:root {
  --bg: #12101c;
  --bg-2: #1a1630;
  --surface: #221c38;
  --surface-2: #2b2448;
  --fg: #f7f4ff;
  --muted: #c5b6d8;
  --pink: #ff7eb3;
  --pink-soft: #ffd6e8;
  --blue: #6ec8ff;
  --blue-soft: #b8e4ff;
  --lilac: #c4b5fd;
  --white: #fff8fc;
  --lane-0: #7dd3fc;
  --lane-1: #f9a8d4;
  --lane-2: #c4b5fd;
  --lane-3: #67e8f9;
  --danger: #fb7185;
  --ok: #86efac;
  --radius-xs: 6px;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --font-display: "Fredoka", "M PLUS Rounded 1c", ui-rounded, system-ui, sans-serif;
  --font-body: "M PLUS Rounded 1c", "Fredoka", ui-rounded, system-ui, sans-serif;
  --shadow: 0 18px 50px rgba(8, 6, 20, 0.45);
  --motion-quick: 150ms;
  --motion-fast: 250ms;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-pop: cubic-bezier(0.34, 1.36, 0.64, 1);
}

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

html,
body {
  height: 100%;
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  overflow: hidden;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

button,
input,
select {
  font-family: inherit;
}

button:not(:disabled),
[role="button"]:not(:disabled) {
  cursor: pointer;
}

#app {
  position: relative;
  height: 100%;
  display: flex;
  flex-direction: column;
  isolation: isolate;
}

#aurora {
  pointer-events: none;
  position: absolute;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(900px 420px at 12% -10%, rgba(110, 200, 255, 0.22), transparent 60%),
    radial-gradient(800px 420px at 88% -8%, rgba(255, 126, 179, 0.22), transparent 62%),
    radial-gradient(700px 500px at 50% 110%, rgba(196, 181, 253, 0.16), transparent 55%),
    linear-gradient(180deg, #161326 0%, #12101c 42%, #0e0c18 100%);
  transition: filter var(--motion-fast) var(--ease), opacity var(--motion-fast) var(--ease);
}

body.fever #aurora {
  filter: saturate(1.35) brightness(1.12);
  background:
    radial-gradient(900px 480px at 10% -10%, rgba(110, 200, 255, 0.38), transparent 58%),
    radial-gradient(860px 480px at 90% -6%, rgba(255, 126, 179, 0.4), transparent 58%),
    radial-gradient(640px 420px at 50% 100%, rgba(196, 181, 253, 0.32), transparent 50%),
    linear-gradient(180deg, #2a1840 0%, #16122a 50%, #100e1c 100%);
}

#spark-layer {
  pointer-events: none;
  position: absolute;
  inset: 0;
  z-index: 1;
  overflow: hidden;
}

.hud {
  position: relative;
  z-index: 5;
  display: grid;
  grid-template-columns: 1fr auto 1fr auto;
  align-items: center;
  gap: var(--space-3);
  padding: calc(10px + env(safe-area-inset-top)) var(--space-4) 8px;
}

.stat {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.stat:last-of-type {
  text-align: right;
  align-items: flex-end;
}

.stat-combo {
  text-align: center;
  align-items: center;
}

.stat-label {
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--muted);
  font-weight: 700;
}

.stat-value {
  font-family: var(--font-display);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: clamp(1.1rem, 3vw, 1.7rem);
  line-height: 1.1;
  color: var(--white);
}

.stat-combo .stat-value {
  color: var(--pink-soft);
  font-size: clamp(1.35rem, 4vw, 2.1rem);
}

.icon-btn {
  width: 40px;
  height: 40px;
  border: 1px solid color-mix(in oklab, var(--fg) 16%, transparent);
  background: color-mix(in oklab, var(--surface) 80%, transparent);
  color: var(--fg);
  border-radius: var(--radius-sm);
  display: grid;
  place-items: center;
}

.icon-btn:hover {
  background: var(--surface-2);
}

.progress {
  position: relative;
  z-index: 5;
  height: 3px;
  margin: 0 18px 4px;
  background: color-mix(in oklab, var(--fg) 10%, transparent);
  border-radius: 99px;
  overflow: hidden;
}

.progress i {
  display: block;
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--blue), var(--pink));
  border-radius: 99px;
}

#stage {
  position: relative;
  z-index: 3;
  flex: 1;
  display: flex;
  align-items: stretch;
  justify-content: center;
  gap: clamp(4px, 1.4vw, 18px);
  padding: 0 clamp(8px, 2vw, 24px);
  min-height: 0;
}

