:root {
  --bg: #070b06;
  --panel: #0f170c;
  --panel-soft: #18240f;
  --line: #3d5a2a;
  --green: #8dff5a;
  --green-strong: #c6ff7a;
  --green-dim: #4f7a32;
  --text: #e4f0d0;
  --muted: #8fa77a;
  --red: #ff4d3d;
  --amber: #ffb627;
  --cyan: #c6ff7a;
  --purple: #5d7a36;
  --shadow: 10px 10px 0 rgba(0, 0, 0, 0.38);
  --pixel-font: "Press Start 2P", monospace;
  --text-font: "VT323", monospace;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--bg);
}

body {
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  color: var(--text);
  background:
    radial-gradient(circle at 75% 15%, rgba(62, 90, 34, 0.3), transparent 28rem),
    linear-gradient(135deg, #050904, #0d1609 58%, #070b06);
  font-family: var(--text-font);
}

button,
input {
  font: inherit;
}

button {
  color: inherit;
}

#matrix {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.09;
  pointer-events: none;
}

.scanlines {
  position: fixed;
  inset: 0;
  z-index: 10;
  pointer-events: none;
  opacity: 0.12;
  background: repeating-linear-gradient(
    to bottom,
    transparent 0,
    transparent 3px,
    rgba(0, 0, 0, 0.35) 4px
  );
}

.app-shell {
  position: relative;
  z-index: 2;
  width: min(1440px, 100%);
  min-height: 100vh;
  margin: 0 auto;
  padding: 0 42px 42px;
}

.topbar {
  height: 88px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: flex;
  gap: 14px;
  align-items: center;
  color: inherit;
  text-decoration: none;
}

.brand-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border: 1px solid var(--green);
  color: var(--green);
  font-weight: 700;
  box-shadow: inset 0 0 18px rgba(141, 255, 90, 0.1);
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-family: var(--pixel-font);
  letter-spacing: 0.12em;
}

.brand small {
  margin-top: 3px;
  color: var(--muted);
  font-size: 0.64rem;
  letter-spacing: 0.16em;
}

.system-state {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 12px var(--green);
  animation: pulse 1.8s infinite;
}

.icon-button,
.text-button {
  border: 0;
  background: transparent;
  cursor: pointer;
}

.icon-button {
  margin-left: 18px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  color: var(--green-dim);
  font-size: 0.7rem;
}

.screen {
  display: none;
}

.screen.active {
  display: flex;
  animation: reveal 0.45s ease-out;
}

#intro-screen {
  min-height: calc(100vh - 130px);
  align-items: center;
  justify-content: space-between;
  gap: 7vw;
  padding: 70px 5vw;
}

.intro-copy {
  flex: 1;
  max-width: 650px;
}

.eyebrow {
  margin: 0 0 20px;
  color: var(--green);
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.17em;
}

h1,
h2 {
  margin: 0;
  font-family: var(--pixel-font);
  line-height: 1.12;
  letter-spacing: -0.01em;
}

h1 {
  font-size: clamp(3.5rem, 7vw, 7.4rem);
}

h1 span,
h2 span {
  color: var(--green);
  text-shadow: 0 0 30px rgba(141, 255, 90, 0.18);
}

.lede {
  max-width: 580px;
  margin: 30px 0;
  color: #a6bdb1;
  font-size: clamp(0.92rem, 1.3vw, 1.08rem);
  line-height: 1.8;
}

.intro-actions {
  display: flex;
  align-items: center;
  gap: 24px;
}

.primary-button {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 26px;
  min-height: 52px;
  padding: 0 20px;
  border: 1px solid var(--green);
  border-radius: 1px;
  color: #021308;
  background: var(--green);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  cursor: pointer;
  box-shadow: 0 0 26px rgba(141, 255, 90, 0.12);
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.primary-button:hover {
  transform: translateY(-2px);
  background: #8affbf;
  box-shadow: 0 0 35px rgba(141, 255, 90, 0.22);
}

.text-button {
  padding: 10px 0;
  color: var(--green);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  border-bottom: 1px solid var(--green-dim);
}

.trust-row {
  display: flex;
  gap: 26px;
  margin-top: 42px;
  color: var(--muted);
  font-size: 0.65rem;
  letter-spacing: 0.09em;
}

.trust-row span::before {
  content: "◇";
  margin-right: 8px;
  color: var(--green-dim);
}

.terminal-card {
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.intro-terminal {
  flex: 0 1 520px;
  transform: perspective(1000px) rotateY(-2deg);
}

.terminal-header {
  min-height: 40px;
  padding: 0 14px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.025);
  border-bottom: 1px solid var(--line);
  font-size: 0.62rem;
}

