:root {
  --bg: #050b1a;
  --bg2: #0a1428;
  --panel: rgba(0,220,190,0.05);
  --panel-hover: rgba(0,220,190,0.10);
  --border: rgba(0,220,190,0.25);
  --border2: rgba(0,220,190,0.10);
  --text: #c8e0f8;
  --text-dim: #3a5a7a;
  --text-mid: #6a9ab8;
  --accent: #00dcc0;
  --accent2: #00ffcc;
  --amber: #f59e0b;
  --error: #f43f5e;
  --success: #10b981;
  --gold: #fbbf24;
  --font-mono: 'Share Tech Mono','Courier New',monospace;
  --font-ja: 'Noto Sans JP','Hiragino Sans','Yu Gothic',sans-serif;
}

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

html, body {
  height: 100%;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-ja);
}

body::after {
  content: '';
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 3px,
    rgba(0,0,0,.06) 3px,
    rgba(0,0,0,.06) 4px
  );
  pointer-events: none;
  z-index: 9999;
}

.bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,220,190,.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,220,190,.025) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
  z-index: 0;
}

/* ============================================================
   LOADING
   ============================================================ */
#scr-loading {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
  background: var(--bg);
}

.loading-logo {
  font-family: var(--font-mono);
  font-size: 32px;
  color: var(--accent);
  letter-spacing: 6px;
  animation: glow 2s ease-in-out infinite;
}

.loading-bar-wrap {
  width: 200px;
  height: 2px;
  background: rgba(255,255,255,.05);
}

.loading-bar {
  height: 100%;
  background: var(--accent);
  width: 0%;
  transition: width .3s;
  box-shadow: 0 0 8px rgba(0,220,190,.6);
}

.loading-msg {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-dim);
  letter-spacing: 3px;
}

.loading-err {
  font-size: 13px;
  color: var(--error);
  max-width: 460px;
  text-align: center;
  line-height: 1.9;
  padding: 20px;
  border: 1px solid rgba(244,63,94,.3);
  background: rgba(244,63,94,.05);
}

.loading-err code {
  background: rgba(255,255,255,.06);
  padding: 2px 6px;
  font-family: var(--font-mono);
  font-size: 12px;
}

/* ============================================================
   SCREENS
   ============================================================ */
.screen {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 10;
  flex-direction: column;
  overflow: hidden;
}

.screen.active { display: flex; }

/* ============================================================
   TITLE
   ============================================================ */
#scr-title {
  align-items: center;
  justify-content: center;
  gap: 18px;
  text-align: center;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 20px 16px;
}

.title-eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent);
  letter-spacing: 6px;
  text-transform: uppercase;
  opacity: 0.6;
}

.title-logo {
  font-family: var(--font-mono);
  font-size: clamp(28px, 6vw, 64px);
  color: var(--accent);
  letter-spacing: 6px;
  text-shadow: 0 0 24px rgba(0,220,190,.7), 0 0 50px rgba(0,220,190,.3);
  animation: glow 3s ease-in-out infinite;
}

@keyframes glow {
  0%, 100% { text-shadow: 0 0 24px rgba(0,220,190,.7), 0 0 50px rgba(0,220,190,.3); }
  50%       { text-shadow: 0 0 36px rgba(0,220,190,1), 0 0 70px rgba(0,220,190,.5), 0 0 120px rgba(0,220,190,.15); }
}

.title-sub {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-mid);
  letter-spacing: 4px;
}

.title-meta {
  display: flex;
  gap: 20px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-dim);
  flex-wrap: wrap;
  justify-content: center;
}

.title-meta span::before { content: '[ '; color: var(--accent); opacity: .5; }
.title-meta span::after  { content: ' ]'; color: var(--accent); opacity: .5; }

.title-catch {
  font-family: var(--font-ja);
  font-size: clamp(12px, 2.5vw, 14px);
  color: var(--text-mid);
  line-height: 1.8;
  text-align: center;
  max-width: 360px;
  margin-top: -6px;
}

.title-btns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  width: min(480px, 90vw);
}

/* --- Title buttons --- */
.tbtn {
  background: rgba(0,220,190,0.06);
  border: 1px solid rgba(0,220,190,0.30);
  color: var(--text);
  padding: 18px 16px;
  cursor: pointer;
  transition: background .15s, border-color .15s, transform .15s, box-shadow .15s;
  text-align: left;
  font-family: var(--font-ja);
  position: relative;
  overflow: hidden;
  user-select: none;
}

.tbtn:hover {
  background: rgba(0,220,190,0.12);
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: 0 8px 28px rgba(0,220,190,.20);
}

.tbtn:active {
  transform: translateY(-1px) scale(0.99);
  background: rgba(0,220,190,0.18);
  box-shadow: 0 3px 12px rgba(0,220,190,.15);
}

/* --- Primary (学習モード) CTA --- */
.tbtn-primary {
  grid-column: span 2;
  border-color: var(--accent);
  background: rgba(0,220,190,0.10);
  border-width: 1.5px;
}
.tbtn-primary .tbtn-label { color: var(--accent2); font-size: 16px; }
.tbtn-primary:hover { box-shadow: 0 10px 36px rgba(0,220,190,.30); }

/* ハイスコアは1列 */
.tbtn-score {
  grid-column: span 2;
}

.tbtn-icon {
  display: block;
  margin-bottom: 8px;
  width: 20px;
  height: 20px;
  color: var(--accent);
}
.tbtn-icon svg {
  width: 100%;
  height: 100%;
}
.tbtn-label { font-size: 15px; font-weight: 700; display: block; color: var(--accent); }
.tbtn-desc  { font-size: 11px; color: var(--text-mid); margin-top: 3px; display: block; }

