@import url("https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=Righteous&display=swap");

:root {
  color-scheme: dark;
  --bg: #05040a;
  --bg-2: #0a0b1a;
  --bg-3: #11152a;
  --accent: #00f5ff;
  --accent-yellow: #ffd400;
  --accent-pink: #ff2bd6;
  --accent-2: var(--accent-pink);
  --accent-3: #00ff85;
  --accent-4: #ffd166;
  --brand-orange: #ff7a18;
  --brand-orange-glow: rgba(255, 122, 24, 0.55);
  --text: #f4f7ff;
  --muted: #8d98c6;
  --panel: rgba(7, 10, 24, 0.9);
  --panel-border: rgba(0, 245, 255, 0.3);
  --shadow: 0 30px 60px rgba(7, 9, 18, 0.6);
  --neon-shadow: 0 0 18px rgba(0, 245, 255, 0.3), 0 0 38px rgba(255, 43, 214, 0.2);
  --panel-gap: 6px;
  --side-width: 220px;
  --playfield-panel-h: clamp(560px, 75vh, 860px);
  --side-h: calc(var(--playfield-panel-h) * 0.75);
  --preview-size: clamp(110px, 14vh, 140px);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: url("./assets/background_img.png") center/cover no-repeat fixed;
  font-family: "Space Grotesk", "Segoe UI", sans-serif;
  color: var(--text);
  position: relative;
  overflow: hidden;
}

.bg-overlay {
  position: fixed;
  inset: 0;
  background: radial-gradient(
    ellipse at center,
    rgba(0, 0, 0, 0.00) 0%,
    rgba(0, 0, 0, 0.10) 70%,
    rgba(0, 0, 0, 0.22) 100%
  );
  pointer-events: none;
  z-index: 0;
  opacity: 0.06;
}

.app {
  max-width: 1080px;
  margin: 0 auto;
  padding: 12px clamp(10px, 2vw, 20px) 20px;
  position: relative;
  z-index: 1;
}

.top {
  display: flex;
  gap: 18px;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.28em;
  font-size: 0.7rem;
  color: var(--accent);
  font-weight: 600;
  text-shadow: var(--neon-shadow);
}

h1 {
  font-family: "Righteous", "Space Grotesk", sans-serif;
  font-size: clamp(1.4rem, 3vw, 2.5rem);
  margin: 4px 0 8px;
  text-shadow: 0 0 24px rgba(0, 245, 255, 0.4);
}

.brand {
  color: var(--brand-orange);
  text-shadow:
    0 0 6px var(--brand-orange-glow),
    0 0 14px rgba(255, 160, 60, 0.35);
  letter-spacing: 0.34em;
}

.brand-logo {
  width: 18px;
  height: 18px;
  object-fit: contain;
  display: inline-block;
  margin-right: 8px;
  vertical-align: -2px;
  filter: drop-shadow(0 0 6px rgba(255, 122, 24, 0.45));
}

.cyber-title {
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(90deg, #a8fff7 0%, #49d7ff 35%, #ffd400 70%, #a8fff7 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow:
    0 0 6px rgba(73, 215, 255, 0.35),
    0 0 12px rgba(73, 215, 255, 0.22),
    0 0 14px rgba(255, 212, 0, 0.16),
    0 4px 12px rgba(0, 0, 0, 0.55);
  -webkit-text-stroke: 1px rgba(255, 255, 255, 0.12);
}

.sub {
  margin: 0;
  color: var(--muted);
  max-width: 420px;
  font-size: 0.9rem;
}

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

.btn {
  appearance: none;
  border: none;
  border-radius: 999px;
  padding: 12px 20px;
  font-weight: 600;
  letter-spacing: 0.02em;
  background: linear-gradient(135deg, var(--accent-yellow) 0%, var(--accent) 100%);
  color: #05060c;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 26px 50px rgba(255, 212, 0, 0.35);
}

.btn.ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid rgba(255, 43, 214, 0.4);
  box-shadow: none;
}

.btn.is-hidden {
  display: none;
}

.btn.play {
  background: linear-gradient(135deg, var(--accent-yellow) 0%, var(--accent) 100%);
}

.btn.run {
  background: linear-gradient(135deg, var(--accent-yellow) 0%, var(--accent) 100%);
}

.btn.pause {
  border: 1px solid rgba(255, 43, 214, 0.5);
  box-shadow: 0 0 16px rgba(255, 43, 214, 0.35);
  background: rgba(6, 12, 20, 0.6);
  backdrop-filter: blur(12px);
}

.sound-slider {
  width: 70px;
  accent-color: var(--accent-yellow);
}

.sound-panel {
  display: grid;
  gap: 6px;
  padding: 6px 8px;
  border-radius: 14px;
  background: rgba(6, 12, 20, 0.55);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(0, 245, 255, 0.2);
}

.sound-row {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 10px;
}

.sound-toggle {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  font-weight: 700;
  color: var(--muted);
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
}

.sound-toggle.is-on {
  color: var(--accent-yellow);
  text-shadow: 0 0 10px rgba(255, 212, 0, 0.4);
}

