/* ==========================================
   DESIGN SYSTEM
   ========================================== */

/* Colors */
:root {
  --color-primary: #61008f;
  --color-primary-hover: #555;
  --color-bg-main: #fdfbfb;
  --color-bg-gradient: radial-gradient(circle at top, #fdfbfb 0%, #ebedee 60%, #dfe4ea 100%);
  --color-surface: #ffffff;
  --color-border: #ddd;
  --color-text: #333;
  --color-text-muted: #666;
  --color-disabled: #ccc;

  /* Difficulty colors */
  --color-yellow: #ffeaa7;
  --color-green: #b8e994;
  --color-blue: #74b9ff;
  --color-purple: #d1a6f7;

  /* Feedback colors */
  --color-correct: #4caf50;
  --color-incorrect: #f44336;
  --color-info: #004cff;

  /* Typography */
  --font-primary: "Arial", sans-serif;
  --font-h1: "Cookie", cursive;
  --font-size-base: 16px;
  --font-size-small: 14px;
  --font-size-large: 18px;
  --font-size-larger: 20px;
  --font-size-xlarge: 24px;
  --font-size-heading: 120px;

  /* Spacing */
  --spacing-xs: 5px;
  --spacing-sm: 10px;
  --spacing-md: 15px;
  --spacing-lg: 20px;
  --spacing-xl: 24px;

  /* Border radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;

  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 6px 14px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 12px 30px rgba(0, 0, 0, 0.08);
}

/* ==========================================
   BASE STYLES
   ========================================== */

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

html,
body {
  width: 100%;
  max-width: 100%;
  overflow-x: hidden; /* prevent sideways scroll */
  overflow-y: auto;   /* allow vertical scroll */
}

body {
  background: var(--color-bg-gradient);
  display: flex;
  flex-direction: column;   /* add this */
  align-items: center;      /* center the main column */
  justify-content: flex-start;
  min-height: 100vh;
  padding: 0;
}

.header-row {
  width: 100%;
  max-width: 510px;
  margin: 0 auto;
  padding-inline: var(--spacing-lg);
  box-sizing: border-box;
  display: flex;
  justify-content: space-between;
  align-items: baseline;   /* key line: align by text baseline */
}


h1 {
  font-family: var(--font-h1);
  margin-bottom: 0;
  color: var(--color-text);
  font-size: 5em;
  text-align: left;
} 

.directions {
  font-family: var(--font-primary);
  color: var(--color-text-muted);
  font-size: var(--font-size-small);
  max-width: 510px;
  margin: 0 auto var(--spacing-xs);
  padding-inline: var(--spacing-lg);
  box-sizing: border-box;
  text-align: center;
}

/* Larger screens: make the directions more prominent */
@media (min-width: 768px) {
  .directions {
    font-size: var(--font-size-large);
    margin: 0 auto var(--spacing-sm);
  }
}

.solve-counter {
  display: inline-flex;
  flex-direction: row;
  align-items: baseline;   /* share baseline with the number */
  justify-content: flex-end;
  gap: 4px;
  line-height: 1;
}

.solve-counter__icon {
  font-size: 32px;
}

.solve-counter__value {
  font-family: var(--font-primary);
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text-muted);
}
.ai-banner {
  width: 100%;
  height: 60px;
  padding: 0 16px;
  position: relative;
  z-index: 0;
  display: flex;
  align-items: center;      /* vertical centering */
  justify-content: center;  /* horizontal centering */
  overflow: hidden;
  border: none;
  background: #0b1120;        /* dark pill-like background */
  color: #f9fafb;
  font-family: var(--font-primary);
  font-size: 0.9rem;
  font-weight: 500;
  text-align: center;
}

/* BASE SNAPSHOT: AI banner styles (keep this as the revert point) --------------------------------
.ai-banner {
  width: 100%;
  height: 60px;
  padding: 0 16px;
  position: relative;
  z-index: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border: none;
  background: #0b1120;
  color: #f9fafb;
  font-family: var(--font-primary);
  font-size: 0.9rem;
  font-weight: 500;
  text-align: center;
}

.ai-banner::before {
  content: "";
  position: absolute;
  inset: -40%;
  z-index: 0;
  background:
    radial-gradient(30% 20% at 10% 30%, rgba(168,85,247,0.28), transparent 35%),
    radial-gradient(25% 18% at 60% 50%, rgba(4,242,255,0.22), transparent 40%),
    radial-gradient(35% 25% at 80% 30%, rgba(168,85,247,0.24), transparent 45%);
  filter: blur(26px);
  opacity: 0.95;
}

.ai-banner::after {
  content: "";
  position: absolute;
  inset: -35%;
  z-index: 0;
  background: linear-gradient(120deg, #a855f7, #04f2ff);
  background-size: 250% 250%;
  filter: blur(18px);
  opacity: 0.66;
}
-----------------------------------------------------------------------------------------------------