/* ============================================================
   MODE SELECT
   ============================================================ */
#scr-mode {
  align-items: center;
  justify-content: center;
  gap: 28px;
  overflow: hidden;
  padding: 60px 16px 20px;
}

.mode-header { text-align: center; }

.mode-header h2 {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 5px;
  color: var(--text-dim);
  text-transform: uppercase;
  margin-bottom: 6px;
}

.mode-header p { font-size: 13px; color: var(--text-mid); }

.diff-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
}

/* --- Difficulty buttons --- */
.dbtn {
  padding: 12px 24px;
  border: 1px solid rgba(0,220,190,0.30);
  background: rgba(0,220,190,0.05);
  color: var(--text);
  font-family: var(--font-ja);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background .15s, border-color .15s, color .15s, transform .15s, box-shadow .15s;
  user-select: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  min-width: 90px;
}

.dbtn-sub {
  font-size: 10px;
  font-weight: 400;
  color: var(--text-dim);
  font-family: var(--font-mono);
  letter-spacing: 0.5px;
}

.dbtn:hover {
  background: rgba(0,220,190,0.12);
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 5px 18px rgba(0,220,190,.15);
}

.dbtn:hover .dbtn-sub { color: var(--text-mid); }

.dbtn:active {
  transform: translateY(0);
  box-shadow: none;
}

.dbtn[data-d="1"].sel {
  border-color: var(--success);
  color: var(--success);
  background: rgba(16,185,129,.12);
  box-shadow: 0 0 16px rgba(16,185,129,.15);
}

.dbtn[data-d="2"].sel {
  border-color: var(--amber);
  color: var(--amber);
  background: rgba(245,158,11,.10);
  box-shadow: 0 0 16px rgba(245,158,11,.12);
}

.dbtn[data-d="3"].sel {
  border-color: var(--error);
  color: var(--error);
  background: rgba(244,63,94,.10);
  box-shadow: 0 0 16px rgba(244,63,94,.12);
}

.dbtn[data-d="0"].sel {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(0,220,190,.10);
  box-shadow: 0 0 16px rgba(0,220,190,.12);
}

.diff-info {
  background: var(--panel);
  border: 1px solid var(--border2);
  padding: 14px 20px;
  max-width: 440px;
  width: 90%;
  font-size: 13px;
  color: var(--text-mid);
  line-height: 1.7;
  text-align: center;
  min-height: 60px;
}

/* --- Start button --- */
.start-btn {
  padding: 16px 56px;
  background: var(--accent);
  border: 2px solid var(--accent);
  color: var(--bg);
  font-family: var(--font-ja);
  font-size: 17px;
  font-weight: 900;
  cursor: pointer;
  letter-spacing: 3px;
  transition: background .15s, transform .15s, box-shadow .15s;
  user-select: none;
}

.start-btn:hover {
  background: var(--accent2);
  border-color: var(--accent2);
  transform: translateY(-3px);
  box-shadow: 0 10px 36px rgba(0,220,190,.40);
}

.start-btn:active {
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(0,220,190,.25);
  filter: brightness(0.92);
}

/* --- Back button --- */
.btn-back {
  position: fixed;
  top: 16px;
  left: 16px;
  background: rgba(0,220,190,0.06);
  border: 1px solid var(--border);
  color: var(--text-mid);
  padding: 9px 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 2px;
  cursor: pointer;
  transition: all .15s;
  z-index: 100;
  user-select: none;
}

.btn-back:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(0,220,190,.10);
}

.btn-back:active {
  transform: scale(0.97);
  filter: brightness(0.9);
}

/* --- Home button (always visible) --- */
#btn-home {
  position: fixed;
  top: 16px;
  right: 16px;
  background: rgba(0,220,190,0.06);
  border: 1px solid var(--border);
  color: var(--text-mid);
  padding: 9px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 2px;
  cursor: pointer;
  transition: all .15s;
  z-index: 200;
  display: none;
  user-select: none;
}

#btn-home:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(0,220,190,.10);
}

#btn-home:active {
  transform: scale(0.97);
}

/* ============================================================
   GAME HUD
   ============================================================ */
.hud {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 20px;
  border-bottom: 1px solid var(--border2);
  background: rgba(5,11,26,.9);
  backdrop-filter: blur(8px);
  flex-shrink: 0;
  gap: 8px;
}

.hud-grp { display: flex; align-items: center; gap: 16px; }

.hud-it { text-align: center; min-width: 60px; }

.hud-lbl {
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--text-dim);
  letter-spacing: 3px;
  text-transform: uppercase;
  display: block;
}

.hud-val {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: bold;
  color: var(--accent);
  line-height: 1;
}

.hud-val.timer { color: var(--text); transition: color .3s; }
.hud-val.timer.warn   { color: var(--amber); }
.hud-val.timer.danger { color: var(--error); animation: pulse .5s infinite; }

@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: .4; } }

.combo-val {
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: bold;
  transition: color .3s;
}

.combo-val.c0 { color: var(--text-mid); }
.combo-val.c1 { color: var(--success); }
.combo-val.c2 { color: var(--amber); }
.combo-val.c3 { color: #f97316; }
.combo-val.c4 { color: var(--error); }

.combo-bump { animation: bump .15s ease-out; }
@keyframes bump { 0% { transform: scale(1.6); } 100% { transform: scale(1); } }

.lives { display: flex; gap: 4px; align-items: center; }
.life { font-size: 18px; transition: all .3s; }
.life.lost { filter: grayscale(1); opacity: .25; }

/* ============================================================
   GAME MAIN
   ============================================================ */
.prog-wrap { height: 2px; background: rgba(255,255,255,.04); flex-shrink: 0; }
.prog-bar  {
  height: 100%;
  background: var(--accent);
  transition: width .4s ease;
  box-shadow: 0 0 8px rgba(0,220,190,.6);
}

