*,:before,:after{box-sizing:border-box;margin:0;padding:0}:root{--bg:#fafaf9;--surface:#fff;--text:#1a1a1a;--text-muted:#6b7280;--accent:#2563eb;--correct:#16a34a;--correct-bg:#dcfce7;--incorrect:#dc2626;--incorrect-bg:#fee2e2;--urgent:#dc2626;--border:#e5e7eb;--shadow:0 1px 3px #00000014, 0 1px 2px #0000000f;--shadow-lg:0 4px 12px #0000001a, 0 2px 4px #0000000f;--radius:12px;--radius-lg:16px;--font-jp:"Noto Sans JP", sans-serif;--font-ui:"Inter", "Noto Sans JP", sans-serif}html,body{height:100%;overflow:hidden}body{font-family:var(--font-ui);background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;-webkit-tap-highlight-color:transparent;-webkit-user-select:none;user-select:none}.app{flex-direction:column;max-width:480px;height:100dvh;margin:0 auto;padding:16px;display:flex}.screen{flex-direction:column;flex:1;justify-content:center;align-items:center;display:flex}.start-content{text-align:center;width:100%}.logo-kanji{font-family:var(--font-jp);color:var(--accent);margin-bottom:8px;font-size:80px;font-weight:900;line-height:1}.game-title{letter-spacing:-.02em;margin-bottom:4px;font-size:32px;font-weight:700}.game-subtitle{color:var(--text-muted);margin-bottom:32px;font-size:15px}.game-rules{flex-direction:column;gap:12px;margin-bottom:32px;padding:0 8px;display:flex}.rule{color:var(--text-muted);align-items:center;gap:12px;font-size:14px;display:flex}.rule-icon{text-align:center;flex-shrink:0;width:24px;font-size:18px}.best-score-badge{background:var(--surface);border:1px solid var(--border);color:var(--accent);border-radius:20px;margin-bottom:24px;padding:6px 16px;font-size:14px;font-weight:600;display:inline-block}.start-btn{width:100%;font-size:17px;font-weight:600;font-family:var(--font-ui);color:#fff;background:var(--text);border-radius:var(--radius);cursor:pointer;-webkit-tap-highlight-color:transparent;border:none;padding:16px;transition:transform .1s,opacity .1s}.start-btn:active{opacity:.9;transform:scale(.97)}.game-screen{border-radius:16px;flex-direction:column;flex:1;height:100%;transition:background-color .3s,box-shadow .3s;display:flex;position:relative}.game-screen.wrong-flash{animation:.2s ease-out wrongFlashAnim}.particles-canvas{pointer-events:none;z-index:100;width:100%;height:100%;position:fixed;top:0;left:0}.game-header{flex-shrink:0;margin-bottom:8px}.game-stats{justify-content:space-between;align-items:center;margin-top:8px;display:flex}.stat-inline{color:var(--text-muted);font-size:15px}.stat-num{color:var(--text);font-size:20px;font-weight:700}.stat-total{color:var(--text-muted);font-size:14px;font-weight:400}.combo-badge{color:#ea580c;background:#fff7ed;border:1px solid #fed7aa;border-radius:20px;padding:4px 12px;font-size:14px;font-weight:600;transition:transform .2s,font-size .2s;animation:.2s ease-out popIn}.combo-badge.streak-small{font-size:14px}.combo-badge.streak-medium{color:#c2410c;background:#fff1e0;border-color:#fb923c;font-size:15px;animation:.2s ease-out popIn,.6s ease-in-out infinite streakPulse;transform:scale(1.05)}.combo-badge.streak-large{color:#b91c1c;background:linear-gradient(135deg,#fff1e0,#fee2e2);border-color:#ef4444;font-size:16px;font-weight:700;animation:.2s ease-out popIn,.4s ease-in-out infinite streakPulse;transform:scale(1.12);box-shadow:0 0 12px #ef44444d}.timer-container{width:100%}.timer-display{font-variant-numeric:tabular-nums;text-align:center;font-size:28px;font-weight:700;transition:color .3s}.timer-display.urgent{color:var(--urgent)}.timer-display.pulse{animation:.8s ease-in-out infinite pulse}.timer-bar-bg{background:var(--border);border-radius:2px;width:100%;height:4px;margin-top:4px;overflow:hidden}.timer-bar-fill{background:var(--text);border-radius:2px;height:100%;transition:width .1s linear}.timer-bar-fill.urgent{background:var(--urgent)}.bonus-flash{z-index:10;pointer-events:none;border-radius:8px;padding:4px 