.terminal-header > :last-child {
  justify-self: end;
}

.window-dots {
  display: flex;
  gap: 6px;
}

.window-dots i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #3c5146;
}

.window-dots i:first-child {
  background: #7b3b3e;
}

.terminal-body {
  padding: 28px;
}

.boot-log {
  min-height: 290px;
  padding-top: 48px;
  color: #a4b9ad;
  font-size: 0.8rem;
  line-height: 1.9;
}

.boot-log b {
  color: var(--green);
}

.muted {
  color: #445d50;
}

.prompt-line {
  margin-top: 34px;
  color: var(--green);
}

.typed-text {
  color: var(--text);
}

.prompt-line i {
  display: inline-block;
  width: 8px;
  height: 14px;
  margin-left: 4px;
  background: var(--green);
  vertical-align: -2px;
  animation: blink 0.9s steps(1) infinite;
}

.binary-ribbon {
  overflow: hidden;
  padding: 12px 18px;
  color: rgba(109, 255, 173, 0.25);
  border-top: 1px solid var(--line);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  white-space: nowrap;
}

#game-screen {
  min-height: calc(100vh - 130px);
}

.mission-sidebar {
  width: 275px;
  flex: 0 0 275px;
  padding: 38px 28px 20px 0;
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
}

.operator-card {
  display: flex;
  align-items: center;
  gap: 12px;
}

.avatar {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border: 1px solid var(--green-dim);
  color: var(--green);
  background: rgba(141, 255, 90, 0.06);
  font-weight: 700;
}

.operator-card strong,
.operator-card small {
  display: block;
}

.operator-card strong {
  font-size: 0.78rem;
}

.operator-card small {
  margin-top: 5px;
  color: var(--muted);
  font-size: 0.63rem;
}

.mission-nav {
  margin-top: 48px;
}

.mission-nav ol {
  padding: 0;
  margin: 0;
  list-style: none;
  max-height: 55vh;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--green-dim) transparent;
}

.mission-nav li {
  position: relative;
  min-height: 39px;
  padding: 0 0 11px 36px;
  color: #50675b;
  font-size: 0.68rem;
}

.mission-nav li::before {
  content: attr(data-number);
  position: absolute;
  left: 0;
  top: -5px;
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  border: 1px solid #35493e;
  border-radius: 50%;
  font-size: 0.58rem;
}

.mission-nav li:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 18px;
  bottom: -2px;
  left: 11px;
  width: 1px;
  background: #25362d;
}

.mission-nav li.active {
  color: var(--text);
}

.mission-nav li.active::before {
  color: #041108;
  background: var(--green);
  border-color: var(--green);
  box-shadow: 0 0 14px rgba(141, 255, 90, 0.25);
}

.mission-nav li.complete {
  color: var(--green-dim);
}

.mission-nav li.complete::before {
  content: "✓";
  color: var(--green);
  border-color: var(--green-dim);
}

.sidebar-tip {
  margin-top: auto;
  padding: 16px;
  border: 1px solid var(--line);
  background: rgba(141, 255, 90, 0.025);
}

.sidebar-tip span {
  color: var(--green);
  font-size: 0.62rem;
}

.sidebar-tip p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 0.66rem;
  line-height: 1.6;
}

.workspace {
  min-width: 0;
  flex: 1;
  padding: 38px 0 20px 42px;
}

.workspace-head {
  display: flex;
  justify-content: space-between;
  gap: 30px;
  align-items: flex-start;
}

.workspace-head .eyebrow {
  margin-bottom: 10px;
}

.chapter-badge {
  display: inline-block;
  margin-bottom: 10px;
  padding: 5px 8px;
  color: #041108;
  background: var(--green);
  font-size: 0.57rem;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.workspace h2 {
  font-size: clamp(1.8rem, 3.5vw, 3.4rem);
}

.score-panel {
  min-width: 110px;
  padding: 10px 14px;
  border-left: 1px solid var(--green-dim);
}

.timer-panel {
  min-width: 130px;
  padding: 10px 14px;
  border-left: 1px solid var(--red);
}

.timer-panel[hidden] {
  display: none;
}

.timer-panel span,
.timer-panel strong {
  display: block;
  text-align: right;
}

.timer-panel span {
  color: #bd777a;
  font-size: 0.55rem;
}

.timer-panel strong {
  margin-top: 3px;
  color: var(--red);
  font-size: 1.35rem;
  text-shadow: 0 0 12px rgba(255, 95, 103, 0.25);
}

.score-panel span,
.score-panel strong {
  display: block;
  text-align: right;
}

.score-panel span {
  color: var(--muted);
  font-size: 0.6rem;
}

.score-panel strong {
  margin-top: 3px;
  color: var(--green);
  font-size: 1.35rem;
}

.progress-track {
  height: 2px;
  margin: 26px 0;
  background: #16251d;
}

.progress-fill {
  width: 0;
  height: 100%;
  background: var(--green);
  box-shadow: 0 0 10px var(--green);
  transition: width 500ms ease;
}