.game-main {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 16px;
  gap: 20px;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

/* --- Element card --- */
.el-card {
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 20px 28px;
  width: 100%;
  max-width: 560px;
  position: relative;
  transition: border-color .2s;
  flex-shrink: 0;
}

.el-card.diff1 { border-left: 3px solid rgba(16,185,129,.5); }
.el-card.diff2 { border-left: 3px solid rgba(245,158,11,.5); }
.el-card.diff3 { border-left: 3px solid rgba(244,63,94,.5); }

.el-card.shake { animation: shake .3s ease-out; }
@keyframes shake {
  0%   { transform: translateX(0); }
  20%  { transform: translateX(-8px); }
  40%  { transform: translateX(8px); }
  60%  { transform: translateX(-4px); }
  80%  { transform: translateX(4px); }
  100% { transform: translateX(0); }
}

.el-card.flash { animation: flash .35s ease-out; }
@keyframes flash {
  0%, 100% { box-shadow: none; }
  50%       { box-shadow: 0 0 32px rgba(16,185,129,.4); border-color: var(--success); }
}

.card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
}

.card-no {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-dim);
}

.card-type {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 3px;
  text-transform: uppercase;
  padding: 3px 8px;
  border: 1px solid;
}

.card-type.t-name   { color: var(--success); border-color: rgba(16,185,129,.3); }
.card-type.t-symbol { color: var(--amber);   border-color: rgba(245,158,11,.3); }
.card-type.t-trivia { color: #a78bfa;        border-color: rgba(167,139,250,.3); }

.q-content {
  text-align: center;
  min-height: 70px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.q-symbol {
  font-family: var(--font-mono);
  font-size: 56px;
  color: var(--accent);
  text-shadow: 0 0 20px rgba(0,220,190,.4);
  line-height: 1;
}

.q-name {
  font-size: clamp(24px, 4vw, 36px);
  font-weight: 900;
  color: var(--text);
}

.q-trivia {
  font-size: 16px;
  color: var(--text);
  line-height: 1.6;
  max-width: 420px;
}

.q-atno {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-dim);
  margin-top: 2px;
}

.hints {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border2);
}

.hint-pill {
  font-size: 12px;
  padding: 3px 10px;
  border: 1px solid rgba(255,255,255,.08);
  color: var(--text-dim);
  transition: all .3s;
}

.hint-pill.shown { color: var(--text-mid); border-color: var(--border); }
.score-possible  { font-family: var(--font-mono); font-size: 11px; color: var(--gold); opacity: .8; }

/* --- Typing area --- */
.typing-area {
  width: 100%;
  max-width: 560px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex-shrink: 0;
}

.romaji-guide {
  font-family: var(--font-mono);
  font-size: clamp(24px, 4vw, 36px);
  text-align: center;
  letter-spacing: 4px;
  min-height: 44px;
  user-select: none;
}

.rt { color: var(--text-dim); }
.rc { color: var(--accent); text-shadow: 0 0 12px rgba(0,220,190,.8); animation: cblink 1s steps(1) infinite; }
.rr { color: var(--text); }

@keyframes cblink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }

.romaji-guide.err .rc {
  color: var(--error);
  text-shadow: 0 0 12px rgba(244,63,94,.8);
  animation: none;
}

.inp-wrap { position: relative; }

.typing-inp {
  width: 100%;
  background: rgba(255,255,255,.02);
  border: 1px solid var(--border);
  color: transparent;
  caret-color: transparent;
  font-family: var(--font-mono);
  font-size: 20px;
  padding: 14px 20px;
  outline: none;
  text-align: center;
  letter-spacing: 4px;
}

.typing-inp:focus {
  border-color: var(--accent);
  box-shadow: 0 0 16px rgba(0,220,190,.1);
}

.typing-inp.err {
  border-color: var(--error);
  box-shadow: 0 0 16px rgba(244,63,94,.15);
}

.inp-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  font-family: var(--font-mono);
  font-size: 20px;
  letter-spacing: 4px;
  color: var(--accent);
}

.typing-hint {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  padding: 0 2px;
}

.hint-keys {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-dim);
}

/* ============================================================
   EFFECTS
   ============================================================ */
.score-pop {
  position: fixed;
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: bold;
  color: var(--success);
  pointer-events: none;
  z-index: 500;
  animation: scoreup .9s ease-out forwards;
}

@keyframes scoreup {
  0%   { transform: translateY(0);    opacity: 1; }
  100% { transform: translateY(-60px); opacity: 0; }
}

.combo-burst {
  position: fixed;
  font-family: var(--font-mono);
  font-size: clamp(28px, 5vw, 48px);
  font-weight: bold;
  pointer-events: none;
  z-index: 500;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-shadow: 0 0 24px currentColor;
  animation: burst .7s ease-out forwards;
}

@keyframes burst {
  0%   { transform: translate(-50%,-50%) scale(.3);  opacity: 1; }
  60%  { transform: translate(-50%,-50%) scale(1.2); opacity: 1; }
  100% { transform: translate(-50%,-50%) scale(1);   opacity: 0; }
}

/* ============================================================
   RESULT
   ============================================================ */
#scr-result {
  align-items: center;
  justify-content: flex-start;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 20px 16px;
}

.result-inner {
  width: 100%;
  max-width: 640px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  padding-bottom: 24px;
}

.result-title {
  font-family: var(--font-mono);
  font-size: clamp(24px, 5vw, 40px);
  color: var(--accent);
  letter-spacing: 6px;
  text-align: center;
  text-shadow: 0 0 20px rgba(0,220,190,.5);
}

