:root {
  /* Colors */
  --color1: #ffe119;
  --color2: #4363f8;
  --color3: #f58231;
  --color4: #fcbeff;
  --color5: #800000;
  --color6: #009055;
  --color7: #604530;
  --color8: #696969;
  --color9: #ffffff;

  --sd-red: #dc322f;
  --sd-green: #859900;
  --dark: #2b3b4b;
  --light: #ada693;
  --light-2: #8d8673;
  --background: var(--light-2);
  --alternate-background: var(--light);
  --text-color: black;
}

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

html,
body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background-color: var(--background);
  font-family: "Inter", sans-serif;
  touch-action: none;
  user-select: none;
}

/* Utility classes */
.hidden {
  display: none !important;
  opacity: 0;
  pointer-events: none;
}

/* Main game container */
#game-container {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  position: relative;
}

/* Top bar with level and stats */
#top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.25rem 1rem;
  font-size: 2rem;
  color: var(--text-color);
  z-index: 100;
  flex-shrink: 0;
}

#level-display {
  font-size: 3rem;
  font-weight: 600;
  font-family: "Inter", sans-serif;
  cursor: pointer;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

#level-display sub {
  font-size: 50%;
  vertical-align: sub;
  line-height: 0;
}

#round-display {
  font-size: 1.5rem;
  min-width: 15%;
  max-width: 15%;
  display: flex;
  align-items: center;
  justify-content: flex-start;
}

/* Brain progress indicator */
#brain-progress {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  min-width: 15%;
  max-width: 15%;
  margin-left: auto;
}

.brain-progress-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
}

.brain-container {
  position: relative;
  width: 5rem;
  height: 5rem;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
  transition: transform 0.3s ease;
  font-family: "Phosphor-Light";
  font-size: 5rem;
  line-height: 1;
}

#fire-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 10;
  /* Optional: makes particles glow against the dark background */
  mix-blend-mode: screen;
}

.brain-container.pop {
  animation: brain-pop 0.6s ease-out;
}

@keyframes brain-pop {
  0% {
    transform: scale(1);
  }
  30% {
    transform: scale(0.9);
  }
  60% {
    transform: scale(1.15);
  }
  80% {
    transform: scale(0.98);
  }
  100% {
    transform: scale(1);
  }
}

.brain-base {
  color: var(--light);
  opacity: 0.3;
}

/* Overall progress fill - solid grey */
.brain-progress-fill {
  position: absolute;
  top: 0;
  left: 0;
  color: #555;
  clip-path: inset(var(--progress-inset, 100%) 0 0 0);
  transition: clip-path 0.5s ease;
}

/* Fire/momentum fill - colorful gradient, only increases on perfect rounds */
.brain-fire-fill {
  position: absolute;
  top: 0;
  left: 0;
  background: linear-gradient(to top, #dc143c, #ff4500, #ffa500, #ffd700);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  clip-path: inset(var(--fire-inset, 100%) 0 0 0);
  transition:
    clip-path 0.5s ease,
    background 1s ease;
  animation-play-state: running;
}

/* Progress text below brain */
.progress-text {
  font-size: 0.9rem;
  color: var(--text-color);
  opacity: 0.7;
  font-weight: 500;
}

/* Grid container - centers the grid */
#grid-container {
  /*flex: 1;*/
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  margin-top: 5rem;
  position: relative;
}

#fillup {
  width: 100%;
  flex: 1;
  position: relative;
}

/* Session stars container */
#session-stars {
  position: absolute;
  top: 30%;
  left: 0;
  right: 0;
  height: 3rem;
  pointer-events: none;
}

@keyframes starGradientShift {
  0% {
    background-position: 0% 50%;
  }
  100% {
    background-position: 100% 50%;
  }
}

.session-star {
  position: absolute;
  top: 0;
  transform: translateX(-50%);
  font-family: "Phosphor-Light";
  font-size: 2rem;
  background-image: linear-gradient(
    90deg,
    #ff8c00,
    #ffa500,
    #ffb733,
    #ffd700,
    #ffb733,
    #ffa500,
    #ff8c00
  );
  background-size: 200% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  opacity: 0.6;
  transition: opacity 0.3s ease;
  animation: starGradientShift 3s linear infinite alternate;
}