.mission-terminal .terminal-body {
  padding: clamp(22px, 3vw, 42px);
}

.comms-panel {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 24px;
  padding: 14px 16px;
  border-left: 2px solid var(--green);
  background: linear-gradient(90deg, rgba(141, 255, 90, 0.07), transparent);
}

.character-avatar {
  width: 38px;
  height: 38px;
  flex: 0 0 38px;
  display: grid;
  place-items: center;
  color: var(--green);
  border: 1px solid var(--green-dim);
  background: #06120c;
  font-size: 0.7rem;
  font-weight: 700;
}

.comms-panel span {
  color: var(--green);
  font-size: 0.61rem;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.comms-panel p {
  margin: 6px 0 0;
  color: #d1e2d8;
  font-size: 0.75rem;
  line-height: 1.55;
}

.story-log {
  min-height: 44px;
  color: #8aa397;
  font-size: 0.74rem;
  line-height: 1.6;
}

.story-log p {
  margin: 0 0 5px;
}

.story-log b {
  color: var(--green);
  font-weight: 500;
}

.lesson-box {
  position: relative;
  margin: 22px 0 30px;
  padding: 18px 20px 18px 56px;
  border: 1px solid rgba(255, 200, 87, 0.25);
  background: rgba(255, 200, 87, 0.035);
}

.lesson-label {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 38px;
  display: grid;
  place-items: center;
  color: var(--amber);
  background: rgba(255, 200, 87, 0.06);
  font-size: 0.58rem;
  writing-mode: vertical-rl;
  letter-spacing: 0.15em;
}

.lesson-box p {
  margin: 0;
  color: #c8d5ce;
  font-size: 0.76rem;
  line-height: 1.7;
}

.challenge {
  text-align: center;
}

.challenge-label {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 0.63rem;
  letter-spacing: 0.15em;
}

.challenge-value {
  color: var(--green);
  font-size: clamp(2.4rem, 6vw, 5.8rem);
  font-weight: 600;
  letter-spacing: 0.15em;
  text-shadow: 0 0 28px rgba(141, 255, 90, 0.17);
  overflow-wrap: anywhere;
}

.challenge-question {
  margin: 14px 0 22px;
  color: #b0c2b8;
  font-size: 0.78rem;
}

.powers-row {
  min-height: 36px;
  display: flex;
  justify-content: center;
  gap: 7px;
  margin: 0 0 20px;
}

.power-chip {
  min-width: 42px;
  padding: 6px;
  color: var(--muted);
  border: 1px solid var(--line);
  font-size: 0.62rem;
}

.power-chip.active {
  color: var(--green);
  border-color: var(--green-dim);
  background: rgba(141, 255, 90, 0.06);
}

#answer-form {
  width: min(560px, 100%);
  margin: 0 auto;
  text-align: left;
}

#answer-form label {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 0.6rem;
  letter-spacing: 0.12em;
}

.answer-row {
  min-height: 56px;
  display: flex;
  align-items: center;
  border: 1px solid var(--green-dim);
  background: #020705;
  box-shadow: inset 0 0 22px rgba(141, 255, 90, 0.03);
}

.shell-prompt {
  padding-left: 18px;
  color: var(--green);
  font-size: 1.2rem;
}

#answer-input {
  min-width: 0;
  flex: 1;
  height: 54px;
  padding: 0 14px;
  border: 0;
  outline: 0;
  color: var(--text);
  caret-color: var(--green);
  background: transparent;
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: 0.18em;
}

.submit-button {
  align-self: stretch;
  min-height: auto;
  border-width: 0 0 0 1px;
}

#input-hint {
  display: block;
  margin-top: 7px;
  color: #4c6558;
  font-size: 0.58rem;
}

.feedback {
  min-height: 54px;
  width: min(560px, 100%);
  margin: 16px auto 0;
  padding: 0;
  text-align: left;
  font-size: 0.7rem;
  line-height: 1.6;
}

.feedback.visible {
  padding: 12px 14px;
  border: 1px solid;
}

.feedback.success {
  color: var(--green);
  border-color: var(--green-dim);
  background: rgba(141, 255, 90, 0.05);
}

.feedback.error {
  color: #ff9ba0;
  border-color: rgba(255, 95, 103, 0.35);
  background: rgba(255, 95, 103, 0.05);
}

.completion-actions {
  width: min(560px, 100%);
  margin: 8px auto 0;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 22px;
}

.completion-actions[hidden] {
  display: none;
}

.workspace-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 18px;
}

.streak {
  color: var(--muted);
  font-size: 0.65rem;
}

.streak strong {
  margin-left: 8px;
  color: var(--green);
  font-size: 1rem;
}

#victory-screen {
  min-height: calc(100vh - 130px);
  align-items: center;
  justify-content: center;
  padding: 50px 0;
}