/* Restored base: cloud blobs + moving foggy gradient */
.ai-banner::before {
  /* large, soft cloud blobs */
  content: "";
  position: absolute;
  inset: -40%;
  z-index: 0;
  background:
    radial-gradient(30% 20% at 10% 30%, rgba(168,85,247,0.28), transparent 35%),
    radial-gradient(25% 18% at 60% 50%, rgba(4,242,255,0.22), transparent 40%),
    radial-gradient(35% 25% at 80% 30%, rgba(168,85,247,0.24), transparent 45%);
  filter: blur(26px);
  opacity: 0.95;
  animation: cloudMove 22s linear infinite;
}

.ai-banner::after {
  /* moving foggy gradient layer (original purple -> cyan colors) */
  content: "";
  position: absolute;
  inset: -35%;
  z-index: 0;
  background: linear-gradient(120deg, #a855f7, #04f2ff);
  background-size: 250% 250%;
  filter: blur(18px);
  opacity: 0.66;
  animation: aiSlide 10s ease-in-out infinite;
}

/* Ensure the banner's text/content sits above the cloud layers */
.ai-banner__content {
  position: relative;
  z-index: 3;
  display: inline-block;
}

@media (max-width: 600px) {
  .ai-banner::before, .ai-banner::after {
    inset: -20%;
    filter: blur(18px);
    opacity: 0.8;
  }
  .ai-banner::before { filter: blur(22px); animation-duration: 28s; }
  .ai-banner::after { filter: blur(10px); animation-duration: 14s; }
}

/* Moving gradient animation (original behavior) */
@keyframes aiSlide {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

@keyframes cloudMove {
  0% {
    background-position: 0% 0%;
    transform: translateX(0) translateY(0);
  }
  50% {
    background-position: 50% 50%;
    transform: translateX(-6%) translateY(2%);
  }
  100% {
    background-position: 100% 0%;
    transform: translateX(0) translateY(0);
  }
}

/* legacy keyframe name for compatibility (kept but inert) */
@keyframes cloudFloat {
  0% { transform: translateX(0) translateY(0) scale(1); opacity:0.7; }
  25% { transform: translateX(4%) translateY(-1%) scale(1.02); }
  50% { transform: translateX(0) translateY(1%) scale(0.99); }
  75% { transform: translateX(-4%) translateY(-0.5%) scale(1.01); }
  100% { transform: translateX(0) translateY(0) scale(1); opacity:0.7; }
}

/* Mobile and responsiveness tweaks */
@media (max-width: 600px) {
  .ai-banner {
    height: 48px;
    font-size: 0.85rem;
  }
  .ai-banner::before, .ai-banner::after {
    inset: -18%;
    filter: blur(20px);
    opacity: 0.78;
  }
  .ai-banner::before { animation-duration: 40s; }
  .ai-banner::after { animation-duration: 22s; }
}

/* Respect user preference for reduced motion */
@media (prefers-reduced-motion: reduce) {
  .ai-banner::before,
  .ai-banner::after {
    animation: none !important;
    transition: none !important;
    transform: none !important;
  }
}

/* ==========================================
   GAME COMPONENTS


/* ==========================================
   GAME COMPONENTS
   ========================================== */

.solved-categories {
  margin-bottom: var(--spacing-sm);
  width: 100%;
  max-width: 510px;
  padding-inline: var(--spacing-lg);
  box-sizing: border-box;
  margin-left: auto;
  margin-right: auto;
}

.solved-category {
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
  border-radius: var(--radius-md);
  text-align: center;
  height: 120px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: translateY(-8px);
  animation: solvedIn 0.6s ease forwards;
}

.solved-category.yellow {
  background-color: var(--color-yellow);
}
.solved-category.green {
  background-color: var(--color-green);
}
.solved-category.blue {
  background-color: var(--color-blue);
}
.solved-category.purple {
  background-color: var(--color-purple);
}

@keyframes solvedIn {
  0% {
    opacity: 0;
    transform: translateY(-8px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

.category-name {
  font-family: var(--font-primary);
  font-weight: bold;
  margin-bottom: var(--spacing-xs);
  text-transform: uppercase;
  font-size: var(--font-size-small);
}

.category-words {
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
}

.game-board {
  font-family: var(--font-primary);
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--spacing-sm);
  margin: 0 auto 2em;
  justify-content: center;
  width: 100%;
  max-width: 510px;
  padding-inline: var(--spacing-lg);
  box-sizing: border-box;
}

.word-tile {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  text-transform: uppercase;

  width: 100%;
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;

  padding-inline: 6px;
  padding-block: 6px;
}
 
.word-text {
  font-family: var(--font-primary);
  font-weight: 600;

  /* base size: same for almost all tiles */
  font-size: 15px;

