/* ============================================================
   Neon Pulse — style.css  v1.1.0
   ============================================================ */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg:        #0a0a0a;
  --tile-base: #1e2430;
  --tile-open: #0d1b2a;
  --border:    #3a4a5a;
  --cyan:      #00f5ff;
  --green:     #39ff14;
  --red:       #ff2d55;
  --yellow:    #ffe600;
  --purple:    #bf5fff;
  --orange:    #ff9500;
  --white:     #e0e0e0;
  --dim:       #99a8b8;
  --font:      'Courier New', Courier, monospace;
  --cols:      10;
}

.hidden { display: none !important; }

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--white);
  font-family: var(--font);
  overflow-x: hidden;
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  user-select: none;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ============================================================
   難易度選択画面
   ============================================================ */
#difficulty-screen {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  z-index: 100;
}

#difficulty-screen.hidden {
  display: none;
}

#diff-box {
  text-align: center;
  padding: 40px 32px;
  border: 1px solid var(--cyan);
  background: #050d14;
  border-radius: 4px;
  box-shadow: 0 0 40px rgba(0, 245, 255, 0.2);
  width: min(92vw, 420px);
}

#diff-title {
  font-size: clamp(1.8rem, 7vw, 2.8rem);
  font-weight: bold;
  letter-spacing: 0.3em;
  color: var(--cyan);
  text-shadow: 0 0 10px var(--cyan), 0 0 30px var(--cyan);
  margin-bottom: 6px;
}

#diff-sub {
  font-size: 0.75rem;
  letter-spacing: 0.25em;
  color: var(--dim);
  margin-bottom: 28px;
}

#diff-buttons {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.diff-btn {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  padding: 14px 20px;
  font-family: var(--font);
  background: transparent;
  border: 1px solid #333;
  color: var(--white);
  cursor: pointer;
  border-radius: 2px;
  transition: border-color 0.2s, background 0.2s, box-shadow 0.2s;
  width: 100%;
  text-align: left;
}

.diff-btn:hover {
  border-color: var(--cyan);
  background: rgba(0, 245, 255, 0.06);
  box-shadow: 0 0 12px rgba(0, 245, 255, 0.25);
}

.diff-btn[data-diff="easy"]:hover   { border-color: var(--green); box-shadow: 0 0 12px rgba(57,255,20,0.25); }
.diff-btn[data-diff="normal"]:hover { border-color: var(--cyan);  box-shadow: 0 0 12px rgba(0,245,255,0.25); }
.diff-btn[data-diff="hard"]:hover   { border-color: var(--red);   box-shadow: 0 0 12px rgba(255,45,85,0.25); }

.diff-label {
  font-size: 1rem;
  font-weight: bold;
  letter-spacing: 0.2em;
}

.diff-btn[data-diff="easy"]   .diff-label { color: var(--green); }
.diff-btn[data-diff="normal"] .diff-label { color: var(--cyan); }
.diff-btn[data-diff="hard"]   .diff-label { color: var(--red); }

.diff-desc {
  font-size: 0.72rem;
  color: #8ab8cc;
  letter-spacing: 0.05em;
}

/* ============================================================
   ゲーム画面
   ============================================================ */
#game-screen {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-height: 100dvh; /* モバイルブラウザUIを考慮した動的ビューポート高さ */
}

#game-screen.hidden {
  display: none;
}

/* ---------- ヘッダー ---------- */
header {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 12px 16px 8px;
  border-bottom: 1px solid #1e1e1e;
  background: #050505;
}

#title-block {
  display: flex;
  align-items: center;
  gap: 10px;
}

#title-text {
  font-size: clamp(1.2rem, 4vw, 1.8rem);
  font-weight: bold;
  letter-spacing: 0.25em;
  color: var(--cyan);
  text-shadow: 0 0 8px var(--cyan), 0 0 20px var(--cyan);
}

.pulse-word {
  color: #fff;
  text-shadow: 0 0 6px #fff, 0 0 16px var(--cyan);
}

