:root {
  --bg: #08080f;
  --bg-deep: #03040a;
  --panel: rgba(13, 15, 31, 0.86);
  --panel-strong: rgba(15, 15, 26, 0.96);
  --line: rgba(255, 255, 255, 0.17);
  --text: #f7fbff;
  --muted: #9eadc3;
  --cyan: #00f5ff;
  --magenta: #ff006e;
  --yellow: #ffe600;
  --green: #00ff88;
  --orange: #ff9f1c;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.54);
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  min-height: 100%;
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 16% 18%, rgba(0, 245, 255, 0.2), transparent 27%),
    radial-gradient(circle at 86% 22%, rgba(255, 0, 110, 0.22), transparent 28%),
    linear-gradient(145deg, #08080f 0%, #101529 48%, #04050b 100%);
  font-family: Inter, system-ui, sans-serif;
  overflow-x: hidden;
  touch-action: manipulation;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(to bottom, transparent, black 14%, black 88%, transparent);
}

.back-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 80;
  color: var(--text);
  text-decoration: none;
  font-family: "Press Start 2P", monospace;
  font-size: 0.62rem;
  line-height: 1.4;
  padding: 10px 12px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 999px;
  background: rgba(3, 4, 10, 0.78);
  box-shadow: 0 0 22px rgba(0, 245, 255, 0.16);
}

.shell {
  width: min(1240px, calc(100vw - 24px));
  min-height: 100dvh;
  margin: 0 auto;
  padding: 58px 0 18px;
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 12px;
}

.topbar {
  display: grid;
  grid-template-columns: minmax(230px, 1fr) minmax(320px, 650px);
  gap: 14px;
  align-items: end;
}

.eyebrow,
.panel-title {
  margin: 0 0 7px;
  color: var(--yellow);
  font-family: "Press Start 2P", monospace;
  font-size: 0.62rem;
  line-height: 1.5;
  letter-spacing: 0;
}

h1,
h2 {
  margin: 0;
  font-family: "Press Start 2P", monospace;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1 {
  font-size: clamp(1.25rem, 3.2vw, 2.35rem);
  text-shadow: 0 0 18px rgba(0, 245, 255, 0.42), 0 0 34px rgba(255, 0, 110, 0.28);
}

h2 {
  font-size: clamp(1.35rem, 6vw, 2.35rem);
  line-height: 1.25;
}

.hud {
  display: grid;
  grid-template-columns: repeat(4, minmax(68px, 1fr));
  gap: 8px;
}

.hud-card,
.side-panel {
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.hud-card {
  border-radius: 8px;
  padding: 10px 8px;
  text-align: center;
}

.hud-card span,
.mini-stat span,
.best-row span,
.score-hero span {
  display: block;
  color: var(--muted);
  font-size: 0.65rem;
  font-weight: 900;
  letter-spacing: 0.08em;
}

.hud-card strong,
.mini-stat strong,
.best-row strong,
.score-hero strong {
  display: block;
  margin-top: 4px;
  color: var(--text);
  font-size: clamp(1rem, 2.2vw, 1.34rem);
  font-weight: 900;
}

.arena {
  min-height: 0;
  display: grid;
  grid-template-columns: minmax(175px, 230px) minmax(320px, 1fr) minmax(165px, 205px);
  gap: 12px;
  align-items: center;
}

.side-panel {
  border-radius: 8px;
  padding: 14px;
}

.target-canvas {
  width: 100%;
  aspect-ratio: 1;
  display: block;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.17);
  background:
    radial-gradient(circle at 50% 50%, rgba(0, 245, 255, 0.12), transparent 54%),
    rgba(255, 255, 255, 0.055);
}

.target-name {
  margin-top: 10px;
  color: var(--text);
  font-weight: 900;
  text-align: center;
  text-transform: uppercase;
}

.pulse-meter {
  height: 13px;
  margin-top: 12px;
  border-radius: 999px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.16);
}

.pulse-fill {
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--green), var(--yellow), var(--magenta));
  box-shadow: 0 0 20px rgba(255, 230, 0, 0.42);
  transition: width 80ms linear;
}

.trace-wrap {
  position: relative;
  width: min(100%, calc(100dvh - 150px));
  max-width: 720px;
  aspect-ratio: 1;
  margin: 0 auto;
}

#traceCanvas {
  width: 100%;
  height: 100%;
  display: block;
  border-radius: 8px;
  border: 2px solid rgba(255, 255, 255, 0.23);
  background:
    radial-gradient(circle at 50% 50%, rgba(255, 230, 0, 0.08), transparent 16%),
    radial-gradient(circle at 50% 50%, rgba(0, 245, 255, 0.16), transparent 54%),
    rgba(3, 4, 10, 0.78);
  box-shadow: var(--shadow), inset 0 0 50px rgba(0, 245, 255, 0.12);
  user-select: none;
  touch-action: none;
  cursor: crosshair;
}

.feedback {
  position: absolute;
  left: 50%;
  bottom: 16px;
  min-width: 210px;
  transform: translateX(-50%);
  padding: 10px 13px;
  border-radius: 999px;
  color: #031015;
  background: var(--cyan);
  box-shadow: 0 0 26px rgba(0, 245, 255, 0.34);
  font-weight: 900;
  text-align: center;
  pointer-events: none;
}

