*,
*::before,
*::after {
  box-sizing: border-box;
}

:root {
  --c64-blue: #4040c0;
  --c64-light-blue: #a0a0ff;
  --c64-cyan: #80ffff;
  --c64-yellow: #ffff80;
  --bezel: #1a1a22;
  --bezel-inner: #2a2a35;

  /* C64 text grid: 40 columns x 25 rows */
  --c64-shell-y: calc(env(safe-area-inset-top, 0px) + env(safe-area-inset-bottom, 0px) + 40px);
  --c64-shell-x: calc(env(safe-area-inset-left, 0px) + env(safe-area-inset-right, 0px) + 32px);
  --c64-row-h: calc((100dvh - var(--c64-shell-y)) / 25);
  --c64-col-w: calc((100dvw - var(--c64-shell-x)) / 40);
  --c64-unit: min(var(--c64-row-h), var(--c64-col-w));

  --fs-body: clamp(8px, calc(var(--c64-unit) * 0.42), 40px);
  --fs-small: clamp(7px, calc(var(--c64-unit) * 0.34), 22px);
  --fs-title: clamp(8px, calc(var(--c64-unit) * 0.5), 34px);
  --fs-line: clamp(8px, calc(var(--c64-unit) * 0.44), 30px);
  --fs-help: clamp(7px, calc(var(--c64-unit) * 0.38), 26px);
  --fs-fine: clamp(6px, calc(var(--c64-unit) * 0.33), 22px);
  --fs-boot: clamp(8px, min(calc(var(--c64-unit) * 0.52), calc(var(--c64-row-h) * 0.68)), 40px);
  --lh-boot: calc(var(--c64-row-h) * 0.94);
  --fs-score: clamp(12px, calc(var(--c64-unit) * 0.95), 64px);
  --fs-game-msg: clamp(7px, calc(var(--c64-unit) * 0.37), 28px);
  --fs-game-hint: clamp(6px, calc(var(--c64-unit) * 0.31), 22px);
  --fs-chrome: clamp(6px, calc(var(--c64-unit) * 0.30), 20px);
}

/* Palette themes (applied to .crt-screen via data-palette). */
.crt-screen[data-palette="blue"] {
  --scr-bg: #4040c0;
  --scr-fg: #a0a0ff;
  --scr-accent: #80ffff;
  --scr-hi: #ffff80;
}
.crt-screen[data-palette="green"] {
  --scr-bg: #0a1f0a;
  --scr-fg: #4dff6a;
  --scr-accent: #b6ffc2;
  --scr-hi: #eaff7a;
}
.crt-screen[data-palette="amber"] {
  --scr-bg: #251400;
  --scr-fg: #ffb000;
  --scr-accent: #ffd479;
  --scr-hi: #fff0c0;
}
.crt-screen[data-palette="mono"] {
  --scr-bg: #050510;
  --scr-fg: #e8e8ff;
  --scr-accent: #80ffff;
  --scr-hi: #ffff80;
}

html,
body {
  margin: 0;
  height: 100%;
  min-height: 100%;
  background: #0d0d12;
  color: var(--scr-fg, var(--c64-light-blue));
  font-family: "Press Start 2P", "Courier New", monospace;
  font-size: var(--fs-body);
  line-height: calc(var(--c64-unit) * 1.08);
  overflow: hidden;
}

body {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  justify-content: stretch;
  min-height: 100vh;
  min-height: 100dvh;
  padding: 0;
}

.crt-frame {
  position: relative;
  flex: 1;
  display: flex;
  flex-direction: column;
  width: 100%;
  min-height: 0;
  padding: max(6px, env(safe-area-inset-top, 0px)) max(6px, env(safe-area-inset-right, 0px))
    max(6px, env(safe-area-inset-bottom, 0px)) max(6px, env(safe-area-inset-left, 0px));
  background: linear-gradient(145deg, var(--bezel-inner), var(--bezel));
  box-shadow:
    0 0 0 3px #111,
    inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

.crt-frame:fullscreen,
.crt-frame:-webkit-full-screen {
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  max-width: none;
  box-shadow: none;
  padding: max(4px, env(safe-area-inset-top, 0px)) max(4px, env(safe-area-inset-right, 0px))
    max(4px, env(safe-area-inset-bottom, 0px)) max(4px, env(safe-area-inset-left, 0px));
}

