@import"https://fonts.googleapis.com/css2?family=Inter:wght@400;600;700;800&family=Nunito:wght@600;700;800&display=swap";:root{--bg: #fafbfc;--surface: #ffffff;--ink: #111827;--ink-soft: #5b6478;--muted: #6b7280;--border: #e3e8f2;--brand: #4f46e5;--brand-hover: #4338ca;--shadow-soft: 0 16px 36px rgba(15, 23, 42, .09);--shadow-card: 0 10px 24px rgba(15, 23, 42, .08);--font-ui: "Inter", "Nunito", "Noto Sans JP", "Hiragino Sans", "Yu Gothic", system-ui, sans-serif;--radius: 16px;--radius-sm: 10px}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-family:var(--font-ui);color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{min-height:100dvh}.page{max-width:720px;margin:0 auto;padding:0 16px 32px;display:flex;flex-direction:column;min-height:100dvh}.app-header{display:flex;align-items:center;justify-content:space-between;padding:16px 0;gap:12px;flex-wrap:wrap}.app-header-left{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.brand-mark{display:flex;align-items:center;gap:6px;text-decoration:none;color:var(--brand);font-weight:800;font-size:1rem}.brand-logo{width:28px;height:28px}.app-header-title{font-family:"Nunito",var(--font-ui);font-size:clamp(1.1rem,3vw,1.4rem);font-weight:800;color:var(--ink)}.locale-select-wrap{display:flex;align-items:center;gap:6px}.locale-select-label{font-size:.8rem;color:var(--muted)}.locale-select{font-family:var(--font-ui);font-size:.85rem;padding:6px 10px;border:1.5px solid var(--border);border-radius:8px;background:var(--surface);color:var(--ink);cursor:pointer;min-height:36px}.locale-select:focus-visible{outline:2px solid var(--brand);outline-offset:2px}.app-guide{display:flex;align-items:center;gap:.5rem;padding:.5rem .75rem;margin-bottom:.75rem;background:#4f46e50d;border:1px solid rgba(79,70,229,.1);border-radius:var(--radius-sm);animation:guide-fade-in .3s ease}.app-guide-icon{flex-shrink:0;font-size:.95rem;line-height:1}.app-guide-text{flex:1;font-size:.8rem;line-height:1.45;color:var(--ink-soft);margin:0}.app-guide-close{flex-shrink:0;background:none;border:none;padding:.2rem;cursor:pointer;color:var(--muted);font-size:.75rem;line-height:1;opacity:.6;transition:opacity .15s}.app-guide-close:hover{opacity:1}.app-guide-reopen{position:fixed;bottom:5rem;right:.75rem;width:2rem;height:2rem;border-radius:50%;background:var(--surface);border:1px solid var(--border);box-shadow:0 2px 8px #00000014;display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:.8rem;font-weight:700;color:var(--brand);z-index:10;transition:transform .15s,box-shadow .15s}.app-guide-reopen:hover{transform:scale(1.1);box-shadow:0 4px 12px #0000001f}@keyframes guide-fade-in{0%{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}.main-content{flex:1}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-soft)}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000073;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:100;padding:16px}.app-modal{width:100%;max-width:480px;max-height:80vh;overflow-y:auto;padding:24px;animation:pop-in .2s ease}.app-modal-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}.app-modal-header h2{font-size:1.2rem;font-weight:700}.app-modal-close{font-family:var(--font-ui);font-size:.85rem;padding:6px 14px;border:1.5px solid var(--border);border-radius:8px;background:var(--surface);color:var(--muted);cursor:pointer}.app-modal-body{font-size:.95rem;line-height:1.7;color:var(--ink-soft)}.app-modal-body p{margin-bottom:12px}.app-modal-body ol{padding-left:1.5em}.app-modal-body li{margin-bottom:8px}.app-modal-body a{color:var(--brand);text-decoration:underline}.site-footer{margin-top:auto;padding:24px 0 16px;border-top:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px}.site-footer-brand{display:flex;align-items:center;gap:12px}.site-footer-copy{font-size:.75rem;color:var(--muted)}.site-footer-links{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.site-footer-link,.site-footer-button{font-family:var(--font-ui);font-size:.8rem;color:var(--muted);text-decoration:none;background:none;border:none;cursor:pointer;padding:4px 