#diff-badge {
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  padding: 2px 8px;
  border-radius: 2px;
  border: 1px solid currentColor;
}

#diff-badge.easy   { color: var(--green); }
#diff-badge.normal { color: var(--cyan); }
#diff-badge.hard   { color: var(--red); }

#status-block {
  display: flex;
  gap: 20px;
  font-size: clamp(0.75rem, 2.2vw, 0.9rem);
  letter-spacing: 0.1em;
}

.label {
  color: #b0c8d8;
  margin-right: 4px;
}

#shield-display, #timer-display, #pulse-display {
  display: flex;
  align-items: center;
  gap: 4px;
}

.shield-icon {
  display: inline-block;
  width: 12px;
  height: 12px;
  background: var(--cyan);
  clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
  box-shadow: 0 0 5px var(--cyan);
  transition: background 0.3s, box-shadow 0.3s;
}

.shield-icon.lost {
  background: #333;
  box-shadow: none;
}

/* プログレスバー */
#progress-bar-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  width: min(90vw, 500px);
  font-size: clamp(0.65rem, 1.8vw, 0.78rem);
  letter-spacing: 0.08em;
  color: #a8bfcc;
}

#progress-bar-bg {
  flex: 1;
  height: 4px;
  background: #222;
  border-radius: 2px;
  overflow: hidden;
}

#progress-bar-fill {
  height: 100%;
  width: 0%;
  background: var(--cyan);
  border-radius: 2px;
  transition: width 0.3s ease, background 0.3s;
  box-shadow: 0 0 6px var(--cyan);
}

#progress-bar-fill.goal-ready {
  background: var(--green);
  box-shadow: 0 0 10px var(--green);
}

#progress-label {
  color: #a8bfcc;
  min-width: 110px;
}

#node-label {
  color: #a8bfcc;
  min-width: 70px;
  text-align: right;
}

/* ---------- メイン ---------- */
main {
  flex: 1;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 10px;
  overflow: auto;
}

#grid-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  max-width: 100%;
  overflow: hidden;
}

#grid {
  display: grid;
  grid-template-columns: repeat(var(--cols), var(--tile-size));
  grid-template-rows:    repeat(var(--cols), var(--tile-size));
  gap: 2px;
}

/* ---------- タイル ---------- */
.tile {
  width:  var(--tile-size);
  height: var(--tile-size);
  background: var(--tile-base);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font);
  font-weight: bold;
  font-size: calc(var(--tile-size) * 0.42);
  cursor: pointer;
  user-select: none;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
  touch-action: manipulation;
  transition: background 0.12s, box-shadow 0.12s;
  border-radius: 2px;
  position: relative;
}

.tile:hover:not(.open):not(.flagged):not(.goal-locked) {
  background: #2e3d50;
  box-shadow: 0 0 6px rgba(0, 245, 255, 0.3);
}

@media (hover: none) {
  .tile:active:not(.open):not(.flagged) {
    background: #3a3a3a;
  }
}

/* 開放済み */
.tile.open {
  background: var(--tile-open);
  cursor: default;
  border-color: #111;
  animation: fadeOpen 0.12s ease-out;
}

@keyframes fadeOpen {
  from { opacity: 0.4; transform: scale(0.92); }
  to   { opacity: 1;   transform: scale(1); }
}

/* 数字カラー */
.tile.open.n1 { color: #4fc3f7; }
.tile.open.n2 { color: var(--green); }
.tile.open.n3 { color: var(--red); }
.tile.open.n4 { color: var(--purple); }
.tile.open.n5 { color: var(--orange); }
.tile.open.n6 { color: var(--cyan); }
.tile.open.n7 { color: #ff79c6; }
.tile.open.n8 { color: var(--white); }

/* フラグ */
.tile.flagged {
  background: #1a1208;
  border-color: var(--yellow);
  color: var(--yellow);
  text-shadow: 0 0 6px var(--yellow);
}

