:root {
  --bg-void: #05080a;
  --panel: #0b1610;
  --phosphor: #3dffb0;
  --phosphor-soft: #7dffce;
  --phosphor-dim: #1f6b4a;
  --amber: #ffb020;
  --danger: #ff4d4d;
  --line: rgba(61, 255, 176, 0.25);
  --font-display: "VT323", "Courier New", Consolas, monospace;
  --font-body: "Share Tech Mono", Consolas, "Courier New", monospace;
  --fs: 1;
}
* {
  box-sizing: border-box;
  scrollbar-width: thin;
  scrollbar-color: var(--phosphor-dim) #020604;
}
::-webkit-scrollbar {
  width: 9px;
  height: 9px;
}
::-webkit-scrollbar-track {
  background: #020604;
}
::-webkit-scrollbar-thumb {
  background: var(--phosphor-dim);
  border: 1px solid #020604;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--phosphor);
}
::-webkit-scrollbar-corner {
  background: #020604;
}
html,
body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: var(--bg-void);
  overflow: hidden;
}
body {
  font-family: var(--font-body);
  color: var(--phosphor);
  height: 100%;
  display: flex;
  align-items: stretch;
  justify-content: center;
  padding: 18px;
  position: relative;
  overflow: hidden;
}
#app {
  width: 100%;
  max-width: 1180px;
  position: relative;
  display: flex;
  flex-direction: column;
}

.crt-frame {
  position: relative;
  border: 1px solid var(--phosphor-dim);
  border-radius: 6px;
  background: radial-gradient(ellipse at center, #0d1712 0%, #050807 100%);
  box-shadow:
    inset 0 0 60px rgba(0, 0, 0, 0.85),
    inset 0 0 120px rgba(0, 0, 0, 0.6),
    0 0 30px rgba(61, 255, 176, 0.06);
  overflow: hidden;
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  min-height: 0;
}
.crt-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    to bottom,
    rgba(255, 255, 255, 0.025) 0px,
    rgba(255, 255, 255, 0.025) 1px,
    transparent 2px,
    transparent 3px
  );
  pointer-events: none;
  mix-blend-mode: overlay;
  z-index: 5;
}
.crt-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  box-shadow: inset 0 0 140px 40px rgba(0, 0, 0, 0.7);
  pointer-events: none;
  z-index: 6;
  animation: flicker 6s infinite;
}
@keyframes flicker {
  0%,
  97%,
  100% {
    opacity: 1;
  }
  98% {
    opacity: 0.94;
  }
  99% {
    opacity: 0.98;
  }
}
#app.reduced-motion * {
  animation: none !important;
  transition: none !important;
}
.screen-inner {
  position: relative;
  z-index: 1;
  padding: 22px 26px 26px;
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
}

h1,
h2,
h3,
.display {
  font-family: var(--font-display);
  letter-spacing: 0.5px;
}
.glow {
  text-shadow:
    0 0 6px rgba(61, 255, 176, 0.55),
    0 0 14px rgba(61, 255, 176, 0.25);
}

button:focus-visible,
input:focus-visible,
.m-item:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 2px;
}

/* ---- Custom checkbox ---- */
input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  width: 15px;
  height: 15px;
  min-width: 15px;
  border: 1px solid var(--phosphor-dim);
  background: #020604;
  position: relative;
  cursor: pointer;
  margin: 0;
  vertical-align: middle;
  transition:
    background 0.12s ease,
    border-color 0.12s ease;
}
input[type="checkbox"]:hover {
  border-color: var(--phosphor);
}
input[type="checkbox"]:checked {
  background: var(--phosphor);
  border-color: var(--phosphor);
  box-shadow: 0 0 6px rgba(61, 255, 176, 0.6);
}
input[type="checkbox"]:checked::after {
  content: "";
  position: absolute;
  left: 4px;
  top: 1px;
  width: 4px;
  height: 8px;
  border: solid var(--bg-void);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

/* ---- Boot ---- */
#bootScreen {
  padding: 20px 10px;
  min-height: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
#bootLines {
  font-size: calc(16px * var(--fs));
  line-height: 1.7;
  white-space: pre-wrap;
  min-height: 220px;
}
#callsignRow {
  display: none;
  margin-top: 18px;
  font-size: calc(18px * var(--fs));
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
#callsignInput {
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--phosphor-dim);
  color: var(--phosphor);
  font-family: var(--font-body);
  font-size: calc(18px * var(--fs));
  outline: none;
  width: 240px;
  letter-spacing: 1px;
}
#continueRow {
  display: none;
  margin-top: 18px;
  gap: 10px;
  flex-wrap: wrap;
}
.hint-key {
  color: var(--phosphor-dim);
  font-size: 13px;
  margin-top: 6px;
}