0}.site-footer-link:hover,.site-footer-button:hover{color:var(--brand)}@keyframes pop-in{0%{opacity:0;transform:scale(.92)}to{opacity:1;transform:scale(1)}}@media (max-width: 480px){.site-footer{flex-direction:column;align-items:flex-start}}.fs-card{display:flex;flex-direction:column;align-items:center;gap:20px;padding:24px 16px}.fs-water-container{position:relative;width:240px;height:280px;border:3px solid #93c5fd;border-radius:0 0 var(--radius) var(--radius);border-top:none;background:linear-gradient(180deg,transparent 35%,#dbeafe 36%,#93c5fd 100%);overflow:hidden}.fs-water{position:absolute;bottom:0;left:0;right:0;height:65%;background:linear-gradient(180deg,#60a5fa80,#3b82f6b3)}.fs-wave{position:absolute;top:-6px;left:-10%;width:120%;height:12px;background:transparent;border-radius:50%;box-shadow:0 6px #60a5fa66,40px 4px #60a5fa4d,80px 6px #60a5fa66;animation:fs-wave-move 3s ease-in-out infinite}@keyframes fs-wave-move{0%,to{transform:translate(0)}50%{transform:translate(-20px)}}.fs-item{position:absolute;left:50%;transform:translate(-50%);transition:top 1s ease-in-out;z-index:2}.fs-item-above{top:10%}.fs-item-float{top:28%;animation:fs-bob 2s ease-in-out infinite}.fs-item-sink{top:72%;animation:fs-settle 1s ease-in}@keyframes fs-bob{0%,to{transform:translate(-50%) translateY(0)}50%{transform:translate(-50%) translateY(-8px)}}@keyframes fs-settle{0%{top:10%}to{top:72%}}.fs-emoji{font-size:4rem;line-height:1;display:block}.fs-item-name{font-family:"Nunito",var(--font-ui);font-size:1.5rem;font-weight:800;color:var(--ink)}.fs-predict{display:flex;flex-direction:column;align-items:center;gap:16px;animation:fs-fadeIn .3s ease}.fs-prompt{font-size:1.1rem;font-weight:600;color:var(--brand);animation:fs-pulse 1.5s ease-in-out infinite}@keyframes fs-pulse{0%,to{opacity:1}50%{opacity:.5}}.fs-choices{display:flex;gap:16px;width:100%;max-width:400px}.fs-btn{display:flex;align-items:center;justify-content:center;min-height:3.5rem;padding:12px 20px;border:2px solid var(--border);border-radius:var(--radius-sm);background:var(--surface);font-family:"Nunito",var(--font-ui);font-size:1.1rem;font-weight:700;color:var(--ink);cursor:pointer;transition:all .15s ease;flex:1}.fs-btn:hover{border-color:var(--brand);box-shadow:var(--shadow-card)}.fs-btn:active{transform:scale(.97)}.fs-btn-float{background:#ecfdf5;border-color:#22c55e}.fs-btn-float:hover{background:#dcfce7}.fs-btn-sink{background:#eff6ff;border-color:#3b82f6}.fs-btn-sink:hover{background:#dbeafe}.fs-btn-next{background:var(--brand);color:#fff;border-color:var(--brand);min-width:160px;flex:none}.fs-btn-next:hover{background:var(--brand-hover);border-color:var(--brand-hover)}.fs-result{display:flex;flex-direction:column;align-items:center;gap:12px;animation:fs-fadeIn .3s ease}@keyframes fs-fadeIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.fs-result-text{font-family:"Nunito",var(--font-ui);font-size:1.3rem;font-weight:800;text-align:center}.fs-result-correct{color:#22c55e}.fs-result-wrong{color:#ef4444}.fs-explanation{font-size:1rem;color:var(--ink-soft);text-align:center;line-height:1.6}.fs-progress{display:flex;gap:8px;padding-top:16px}.fs-progress-dot{width:10px;height:10px;border-radius:50%;background:var(--border);transition:all .2s ease}.fs-progress-dot-active{background:var(--brand);transform:scale(1.3)}.fs-progress-dot-done{background:#22c55e}.fs-complete{display:flex;flex-direction:column;align-items:center;gap:24px;padding:48px 16px}.fs-complete-text{font-family:"Nunito",var(--font-ui);font-size:1.6rem;font-weight:800;color:var(--ink);text-align:center}@media (max-width: 480px){.fs-water-container{width:200px;height:240px}.fs-emoji{font-size:3rem}.fs-choices{flex-direction:column}}