:root{font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{margin:0;min-width:320px;min-height:100vh}body{margin:0;font-family:Pretendard,system-ui,sans-serif}:root{--accent: #7986cb;--bg-light: #f9f9f9;--bg-dark: #1e1e1e;--card-light: #f4f4f4;--card-dark: #2b2b2b}#root{margin:0 auto}.wrapper{display:flex;justify-content:center;align-items:flex-start;min-height:100vh;padding:2rem 1rem 3rem;box-sizing:border-box;transition:background .3s ease,color .3s ease}.wrapper.light{background-color:var(--bg-light);color:#222}.wrapper.dark{background-color:var(--bg-dark);color:#f0f0f0}.container{width:100%;max-width:600px;text-align:center;padding:1rem}.header{display:flex;justify-content:flex-end;margin-bottom:.5rem}.nav-bar{display:flex;justify-content:center;gap:.5rem;margin-bottom:1.5rem}.nav-link{padding:10px 18px;border-radius:20px;text-decoration:none;font-size:.95rem;font-weight:500;color:inherit;background:var(--card-light);transition:background .2s,color .2s}.nav-link.active{background:var(--accent);color:#fff}.wrapper.dark .nav-link{background:var(--card-dark)}.wrapper.dark .nav-link.active{background:var(--accent)}input{padding:12px;font-size:1rem;width:80%;max-width:300px;border:1px solid #ccc;border-radius:8px;outline:none;transition:border .2s}input:focus{border-color:var(--accent)}.input_area{margin-bottom:22px}.theme-toggle{padding:10px 14px;font-size:.95rem;font-weight:500;cursor:pointer;border:none;border-radius:8px;background-color:var(--accent);color:#fff;transition:background .2s}.theme-toggle:hover{background-color:#5c6bc0}.result{margin-top:1.5rem;font-size:1.1rem;background:#00000008;padding:1rem;border-radius:8px}.wrapper.dark .result{background:#ffffff0d}.fit-comment{font-size:.95rem;color:gray}.fit-warning{font-size:.9rem;color:#d84315;background-color:#ffcdd233;padding:.5rem;border-radius:6px;margin-top:.5rem}.favorites-bar{display:flex;justify-content:center;gap:.5rem;margin-bottom:1rem}.save-btn,.clear-btn{padding:8px 16px;font-size:.9rem;font-weight:500;border:none;border-radius:8px;cursor:pointer;transition:background .2s}.save-btn{background:var(--accent);color:#fff}.save-btn:hover{background:#5c6bc0}.clear-btn{background:var(--card-light);color:#666}.clear-btn:hover{background:#e0e0e0}.wrapper.dark .clear-btn{background:var(--card-dark);color:#aaa}.fit-gauge{margin:1.5rem 0 1rem}.gauge-labels{display:flex;justify-content:space-between;font-size:.8rem;color:gray;margin-bottom:4px;padding:0 2px}.gauge-track{position:relative;display:flex;height:28px;border-radius:14px;overflow:visible}.gauge-segment{flex:1;display:flex;align-items:center;justify-content:center;font-size:.7rem;font-weight:600;color:#fff}.gauge-segment:nth-child(1){background:#ef5350;border-radius:14px 0 0 14px}.gauge-segment:nth-child(2){background:#ff7043}.gauge-segment:nth-child(3){background:#66bb6a}.gauge-segment:nth-child(4){background:#42a5f5}.gauge-segment:nth-child(5){background:#7e57c2}.gauge-segment:nth-child(6){background:#78909c;border-radius:0 14px 14px 0}.gauge-segment-label{opacity:.9}.gauge-marker{position:absolute;top:-6px;transform:translate(-50%);display:flex;flex-direction:column;align-items:center;pointer-events:none}.gauge-marker-dot{width:14px;height:14px;background:#fff;border:3px solid #333;border-radius:50%;box-shadow:0 2px 4px #0000004d}.gauge-marker-label{font-size:.75rem;font-weight:700;margin-top:4px;white-space:nowrap}.share-btn{margin-top:1rem;padding:10px 20px;font-size:.95rem;font-weight:500;border:none;border-radius:8px;background:var(--accent);color:#fff;cursor:pointer;transition:background .2s}.share-btn:hover{background:#5c6bc0}.size-card{border:none;border-radius:12px;padding:1rem;background:var(--card-light);width:100%;max-width:140px;box-shadow:0 2px 5px #00000014;transition:background .3s ease,color .3s ease}.wrapper.dark .size-card{background:var(--card-dark);color:#fff;box-shadow:0 2px 5px #ffffff14}.size-chart{display:flex;flex-wrap:wrap;justify-content:center;gap:1rem;margin-top:1rem}.mode-toggle{display:flex;justify-content:center;gap:.5rem;margin-bottom:1.5rem}.mode-btn{padding:10px 20px;font-size:.95rem;font-weight:500;border:none;border-radius:20px;cursor:pointer;background:var(--card-light);color:inherit;transition:background .2s}.mode-btn.active{background:var(--accent);color:#fff}.wrapper.dark .mode-btn{background:var(--card-dark)}.wrapper.dark .mode-btn.active{background:var(--accent)}.size-select-grid{display:flex;flex-wrap:wrap;justify-content:center;gap:.5rem}.size-select-btn{padding:12px 20px;font-size:1rem;font-weight:600;border:2px solid var(--card-light);border-radius:12px;cursor:pointer;background:var(--card-light);color:inherit;transition:border-color .2s,background .2s}.size-select-btn.active{border-color:var(--accent);background:var(--accent);color:#fff}.wrapper.dark .size-select-btn{background:var(--card-dark);border-color:var(--card-dark)}.wrapper.dark .size-select-btn.active{background:var(--accent);border-color:var(--accent)}.wrapper.dark input{background-color:#333;color:#fff;border-color:#555}.wrapper.dark .theme-toggle{background-color:#5c6bc0}@media (max-width: 500px){h1{font-size:1.5rem}.size-card{font-size:.9rem;padding:.8rem}.nav-link{padding:8px 12px;font-size:.85rem}}