/* ゴール：ロック中（解錠前） */
.tile.goal-locked {
  background: #0a1a0a;
  border-color: #1a4a1a;
  color: #1a4a1a;
  cursor: not-allowed;
}

/* ゴール：解錠済み（押せる状態） */
.tile.goal-unlocked {
  background: #0a2010;
  color: var(--green);
  border-color: var(--green);
  text-shadow: 0 0 8px var(--green);
  cursor: pointer;
  position: relative;
  z-index: 2;
  animation: goalPulse 1.2s ease-in-out infinite;
}

@keyframes goalPulse {
  0%, 100% { box-shadow: 0 0 6px var(--green); }
  50%       { box-shadow: 0 0 22px var(--green), 0 0 40px #00ff0033; }
}

/* ゴール：開放済み（クリア） */
.tile.goal-open {
  background: #051a05;
  color: var(--green);
  border-color: var(--green);
  text-shadow: 0 0 10px var(--green);
  position: relative;
  z-index: 2;
  animation: goalBurst 0.6s ease-out, goalBreath 1.2s ease-in-out 0.6s infinite;
}

@keyframes goalBurst {
  0%   { background: #fff;        box-shadow: 0 0 0px  var(--green); transform: scale(1); }
  30%  { background: var(--green); box-shadow: 0 0 40px var(--green), 0 0 80px #00ff0066; transform: scale(1.3); }
  60%  { background: #0a3a0a;     box-shadow: 0 0 20px var(--green); transform: scale(1.1); }
  100% { background: #051a05;     box-shadow: 0 0 10px var(--green); transform: scale(1); }
}

@keyframes goalBreath {
  0%, 100% { box-shadow: 0 0 8px  var(--green); border-color: var(--green); }
  50%       { box-shadow: 0 0 26px var(--green), 0 0 48px #00ff0044; border-color: #80ffb0; }
}

/* ウェーブリング（ゴールマスに疑似要素で重ねる） */
.tile.goal-open::after {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: 50%;
  border: 2px solid var(--green);
  animation: goalWave 2.4s ease-out forwards;
  pointer-events: none;
}

@keyframes goalWave {
  0%   { transform: scale(1);   opacity: 1; }
  100% { transform: scale(6);   opacity: 0; }
}

/* 地雷ヒット */
.tile.mine-hit {
  background: #3a0010;
  color: var(--red);
  border-color: var(--red);
  animation: mineHit 0.4s ease-out;
}

@keyframes mineHit {
  0%   { transform: scale(1.3); background: #ff2d55; }
  100% { transform: scale(1);   background: #3a0010; }
}

/* ゲームオーバー時 全地雷表示 */
.tile.mine-revealed {
  background: #200010;
  color: #ff6080;
  border-color: #5a0020;
}

/* 重要ノード（開放後に表示） */
.tile.key-node-open {
  background: #001a1f;
  border-color: #00e5ff;
  color: #00e5ff;
  position: relative;
  z-index: 2;
  animation: keyNodeDiscover 0.5s ease-out, keyNodeBreath 2.4s ease-in-out 0.5s infinite;
}

/* 開放瞬間：白く閃光してシアンに収束 */
@keyframes keyNodeDiscover {
  0%   { background: #fff;    box-shadow: 0 0 0px  #00e5ff; transform: scale(1); }
  25%  { background: #aaffff; box-shadow: 0 0 30px #00e5ff; transform: scale(1.2); }
  60%  { background: #003a40; box-shadow: 0 0 16px #00e5ff; transform: scale(1.05); }
  100% { background: #001a1f; box-shadow: 0 0 10px #00e5ff; transform: scale(1); }
}

/* 開放後（常時）：光彩が呼吸するように強弱 */
@keyframes keyNodeBreath {
  0%, 100% { box-shadow: 0 0 6px  #00e5ff; border-color: #00e5ff; }
  50%       { box-shadow: 0 0 18px #00e5ff, 0 0 32px #00e5ff44; border-color: #80f0ff; }
}

/* クリア時の周辺タイル波及発光 */
.tile.clear-wave {
  animation: clearWaveGlow 0.6s ease-out forwards;
}

