/* ==========================================================================
   SYNAPSE DESIGN SYSTEM & STYLESHEET
   Milk Porcelain (#FAF8F5) | Deep Carbon (#1A1A1A) | Electric Iris (#5E48E8)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:ital,opsz,wght@0,9..144,400..700;1,9..144,400..700&family=Plus+Jakarta+Sans:wght@500;600;700;800&family=JetBrains+Mono:wght@500;600&display=swap');

:root {
  --bg-canvas: #FAF8F5;
  --bg-card: #FFFFFF;
  --text-main: #1A1A1A;
  --text-muted: #6B7280;
  --border-card: #E5E0D6;
  --card-shadow: #DCD5C8;
  --accent-iris: #5E48E8;
  --accent-iris-light: #F3F0FF;
  --accent-amber: #F59E0B;
  
  /* Category Colors (Pastel Harmonic / High Contrast) */
  --cat-yellow: #F6D860;
  --cat-green: #7BC676;
  --cat-blue: #70A1FF;
  --cat-purple: #B088F9;
  
  --font-editorial: 'Fraunces', serif;
  --font-game: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

/* Dark Mode Tokens */
.dark-mode {
  --bg-canvas: #11141C;
  --bg-card: #1D2230;
  --text-main: #F4F5F7;
  --text-muted: #9CA3AF;
  --border-card: #2D3548;
  --card-shadow: #141822;
  --accent-iris: #7C6BF0;
  --accent-iris-light: #252445;
  --accent-amber: #FBBF24;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body {
  background-color: var(--bg-canvas);
  color: var(--text-main);
  font-family: var(--font-game);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color 0.3s ease, color 0.3s ease;
  overflow-x: hidden;
}

/* App Header */
.app-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: var(--bg-canvas);
  border-bottom: 1px solid var(--border-card);
  backdrop-filter: blur(12px);
  padding: 12px 20px;
}

.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-wrapper {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
}

.brand-logo-icon {
  width: 32px;
  height: 32px;
}

.brand-title {
  font-family: var(--font-editorial);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--text-main);
}

.brand-dot {
  color: var(--accent-iris);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.icon-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 10px;
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 16px;
  color: var(--text-main);
  box-shadow: 0 2px 0 var(--card-shadow);
  transition: all 0.15s ease;
}

.icon-btn:hover {
  transform: translateY(-1px);
  border-color: var(--accent-iris);
}

.icon-btn:active {
  transform: translateY(1px);
  box-shadow: 0 0 0 var(--card-shadow);
}

.streak-pill {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 14px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 5px;
  box-shadow: 0 2px 0 var(--card-shadow);
}

/* Master Layout Grid (Desktop 3-Column vs Mobile 1-Column) */
.main-viewport {
  flex: 1;
  max-width: 1320px;
  margin: 0 auto;
  width: 100%;
  padding: 16px 20px 80px 20px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 1100px) {
  .main-viewport {
    grid-template-columns: 280px 1fr 340px;
    align-items: start;
  }
}

/* Left Sidebar Info Rail */
.left-sidebar-rail {
  display: none;
}

@media (min-width: 1100px) {
  .left-sidebar-rail {
    display: flex;
    flex-direction: column;
    gap: 16px;
    position: sticky;
    top: 80px;
  }
}

.sidebar-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 16px;
  padding: 20px;
  box-shadow: 0 3px 0 var(--card-shadow);
}

.sidebar-card-title {
  font-family: var(--font-editorial);
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-main);
}

.sidebar-card-text {
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-muted);
}

.live-metrics-box {
  background: var(--accent-iris-light);
  border: 1px dashed var(--accent-iris);
  border-radius: 12px;
  padding: 14px;
  margin-top: 10px;
}

.metric-row {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  margin-bottom: 6px;
  font-weight: 600;
}

.metric-val {
  font-family: var(--font-mono);
  color: var(--accent-iris);
}

/* Central Game Column */
.game-column {
  max-width: 620px;
  margin: 0 auto;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Mode Tabs */
.mode-tabs {
  display: flex;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 12px;
  padding: 4px;
  gap: 4px;
  box-shadow: 0 2px 0 var(--card-shadow);
}

.tab-btn {
  flex: 1;
  padding: 8px 14px;
  border-radius: 8px;
  border: none;
  background: transparent;
  font-size: 13px;
  font-weight: 700;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s ease;
}

.tab-btn.tab-active {
  background: var(--accent-iris);
  color: #FFFFFF;
  box-shadow: 0 2px 4px rgba(94, 72, 232, 0.25);
}