.feedback.bad {
  color: var(--text);
  background: var(--magenta);
  box-shadow: 0 0 26px rgba(255, 0, 110, 0.38);
}

.feedback.good {
  background: var(--green);
  box-shadow: 0 0 26px rgba(0, 255, 136, 0.38);
}

.mini-stat {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
  padding: 9px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.small-btn,
.primary-btn,
.secondary-btn {
  width: 100%;
  border: 0;
  border-radius: 8px;
  font-family: "Press Start 2P", monospace;
  letter-spacing: 0;
  cursor: pointer;
}

.small-btn {
  margin-top: 8px;
  padding: 11px 8px;
  color: #040611;
  background: linear-gradient(135deg, var(--cyan), var(--yellow));
  font-size: 0.62rem;
}

.small-btn-ghost,
.secondary-btn {
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.22);
}

.hint,
.modal-copy {
  color: var(--muted);
  font-weight: 800;
  line-height: 1.45;
}

.hint {
  margin: 13px 0 0;
  font-size: 0.8rem;
}

.overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  place-items: center;
  padding: 18px;
  background: radial-gradient(circle at 50% 24%, rgba(0, 245, 255, 0.22), rgba(3, 4, 10, 0.9));
  backdrop-filter: blur(7px);
}

.modal {
  width: min(540px, 100%);
  padding: 24px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  background: var(--panel-strong);
  box-shadow: var(--shadow);
  text-align: center;
}

.modal-copy {
  margin: 14px 0 16px;
}

.best-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 9px;
  margin: 14px 0;
}

.best-row.three {
  grid-template-columns: repeat(3, 1fr);
}

.best-row div,
.score-hero {
  padding: 12px 8px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.07);
}

.score-hero {
  margin: 15px 0 10px;
}

.score-hero strong {
  color: var(--yellow);
  font-size: clamp(2rem, 10vw, 3.6rem);
}

.primary-btn,
.secondary-btn {
  padding: 14px 12px;
  font-size: 0.72rem;
}

.primary-btn {
  color: #03040a;
  background: linear-gradient(135deg, var(--cyan), var(--yellow) 52%, var(--magenta));
  box-shadow: 0 0 24px rgba(0, 245, 255, 0.22);
}

.button-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 9px;
  margin-top: 12px;
}

.hidden {
  display: none !important;
}

@media (max-width: 940px) {
  .shell {
    width: min(100vw - 16px, 760px);
    padding-top: 54px;
  }

  .topbar,
  .arena {
    grid-template-columns: 1fr;
  }

  .title-block {
    text-align: center;
  }

  .side-panel {
    display: grid;
    grid-template-columns: auto minmax(120px, 1fr) auto;
    gap: 8px 12px;
    align-items: center;
    padding: 10px;
  }

  .side-panel .panel-title {
    margin: 0;
  }

  .target-canvas {
    width: 84px;
  }

  .target-name {
    margin: 0;
    text-align: left;
  }

  .pulse-meter {
    grid-column: 1 / -1;
    margin: 0;
  }

  .stats-panel {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .stats-panel .panel-title,
  .stats-panel .hint {
    grid-column: 1 / -1;
  }

  .mini-stat {
    display: block;
    margin: 0;
    padding: 5px 0;
    text-align: center;
  }

  .small-btn {
    margin: 0;
  }

  .trace-wrap {
    width: min(100%, calc(100dvh - 276px));
    min-width: 300px;
  }
}

@media (max-width: 560px) {
  .back-link {
    max-width: 150px;
    font-size: 0.52rem;
    padding: 8px 9px;
  }

  .shell {
    padding-top: 48px;
    gap: 8px;
  }

  .hud {
    grid-template-columns: repeat(4, 1fr);
    gap: 5px;
  }

  .hud-card {
    padding: 7px 4px;
  }

  .hud-card span {
    font-size: 0.51rem;
  }

  .hud-card strong {
    font-size: 0.84rem;
  }

  .side-panel {
    grid-template-columns: 72px 1fr;
  }

  .target-canvas {
    width: 72px;
    grid-row: span 2;
  }

  .stats-panel {
    grid-template-columns: repeat(2, 1fr);
  }

  .trace-wrap {
    width: min(100%, calc(100dvh - 344px));
    min-width: 286px;
  }

  .feedback {
    bottom: 10px;
    min-width: 180px;
    font-size: 0.82rem;
  }

  .modal {
    padding: 18px 14px;
  }

  .button-row,
  .best-row.three {
    grid-template-columns: 1fr;
  }
}

@media (max-height: 700px) and (orientation: landscape) {
  .shell {
    width: min(100vw - 16px, 1120px);
    padding-top: 45px;
  }

  .topbar {
    grid-template-columns: 0.7fr 1fr;
  }

  h1 {
    font-size: 1rem;
  }

  .arena {
    grid-template-columns: minmax(150px, 200px) minmax(300px, 1fr) minmax(150px, 190px);
  }

  .side-panel,
  .stats-panel {
    display: block;
  }

  .target-canvas {
    width: 100%;
  }

  .target-name {
    margin-top: 10px;
    text-align: center;
  }

  .trace-wrap {
    width: min(calc(100dvh - 128px), 56vw);
  }
}