/* CHAIN BLAST — styles */

:root {
  --bg: #070b16;
  --bg-2: #0f1730;
  --panel: rgba(255, 255, 255, 0.06);
  --panel-line: rgba(255, 255, 255, 0.12);
  --text: #e9edff;
  --muted: #8f9ac4;
  --accent: #2ec4ff;
  --gap: 5px;

  --c-red: #ff4d6d;
  --c-orange: #ff9f1c;
  --c-yellow: #ffdc3d;
  --c-green: #3ddc84;
  --c-cyan: #2ec4ff;
  --c-blue: #5a7cff;
  --c-purple: #b06cff;
  --c-pink: #ff6ad5;
  --c-stone: #7c88ab;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background:
    radial-gradient(1100px 620px at 50% -12%, #1b2a5c 0%, transparent 62%),
    radial-gradient(760px 520px at 108% 108%, #3a1a55 0%, transparent 60%),
    var(--bg);
  color: var(--text);
  font-family: "Segoe UI", system-ui, -apple-system, "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
  -webkit-font-smoothing: antialiased;
  -webkit-tap-highlight-color: transparent;
  overscroll-behavior: none;
}

body { display: flex; justify-content: center; }

#app {
  width: min(100%, 520px);
  padding: 10px 12px calc(18px + env(safe-area-inset-bottom));
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* ───────── HUD ───────── */

#hud { display: flex; flex-direction: column; gap: 8px; }

.hud-row { display: flex; align-items: center; gap: 8px; }

.stat {
  flex: 1;
  background: var(--panel);
  border: 1px solid var(--panel-line);
  border-radius: 12px;
  padding: 6px 12px;
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.stat-label { font-size: 10px; letter-spacing: .16em; color: var(--muted); }

.stat-value {
  font-size: 24px;
  font-weight: 800;
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
  transition: transform .12s ease;
}

.stat-value.pop { transform: scale(1.18); color: #fff; }

.stat-best .stat-value { font-size: 18px; color: var(--muted); }

.icon-btn {
  width: 40px; height: 40px;
  flex: none;
  border-radius: 12px;
  border: 1px solid var(--panel-line);
  background: var(--panel);
  color: var(--text);
  font-size: 18px;
  cursor: pointer;
  transition: transform .1s ease, background .15s ease;
}

.icon-btn:hover { background: rgba(255, 255, 255, .12); }
.icon-btn:active { transform: scale(.92); }
.icon-btn.off { opacity: .4; }

.hud-row-sub { gap: 10px; }

.level-box { flex: 1; display: flex; align-items: center; gap: 8px; min-width: 0; }

.level-tag { font-size: 12px; color: var(--muted); white-space: nowrap; }
.level-tag b { color: var(--text); font-size: 14px; }

.level-bar {
  flex: 1;
  height: 6px;
  border-radius: 99px;
  background: rgba(255, 255, 255, .1);
  overflow: hidden;
}

.level-bar i {
  display: block;
  height: 100%;
  width: 0%;
  border-radius: 99px;
  background: linear-gradient(90deg, var(--c-cyan), var(--c-purple));
  transition: width .3s ease;
}

.combo-badge {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .1em;
  padding: 4px 10px;
  border-radius: 99px;
  border: 1px solid transparent;
  color: var(--muted);
  background: rgba(255, 255, 255, .05);
  white-space: nowrap;
  transition: all .18s ease;
}

.combo-badge.on {
  color: #0a0f22;
  background: linear-gradient(90deg, var(--c-yellow), var(--c-orange));
  border-color: rgba(255, 255, 255, .5);
  box-shadow: 0 0 18px rgba(255, 180, 60, .45);
}

.combo-badge.bump { transform: scale(1.16); }

/* ───────── Board ───────── */

#stage { display: flex; justify-content: center; }

#board-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
}

#board-wrap.shake { animation: shake .32s ease; }

@keyframes shake {
  0%, 100% { transform: translate(0, 0); }
  20% { transform: translate(-6px, 3px) rotate(-.5deg); }
  40% { transform: translate(5px, -4px) rotate(.4deg); }
  60% { transform: translate(-4px, -3px); }
  80% { transform: translate(3px, 3px); }
}

#board {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  grid-template-rows: repeat(8, 1fr);
  gap: var(--gap);
  padding: var(--gap);
  border-radius: 18px;
  background: linear-gradient(160deg, rgba(255, 255, 255, .07), rgba(255, 255, 255, .02));
  border: 1px solid var(--panel-line);
  box-shadow: 0 18px 50px rgba(0, 0, 0, .5), inset 0 0 0 1px rgba(255, 255, 255, .03);
  touch-action: none;
}

.cell {
  position: relative;
  border-radius: 8px;
  background: rgba(255, 255, 255, .045);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .03);
}

