:root {
  color-scheme: dark;
  --mv-bg: #071018;
  --mv-ink: #f8fbff;
  --mv-muted: #a8b7c7;
  --mv-line: rgba(255, 255, 255, 0.14);
  --mv-panel: rgba(10, 18, 28, 0.84);
  --mv-panel-strong: rgba(14, 27, 42, 0.94);
  --mv-accent: #2de2c8;
  --mv-secondary: #ffd166;
  --mv-danger: #ff6b6b;
  --mv-shadow: rgba(0, 0, 0, 0.34);
  --mv-radius: 8px;
  font-family: "Avenir Next", "Gill Sans", "Trebuchet MS", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(135deg, rgba(45, 226, 200, 0.09), transparent 28rem),
    radial-gradient(circle at 78% 12%, rgba(255, 209, 102, 0.1), transparent 22rem),
    var(--mv-bg);
  color: var(--mv-ink);
}

a {
  color: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

:where(a, button):focus-visible {
  outline: 2px solid var(--mv-accent);
  outline-offset: 4px;
}

.mv-topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 4rem;
  padding: 0.8rem clamp(1rem, 4vw, 2rem);
  border-bottom: 1px solid var(--mv-line);
  background: rgba(5, 12, 20, 0.78);
  backdrop-filter: blur(18px);
}

.mv-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--mv-ink);
  font-size: 1.15rem;
  font-weight: 900;
  text-decoration: none;
}

.mv-brand-mark {
  display: inline-grid;
  width: 2rem;
  height: 2rem;
  place-items: center;
  border: 1px solid color-mix(in srgb, var(--mv-accent), white 28%);
  border-radius: 50%;
  color: #06121b;
  background: var(--mv-accent);
  box-shadow: 0 0 0 6px color-mix(in srgb, var(--mv-accent), transparent 84%);
}

.mv-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.35rem;
}

.mv-nav a {
  min-height: 2.45rem;
  padding: 0.62rem 0.75rem;
  border: 1px solid transparent;
  border-radius: var(--mv-radius);
  color: var(--mv-muted);
  text-decoration: none;
}

.mv-nav a:hover {
  border-color: var(--mv-line);
  color: var(--mv-ink);
  background: rgba(255, 255, 255, 0.06);
}

.mv-home main {
  width: min(116rem, calc(100% - 2rem));
  margin: 0 auto;
}

.mv-hero {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(22rem, 1.1fr);
  gap: clamp(1rem, 4vw, 2.4rem);
  align-items: end;
  min-height: min(44rem, calc(100vh - 4rem));
  padding: clamp(2rem, 7vh, 5rem) 0 1.5rem;
}

.mv-kicker {
  margin: 0 0 0.85rem;
  color: var(--mv-accent);
  font-size: 0.83rem;
  font-weight: 900;
  text-transform: uppercase;
}

.mv-hero h1 {
  max-width: 11ch;
  margin: 0;
  font-size: clamp(3.2rem, 8.6vw, 6.9rem);
  line-height: 0.86;
  letter-spacing: 0;
}

.mv-hero p {
  max-width: 40rem;
  margin: 1.2rem 0 0;
  color: var(--mv-muted);
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  line-height: 1.55;
}

.mv-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.4rem;
}

.mv-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.85rem;
  padding: 0.75rem 1rem;
  border: 1px solid color-mix(in srgb, var(--mv-accent), white 24%);
  border-radius: var(--mv-radius);
  background: var(--mv-accent);
  color: #06121b;
  font-weight: 900;
  text-decoration: none;
  cursor: pointer;
}

.mv-button:hover {
  filter: brightness(1.08);
}

.mv-button.secondary {
  border-color: var(--mv-line);
  background: rgba(255, 255, 255, 0.07);
  color: var(--mv-ink);
}

.mv-orbit-board {
  position: relative;
  min-height: 31rem;
  border: 1px solid var(--mv-line);
  border-radius: var(--mv-radius);
  overflow: hidden;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.09), transparent),
    rgba(10, 18, 28, 0.7);
  box-shadow: 0 2rem 5rem var(--mv-shadow);
}

.mv-orbit-board canvas {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 31rem;
}

.mv-orbit-caption {
  position: absolute;
  inset: auto 1rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.8rem;
  border: 1px solid var(--mv-line);
  border-radius: var(--mv-radius);
  background: rgba(4, 10, 16, 0.76);
  backdrop-filter: blur(12px);
}

