/* ============================================
   რატომ მე? — Styles
   Aesthetic: Clean, warm, Georgian-modern
   Like a quality newspaper puzzle
   ============================================ */

:root {
  /* Background & Surface */
  --color-bg: #FAF7F2;
  --color-surface: #FFFFFF;
  --color-surface-hover: #F0EDE8;
  --color-border: #E0DBD4;

  /* Text */
  --color-text: #2C2520;
  --color-text-muted: #8A7F76;

  /* Category difficulty colors */
  --color-cat-1: #6AAF6A; /* Easy — green */
  --color-cat-1-bg: #D4EDDA;
  --color-cat-1-text: #1B4332;
  --color-cat-2: #D4A843; /* Medium — yellow */
  --color-cat-2-bg: #FFF3CD;
  --color-cat-2-text: #664D03;
  --color-cat-3: #D4783A; /* Hard — orange */
  --color-cat-3-bg: #FFE0CC;
  --color-cat-3-text: #6B2F0A;
  --color-cat-4: #C0504D; /* Tricky — red */
  --color-cat-4-bg: #F8D7DA;
  --color-cat-4-text: #58151C;

  /* UI accent */
  --color-primary: #5B4A3F;
  --color-primary-hover: #47392F;
  --color-selected: #5B4A3F;
  --color-selected-text: #FFFFFF;

  /* Spacing */
  --gap: 8px;
  --radius: 10px;
  --radius-sm: 6px;

  /* Transitions */
  --transition: 0.2s ease;
}

/* ---- Reset & Base ---- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Noto Sans Georgian', sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  min-height: 100dvh;
  display: flex;
  justify-content: center;
  -webkit-tap-highlight-color: transparent;
  -webkit-user-select: none;
  user-select: none;
}

/* ---- App Container ---- */
.app {
  width: 100%;
  max-width: 480px;
  padding: 12px 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

/* ---- Header ---- */
.header {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-border);
}

.header-title {
  text-align: center;
}

.header-title h1 {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.header-meta {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.header-btn {
  background: none;
  border: none;
  color: var(--color-text);
  cursor: pointer;
  padding: 8px;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.header-btn:hover {
  background: var(--color-surface-hover);
}

/* ---- Found Groups ---- */
.found-groups {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: var(--gap);
}

.found-group {
  width: 100%;
  padding: 14px 12px;
  border-radius: var(--radius);
  text-align: center;
  animation: groupReveal 0.5s ease forwards;
}

.found-group.cat-1 { background: var(--color-cat-1-bg); color: var(--color-cat-1-text); }
.found-group.cat-2 { background: var(--color-cat-2-bg); color: var(--color-cat-2-text); }
.found-group.cat-3 { background: var(--color-cat-3-bg); color: var(--color-cat-3-text); }
.found-group.cat-4 { background: var(--color-cat-4-bg); color: var(--color-cat-4-text); }

.found-group-name {
  font-weight: 700;
  font-size: 0.85rem;
  margin-bottom: 4px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.found-group-words {
  font-size: 0.8rem;
  font-weight: 400;
}

@keyframes groupReveal {
  from { opacity: 0; transform: translateY(10px) scale(0.97); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

/* ---- 4x4 Grid ---- */
.grid {
  width: 100%;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--gap);
}

.tile {
  aspect-ratio: 1.4 / 1;
  min-height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 6px 4px;
  background: var(--color-surface);
  border: 2px solid var(--color-border);
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 600;
  line-height: 1.2;
  word-break: break-word;
  transition:
    background var(--transition),
    border-color var(--transition),
    transform 0.15s ease,
    box-shadow var(--transition);
}

.tile:hover {
  border-color: var(--color-primary);
  box-shadow: 0 2px 8px rgba(91, 74, 63, 0.1);
}

.tile:active {
  transform: scale(0.96);
}

.tile.selected {
  background: var(--color-selected);
  border-color: var(--color-selected);
  color: var(--color-selected-text);
  transform: scale(1.03);
  box-shadow: 0 4px 12px rgba(91, 74, 63, 0.25);
}

.tile.disabled {
  pointer-events: none;
  opacity: 0.4;
}

/* Shake animation for wrong guess */
.tile.shake {
  animation: shake 0.4s ease;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-6px); }
  40% { transform: translateX(6px); }
  60% { transform: translateX(-4px); }
  80% { transform: translateX(4px); }
}

/* Pop animation for correct group before reveal */
.tile.pop {
  animation: pop 0.3s ease;
}

@keyframes pop {
  0% { transform: scale(1); }
  50% { transform: scale(1.1); }
  100% { transform: scale(1); }
}