14px;font-size:18px;font-weight:700;animation:.6s ease-out forwards floatUp;position:fixed;top:80px;left:50%;transform:translate(-50%)}.bonus-flash.positive{color:var(--correct);background:var(--correct-bg)}.bonus-flash.negative{color:var(--incorrect);background:var(--incorrect-bg)}.game-body{flex-direction:column;flex:1;justify-content:center;gap:24px;display:flex}.kanji-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow);text-align:center;padding:32px 16px 24px;transition:opacity .15s,transform .15s}.kanji-card.enter{animation:.2s ease-out cardEnter}.kanji-card.exit{opacity:0;transform:scale(.95)translateY(-8px)}.kanji-character{font-family:var(--font-jp);color:var(--text);font-size:96px;font-weight:900;line-height:1.1}.kanji-reading{font-family:var(--font-jp);color:var(--text-muted);margin-top:8px;font-size:16px}.choices-grid{grid-template-columns:1fr 1fr;gap:10px;display:grid}.choice-btn{font-size:15px;font-weight:500;font-family:var(--font-ui);color:var(--text);background:var(--surface);border:1.5px solid var(--border);border-radius:var(--radius);cursor:pointer;-webkit-tap-highlight-color:transparent;text-align:center;justify-content:center;align-items:center;min-height:52px;padding:14px 8px;line-height:1.3;transition:transform 80ms,border-color 80ms,background 80ms;display:flex}.choice-btn:active:not(:disabled){transform:scale(.96)}.choice-btn.correct{background:var(--correct-bg);border-color:var(--correct);color:var(--correct)}.choice-btn.incorrect{background:var(--incorrect-bg);border-color:var(--incorrect);color:var(--incorrect);animation:.3s ease-out wrongShake}.result-content{text-align:center;width:100%}.result-kanji{font-family:var(--font-jp);color:var(--text-muted);margin-bottom:8px;font-size:64px;font-weight:900;line-height:1}.result-title{margin-bottom:24px;font-size:28px;font-weight:700}.victory-kanji{animation:1.5s ease-in-out infinite victoryGlow;color:#f59e0b!important}.victory-title{background:linear-gradient(135deg,#f59e0b,#ef4444,#8b5cf6);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text}.victory-sub{color:var(--text-muted);margin-bottom:16px;font-size:16px}.new-best-banner{color:#fff;background:linear-gradient(135deg,#fbbf24,#f59e0b);border-radius:20px;margin-bottom:24px;padding:6px 20px;font-size:14px;font-weight:700;animation:.3s ease-out popIn;display:inline-block}.stats-grid{grid-template-columns:1fr 1fr;gap:12px;margin-bottom:32px;display:grid}.stat-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:16px 8px}.stat-value{color:var(--text);font-size:28px;font-weight:700}.stat-label{color:var(--text-muted);margin-top:2px;font-size:13px}.game-screen.shake .kanji-card{animation:.5s ease-in-out infinite gentleShake}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}@keyframes cardEnter{0%{opacity:0;transform:scale(.92)translateY(12px)}to{opacity:1;transform:scale(1)translateY(0)}}@keyframes wrongShake{0%,to{transform:translate(0)}20%{transform:translate(-6px)}40%{transform:translate(6px)}60%{transform:translate(-4px)}80%{transform:translate(4px)}}@keyframes gentleShake{0%,to{transform:translate(0)}25%{transform:translate(-2px)}75%{transform:translate(2px)}}@keyframes floatUp{0%{opacity:1;transform:translate(-50%)translateY(0)}to{opacity:0;transform:translate(-50%)translateY(-24px)}}@keyframes popIn{0%{opacity:0;transform:scale(.8)}to{opacity:1;transform:scale(1)}}@keyframes wrongFlashAnim{0%{background-color:#dc262626}to{background-color:#0000}}@keyframes streakPulse{0%,to{transform:scale(1)}50%{transform:scale(1.08)}}@keyframes victoryGlow{0%,to{text-shadow:0 0 20px #f59e0b4d}50%{text-shadow:0 0 40px #f59e0b99,0 0 80px #ef444433}}@media (width>=480px){.kanji-character{font-size:120px}.choice-btn{padding:16px 12px;font-size:16px}}@media (height<=680px){.kanji-card{padding:20px 16px 16px}.kanji-character{font-size:72px}.game-body{gap:16px}}