.victory-card {
  width: min(760px, 100%);
  padding: clamp(34px, 6vw, 70px);
  border: 1px solid var(--green-dim);
  background: radial-gradient(circle at 50% 0, rgba(141, 255, 90, 0.09), transparent 42%),
    var(--panel);
  text-align: center;
  box-shadow: 0 0 70px rgba(141, 255, 90, 0.1);
}

.victory-icon {
  width: 58px;
  height: 58px;
  display: grid;
  place-items: center;
  margin: 0 auto 24px;
  border: 1px solid var(--green);
  border-radius: 50%;
  color: var(--green);
  font-size: 1.8rem;
  box-shadow: 0 0 25px rgba(141, 255, 90, 0.15);
}

.victory-card h2 {
  font-size: clamp(3rem, 7vw, 6rem);
}

.victory-card > p:not(.eyebrow) {
  max-width: 570px;
  margin: 24px auto 34px;
  color: #9fb4a9;
  font-size: 0.85rem;
  line-height: 1.8;
}

.final-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--line);
}

.final-stats div {
  padding: 20px 10px;
}

.final-stats div:not(:last-child) {
  border-right: 1px solid var(--line);
}

.final-stats span,
.final-stats strong {
  display: block;
}

.final-stats span {
  color: var(--muted);
  font-size: 0.58rem;
}

.final-stats strong {
  margin-top: 8px;
  color: var(--green);
  font-size: clamp(0.85rem, 2vw, 1.2rem);
}

.certificate {
  margin: 22px 0 28px;
  padding: 14px;
  border: 1px dashed #385647;
  color: var(--muted);
  font-size: 0.6rem;
}

.certificate code {
  display: block;
  margin-top: 6px;
  color: var(--green);
}

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

@keyframes pulse {
  50% {
    opacity: 0.45;
  }
}

@keyframes reveal {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
}

@media (max-width: 980px) {
  .app-shell {
    padding: 0 24px 30px;
  }

  #intro-screen {
    flex-direction: column;
    align-items: stretch;
    padding: 58px 2vw;
  }

  .intro-terminal {
    flex-basis: auto;
    transform: none;
  }

  .mission-sidebar {
    width: 210px;
    flex-basis: 210px;
  }

  .workspace {
    padding-left: 26px;
  }
}

@media (max-width: 740px) {
  .app-shell {
    padding: 0 16px 24px;
  }

  .topbar {
    height: 72px;
  }

  .system-state > span:not(.status-dot) {
    display: none;
  }

  .icon-button {
    margin-left: 4px;
  }

  #intro-screen {
    min-height: calc(100vh - 90px);
    padding: 48px 0 30px;
  }

  h1 {
    font-size: clamp(3.25rem, 16vw, 5rem);
  }

  .intro-actions,
  .trust-row {
    align-items: flex-start;
    flex-direction: column;
  }

  .trust-row {
    gap: 12px;
  }

  .boot-log {
    min-height: 250px;
    padding: 32px 20px;
  }

  #game-screen {
    display: none;
  }

  #game-screen.active {
    display: block;
  }

  .mission-sidebar {
    width: 100%;
    padding: 22px 0 12px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }

  .mission-sidebar > div:first-child .eyebrow,
  .mission-nav .eyebrow,
  .sidebar-tip {
    display: none;
  }

  .mission-nav {
    margin: 0;
  }

  .mission-nav ol {
    display: flex;
    gap: 7px;
  }

  .mission-nav li {
    width: 22px;
    min-height: 22px;
    padding: 0;
    font-size: 0;
  }

  .mission-nav li::before {
    top: 0;
  }

  .mission-nav li::after {
    display: none;
  }

  .workspace {
    padding: 26px 0 20px;
  }

  .workspace-head {
    align-items: flex-end;
  }

  .terminal-header {
    grid-template-columns: auto 1fr auto;
    gap: 12px;
  }

  .terminal-header > span:nth-child(2) {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .mission-terminal .terminal-body {
    padding: 20px 14px;
  }

  .lesson-box {
    padding-right: 12px;
  }

  .answer-row {
    flex-wrap: wrap;
  }

  .completion-actions {
    align-items: stretch;
    flex-direction: column-reverse;
    gap: 10px;
  }

  .submit-button {
    width: 100%;
    min-height: 48px;
    border-width: 1px 0 0;
  }

  .challenge-value {
    letter-spacing: 0.08em;
  }

  .final-stats {
    grid-template-columns: 1fr;
  }

  .final-stats div:not(:last-child) {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

/* --- Retro pixel-art skin --- */
body {
  image-rendering: pixelated;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 12px 12px, rgba(255, 255, 255, 0.16) 1px, transparent 2px) 0 0 / 80px 80px,
    radial-gradient(circle at 34px 58px, rgba(141, 255, 90, 0.1) 1px, transparent 2px) 0 0 / 120px 120px,
    linear-gradient(transparent 70%, rgba(10, 16, 7, 0.95));
  opacity: 0.7;
}

