:root {
  --bg-deep: #070b16;
  --bg-navy: #0c1428;
  --bg-panel: #101a32;
  --border: #1e2f55;
  --cyan: #3de7ff;
  --cyan-dim: #1a8fa3;
  --magenta: #ff4fd8;
  --gold: #ffd166;
  --red: #ff4d6d;
  --green: #5dff9a;
  --purple: #b794ff;
  --text: #e8f1ff;
  --muted: #8aa0c4;
  --danger: #ff3b5c;
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.45);
  --radius: 14px;
  --font-display: "Orbitron", system-ui, sans-serif;
  --font-ui: "Rajdhani", system-ui, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(1200px 600px at 50% -10%, #14305a 0%, transparent 55%),
    radial-gradient(800px 500px at 100% 100%, #1a1040 0%, transparent 50%),
    var(--bg-deep);
  color: var(--text);
  font-family: var(--font-ui);
  font-size: 16px;
  overflow-x: hidden;
}

body.shake {
  animation: screen-shake 0.35s ease-in-out;
}
@keyframes screen-shake {
  0%, 100% { transform: translate(0, 0); }
  20% { transform: translate(-4px, 2px); }
  40% { transform: translate(5px, -3px); }
  60% { transform: translate(-3px, -2px); }
  80% { transform: translate(3px, 1px); }
}

#app {
  max-width: 1100px;
  margin: 0 auto;
  padding: 16px 18px 28px;
}

.top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
  padding: 10px 14px;
  background: linear-gradient(180deg, rgba(22, 36, 70, 0.9), rgba(12, 20, 40, 0.75));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
}
.brand-mark {
  color: var(--cyan);
  font-size: 1.4rem;
  text-shadow: 0 0 16px rgba(61, 231, 255, 0.7);
}
.brand h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 900;
  letter-spacing: 0.06em;
  background: linear-gradient(90deg, var(--cyan), #8af7ff, var(--magenta));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.brand-sub {
  color: var(--muted);
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.top-actions { display: flex; gap: 8px; flex-wrap: wrap; }

.btn {
  font-family: var(--font-ui);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  border-radius: 999px;
  border: 1px solid transparent;
  padding: 8px 16px;
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.12s ease, background 0.12s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn-ghost {
  background: rgba(30, 47, 85, 0.55);
  border-color: var(--border);
  color: var(--text);
}
.btn-ghost:hover { border-color: var(--cyan-dim); box-shadow: 0 0 16px rgba(61, 231, 255, 0.2); }
.btn-ghost.active {
  background: rgba(61, 231, 255, 0.15);
  border-color: var(--cyan);
  color: var(--cyan);
  box-shadow: 0 0 18px rgba(61, 231, 255, 0.25);
}
.btn-primary {
  background: linear-gradient(135deg, #1ec8e0, #3de7ff);
  color: #041018;
  box-shadow: 0 0 20px rgba(61, 231, 255, 0.35);
}
.btn-primary:hover { box-shadow: 0 0 28px rgba(61, 231, 255, 0.5); }

.stage {
  display: grid;
  grid-template-columns: 200px minmax(280px, 320px) 200px;
  gap: 16px;
  justify-content: center;
  align-items: start;
}

.panel { display: flex; flex-direction: column; gap: 12px; }

.card {
  background: linear-gradient(165deg, rgba(22, 34, 64, 0.95), rgba(12, 18, 36, 0.92));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px;
  box-shadow: var(--shadow);
}
.card h2 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
  opacity: 0.9;
}

.stats-card .stat {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 4px 0;
  border-bottom: 1px solid rgba(30, 47, 85, 0.55);
  font-size: 1.05rem;
}
.stats-card .stat:last-child { border-bottom: none; }
.stats-card .stat span { color: var(--muted); }
.stats-card .stat strong {
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--text);
}

.effects-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 220px;
  overflow-y: auto;
}
.effects-list .empty {
  color: var(--muted);
  font-size: 0.9rem;
  padding: 4px 0;
}
.effect-chip {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 8px;
  align-items: center;
  padding: 6px 8px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: rgba(8, 14, 28, 0.55);
  font-size: 0.88rem;
}
.effect-chip.buff { border-color: rgba(93, 255, 154, 0.35); box-shadow: inset 0 0 12px rgba(93, 255, 154, 0.08); }
.effect-chip.debuff { border-color: rgba(255, 77, 109, 0.4); box-shadow: inset 0 0 12px rgba(255, 77, 109, 0.1); }
.effect-chip .emoji { font-size: 1.15rem; }
.effect-chip .meta { display: flex; flex-direction: column; line-height: 1.2; }
.effect-chip .meta strong { font-weight: 700; }
.effect-chip .meta small { color: var(--muted); font-size: 0.75rem; }
.effect-chip .timer {
  font-family: var(--font-display);
  font-size: 0.7rem;
  color: var(--gold);
}

