@import "https://fonts.googleapis.com/css2?family=DM+Serif+Display&family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&display=swap";:root{--bg:#faf9f7;--bg-card:#fff;--bg-subtle:#f4f2ef;--text:#3d3832;--text-heading:#1a1714;--text-muted:#7a7167;--border:#e5e0d8;--primary:#1d4ed8;--primary-light:#eff6ff;--primary-dark:#1e3a8a;--accent:#d97706;--accent-light:#fffbeb;--success:#16a34a;--success-light:#f0fdf4;--warning:#d97706;--warning-light:#fffbeb;--danger:#dc2626;--danger-light:#fef2f2;--highlight-bg:#eff6ff;--shadow:0 1px 3px #00000014, 0 1px 2px #0000000a;--shadow-md:0 4px 6px -1px #00000014, 0 2px 4px -1px #0000000a;--shadow-lg:0 10px 15px -3px #00000014, 0 4px 6px -2px #0000000a;--radius:12px;--radius-sm:8px;color:var(--text);background:var(--bg);scroll-behavior:smooth;font-family:DM Sans,Pretendard,-apple-system,BlinkMacSystemFont,system-ui,sans-serif;font-size:16px;line-height:1.65}*{box-sizing:border-box;margin:0;padding:0}body{margin:0}.app{max-width:1100px;margin:0 auto;padding:0 24px}.sticky-nav{z-index:100;-webkit-backdrop-filter:blur(10px);border-bottom:1px solid var(--border);background:#faf9f7eb;align-items:center;gap:24px;padding:0 24px;display:flex;position:sticky;top:0}.sticky-nav-brand{color:var(--text-heading);white-space:nowrap;padding:14px 0;font-family:DM Serif Display,Georgia,serif;font-size:1rem;text-decoration:none}.sticky-nav-links{flex-wrap:wrap;gap:4px;padding:8px 0;display:flex}.sticky-nav-links a{color:var(--text-muted);border-radius:var(--radius-sm);padding:6px 12px;font-size:.85rem;font-weight:500;text-decoration:none;transition:all .15s}.sticky-nav-links a:hover{background:var(--bg-subtle);color:var(--text-heading)}.app-header{text-align:center;border-bottom:1px solid var(--border);margin-bottom:64px;padding:64px 0 48px}.app-header h1{color:var(--text-heading);letter-spacing:-.02em;margin-bottom:16px;font-family:DM Serif Display,Georgia,serif;font-size:3rem;font-weight:400;line-height:1.2}.header-badge{background:var(--accent-light);color:var(--accent);letter-spacing:.05em;text-transform:uppercase;border:1px solid #fde68a;border-radius:20px;margin-bottom:20px;padding:4px 12px;font-size:.78rem;font-weight:600;display:inline-block}.subtitle{color:var(--text-muted);max-width:600px;margin-bottom:8px;margin-left:auto;margin-right:auto;font-size:1.1rem}.header-intro{background:var(--bg-subtle);border:1px solid var(--border);border-radius:var(--radius);text-align:left;align-items:flex-start;gap:16px;max-width:680px;margin:28px auto 0;padding:20px 28px;display:flex}.header-intro-icon{flex-shrink:0;margin-top:2px;font-size:1.5rem}.header-intro-text{color:var(--text-muted);font-size:.9rem;line-height:1.6}.header-intro-text strong{color:var(--text)}.nav{flex-wrap:wrap;justify-content:center;gap:16px;margin-top:28px;display:flex}.nav a{color:var(--primary);background:var(--primary-light);border:1px solid #0000;border-radius:20px;padding:8px 18px;font-size:.85rem;font-weight:600;text-decoration:none;transition:all .2s}.nav a:hover{background:var(--primary);color:#fff;box-shadow:var(--shadow-md);transform:translateY(-1px)}.section{border-bottom:1px solid var(--border);margin-bottom:80px;padding-bottom:64px;scroll-margin-top:60px}.section h2{color:var(--text-heading);letter-spacing:-.01em;margin-bottom:8px;font-family:DM Serif Display,Georgia,serif;font-size:2rem;font-weight:400;line-height:1.25}.section-header{margin-bottom:28px}.section-number{letter-spacing:.1em;text-transform:uppercase;color:var(--accent);margin-bottom:6px;font-size:.75rem;font-weight:700;display:inline-block}.section-desc{color:var(--text-muted);margin-top:6px;font-size:.95rem}.section h3{color:var(--text-heading);margin-bottom:12px;font-size:1.05rem;font-weight:600}.quality-buttons{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);margin:20px 0;padding:24px}.quality-guide{background:var(--bg-subtle);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-muted);align-items:flex-start;gap:8px;margin-bottom:16px;padding:12px 16px;font-size:.85rem;display:flex}.quality-guide-icon{color:var(--accent);flex-shrink:0;font-weight:700}.quality-scale{flex-wrap:wrap;gap:6px;margin-top:6px;display:flex}.quality-scale-item{align-items:center;gap:4px;font-size:.78rem;display:flex}.quality-scale-dot{border-radius:50%;flex-shrink:0;width:10px;height:10px}.button-grid{grid-template-columns:repeat(6,1fr);gap:10px;margin:16px 