: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}.main-content{flex:1}.pick-hint{text-align:center;font-size:.95rem;color:var(--muted);margin:8px 0 12px}.color-palette{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;padding:8px 0 16px}.color-btn{width:64px;height:64px;border-radius:50%;border:3px solid var(--border);cursor:pointer;display:flex;align-items:flex-end;justify-content:center;padding-bottom:4px;transition:all .15s ease;box-shadow:0 2px 6px #00000014;font-family:var(--font-ui)}.color-btn-label{font-size:.65rem;font-weight:700;color:#fff;text-shadow:0 1px 3px rgba(0,0,0,.5)}.color-btn:hover{transform:scale(1.1);box-shadow:var(--shadow-card)}.color-btn:active{transform:scale(.95)}.color-btn--selected{border-color:var(--ink);border-width:4px;transform:scale(1.1)}.color-btn:focus-visible{outline:2px solid var(--brand);outline-offset:3px}.mixing-area{padding:16px 0}.mix-slots{display:flex;align-items:center;justify-content:center;gap:16px;margin-bottom:12px}.mix-slot{width:80px;height:80px;border-radius:var(--radius-sm);border:2px solid var(--border);display:flex;align-items:center;justify-content:center;font-family:"Nunito",var(--font-ui);font-size:.85rem;font-weight:700;color:#fff;text-shadow:0 1px 3px rgba(0,0,0,.4);transition:background-color .3s ease}.mix-plus{font-family:"Nunito",var(--font-ui);font-size:1.6rem;font-weight:800;color:var(--muted)}.mix-same-warning{text-align:center;font-size:.85rem;color:#ef4444;margin-bottom:8px}.mix-actions{display:flex;justify-content:center;gap:12px;margin-bottom:16px}.mix-btn{font-family:var(--font-ui);font-size:1.1rem;font-weight:700;padding:12px 32px;border:none;border-radius:12px;background:var(--brand);color:#fff;cursor:pointer;min-height:48px;transition:all .15s ease}.mix-btn:hover:not(:disabled){background:var(--brand-hover)}.mix-btn:disabled{opacity:.4;cursor:not-allowed}.mix-btn:focus-visible{outline:2px solid var(--brand);outline-offset:2px}.mix-reset-btn{font-family:var(--font-ui);font-size:.9rem;padding:8px 20px;border:1.5px solid var(--border);border-radius:8px;background:var(--surface);color:var(--muted);cursor:pointer;min-height:40px}.mix-reset-btn:hover{color:var(--ink);border-color:var(--ink-soft)}.mix-animation{display:flex;justify-content:center;align-items:center;padding:16px 0;position:relative;height:100px}.mix-swirl{width:48px;height:48px;border-radius:50%;position:absolute}.mix-swirl-1{animation:swirl-left .8s ease-in-out forwards}.mix-swirl-2{animation:swirl-right .8s ease-in-out forwards}@keyframes swirl-left{0%{transform:translate(-40px) scale(1);opacity:1}50%{transform:translate(-10px) rotate(180deg) scale(.8);opacity:.8}to{transform:translate(0) rotate(360deg) scale(0);opacity:0}}@keyframes swirl-right{0%{transform:translate(40px) scale(1);opacity:1}50%{transform:translate(10px) rotate(-180deg) scale(.8);opacity:.8}to{transform:translate(0) rotate(-360deg) scale(0);opacity:0}}.mix-result{display:flex;flex-direction:column;align-items:center;gap:8px;padding:16px 0;animation:pop-in .3s ease}.mix-result-label{font-size:.85rem;color:var(--muted)}.mix-result-swatch{width:100px;height:100px;border-radius:50%;border:3px solid var(--border);box-shadow:var(--shadow-card)}.mix-result-name{font-family:"Nunito",var(--font-ui);font-size:1.3rem;font-weight:800;color:var(--ink)}.color-history{padding:16px 0;border-top:1px solid var(--border);margin-top:16px}.color-history-title{font-family:"Nunito",var(--font-ui);font-size:1.1rem;font-weight:700;color:var(--ink);margin-bottom:12px}.color-history-empty{font-size:.85rem;color:var(--muted)}.color-history-grid{display:flex;gap:12px;flex-wrap:wrap}.color-stamp{display:flex;flex-direction:column;align-items:center;gap:4px}.color-stamp-swatch{width:44px;height:44px;border-radius:50%;border:2px solid var(--border);box-shadow:0 2px 4px #00000014}.color-stamp-name{font-size:.7rem;font-weight:600;color:var(--muted)}.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}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-soft)}.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){.color-btn{width:56px;height:56px}.mix-slot{width:64px;height:64px}.site-footer{flex-direction:column;align-items:flex-start}}