:root {
  --bg: #06060c;
  --bg-soft: #0a0d18;
  --panel: #08090f;
  --panel-edge: rgba(57, 255, 20, 0.22);
  --panel-edge-hot: rgba(57, 255, 20, 0.55);

  --ink: #d8f3dc;
  --ink-dim: rgba(216, 243, 220, 0.55);
  --ink-faint: rgba(216, 243, 220, 0.28);

  --green: #39ff14;
  --green-soft: rgba(57, 255, 20, 0.18);
  --green-dim: #5fa86d;
  --amber: #ffb000;
  --amber-soft: rgba(255, 176, 0, 0.18);

  --pad: clamp(14px, 2.4vw, 20px);

  --font-mono: ui-monospace, "JetBrains Mono", "Cascadia Mono", "SF Mono", Menlo, Consolas, "Courier New", monospace;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

html {
  scrollbar-gutter: stable;
}

body {
  min-height: 100vh;
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
  background-image:
    radial-gradient(ellipse at top, rgba(57, 255, 20, 0.06), transparent 55%),
    radial-gradient(ellipse at 80% 90%, rgba(57, 255, 20, 0.04), transparent 60%);
  background-attachment: fixed;
  overflow-x: hidden;
}

/* CRT scanline overlay — fixed, non-shaking */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1000;
  background: repeating-linear-gradient(
    to bottom,
    rgba(255, 255, 255, 0.025) 0px,
    rgba(255, 255, 255, 0.025) 1px,
    transparent 1px,
    transparent 3px
  );
  mix-blend-mode: overlay;
}

a {
  color: var(--green);
  text-decoration: none;
  border-bottom: 1px dotted rgba(57, 255, 20, 0.4);
  transition: color 0.12s, border-color 0.12s, text-shadow 0.12s;
}

a:hover,
a:focus-visible {
  color: var(--green);
  border-bottom-color: var(--green);
  text-shadow: 0 0 8px var(--green-soft);
  outline: none;
}

h1, h2, h3 {
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: 0.06em;
  margin: 0;
  text-transform: uppercase;
  color: var(--green);
  text-shadow: 0 0 8px var(--green-soft);
}

p {
  margin: 0 0 8px;
}

p:last-child { margin-bottom: 0; }

code {
  padding: 1px 6px;
  background: rgba(57, 255, 20, 0.08);
  color: var(--green);
  font-size: 0.95em;
  border: 1px solid rgba(57, 255, 20, 0.2);
}

strong {
  color: var(--green);
  font-weight: 700;
}

/* Layout shell — keep old structure */
.app {
  width: min(960px, calc(100vw - 24px));
  margin: 0 auto;
  padding: 20px 0 32px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

/* Top header (site-header > brand-row > eyebrow + site-nav) */
.site-header {
  border: 1px solid var(--panel-edge);
  background: var(--panel);
  padding: 12px var(--pad);
}

.brand-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.eyebrow {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--green);
  text-shadow: 0 0 6px var(--green-soft);
}

.eyebrow::before {
  content: "▌ ";
  color: var(--green-dim);
}

a.eyebrow,
a.brand-link {
  border-bottom: none;
  color: var(--green);
}

a.brand-link:hover,
a.brand-link:focus-visible {
  color: var(--green);
  text-shadow: 0 0 10px var(--green-soft);
}

.site-nav {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.site-nav a {
  font-size: 16px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-dim);
  border-bottom: none;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--green);
  text-shadow: 0 0 6px var(--green-soft);
}

/* HUD header (title + controls-bar) — borderless so it reads as a section heading, not a floating box */
.hud {
  border: none;
  background: transparent;
  padding: 6px 0 4px;
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  border-bottom: 1px dashed rgba(57, 255, 20, 0.18);
  padding-bottom: 14px;
}

.title {
  margin: 0;
  font-size: clamp(22px, 3.6vw, 30px);
  letter-spacing: 0.12em;
  color: var(--ink);
  text-shadow:
    0 0 8px rgba(57, 255, 20, 0.5),
    0 0 18px rgba(57, 255, 20, 0.18);
  flex: 1 1 auto;
}

