: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}}.collection-header{text-align:center;margin-bottom:24px}.collection-title{font-size:1.5rem;font-weight:800;color:var(--ink);margin:0 0 4px;font-family:var(--font-ui)}.collection-subtitle{font-size:1rem;color:var(--muted);margin:0}.collection-stats{display:flex;gap:16px;justify-content:center;margin-bottom:24px}.collection-stat{display:flex;flex-direction:column;align-items:center;padding:12px 20px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);min-width:80px}.collection-stat-value{font-size:1.5rem;font-weight:800;color:var(--brand);font-family:var(--font-ui)}.collection-stat-label{font-size:.8rem;color:var(--muted);margin-top:2px}.collection-category{margin-bottom:24px}.collection-category-title{font-size:1.1rem;font-weight:700;color:var(--ink);margin:0 0 12px;padding-bottom:6px;border-bottom:2px solid var(--border);font-family:var(--font-ui)}.collection-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(80px,1fr));gap:10px}.collection-item{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:12px 4px 8px;background:var(--surface);border:2px solid var(--border);border-radius:var(--radius-sm);min-height:90px;transition:transform .15s ease}.collection-item:hover{transform:scale(1.05)}.collection-item.is-special{border-color:#fbbf24;background:linear-gradient(135deg,#fffbeb,#fef3c7);box-shadow:0 0 8px #fbbf244d}.collection-item.is-locked{opacity:.35;filter:grayscale(1)}.collection-item.is-locked:hover{transform:none}.collection-item-emoji{font-size:2rem;line-height:1}.collection-item-name{font-size:.7rem;color:var(--muted);margin-top:4px;text-align:center;font-family:var(--font-ui);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:100%}.collection-item .special-badge{font-size:.6rem;color:#d97706;font-weight:700}.collection-login-prompt{text-align:center;padding:40px 20px;color:var(--muted);font-size:1.1rem}.collection-empty{text-align:center;padding:40px 20px;color:var(--muted);font-size:1rem}.collection-play-btn{display:inline-block;margin-top:16px;padding:12px 32px;background:var(--brand);color:#fff;border:none;border-radius:var(--radius-sm);font-size:1rem;font-weight:700;font-family:var(--font-ui);cursor:pointer;min-height:3.5rem;text-decoration:none;transition:background .15s}.collection-play-btn:hover{background:var(--brand-hover)}.collection-category-progress{display:flex;align-items:center;gap:8px;margin-bottom:8px}.collection-progress-bar{flex:1;height:6px;background:var(--border);border-radius:3px;overflow:hidden}.collection-progress-fill{height:100%;background:var(--brand);border-radius:3px;transition:width .3s ease}.collection-progress-text{font-size:.75rem;color:var(--muted);white-space:nowrap}