:root {
  --panel: rgba(11, 17, 34, 0.94);
  --panel-soft: rgba(17, 27, 52, 0.9);
  --panel-softer: rgba(22, 33, 60, 0.7);
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.14);
  --text: #f5f7ff;
  --muted: #aeb9d6;
  --accent: #7c9cff;
  --accent-2: #30d9b8;
  --warning: #ffd274;
  --danger: #ff7b94;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.36);
  --radius-xl: 26px;
  --radius-lg: 18px;
  --radius-md: 14px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top, rgba(124, 156, 255, 0.22), transparent 34%),
    radial-gradient(circle at bottom right, rgba(48, 217, 184, 0.16), transparent 30%),
    linear-gradient(180deg, #0a0f1d 0%, #0b1020 55%, #090d18 100%);
}

body {
  padding: clamp(12px, 1.4vw, 20px);
}

button,
input,
select {
  font: inherit;
}

.page-shell {
  width: min(1320px, 100%);
  min-height: calc(100dvh - 24px);
  margin: 0 auto;
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 14px;
}

.hero {
  display: flex;
  align-items: center;
  min-height: 44px;
}

.hero h1 {
  margin: 0;
  font-size: clamp(32px, 3vw, 40px);
  line-height: 1.05;
}

.desktop-shell,
.mobile-shell {
  min-height: 0;
}

.panel {
  position: relative;
  overflow: hidden;
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
  border-radius: var(--radius-xl);
  min-height: 0;
}

.panel-elevated {
  background:
    radial-gradient(circle at top right, rgba(124, 156, 255, 0.14), transparent 34%),
    linear-gradient(180deg, rgba(13, 19, 38, 0.96), rgba(10, 15, 30, 0.94));
}

.panel-elevated::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 3px;
  background: linear-gradient(90deg, rgba(124, 156, 255, 0.95), rgba(48, 217, 184, 0.95));
}

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.compact-head {
  margin-bottom: 10px;
}

.panel h3 {
  margin: 0;
  font-size: 16px;
}

.panel-caption,
.mode-desc,
.mode-meta {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.45;
}

.primary-btn,
.ghost-btn,
.control-btn,
.mini-ghost-btn {
  border: 0;
  border-radius: 18px;
  font-weight: 800;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, opacity 0.18s ease;
}

.primary-btn:hover,
.ghost-btn:hover,
.control-btn:hover,
.mini-ghost-btn:hover {
  transform: translateY(-1px);
}

.primary-btn {
  color: #08111c;
  background: linear-gradient(135deg, #b7c8ff 0%, #6df0d8 100%);
  box-shadow: 0 10px 24px rgba(109, 240, 216, 0.22);
}

.ghost-btn,
.mini-ghost-btn {
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.mini-ghost-btn {
  min-height: 34px;
  padding: 0 12px;
  border-radius: 999px;
  font-size: 12px;
}

.state-pill {
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.state-pill.idle {
  color: #d6deff;
  background: rgba(124, 156, 255, 0.16);
}

.state-pill.playing {
  color: #d6fff4;
  background: rgba(48, 217, 184, 0.16);
}

.state-pill.paused {
  color: #fff0c7;
  background: rgba(255, 204, 102, 0.16);
}

.state-pill.gameover {
  color: #ffd6df;
  background: rgba(255, 123, 148, 0.16);
}

.board-frame {
  position: relative;
  width: min(100%, 460px);
  margin: 0 auto;
  border-radius: 22px;
  overflow: hidden;
  padding: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    linear-gradient(90deg, rgba(26, 40, 74, 0.98) 0%, rgba(26, 40, 74, 0.98) 18%, rgba(6, 15, 33, 0.99) 18%, rgba(6, 15, 33, 0.99) 82%, rgba(26, 40, 74, 0.98) 82%, rgba(26, 40, 74, 0.98) 100%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.04), transparent);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.04), inset 0 -28px 44px rgba(0, 0, 0, 0.18);
}