  /* default: keep on one line */
  white-space: nowrap;
}

/* multi-word phrases may wrap if needed */
.word-text.has-space {
  white-space: normal;
  overflow-wrap: break-word;
  text-align: center;      /* center multi-line phrases */
  display: inline-block;   /* ensure text-align works inside span */
}


@keyframes tileIn {
  0% {
    opacity: 0;
    transform: translateY(5px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (hover: hover) and (pointer: fine) {
  .word-tile:hover {
    background-color: #f0f0f0;
  }
}

.word-tile:active {
  transform: scale(0.97);
}

.word-tile.selected {
  background-color: var(--color-primary);
  border: 1px solid var(--color-surface);
  color: white;
  box-shadow: var(--shadow-md);
}

.word-tile.group-selected {
  background-color: var(--color-primary);
  color: #fff;
  box-shadow: var(--shadow-md);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.word-tile.correct-hop {
  animation: correctHop 0.25s ease-out;
}

@keyframes correctHop {
  0% {
    transform: translateY(0);
  }
  40% {
    transform: translateY(-10px);
  }
  100% {
    transform: translateY(0);
  }
}

.word-tile.correct-resolve {
  animation: correctResolve 0.5s ease-out forwards;
}

.word-tile.completed {
  opacity: 0.5;
  cursor: default;
}

@keyframes correctResolve {
  0% {
    transform: translateY(0);
    opacity: 1;
  }
  100% {
    transform: translateY(-20px);
    opacity: 0;
  }
}

.word-tile.wrong-guess {
  animation: wrongShake 0.3s ease;
}

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

.controls {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
}

button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 12px 24px;
  font-size: var(--font-size-xlarge);
  font-weight: 600;
  border-radius: var(--radius-xl);
  cursor: pointer;
  border: none;
  transition: background-color 0.2s, color 0.2s, border-color 0.2s;
}

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

#submit-btn:disabled {
  background-color: var(--color-disabled);
  cursor: not-allowed;
}

#submit-btn:not(:disabled):hover {
  background-color: var(--color-primary-hover);
}

#deselect-btn,
#shuffle-btn {
  background-color: var(--color-surface);
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

#deselect-btn:hover,
#shuffle-btn:hover {
background-color: #f0f0f0;
}

.stats {
 font-family: var(--font-primary);
  font-size: var(--font-size-large);
  color: var(--color-text-muted);
  width: 100%;
  max-width: 510px;
  margin: 0 auto 20px;  /* bottom margin: 32px */
  padding-inline: var(--spacing-lg);
  box-sizing: border-box;
  text-align: center;
}

/* ==========================================
   MESSAGE
   ========================================== */

.container {
  position: relative;
  width: 100%;
  max-width: 510px;
  margin: 10px auto 0;  /*top gap, centered */
}

.message-overlay {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  padding: 8px 16px;
  border-radius: var(--radius-xl);
  font-weight: 600;
  font-size: 14px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
  z-index: 10;
  white-space: nowrap;
  background: rgba(0, 0, 0, 0.85);
  color: #fff;
  border: 1px solid transparent;
}

.message-overlay.visible {
  opacity: 1;
}

.message-overlay.correct {
  font-family: "Arial";
  font-size: 18px;
  color: #000000;
  background: var(--color-bg-main);
  border-color: var(--color-text);
  padding: 10px 30px;
}

.message-overlay.incorrect,
.message-overlay.info {
  font-family: "Arial";
  font-size: 12px;
  color: #000000;
  background: var(--color-bg-main);
  border-color: var(--color-text);
  padding: 10px 30px;
}

/* ==========================================
   RESPONSIVE
   ========================================== */

@media (max-width: 600px) {
  .header-row {
    max-width: 320px;
  }

  h1 {
    font-size: 55px;
  }

  .solve-counter__icon {
    font-size: 24px;
  }
  .solve-counter__value {
    font-size: 14px;
  }

  .container {
    position: relative;
    width: 100%;
    max-width: 420px;
    margin: 10px auto 0;  /* top gap, centered */
    padding: 0 8px;
  }

  .game-board {
    gap: 6px;
    width: 100%;
    margin: var(--spacing-lg) auto;
  }

  .word-tile {
    width: 100%;
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-inline: 8px;
    padding-block: 6px;
  }

  /* base mobile size: same for almost all tiles */
  .word-text {
    font-size: 13px;
    line-height: 1.1;
  }

  /* phrases are allowed to wrap to 2 lines */
  .word-text.has-space {
    white-space: normal;
    overflow-wrap: break-word;
  }

  .solved-category {
    height: auto;
    min-height: 80px;
  }

  .solved-categories,
  .game-board,
  .controls,
  .stats {
    width: 100%;
    max-width: 95%;
    margin: 0 auto var(--spacing-sm);  /* center + bottom gap */
  }

  .controls {
    flex-wrap: wrap;
  }

  button {
    padding: 10px 18px;
    font-size: 14px;
  }

  .stats {
    font-size: 18px;
  }
}