@keyframes clearWaveGlow {
  0%   { box-shadow: none; border-color: var(--border); }
  40%  { box-shadow: 0 0 14px var(--green); border-color: var(--green); background: #0a2a0a; }
  100% { box-shadow: none; border-color: var(--border); }
}

/* ---------- オーバーチャージ（パルス）演出 ---------- */
.tile.pulse-glow {
  animation: pulseGlow 0.5s ease-out;
}

@keyframes pulseGlow {
  0%   { box-shadow: 0 0 0px var(--cyan);  border-color: var(--cyan); }
  50%  { box-shadow: 0 0 18px var(--cyan); border-color: var(--cyan); background: #002a2e; }
  100% { box-shadow: 0 0 0px var(--cyan);  border-color: var(--border); }
}

/* ---------- フラッシュ演出 ---------- */
body.flash-red::after {
  content: '';
  position: fixed;
  inset: 0;
  background: rgba(255, 45, 85, 0.25);
  pointer-events: none;
  animation: flashFade 0.8s ease-out forwards;
  z-index: 10;
}

body.flash-green::after {
  content: '';
  position: fixed;
  inset: 0;
  background: rgba(57, 255, 20, 0.18);
  pointer-events: none;
  animation: flashFade 1s ease-out forwards;
  z-index: 10;
}

@keyframes flashFade {
  0%   { opacity: 1; }
  100% { opacity: 0; }
}

/* ---------- トースト通知 ---------- */
#toast {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(5, 16, 26, 0.92);
  border: 1px solid var(--cyan);
  color: var(--cyan);
  font-family: var(--font);
  font-size: clamp(0.65rem, 2vw, 0.8rem);
  letter-spacing: 0.12em;
  padding: 8px 20px;
  border-radius: 2px;
  box-shadow: 0 0 12px rgba(0, 245, 255, 0.3);
  white-space: nowrap;
  z-index: 15;
  animation: toastIn 0.2s ease-out;
}

#toast.hidden {
  display: none;
}

@keyframes toastIn {
  from { opacity: 0; transform: translateX(-50%) translateY(8px); }
  to   { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* ---------- オーバーレイ ---------- */
#overlay {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.82);
  backdrop-filter: blur(4px);
  z-index: 100;
  animation: overlayIn 0.3s ease-out;
}

#overlay.hidden {
  display: none;
}

@keyframes overlayIn {
  from { opacity: 0; transform: scale(0.95); }
  to   { opacity: 1; transform: scale(1); }
}

#overlay-box {
  text-align: center;
  border: 1px solid var(--cyan);
  background: #05101a;
  padding: 28px 36px;
  border-radius: 4px;
  box-shadow: 0 0 30px rgba(0, 245, 255, 0.3);
}

#overlay-title {
  font-size: clamp(1.3rem, 5vw, 1.9rem);
  letter-spacing: 0.2em;
  margin-bottom: 8px;
}

#overlay-title.win  { color: var(--green); text-shadow: 0 0 12px var(--green); }
#overlay-title.lose { color: var(--red);   text-shadow: 0 0 12px var(--red); }

#overlay-sub {
  font-size: 0.82rem;
  color: #a8c4d4;
  margin-bottom: 22px;
  letter-spacing: 0.1em;
}

#overlay-btns {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

#overlay-check {
  color: var(--green);
  border-color: var(--green);
}

#overlay-check:hover {
  background: rgba(57, 255, 20, 0.1);
  box-shadow: 0 0 10px rgba(57, 255, 20, 0.35);
}