/* Subtitle & Timer */
.game-info-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 4px;
}

.mode-badge {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.timer-badge {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  padding: 4px 10px;
  border-radius: 12px;
  color: var(--text-main);
  box-shadow: 0 1px 0 var(--card-shadow);
}

/* Solved Rows Container */
.solved-rows-container {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.solved-category-banner {
  border-radius: 12px;
  padding: 16px 14px;
  text-align: center;
  animation: slideDownFade 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
  box-shadow: 0 3px 0 rgba(0, 0, 0, 0.08);
}

.category-yellow { background-color: var(--cat-yellow); color: #2D270B; }
.category-green  { background-color: var(--cat-green);  color: #0E2914; }
.category-blue   { background-color: var(--cat-blue);   color: #0B2447; }
.category-purple { background-color: var(--cat-purple); color: #2B154D; }

.solved-cat-title {
  font-weight: 800;
  font-size: 15px;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
  text-transform: uppercase;
}

.solved-cat-words {
  font-size: 13px;
  font-weight: 600;
  opacity: 0.9;
}

/* 4x4 Active Word Grid */
.active-grid-container {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-top: 4px;
}

.synapse-word-card {
  aspect-ratio: 1 / 0.85;
  background: var(--bg-card);
  border: 2px solid var(--border-card);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6px;
  cursor: pointer;
  box-shadow: 0 4px 0 var(--card-shadow);
  transition: transform 0.12s cubic-bezier(0.2, 0.8, 0.4, 1), 
              border-color 0.12s ease, 
              background-color 0.12s ease, 
              box-shadow 0.12s ease;
  user-select: none;
}

.synapse-word-card:hover {
  transform: translateY(-2px);
  border-color: #CBD5E1;
}

.synapse-word-card:active {
  transform: translateY(2px);
  box-shadow: 0 1px 0 var(--card-shadow);
}

.card-word {
  font-size: 13px;
  font-weight: 800;
  letter-spacing: -0.2px;
  text-transform: uppercase;
  text-align: center;
  word-break: break-word;
  color: var(--text-main);
}

@media (min-width: 480px) {
  .card-word {
    font-size: 15px;
  }
}

/* Tile States */
.synapse-word-card.tile-selected {
  background-color: var(--accent-iris-light);
  border-color: var(--accent-iris);
  box-shadow: 0 4px 0 rgba(94, 72, 232, 0.4);
  transform: translateY(-1px);
}

.synapse-word-card.tile-selected .card-word {
  color: var(--accent-iris);
}

.synapse-word-card.tile-shake {
  animation: tileShake 0.5s ease-in-out;
}

.synapse-word-card.tile-solved-pop {
  animation: tilePop 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Mistakes Indicators */
.mistakes-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted);
}

.mistakes-pills {
  display: flex;
  gap: 6px;
}

.mistake-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
  transition: all 0.2s ease;
}

.mistake-dot.dot-active {
  background-color: var(--accent-amber);
  box-shadow: 0 0 6px rgba(245, 158, 11, 0.4);
}

.mistake-dot.dot-lost {
  background-color: var(--border-card);
  transform: scale(0.8);
}

/* Action Control Buttons */
.controls-bar {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 8px;
}

.action-btn {
  padding: 12px 22px;
  border-radius: 24px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-secondary {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  color: var(--text-main);
  box-shadow: 0 3px 0 var(--card-shadow);
}

.btn-secondary:hover:not(:disabled) {
  border-color: var(--text-main);
  transform: translateY(-1px);
}

.btn-secondary:active:not(:disabled) {
  transform: translateY(2px);
  box-shadow: 0 0 0 var(--card-shadow);
}

.btn-primary {
  background: var(--text-main);
  border: none;
  color: #FFFFFF;
  box-shadow: 0 3px 0 rgba(0, 0, 0, 0.2);
}

.dark-mode .btn-primary {
  background: var(--accent-iris);
}

.btn-primary:hover:not(:disabled) {
  transform: translateY(-1px);
  opacity: 0.95;
}

.btn-primary:active:not(:disabled) {
  transform: translateY(2px);
  box-shadow: 0 0 0 rgba(0, 0, 0, 0.2);
}

.action-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  box-shadow: none;
  transform: none !important;
}

/* Hint Button & Banner */
.hint-banner-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  margin-top: 6px;
}

.hint-btn {
  background: transparent;
  border: 1px dashed var(--accent-iris);
  color: var(--accent-iris);
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s ease;
}