.stage {
  display: block;
}

.hud-row {
  display: flex;
  gap: var(--panel-gap);
  justify-content: center;
  align-items: flex-start;
  max-width: fit-content;
  margin: 0 auto;
}

.playfield {
  margin: 0;
}

.side-panel {
  width: var(--side-width);
  height: var(--side-h);
  display: flex;
  flex-direction: column;
  gap: 12px;
  overflow: hidden;
  padding: 12px;
}

.playfield-panel {
  height: var(--playfield-panel-h);
}

.playfield-panel .board-wrap {
  height: calc(var(--playfield-panel-h) * 0.72);
  display: flex;
  align-items: center;
  justify-content: center;
}

.playfield-panel .board {
  height: 100%;
}

.next-panel .panel-title {
  margin-bottom: 6px;
}

.next-panel .stack {
  gap: 6px;
}

.panel {
  background: rgba(6, 12, 20, 0.92);
  border: 1px solid var(--panel-border);
  border-radius: 20px;
  padding: 16px;
  box-shadow: var(--shadow), 0 0 24px rgba(0, 245, 255, 0.08);
  backdrop-filter: blur(8px);
}

.panel-title {
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.7rem;
  color: var(--accent-4);
  margin-bottom: 8px;
  text-shadow: var(--neon-shadow);
}

.playfield {
  display: grid;
  gap: 16px;
}

.board-wrap {
  position: relative;
  border-radius: 18px;
  padding: 4px;
  background: linear-gradient(140deg, rgba(0, 245, 255, 0.15), rgba(255, 43, 214, 0.1));
  box-shadow: 0 0 18px rgba(0, 245, 255, 0.22), 0 0 28px rgba(255, 43, 214, 0.18);
  animation: borderPulse 2.6s ease-in-out infinite;
}

.board-wrap::before {
  content: "";
  position: absolute;
  inset: -2px;
  border-radius: 20px;
  border: 1px solid rgba(0, 245, 255, 0.6);
  box-shadow: 0 0 18px rgba(0, 245, 255, 0.4), 0 0 28px rgba(255, 43, 214, 0.28);
  opacity: 0.9;
  pointer-events: none;
}

.board {
  width: 100%;
  border-radius: 16px;
  background: linear-gradient(180deg, #090c1f 0%, #070914 100%);
  border: 1px solid rgba(0, 245, 255, 0.35);
  box-shadow: inset 0 0 18px rgba(0, 245, 255, 0.2), 0 0 16px rgba(255, 43, 214, 0.1);
  animation: glow 6s ease-in-out infinite;
  image-rendering: pixelated;
}

.hud {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.hud-item {
  background: rgba(10, 14, 28, 0.9);
  border: 1px solid rgba(0, 245, 255, 0.2);
  border-radius: 14px;
  padding: 8px;
  box-shadow: inset 0 0 16px rgba(0, 245, 255, 0.08);
}

.label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--muted);
}

.value {
  font-size: 1.1rem;
  font-weight: 700;
  margin-top: 4px;
}

.stack {
  display: grid;
  gap: 10px;
}

.mini {
  width: var(--preview-size);
  height: var(--preview-size);
  border-radius: 16px;
  background: linear-gradient(140deg, #0b0f22 0%, #101428 100%);
  border: 1px solid rgba(0, 245, 255, 0.25);
  box-shadow: inset 0 0 20px rgba(0, 245, 255, 0.12);
}

.controls {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 6px;
  color: var(--muted);
}

.controls li {
  display: grid;
  grid-template-columns: 80px 1fr;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
}

.key {
  background: rgba(10, 14, 28, 0.9);
  border: 1px solid rgba(255, 43, 214, 0.3);
  border-radius: 8px;
  padding: 6px 10px;
  text-align: center;
  font-weight: 600;
  color: var(--text);
  text-shadow: 0 0 10px rgba(255, 43, 214, 0.35);
}

@media (max-width: 980px) {
  .hud-row {
    flex-direction: column;
    align-items: stretch;
  }

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

  .side-panel {
    width: 100%;
    height: auto;
  }

  .playfield-panel {
    height: auto;
  }

  .playfield-panel .board-wrap {
    height: auto;
  }

  .playfield-panel .board {
    height: auto;
  }
}

@keyframes glow {
  0% {
    box-shadow: inset 0 0 24px rgba(0, 245, 255, 0.2),
      0 0 16px rgba(255, 43, 214, 0.12);
  }
  100% {
    box-shadow: inset 0 0 36px rgba(0, 245, 255, 0.3),
      0 0 26px rgba(0, 255, 133, 0.2);
  }
}

@keyframes borderPulse {
  0% {
    box-shadow: 0 0 14px rgba(0, 245, 255, 0.22), 0 0 20px rgba(255, 43, 214, 0.18);
  }
  100% {
    box-shadow: 0 0 22px rgba(0, 245, 255, 0.36), 0 0 32px rgba(0, 255, 133, 0.24);
  }
}

@keyframes drift {
  0% {
    transform: translateY(0);
  }
  100% {
    transform: translateY(40px);
  }
}