.title::before {
  content: "> ";
  color: var(--green);
}

.controls-bar {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.controls-bar button {
  appearance: none;
  font-family: inherit;
  font-size: 14px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 11px 18px;
  background: transparent;
  color: var(--green);
  border: 1px solid var(--green);
  cursor: pointer;
  transition: background 0.1s, color 0.1s, transform 0.08s, box-shadow 0.12s;
  text-shadow: 0 0 6px var(--green-soft);
}

.controls-bar button:hover,
.controls-bar button:focus-visible {
  background: var(--green);
  color: var(--bg);
  text-shadow: none;
  outline: none;
  box-shadow: 0 0 12px var(--green-soft);
}

/* Game shell + canvas */
.game-shell {
  border: 1px solid var(--panel-edge);
  background: var(--panel);
  padding: 14px;
  box-shadow: 0 0 24px rgba(57, 255, 20, 0.08);
}

.canvas-wrap {
  position: relative;
  border: 1px solid rgba(57, 255, 20, 0.3);
  background: #04050a;
}

canvas {
  display: block;
  width: 100%;
  height: auto;
  touch-action: none;
  background: #04050a;
}

/* HUD overlay on top of canvas — flex distribution, all left-aligned */
.canvas-hud {
  position: absolute;
  top: 10px;
  left: 14px;
  right: 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  font-size: clamp(13px, 1.9vw, 16px);
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--green);
  text-shadow: 0 0 6px var(--green-soft), 0 1px 3px rgba(0, 0, 0, 0.95);
  font-variant-numeric: tabular-nums;
  pointer-events: none;
  text-transform: uppercase;
}

.canvas-hud span {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.canvas-hud__score {
  flex: 0 0 auto;
}

.canvas-hud__stage {
  flex: 1 1 auto;
  min-width: 0;
  text-align: center;
  color: var(--ink);
  text-shadow: 0 0 6px rgba(216, 243, 220, 0.4), 0 1px 3px rgba(0, 0, 0, 0.95);
}

.canvas-hud__balls {
  flex: 0 0 auto;
}

.canvas-hud__lives {
  flex: 0 0 auto;
  color: var(--amber);
  text-shadow: 0 0 6px var(--amber-soft), 0 1px 3px rgba(0, 0, 0, 0.95);
}

/* Mobile controls */
.mobile-controls {
  display: none;
  gap: 10px;
  margin-top: 12px;
}

.mobile-controls button {
  appearance: none;
  flex: 1;
  min-height: 56px;
  font-size: 22px;
  font-family: inherit;
  background: transparent;
  color: var(--green);
  border: 1px solid var(--green);
  cursor: pointer;
  text-shadow: 0 0 8px var(--green-soft);
}

.mobile-controls button:active {
  background: var(--green-soft);
}

/* Stage select */
.stage-select {
  border: 1px solid var(--panel-edge);
  background: var(--panel);
  padding: var(--pad);
}

.stage-select h2 {
  margin: 0 0 12px;
  font-size: 16px;
  letter-spacing: 0.16em;
  display: flex;
  align-items: center;
  gap: 8px;
}

.stage-select h2::before {
  content: "■";
  font-size: 9px;
  color: var(--green);
}

.stage-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 8px;
}

.stage-btn {
  appearance: none;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  padding: 10px 12px;
  background: rgba(57, 255, 20, 0.04);
  border: 1px solid rgba(57, 255, 20, 0.22);
  color: var(--ink);
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: background 0.1s, border-color 0.1s, transform 0.08s;
}

.stage-btn:hover,
.stage-btn:focus-visible {
  background: rgba(57, 255, 20, 0.1);
  border-color: var(--green);
  outline: none;
  transform: translate(-1px, -1px);
}

.stage-btn--active {
  background: rgba(57, 255, 20, 0.14);
  border-color: var(--green);
  box-shadow: inset 0 0 0 1px var(--green), 0 0 12px var(--green-soft);
}

