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

:root {
  /* Pip-Boy Monochrome Green Palette */
  --bg-color: #000a00;
  --board-color: #001a00;
  --terminal-green: #18f01b;
  --terminal-green-dim: #0a5a0a;
  --terminal-green-glow: 0 0 8px rgba(24, 240, 27, 0.6);

  --slot-bg: #001100;
  --slot-border: 1px solid var(--terminal-green-dim);

  /* Palette Colors - bright and clearly differentiated */
  --color-1: #f59e0b;
  --color-2: #ffeb3b;
  --color-3: #22c55e;
  --color-4: #a855f7;
  --color-5: #22d3ee;
  --color-6: #c026d3;
  --color-7: #ef4444;
  --color-8: #3b82f6;

  --feedback-none: #001a00;
  --feedback-green: var(--terminal-green);
  --feedback-yellow: #ffeb3b;

  /* Mobile Fit - 8 rows */
  --row-gap: 0.3dvh;
  --slot-size: min(14vw, 5.5dvh);
  --palette-item-size: min(10vw, 5dvh);
  --slit-height: 0.7dvh;
}

/* Short viewport (e.g. iPhone SE with browser chrome): scale down so board + palette fit */
@media (max-height: 560px) {
  :root {
    --slot-size: min(12vw, 4.2dvh);
    --palette-item-size: min(8vw, 4dvh);
    --row-gap: 0.2dvh;
  }
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-user-select: none;
  user-select: none;
  font-family: 'Courier New', Courier, monospace;
}

/* Only the game area disables touch default (for drag-and-drop); modals scroll normally */
.game-container,
.game-container * {
  touch-action: none;
}

html {
  height: 100%;
}

body {
  background-color: var(--bg-color);
  display: flex;
  justify-content: center;
  align-items: stretch;
  min-height: 100%;
  height: 100dvh;
  max-height: 100dvh;
  width: 100vw;
  overflow: hidden;
  color: var(--terminal-green);
  padding-top: env(safe-area-inset-top);
  padding-bottom: env(safe-area-inset-bottom);
  padding-left: env(safe-area-inset-left);
  padding-right: env(safe-area-inset-right);
  box-sizing: border-box;
}

/* CRT EFFECTS */
.crt-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(rgba(18, 16, 16, 0) 50%, rgba(0, 0, 0, 0.1) 50%),
    linear-gradient(90deg, rgba(255, 0, 0, 0.03), rgba(0, 255, 0, 0.01), rgba(0, 0, 255, 0.03));
  background-size: 100% 3px, 3px 100%;
  pointer-events: none;
  z-index: 1000;
  opacity: 0.5;
}

.crt-overlay::after {
  content: " ";
  display: block;
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  background: rgba(18, 16, 16, 0.05);
  opacity: 0;
  z-index: 1001;
  pointer-events: none;
  animation: flicker 0.15s infinite;
}

@keyframes flicker {
  0% {
    opacity: 0.1;
  }

  100% {
    opacity: 0.05;
  }
}

.game-container {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background-color: var(--board-color);
  padding: 10px;
  border: 4px double var(--terminal-green);
  box-shadow: var(--terminal-green-glow);
  max-width: 100vw;
  width: 100%;
  min-width: 0;
  height: 100%;
  min-height: 0;
  align-items: stretch;
  position: relative;
  margin: 0 auto;
  overflow: hidden;
  flex: 1;
}

@media (min-width: 420px) {
  .game-container {
    width: 400px;
  }
}

.sidebar {
  display: flex;
  flex-direction: column;
  width: 100%;
  align-items: center;
  border-bottom: 2px solid var(--terminal-green-dim);
  padding-bottom: 5px;
  margin-bottom: 2px;
}

.timer {
  font-size: 1.2rem;
  font-weight: bold;
  color: var(--terminal-green);
  text-shadow: var(--terminal-green-glow);
  margin: 2px 0;
  font-family: 'Courier New', Courier, monospace;
  border: 1px solid var(--terminal-green-dim);
  padding: 2px 8px;
  background: #000;
}

.board {
  display: flex;
  flex-direction: column;
  gap: var(--row-gap);
  padding: 10px 0;
  flex: 1 1 0;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
  width: 100%;
}

.row {
  display: flex;
  align-items: center;
  gap: 15px;
  padding: 4px 10px;
  width: 100%;
  min-width: 0;
}

.row.active {
  outline: 1px solid var(--terminal-green);
  box-shadow: inset 0 0 10px rgba(24, 240, 27, 0.2);
}