/* 置いたブロック */
.block {
  position: absolute;
  inset: 0;
  border-radius: 8px;
  background: var(--bc, #888);
  box-shadow:
    inset 0 2px 0 rgba(255, 255, 255, .45),
    inset 0 -3px 0 rgba(0, 0, 0, .28),
    0 2px 6px rgba(0, 0, 0, .35);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  line-height: 1;
  animation: pop-in .16s ease;
}

@keyframes pop-in {
  from { transform: scale(.6); opacity: .2; }
  to { transform: scale(1); opacity: 1; }
}

.block.stone {
  --bc: var(--c-stone);
  background:
    repeating-linear-gradient(45deg, rgba(0, 0, 0, .16) 0 5px, transparent 5px 10px),
    var(--c-stone);
}

.block.cracked::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 8px;
  background:
    linear-gradient(120deg, transparent 46%, rgba(0, 0, 0, .55) 47%, transparent 49%),
    linear-gradient(-140deg, transparent 58%, rgba(0, 0, 0, .45) 59%, transparent 61%);
}

.block.special { animation: pop-in .16s ease, glow 1.4s ease-in-out infinite; }

@keyframes glow {
  0%, 100% { box-shadow: inset 0 2px 0 rgba(255, 255, 255, .45), 0 0 4px rgba(255, 255, 255, .3); }
  50% { box-shadow: inset 0 2px 0 rgba(255, 255, 255, .45), 0 0 16px rgba(255, 255, 255, .95); }
}

/* 配置プレビュー */
.cell.preview::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 8px;
  background: var(--pc, #fff);
  opacity: .38;
  box-shadow: inset 0 0 0 2px rgba(255, 255, 255, .55);
}

.cell.bad::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 8px;
  background: var(--c-red);
  opacity: .3;
}

.cell.will-clear { animation: willclear .6s ease-in-out infinite; }

@keyframes willclear {
  0%, 100% { background: rgba(255, 255, 255, .1); }
  50% { background: rgba(255, 255, 255, .35); }
}

.cell.target { box-shadow: inset 0 0 0 2px rgba(255, 255, 255, .8); }

/* 消滅アニメ */
.block.clearing {
  animation: clear-out .28s ease forwards;
  z-index: 2;
}

@keyframes clear-out {
  0% { transform: scale(1); filter: brightness(1); }
  35% { transform: scale(1.24); filter: brightness(2.4); }
  100% { transform: scale(.1) rotate(22deg); opacity: 0; }
}

/* ───────── FX layer ───────── */

#fx {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  border-radius: 18px;
}

.particle {
  position: absolute;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--pcol, #fff);
  animation: fly var(--dur, .7s) cubic-bezier(.2, .7, .4, 1) forwards;
}

@keyframes fly {
  0% { transform: translate(0, 0) scale(1); opacity: 1; }
  100% { transform: translate(var(--dx), var(--dy)) scale(.2) rotate(var(--rot)); opacity: 0; }
}

.float-score {
  position: absolute;
  transform: translate(-50%, -50%);
  font-weight: 900;
  font-size: 20px;
  color: #fff;
  text-shadow: 0 2px 10px rgba(0, 0, 0, .8);
  animation: floatup 1s ease forwards;
  white-space: nowrap;
}

@keyframes floatup {
  0% { transform: translate(-50%, -50%) scale(.6); opacity: 0; }
  25% { transform: translate(-50%, -70%) scale(1.15); opacity: 1; }
  100% { transform: translate(-50%, -140%) scale(1); opacity: 0; }
}

#toast {
  position: absolute;
  left: 50%;
  top: 42%;
  transform: translate(-50%, -50%);
  pointer-events: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.toast-line {
  font-weight: 900;
  font-size: clamp(20px, 7vw, 34px);
  letter-spacing: .05em;
  background: linear-gradient(90deg, var(--c-yellow), var(--c-pink));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 3px 12px rgba(0, 0, 0, .8));
  animation: toastpop 1.05s ease forwards;
}

@keyframes toastpop {
  0% { transform: scale(.4) rotate(-6deg); opacity: 0; }
  22% { transform: scale(1.12) rotate(2deg); opacity: 1; }
  70% { transform: scale(1); opacity: 1; }
  100% { transform: scale(.94) translateY(-16px); opacity: 0; }
}

/* ───────── Power-ups ───────── */

#powerups {
  display: flex;
  align-items: center;
  gap: 8px;
}

.pw {
  position: relative;
  width: 48px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid var(--panel-line);
  background: var(--panel);
  color: var(--text);
  cursor: pointer;
  transition: transform .1s ease, box-shadow .2s ease, opacity .2s ease;
}

.pw .pw-icon { font-size: 20px; }

.pw-count {
  position: absolute;
  right: 2px;
  bottom: 0px;
  font-size: 11px;
  font-weight: 800;
  background: #0a0f22;
  border-radius: 99px;
  padding: 0 5px;
  border: 1px solid var(--panel-line);
}

.pw:disabled { opacity: .32; cursor: default; }
.pw:not(:disabled):active { transform: scale(.92); }