#matrix {
  opacity: 0.13;
}

.app-shell,
.terminal-card,
.victory-card,
.primary-button,
.icon-button,
.chapter-badge,
.power-chip,
.avatar,
.character-avatar,
.operator-card,
.sidebar-tip,
.lesson-box,
.answer-row,
.final-stats,
.certificate {
  border-radius: 0;
}

.terminal-card,
.victory-card,
.sidebar-tip,
.lesson-box,
.answer-row,
.final-stats {
  border: 3px solid var(--line);
  box-shadow: 8px 8px 0 #020401;
  backdrop-filter: none;
}

.terminal-card {
  background:
    linear-gradient(135deg, rgba(141, 255, 90, 0.05), transparent 36%),
    var(--panel);
}

.brand-mark,
.avatar,
.character-avatar {
  position: relative;
  border: 3px solid var(--green);
  background: #0a1007;
  box-shadow: 4px 4px 0 #020401;
  font-family: var(--pixel-font);
  image-rendering: pixelated;
}

.brand-mark::after,
.avatar::after {
  content: "";
  position: absolute;
  inset: 5px;
  background:
    linear-gradient(var(--green), var(--green)) 6px 6px / 6px 6px,
    linear-gradient(var(--green), var(--green)) 18px 6px / 6px 6px,
    linear-gradient(var(--cyan), var(--cyan)) 6px 18px / 18px 6px;
  background-repeat: no-repeat;
  opacity: 0.35;
}

.brand-mark {
  color: transparent;
}

.brand-mark::before {
  content: "01";
  position: absolute;
  inset: 0;
  z-index: 1;
  display: grid;
  place-items: center;
  color: var(--green);
}

.system-state,
.eyebrow,
.terminal-header,
.brand small,
.operator-card small,
.mission-nav li,
.sidebar-tip span,
.challenge-label,
#answer-form label,
#input-hint,
.trust-row,
.streak,
.score-panel span,
.timer-panel span,
.final-stats span,
.certificate,
.mission-code {
  font-family: var(--pixel-font);
}

.system-state,
.terminal-header,
.brand small,
.operator-card small,
.challenge-label,
#answer-form label,
#input-hint,
.trust-row,
.streak,
.score-panel span,
.timer-panel span,
.final-stats span,
.certificate {
  font-size: 8px;
  letter-spacing: 0.08em;
}

.eyebrow {
  color: var(--cyan);
  font-size: 10px;
  text-shadow: 2px 2px 0 #020401;
}

h1 {
  font-size: clamp(2.2rem, 5.2vw, 5rem);
  text-shadow: 5px 5px 0 #020401;
}

.workspace h2 {
  font-size: clamp(1.15rem, 2.1vw, 2.2rem);
  text-shadow: 3px 3px 0 #020401;
}

h1 span,
h2 span {
  text-shadow: 5px 5px 0 #020401, 0 0 28px rgba(141, 255, 90, 0.24);
}

.lede,
.story-log,
.lesson-box p,
.challenge-question,
.comms-panel p,
.sidebar-tip p,
.victory-card > p:not(.eyebrow) {
  font-size: clamp(1.15rem, 1.7vw, 1.45rem);
  line-height: 1.25;
  letter-spacing: 0;
}

.primary-button,
.icon-button,
.text-button,
.chapter-badge,
.power-chip,
.submit-button {
  font-family: var(--pixel-font);
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 0;
}

.primary-button {
  border: 3px solid #041108;
  color: #041108;
  background:
    linear-gradient(var(--green), var(--green)) padding-box,
    repeating-linear-gradient(90deg, rgba(0, 0, 0, 0.16) 0 4px, transparent 4px 8px);
  box-shadow: 6px 6px 0 #020401, inset 0 -8px 0 rgba(0, 0, 0, 0.18);
}

.primary-button:hover {
  transform: translate(2px, 2px);
  box-shadow: 4px 4px 0 #020401, inset 0 -6px 0 rgba(0, 0, 0, 0.15);
}

.primary-button:active {
  transform: translate(6px, 6px);
  box-shadow: 0 0 0 #020401;
}

.icon-button,
.text-button {
  border: 3px solid var(--line);
  color: var(--cyan);
  background: #0a1007;
  box-shadow: 4px 4px 0 #020401;
}

.text-button {
  border-bottom-width: 3px;
}

.chapter-badge {
  border: 3px solid #041108;
  box-shadow: 4px 4px 0 #020401;
}

.terminal-header {
  background: #1a2612;
  color: #a8c48c;
  border-bottom: 3px solid var(--line);
}

.window-dots i {
  border-radius: 0;
  box-shadow: 1px 1px 0 #020401;
}

.window-dots i:first-child { background: var(--red); }
.window-dots i:nth-child(2) { background: var(--amber); }
.window-dots i:last-child { background: var(--green); }

