:root {
  /* Candy puzzle theme */
  --primary-color: #ffffff;
  --primary-2: #f7f7fb; /* card */
  --accent-color: #22b8ff; /* candy cyan */
  --accent-2: #ffa84d; /* soft orange */
  --accent-3: #7bdff2; /* sky */
  --secondary-color: #cfd2e6; /* borders */
  --text-color: #2e294e; /* deep purple */
  --muted-text: #6c6783;
  --shadow-color: 22, 25, 40; /* for neutral shadows */
  --action-color: #22b8ff;
  --danger-color: #ef476f;
  --warning-color: #ffd166;
  --info-color: #06d6a0;
  /* Logo */
  --logo-top: 20px;
  --logo-height: 2.5rem;
  --score-top: 20px;
  --score-height: 1.2rem;
}

.container {
  padding-top: calc(var(--logo-height) + 40px);
  position: relative;
  z-index: 100;
}

@media (max-width: 768px) {
  .container {
    padding-top: calc(var(--logo-height) + 24px);
  }

  .container-box {
    padding: 12px;
    margin: 8px auto;
  }

  .hud .box {
    padding: 10px;
  }

  .box {
    padding: 12px;
    margin: 10px auto;
  }

  .d-grid.gap-2 {
    row-gap: 8px;
  }

  :root {
    --logo-top: 15px;
    --logo-height: 1.5rem;
    --score-top: 15px;
    --score-height: 1rem;
  }
}

/* Section animated transitions */
.section-enter {
  opacity: 0;
  transform: translateY(20px);
}
.section-enter-active {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 300ms ease, transform 300ms ease;
}
.section-exit {
  opacity: 1;
  transform: translateY(0);
}
.section-exit-active {
  opacity: 0;
  transform: translateY(-20px);
  transition: opacity 250ms ease, transform 250ms ease;
}
@media (max-width: 576px) {
  :root {
    --logo-top: 10px;
    --logo-height: 1.2rem;
    --score-top: 10px;
    --score-height: 0.75rem;
  }
}

/* Popup Styling */
.popup {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: #ffffff;
  color: var(--text-color);
  padding: 24px 22px;
  border-radius: 16px;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.12);
  text-align: center;
  z-index: 1050;
  max-width: 90vw;
  width: 500px;
  border: 1px solid rgba(0, 0, 0, 0.06);
}

.popup h2 {
  font-size: 36px;
  font-weight: bold;
  margin-bottom: 15px;
}

#perfectPopup {
  z-index: 1051;
  transform: translate(-50%, -60%);
}
#highscorePopup {
  z-index: 1050;
  transform: translate(-50%, -10%);
}
.popup p {
  font-size: 18px;
}

.popup .close-popup {
  position: absolute;
  top: 12px;
  right: 18px;
  font-size: 24px;
  cursor: pointer;
  color: var(--text-color);
  transition: transform 0.2s ease, color 0.2s ease;
}

.popup .close-popup:hover {
  transform: scale(1.3);
  color: var(--accent-color);
}

/* Responsive popup design */
@media (max-width: 768px) {
  .popup {
    width: 90%;
    padding: 20px;
  }

  .popup h2 {
    font-size: 30px;
  }

  .popup .close-popup {
    font-size: 22px;
  }
}

/* Form Controls */
.form-control,
.form-select {
  background: #ffffff;
  color: var(--text-color) !important;
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: 12px;
}

.form-control::placeholder {
  color: #9aa0a6 !important;
}

/* Primary buttons */
.btn-primary {
  background: linear-gradient(180deg, var(--accent-color), #0aa3e0) !important;
  border: none !important;
  color: #fff !important;
  border-radius: 999px;
  box-shadow: 0 6px 0 rgba(0, 0, 0, 0.08), 0 10px 20px rgba(0, 0, 0, 0.12);
}

.btn-primary:hover,
.btn-primary:focus,
.btn-primary:active {
  transform: translateY(-1px);
  box-shadow: 0 8px 0 rgba(0, 0, 0, 0.08), 0 14px 24px rgba(0, 0, 0, 0.14);
}

/* Loading screen */
.loading-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.6);
  z-index: 9999;
  display: flex;
  justify-content: center;
  align-items: center;
  transition: opacity 0.3s ease;
}

.loading-content {
  text-align: center;
}

.loading-logo {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent-color);
  margin-bottom: 20px;
  animation: logoBounce 1.5s infinite;
  text-shadow: none;
}