.actor-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  width: 200px;
  flex-shrink: 0;
}

.actor-stage {
  width: 200px;
  height: 280px;
  overflow: hidden;
  position: relative;
  transform-origin: 50% 100%;
  transition: transform 180ms var(--ease-pop);
}

.actor-stage.pop {
  transform: scale(1.06) translateY(-8px);
}

.actor-stage.miss {
  transform: scale(0.94) translateY(6px);
}

.actor {
  width: 200px;
  height: 280px;
  background-image: url("assets/sprites.png");
  background-repeat: no-repeat;
  background-size: 800% 400%;
  background-position: 0% 0%;
  filter: drop-shadow(0 10px 16px rgba(8, 6, 18, 0.45));
}

.actor-name {
  margin-top: 2px;
  font-family: var(--font-display);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--muted);
}

#wrap-lumi .actor-name {
  color: var(--blue-soft);
}

#wrap-rara .actor-name {
  color: var(--pink-soft);
}

#playfield {
  position: relative;
  flex: 1;
  max-width: 420px;
  min-width: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: color-mix(in oklab, #07060f 72%, transparent);
  box-shadow: inset 0 0 0 1px color-mix(in oklab, var(--fg) 10%, transparent), var(--shadow);
}

#lanes {
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none;
}

#judge {
  pointer-events: none;
  position: absolute;
  left: 50%;
  top: 38%;
  transform: translate(-50%, -50%) scale(0.7);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2rem, 7vw, 3.4rem);
  letter-spacing: 0.04em;
  opacity: 0;
  text-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
  white-space: nowrap;
}

#judge.show {
  animation: judge-pop 520ms var(--ease-pop) both;
}

#judge.perfect {
  color: #fff4c4;
}
#judge.great {
  color: var(--blue-soft);
}
#judge.good {
  color: var(--ok);
}
#judge.miss {
  color: var(--danger);
}

#combo-float {
  pointer-events: none;
  position: absolute;
  left: 50%;
  top: 24%;
  transform: translateX(-50%);
  font-family: var(--font-display);
  font-size: 1.1rem;
  color: var(--pink-soft);
  letter-spacing: 0.12em;
  opacity: 0.9;
}

#keys {
  position: relative;
  z-index: 5;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  max-width: 420px;
  width: calc(100% - 24px);
  margin: 8px auto calc(10px + env(safe-area-inset-bottom));
}

.key {
  height: 56px;
  border: 1px solid color-mix(in oklab, var(--fg) 14%, transparent);
  background: color-mix(in oklab, var(--surface) 88%, transparent);
  color: var(--fg);
  border-radius: var(--radius-md);
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  transition:
    transform 80ms var(--ease),
    background 80ms var(--ease),
    box-shadow 80ms var(--ease);
}

.key:nth-child(1) {
  box-shadow: inset 0 -3px 0 var(--lane-0);
}
.key:nth-child(2) {
  box-shadow: inset 0 -3px 0 var(--lane-1);
}
.key:nth-child(3) {
  box-shadow: inset 0 -3px 0 var(--lane-2);
}
.key:nth-child(4) {
  box-shadow: inset 0 -3px 0 var(--lane-3);
}

.key.active {
  transform: translateY(2px) scale(0.98);
  color: #0e0c18;
}

.key:nth-child(1).active {
  background: var(--lane-0);
}
.key:nth-child(2).active {
  background: var(--lane-1);
}
.key:nth-child(3).active {
  background: var(--lane-2);
}
.key:nth-child(4).active {
  background: var(--lane-3);
}

#overlay {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: color-mix(in oklab, #0b0914 62%, transparent);
  backdrop-filter: blur(8px);
}

#overlay.show {
  display: flex;
}

.panel {
  width: min(560px, 100%);
  background: var(--surface);
  border: 1px solid color-mix(in oklab, var(--fg) 12%, transparent);
  border-radius: var(--radius-xl);
  padding: 28px 24px 22px;
  box-shadow: var(--shadow);
}

.panel h2 {
  margin: 0 0 18px;
  text-align: center;
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: 0.08em;
}

.title-panel {
  padding: 18px 16px 20px;
}

.title-heroes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-areas:
    "copy copy"
    "lumi rara";
  align-items: end;
  gap: 6px;
  min-height: 0;
}