.pixel-city {
  height: 54px;
  border-bottom: 3px solid var(--line);
  background:
    linear-gradient(var(--purple), var(--purple)) 18px 26px / 34px 28px,
    linear-gradient(#3e5a22, #3e5a22) 62px 14px / 42px 40px,
    linear-gradient(var(--cyan), var(--cyan)) 118px 32px / 28px 22px,
    linear-gradient(#2c4219, #2c4219) 158px 20px / 58px 34px,
    linear-gradient(#18240f, #18240f) 0 100% / 100% 28px;
  background-repeat: no-repeat;
}

.pixel-city span {
  position: relative;
  display: inline-block;
  width: 4px;
  height: 4px;
  margin: 8px 10px;
  background: var(--amber);
  box-shadow: 16px 0 var(--amber), 32px 0 var(--cyan), 54px 6px var(--amber);
  animation: blink 1.6s steps(1) infinite;
}

.boot-log {
  font-size: 1.35rem;
  line-height: 1.4;
}

.prompt-line i {
  border-radius: 0;
}

.mission-nav li::before,
.mission-nav li.complete::before {
  border: 3px solid var(--line);
  border-radius: 0;
  box-shadow: 3px 3px 0 #020401;
}

.mission-nav li.active::before {
  box-shadow: 3px 3px 0 #020401;
}

.comms-panel {
  border: 3px solid var(--line);
  background: #0a1007;
  box-shadow: 6px 6px 0 #020401;
}

.character-avatar {
  font-size: 9px;
  overflow: hidden;
}

.character-avatar::before,
.character-avatar::after {
  content: "";
  position: absolute;
  width: 6px;
  height: 6px;
  top: 12px;
  background: var(--green);
}

.character-avatar::before { left: 10px; }
.character-avatar::after { right: 10px; }

.character-avatar[data-character="WD"]::before,
.character-avatar[data-character="WD"]::after {
  background: var(--red);
  box-shadow: 0 -7px 0 var(--red);
}

.character-avatar[data-character="BT"]::before,
.character-avatar[data-character="BT"]::after {
  background: var(--cyan);
}

.lesson-box {
  border-color: var(--amber);
  background: #211c0c;
}

.lesson-label {
  color: #1a1010;
  background: var(--amber);
  border-right: 3px solid var(--line);
  font-family: var(--pixel-font);
  font-size: 8px;
}

.challenge-value {
  font-family: var(--pixel-font);
  letter-spacing: 0.08em;
  text-shadow: 6px 6px 0 #020401, 0 0 24px rgba(141, 255, 90, 0.2);
}

.power-chip {
  color: var(--muted);
  border: 3px solid var(--line);
  background: #0a1007;
  box-shadow: 3px 3px 0 #020401;
}

.power-chip.active {
  color: #041108;
  border-color: #041108;
  background: var(--green);
}

.answer-row {
  border: 3px solid var(--green);
  background: #040703;
}

.shell-prompt,
#answer-input {
  font-family: var(--pixel-font);
}

#answer-input {
  font-size: 0.95rem;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.progress-track {
  height: 12px;
  border: 3px solid var(--line);
  background: #040703;
}

.progress-fill {
  background: repeating-linear-gradient(90deg, var(--green) 0 8px, var(--cyan) 8px 10px);
  box-shadow: none;
  transition: width 500ms steps(8);
}

.feedback {
  font-size: 1.25rem;
}

.feedback.visible {
  border-width: 3px;
  box-shadow: 5px 5px 0 #020401;
}

.victory-icon {
  border: 4px solid var(--green);
  border-radius: 0;
  font-family: var(--pixel-font);
  box-shadow: 6px 6px 0 #020401;
}

.final-stats div:not(:last-child) {
  border-right: 3px solid var(--line);
}

.certificate {
  border: 3px dashed var(--cyan);
}

@media (max-width: 740px) {
  h1 {
    font-size: clamp(2rem, 12vw, 3.8rem);
  }

  .lede,
  .story-log,
  .lesson-box p,
  .challenge-question,
  .comms-panel p,
  .sidebar-tip p,
  .victory-card > p:not(.eyebrow) {
    font-size: 1.2rem;
  }

  .workspace-head {
    flex-wrap: wrap;
  }
}

/* --- Military field skin + map / defense modes --- */
#game-screen.active,
#defense-screen.active {
  display: block;
  padding: 18px 0 30px;
}

.hud {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.hud-zone {
  display: flex;
  align-items: center;
  gap: 12px;
}

.hud-zone .chapter-badge {
  margin: 0;
}

.hud-zone strong {
  font-family: var(--pixel-font);
  font-size: clamp(0.7rem, 2vw, 1rem);
  color: var(--green);
  text-shadow: 3px 3px 0 #020401;
}