/* ---------- ボタン共通 ---------- */
button {
  font-family: var(--font);
  font-size: 0.72rem;
  letter-spacing: 0.15em;
  color: var(--cyan);
  background: transparent;
  border: 1px solid var(--cyan);
  padding: 8px 18px;
  cursor: pointer;
  border-radius: 2px;
  transition: background 0.2s, box-shadow 0.2s;
}

button:hover {
  background: rgba(0, 245, 255, 0.1);
  box-shadow: 0 0 10px rgba(0, 245, 255, 0.35);
}

button:active {
  background: rgba(0, 245, 255, 0.2);
}

/* ---------- フッター ---------- */
#footer-btns button {
  font-size: clamp(0.60rem, 2.2vw, 0.72rem);
  padding: 6px 12px;
  letter-spacing: 0.10em;
  white-space: nowrap;
}

footer {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 8px 12px 16px;
  border-top: 1px solid #1e1e1e;
  background: #050505;
  /* スクロール時もフッターが見えるよう固定しない（ブラウザUIと干渉させない） */
}

#footer-btns {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 10px;
  width: 100%;
}

#guide {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px 18px;
  font-size: clamp(0.62rem, 1.8vw, 0.75rem);
  color: #a8bfcc;
  letter-spacing: 0.05em;
  padding-top: 4px;
}

#guide.hidden {
  display: none;
}

/* ---------- スキャンライン ---------- */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0,0,0,0.06) 2px,
    rgba(0,0,0,0.06) 4px
  );
  pointer-events: none;
  z-index: 0;
}

header, footer {
  position: relative;
  z-index: 10;
}

main {
  position: relative;
  z-index: 1;
}

/* ============================================================
   プレイヤー名表示（タイトル画面）
   ============================================================ */
#diff-player {
  font-family: var(--font);
  font-size: clamp(0.75rem, 2.5vw, 0.95rem);
  color: var(--cyan);
  letter-spacing: 0.15em;
  margin: 4px 0 12px;
}

#diff-footer-btns {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-top: 20px;
}

#diff-footer-btns button {
  font-family: var(--font);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  padding: 6px 18px;
  background: transparent;
  border: 1px solid #444;
  color: #9ab0bc;
  cursor: pointer;
  transition: all 0.2s;
}

#diff-footer-btns button:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  box-shadow: 0 0 8px rgba(0,245,255,0.2);
}

/* ============================================================
   オーバーレイ スコア表示
   ============================================================ */
#overlay-score {
  margin: 10px 0 4px;
  text-align: center;
}

.score-value {
  font-family: var(--font);
  font-size: clamp(1.6rem, 5vw, 2.4rem);
  color: var(--green);
  text-shadow: 0 0 16px var(--green);
  letter-spacing: 0.08em;
}

.score-unit {
  font-size: 0.55em;
  color: #80ffb0;
  margin-left: 4px;
}

.score-rank {
  font-family: var(--font);
  font-size: clamp(0.65rem, 2vw, 0.82rem);
  color: var(--yellow);
  letter-spacing: 0.15em;
  margin-top: 4px;
  text-shadow: 0 0 8px var(--yellow);
}

/* ============================================================
   モーダル共通
   ============================================================ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.82);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
}

.modal-overlay.hidden {
  display: none;
}

.modal-box {
  background: #0d1520;
  border: 1px solid var(--cyan);
  box-shadow: 0 0 30px rgba(0,245,255,0.15);
  padding: 28px 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  min-width: 280px;
  max-width: 90vw;
}

.modal-wide {
  min-width: 340px;
}

.modal-title {
  font-family: var(--font);
  font-size: clamp(0.9rem, 3vw, 1.1rem);
  color: var(--cyan);
  letter-spacing: 0.2em;
  text-shadow: 0 0 10px var(--cyan);
}

.modal-desc {
  font-family: var(--font);
  font-size: 0.72rem;
  color: #8ab8cc;
  letter-spacing: 0.08em;
}

.modal-error {
  font-family: var(--font);
  font-size: 0.72rem;
  color: var(--red);
  min-height: 1em;
  letter-spacing: 0.08em;
}

#player-input {
  font-family: var(--font);
  font-size: 0.9rem;
  letter-spacing: 0.12em;
  background: #050e18;
  border: 1px solid #2a4a5a;
  color: var(--cyan);
  padding: 8px 14px;
  width: 100%;
  box-sizing: border-box;
  outline: none;
  text-transform: uppercase;
}