/* ---- Mistakes ---- */
.mistakes {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.mistake-dots {
  display: flex;
  gap: 6px;
}

.mistake-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-cat-4);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.mistake-dot.used {
  opacity: 0.15;
  transform: scale(0.7);
}

/* ---- Action Buttons ---- */
.actions {
  width: 100%;
  display: flex;
  gap: 10px;
  justify-content: center;
}

.btn {
  padding: 12px 24px;
  border: none;
  border-radius: 999px;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), opacity var(--transition), transform 0.1s ease;
  min-height: 44px;
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

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

.btn-primary:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.btn-primary:disabled:hover {
  background: var(--color-primary);
}

.btn-secondary {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-border);
}

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

/* ---- Toast ---- */
.toast {
  position: fixed;
  top: 50px;
  left: 50%;
  transform: translateX(-50%) translateY(-20px);
  background: var(--color-text);
  color: var(--color-bg);
  padding: 10px 24px;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s ease;
  z-index: 1000;
  white-space: nowrap;
}

.toast.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ---- Modals ---- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(44, 37, 32, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
  padding: 16px;
}

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

.modal {
  background: var(--color-bg);
  border-radius: 16px;
  padding: 28px 24px;
  max-width: 400px;
  width: 100%;
  position: relative;
  transform: translateY(20px) scale(0.97);
  transition: transform 0.25s ease;
  max-height: 90dvh;
  overflow-y: auto;
}

.modal-overlay.open .modal {
  transform: translateY(0) scale(1);
}

.modal h2 {
  text-align: center;
  margin-bottom: 20px;
  font-size: 1.3rem;
}

.modal h3 {
  text-align: center;
  margin: 16px 0 10px;
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

.modal-close {
  position: absolute;
  top: 12px;
  right: 16px;
  background: none;
  border: none;
  font-size: 1.6rem;
  cursor: pointer;
  color: var(--color-text-muted);
  padding: 4px;
  line-height: 1;
}

.modal-action {
  display: block;
  width: 100%;
  margin-top: 20px;
}

/* ---- How to Play ---- */
.how-steps {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.how-step {
  display: flex;
  align-items: center;
  gap: 14px;
}

.how-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
  width: 40px;
  text-align: center;
}

.how-step p {
  font-size: 0.9rem;
  line-height: 1.5;
}

.cat-dot {
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  vertical-align: middle;
  margin: 0 2px;
}

.cat-dot.cat-1 { background: var(--color-cat-1); }
.cat-dot.cat-2 { background: var(--color-cat-2); }
.cat-dot.cat-3 { background: var(--color-cat-3); }
.cat-dot.cat-4 { background: var(--color-cat-4); }

/* ---- Results ---- */
.results-grid {
  text-align: center;
  font-size: 1.5rem;
  line-height: 1.8;
  margin-bottom: 16px;
  letter-spacing: 4px;
  white-space: pre-line;
}

.results-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  text-align: center;
  margin-bottom: 12px;
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
}

.stat-label {
  font-size: 0.65rem;
  color: var(--color-text-muted);
  line-height: 1.3;
}

.results-countdown {
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: 8px;
}

.results-countdown .countdown-time {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-text);
  display: block;
  margin-top: 4px;
}

/* ---- Stats Distribution ---- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  text-align: center;
  margin-bottom: 20px;
}

.stats-distribution {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.dist-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.dist-label {
  flex-shrink: 0;
  width: 20px;
  font-size: 0.8rem;
  text-align: right;
  color: var(--color-text-muted);
}

.dist-bar {
  height: 24px;
  border-radius: 4px;
  background: var(--color-border);
  min-width: 24px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding-right: 8px;
  font-size: 0.7rem;
  font-weight: 600;
  color: #fff;
  transition: width 0.5s ease;
}

.dist-bar.highlight {
  background: var(--color-primary);
}

/* ---- Loading State ---- */
.tile.loading {
  background: var(--color-surface-hover);
  border-color: var(--color-border);
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 0.6; }
  50% { opacity: 1; }
}

/* ---- Responsive ---- */
@media (max-width: 360px) {
  .tile {
    font-size: 0.72rem;
    min-height: 46px;
    padding: 4px 2px;
  }

  .header-title h1 {
    font-size: 1.3rem;
  }

  .btn {
    padding: 10px 16px;
    font-size: 0.82rem;
  }
}

@media (min-width: 481px) {
  .app {
    padding: 20px 16px;
  }

  .tile {
    font-size: 0.9rem;
    min-height: 60px;
  }
}