.hud-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.hud .score-panel {
  min-width: 96px;
  padding: 6px 10px;
}

.shields strong {
  color: var(--green);
  letter-spacing: 0.1em;
}

.zone-select {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--pixel-font);
  font-size: 0.55rem;
  color: var(--muted);
}

.zone-select select {
  padding: 6px 8px;
  border: 3px solid var(--line);
  color: var(--text);
  background: var(--panel);
  font-family: var(--text-font);
  font-size: 1.1rem;
  box-shadow: 4px 4px 0 #020401;
}

.objective {
  margin: 12px 0;
  padding: 10px 14px;
  border: 3px solid var(--amber);
  color: var(--amber);
  background: #1a1506;
  font-size: 1.35rem;
  box-shadow: 6px 6px 0 #020401;
}

.map-frame {
  position: relative;
  max-width: 960px;
  margin: 0 auto;
  border: 4px solid var(--line);
  background: #000;
  box-shadow: 10px 10px 0 #020401, 0 0 0 4px #0c1308;
}

#map-canvas,
#defense-canvas {
  display: block;
  width: 100%;
  height: auto;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  touch-action: none;
}

#map-canvas.zone-flash {
  animation: zone-flash 0.6s steps(4);
}

@keyframes zone-flash {
  0% { filter: brightness(3) saturate(0); }
  100% { filter: none; }
}

.radio-bar {
  display: flex;
  gap: 14px;
  align-items: center;
  max-width: 960px;
  margin: 16px auto 0;
  padding: 12px 14px;
  border: 3px solid var(--line);
  background: #0a1007;
  box-shadow: 6px 6px 0 #020401;
}

.radio-bar span {
  font-family: var(--pixel-font);
  font-size: 0.55rem;
  color: var(--green);
}

.radio-bar p {
  margin: 6px 0 0;
  font-size: 1.35rem;
  color: var(--text);
}

.controls-row {
  display: flex;
  gap: 20px;
  align-items: center;
  justify-content: space-between;
  max-width: 960px;
  margin: 14px auto 0;
}

.controls-hint {
  margin: 0;
  color: var(--muted);
  font-size: 1.2rem;
}

.controls-hint b {
  color: var(--green);
}

.legend-chip {
  padding: 0 4px;
  border: 2px solid currentColor;
}

.legend-chip.t { color: var(--amber); }
.legend-chip.d { color: #d9a521; }
.legend-chip.e { color: var(--green); }

.dpad {
  display: none;
  grid-template-columns: repeat(3, 54px);
  grid-template-rows: repeat(3, 54px);
  gap: 6px;
  flex: 0 0 auto;
}

.dpad button {
  border: 3px solid var(--line);
  color: var(--green);
  background: var(--panel-soft);
  font-size: 1.3rem;
  box-shadow: 4px 4px 0 #020401;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
}

.dpad button:active {
  transform: translate(3px, 3px);
  box-shadow: none;
}

.dpad [data-dir="up"] { grid-column: 2; grid-row: 1; }
.dpad [data-dir="left"] { grid-column: 1; grid-row: 2; }
.dpad .dpad-action { grid-column: 2; grid-row: 2; color: #020401; background: var(--amber); font-family: var(--pixel-font); font-size: 0.8rem; }
.dpad [data-dir="right"] { grid-column: 3; grid-row: 2; }
.dpad [data-dir="down"] { grid-column: 2; grid-row: 3; }

@media (pointer: coarse), (max-width: 740px) {
  .dpad {
    display: grid;
  }

  .controls-row {
    flex-direction: column;
  }
}

.mission-modal {
  position: fixed;
  inset: 0;
  z-index: 50;
  overflow-y: auto;
  padding: 24px 16px 40px;
  background: rgba(2, 6, 2, 0.97);
}

.mission-modal[hidden] {
  display: none;
}

.mission-modal .workspace {
  max-width: 900px;
  margin: 0 auto;
  padding: 0;
}

.mission-modal.bomb .mission-terminal {
  border-color: var(--red);
  box-shadow: 8px 8px 0 #020401, 0 0 0 3px #3a0d08;
}

.mission-modal.exploded {
  animation: explode 0.7s steps(6);
}

@keyframes explode {
  0% { background: rgba(255, 182, 39, 0.9); transform: translate(6px, -4px); }
  30% { background: rgba(255, 77, 61, 0.8); transform: translate(-6px, 4px); }
  60% { background: rgba(60, 10, 5, 0.9); transform: translate(3px, 2px); }
  100% { background: rgba(2, 6, 2, 0.97); transform: none; }
}

.close-button[hidden] {
  display: none;
}

.operator-tag {
  font-family: var(--pixel-font);
  font-size: 0.55rem;
  color: var(--muted);
}

.defense-frame {
  max-width: 900px;
}

.defense-overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 16px;
  background: rgba(3, 8, 3, 0.78);
}