.guess-slots {
  display: flex;
  flex: 1 1 0;
  min-width: 0;
  justify-content: space-between;
  gap: 10px;
}

.slot-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.slot {
  width: var(--slot-size);
  height: var(--slot-size);
  background-color: var(--slot-bg);
  border: var(--slot-border);
  cursor: pointer;
  position: relative;
}

.slot.drag-over {
  border-color: var(--terminal-green);
  box-shadow: 0 0 5px var(--terminal-green);
}

/* Slot Color - full strength, same as palette */
.slot::after {
  content: '';
  position: absolute;
  top: 5%;
  left: 5%;
  width: 90%;
  height: 90%;
  opacity: 1;
}

.slot.c1::after {
  background-color: var(--color-1);
  box-shadow: 0 0 10px var(--color-1);
}

.slot.c2::after {
  background-color: var(--color-2);
  box-shadow: 0 0 10px var(--color-2);
}

.slot.c3::after {
  background-color: var(--color-3);
  box-shadow: 0 0 10px var(--color-3);
}

.slot.c4::after {
  background-color: var(--color-4);
  box-shadow: 0 0 10px var(--color-4);
}

.slot.c5::after {
  background-color: var(--color-5);
  box-shadow: 0 0 10px var(--color-5);
}

.slot.c6::after {
  background-color: var(--color-6);
  box-shadow: 0 0 10px var(--color-6);
}

.slot.c7::after {
  background-color: var(--color-7);
  box-shadow: 0 0 10px var(--color-7);
}

.slot.c8::after {
  background-color: var(--color-8);
  box-shadow: 0 0 10px var(--color-8);
}

.slit {
  width: calc(var(--slot-size) * 0.8);
  height: var(--slit-height);
  background-color: var(--feedback-none);
  border: 1px solid var(--terminal-green-dim);
  transition: all 0.2s;
}

.slit.green {
  background-color: var(--terminal-green);
  box-shadow: 0 0 10px var(--terminal-green);
}

.slit.yellow {
  background-color: var(--feedback-yellow);
  box-shadow: 0 0 10px var(--feedback-yellow);
}

/* Pip-Boy Switch Style */
.row-switch {
  width: 36px;
  height: 20px;
  flex-shrink: 0;
  background-color: #002200;
  border: 1px solid var(--terminal-green-dim);
  border-radius: 0;
  position: relative;
  cursor: not-allowed;
  opacity: 0.4;
}

.row.active .row-switch {
  cursor: pointer;
  opacity: 1;
  border-color: var(--terminal-green);
}

.row-switch::before {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 14px;
  height: 14px;
  background-color: var(--terminal-green-dim);
  transition: all 0.1s;
}

.row-switch.on {
  background-color: #004400;
}

.row-switch.on::before {
  transform: translateX(16px);
  background-color: var(--terminal-green);
  box-shadow: var(--terminal-green-glow);
}

.row-switch.disabled {
  pointer-events: none;
  opacity: 0.6;
}

.sidebar-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 5px;
}

.help-btn {
  width: 26px;
  height: 26px;
  min-width: 26px;
  padding: 0;
  border-radius: 50%;
  font-size: 14px;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.help-modal-content {
  max-width: 320px;
  height: 100%;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.help-modal-scroll {
  flex: 1 1 0;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
}

.help-modal-content h2 {
  margin-top: 0;
  margin-bottom: 16px;
}

.help-modal-scroll p {
  margin: 0 0 12px;
  font-size: 13px;
  line-height: 1.45;
}

.help-modal-scroll p:last-of-type {
  margin-bottom: 0;
}

.help-modal-content ul {
  margin: 0 0 12px;
  padding-left: 1.5em;
  font-size: 13px;
  line-height: 1.45;
  color: var(--terminal-green);
  list-style-type: disc;
  list-style-position: outside;
}

.help-modal-content li {
  color: var(--terminal-green);
}

.help-modal-content li::marker {
  color: var(--terminal-green);
}

.help-modal-content button {
  flex-shrink: 0;
  display: block;
  margin: 1rem auto 0;
}

.palette {
  display: flex;
  flex-direction: row;
  gap: 3px;
  padding: 5px;
  border-top: 2px solid var(--terminal-green-dim);
  width: 100%;
  justify-content: center;
}

.palette-item {
  width: var(--palette-item-size);
  height: var(--palette-item-size);
  cursor: grab;
  border: 1px solid rgba(24, 240, 27, 0.3);
  flex-shrink: 0;
}