.stage-btn__num {
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--ink-faint);
  text-transform: uppercase;
}

.stage-btn--active .stage-btn__num {
  color: var(--green);
  text-shadow: 0 0 6px var(--green-soft);
}

.stage-btn__name {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.3;
}

/* Intro / rules — terminal output style, no heavy panel */
.intro-card {
  border: none;
  background: transparent;
  padding: 4px 14px 4px 18px;
  border-left: 2px solid var(--green);
  box-shadow: -8px 0 16px -8px var(--green-soft);
}

.intro-card h2 {
  margin: 0 0 8px;
  font-size: 16px;
  letter-spacing: 0.16em;
  display: flex;
  align-items: center;
  gap: 8px;
}

.intro-card h2::before {
  content: ">_";
  font-size: 13px;
  color: var(--green);
  letter-spacing: 0;
}

/* Ad slot */
.ad-slot {
  border: 1px dashed rgba(57, 255, 20, 0.3);
  padding: 12px var(--pad);
  text-align: center;
}

.ad-label {
  margin: 0 0 8px;
  font-size: 11px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--green-dim);
}

.ad-box {
  min-height: 90px;
  display: grid;
  place-items: center;
  color: var(--ink-faint);
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.ad-box:empty::before {
  content: "— SIGNAL IDLE —";
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--panel-edge);
  padding: 18px var(--pad) 6px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 14px;
  color: var(--ink-dim);
}

.site-footer p {
  margin: 0 0 4px;
}

.site-footer p:first-child {
  color: var(--ink);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-size: 14px;
}

.site-footer p:first-child::before {
  content: "▌ ";
  color: var(--green);
}

.footer-meta {
  font-size: 14px;
}

.footer-links {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.footer-links a {
  color: var(--ink-dim);
  border-bottom: none;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--green);
}

/* Subpage info-card */
.info-card {
  border: 1px solid var(--panel-edge);
  background: var(--panel);
  padding: var(--pad);
}

.info-card h1.title {
  margin: 0 0 10px;
  font-size: clamp(26px, 4.5vw, 36px);
  letter-spacing: 0.1em;
}

.info-card h2 {
  margin: 0 0 10px;
  font-size: 16px;
  letter-spacing: 0.16em;
  display: flex;
  align-items: center;
  gap: 8px;
}

.info-card h2::before {
  content: "■";
  font-size: 9px;
  color: var(--green);
}

.info-card h3 {
  margin: 22px 0 8px;
  font-size: 14px;
  letter-spacing: 0.1em;
  color: var(--green);
  text-shadow: 0 0 6px var(--green-soft);
  text-transform: none;
  font-weight: 700;
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.info-card h3::before {
  content: ">";
  color: var(--green-dim);
  font-weight: 400;
}

.info-card h3:first-of-type {
  margin-top: 14px;
}

.info-card p {
  margin: 0 0 8px;
  line-height: 1.65;
}

.info-card ul {
  margin: 0 0 10px;
  padding-left: 22px;
  list-style: none;
}

.info-card li {
  position: relative;
  margin-bottom: 4px;
  line-height: 1.65;
}

.info-card li::before {
  content: "·";
  position: absolute;
  left: -14px;
  color: var(--green);
  font-weight: 700;
}

.info-card a {
  word-break: break-all;
}

/* Responsive */
@media (max-width: 720px) {
  .app {
    width: calc(100vw - 16px);
    padding-top: 14px;
  }

  .controls-bar {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
  }

  .controls-bar button {
    padding: 10px 6px;
    font-size: 13px;
  }

  .brand-row {
    align-items: flex-start;
  }

  .site-nav {
    gap: 12px;
  }

  .site-nav a {
    font-size: 13px;
  }

  .site-footer {
    flex-direction: column;
    align-items: flex-start;
  }

  .mobile-controls {
    display: flex;
  }
}

@media (prefers-reduced-motion: reduce) {
  body::before {
    background: none;
  }
}