.session-star:hover {
  opacity: 1;
}

/* 3x3 grid */
.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(3, 1fr);
  gap: 0.5rem;
  max-width: min(82vw, 70vh);
  max-height: min(82vw, 70vh);
  aspect-ratio: 1;
  width: 100%;
}

/* Individual squares */
.square {
  background-color: var(--alternate-background);
  border-radius: 1rem;
  cursor: pointer;
  position: relative;
  padding: 3rem;
}

.square:active {
  transform: scale(0.95);
}

.square.was-active {
  animation: shake 0.15s ease-in-out;
}

/* Timer border using pseudo-element */
.square.active::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 1rem;
  background-color: var(--active-color);
  animation: timer-countdown var(--timer-duration) linear forwards;
  z-index: 0;
  clip-path: inherit;
}

@keyframes timer-countdown {
  from {
    inset: 43%;
  }
  to {
    inset: 0;
  }
}

/* Shapes for Quad Mode */
/* Shapes for Quad Mode */
.shape-0 {
  clip-path: inset(0% 0% 0% 0% round 1rem);
} /* Square (Rounded) */
.shape-1 {
  clip-path: circle(50% at 50% 50%);
} /* Circle */
.shape-2 {
  clip-path: url(#shape-triangle-up);
} /* Triangle Up */
.shape-3 {
  clip-path: url(#shape-triangle-down);
} /* Triangle Down */
.shape-4 {
  clip-path: url(#shape-diamond);
} /* Diamond */
.shape-5 {
  clip-path: url(#shape-star);
} /* Star */
.shape-6 {
  clip-path: url(#shape-trapezoid);
} /* Trapezoid */
.shape-7 {
  clip-path: url(#shape-pentagon);
} /* Pentagon */
.shape-8 {
  clip-path: url(#shape-octagon);
} /* Octagon */

@keyframes shake {
  0%,
  100% {
    transform: translate(0, 0);
  }
  10% {
    transform: translate(-3px, -2px);
  }
  20% {
    transform: translate(3px, 2px);
  }
  30% {
    transform: translate(-3px, 2px);
  }
  40% {
    transform: translate(3px, -2px);
  }
  50% {
    transform: translate(-3px, -2px);
  }
  60% {
    transform: translate(3px, 2px);
  }
  70% {
    transform: translate(-3px, 1px);
  }
  80% {
    transform: translate(2px, -1px);
  }
  90% {
    transform: translate(-1px, 1px);
  }
}

.square-inner {
  width: 100%;
  height: 100%;
  background-color: var(--alternate-background);
  border-radius: 0.75rem;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  color: var(--text-color);
  font-weight: 600;
  z-index: 1;
}

.square.active .square-inner {
  background-color: transparent;
}

/* Letter circle container */
.letter-circle {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 4rem;
  height: 4rem;
  border-radius: 50%;
  background-color: rgba(141, 134, 115, 0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  font-weight: 600;
  color: var(--active-color);
  z-index: 10;
  /*box-shadow: 0 0 0.5rem rgba(0, 0, 0, 0.2);*/
}

/* Active square styling */
.square.active .square-inner {
  background-color: var(--active-color);
  transition: background-color 0.3s ease;
}

/* Side buttons */
.side-button {
  position: fixed;
  top: 0;
  bottom: 0;
  width: 25%;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(0, 0, 0, 0);
  cursor: pointer;
  z-index: 50;
  transition: background-color 0.2s ease;
}

.side-button:active {
  background-color: rgba(0, 0, 0, 0.1);
}

/* Feedback bar - full height vertical slice at screen edge */
.side-button::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  width: 1.5rem;
  background-color: transparent;
  z-index: -1;
  transition: background-color 0.3s ease;
}

