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

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
}

body {
  --bg-color: #f3f4f6;
  --grid-color: #e1e1e1;
  --panel-bg: rgb(233, 227, 255);
  --panel-bg-2: rgb(219, 209, 255);
  --text-main: #222;
  --text-soft: #555;
  --btn-dark: #111;
  --accent: rgb(181, 160, 255);

  background-color: var(--bg-color);
  background-image:
    linear-gradient(
      0deg,
      transparent 24%,
      var(--grid-color) 25%,
      var(--grid-color) 26%,
      transparent 27%,
      transparent 74%,
      var(--grid-color) 75%,
      var(--grid-color) 76%,
      transparent 77%,
      transparent
    ),
    linear-gradient(
      90deg,
      transparent 24%,
      var(--grid-color) 25%,
      var(--grid-color) 26%,
      transparent 27%,
      transparent 74%,
      var(--grid-color) 75%,
      var(--grid-color) 76%,
      transparent 77%,
      transparent
    );
  background-size: 55px 55px;
  color: var(--text-main);
}

body.dark {
  --bg-color: #2e2e35;
  --grid-color: #4b4b57;
  --panel-bg: #3a344e;
  --panel-bg-2: #463d60;
  --text-main: #f1f1f1;
  --text-soft: #d6d6d6;
  --btn-dark: #d3d3d3;
  --accent: rgb(181, 160, 255);
}

.page-shell {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 24px 90px;
}

.container {
  width: min(1100px, 95vw);
  min-height: 650px;
  background: var(--panel-bg);
  border-radius: 28px;
  box-shadow: 0 18px 45px rgba(0, 0, 0, 0.12);
  padding: 56px 50px;
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 32px;
}

h1 {
  margin: 0;
  font-size: clamp(2.8rem, 5vw, 4.5rem);
  line-height: 1.05;
  color: var(--text-main);
}

.subtitle {
  margin: 0;
  font-size: clamp(1.1rem, 2vw, 1.4rem);
  color: var(--text-soft);
}

.difficulty-buttons {
  display: grid;
  grid-template-columns: repeat(3, minmax(180px, 1fr));
  gap: 24px;
  width: 100%;
  margin-top: 8px;
}

.difficulty-buttons button {
  border: none;
  border-radius: 22px;
  min-height: 120px;
  font-size: 1.7rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, filter 0.18s ease;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.12);
}

.difficulty-buttons button:hover {
  transform: translateY(-4px);
  filter: brightness(1.02);
}

.difficulty-buttons button span {
  display: inline-block;
}

.easy {
  background: linear-gradient(135deg, #c5b3ff, #b59cff);
  color: #1f1738;
}

.medium {
  background: linear-gradient(135deg, #b79cff, #9e7cff);
  color: #1f1738;
}

.hard {
  background: linear-gradient(135deg, #9d7bff, #8360ff);
  color: white;
}

.main-actions {
  display: flex;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
}

.view-stats-btn,
.settings-btn,
.save-settings-btn,
#close-settings-btn,
#close-stats-btn,
.delete-all-btn,
.confirm-delete-btn,
.cancel-delete-btn {
  border: none;
  border-radius: 16px;
  padding: 14px 24px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.15s ease, opacity 0.15s ease, background 0.2s ease;
}

.view-stats-btn,
.settings-btn,
.save-settings-btn,
#close-settings-btn,
#close-stats-btn,
.cancel-delete-btn {
  background: var(--btn-dark);
  color: white;
}

body.dark .view-stats-btn,
body.dark .settings-btn,
body.dark .save-settings-btn,
body.dark #close-settings-btn,
body.dark #close-stats-btn,
body.dark .cancel-delete-btn {
  color: #111;
}

.delete-all-btn,
.confirm-delete-btn {
  background: #d9534f;
  color: white;
}

.view-stats-btn:hover,
.settings-btn:hover,
.save-settings-btn:hover,
#close-settings-btn:hover,
#close-stats-btn:hover,
.delete-all-btn:hover,
.confirm-delete-btn:hover,
.cancel-delete-btn:hover {
  transform: translateY(-2px);
  opacity: 0.95;
}

.settings-modal,
.stats-modal,
.confirm-modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  z-index: 1000;
}

.hidden {
  display: none !important;
}

.settings-content,
.stats-content,
.confirm-content {
  width: min(760px, 95vw);
  max-height: 85vh;
  overflow-y: auto;
  background: white;
  color: #222;
  border-radius: 24px;
  padding: 32px;
  box-shadow: 0 18px 45px rgba(0, 0, 0, 0.25);
}

.settings-content h2,
.stats-content h2,
.confirm-content h3 {
  margin-top: 0;
}

.settings-section {
  background: #f6f3ff;
  border-radius: 18px;
  padding: 18px;
  margin-bottom: 20px;
}

.setting-item {
  margin: 12px 0;
  font-size: 1rem;
}

.settings-buttons,
.stats-buttons,
.confirm-buttons {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 24px;
}

#stats-summary {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-bottom: 20px;
}

.summary-item {
  background: linear-gradient(180deg, #f8f5ff 0%, #f1ebff 100%);
  border: 1px solid rgba(181, 160, 255, 0.28);
  border-radius: 18px;
  padding: 16px 18px;
  min-height: 88px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 8px;
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.05);
  text-align: left;
}

.summary-item strong {
  font-size: 0.88rem;
  color: #5a4a86;
  font-weight: 700;
}