.crt-frame:fullscreen .crt-screen,
.crt-frame:-webkit-full-screen .crt-screen {
  width: 100%;
  flex: 1;
  min-height: 0;
  max-height: none;
}

.crt-screen {
  position: relative;
  flex: 1;
  display: flex;
  flex-direction: column;
  width: 100%;
  min-height: 0;
  background: var(--scr-bg, var(--c64-blue));
  color: var(--scr-fg, var(--c64-light-blue));
  border: 4px solid #303050;
  border-radius: 2px;
  overflow: hidden;
  box-shadow: inset 0 0 80px rgba(0, 0, 0, 0.35);
  transition: background 0.25s ease, color 0.25s ease;
}

.chrome-controls {
  position: absolute;
  top: calc(var(--c64-unit) * 0.55);
  right: calc(var(--c64-unit) * 0.55);
  z-index: 12;
  display: flex;
  flex-wrap: wrap;
  gap: calc(var(--c64-unit) * 0.45);
  justify-content: flex-end;
  max-width: calc(100% - var(--c64-unit));
}

.chrome-btn {
  margin: 0;
  padding: calc(var(--c64-unit) * 0.38) calc(var(--c64-unit) * 0.48);
  font-family: inherit;
  font-size: var(--fs-chrome);
  line-height: 1.35;
  color: var(--scr-bg, var(--c64-blue));
  background: var(--scr-fg, var(--c64-light-blue));
  border: max(1px, calc(var(--c64-unit) * 0.06)) solid var(--scr-accent, var(--c64-cyan));
  border-radius: 2px;
  cursor: pointer;
  box-shadow: calc(var(--c64-unit) * 0.12) calc(var(--c64-unit) * 0.12) 0 rgba(0, 0, 0, 0.35);
}

.chrome-btn:hover {
  filter: brightness(1.12);
}

.chrome-btn:active {
  transform: translate(calc(var(--c64-unit) * 0.08), calc(var(--c64-unit) * 0.08));
  box-shadow: calc(var(--c64-unit) * 0.06) calc(var(--c64-unit) * 0.06) 0 rgba(0, 0, 0, 0.35);
}

.chrome-btn:focus-visible {
  outline: max(2px, calc(var(--c64-unit) * 0.08)) solid var(--scr-hi, var(--c64-yellow));
  outline-offset: calc(var(--c64-unit) * 0.15);
}

.chrome-btn-quit {
  background: var(--scr-hi, var(--c64-yellow));
  color: #303070;
}

.chrome-btn.hidden {
  display: none;
}

.scanlines {
  pointer-events: none;
  position: absolute;
  inset: 0;
  z-index: 10;
  opacity: 0.12;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 0, 0, 0.45) 2px,
    rgba(0, 0, 0, 0.45) 4px
  );
}

.screen {
  display: none;
  flex-direction: column;
  flex: 1;
  min-height: 0;
  position: relative;
  z-index: 1;
  padding: calc(var(--c64-unit) * 1.1) calc(var(--c64-unit) * 1.35)
    max(calc(var(--c64-unit) * 1.1), env(safe-area-inset-bottom, 0px));
  overflow: auto;
}

.screen.active {
  display: flex;
}

/* Boot */
#screen-boot {
  padding-top: calc(var(--c64-unit) * 1.5);
}

.boot-output {
  margin: 0;
  font-family: inherit;
  font-size: var(--fs-boot);
  line-height: var(--lh-boot);
  color: var(--scr-fg, var(--c64-light-blue));
  white-space: pre-wrap;
  word-break: break-word;
}

.cursor-blink {
  animation: blink 0.55s step-end infinite;
  color: var(--scr-accent, var(--c64-cyan));
}

@keyframes blink {
  50% {
    opacity: 0;
  }
}

.blink {
  animation: blink-soft 1s step-end infinite;
}

@keyframes blink-soft {
  50% {
    opacity: 0.35;
  }
}

/* Language select */
#screen-language.screen.active {
  justify-content: center;
}

.lang-inner {
  text-align: center;
  margin: auto;
  width: 100%;
  max-width: calc(var(--c64-unit) * 40);
}