/* ---- Onboarding modal ---- */
#onboardOverlay {
  position: fixed;
  inset: 0;
  background: rgba(2, 6, 4, 0.88);
  z-index: 50;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
#onboardCard {
  max-width: 520px;
  max-height: 85vh;
  overflow-y: auto;
  border: 1px solid var(--phosphor);
  background: #04120b;
  padding: 26px 28px;
  box-shadow: 0 0 40px rgba(61, 255, 176, 0.15);
}
#onboardCard h2 {
  margin: 0 0 12px;
  font-size: 26px;
}
#onboardCard p,
#onboardCard li {
  font-size: 14px;
  line-height: 1.6;
  color: var(--phosphor-soft);
}
#onboardCard ul {
  padding-left: 18px;
  margin: 10px 0;
}
#onboardCard code {
  color: var(--phosphor);
}

/* ---- HUD ---- */
#hud {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 12px;
  margin-bottom: 10px;
}
#hud .sys {
  font-size: 26px;
}
#hud .meta {
  font-size: 14px;
  color: var(--phosphor-soft);
  text-align: right;
}
#progBar {
  width: 220px;
  height: 8px;
  border: 1px solid var(--phosphor-dim);
  margin-top: 6px;
  position: relative;
}
#progFill {
  height: 100%;
  background: var(--phosphor);
  width: 0%;
  transition: width 0.4s ease;
  box-shadow: 0 0 8px var(--phosphor);
}

#optionsBar {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
  font-size: 12px;
  color: var(--phosphor-dim);
  border-bottom: 1px solid var(--line);
  padding-bottom: 10px;
  margin-bottom: 16px;
}
#optionsBar label {
  display: flex;
  align-items: center;
  gap: 5px;
  cursor: pointer;
}
#optionsBar button {
  padding: 3px 8px;
  font-size: 12px;
}
#optionsBar .grp {
  display: flex;
  align-items: center;
  gap: 6px;
}

#gameGrid {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 18px;
}
@media (max-width: 760px) {
  #gameGrid {
    grid-template-columns: 1fr;
  }
}

#missionList {
  border: 1px solid var(--line);
  padding: 10px;
}
.m-item {
  padding: 7px 6px;
  font-size: calc(14px * var(--fs));
  display: flex;
  gap: 8px;
  align-items: center;
  border-left: 2px solid transparent;
  color: var(--phosphor-dim);
}
.m-item.unlocked {
  cursor: pointer;
}
.m-item.unlocked:hover {
  background: rgba(61, 255, 176, 0.06);
}
.m-item.locked {
  opacity: 0.45;
}
.m-item.done {
  color: var(--phosphor);
}
.m-item.current {
  color: var(--amber);
  border-left-color: var(--amber);
  background: rgba(255, 176, 32, 0.06);
}
.m-mark {
  width: 16px;
  display: inline-block;
  text-align: center;
}
#missionList .calib {
  border-bottom: 1px dashed var(--line);
  margin-bottom: 6px;
  padding-bottom: 8px;
}

.panel {
  border: 1px solid var(--line);
  padding: 14px 16px;
  margin-bottom: 14px;
}
#content .panel:last-child {
  margin-bottom: 0;
}
#practiceBanner {
  display: none;
  color: var(--amber);
  font-size: 12px;
  margin-bottom: 8px;
  border: 1px dashed var(--amber);
  padding: 5px 8px;
}
#briefing {
  font-size: calc(15px * var(--fs));
  line-height: 1.6;
  min-height: 70px;
  white-space: pre-wrap;
}
#objectiveBox {
  border: 1px dashed var(--amber);
  color: var(--amber);
  padding: 10px 12px;
  font-size: calc(14px * var(--fs));
  margin-top: 10px;
}

#termWrap {
  border: 1px solid var(--phosphor-dim);
  background: #020604;
  padding: 10px;
  position: relative;
  overflow-x: auto;
}
#termGrid {
  font-family: var(--font-body);
  font-size: calc(15px * var(--fs));
  line-height: 1.35;
  white-space: pre;
}
.term-row {
  display: block;
  height: 1.35em;
}
#colorLegend {
  margin-top: 8px;
  font-size: 12px;
  color: var(--amber);
  display: none;
  line-height: 1.6;
}

#toolbarRow {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
}
#toolbarRow button {
  font-size: 12px;
  padding: 5px 9px;
}