.pw.armed {
  box-shadow: 0 0 0 2px var(--c-cyan), 0 0 20px rgba(46, 196, 255, .55);
  background: rgba(46, 196, 255, .16);
}

.charge { flex: 1; display: flex; align-items: center; gap: 8px; min-width: 0; }

.charge-label { font-size: 10px; letter-spacing: .14em; color: var(--muted); }

.charge-bar {
  flex: 1;
  height: 8px;
  border-radius: 99px;
  background: rgba(255, 255, 255, .1);
  overflow: hidden;
}

.charge-bar i {
  display: block;
  height: 100%;
  width: 0%;
  border-radius: 99px;
  background: linear-gradient(90deg, var(--c-green), var(--c-yellow));
  transition: width .25s ease;
}

/* ───────── Tray ───────── */

#tray {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  min-height: 104px;
}

.slot {
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: rgba(255, 255, 255, .04);
  border: 1px solid var(--panel-line);
  padding: 8px;
  touch-action: none;
  transition: background .15s ease, transform .12s ease;
}

.slot.selected { background: rgba(46, 196, 255, .16); box-shadow: 0 0 0 2px var(--c-cyan) inset; }
.slot.dragging { opacity: .28; }
.slot.dead { opacity: .34; filter: grayscale(.8); }
.slot.refill { animation: pop-in .22s ease; }

.mini {
  display: grid;
  gap: 3px;
  cursor: grab;
}

.mini .mb {
  width: var(--ms, 16px);
  height: var(--ms, 16px);
  border-radius: 4px;
  background: var(--bc, #888);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .45), inset 0 -2px 0 rgba(0, 0, 0, .25);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
}

.mini .mb.empty { background: transparent; box-shadow: none; }

/* ドラッグ中のゴースト */
#ghost {
  position: fixed;
  z-index: 60;
  pointer-events: none;
  display: grid;
  filter: drop-shadow(0 12px 18px rgba(0, 0, 0, .5));
}

#ghost .gb {
  border-radius: 8px;
  background: var(--bc, #888);
  box-shadow: inset 0 2px 0 rgba(255, 255, 255, .45), inset 0 -3px 0 rgba(0, 0, 0, .28);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
}

#ghost .gb.empty { background: transparent; box-shadow: none; }

#hint {
  margin: 0;
  text-align: center;
  font-size: 11px;
  color: var(--muted);
}

/* ───────── Help ───────── */

#help {
  background: var(--panel);
  border: 1px solid var(--panel-line);
  border-radius: 12px;
  padding: 8px 12px;
  font-size: 12px;
  color: var(--muted);
}

#help summary { cursor: pointer; color: var(--text); font-weight: 700; }
#help ul { margin: 8px 0 4px; padding-left: 18px; line-height: 1.7; }
#help b { color: var(--text); }

/* ───────── Overlay ───────── */

#overlay {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(4, 7, 16, .78);
  backdrop-filter: blur(6px);
  padding: 20px;
}

#overlay.hidden { display: none; }

.panel {
  width: min(100%, 380px);
  background: linear-gradient(160deg, #16204a, #0d1330);
  border: 1px solid var(--panel-line);
  border-radius: 20px;
  padding: 22px;
  text-align: center;
  box-shadow: 0 30px 80px rgba(0, 0, 0, .6);
  animation: pop-in .24s ease;
}

.panel h2 {
  margin: 0 0 4px;
  font-size: 30px;
  letter-spacing: .06em;
  background: linear-gradient(90deg, var(--c-pink), var(--c-yellow));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

#ov-sub { margin: 0 0 16px; color: var(--muted); font-size: 13px; }

.ov-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 18px;
}

.ov-stats div {
  background: rgba(255, 255, 255, .05);
  border-radius: 12px;
  padding: 8px 4px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.ov-stats span { font-size: 10px; letter-spacing: .12em; color: var(--muted); }
.ov-stats b { font-size: 18px; font-variant-numeric: tabular-nums; }

.ov-actions { display: flex; flex-direction: column; gap: 8px; }

.btn {
  border: 0;
  border-radius: 12px;
  padding: 12px;
  font-size: 15px;
  font-weight: 800;
  cursor: pointer;
  transition: transform .1s ease, filter .15s ease;
}

.btn:active { transform: scale(.97); }

.btn-primary {
  background: linear-gradient(90deg, var(--c-cyan), var(--c-purple));
  color: #08122b;
}

.btn-ghost {
  background: rgba(255, 255, 255, .08);
  border: 1px solid var(--panel-line);
  color: var(--text);
}

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

/* 背の高いデスクトップでは上下中央に */
@media (min-width: 700px) and (min-height: 820px) {
  body { align-items: center; }
  #app { width: min(100%, 560px); }
}

@media (max-width: 380px) {
  .stat-value { font-size: 20px; }
  #tray { min-height: 92px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::after, *::before { animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}