.ascii-logo {
  margin: 0 auto calc(var(--c64-unit) * 1.1);
  font-family: "Courier New", Courier, monospace;
  font-size: clamp(7px, calc(var(--c64-unit) * 0.42), 26px);
  line-height: 1.05;
  color: var(--scr-accent, var(--c64-cyan));
  overflow-x: auto;
}

.lang-sub {
  margin: 0 0 calc(var(--c64-unit) * 1);
  font-size: var(--fs-title);
  color: var(--scr-hi, var(--c64-yellow));
}

.lang-prompt {
  margin: 0 0 calc(var(--c64-unit) * 1.3);
  font-size: var(--fs-help);
  color: var(--scr-fg, var(--c64-light-blue));
}

.lang-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: calc(var(--c64-unit) * 1);
  max-width: calc(var(--c64-unit) * 30);
  margin: 0 auto;
}

.flag-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: calc(var(--c64-unit) * 0.45);
  padding: calc(var(--c64-unit) * 0.7);
  font-family: inherit;
  font-size: var(--fs-help);
  color: var(--scr-fg, var(--c64-light-blue));
  background: rgba(0, 0, 0, 0.18);
  border: max(2px, calc(var(--c64-unit) * 0.12)) solid var(--scr-fg, var(--c64-light-blue));
  border-radius: 3px;
  cursor: pointer;
}

.flag-btn:hover,
.flag-btn:focus-visible,
.flag-btn.selected {
  outline: none;
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--scr-hi, var(--c64-yellow));
  color: var(--scr-hi, var(--c64-yellow));
}

.flag-btn.selected {
  box-shadow: 0 0 0 max(2px, calc(var(--c64-unit) * 0.1)) var(--scr-hi, var(--c64-yellow)) inset;
}

.flag-btn svg {
  width: 100%;
  max-width: calc(var(--c64-unit) * 7);
  height: auto;
  border: 2px solid rgba(0, 0, 0, 0.5);
  image-rendering: pixelated;
}

/* Build step */
.step-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: var(--fs-help);
  color: var(--scr-accent, var(--c64-cyan));
  margin-bottom: calc(var(--c64-unit) * 0.9);
  flex-shrink: 0;
}

.step-hours {
  color: var(--scr-hi, var(--c64-yellow));
}

.step-question {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
}

.step-title {
  margin: 0 0 calc(var(--c64-unit) * 1.1);
  font-size: var(--fs-title);
  line-height: 1.4;
  color: var(--scr-hi, var(--c64-yellow));
}

.options-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: calc(var(--c64-unit) * 0.8);
  flex: 1;
  min-height: 0;
}

.option-btn {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  gap: calc(var(--c64-unit) * 0.4);
  text-align: left;
  padding: calc(var(--c64-unit) * 0.85);
  font-family: inherit;
  color: var(--scr-fg, var(--c64-light-blue));
  background: rgba(0, 0, 0, 0.18);
  border: max(2px, calc(var(--c64-unit) * 0.1)) solid var(--scr-fg, var(--c64-light-blue));
  border-radius: 3px;
  cursor: pointer;
}

.option-btn:hover,
.option-btn:focus-visible,
.option-btn.selected {
  outline: none;
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--scr-hi, var(--c64-yellow));
}

.option-btn.selected {
  box-shadow: 0 0 0 max(2px, calc(var(--c64-unit) * 0.1)) var(--scr-hi, var(--c64-yellow)) inset;
}

.option-key {
  font-size: var(--fs-fine);
  color: var(--scr-accent, var(--c64-cyan));
}

.option-label {
  font-size: var(--fs-line);
  color: var(--scr-hi, var(--c64-yellow));
  line-height: 1.3;
}

.option-desc {
  font-size: var(--fs-fine);
  line-height: 1.4;
  opacity: 0.9;
}

/* Typing panel */
.step-typing {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
}

.step-typing.hidden,
.step-question.hidden,
.hidden {
  display: none;
}

.typing-title {
  margin: 0 0 calc(var(--c64-unit) * 0.7);
  font-size: var(--fs-line);
  color: var(--scr-accent, var(--c64-cyan));
}

.typing-scroll {
  flex: 1;
  min-height: 0;
  overflow: auto;
}

.typing-code {
  margin: 0;
  font-family: "Press Start 2P", "Courier New", monospace;
  font-size: clamp(7px, calc(var(--c64-unit) * 0.33), 18px);
  line-height: 1.85;
  color: var(--scr-fg, var(--c64-light-blue));
  white-space: pre-wrap;
  word-break: break-word;
  display: inline;
}