#inputRow {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
  flex-wrap: wrap;
}
#promptChevron {
  color: var(--amber);
}
#codeInput {
  flex: 1;
  min-width: 180px;
  background: #020604;
  border: 1px solid var(--phosphor-dim);
  color: var(--phosphor);
  font-family: var(--font-body);
  font-size: calc(15px * var(--fs));
  padding: 8px 10px;
  outline: none;
}
#codeInput:focus {
  border-color: var(--phosphor);
}
button {
  font-family: var(--font-body);
  background: transparent;
  color: var(--phosphor);
  border: 1px solid var(--phosphor-dim);
  padding: 8px 14px;
  cursor: pointer;
  letter-spacing: 0.5px;
}
button:hover {
  border-color: var(--phosphor);
  background: rgba(61, 255, 176, 0.08);
}
button:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}
button.primary {
  border-color: var(--phosphor);
  color: var(--bg-void);
  background: var(--phosphor);
}
button.primary:hover {
  background: var(--phosphor-soft);
}

#feedback {
  margin-top: 10px;
  font-size: calc(15px * var(--fs));
  min-height: 22px;
}
#feedback.granted {
  color: var(--phosphor);
}
#feedback.denied {
  color: var(--danger);
}

#diagnostics {
  margin-top: 6px;
  font-size: 13px;
}
#diagnostics div {
  padding: 2px 0;
}
#diagnostics .yes {
  color: var(--phosphor);
}
#diagnostics .no {
  color: var(--danger);
}

#breakdown {
  margin-top: 10px;
  font-size: 12px;
  color: var(--phosphor-soft);
  display: none;
  border-top: 1px dashed var(--line);
  padding-top: 8px;
}
#breakdown .tok-code {
  color: var(--amber);
}
#breakdown .tok-text {
  color: var(--phosphor);
}

#hintRow {
  margin-top: 6px;
  font-size: 13px;
  color: var(--phosphor-dim);
}
#hintText {
  display: none;
  margin-top: 4px;
  color: var(--amber);
}

#history {
  margin-top: 12px;
  font-size: 13px;
  color: var(--phosphor-dim);
  max-height: 110px;
  overflow-y: auto;
}
#history div {
  padding: 1px 0;
}
#history .ok {
  color: var(--phosphor);
}
#history .no {
  color: var(--danger);
}

details#codex {
  margin-top: 14px;
  font-size: 13px;
  color: var(--phosphor-soft);
}
details#codex summary {
  cursor: pointer;
  color: var(--amber);
}
#codex table {
  border-collapse: collapse;
  margin-top: 8px;
  width: 100%;
}
#codex td {
  padding: 3px 8px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
#codex code {
  color: var(--phosphor);
}
.snippet-btn {
  background: none;
  border: none;
  color: var(--phosphor);
  cursor: pointer;
  padding: 1px 4px;
  font-family: var(--font-body);
  text-decoration: underline dotted;
}
.snippet-btn:hover {
  color: var(--amber);
}

.actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 6px;
}

/* ---- Certificate ---- */
#certScreen {
  display: none;
  padding: 20px 10px;
  text-align: center;
  position: relative;
}
#certBorder {
  border: 3px double var(--phosphor);
  padding: 34px 24px;
  margin: 0 auto;
  max-width: 640px;
  position: relative;
  background: rgba(3, 10, 7, 0.6);
}
#certBorder::before {
  content: "◆";
  position: absolute;
  top: -14px;
  left: -14px;
  background: var(--bg-void);
  padding: 0 4px;
}
#certBorder::after {
  content: "◆";
  position: absolute;
  bottom: -14px;
  right: -14px;
  background: var(--bg-void);
  padding: 0 4px;
}
#certTitle {
  font-size: 38px;
  margin: 0 0 6px;
}
#certSub {
  font-size: 14px;
  color: var(--phosphor-soft);
  letter-spacing: 2px;
  margin-bottom: 22px;
}
#certBody {
  font-size: 16px;
  line-height: 1.7;
}
#certName {
  font-size: 26px;
  color: var(--amber);
  margin: 14px 0;
  font-family: var(--font-display);
  letter-spacing: 1px;
}
#certStats {
  margin-top: 14px;
  font-size: 13px;
  color: var(--phosphor-soft);
}
#certCodes {
  margin-top: 16px;
  font-size: 13px;
  color: var(--phosphor-soft);
  text-align: left;
  display: inline-block;
}
#certStamp {
  margin-top: 22px;
  font-size: 13px;
  color: var(--phosphor-dim);
}
.fade-in {
  animation: fadeIn 0.8s ease both;
}
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.confetti-piece {
  position: fixed;
  top: -12px;
  width: 7px;
  height: 14px;
  z-index: 60;
  pointer-events: none;
  animation: fall linear forwards;
}
@keyframes fall {
  to {
    transform: translateY(105vh) rotate(360deg);
    opacity: 0.3;
  }
}

.small {
  font-size: 12px;
  color: var(--phosphor-dim);
}