#button-left::before {
  left: 0;
}

#button-right::before {
  right: 0;
}

.side-button.pressed::before {
  background-color: var(--dark);
}

.side-button.correct::before {
  background-color: var(--sd-green);
}

.side-button.incorrect::before {
  background-color: var(--sd-red);
}

.side-button.pressed span {
  color: var(--light);
  opacity: 1;
}

.side-button.correct span,
.side-button.incorrect span {
  color: white;
  opacity: 1;
}

#button-left {
  left: 0;
  writing-mode: vertical-lr;
  text-orientation: upright;
}

#button-left span {
  position: absolute;
  left: 0.1rem;
}

#button-right {
  right: 0;
  writing-mode: vertical-rl;
  text-orientation: upright;
}

#button-right span {
  position: absolute;
  right: 0.1rem;
}

.side-button span {
  font-size: 0.9rem;
  color: var(--text-color);
  letter-spacing: 0.15rem;
  opacity: 0;
  font-weight: 300;
  /*padding: 0.5rem 0.25rem;*/
  transition: opacity 0.3s ease;
}

/* Bottom button */
.bottom-button {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 30%; /* Increased from 15% to 30% */
  display: flex;
  align-items: end;
  justify-content: center;
  background-color: rgba(0, 0, 0, 0);
  cursor: pointer;
  z-index: 60; /* Increased to cover side buttons */
  transition: background-color 0.2s ease;
}

.bottom-button:active {
  background-color: rgba(0, 0, 0, 0.1);
}

/* Feedback bar - horizontal slice at bottom */
.bottom-button::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2.5rem;
  background-color: transparent;
  z-index: -1;
  transition: background-color 0.3s ease;
}

.bottom-button.pressed::before {
  background-color: var(--dark);
}

.bottom-button.correct::before {
  background-color: var(--sd-green);
}

.bottom-button.incorrect::before {
  background-color: var(--sd-red);
}

.bottom-button.pressed span {
  color: var(--light);
  opacity: 1;
}

.bottom-button.correct span,
.bottom-button.incorrect span {
  color: white;
  opacity: 1;
}

.bottom-button span {
  font-size: 1.2rem;
  color: var(--text-color);
  letter-spacing: 0.2rem;
  opacity: 0;
  font-weight: 300;
  padding: 0.5rem 1rem;
  transition: opacity 0.3s ease;
}

/* Bottom Split Buttons (Quad Mode) */
.bottom-split-button {
  position: fixed;
  bottom: 0;
  height: 25%; /* Reduced from 35% to 25% */
  width: 50%; /* Increased from 25% */
  display: flex;
  align-items: end;
  justify-content: center;
  background-color: rgba(0, 0, 0, 0);
  cursor: pointer;
  z-index: 60; /* Higher than side buttons (50) */
  transition: background-color 0.2s ease;
}

/* ... keep other styles ... */

.bottom-split-button::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2.5rem;
  background-color: transparent;
  z-index: -1;
  transition: background-color 0.3s ease;
}

/* ... keep intervening styles ... */

#button-bottom-left {
  left: 0; /* Align to left edge */
  padding-right: 2rem; /* Visual separation from center */
}

#button-bottom-right {
  right: 0; /* Align to right edge */
  left: auto; /* Override previous left positioning */
  padding-left: 2rem; /* Visual separation from center */
}

/* Pause button (middle area) */
.pause-button {
  position: fixed;
  top: 0;
  left: 25%;
  right: 25%;
  bottom: 15%;
  cursor: pointer;
  z-index: 40;
}

/* Modal */
#modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: transparent;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  pointer-events: none;
}

#modal a {
  color: darkgreen;
}

#modal .modal-content {
  pointer-events: auto;
}

.modal-content {
  background-color: var(--background);
  padding: 2rem;
  border-radius: 0.5rem;
  border: 2px solid var(--dark);
  max-width: 95%;
  max-height: 95%;
  overflow-y: auto;
  overflow-x: hidden;
  font-size: 1rem;
  color: var(--text-color);
  font-family: "Monoid", monospace;
}