.typing-hours {
  margin: calc(var(--c64-unit) * 0.8) 0 0;
  font-size: var(--fs-help);
  color: var(--scr-hi, var(--c64-yellow));
}

.typing-hours.flash {
  animation: blink-soft 0.5s step-end 3;
}

/* Name your game */
#screen-name.screen.active {
  justify-content: center;
}

.name-inner {
  margin: auto;
  width: 100%;
  max-width: calc(var(--c64-unit) * 36);
  text-align: center;
}

.name-title {
  margin: 0 0 calc(var(--c64-unit) * 1.3);
  font-size: var(--fs-title);
  color: var(--scr-hi, var(--c64-yellow));
}

.name-field {
  display: flex;
  align-items: center;
  gap: calc(var(--c64-unit) * 0.5);
  justify-content: center;
  margin-bottom: calc(var(--c64-unit) * 1.2);
}

.name-prompt-char {
  font-size: var(--fs-title);
  color: var(--scr-accent, var(--c64-cyan));
}

.name-input {
  flex: 1;
  max-width: calc(var(--c64-unit) * 26);
  padding: calc(var(--c64-unit) * 0.4) calc(var(--c64-unit) * 0.5);
  font-family: inherit;
  font-size: var(--fs-line);
  text-transform: uppercase;
  color: var(--scr-hi, var(--c64-yellow));
  background: rgba(0, 0, 0, 0.25);
  border: max(2px, calc(var(--c64-unit) * 0.1)) solid var(--scr-fg, var(--c64-light-blue));
  border-radius: 2px;
  outline: none;
  caret-color: var(--scr-accent, var(--c64-cyan));
}

.name-input:focus {
  border-color: var(--scr-hi, var(--c64-yellow));
}

.name-examples-label {
  margin: 0 0 calc(var(--c64-unit) * 0.6);
  font-size: var(--fs-help);
  color: var(--scr-accent, var(--c64-cyan));
}

.name-examples {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: calc(var(--c64-unit) * 0.6);
  margin-bottom: calc(var(--c64-unit) * 0.4);
}

.name-example-btn {
  padding: calc(var(--c64-unit) * 0.5);
  font-family: inherit;
  font-size: var(--fs-help);
  color: var(--scr-fg, var(--c64-light-blue));
  background: rgba(0, 0, 0, 0.18);
  border: max(2px, calc(var(--c64-unit) * 0.08)) solid var(--scr-fg, var(--c64-light-blue));
  border-radius: 3px;
  cursor: pointer;
}

.name-example-btn:hover,
.name-example-btn:focus-visible {
  outline: none;
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--scr-hi, var(--c64-yellow));
  color: var(--scr-hi, var(--c64-yellow));
}

.name-inner .c64-btn {
  align-self: center;
  margin: calc(var(--c64-unit) * 0.9) auto 0;
}

.name-hint {
  margin: calc(var(--c64-unit) * 0.9) 0 0;
  font-size: var(--fs-fine);
  color: var(--scr-fg, var(--c64-light-blue));
  opacity: 0.75;
}

/* Compile */
#screen-compile.screen.active {
  justify-content: center;
}

.compile-inner {
  margin: auto;
  width: 100%;
  max-width: calc(var(--c64-unit) * 38);
}

.compile-title {
  margin: 0 0 calc(var(--c64-unit) * 1);
  font-size: var(--fs-title);
  color: var(--scr-hi, var(--c64-yellow));
}

.compile-log {
  margin: 0;
  font-family: "Press Start 2P", "Courier New", monospace;
  font-size: clamp(7px, calc(var(--c64-unit) * 0.36), 18px);
  line-height: 1.8;
  color: var(--scr-fg, var(--c64-light-blue));
  white-space: pre-wrap;
  min-height: calc(var(--c64-unit) * 8);
}

.compile-total {
  margin: calc(var(--c64-unit) * 1) 0;
  font-size: var(--fs-line);
  color: var(--scr-accent, var(--c64-cyan));
  text-align: center;
}

.compile-sentence {
  margin: 0 0 calc(var(--c64-unit) * 0.6);
  font-size: var(--fs-help);
  line-height: 1.6;
  color: var(--scr-accent, var(--c64-cyan));
}