#player-input:focus {
  border-color: var(--cyan);
  box-shadow: 0 0 8px rgba(0,245,255,0.2);
}

.modal-btn {
  font-family: var(--font);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  padding: 8px 24px;
  background: transparent;
  border: 1px solid var(--cyan);
  color: var(--cyan);
  cursor: pointer;
  transition: all 0.2s;
  margin-top: 4px;
}

.modal-btn:hover {
  background: rgba(0,245,255,0.08);
  box-shadow: 0 0 10px rgba(0,245,255,0.25);
}

/* ============================================================
   ランキングテーブル
   ============================================================ */
#rank-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 4px;
}

.rank-tab {
  font-family: var(--font);
  font-size: 0.70rem;
  letter-spacing: 0.12em;
  padding: 4px 14px;
  background: transparent;
  border: 1px solid #2a4a5a;
  color: #8ab8cc;
  cursor: pointer;
  transition: all 0.2s;
}

.rank-tab.active,
.rank-tab:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}

#ranking-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font);
  font-size: clamp(0.66rem, 2vw, 0.78rem);
  letter-spacing: 0.08em;
}

#ranking-table th {
  color: #8ab8cc;
  border-bottom: 1px solid #2a4a5a;
  padding: 6px 8px;
  text-align: left;
}

#ranking-table td {
  color: #b0c8d8;
  padding: 5px 8px;
  border-bottom: 1px solid #1a2a3a;
}

.rank-gold   td { color: var(--yellow); }
.rank-silver td { color: #b0c4d8; }
.rank-bronze td { color: #c87d4a; }

/* ============================================================
   スコア内訳テーブル
   ============================================================ */
.score-breakdown {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font);
  font-size: clamp(0.68rem, 2vw, 0.78rem);
  letter-spacing: 0.06em;
  margin-bottom: 6px;
}

.score-breakdown td {
  padding: 4px 6px;
}

.sb-label {
  text-align: left;
  color: #8ab4c8;
}

.sb-val {
  text-align: right;
  color: #c8e8f8;
  font-variant-numeric: tabular-nums;
  min-width: 64px;
}

.sb-val.neg {
  color: #ff7090;
}

.sb-note {
  text-align: left;
  color: #8ab4c8;
  font-size: 0.88em;
  padding-left: 6px;
}

.sb-divider {
  border-top: 1px solid #2a4a5a;
  margin: 6px 0 8px;
  width: 100%;
}

/* ============================================================
   フッターSCOREボタン（盤面確認モード時のみ表示）
   ============================================================ */
#footer-score-btn {
  border-color: #00e5ff;
  color: #00e5ff;
}

#footer-score-btn:hover {
  background: rgba(0, 229, 255, 0.15);
}

/* タイム表示（スコアと別枠） */
.score-time {
  font-family: var(--font);
  font-size: clamp(0.68rem, 2vw, 0.78rem);
  color: #7dcce0;
  letter-spacing: 0.12em;
  margin-top: 4px;
  text-align: center;
}

/* ============================================================
   サウンドトグルボタン
   ============================================================ */
.sound-btn {
  background: none;
  border: 1px solid #2a4a5a;
  border-radius: 4px;
  color: #7dcce0;
  font-size: clamp(0.75rem, 2.2vw, 0.9rem);
  padding: 2px 6px;
  cursor: pointer;
  line-height: 1;
  transition: border-color 0.2s, color 0.2s;
}

.sound-btn:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}

/* ============================================================
   シード入力（タイトル画面）
   ============================================================ */
#seed-input-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 12px auto 0;
  justify-content: center;
}

.seed-label {
  font-family: var(--font);
  font-size: 0.72rem;
  letter-spacing: 0.15em;
  color: #8ab8cc;
}

.seed-input-field {
  font-family: var(--font);
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  background: #050e18;
  border: 1px solid #2a4a5a;
  color: var(--cyan);
  padding: 5px 10px;
  width: 120px;
  text-align: center;
  outline: none;
  transition: border-color 0.2s;
}