.board-frame.danger {
  box-shadow:
    inset 0 0 0 1px rgba(255,255,255,0.04),
    inset 0 -28px 44px rgba(0, 0, 0, 0.18),
    0 0 0 1px rgba(255, 123, 148, 0.2),
    0 0 26px rgba(255, 123, 148, 0.22);
  animation: dangerPulse 0.9s ease-in-out infinite alternate;
}

@keyframes dangerPulse {
  from { box-shadow: inset 0 0 0 1px rgba(255,255,255,0.04), inset 0 -28px 44px rgba(0, 0, 0, 0.18), 0 0 0 1px rgba(255, 123, 148, 0.14), 0 0 18px rgba(255, 123, 148, 0.14); }
  to { box-shadow: inset 0 0 0 1px rgba(255,255,255,0.04), inset 0 -28px 44px rgba(0, 0, 0, 0.18), 0 0 0 1px rgba(255, 123, 148, 0.34), 0 0 32px rgba(255, 123, 148, 0.28); }
}

#desktop-board,
#mobile-board {
  display: block;
  width: 100%;
  aspect-ratio: 1 / 2;
  border-radius: 18px;
  background: transparent;
  touch-action: none;
}

.overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s ease;
}

.overlay.visible {
  opacity: 1;
}

.overlay-panel {
  min-width: 200px;
  max-width: 320px;
  padding: 18px 22px;
  border-radius: 22px;
  text-align: center;
  background: rgba(4, 9, 20, 0.78);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 18px 36px rgba(0, 0, 0, 0.28);
}

.compact-overlay {
  min-width: 160px;
  padding: 16px 18px;
}

.overlay-kicker {
  margin: 0 0 4px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.overlay-title {
  margin: 0;
  font-size: clamp(24px, 2.6vw, 42px);
}

.overlay-desc {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.fx-toast,
.board-banner {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  z-index: 5;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.18s ease, transform 0.18s ease;
}

.fx-toast {
  top: 14px;
  min-width: 164px;
  padding: 12px 16px;
  text-align: center;
  border-radius: 18px;
  background: rgba(7, 12, 22, 0.76);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 14px 28px rgba(0, 0, 0, 0.28);
  transform: translate(-50%, -14px) scale(0.96);
}

.fx-toast.show {
  opacity: 1;
  transform: translate(-50%, 0) scale(1);
}

.fx-toast strong {
  display: block;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.fx-toast span {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  color: var(--muted);
}

.board-banner {
  top: 18%;
  min-width: 180px;
  padding: 14px 18px;
  border-radius: 20px;
  text-align: center;
  background: rgba(7, 12, 22, 0.78);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 16px 34px rgba(0, 0, 0, 0.28);
  transform: translate(-50%, -6px) scale(0.96);
}

.board-banner.show {
  opacity: 1;
  transform: translate(-50%, 0) scale(1);
}

.board-banner.accent {
  border-color: rgba(109, 240, 216, 0.28);
}

.board-banner.warning {
  border-color: rgba(255, 210, 116, 0.28);
}

.board-banner.danger {
  border-color: rgba(255, 123, 148, 0.36);
}

.board-banner strong {
  display: block;
  font-size: clamp(20px, 2vw, 28px);
  letter-spacing: 0.06em;
}

.board-banner span {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  color: var(--muted);
}

.mobile-start-hint {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 4;
  display: grid;
  gap: 6px;
  max-width: 148px;
  opacity: 0;
  transform: translateY(-6px);
  transition: opacity 0.18s ease, transform 0.18s ease;
}

.mobile-start-hint.show {
  opacity: 1;
  transform: translateY(0);
}

.mobile-start-hint span {
  display: block;
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.94);
  background: rgba(7, 12, 22, 0.74);
  border: 1px solid rgba(255, 255, 255, 0.09);
}

.stats-grid,
.mobile-stats-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.stat-item,
.battle-item,
.preview-box,
.inner-panel {
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.stat-item {
  padding: 10px 12px;
  background: var(--panel-soft);
}

.stat-label,
.battle-label,
.field > span:first-child,
.name-field span {
  display: block;
  color: var(--muted);
  font-size: 12px;
}

.stat-item strong,
.battle-item strong,
.rank-score {
  font-family: "Roboto Mono", monospace;
}