.result-mode {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-dim);
  letter-spacing: 3px;
  text-align: center;
}

.result-score {
  font-family: var(--font-mono);
  font-size: clamp(48px, 8vw, 80px);
  font-weight: bold;
  color: var(--gold);
  text-shadow: 0 0 30px rgba(251,191,36,.4);
  text-align: center;
}

.result-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  width: 100%;
}

.stat-box {
  background: var(--panel);
  border: 1px solid var(--border2);
  padding: 14px;
  text-align: center;
}

.stat-lbl {
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--text-dim);
  letter-spacing: 2px;
  text-transform: uppercase;
  display: block;
}

.stat-val {
  font-family: var(--font-mono);
  font-size: 26px;
  color: var(--text);
}

/* --- Periodic table grid --- */
.pt-section { width: 100%; }

.pt-title {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-dim);
  letter-spacing: 3px;
  margin-bottom: 10px;
}

.pt-grid {
  display: grid;
  grid-template-columns: repeat(18, 1fr);
  gap: 2px;
  width: 100%;
}

.pt-cell {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: clamp(5px, .9vw, 10px);
  border: 1px solid transparent;
  cursor: default;
}

.pt-cell.unseen  { background: rgba(255,255,255,.02); border-color: rgba(255,255,255,.04); color: var(--text-dim); opacity: .5; }
.pt-cell.perfect { background: rgba(16,185,129,.15);  border-color: rgba(16,185,129,.4);  color: var(--success); }
.pt-cell.good    { background: rgba(245,158,11,.10);  border-color: rgba(245,158,11,.35); color: var(--amber); }
.pt-cell.struggle{ background: rgba(244,63,94,.10);   border-color: rgba(244,63,94,.3);   color: var(--error); }
.pt-cell.gap     { background: transparent; border-color: transparent; }

.pt-legend { display: flex; gap: 16px; margin-top: 8px; flex-wrap: wrap; }

.legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-dim);
}

.legend-dot { width: 10px; height: 10px; border: 1px solid; }
.legend-dot.p { background: rgba(16,185,129,.15); border-color: rgba(16,185,129,.4); }
.legend-dot.g { background: rgba(245,158,11,.10); border-color: rgba(245,158,11,.35); }
.legend-dot.s { background: rgba(244,63,94,.10);  border-color: rgba(244,63,94,.3); }
.legend-dot.u { background: rgba(255,255,255,.02); border-color: rgba(255,255,255,.04); }

/* --- Result action buttons --- */
.result-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

.rbtn {
  padding: 13px 26px;
  border: 1px solid rgba(0,220,190,0.28);
  background: rgba(0,220,190,0.05);
  color: var(--text);
  font-family: var(--font-ja);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all .15s;
  user-select: none;
}

.rbtn:hover {
  background: rgba(0,220,190,0.12);
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 5px 18px rgba(0,220,190,.15);
}

.rbtn:active {
  transform: translateY(0);
  box-shadow: none;
}

.rbtn.primary {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
  font-weight: 900;
}

.rbtn.primary:hover {
  background: var(--accent2);
  border-color: var(--accent2);
  color: var(--bg);
}

.rbtn.tweet {
  background: rgba(0,0,0,.50);
  border-color: rgba(255,255,255,.20);
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
}

.rbtn.tweet:hover {
  background: #000;
  border-color: var(--text);
  color: #fff;
  transform: translateY(-2px);
}

.rbtn.tweet svg { width: 16px; height: 16px; fill: currentColor; flex-shrink: 0; }

/* --- High score badge --- */
.hs-badge {
  background: rgba(251,191,36,.08);
  border: 1px solid rgba(251,191,36,.3);
  padding: 10px 20px;
  text-align: center;
  width: 100%;
}

.hs-badge-lbl {
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--gold);
  letter-spacing: 3px;
  text-transform: uppercase;
  display: block;
  margin-bottom: 4px;
}

.hs-badge-val { font-family: var(--font-mono); font-size: 22px; color: var(--gold); }
.hs-badge-val.new { color: var(--accent2); animation: glow 1s ease-in-out infinite; }

/* ============================================================
   PRACTICE CARD
   ============================================================ */
.practice-overlay {
  position: fixed;
  inset: 0;
  background: rgba(5,11,26,.96);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadein .2s ease;
}

@keyframes fadein { from { opacity: 0; } to { opacity: 1; } }

.practice-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  padding: 28px;
  max-width: 440px;
  width: 90%;
  text-align: center;
}

.pc-status { font-family: var(--font-mono); font-size: 14px; margin-bottom: 14px; }
.pc-status.ok   { color: var(--success); }
.pc-status.skip { color: var(--text-dim); }

.pc-atno   { font-family: var(--font-mono); font-size: 11px; color: var(--text-dim); letter-spacing: 2px; }
.pc-sym    { font-family: var(--font-mono); font-size: 60px; color: var(--accent); text-shadow: 0 0 20px rgba(0,220,190,.4); line-height: 1; margin: 6px 0; }
.pc-ja     { font-size: 26px; font-weight: 900; color: var(--text); }
.pc-hira   { font-size: 16px; color: var(--text-mid); letter-spacing: 2px; margin: 4px 0; }
.pc-romaji { font-family: var(--font-mono); font-size: 18px; color: var(--accent); letter-spacing: 3px; margin: 4px 0; }
.pc-trivia {
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.7;
  padding: 10px;
  background: rgba(255,255,255,.02);
  border: 1px solid var(--border2);
  margin: 10px 0;
}

.pc-next {
  padding: 12px 36px;
  background: var(--accent);
  border: 2px solid var(--accent);
  color: var(--bg);
  font-family: var(--font-ja);
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  transition: all .15s;
  user-select: none;
}