.modal-content p {
  margin-top: 1rem;
}

.modal-content h2 {
  text-align: center;
}

.modal-content h3 {
  margin-top: 1rem;
}

.modal-content hr {
  margin: 1rem 0;
  border: none;
  border-top: 1px solid var(--text-color);
}

.modal-icon-button {
  margin-top: 1.5rem;
  background: none;
  border: 1px solid var(--text-color);
  color: var(--text-color);
  font-family: "Phosphor-Light";
  font-size: 1.5rem;
  padding: 0.5rem 1rem;
  cursor: pointer;
  border-radius: 0.25rem;
  transition: background 0.2s ease;
  opacity: 0.8;
}

.modal-icon-button:hover {
  background: rgba(0, 0, 0, 0.1);
  opacity: 1;
}

.modal-icon-button:active {
  transform: scale(0.95);
}

.modal-buttons {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
  margin-top: 1.5rem;
}

.modal-buttons .modal-icon-button {
  margin-top: 0;
}

#results-suggestion {
  font-size: 0.85rem;
  opacity: 0.7;
}

#history-list {
  max-height: 60vh;
  overflow-y: auto;
}

/* Fixed-height modals so layout doesn't shift with content */
#modal-history,
#modal-pause {
  height: 90%;
}

#modal-history {
  width: 95%;
  display: flex;
  flex-direction: column;
}

#modal-history #history-list {
  flex: 1;
  min-height: 0;
  max-height: none;
}

/* Calendar view styles */
.calendar-streak {
  text-align: center;
  font-size: 0.85rem;
  opacity: 0.85;
  margin-bottom: 0.75rem;
  letter-spacing: 0.03rem;
}

.streak-icon {
  font-family: "Phosphor-Light";
}

.calendar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--text-color);
}

.calendar-header h3 {
  margin: 0;
  font-size: 1.2rem;
}

.calendar-nav {
  background: none;
  border: 1px solid var(--text-color);
  color: var(--text-color);
  font-size: 1.2rem;
  padding: 0.25rem 0.75rem;
  cursor: pointer;
  border-radius: 0.25rem;
  font-family: "Monoid", monospace;
}

.calendar-nav:hover {
  background: rgba(0, 0, 0, 0.1);
}

.calendar-nav:active {
  transform: scale(0.95);
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 0.25rem;
  margin-bottom: 1rem;
}

.calendar-day-header {
  text-align: center;
  font-size: 0.75rem;
  opacity: 0.6;
  padding: 0.5rem 0;
  font-weight: 600;
}

.calendar-day {
  aspect-ratio: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.1rem;
  border-radius: 0.25rem;
  background: rgba(255, 255, 255, 0.05);
  position: relative;
  font-size: 0.85rem;
  padding: 0.25rem;
}

.calendar-day.empty {
  background: transparent;
}

.calendar-day.has-sessions {
  background: rgba(34, 197, 94, 0.2);
  cursor: pointer;
  border: 1px solid rgba(34, 197, 94, 0.3);
}

.calendar-day.has-sessions:hover {
  background: rgba(34, 197, 94, 0.3);
  transform: scale(1.05);
}

.calendar-day.today {
  border: 2px solid var(--text-color);
  font-weight: 600;
}

.calendar-day.today.has-sessions {
  border: 2px solid rgba(34, 197, 94, 0.8);
}

.calendar-day-number {
  font-size: 0.9rem;
  font-weight: 600;
}

.session-indicator {
  font-size: 0.6rem;
  opacity: 0.8;
  font-weight: 600;
  color: #333;
  line-height: 1;
}

/* Day details panel */
.day-details {
  border-top: 1px solid var(--text-color);
  padding-top: 1rem;
  margin-top: 1rem;
}

.day-details.hidden {
  display: none;
}

.day-details-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.day-details-header h3 {
  margin: 0;
  font-size: 1rem;
}

.close-details {
  background: none;
  border: none;
  color: var(--text-color);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0;
  width: 1.5rem;
  height: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.7;
  line-height: 1;
}

.close-details:hover {
  opacity: 1;
}

.day-sessions {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.session-card {
  padding: 0.5rem;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 0.25rem;
  background: rgba(255, 255, 255, 0.02);
  cursor: pointer;
  transition: background 0.2s ease;
}