.seed-input-field::placeholder {
  color: #3a5a6a;
  font-size: 0.72rem;
  letter-spacing: 0.05em;
}

.seed-input-field:focus {
  border-color: var(--cyan);
  box-shadow: 0 0 6px rgba(0,245,255,0.18);
}

.seed-random-btn {
  background: none;
  border: 1px solid #2a4a5a;
  border-radius: 4px;
  color: #8ab8cc;
  font-size: 1rem;
  padding: 4px 8px;
  cursor: pointer;
  transition: all 0.2s;
  line-height: 1;
}

.seed-random-btn:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}

/* ============================================================
   シード表示（ゲーム画面ヘッダー）
   ============================================================ */
.game-seed-display {
  font-family: var(--font);
  font-size: clamp(0.55rem, 1.5vw, 0.65rem);
  color: #6a8898;
  letter-spacing: 0.10em;
  white-space: nowrap;
}

/* ============================================================
   シード表示（クリア画面）
   ============================================================ */
.score-seed {
  font-family: var(--font);
  font-size: clamp(0.66rem, 2vw, 0.76rem);
  color: #8ab8cc;
  letter-spacing: 0.12em;
  margin-top: 6px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.seed-val {
  color: var(--cyan);
  letter-spacing: 0.15em;
}

.seed-copy-btn {
  background: none;
  border: 1px solid #2a4a5a;
  border-radius: 3px;
  color: #8ab8cc;
  font-size: 0.75rem;
  padding: 1px 5px;
  cursor: pointer;
  transition: all 0.2s;
  line-height: 1.4;
}

.seed-copy-btn:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}

/* ============================================================
   シード表示・コピー（ランキング）
   ============================================================ */
.rank-seed-cell {
  white-space: nowrap;
  color: #8ab8cc !important;
  font-size: 0.85em;
}

.rank-seed-copy {
  background: none;
  border: 1px solid #2a4a5a;
  border-radius: 3px;
  color: #8ab8cc;
  font-size: 0.72rem;
  padding: 1px 4px;
  cursor: pointer;
  margin-left: 4px;
  transition: all 0.2s;
  line-height: 1.4;
}

.rank-seed-copy:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}

/* ============================================================
   タイトル画面：名前横の設定ボタン
   ============================================================ */
.name-settings-btn {
  background: none;
  border: none;
  color: #7dcce0;
  font-size: 0.85em;
  cursor: pointer;
  padding: 0 0 0 6px;
  vertical-align: middle;
  opacity: 0.7;
  transition: opacity 0.2s, color 0.2s;
  line-height: 1;
}

.name-settings-btn:hover {
  opacity: 1;
  color: var(--cyan);
}

/* ============================================================
   サウンドメニュー（ポップアップ）
   ============================================================ */
#status-block {
  position: relative;
}

.sound-menu {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  background: #0a1a28;
  border: 1px solid #2a4a5a;
  border-radius: 4px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.6);
  z-index: 500;
  display: flex;
  flex-direction: column;
  min-width: 120px;
  overflow: hidden;
}

.sound-menu-btn {
  font-family: var(--font);
  font-size: 0.70rem;
  letter-spacing: 0.10em;
  background: none;
  border: none;
  border-bottom: 1px solid #1a3a4a;
  color: #a8c4d4;
  padding: 8px 14px;
  cursor: pointer;
  text-align: left;
  transition: background 0.15s, color 0.15s;
  white-space: nowrap;
}

.sound-menu-btn:last-child {
  border-bottom: none;
}

.sound-menu-btn:hover {
  background: rgba(0,245,255,0.08);
  color: var(--cyan);
}

/* ============================================================
   ゲームオーバー統計タイトル
   ============================================================ */
.go-stats-title {
  font-family: var(--font);
  font-size: 0.72rem;
  color: #8ab8cc;
  letter-spacing: 0.2em;
  margin-bottom: 6px;
  text-align: center;
}