.pc-next:hover {
  background: var(--accent2);
  border-color: var(--accent2);
  transform: translateY(-2px);
}

.pc-next:active {
  transform: translateY(0);
  filter: brightness(0.9);
}

/* ============================================================
   HIGH SCORE MODAL
   ============================================================ */
.hs-modal {
  position: fixed;
  inset: 0;
  background: rgba(5,11,26,.97);
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hs-inner {
  background: var(--bg2);
  border: 1px solid var(--border);
  padding: 28px;
  max-width: 480px;
  width: 90%;
  max-height: 80vh;
  overflow-y: auto;
}

.hs-title {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--accent);
  letter-spacing: 4px;
  margin-bottom: 20px;
  text-align: center;
}

.hs-table { width: 100%; border-collapse: collapse; }

.hs-table th {
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--text-dim);
  letter-spacing: 2px;
  text-align: left;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border2);
}

.hs-table td {
  font-family: var(--font-mono);
  font-size: 14px;
  padding: 6px 0;
  color: var(--text-mid);
  border-bottom: 1px solid var(--border2);
}

.hs-table td:last-child { color: var(--gold); text-align: right; }

.hs-table tr.hs-section td {
  font-size: 10px;
  color: var(--accent);
  letter-spacing: 2px;
  padding-top: 14px;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--border);
}

.hs-close {
  margin-top: 20px;
  display: block;
  width: 100%;
  padding: 12px;
  background: rgba(0,220,190,0.05);
  border: 1px solid var(--border);
  color: var(--text-mid);
  font-family: var(--font-mono);
  font-size: 12px;
  cursor: pointer;
  letter-spacing: 2px;
  transition: all .15s;
}

.hs-close:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(0,220,190,0.10);
}

.hs-reset-btn {
  margin-top: 10px;
  display: block;
  width: 100%;
  padding: 8px;
  background: transparent;
  border: 1px solid rgba(244,63,94,.3);
  color: var(--error);
  font-family: var(--font-mono);
  font-size: 10px;
  cursor: pointer;
  letter-spacing: 2px;
  transition: all .15s;
}

.hs-reset-btn:hover {
  background: rgba(244,63,94,.08);
  border-color: var(--error);
}

/* ============================================================
   SOUND TOGGLE
   ============================================================ */
#sound-toggle {
  position: fixed;
  bottom: 16px;
  right: 16px;
  background: rgba(0,220,190,0.05);
  border: 1px solid var(--border2);
  color: var(--text-dim);
  width: 36px;
  height: 36px;
  font-size: 16px;
  cursor: pointer;
  transition: all .15s;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  user-select: none;
}

#sound-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(0,220,190,.10);
}

/* ============================================================
   HUD — HOME BUTTON INSIDE HUD (overlap fix)
   ============================================================ */
#scr-game #btn-home { display: none !important; }

.hud-right {
  gap: 10px;
  align-items: center;
}

.hud-home-btn {
  background: rgba(0,220,190,0.06);
  border: 1px solid var(--border);
  color: var(--text-dim);
  width: 32px;
  height: 32px;
  font-size: 16px;
  cursor: pointer;
  transition: all .15s;
  display: flex;
  align-items: center;
  justify-content: center;
  user-select: none;
  flex-shrink: 0;
  margin-left: 6px;
}

.hud-home-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(0,220,190,.12);
}

.hud-home-btn:active {
  transform: scale(0.94);
}

/* ============================================================
   BATTLE OPPONENT PANEL
   ============================================================ */
.battle-opp-panel {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 20px;
  background: rgba(244,63,94,.04);
  border-bottom: 1px solid rgba(244,63,94,.15);
  font-family: var(--font-mono);
  font-size: 12px;
  flex-shrink: 0;
  flex-wrap: nowrap;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.battle-opp-panel::-webkit-scrollbar { display: none; }

.opp-label {
  color: var(--error);
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  opacity: .8;
  white-space: nowrap;
}

.opp-sep { color: var(--text-dim); opacity: .4; flex-shrink: 0; }

.opp-meta-lbl {
  color: var(--text-dim);
  font-size: 9px;
  letter-spacing: 1px;
  white-space: nowrap;
}

.opp-element {
  color: var(--accent);
  font-size: 15px;
  font-weight: bold;
  min-width: 28px;
  white-space: nowrap;
}

.opp-score {
  color: var(--gold);
  font-size: 16px;
  font-weight: bold;
  min-width: 48px;
  white-space: nowrap;
}

.opp-combo {
  color: var(--success);
  font-size: 13px;
  white-space: nowrap;
}

.opp-count {
  color: var(--text);
  font-size: 14px;
  min-width: 24px;
  white-space: nowrap;
}

/* ============================================================
   NICKNAME INPUT (Battle Lobby)
   ============================================================ */
.nickname-row {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  max-width: 420px;
  background: rgba(0,220,190,.04);
  border: 1px solid var(--border2);
  padding: 10px 16px;
}

.nickname-lbl {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-dim);
  letter-spacing: 2px;
  white-space: nowrap;
}

.nickname-inp {
  flex: 1;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--border);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 15px;
  padding: 4px 6px;
  outline: none;
  letter-spacing: 2px;
  min-width: 0;
}

.nickname-inp:focus {
  border-bottom-color: var(--accent2);
}

.nickname-inp::placeholder {
  color: var(--text-dim);
}

.wp-host-tag {
  font-size: 9px;
  color: var(--text-dim);
  letter-spacing: 1px;
  margin-left: 4px;
  vertical-align: middle;
}

/* ============================================================
   BATTLE LOBBY SCREEN
   ============================================================ */
#scr-battle {
  align-items: center;
  justify-content: flex-start;
  overflow-y: auto;
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
  padding: 72px 16px 40px;
}