.title-heroes .hero:first-child {
  grid-area: lumi;
}

.title-heroes .hero:last-child {
  grid-area: rara;
}

.title-copy {
  grid-area: copy;
  text-align: center;
  padding-bottom: 4px;
}

.hero {
  width: 100%;
  height: 120px;
  object-fit: contain;
  object-position: center bottom;
  filter: drop-shadow(0 12px 18px rgba(0, 0, 0, 0.35));
  pointer-events: none;
}

.kicker {
  margin: 0;
  letter-spacing: 0.18em;
  font-size: 11px;
  color: var(--lilac);
  font-weight: 700;
}

.logo {
  margin: 4px 0 8px;
  font-family: var(--font-display);
  font-size: clamp(2.1rem, 8vw, 3.4rem);
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 0.95;
  background: linear-gradient(180deg, #ffffff 20%, var(--pink-soft) 80%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.song-line {
  margin: 0;
  color: var(--blue-soft);
  font-size: 0.92rem;
}

.hint {
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
  margin: 8px 0 12px;
}

.diff-row,
.rank-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 8px;
  margin: 0 0 10px;
}

.diff {
  appearance: none;
  min-height: 48px;
  border-radius: var(--radius-md);
  border: 1px solid color-mix(in oklab, var(--fg) 12%, transparent);
  background: color-mix(in oklab, var(--fg) 5%, transparent);
  color: var(--muted);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.08em;
  font-size: 0.78rem;
  padding: 6px 4px;
  transition:
    background var(--motion-quick) var(--ease),
    color var(--motion-quick) var(--ease),
    transform var(--motion-quick) var(--ease);
}

.diff small {
  font-size: 9px;
  letter-spacing: 0.14em;
  font-weight: 500;
  opacity: 0.75;
}

.diff.is-on {
  background: var(--white);
  color: #15111f;
  border-color: transparent;
}

.diff:active {
  transform: scale(0.98);
}

.diff-meta {
  text-align: center;
  color: var(--muted);
  font-size: 0.78rem;
  margin: 0 0 12px;
  letter-spacing: 0.08em;
}

.rank-list {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  max-height: min(42vh, 360px);
  overflow: auto;
}

.rank-row {
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr) 1.6rem auto;
  gap: 8px;
  align-items: center;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
}

.rank-row:nth-child(odd) {
  background: color-mix(in oklab, var(--fg) 5%, transparent);
}

.rank-n {
  font-family: var(--font-display);
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.rank-row:nth-child(1) .rank-n {
  color: var(--pink-soft);
}

.rank-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.rank-grade {
  font-family: var(--font-display);
  text-align: center;
  color: var(--blue-soft);
}

.rank-score {
  font-variant-numeric: tabular-nums;
  font-family: var(--font-display);
  text-align: right;
}

.rank-empty {
  text-align: center;
  color: var(--muted);
  padding: 28px 8px;
}

.result-diff {
  text-align: center;
  margin: 0;
  letter-spacing: 0.16em;
  font-size: 0.75rem;
  color: var(--lilac);
}

.result-rank {
  text-align: center;
  font-family: var(--font-display);
  letter-spacing: 0.12em;
  color: var(--pink-soft);
  margin: 0 0 10px;
}

.field input[type="text"] {
  width: 100%;
  min-height: 44px;
  border-radius: var(--radius-sm);
  border: 1px solid color-mix(in oklab, var(--fg) 14%, transparent);
  background: var(--bg);
  color: var(--fg);
  padding: 8px 12px;
}

.actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.btn {
  appearance: none;
  border: 1px solid transparent;
  border-radius: 14px;
  min-height: 48px;
  padding: 0 18px;
  font-weight: 700;
  letter-spacing: 0.08em;
  transition:
    transform var(--motion-quick) var(--ease),
    background var(--motion-quick) var(--ease),
    opacity var(--motion-quick) var(--ease);
}

.btn:active {
  transform: scale(0.98);
}

.btn.primary {
  background: var(--white);
  color: #15111f;
}

.btn.primary:hover {
  background: var(--pink-soft);
}

.btn.ghost {
  background: color-mix(in oklab, var(--fg) 6%, transparent);
  color: var(--fg);
  border-color: color-mix(in oklab, var(--fg) 12%, transparent);
}

.hi-score {
  text-align: center;
  color: var(--muted);
  font-size: 0.82rem;
  margin: 14px 0 0;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 14px;
  color: var(--muted);
  font-size: 0.88rem;
}