.session-card:hover {
  background: rgba(255, 255, 255, 0.05);
}

.session-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
}

.session-info {
  flex: 1;
}

.session-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 0.25rem;
  font-size: 0.9rem;
}

.session-time {
  font-size: 0.7rem;
  opacity: 0.6;
}

.session-stats {
  display: flex;
  gap: 0.75rem;
  font-size: 0.75rem;
  opacity: 0.9;
}

/* Mini progress grid (20x20 pixels) */
.mini-progress-grid {
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  gap: 0;
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.mini-cell {
  width: 2px;
  height: 2px;
  background: rgba(0, 0, 0, 0.2);
}

.mini-cell.empty {
  background: rgba(255, 255, 255, 0.1);
}

.mini-cell.all-correct {
  background: #22c55e;
}

.mini-cell.partial {
  background: #eab308;
}

.mini-cell.incorrect {
  background: #ef4444;
}

.mini-grid-placeholder {
  width: 20px;
  height: 20px;
  background: rgba(0, 0, 0, 0.1);
  border-radius: 2px;
}

/* Custom scrollbar for modal */
.modal-content::-webkit-scrollbar {
  width: 12px;
}

.modal-content::-webkit-scrollbar-track {
  background: var(--alternate-background);
  border-radius: 0.5rem;
}

.modal-content::-webkit-scrollbar-thumb {
  background: var(--dark);
  border-radius: 0.5rem;
  border: 2px solid var(--alternate-background);
}

.modal-content::-webkit-scrollbar-thumb:hover {
  background: var(--text-color);
}

/* Firefox scrollbar styling */
.modal-content {
  scrollbar-width: thin;
  scrollbar-color: var(--dark) var(--alternate-background);
}

/* Progress grid (10x10 matrix showing per-round results) */
.progress-grid {
  display: grid;
  grid-template-columns: repeat(10, 1fr);
  gap: 2px;
  margin: 1rem 0;
  padding: 0.5rem;
  background: rgba(0, 0, 0, 0.1);
  border-radius: 0.5rem;
}

.grid-cell {
  aspect-ratio: 1;
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: rgba(0, 0, 0, 0.2);
  border-radius: 2px;
  overflow: hidden;
}

.grid-cell.empty {
  background: rgba(255, 255, 255, 0.1);
}

.cell-bar {
  flex: 1;
  min-height: 0;
}

/* Responsive adjustments */
@media (min-width: 768px) {
  .modal-content {
    max-width: 600px;
  }

  .side-button span,
  .bottom-button span {
    font-size: 1.2rem;
  }
}

@media (min-width: 1024px) {
  /* Desktop: narrower side buttons */
  .side-button {
    width: 20%;
  }

  .bottom-button {
    left: 20%;
    right: 20%;
  }

  .pause-button {
    left: 20%;
    right: 20%;
  }

  .grid {
    max-width: min(70vw, 65vh);
    max-height: min(70vw, 65vh);
  }

  .square {
    padding: 6rem;
  }

  /* Hover states for desktop */
  .side-button:hover,
  .bottom-button:hover {
    background-color: rgba(0, 0, 0, 0.05);
  }

  .square:hover {
    transform: scale(1.02);
  }
}

/* Mobile: tighter modal and smaller calendar typography */
@media (max-width: 767px) {
  .modal-content {
    padding: 1rem;
  }

  .modal-content h2 {
    font-size: 1.1rem;
  }

  .calendar-header h3 {
    font-size: 0.9rem;
  }

  .calendar-grid {
    gap: 0.15rem;
  }

  .calendar-day {
    padding: 0.15rem;
  }
}

/* Landscape mode adjustments */
@media (orientation: landscape) and (max-height: 600px) {
  #top-bar {
    padding: 0.5rem 1rem;
    font-size: 1.5rem;
  }

  #level-display {
    font-size: 2rem;
  }

  .grid {
    max-width: min(60vw, 70vh);
    max-height: min(60vw, 70vh);
  }
}