.info-popup-stats {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 6px;
}

.info-stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.info-stat-label {
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
}

.info-stat-value {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text);
}

.info-popup-link {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 14px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
  border-top: 1px solid var(--border);
  transition: background var(--transition);
}

.info-popup-link:hover {
  background: var(--bg-hover);
}

/* Country selector */
.country-selector {
  position: relative;
}

.selector-trigger {
  width: 100%;
  height: 44px; /* Fixed height for trigger */
  padding: 10px 14px;
  background: var(--bg-group);
  border: 1.5px solid transparent;
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 0.9rem;
  text-align: left;
  cursor: pointer;
  transition: all var(--transition);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  white-space: nowrap;
}

.selector-trigger:hover,
.selector-trigger:focus {
  border-color: var(--accent);
}

.selector-trigger .selected-name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.selector-trigger .arrow {
  font-size: 0.7rem;
  opacity: 0.5;
  transition: transform var(--transition);
}

.selector-trigger.open .arrow {
  transform: rotate(180deg);
}

.selector-dropdown {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  right: 0;
  max-height: 340px;
  background: var(--bg-dropdown);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  z-index: 50;
  display: none;
  flex-direction: column;
  overflow: hidden;
}

.selector-dropdown.open {
  display: flex;
  animation: fadeIn 0.15s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.selector-search {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: var(--bg-dropdown);
}

.selector-search input {
  width: 100%;
  padding: 8px 12px;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font-size: 0.85rem;
  outline: none;
  transition: border-color var(--transition);
}

.selector-search input:focus {
  border-color: var(--accent);
}

.selector-list {
  overflow-y: auto;
  overscroll-behavior: contain;
  flex: 1;
  min-height: 0;
}

.selector-group-label {
  padding: 8px 14px 4px;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  background: var(--bg-group);
  position: sticky;
  top: 0;
}

.selector-item {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 8px 14px;
  border: none;
  background: none;
  color: var(--text);
  font-size: 0.85rem;
  text-align: left;
  cursor: pointer;
  transition: background var(--transition);
}

.selector-item:hover,
.selector-item.highlighted {
  background: var(--bg-hover);
}

.selector-item.selected {
  color: var(--accent);
  font-weight: 600;
}

.selector-item img {
  width: 24px;
  height: 16px;
  object-fit: cover;
  border-radius: 2px;
  flex-shrink: 0;
}

.selector-empty {
  padding: 20px;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 900px) {
  .flags-grid.cols-3,
  .flags-grid.cols-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  body {
    padding: 24px 12px 40px;
  }

  .header {
    flex-direction: column;
    gap: 16px;
    margin-bottom: 32px;
  }

  .header h1 {
    font-size: 1.6rem;
  }

  .header-actions {
    justify-content: center;
    width: 100%;
    gap: 6px;
    flex-wrap: nowrap;
  }

  .btn {
    padding: 0 0.75rem;
    font-size: 0.8rem;
    height: 2.5rem;
  }

  .btn-icon,
  .lang-btn {
    width: 2.5rem;
    height: 2.5rem;
    padding: 0;
    flex-shrink: 0;
  }

  /* On small phones, hide text to save space */
  @media (max-width: 400px) {
    .btn-text {
      display: none;
    }
    .btn {
      width: 2.5rem;
      padding: 0;
    }
  }

  .flags-grid,
  .flags-grid.cols-3,
  .flags-grid.cols-4 {
    grid-template-columns: 1fr;
  }

  .btn {
    padding: 8px 16px;
    font-size: 0.8rem;
  }
}

/* Scrollbar */
.selector-list::-webkit-scrollbar {
  width: 6px;
}

.selector-list::-webkit-scrollbar-track {
  background: transparent;
}

.selector-list::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}

.selector-list::-webkit-scrollbar-thumb:hover {
  background: var(--text-secondary);
}