.field input[type="range"] {
  width: 100%;
  accent-color: var(--pink);
}

.field em {
  font-style: normal;
  color: var(--fg);
  float: right;
}

.file-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin: 8px 0 16px;
}

.file-btn {
  display: grid;
  place-items: center;
  position: relative;
  overflow: hidden;
}

.file-btn input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.debug {
  margin: 4px 0 16px;
  color: var(--muted);
  font-size: 0.86rem;
}

.debug-grid {
  display: grid;
  gap: 8px;
  margin-top: 10px;
}

.debug-grid input,
.debug-grid select {
  width: 100%;
  margin-top: 4px;
  background: var(--bg);
  color: var(--fg);
  border: 1px solid color-mix(in oklab, var(--fg) 14%, transparent);
  border-radius: 10px;
  padding: 8px 10px;
}

.loading-label {
  text-align: center;
  letter-spacing: 0.24em;
  font-family: var(--font-display);
}

.loading-bar {
  height: 6px;
  background: color-mix(in oklab, var(--fg) 10%, transparent);
  border-radius: 99px;
  overflow: hidden;
}

.loading-bar i {
  display: block;
  height: 100%;
  width: 30%;
  background: linear-gradient(90deg, var(--blue), var(--pink));
  animation: load 1.1s var(--ease) infinite;
}

.grade {
  margin: 0;
  text-align: center;
  font-family: var(--font-display);
  font-size: clamp(4rem, 16vw, 6.2rem);
  line-height: 0.9;
  background: linear-gradient(180deg, #fff 10%, var(--pink-soft) 90%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.result-kicker {
  text-align: center;
  color: var(--muted);
  letter-spacing: 0.14em;
  margin: 0 0 6px;
  font-size: 0.82rem;
}

.result-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px 16px;
  margin: 8px 0 20px;
}

.result-grid div {
  background: color-mix(in oklab, var(--fg) 5%, transparent);
  border-radius: 14px;
  padding: 10px 12px;
}

.result-grid dt {
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.result-grid dd {
  margin: 2px 0 0;
  font-family: var(--font-display);
  font-variant-numeric: tabular-nums;
  font-size: 1.25rem;
}

@keyframes judge-pop {
  0% {
    opacity: 0;
    transform: translate(-50%, -40%) scale(0.6);
  }
  24% {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1.12);
  }
  100% {
    opacity: 0;
    transform: translate(-50%, -70%) scale(1);
  }
}

@keyframes load {
  0% {
    transform: translateX(-120%);
  }
  100% {
    transform: translateX(400%);
  }
}

@media (min-width: 700px) {
  .title-heroes {
    grid-template-columns: 1fr auto 1fr;
    grid-template-areas: "lumi copy rara";
    min-height: 210px;
    align-items: end;
  }
  .hero {
    height: 240px;
  }
  .title-copy {
    padding-bottom: 28px;
  }
}

@media (max-width: 820px) {
  .actor-wrap {
    width: 120px;
  }
  .actor-stage,
  .actor {
    width: 120px;
    height: 168px;
  }
}

@media (max-width: 560px) {
  .hud {
    grid-template-columns: 1fr auto 1fr auto;
    padding-left: 10px;
    padding-right: 10px;
  }
  .title-heroes {
    min-height: 0;
  }
  .title-copy {
    padding-bottom: 0;
  }
  .title-heroes .hero {
    height: 118px;
    max-width: 140px;
    margin: 0 auto;
  }
  .title-panel {
    max-height: min(100dvh - 32px, 720px);
    overflow: auto;
    padding: 14px 12px 16px;
  }
  .logo {
    font-size: clamp(1.8rem, 12vw, 2.6rem);
  }
  .kicker {
    letter-spacing: 0.1em;
    white-space: nowrap;
  }
  .actor-wrap {
    position: absolute;
    bottom: 8px;
    width: 96px;
    z-index: 2;
    pointer-events: none;
    opacity: 0.95;
  }
  #wrap-lumi {
    left: 0;
  }
  #wrap-rara {
    right: 0;
  }
  .actor-stage,
  .actor {
    width: 96px;
    height: 134px;
  }
  .actor-name {
    display: none;
  }
  #playfield {
    max-width: none;
  }
  #keys {
    max-width: none;
    width: calc(100% - 16px);
  }
  .key {
    height: 52px;
  }
}

@media (prefers-reduced-motion: reduce) {
  #judge.show,
  .loading-bar i,
  .actor-stage {
    animation: none !important;
    transition: none !important;
  }
}