.stat-item strong {
  display: block;
  margin-top: 6px;
  font-size: clamp(18px, 1.8vw, 24px);
}

.battle-grid,
.mobile-battle-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin-top: 10px;
}

.judgement-item {
  grid-column: 1 / -1;
  background: linear-gradient(180deg, rgba(48, 217, 184, 0.1), rgba(48, 217, 184, 0.03));
}

.battle-item {
  padding: 10px 11px;
  background: linear-gradient(180deg, rgba(124, 156, 255, 0.08), rgba(124, 156, 255, 0.03));
}

.battle-item strong {
  display: block;
  margin-top: 6px;
  font-size: clamp(16px, 1.8vw, 20px);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.field {
  display: grid;
  gap: 5px;
}

.select-shell {
  position: relative;
  display: block;
}

.select-shell::after {
  content: "";
  position: absolute;
  right: 14px;
  top: 50%;
  width: 9px;
  height: 9px;
  border-right: 2px solid rgba(245, 247, 255, 0.86);
  border-bottom: 2px solid rgba(245, 247, 255, 0.86);
  transform: translateY(-65%) rotate(45deg);
  pointer-events: none;
}

select,
input[type="text"] {
  width: 100%;
  padding: 12px 40px 12px 14px;
  color: var(--text);
  background: linear-gradient(180deg, rgba(25, 34, 60, 0.95), rgba(16, 24, 44, 0.95));
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 14px;
  outline: none;
}

select {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
}

select option {
  color: #f5f7ff;
  background: #111a32;
}

input[type="text"] {
  padding-right: 14px;
}

select:focus,
input[type="text"]:focus {
  border-color: rgba(124, 156, 255, 0.5);
  box-shadow: 0 0 0 3px rgba(124, 156, 255, 0.14);
}

.toggle-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 10px;
}

.toggle-pill {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.toggle-pill input {
  accent-color: #6df0d8;
}

.compact-panel {
  padding: 12px;
}

.leaderboard-panel {
  padding: 12px;
  display: grid;
  grid-template-rows: auto auto 1fr;
  min-height: 0;
}

.leaderboard-tools {
  margin-bottom: 10px;
}

.name-field {
  display: grid;
  gap: 5px;
}

.leaderboard-scroll {
  min-height: 0;
  height: 200px;
  padding-right: 4px;
  overflow-y: auto;
}

.leaderboard-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.leaderboard-item,
.empty-rank {
  display: grid;
  grid-template-columns: 34px 1fr auto;
  gap: 10px;
  align-items: center;
  padding: 10px 12px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.leaderboard-item.current {
  background: linear-gradient(90deg, rgba(124, 156, 255, 0.16), rgba(48, 217, 184, 0.12));
  border-color: rgba(109, 240, 216, 0.22);
  box-shadow: inset 0 0 0 1px rgba(109, 240, 216, 0.1);
}

.empty-rank {
  grid-template-columns: 1fr;
  gap: 6px;
  text-align: left;
  min-height: 96px;
  align-content: center;
}

.empty-rank strong {
  font-size: 15px;
}

.empty-rank span {
  color: var(--muted);
  line-height: 1.6;
}

.rank-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 999px;
  font-weight: 800;
  background: rgba(255, 255, 255, 0.08);
}

.rank-meta {
  display: grid;
  gap: 2px;
}

.rank-meta strong {
  font-size: 14px;
}

.rank-meta span {
  color: var(--muted);
  font-size: 12px;
}

.rank-score {
  font-size: 16px;
  font-weight: 700;
}

.rank-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 3px;
  color: #6df0d8;
  font-size: 11px;
  font-weight: 800;
}

.preview-panel {
  padding: 12px;
  display: grid;
  gap: 12px;
}

.preview-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.preview-box {
  padding: 10px;
  background: linear-gradient(180deg, rgba(124, 156, 255, 0.07), rgba(124, 156, 255, 0.02));
}

.preview-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 8px;
  margin-bottom: 8px;
}