.defense-overlay[hidden] {
  display: none;
}

.overlay-card {
  max-width: 520px;
  padding: 22px;
  border: 3px solid var(--green);
  background: var(--panel);
  box-shadow: 8px 8px 0 #020401;
  text-align: center;
}

.overlay-card h2 {
  margin: 10px 0;
  color: var(--green);
  font-size: clamp(1rem, 3vw, 1.6rem);
}

.overlay-card p:not(.eyebrow) {
  color: var(--text);
  font-size: 1.3rem;
}

.overlay-card b {
  color: var(--amber);
}

.defense-console {
  max-width: 900px;
  margin: 16px auto 0;
  padding: 16px;
}

.target-value {
  margin: 6px 0;
  color: var(--green);
  font-family: var(--pixel-font);
  font-size: clamp(0.9rem, 3vw, 1.5rem);
  text-shadow: 4px 4px 0 #020401;
  word-break: break-word;
}

#defense-input {
  flex: 1;
  min-width: 0;
  padding: 12px 14px;
  border: 0;
  outline: 0;
  color: var(--green);
  background: transparent;
  font-family: var(--pixel-font);
  font-size: clamp(0.9rem, 3vw, 1.3rem);
  letter-spacing: 0.12em;
}

#defense-hint {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-size: 1.1rem;
}

#defense-hint b {
  color: var(--green);
}

.binary-ribbon {
  color: rgba(141, 255, 90, 0.3);
}

@media (min-width: 741px) {
  .map-frame,
  .radio-bar,
  .controls-row {
    max-width: min(960px, calc((100vh - 330px) * 1.43));
    min-width: 520px;
  }

  .defense-frame,
  .defense-console {
    max-width: min(900px, calc((100vh - 330px) * 1.6));
    min-width: 560px;
  }
}

.keypad {
  display: none;
}

.touch-ui .keypad:not(:empty) {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(52px, 1fr));
  gap: 6px;
  margin-top: 10px;
}

.touch-ui .keypad-binary:not(:empty) {
  grid-template-columns: repeat(3, 1fr);
}

.touch-ui .keypad-flags:not(:empty) {
  grid-template-columns: repeat(5, 1fr);
}

.keypad button {
  min-height: 48px;
  border: 3px solid var(--line);
  color: var(--green);
  background: var(--panel-soft);
  font-family: var(--pixel-font);
  font-size: 0.9rem;
  box-shadow: 3px 3px 0 #020401;
  touch-action: manipulation;
  user-select: none;
  -webkit-user-select: none;
}

.keypad-binary button {
  min-height: 64px;
  font-size: 1.4rem;
}

.keypad button:active {
  transform: translate(2px, 2px);
  box-shadow: none;
}

.keypad .flag {
  color: var(--amber);
  border-color: #7a5a12;
}

.keypad .back {
  color: var(--red);
}

.keypad .nav {
  color: #020401;
  background: var(--green-dim);
}

.touch-ui #answer-input,
.touch-ui #defense-input {
  caret-color: transparent;
}

.map-overlay {
  z-index: 5;
}

.sum-grid {
  --cell: clamp(44px, 11vw, 72px);
  display: inline-grid;
  grid-template-columns: repeat(var(--cols, 5), var(--cell));
  gap: 6px 8px;
  justify-content: center;
  margin: 8px auto 4px;
  font-family: var(--pixel-font);
}

.sum-grid.compact {
  --cell: clamp(32px, 8vw, 40px);
  display: grid;
  justify-content: start;
}

.sum-grid[hidden] {
  display: none;
}

.sum-cell {
  display: grid;
  place-items: center;
  height: var(--cell);
  padding: 0;
  color: var(--green);
  font-family: var(--pixel-font);
  font-size: calc(var(--cell) * 0.5);
  line-height: 1;
  text-shadow: 3px 3px 0 #020401;
}

button.sum-cell {
  border: 3px dashed var(--line);
  -webkit-tap-highlight-color: transparent;
  background: #0a1007;
  cursor: pointer;
  touch-action: manipulation;
}

.sum-cell.carry {
  height: calc(var(--cell) * 0.6);
  color: var(--amber);
  border-color: #7a5a12;
  font-size: calc(var(--cell) * 0.32);
}

.sum-cell.sign {
  color: var(--amber);
}

.sum-cell.lost {
  color: var(--red);
}

button.sum-cell.result {
  border: 3px solid var(--green-dim);
}

button.sum-cell:hover {
  border-color: var(--green);
}

.sum-line {
  grid-column: 1 / -1;
  height: 4px;
  background: var(--green);
  box-shadow: 3px 3px 0 #020401;
}

.sum-help {
  grid-column: 1 / -1;
  color: var(--muted);
  font-family: var(--text-font);
  font-size: 1.05rem;
  text-align: center;
}

.sum-grid.compact .sum-help {
  text-align: left;
}