.summary-item span {
  font-size: 1.45rem;
  font-weight: 800;
  color: #1f1738;
  line-height: 1;
}

.summary-item-featured {
  min-height: 96px;
}

.summary-item-featured span {
  font-size: 2rem;
}

.summary-item-small {
  min-height: 70px;
  padding: 12px 14px;
}

.summary-item-small strong {
  font-size: 0.82rem;
}

.summary-item-small span {
  font-size: 1.2rem;
}

.summary-grid {
  display: grid;
  gap: 12px;
}

.summary-grid-averages {
  grid-template-columns: repeat(3, minmax(160px, 1fr));
}

.summary-grid-score {
  grid-template-columns: 1.3fr 1fr;
}

.summary-grid-highlights {
  grid-template-columns: repeat(2, minmax(140px, 1fr));
}

.summary-group {
  background: #fbf9ff;
  border: 1px solid rgba(181, 160, 255, 0.18);
  border-radius: 20px;
  padding: 16px;
}

.summary-group-title {
  margin: 0 0 12px;
  font-size: 0.95rem;
  font-weight: 800;
  color: #5a4a86;
  text-align: left;
}

.difficulty-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 22px;
  padding: 14px;
  background: #f6f3ff;
  border-radius: 16px;
  border: 1px solid rgba(181, 160, 255, 0.2);
}

.difficulty-filter label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  background: white;
  border-radius: 12px;
  font-size: 0.95rem;
  font-weight: 600;
  color: #333;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.04);
  cursor: pointer;
}

.difficulty-filter input[type="checkbox"] {
  accent-color: var(--accent);
}

#stats-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.stat-item {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 16px;
  background: #f7f7fb;
  border: 1px solid rgba(0, 0, 0, 0.05);
  border-radius: 18px;
  padding: 16px 18px;
  box-shadow: 0 6px 14px rgba(0, 0, 0, 0.04);
}

.stat-info {
  text-align: left;
  line-height: 1.65;
  color: #2b2b2b;
  word-break: break-word;
}

.stat-info strong {
  display: inline-block;
  margin-bottom: 4px;
  font-size: 1rem;
  color: #1f1738;
}

.delete-stat-btn {
  border: none;
  background: #d9534f;
  color: white;
  border-radius: 12px;
  padding: 10px 16px;
  font-weight: 700;
  cursor: pointer;
  min-width: 84px;
  align-self: center;
  transition: transform 0.15s ease, opacity 0.15s ease;
}

.delete-stat-btn:hover {
  opacity: 0.92;
  transform: translateY(-1px);
}

.perfect-accuracy {
  color: #2ca24d;
  font-weight: 700;
}

#confirm-input {
  width: 100%;
  margin-top: 12px;
  padding: 14px 16px;
  border-radius: 14px;
  border: 1px solid #ccc;
  font-size: 1rem;
  outline: none;
}

#confirm-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(181, 160, 255, 0.18);
}

.footer {
  position: fixed;
  bottom: 18px;
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  font-size: 1rem;
  color: var(--text-soft);
}

.footer p {
  margin: 4px 0;
}

.rainbow_text_animated {
  background: linear-gradient(90deg, #8f6fff, #c09cff, #8f6fff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-size: 200% auto;
  animation: rainbowShift 4s linear infinite;
}

.filters-panel {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
  margin-bottom: 22px;
}

.filter-group {
  background: #f6f3ff;
  border: 1px solid rgba(181, 160, 255, 0.22);
  border-radius: 16px;
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
}

.filter-title {
  font-size: 0.9rem;
  font-weight: 800;
  color: #5a4a86;
  text-align: left;
}

.filter-select {
  width: 100%;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid #d7d2ea;
  background: white;
  color: #222;
  font-size: 0.95rem;
  font-weight: 600;
  outline: none;
}

.filter-select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(181, 160, 255, 0.18);
}

.difficulty-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 0;
  padding: 0;
  background: transparent;
  border: 0;
}

.difficulty-filter label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  background: white;
  border-radius: 12px;
  font-size: 0.95rem;
  font-weight: 600;
  color: #333;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.04);
  cursor: pointer;
}

.difficulty-filter input[type="checkbox"],
.filter-checkbox {
  accent-color: var(--accent);
}

@keyframes rainbowShift {
  to {
    background-position: 200% center;
  }
}

@media (max-width: 900px) {
  .container {
    min-height: 560px;
    padding: 40px 24px;
  }

  .difficulty-buttons {
    grid-template-columns: 1fr;
  }

  .difficulty-buttons button {
    min-height: 90px;
  }

  #stats-summary {
    gap: 14px;
  }

  .summary-group {
    padding: 14px;
  }

  .summary-group-title {
    font-size: 0.85rem;
  }

  .summary-grid-averages,
  .summary-grid-score,
  .summary-grid-highlights {
    grid-template-columns: 1fr;
  }

  .summary-item {
    min-height: 70px;
    padding: 12px;
  }

  .summary-item span {
    font-size: 1.3rem;
  }

  .summary-item-featured span {
    font-size: 1.6rem;
  }

  .summary-item-small span {
    font-size: 1.1rem;
  }

  .stat-item {
    grid-template-columns: 1fr;
  }

  .delete-stat-btn {
    width: 100%;
  }

  .filters-panel {
    grid-template-columns: 1fr;
  }

  .footer {
    position: static;
    transform: none;
    padding-bottom: 20px;
  }

  .page-shell {
    padding-bottom: 24px;
  }
}