.mv-orbit-caption strong {
  display: block;
}

.mv-orbit-caption span {
  color: var(--mv-muted);
  font-size: 0.88rem;
}

.mv-section {
  padding: 1rem 0 clamp(2rem, 7vh, 4rem);
}

.mv-section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.mv-section-head h2 {
  margin: 0;
  font-size: clamp(2rem, 5vw, 4.2rem);
  line-height: 0.95;
  letter-spacing: 0;
}

.mv-section-head p {
  max-width: 35rem;
  margin: 0;
  color: var(--mv-muted);
  line-height: 1.55;
}

.mv-game-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.9rem;
}

.mv-game-card {
  display: grid;
  grid-template-rows: auto 1fr auto;
  min-height: 24rem;
  border: 1px solid var(--mv-line);
  border-radius: var(--mv-radius);
  overflow: hidden;
  background: var(--mv-panel);
  color: var(--mv-ink);
  text-decoration: none;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.mv-game-card:hover {
  transform: translateY(-3px);
  border-color: color-mix(in srgb, var(--game-accent, var(--mv-accent)), white 16%);
  background: var(--mv-panel-strong);
}

.mv-card-preview {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  background: #08111f;
}

.mv-card-body {
  padding: 1rem;
}

.mv-card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 0.8rem;
}

.mv-pill {
  padding: 0.34rem 0.55rem;
  border: 1px solid var(--mv-line);
  border-radius: 999px;
  color: var(--mv-muted);
  font-size: 0.76rem;
  font-weight: 800;
}

.mv-game-card h3 {
  margin: 0;
  color: var(--game-accent, var(--mv-accent));
  font-size: 1.55rem;
  line-height: 1.05;
  letter-spacing: 0;
}

.mv-game-card p {
  margin: 0.75rem 0 0;
  color: var(--mv-muted);
  line-height: 1.5;
}

.mv-card-action {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 1rem;
  border-top: 1px solid var(--mv-line);
  color: var(--game-accent, var(--mv-accent));
  font-weight: 900;
}

.mv-note-band {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1rem;
  align-items: center;
  margin: 1rem 0 3rem;
  padding: 1rem;
  border: 1px solid var(--mv-line);
  border-radius: var(--mv-radius);
  background: rgba(255, 255, 255, 0.055);
}

.mv-note-band p {
  margin: 0;
  color: var(--mv-muted);
  line-height: 1.5;
}

.mv-footer {
  padding: 2rem 1rem;
  border-top: 1px solid var(--mv-line);
  color: var(--mv-muted);
  text-align: center;
}

.mv-game .mv-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(18rem, 0.34fr);
  gap: 1rem;
  width: min(94rem, calc(100% - 2rem));
  min-height: calc(100vh - 4rem);
  margin: 0 auto;
  padding: 1rem 0 1.25rem;
}

.mv-game[data-game="signal-trace"] .mv-shell {
  align-items: start;
}

.mv-game[data-game="signal-trace"] .mv-stage-card {
  width: 100%;
  height: calc(100vh - 6rem);
  max-height: 64rem;
}

.mv-stage-card,
.mv-panel {
  border: 1px solid var(--mv-line);
  border-radius: var(--mv-radius);
  background: var(--mv-panel);
  box-shadow: 0 1.5rem 4.5rem var(--mv-shadow);
}

.mv-stage-card {
  position: relative;
  min-height: 38rem;
  overflow: hidden;
}

#game-canvas {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 38rem;
  background: #07101d;
  touch-action: none;
}

.mv-hud {
  position: absolute;
  inset: 1rem 1rem auto;
  z-index: 4;
  display: grid;
  grid-template-columns: repeat(4, minmax(4.8rem, auto));
  gap: 0.55rem;
  pointer-events: none;
}

.mv-hud span {
  min-height: 3.35rem;
  padding: 0.55rem 0.75rem;
  border: 1px solid var(--mv-line);
  border-radius: var(--mv-radius);
  background: rgba(0, 0, 0, 0.38);
  color: var(--mv-muted);
  font-size: 0.78rem;
}

.mv-hud b {
  display: block;
  margin-top: 0.1rem;
  color: var(--mv-ink);
  font-size: 1.1rem;
  line-height: 1;
}