.hint-btn:hover {
  background: var(--accent-iris-light);
}

.revealed-hint-box {
  background: #FEF3C7;
  color: #92400E;
  border: 1px solid #FCD34D;
  border-radius: 10px;
  padding: 10px 14px;
  font-size: 13px;
  text-align: center;
  width: 100%;
}

/* Right Sidebar (Desktop Sticky 300x600 Ad Rail) */
.right-sidebar-rail {
  display: none;
}

@media (min-width: 1100px) {
  .right-sidebar-rail {
    display: flex;
    flex-direction: column;
    gap: 16px;
    position: sticky;
    top: 80px;
  }
}

/* Ad Unit Containers (Hardcoded Aspect Ratios) */
.desktop-ad-card {
  min-height: 520px;
  width: 100%;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 16px;
  box-shadow: 0 3px 0 var(--card-shadow);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.sticky-bottom-ad-wrapper {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  z-index: 30;
  background: var(--bg-canvas);
  border-top: 1px solid var(--border-card);
  padding: 8px 16px;
  display: flex;
  justify-content: center;
}

.bottom-ad-card {
  max-width: 728px;
  width: 100%;
  min-height: 50px;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 8px;
  overflow: hidden;
}

/* Ad Creative Styling */
.ad-creative-container {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 100%;
  padding: 12px;
  font-size: 12px;
}

.ad-badge-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-card);
  padding-bottom: 6px;
  margin-bottom: 10px;
}

.ad-label {
  font-size: 10px;
  font-weight: 800;
  color: var(--text-muted);
  letter-spacing: 0.8px;
}

.ad-timer {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--accent-iris);
  font-weight: 600;
}

.ad-brand-name {
  font-size: 15px;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 4px;
}

.ad-brand-copy {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.4;
}

.ad-footer-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--border-card);
  padding-top: 8px;
  margin-top: 10px;
}

.ad-view-status {
  font-size: 10px;
  color: #10B981;
  font-weight: 700;
}

.ad-cta {
  font-size: 11px;
  font-weight: 800;
  color: var(--accent-iris);
  cursor: pointer;
}

.ad-flash {
  animation: adFlashFade 0.6s ease;
}

/* Modals */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 50;
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  animation: fadeIn 0.2s ease;
}

.modal-dialog {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 24px;
  max-width: 480px;
  width: 100%;
  padding: 24px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
  display: flex;
  flex-direction: column;
  gap: 16px;
  animation: popIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-title {
  font-family: var(--font-editorial);
  font-size: 22px;
  font-weight: 700;
  color: var(--text-main);
}

.modal-close-btn {
  background: transparent;
  border: none;
  font-size: 22px;
  cursor: pointer;
  color: var(--text-muted);
}

/* Stats Grid in Modal */
.stats-grid-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  text-align: center;
}

.stat-cell {
  background: var(--bg-canvas);
  border-radius: 12px;
  padding: 12px 6px;
}

.stat-number {
  font-size: 24px;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--accent-iris);
}

.stat-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-top: 2px;
}

/* Toast Container */
#toast-container {
  position: fixed;
  top: 70px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 60;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.synapse-toast {
  background: var(--text-main);
  color: #FFFFFF;
  padding: 10px 18px;
  border-radius: 20px;
  font-size: 14px;
  font-weight: 700;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.25);
  animation: toastPop 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.toast-amber { background: var(--accent-amber); color: #000; }
.toast-error { background: #EF4444; color: #FFF; }
.toast-success { background: #10B981; color: #FFF; }

.toast-fade {
  opacity: 0;
  transform: translateY(-10px);
  transition: all 0.3s ease;
}

/* Utility */
.hidden { display: none !important; }

/* Animations */
@keyframes tileShake {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-6px); }
  40%, 80% { transform: translateX(6px); }
}

@keyframes tilePop {
  0% { transform: scale(1); }
  50% { transform: scale(1.1) rotate(2deg); }
  100% { transform: scale(1); }
}

@keyframes slideDownFade {
  0% { opacity: 0; transform: translateY(-14px); }
  100% { opacity: 1; transform: translateY(0); }
}

@keyframes toastPop {
  0% { opacity: 0; transform: translateY(-12px) scale(0.9); }
  100% { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes popIn {
  0% { opacity: 0; transform: scale(0.92); }
  100% { opacity: 1; transform: scale(1); }
}

@keyframes fadeIn {
  0% { opacity: 0; }
  100% { opacity: 1; }
}

@keyframes adFlashFade {
  0% { background-color: rgba(94, 72, 232, 0.15); }
  100% { background-color: transparent; }
}