.preview-head h3 {
  font-size: 15px;
}

.preview-head span {
  color: var(--muted);
  font-size: 11px;
}

#next-canvas-desktop,
#hold-canvas-desktop,
#next-canvas-mobile,
#hold-canvas-mobile {
  display: block;
  width: 100%;
  aspect-ratio: 1 / 1;
  border-radius: 14px;
}

.action-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.short-btn,
.rail-btn {
  min-height: 48px;
}

.help-panel {
  padding: 12px;
}

.help-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.tips-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 6px;
}

.dense-list li {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  padding: 7px 0;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.07);
  color: var(--muted);
}

.dense-list li span:first-child {
  color: var(--text);
  font-weight: 700;
}

.mobile-controls {
  display: grid;
  gap: 10px;
  margin-top: 12px;
}

.move-cluster {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.control-btn {
  min-height: 52px;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
  font-size: 18px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
  touch-action: manipulation;
}

.control-btn.action {
  background: linear-gradient(135deg, rgba(124, 156, 255, 0.25), rgba(48, 217, 184, 0.18));
}

.control-btn.utility {
  background: rgba(255, 204, 102, 0.16);
}

.desktop-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 330px;
  grid-template-areas:
    "board side"
    "help side";
  gap: 14px;
  align-items: start;
}

.desktop-board-card {
  grid-area: board;
  padding: 12px;
}

.board-stage-wrap {
  display: grid;
  align-items: center;
  min-height: clamp(540px, 70vh, 760px);
}

.desktop-side-stack {
  grid-area: side;
  display: grid;
  gap: 12px;
  align-content: start;
}

.status-panel,
.mode-panel {
  padding: 12px;
}

.desktop-help-panel {
  grid-area: help;
}

.mobile-shell {
  display: none;
}

.mobile-stage-card {
  padding: 12px;
}

.mobile-stage-main {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 112px;
  gap: 10px;
  align-items: start;
}

.mobile-board-frame {
  width: 100%;
  padding: 8px;
}

.mobile-side-rail {
  display: grid;
  gap: 10px;
  align-content: start;
}

.compact-preview-box {
  padding: 8px;
}

.mini-preview-head {
  display: grid;
  gap: 2px;
}

.mini-preview-head span {
  font-size: 10px;
}

.mobile-rail-actions {
  display: grid;
  gap: 8px;
}

.mobile-status-panel {
  margin-top: 12px;
  padding: 10px;
}

.compact-stat strong,
.compact-battle-item strong {
  font-size: 16px;
}

.mobile-leaderboard-scroll {
  height: 220px;
}

.mobile-help-columns {
  grid-template-columns: 1fr;
}

@media (max-width: 960px) {
  body {
    padding: 10px;
  }

  .page-shell {
    min-height: auto;
    gap: 10px;
  }

  .hero {
    min-height: 38px;
  }

  .hero h1 {
    font-size: 28px;
  }

  .desktop-shell {
    display: none;
  }

  .mobile-shell {
    display: grid;
    gap: 10px;
  }

  .mobile-stage-card {
    position: relative;
  }

  .mobile-stage-main {
    grid-template-columns: minmax(0, 1fr) 106px;
  }

  .mobile-board-frame {
    min-height: 0;
  }

  #mobile-board {
    aspect-ratio: 1 / 2;
  }

  .mobile-status-panel .mode-meta {
    margin-top: 8px;
  }

  .mobile-form-grid {
    grid-template-columns: 1fr;
  }

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

  .leaderboard-scroll {
    height: 214px;
  }

  .rank-meta strong {
    font-size: 13px;
  }
}

@media (max-width: 560px) {
  .mobile-stage-main {
    grid-template-columns: minmax(0, 1fr) 98px;
    gap: 8px;
  }

  .preview-head h3,
  .mini-preview-head h3 {
    font-size: 13px;
  }

  .rail-btn,
  .control-btn {
    min-height: 46px;
  }

  .stats-grid,
  .mobile-stats-grid,
  .mobile-battle-row {
    gap: 6px;
  }

  .stat-item,
  .battle-item {
    padding: 9px 10px;
  }

  .toggle-pill {
    min-height: 42px;
  }

  .help-columns {
    grid-template-columns: 1fr;
  }
}