.spinner {
  width: 50px;
  height: 50px;
  border: 4px solid rgba(0, 0, 0, 0.08);
  border-top: 4px solid var(--accent-color);
  border-radius: 50%;
  margin: 0 auto;
  animation: spin 1s linear infinite;
}

/* Form range styling */
.form-range::-webkit-slider-thumb {
  background: var(--accent-color);
}

.form-range::-webkit-slider-runnable-track {
  background: var(--secondary-color);
}

/* Modal styling */
.modal-content {
  border-radius: 15px;
  background: #fff !important;
  color: var(--text-color);
  border: 1px solid rgba(0, 0, 0, 0.06);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.12);
}

.form-check-input:checked {
  background-color: var(--accent-color);
  border-color: var(--accent-color);
}

.bi {
  vertical-align: middle;
}

/* Body and background */
body {
  overflow-x: hidden;
  overflow-y: auto;
}

/* Screen-reader only text utility */
.sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

#background {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  background-color: #f7f7fb;
  background-image: linear-gradient(
      rgba(247, 247, 251, 0.55),
      rgba(247, 247, 251, 0.55)
    ),
    url("assets/img/background_with_name.png");
  background-repeat: no-repeat;
  background-size: cover;
  background-position: center;
}

/* Edge blur vignette overlay */
#background::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  /* Soft vignette with radial gradient + subtle edge blur via backdrop-filter */
  background: radial-gradient(
    circle at 50% 40%,
    rgba(0, 0, 0, 0) 50%,
    rgba(0, 0, 0, 0.15) 85%,
    rgba(0, 0, 0, 0.25) 100%
  );
  backdrop-filter: blur(3px);
}

/* Parallax layers (idle until pointer moves) */
#background .bg-layer {
  position: absolute;
  will-change: transform;
  transition: transform 120ms ease-out;
  opacity: 0.6;
  filter: drop-shadow(0 6px 10px rgba(0, 0, 0, 0.06));
}
#background .bg-layer.l1,
#background .bg-layer.l2,
#background .bg-layer.l3 {
  width: 120px;
  height: 120px;
  background: none;
}

/* Themed outlined words as background stickers */
#background .bg-layer.word {
  width: auto;
  height: auto;
  padding: 0.1em 0.25em;
  font-size: clamp(28px, 8vw, 64px);
  font-weight: 900;
  letter-spacing: 2px;
  text-transform: uppercase;
  line-height: 1;
  color: #ffffff;
  -webkit-text-stroke: 2px var(--accent-color);
  text-shadow: 0 1px 0 rgba(0, 0, 0, 0.06), 0 0 0 2px var(--accent-color);
  pointer-events: none;
  user-select: none;
  opacity: 0.55;
}

/* Neon grid background */
/* Animated grid removed */

/* Game UI elements */
.high-score-bar,
.container-box,
.box {
  background: rgba(255, 255, 255, 0.82) !important;
  border: 1px solid rgba(0, 0, 0, 0.06);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.12);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.word-box,
.high-score,
.game-logo,
.modal-title,
.form-label {
  color: var(--text-color) !important;
  text-shadow: none;
}

.game-logo {
  font-weight: 700;
  position: fixed;
  top: var(--logo-top);
  font-size: var(--logo-height);
  left: 20px;
  z-index: 1000;
  color: var(--accent-color) !important;
  text-shadow: 0 2px 0 rgba(0, 0, 0, 0.08);
}

.high-score {
  top: var(--score-top);
  font-size: var(--score-height);
  font-weight: 500;
  position: fixed;
  right: 20px;
  z-index: 1000;
  background: #ffffff;
  padding: 10px 15px;
  border-radius: 8px;
  border: 1px solid rgba(0, 0, 0, 0.08);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.08);
}

.container-box {
  padding: 30px;
  border-radius: 15px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
  margin: 20px auto;
  max-width: 800px;
}

.box {
  padding: 20px;
  margin: 15px auto;
  border-radius: 10px;
}

.word-box {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: 3px;
  color: var(--text-color);
  min-height: 60px;
}

.hidden {
  display: none;
}

/* Sound control */
.sound-control {
  position: fixed;
  bottom: calc(20px + env(safe-area-inset-bottom));
  right: 20px;
  z-index: 2000;
  background: rgba(255, 255, 255, 0.85);
  border-radius: 50%;
  padding: 12px;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.12);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.volume-panel {
  position: absolute;
  bottom: 58px; /* above the button */
  right: 0;
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid rgba(0, 0, 0, 0.06);
  border-radius: 12px;
  padding: 12px;
  width: 180px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.16);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}
.volume-panel .vp-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 8px;
}
.volume-panel input[type="range"] {
  width: 100%;
}