.board-wrap {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.board-frame {
  position: relative;
  width: 300px;
  height: 600px;
  border-radius: 12px;
  border: 2px solid rgba(61, 231, 255, 0.35);
  box-shadow:
    0 0 0 1px rgba(30, 47, 85, 0.9),
    0 0 40px rgba(61, 231, 255, 0.15),
    inset 0 0 60px rgba(0, 0, 0, 0.45);
  background: #050a14;
  overflow: hidden;
}
.board-frame.vignette-red::after {
  content: "";
  pointer-events: none;
  position: absolute;
  inset: 0;
  box-shadow: inset 0 0 80px rgba(255, 40, 70, 0.55);
  animation: pulse-red 0.6s ease-in-out infinite alternate;
  z-index: 3;
}
.board-frame.vignette-purple::after {
  content: "";
  pointer-events: none;
  position: absolute;
  inset: 0;
  box-shadow: inset 0 0 90px rgba(160, 80, 255, 0.55);
  animation: pulse-purple 0.8s ease-in-out infinite alternate;
  z-index: 3;
}
.board-frame.vignette-green::after {
  content: "";
  pointer-events: none;
  position: absolute;
  inset: 0;
  box-shadow: inset 0 0 70px rgba(80, 255, 120, 0.4);
  animation: pulse-green 1s ease-in-out infinite alternate;
  z-index: 3;
}
.board-frame.vignette-dark::after {
  content: "";
  pointer-events: none;
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.35);
  box-shadow: inset 0 0 100px rgba(0, 0, 0, 0.7);
  animation: flash-dark 0.5s ease-in-out infinite alternate;
  z-index: 3;
}
@keyframes pulse-red { from { opacity: 0.55; } to { opacity: 1; } }
@keyframes pulse-purple { from { opacity: 0.5; } to { opacity: 1; } }
@keyframes pulse-green { from { opacity: 0.45; } to { opacity: 0.9; } }
@keyframes flash-dark { from { opacity: 0.4; } to { opacity: 0.85; } }

#game-canvas, #fx-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}
#fx-canvas { pointer-events: none; z-index: 2; }

.overlay-message {
  position: absolute;
  inset: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 24px;
  background: rgba(4, 8, 18, 0.72);
  backdrop-filter: blur(4px);
  font-family: var(--font-display);
  font-size: 1.35rem;
  letter-spacing: 0.08em;
  color: var(--cyan);
  text-shadow: 0 0 20px rgba(61, 231, 255, 0.5);
}
.overlay-message.hidden { display: none; }
.overlay-message small {
  display: block;
  margin-top: 10px;
  font-family: var(--font-ui);
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  color: var(--muted);
  text-shadow: none;
  font-weight: 600;
}

.toast-stack {
  position: absolute;
  left: 50%;
  bottom: -8px;
  transform: translate(-50%, 100%);
  width: min(300px, 90vw);
  display: flex;
  flex-direction: column;
  gap: 6px;
  z-index: 20;
  pointer-events: none;
}
.toast {
  padding: 8px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: rgba(12, 20, 40, 0.92);
  box-shadow: var(--shadow);
  font-weight: 600;
  animation: toast-in 0.25s ease-out;
}
.toast.buff { border-color: rgba(93, 255, 154, 0.45); color: var(--green); }
.toast.debuff { border-color: rgba(255, 77, 109, 0.5); color: var(--red); }
.toast.info { color: var(--cyan); }
@keyframes toast-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.tips-card p {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.35;
}
.tips-card em { color: var(--gold); font-style: normal; font-weight: 700; }
.kbd-row { font-size: 0.85rem !important; }
kbd {
  display: inline-block;
  padding: 1px 6px;
  border-radius: 5px;
  border: 1px solid var(--border);
  background: rgba(30, 47, 85, 0.7);
  color: var(--text);
  font-family: var(--font-ui);
  font-size: 0.8rem;
  font-weight: 700;
}

#hold-canvas, #next-canvas {
  display: block;
  width: 100%;
  background: rgba(5, 10, 20, 0.55);
  border-radius: 8px;
  border: 1px solid rgba(30, 47, 85, 0.7);
}

.modal.hidden { display: none; }
.modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(2, 6, 14, 0.75);
  backdrop-filter: blur(6px);
}
.modal-panel {
  position: relative;
  width: min(640px, 100%);
  max-height: min(86vh, 760px);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  background: linear-gradient(165deg, #152448, #0c1428);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.55);
}
.modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
}
.modal-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1rem;
  letter-spacing: 0.08em;
}
.modal-body {
  padding: 16px 18px 22px;
  overflow-y: auto;
  font-size: 0.98rem;
  line-height: 1.45;
}
.modal-body h3 {
  margin: 16px 0 8px;
  font-family: var(--font-display);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cyan);
}
.modal-body h3:first-child { margin-top: 0; }
.modal-body ul { margin: 0; padding-left: 1.1rem; color: var(--muted); }
.modal-body li { margin-bottom: 4px; }
.help-grid {
  display: grid;
  gap: 8px;
}
.help-item {
  display: grid;
  grid-template-columns: 2rem 1fr;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: rgba(8, 14, 28, 0.5);
}
.help-item .emoji { font-size: 1.4rem; line-height: 1; }
.help-item strong { display: block; color: var(--text); }
.help-item span { color: var(--muted); font-size: 0.9rem; }
.help-item.buff { border-color: rgba(93, 255, 154, 0.3); }
.help-item.debuff { border-color: rgba(255, 77, 109, 0.35); }

@media (max-width: 860px) {
  .stage {
    grid-template-columns: 1fr;
    justify-items: center;
  }
  .panel { width: min(320px, 100%); }
  .panel-left { order: 2; }
  .board-wrap { order: 1; }
  .panel-right { order: 3; }
}

.overlay-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  max-width: 280px;
}
.overlay-title {
  font-size: 1.45rem;
  letter-spacing: 0.1em;
}
.overlay-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-top: 16px;
  pointer-events: auto;
}
.overlay-message .btn-play {
  font-family: var(--font-display);
  font-size: 1.05rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 12px 28px;
  min-width: 140px;
  pointer-events: auto;
}
.overlay-message .btn {
  pointer-events: auto;
  text-shadow: none;
  letter-spacing: 0.06em;
}

.site-footer {
  margin-top: 18px;
  text-align: center;
  font-size: 0.9rem;
  color: var(--muted);
}
.site-footer a {
  color: var(--cyan-dim);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}
.site-footer a:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}