.battle-lobby {
  width: 100%;
  max-width: 700px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 22px;
}

.battle-lobby-title {
  font-family: var(--font-mono);
  font-size: clamp(20px, 4vw, 32px);
  color: var(--accent);
  letter-spacing: 4px;
  text-shadow: 0 0 20px rgba(0,220,190,.5);
  padding-top: 8px;
}

.battle-lobby-sub {
  font-size: 13px;
  color: var(--text-mid);
  text-align: center;
}

.battle-tbtn .tbtn-label { color: #f97316; }
.battle-tbtn { border-color: rgba(249,115,22,.30); }
.battle-tbtn:hover { border-color: #f97316; box-shadow: 0 8px 28px rgba(249,115,22,.18); }

/* Two-panel layout */
.battle-panels {
  display: flex;
  gap: 20px;
  width: 100%;
  align-items: flex-start;
  flex-wrap: wrap;
}

.battle-panel {
  flex: 1;
  min-width: 240px;
  background: var(--panel);
  border: 1px solid var(--border);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.battle-panel-title {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent);
  letter-spacing: 2px;
}

.battle-panel-desc {
  font-size: 12px;
  color: var(--text-dim);
  line-height: 1.6;
}

.battle-separator {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-dim);
  letter-spacing: 3px;
  padding: 12px 0;
  align-self: center;
}

/* Room code display */
.room-code-display {
  background: rgba(0,220,190,.04);
  border: 1px solid var(--border);
  padding: 14px;
  text-align: center;
  margin-top: 4px;
}

.room-code-label {
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--text-dim);
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.room-code-value {
  font-family: var(--font-mono);
  font-size: clamp(18px, 3vw, 28px);
  color: var(--accent2);
  letter-spacing: 6px;
  word-break: break-all;
  margin-bottom: 10px;
}

.copy-btn {
  padding: 6px 18px;
  background: rgba(0,220,190,.08);
  border: 1px solid var(--border);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 2px;
  cursor: pointer;
  transition: all .15s;
}

.copy-btn:hover {
  background: rgba(0,220,190,.16);
  border-color: var(--accent);
}

/* Join input */
.room-code-input {
  width: 100%;
  background: rgba(255,255,255,.02);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 22px;
  padding: 11px 14px;
  outline: none;
  letter-spacing: 6px;
  text-align: center;
}

.room-code-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 12px rgba(0,220,190,.1);
}

/* Status message */
.battle-status {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-mid);
  letter-spacing: 2px;
  text-align: center;
  min-height: 20px;
  padding: 4px 0;
}

.battle-status.ok   { color: var(--success); }
.battle-status.wait { color: var(--amber); animation: pulse .8s ease-in-out infinite; }
.battle-status.err  { color: var(--error); }

/* How-to */
.battle-howto {
  background: rgba(255,255,255,.02);
  border: 1px solid var(--border2);
  padding: 12px 18px;
  font-size: 12px;
  color: var(--text-dim);
  line-height: 1.7;
  width: 100%;
  text-align: center;
}

.howto-title {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-mid);
  letter-spacing: 2px;
  text-transform: uppercase;
  display: block;
  margin-bottom: 6px;
}

/* ============================================================
   COUNTDOWN
   ============================================================ */
.battle-countdown {
  position: fixed;
  inset: 0;
  background: rgba(5,11,26,.95);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  z-index: 150;
}

.countdown-label {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--text-dim);
  letter-spacing: 6px;
}

.countdown-num {
  font-family: var(--font-mono);
  font-size: clamp(72px, 16vw, 144px);
  color: var(--accent);
  text-shadow: 0 0 40px rgba(0,220,190,.6), 0 0 80px rgba(0,220,190,.3);
  animation: countglow 1s ease-in-out;
  line-height: 1;
}

@keyframes countglow {
  0%   { transform: scale(1.4); opacity: 0; }
  30%  { transform: scale(1.1); opacity: 1; }
  100% { transform: scale(1);   opacity: 1; }
}

/* ============================================================
   BATTLE RESULT OVERLAY
   ============================================================ */
.battle-result-overlay {
  position: fixed;
  inset: 0;
  background: rgba(5,11,26,.96);
  z-index: 400;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadein .3s ease;
}

.br-inner {
  background: var(--bg2);
  border: 1px solid var(--border);
  padding: 36px 28px;
  max-width: 560px;
  width: 90%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

.br-verdict {
  font-family: var(--font-mono);
  font-size: clamp(24px, 5vw, 40px);
  letter-spacing: 4px;
  text-align: center;
}

.br-verdict.win  { color: var(--gold); text-shadow: 0 0 24px rgba(251,191,36,.5); }
.br-verdict.lose { color: var(--error); text-shadow: 0 0 24px rgba(244,63,94,.4); }
.br-verdict.draw { color: var(--accent); text-shadow: 0 0 24px rgba(0,220,190,.4); }

.br-scores {
  display: flex;
  align-items: center;
  gap: 20px;
  width: 100%;
}

.br-score-box {
  flex: 1;
  background: var(--panel);
  border: 1px solid var(--border2);
  padding: 16px;
  text-align: center;
}

.br-score-box.mine { border-color: rgba(0,220,190,.3); }
.br-score-box.opp  { border-color: rgba(244,63,94,.2); }

.br-slabel {
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--text-dim);
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.br-sval {
  font-family: var(--font-mono);
  font-size: clamp(24px, 5vw, 36px);
  color: var(--gold);
  font-weight: bold;
}

.br-smeta {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-dim);
  margin-top: 6px;
}

.br-vs {
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--text-dim);
  flex-shrink: 0;
}

