:root {
  --sky: #eef7ff;
  --card: #ffffff;
  --primary: #1d6fd6;
  --primary-dark: #0d4ea3;
  --accent: #ffd166;
  --text: #1a2a3b;
  --muted: #5d6f86;
  --shadow: rgba(15, 67, 130, 0.18);
  --success: #7bcf9c;
  --board-bg: #eaf5ff;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  font-family: Arial, Helvetica, sans-serif;
  background: linear-gradient(180deg, #dff4ff 0%, #f9fcff 100%);
  color: var(--text);
}

body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 16px;
}

.screen {
  width: 100%;
  display: flex;
  justify-content: center;
  position: relative;
}

.panel {
  width: min(100%, 420px);
  background: rgba(255, 255, 255, 0.92);
  border: 3px solid rgba(29, 111, 214, 0.15);
  border-radius: 28px;
  box-shadow: 0 18px 40px var(--shadow);
  padding: 28px 20px 22px;
  text-align: center;
  display: none;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.panel.active {
  display: block;
  opacity: 1;
  transform: translateY(0);
}

.eyebrow {
  margin: 0 0 10px;
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--primary-dark);
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.1;
  letter-spacing: -0.04em;
  color: var(--primary-dark);
}

h1,
h2 {
  font-size: clamp(2rem, 7vw, 3.2rem);
}

.tagline,
.selected-age,
.category-message {
  margin: 14px 0 24px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--muted);
}

#start-button,
.age-button,
.category-button,
.secondary-button,
.primary-button {
  border: none;
  border-radius: 999px;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

#start-button {
  width: 100%;
  max-width: 220px;
  background: linear-gradient(180deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  font-size: clamp(1.5rem, 4vw, 2.1rem);
  font-weight: 800;
  letter-spacing: 0.06em;
  padding: 16px 20px;
  box-shadow: 0 10px 22px rgba(29, 111, 214, 0.28);
}

#start-button:hover,
#start-button:focus-visible,
.age-button:hover,
.age-button:focus-visible,
.category-button:hover,
.category-button:focus-visible,
.secondary-button:hover,
.secondary-button:focus-visible,
.primary-button:hover,
.primary-button:focus-visible {
  transform: translateY(-2px);
}

#start-button:active,
.age-button:active,
.category-button:active,
.secondary-button:active,
.primary-button:active {
  transform: translateY(0);
}

.age-list,
.category-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 22px 0 18px;
}

.age-button,
.category-button {
  width: 100%;
  background: linear-gradient(180deg, #fff5d9 0%, #ffe6a3 100%);
  color: var(--text);
  font-size: 1.05rem;
  font-weight: 700;
  padding: 16px 18px;
  box-shadow: 0 8px 18px rgba(255, 182, 52, 0.22);
}

.category-button {
  font-size: 1.1rem;
}

.category-message {
  min-height: 1.5em;
  margin-top: 0;
  margin-bottom: 10px;
  color: #b85c0d;
}

.secondary-button,
.primary-button {
  background: #eaf3ff;
  color: var(--primary-dark);
  font-size: 1rem;
  font-weight: 700;
  padding: 12px 20px;
  box-shadow: 0 8px 18px rgba(29, 111, 214, 0.12);
}

.primary-button {
  background: linear-gradient(180deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
}

.version {
  margin: 18px 0 0;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--muted);
}

.game-layout {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-top: 20px;
}

.word-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 6px;
  background: var(--board-bg);
  border-radius: 18px;
  padding: 12px;
  border: 2px solid rgba(29, 111, 214, 0.12);
}

.cell {
  aspect-ratio: 1 / 1;
  background: #fff;
  border: 1px solid #d7e8ff;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: clamp(1rem, 3vw, 1.5rem);
  font-weight: 700;
  color: var(--text);
  user-select: none;
  -webkit-user-select: none;
  touch-action: none;
}

.cell.selected {
  background: var(--accent);
  color: var(--text);
  box-shadow: inset 0 0 0 2px rgba(13, 78, 163, 0.24);
}

.cell.found {
  background: var(--success);
  color: #113f2d;
  box-shadow: inset 0 0 0 2px rgba(17, 63, 45, 0.2);
}

.word-panel {
  background: #f6fbff;
  border-radius: 18px;
  padding: 14px;
  text-align: left;
}

.word-list-title {
  margin-bottom: 12px;
  font-size: 1.2rem;
}

.word-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.word-item {
  background: #fff;
  border-radius: 999px;
  border: 1px solid #dcecff;
  padding: 8px 12px;
  font-weight: 700;
  color: var(--primary-dark);
}

.word-item.completed {
  background: #dff8e9;
  border-color: rgba(93, 170, 125, 0.5);
  text-decoration: line-through;
}

.victory-panel {
  margin-top: 20px;
  background: linear-gradient(180deg, #fffaf0 0%, #fff0c4 100%);
  border: 2px solid rgba(255, 209, 102, 0.7);
  border-radius: 18px;
  padding: 16px 14px;
}

.victory-panel h3 {
  font-size: clamp(1.8rem, 6vw, 2.5rem);
  margin-bottom: 8px;
}

.victory-panel p {
  margin: 0 0 12px;
  font-weight: 700;
  color: var(--text);
}

.victory-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.hidden {
  display: none;
}

@media (min-width: 600px) {
  .panel {
    width: min(100%, 540px);
    padding: 36px 28px 26px;
  }

  .tagline,
  .selected-age,
  .category-message {
    font-size: 1.25rem;
  }

  .game-layout {
    flex-direction: row;
    align-items: flex-start;
  }

  .word-grid {
    flex: 1 1 auto;
    min-width: 220px;
  }

  .word-panel {
    flex: 0 0 180px;
  }

  .victory-actions {
    flex-direction: row;
    justify-content: center;
  }
}