.palette-item.c1 {
  background-color: var(--color-1);
  box-shadow: 0 0 10px var(--color-1);
}

.palette-item.c2 {
  background-color: var(--color-2);
  box-shadow: 0 0 10px var(--color-2);
}

.palette-item.c3 {
  background-color: var(--color-3);
  box-shadow: 0 0 10px var(--color-3);
}

.palette-item.c4 {
  background-color: var(--color-4);
  box-shadow: 0 0 10px var(--color-4);
}

.palette-item.c5 {
  background-color: var(--color-5);
  box-shadow: 0 0 10px var(--color-5);
}

.palette-item.c6 {
  background-color: var(--color-6);
  box-shadow: 0 0 10px var(--color-6);
}

.palette-item.c7 {
  background-color: var(--color-7);
  box-shadow: 0 0 10px var(--color-7);
}

.palette-item.c8 {
  background-color: var(--color-8);
  box-shadow: 0 0 10px var(--color-8);
}

.palette-item.active {
  outline: 2px solid var(--terminal-green);
  box-shadow: var(--terminal-green-glow);
}

.solution-display {
  display: flex;
  flex-direction: row;
  gap: 3px;
  padding: 5px;
  border-top: 2px solid var(--terminal-green-dim);
  width: 100%;
  justify-content: center;
  align-items: center;
}

.solution-display .slot {
  cursor: default;
  pointer-events: none;
}

.controls {
  display: flex;
  flex-direction: row;
  gap: 15px;
  margin-top: 5px;
}

button {
  padding: 6px 12px;
  border: 1px solid var(--terminal-green);
  background-color: transparent;
  color: var(--terminal-green);
  cursor: pointer;
  font-weight: bold;
  text-transform: uppercase;
  font-size: 11px;
  text-shadow: var(--terminal-green-glow);
}

button:hover {
  background-color: rgba(24, 240, 27, 0.1);
}

button:active {
  background-color: var(--terminal-green);
  color: #000;
}

.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100dvh;
  background: rgba(0, 5, 0, 0.9);
  display: none;
  justify-content: center;
  align-items: center;
  padding: max(1rem, env(safe-area-inset-top)) max(1rem, env(safe-area-inset-right)) max(1rem, env(safe-area-inset-bottom)) max(1rem, env(safe-area-inset-left));
  box-sizing: border-box;
  overflow: hidden;
  z-index: 3000;
}

.modal--stretch-content {
  align-items: stretch;
}

.modal-content {
  background: #001100;
  border: 2px solid var(--terminal-green);
  color: var(--terminal-green);
  box-shadow: var(--terminal-green-glow);
  text-shadow: var(--terminal-green-glow);
  padding: 40px;
  max-height: 100%;
  max-width: 100%;
  overflow-y: auto;
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
}

.modal-buttons {
  display: flex;
  gap: 12px;
  margin-top: 20px;
  justify-content: center;
  flex-wrap: wrap;
}

.modal-buttons button {
  min-width: 100px;
}

/* Create Challenge modal */
.create-challenge-content {
  max-width: 320px;
}

.create-challenge-content h2 {
  margin-top: 0;
  margin-bottom: 8px;
}

.create-challenge-hint {
  font-size: 13px;
  margin: 0 0 16px;
  color: var(--terminal-green-dim);
}

.challenge-slots {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-bottom: 16px;
}

.challenge-slot {
  width: 44px;
  height: 44px;
  background-color: var(--slot-bg);
  border: var(--slot-border);
  cursor: pointer;
  border-radius: 2px;
}

.challenge-slot.c1 { background-color: var(--color-1); }
.challenge-slot.c2 { background-color: var(--color-2); }
.challenge-slot.c3 { background-color: var(--color-3); }
.challenge-slot.c4 { background-color: var(--color-4); }
.challenge-slot.c5 { background-color: var(--color-5); }
.challenge-slot.c6 { background-color: var(--color-6); }
.challenge-slot.c7 { background-color: var(--color-7); }
.challenge-slot.c8 { background-color: var(--color-8); }

.challenge-palette {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: center;
  margin-bottom: 20px;
}

.challenge-palette .palette-item {
  width: 36px;
  height: 36px;
  cursor: pointer;
}

.create-challenge-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

.create-challenge-buttons button {
  min-width: 100px;
}

.drag-ghost {
  position: fixed;
  pointer-events: none;
  z-index: 2000;
  width: var(--slot-size);
  height: var(--slot-size);
  opacity: 0.8;
  border: 1px solid var(--terminal-green);
  box-shadow: var(--terminal-green-glow);
}