.mv-camera {
  position: absolute;
  right: 1rem;
  bottom: 1rem;
  z-index: 5;
  width: min(11rem, 26vw);
  aspect-ratio: 4 / 3;
  border: 1px solid var(--mv-line);
  border-radius: var(--mv-radius);
  object-fit: cover;
  transform: scaleX(-1);
  opacity: 0.72;
  background: #000;
}

.mv-camera:empty {
  display: none;
}

.mv-permission {
  position: absolute;
  inset: 0;
  z-index: 6;
  display: grid;
  place-items: center;
  padding: 1rem;
  background: rgba(2, 7, 12, 0.78);
}

.mv-permission-card {
  width: min(34rem, 100%);
  padding: clamp(1rem, 4vw, 1.5rem);
  border: 1px solid var(--mv-line);
  border-radius: var(--mv-radius);
  background: rgba(6, 15, 24, 0.96);
  text-align: center;
}

.mv-permission-card h1 {
  margin: 0;
  color: var(--mv-accent);
  font-size: clamp(2.4rem, 9vw, 5rem);
  line-height: 0.9;
  letter-spacing: 0;
}

.mv-permission-card p,
.mv-panel p,
.mv-panel li {
  color: var(--mv-muted);
  line-height: 1.6;
}

.mv-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  justify-content: center;
  margin-top: 1rem;
}

.mv-panel {
  padding: 1rem;
}

.mv-panel h1,
.mv-panel h2 {
  margin: 0 0 0.75rem;
  letter-spacing: 0;
}

.mv-panel h1 {
  color: var(--mv-accent);
  font-size: 1.75rem;
  line-height: 1.05;
}

.mv-panel h2 {
  margin-top: 1.2rem;
  font-size: 1rem;
}

.mv-panel ul {
  margin: 0.75rem 0 0;
  padding-left: 1.1rem;
}

.mv-status {
  min-height: 3rem;
  margin-top: 1rem;
  padding: 0.75rem;
  border: 1px solid var(--mv-line);
  border-radius: var(--mv-radius);
  color: var(--mv-muted);
  background: rgba(0, 0, 0, 0.24);
}

.mv-trace-lessons {
  margin-top: 20px;
  padding: 16px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 18px;
  background: rgba(34, 211, 238, 0.06);
}

.mv-trace-lessons h2 {
  margin-top: 0;
}

.mv-trace-levels {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.mv-trace-level {
  min-height: 54px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 14px;
  color: var(--mv-muted);
  background: rgba(255, 255, 255, 0.04);
  font: inherit;
  font-weight: 900;
  cursor: pointer;
}

.mv-trace-level span {
  display: block;
  margin-top: 3px;
  font-size: 0.7rem;
}

.mv-trace-level:hover,
.mv-trace-level:focus-visible,
.mv-trace-level.is-active {
  color: #071018;
  border-color: var(--mv-accent);
  background: var(--mv-accent);
  outline: none;
}

.mv-trace-level:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.mv-trace-level:disabled:hover {
  color: var(--mv-muted);
  border-color: rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.04);
}

.mv-trace-progress {
  margin: 14px 0 4px;
  color: var(--mv-text) !important;
  font-weight: 900;
}

.mv-trace-word-board {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 10px 0;
}

.mv-trace-word-board[hidden] {
  display: none;
}

.mv-trace-word-board span {
  display: grid;
  width: 32px;
  height: 36px;
  place-items: center;
  border: 2px solid rgba(255, 255, 255, 0.14);
  border-radius: 10px;
  color: var(--mv-muted);
  background: rgba(0, 0, 0, 0.24);
  font-weight: 950;
  transition: transform 160ms ease, color 160ms ease, border-color 160ms ease, background 160ms ease;
}

.mv-trace-word-board span.is-current {
  color: #071018;
  border-color: var(--mv-secondary);
  background: var(--mv-secondary);
  box-shadow: 0 0 16px color-mix(in srgb, var(--mv-secondary) 50%, transparent);
  transform: translateY(-2px) rotate(-2deg);
}

.mv-trace-word-board span.is-done {
  color: #071018;
  border-color: #45f2a1;
  background: #45f2a1;
}

.mv-trace-help {
  margin: 0;
  font-size: 0.84rem;
}

.mv-trace-rewards {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 10px 0;
}