.hours-big {
  display: block;
  margin: calc(var(--c64-unit) * 0.5) 0;
  font-size: clamp(28px, calc(var(--c64-unit) * 2.8), 170px);
  line-height: 1.05;
  color: var(--scr-hi, var(--c64-yellow));
  text-shadow: calc(var(--c64-unit) * 0.12) calc(var(--c64-unit) * 0.12) 0 rgba(0, 0, 0, 0.4);
}

.compile-sub-line {
  margin: calc(var(--c64-unit) * 0.6) 0 0;
  font-size: var(--fs-fine);
  line-height: 1.5;
  color: var(--scr-fg, var(--c64-light-blue));
  opacity: 0.85;
}

/* Buttons */
.c64-btn {
  align-self: flex-start;
  margin-top: calc(var(--c64-unit) * 1);
  padding: calc(var(--c64-unit) * 0.55) calc(var(--c64-unit) * 1.1);
  font-family: inherit;
  font-size: var(--fs-line);
  color: var(--scr-bg, var(--c64-blue));
  background: var(--scr-hi, var(--c64-yellow));
  border: max(2px, calc(var(--c64-unit) * 0.1)) solid var(--scr-accent, var(--c64-cyan));
  border-radius: 3px;
  cursor: pointer;
  box-shadow: calc(var(--c64-unit) * 0.12) calc(var(--c64-unit) * 0.12) 0 rgba(0, 0, 0, 0.35);
}

.c64-btn:hover {
  filter: brightness(1.1);
}

.c64-btn:active {
  transform: translate(calc(var(--c64-unit) * 0.08), calc(var(--c64-unit) * 0.08));
}

.c64-btn.hidden {
  display: none;
}

/* Game */
#screen-game {
  flex: 1;
  min-height: 0;
  padding: max(calc(var(--c64-unit) * 0.55), env(safe-area-inset-top, 0px)) calc(var(--c64-unit) * 1)
    max(calc(var(--c64-unit) * 0.65), env(safe-area-inset-bottom, 0px));
  overflow: hidden;
  justify-content: flex-start;
}

.status-bar {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: calc(var(--c64-unit) * 1);
  margin-bottom: calc(var(--c64-unit) * 0.55);
  font-size: var(--fs-score);
  color: var(--scr-accent, var(--c64-cyan));
  flex-shrink: 0;
}

.status-mid {
  font-size: calc(var(--fs-score) * 0.62);
  color: var(--scr-hi, var(--c64-yellow));
}

.game-stage {
  flex: 1;
  min-height: 0;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

#game-canvas {
  display: block;
  flex-shrink: 0;
  width: 640px;
  height: 400px;
  max-width: 100%;
  max-height: 100%;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  background: var(--scr-bg, var(--c64-blue));
  border: 2px solid rgba(160, 160, 255, 0.35);
}

.game-msg {
  margin: calc(var(--c64-unit) * 0.5) 0 0;
  text-align: center;
  font-size: var(--fs-game-msg);
  color: var(--scr-hi, var(--c64-yellow));
  min-height: 1.5em;
  flex-shrink: 0;
}

.game-msg.hidden {
  visibility: hidden;
}

.game-hint {
  margin: calc(var(--c64-unit) * 0.4) 0 0;
  text-align: center;
  font-size: var(--fs-game-hint);
  color: var(--scr-fg, rgba(160, 160, 255, 0.65));
  opacity: 0.7;
  flex-shrink: 0;
}

/* Results */
#screen-results.screen.active {
  justify-content: center;
  text-align: center;
}

.results-inner {
  margin: auto;
}

.results-title {
  margin: 0 0 calc(var(--c64-unit) * 1.1);
  font-size: var(--fs-title);
  color: var(--scr-hi, var(--c64-yellow));
}

.results-body {
  margin: 0 0 calc(var(--c64-unit) * 1.5);
  font-size: var(--fs-line);
  line-height: 1.6;
  color: var(--scr-fg, var(--c64-light-blue));
}

.results-countdown {
  margin: 0;
  font-size: var(--fs-help);
  color: var(--scr-accent, var(--c64-cyan));
}

@media (max-width: 560px) {
  .options-grid,
  .lang-grid {
    grid-template-columns: 1fr;
  }
}