/* Text input styling */
input[type="text"] {
  background-color: #ffffff !important;
  color: var(--text-color) !important;
  border: 1px solid rgba(0, 0, 0, 0.1);
  padding: 8px;
  border-radius: 12px;
}

input[type="text"]::placeholder {
  color: #9aa0a6;
}

input[type="text"]:focus {
  outline: none;
  border-color: var(--secondary-color);
}

/* Results table styling */
.table {
  --table-bg: #ffffff;
  --table-border: rgba(0, 0, 0, 0.06);
  --table-header-bg: #f7f7fb;
  color: var(--text-color) !important;
  background-color: var(--table-bg) !important;
  border-color: var(--table-border) !important;
}

.table th {
  background-color: var(--table-header-bg) !important;
  border-bottom: 2px solid var(--secondary-color) !important;
}

.table td {
  border-color: var(--secondary-color) !important;
  font-weight: bold;
}

.table-hover tbody tr:hover {
  background-color: #fafaff !important;
}

.table-responsive {
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 8px 24px rgba(var(--shadow-color), 0.12);
}

.table-striped tbody tr:nth-of-type(odd) {
  background-color: #fbfbff;
}

/* Candy HUD Progress */
.hud .progress.neon {
  height: 8px;
  background: #f0f1f6;
  border: 1px solid rgba(0, 0, 0, 0.06);
  border-radius: 999px;
}
.hud .progress.neon .progress-bar {
  background: linear-gradient(90deg, var(--accent-color), var(--accent-2));
  border-radius: 999px;
}

/* Streak badge */
.streak-badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 999px;
  background: #e3f7ff;
  border: 1px solid rgba(0, 123, 255, 0.06);
  color: #0879a8;
  font-weight: 700;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.06);
}

/* Word tiles */
.word-box.tiles {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
  min-height: 72px;
}
.word-box.tiles .tile {
  min-width: clamp(36px, 10vw, 52px);
  min-height: clamp(44px, 12vw, 60px);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(180deg, #f0f9ff, #cfefff);
  border: 1px solid rgba(0, 0, 0, 0.06);
  border-radius: 14px;
  box-shadow: 0 6px 0 rgba(0, 0, 0, 0.08), 0 10px 18px rgba(0, 0, 0, 0.12);
  color: #2e294e;
  font-weight: 900;
  font-size: clamp(18px, 5.2vw, 24px);
  letter-spacing: 1px;
  text-transform: uppercase;
}

/* Hint area styling */
#hintArea {
  color: var(--muted-text);
}

/* Compact hint style */
#hintArea {
  font-size: 0.9rem;
  margin-top: 6px;
  opacity: 0.95;
}
@media (max-width: 576px) {
  #hintArea {
    font-size: 0.85rem;
    margin-top: 4px;
  }
}

/* Mobile optimizations */
@media (max-width: 768px) {
  /* Make action buttons full-width on mobile with tighter spacing */
  #gameSection .d-grid.gap-2.d-md-flex {
    display: grid !important;
    grid-template-columns: 1fr;
    gap: 10px !important;
  }
  #gameSection .d-grid.gap-2.d-md-flex .btn {
    width: 100%;
  }
  .game-logo {
    font-size: 1.2rem;
    top: 15px;
    left: 15px;
  }

  .high-score {
    font-size: 0.9rem;
    top: 15px;
    right: 15px;
    padding: 8px 12px;
  }

  .loading-logo {
    font-size: 2rem;
  }

  .spinner {
    width: 40px;
    height: 40px;
  }

  .table td,
  .table th {
    padding: 0.75rem;
    font-size: 0.9rem;
  }

  .table-responsive {
    margin: 0 -15px;
    width: calc(100% + 30px);
  }

  .popup-content {
    font-size: 2rem;
    padding: 1.5rem 3rem;
  }
}

@media (max-width: 576px) {
  /* Hide non-essential helper text on mobile to reduce clutter, but KEEP the in-game hint area visible */
  #gameSection #inputHelp,
  #gameSection #submitHelp,
  #gameSection #hintHelp,
  #gameSection #skipHelp,
  #startSection .form-text,
  #startSection #startButtonHelp {
    display: none !important;
  }

  .game-logo {
    font-size: 1rem;
    top: 10px;
    left: 10px;
  }

  .high-score {
    font-size: 0.8rem;
    top: 10px;
    right: 10px;
    padding: 6px 10px;
  }

  .container-box {
    padding: 15px;
  }

  .word-box {
    font-size: 1.5rem;
  }
}