.mv-trace-rewards span {
  padding: 6px 9px;
  border: 1px solid rgba(251, 191, 36, 0.3);
  border-radius: 999px;
  color: #fde68a;
  background: rgba(251, 191, 36, 0.08);
  font-size: 0.76rem;
  font-weight: 900;
}

.mv-trace-custom {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.mv-trace-custom label {
  display: block;
  margin-bottom: 7px;
  color: var(--mv-ink);
  font-size: 0.85rem;
  font-weight: 900;
}

.mv-trace-custom > div {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 7px;
}

.mv-trace-custom input,
.mv-trace-custom button {
  min-height: 42px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 12px;
  font: inherit;
}

.mv-trace-custom .mv-trace-quick {
  display: flex;
  grid-template-columns: none;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin-top: 9px;
}

.mv-trace-quick span {
  color: var(--mv-muted);
  font-size: 0.75rem;
  font-weight: 900;
}

.mv-trace-custom .mv-trace-quick button {
  min-height: 30px;
  padding: 0 9px;
  border-color: rgba(251, 191, 36, 0.28);
  border-radius: 999px;
  color: #fde68a;
  background: rgba(251, 191, 36, 0.08);
  font-size: 0.72rem;
}

.mv-trace-custom .mv-trace-quick button:hover {
  color: #071018;
  background: #fbbf24;
}

.mv-trace-custom input {
  min-width: 0;
  padding: 0 11px;
  color: var(--mv-ink);
  background: rgba(0, 0, 0, 0.28);
  text-transform: uppercase;
}

.mv-trace-custom button {
  padding: 0 12px;
  color: #071018;
  background: var(--mv-secondary);
  font-weight: 900;
  cursor: pointer;
}

.mv-trace-custom input:focus-visible,
.mv-trace-custom button:focus-visible {
  border-color: var(--mv-secondary);
  outline: 2px solid var(--mv-secondary);
  outline-offset: 2px;
}

.mv-trace-custom small {
  display: block;
  margin-top: 7px;
  color: var(--mv-muted);
  line-height: 1.4;
}

.mv-trace-custom .mv-trace-count {
  margin-top: 2px;
  color: color-mix(in srgb, var(--mv-accent) 75%, white);
  font-size: 0.7rem;
  font-weight: 800;
}

.mv-trace-custom.has-error small {
  color: #fda4af;
}

.mv-game-links {
  display: grid;
  gap: 0.5rem;
  margin-top: 1rem;
}

.mv-game-links a {
  padding: 0.68rem 0.75rem;
  border: 1px solid var(--mv-line);
  border-radius: var(--mv-radius);
  color: var(--mv-muted);
  text-decoration: none;
}

.mv-game-links a:hover {
  color: var(--mv-ink);
  background: rgba(255, 255, 255, 0.06);
}

.mv-retired {
  display: grid;
  min-height: calc(100vh - 4rem);
  place-items: center;
  padding: 1rem;
}

.mv-retired-panel {
  width: min(36rem, 100%);
  padding: 1.2rem;
  border: 1px solid var(--mv-line);
  border-radius: var(--mv-radius);
  background: var(--mv-panel);
}

.mv-retired-panel h1 {
  margin: 0 0 0.8rem;
  color: var(--mv-accent);
  font-size: clamp(2.2rem, 8vw, 4.4rem);
  line-height: 0.92;
}

.mv-retired-panel p {
  color: var(--mv-muted);
  line-height: 1.6;
}

@media (max-width: 1100px) {
  .mv-game-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .mv-hero {
    grid-template-columns: 1fr;
    min-height: auto;
  }
}

@media (max-width: 860px) {
  .mv-note-band {
    grid-template-columns: 1fr;
  }

  .mv-section-head {
    flex-direction: column;
    align-items: flex-start;
  }

  .mv-game .mv-shell {
    grid-template-columns: 1fr;
  }

  .mv-panel {
    order: -1;
  }

  .mv-game[data-game="signal-trace"] .mv-panel {
    order: initial;
  }

  .mv-game[data-game="signal-trace"] .mv-stage-card {
    height: min(34rem, 78vh);
  }

  .mv-stage-card,
  #game-canvas {
    min-height: min(34rem, 78vh);
  }
}

@media (max-width: 720px) {
  .mv-topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .mv-nav {
    justify-content: flex-start;
  }

  .mv-game-grid {
    grid-template-columns: 1fr;
  }

  .mv-hud {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .mv-camera {
    width: 7rem;
  }
}

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