.br-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

/* ============================================================
   SHARE BUTTONS (LINE / X)
   ============================================================ */
.share-btns {
  display: flex;
  gap: 8px;
  margin-top: 10px;
  flex-wrap: wrap;
  justify-content: center;
}

.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid;
  cursor: pointer;
  transition: all .15s;
  user-select: none;
  letter-spacing: 1px;
}

.share-btn svg { width: 14px; height: 14px; flex-shrink: 0; }

.share-line {
  background: rgba(6,199,85,.08);
  border-color: rgba(6,199,85,.35);
  color: #06c755;
}
.share-line:hover {
  background: rgba(6,199,85,.18);
  border-color: #06c755;
  transform: translateY(-2px);
}

.share-x {
  background: rgba(255,255,255,.04);
  border-color: rgba(255,255,255,.2);
  color: var(--text);
}
.share-x:hover {
  background: rgba(255,255,255,.10);
  border-color: var(--text);
  transform: translateY(-2px);
}

/* ============================================================
   WAITING ROOM
   ============================================================ */
.waiting-room {
  margin-top: 12px;
  background: rgba(0,220,190,.03);
  border: 1px solid var(--border2);
  padding: 12px;
}

.waiting-room-title {
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--text-dim);
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.wp-empty {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-dim);
  text-align: center;
  padding: 8px 0;
}

.wp-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 0;
  border-bottom: 1px solid var(--border2);
  font-family: var(--font-mono);
  font-size: 12px;
}
.wp-row:last-child { border-bottom: none; }

.wp-icon  { font-size: 16px; }
.wp-name  { flex: 1; color: var(--text); }
.wp-status.ok { color: var(--success); font-size: 11px; }

/* ============================================================
   BATTLE WAITING MESSAGE (during opponent play)
   ============================================================ */
.battle-wait-msg {
  position: fixed;
  inset: 0;
  background: rgba(5,11,26,.80);
  z-index: 350;
  display: flex;
  align-items: center;
  justify-content: center;
}

.bwm-inner {
  background: var(--bg2);
  border: 1px solid var(--border);
  padding: 32px 40px;
  text-align: center;
}

.bwm-title {
  font-family: var(--font-mono);
  font-size: 28px;
  color: var(--amber);
  letter-spacing: 4px;
  margin-bottom: 12px;
}

.bwm-sub {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-dim);
  letter-spacing: 2px;
  animation: pulse 1.2s ease-in-out infinite;
}

/* ============================================================
   BATTLE RESULT — multi-player
   ============================================================ */
.br-scores-multi {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
  width: 100%;
}

.br-scores-multi .br-score-box {
  flex: 1;
  min-width: 100px;
}

.br-rank {
  font-size: 22px;
  margin-bottom: 4px;
}

/* Opponent HUD — multi-player name label */
.opp-pname {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-dim);
  letter-spacing: 1px;
  white-space: nowrap;
}

/* ============================================================
   RESPONSIVE — 768px (tablet)
   ============================================================ */
@media (max-width: 768px) {
  .battle-panels {
    flex-direction: column;
  }
  .battle-panel {
    min-width: unset;
    width: 100%;
  }
  .battle-separator {
    padding: 4px 0;
  }
}

/* ============================================================
   RESPONSIVE — 480px (mobile)
   ============================================================ */
@media (max-width: 480px) {
  .hud {
    padding: 8px 10px;
    gap: 4px;
  }
  .hud-val {
    font-size: 18px;
  }
  .hud-grp {
    gap: 8px;
  }
  .hud-it {
    min-width: 44px;
  }

  .title-btns {
    grid-template-columns: 1fr;
    width: 90vw;
  }

  .tbtn-primary,
  .tbtn-score {
    grid-column: span 1;
  }

  .result-stats {
    grid-template-columns: repeat(3, 1fr);
  }
  .pt-cell {
    font-size: 5px;
  }
  .result-actions {
    flex-direction: column;
    align-items: center;
  }
  .rbtn {
    width: 100%;
    max-width: 320px;
    text-align: center;
    justify-content: center;
  }

  .br-scores {
    flex-direction: column;
  }

  #scr-battle {
    padding: 64px 12px 32px;
  }

  .game-main {
    padding: 12px;
    gap: 14px;
  }

  .el-card {
    padding: 14px 16px;
  }

  .q-symbol {
    font-size: 40px;
  }

  .romaji-guide {
    font-size: clamp(20px, 5vw, 28px);
  }
}
/* ============================================================
   TITLE — CATCHPHRASE (dynamically injected by JS)
   ============================================================ */
.title-catch {
  font-family: var(--font-ja);
  font-size: clamp(13px, 2.3vw, 16px);
  color: var(--text-mid);
  text-align: center;
  line-height: 1.7;
  max-width: 480px;
  padding: 0 12px;
  opacity: .85;
}

/* Streak / mastery tags in .title-meta */
#streak-meta  { color: #f97316 !important; }
#mastery-meta { color: var(--success) !important; }

/* Title primary CTA highlight */
.tbtn.tbtn-cta {
  background: rgba(0,220,190,0.12);
  border-color: var(--accent);
  box-shadow: 0 0 28px rgba(0,220,190,.10);
  position: relative;
}
.tbtn.tbtn-cta::after {
  content: 'おすすめ';
  position: absolute;
  top: -1px; right: -1px;
  font-family: var(--font-mono);
  font-size: 8px;
  letter-spacing: 1px;
  background: var(--accent);
  color: var(--bg);
  padding: 2px 7px;
}
.tbtn.tbtn-cta .tbtn-label { color: var(--accent2); }

/* ============================================================
   WELCOME OVERLAY (first visit)
   ============================================================ */
.welcome-overlay {
  position: fixed;
  inset: 0;
  background: rgba(5,11,26,.97);
  z-index: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadein .35s ease;
}

.welcome-card {
  background: var(--bg2);
  border: 1px solid var(--accent);
  box-shadow: 0 0 50px rgba(0,220,190,.15);
  padding: 36px 28px;
  max-width: 460px;
  width: 90%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
  text-align: center;
}

.welcome-icon { font-size: 52px; line-height: 1; }

.welcome-title {
  font-family: var(--font-mono);
  font-size: clamp(17px, 3.5vw, 24px);
  color: var(--accent);
  letter-spacing: 2px;
}

.welcome-sub {
  font-size: 14px;
  color: var(--text-mid);
  line-height: 1.85;
}

.welcome-btn {
  width: 100%;
  padding: 14px 20px;
  font-family: var(--font-ja);
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: all .15s;
  user-select: none;
  border: 1px solid var(--border);
  background: rgba(0,220,190,.05);
  color: var(--text-mid);
  letter-spacing: 1px;
}

.welcome-btn:hover {
  background: rgba(0,220,190,.12);
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

.welcome-btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--bg);
  font-weight: 900;
  font-size: 16px;
}

.welcome-btn.primary:hover {
  background: var(--accent2);
  border-color: var(--accent2);
  box-shadow: 0 10px 32px rgba(0,220,190,.38);
  transform: translateY(-3px);
}

/* ============================================================
   TUTORIAL OVERLAY (first question hint)
   ============================================================ */
.tutorial-overlay {
  position: fixed;
  inset: 0;
  background: rgba(5,11,26,.92);
  z-index: 250;
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadein .25s ease;
}

.tutorial-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  padding: 28px 24px;
  max-width: 420px;
  width: 90%;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.tutorial-title {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--accent);
  letter-spacing: 3px;
  text-align: center;
  margin-bottom: 4px;
}

.tutorial-step {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 13px;
  color: var(--text);
  line-height: 1.65;
}

.tut-num {
  background: var(--accent);
  color: var(--bg);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 900;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 1px;
}

.tutorial-example {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-dim);
  background: rgba(0,220,190,.04);
  border: 1px solid var(--border2);
  padding: 9px 14px;
  text-align: center;
  letter-spacing: 1px;
}

.tut-romaji {
  color: var(--accent);
  letter-spacing: 4px;
  font-size: 14px;
}

.tutorial-btn {
  padding: 14px;
  background: var(--accent);
  border: 2px solid var(--accent);
  color: var(--bg);
  font-family: var(--font-ja);
  font-size: 15px;
  font-weight: 900;
  cursor: pointer;
  transition: all .15s;
  letter-spacing: 2px;
  margin-top: 4px;
}

.tutorial-btn:hover {
  background: var(--accent2);
  border-color: var(--accent2);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,220,190,.3);
}

/* ============================================================
   RESULT — EXTENDED STATS (accuracy / mastery / streak)
   ============================================================ */
.result-stats-ext {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  width: 100%;
}

.stat-box-ext {
  background: rgba(0,220,190,.03);
  border: 1px dashed rgba(0,220,190,.12);
  padding: 10px;
  text-align: center;
}

.acc-val  { color: var(--success)  !important; }
.mast-val { color: var(--accent)   !important; }
.str-val  { color: #f97316         !important; }

/* ============================================================
   REVIEW MODE
   ============================================================ */
.review-notice {
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(245,158,11,.05);
  border: 1px solid rgba(245,158,11,.22);
  padding: 12px 16px;
  width: 100%;
  flex-wrap: wrap;
}

.review-notice-icon { font-size: 20px; flex-shrink: 0; }

.review-notice-txt {
  flex: 1;
  font-size: 13px;
  color: var(--text-mid);
  line-height: 1.5;
  min-width: 0;
}

.review-notice-btn {
  padding: 9px 18px;
  background: rgba(245,158,11,.12);
  border: 1px solid rgba(245,158,11,.38);
  color: var(--amber);
  font-family: var(--font-ja);
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  transition: all .15s;
  white-space: nowrap;
}

.review-notice-btn:hover {
  background: rgba(245,158,11,.22);
  border-color: var(--amber);
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(245,158,11,.15);
}

.review-banner {
  background: rgba(245,158,11,.07);
  border-bottom: 1px solid rgba(245,158,11,.18);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--amber);
  letter-spacing: 2px;
  padding: 6px 20px;
  text-align: center;
  flex-shrink: 0;
}

/* ============================================================
   MOBILE ENHANCEMENTS — larger touch targets
   ============================================================ */
@media (max-width: 480px) {
  .typing-inp {
    font-size: 24px;
    padding: 20px 16px;
    min-height: 64px;
  }

  .inp-overlay {
    font-size: 24px;
  }

  .dbtn {
    padding: 16px 18px;
    font-size: 16px;
    min-height: 52px;
  }

  .start-btn {
    padding: 18px 40px;
    font-size: 16px;
  }

  .tbtn {
    padding: 20px 14px;
    min-height: 82px;
  }

  .result-stats-ext {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ============================================================
   BATTLE LOBBY — btn-back overlap fix
   ============================================================ */
#scr-battle > .btn-back {
  /* Switch from fixed to absolute so it scrolls with the panel
     and does not float over the lobby title */
  position: absolute;
  top: 16px;
  left: 16px;
  z-index: 20;
}

/* Give the scroll container room for the absolute-positioned back button */
#scr-battle {
  position: fixed; /* already fixed via .screen */
}

/* ============================================================
   LOADING — faster exit animation
   ============================================================ */
#scr-loading.fast-exit {
  animation: fadeout .25s ease forwards;
  pointer-events: none;
}

@keyframes fadeout { from { opacity: 1; } to { opacity: 0; } }