0;display:grid}.quality-btn{border:2px solid var(--border);cursor:pointer;background:var(--bg-card);border-radius:10px;flex-direction:column;align-items:center;gap:6px;padding:16px 8px;font-family:inherit;transition:all .18s;display:flex;position:relative;overflow:hidden}.quality-btn:before{content:"";opacity:0;transition:opacity .18s;position:absolute;inset:0}.quality-btn:hover{box-shadow:var(--shadow-lg);transform:translateY(-3px)}.quality-btn:hover:before{opacity:.07}.quality-btn:active{transform:translateY(0)}.quality-number{font-family:DM Serif Display,Georgia,serif;font-size:1.6rem;font-weight:400;line-height:1}.quality-label{color:var(--text-muted);text-align:center;font-size:.7rem;font-weight:500;line-height:1.3}.quality-0{background:linear-gradient(160deg, #fff1f1 0%, var(--bg-card) 60%);border-color:#dc2626}.quality-0 .quality-number{color:#dc2626}.quality-0:before{background:#dc2626}.quality-1{background:linear-gradient(160deg, #fff4ed 0%, var(--bg-card) 60%);border-color:#ea580c}.quality-1 .quality-number{color:#ea580c}.quality-1:before{background:#ea580c}.quality-2{background:linear-gradient(160deg, #fffbeb 0%, var(--bg-card) 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.15s}.reset-btn:hover{background:var(--danger-light);border-color:var(--danger);color:var(--danger)}.history,.results-detail{margin:20px 0}.history-table-wrapper{border-radius:var(--radius);box-shadow:var(--shadow);overflow-x:auto}table{border-collapse:collapse;background:var(--bg-card);border-radius:var(--radius);width:100%;font-size:.875rem;overflow:hidden}thead{background:var(--bg-subtle)}th{text-align:left;letter-spacing:.04em;text-transform:uppercase;color:var(--text-muted);border-bottom:2px solid var(--border);white-space:nowrap;padding:11px 14px;font-size:.78rem;font-weight:600}td{border-bottom:1px solid var(--border);vertical-align:middle;padding:10px 14px}tr:last-child td{border-bottom:none}.fail-row{background:var(--danger-light)}.latest-row{background:#eff6ff;animation:.5s ease-out rowHighlight}@keyframes 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.formula-toggle-icon{transform:rotate(180deg)}.formula-body{opacity:0;max-height:0;transition:max-height .3s,opacity .3s;overflow:hidden}.formula-body.open{opacity:1;max-height:600px}.formula{background:var(--bg-subtle);border:1px solid var(--border);border-radius:0 0 var(--radius-sm) var(--radius-sm);border-top:none;padding:16px 20px}.formula ul{margin:8px 0;padding-left:20px}.formula li{margin-bottom:4px}.formula-text{background:var(--bg-card);border-radius:var(--radius-sm);border:1px solid var(--border);letter-spacing:.01em;margin:10px 0;padding:10px 14px;font-family:DM Mono,Fira Code,monospace;font-size:.88rem;overflow-x:auto}.formula-simple{background:var(--success-light);border-radius:var(--radius-sm);color:#15803d;border:1px solid #bbf7d0;margin-bottom:12px;padding:14px 18px;font-size:.88rem;line-height:1.6}.info-box{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);margin:20px 0;padding:24px}.info-box.highlight{background:var(--primary-light);border-color:#93c5fd}.info-box ul{margin-top:10px;padding-left:20px}.info-box li{margin-bottom:6px}.chart-container{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);margin:20px 0;padding:24px}.chart-container h3{margin-bottom:16px}.controls{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);flex-direction:column;gap:20px;margin:20px 0;padding:24px;display:flex}.control-group{flex-direction:column;gap:4px;display:flex}.control-group label{color:var(--text-heading);flex-direction:column;gap:8px;font-size:.9rem;font-weight:600;display:flex}.control-group input[type=text]{border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--bg);outline:none;padding:10px 14px;font-family:DM Mono,Fira Code,monospace;font-size:.9rem;transition:border-color .2s}.control-group 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Display,Georgia,serif;font-size:1.75rem;font-weight:400;display:block}.quality-badge{color:#fff;border-radius:50%;justify-content:center;align-items:center;width:28px;height:28px;font-size:.85rem;font-weight:700;display:inline-flex}.q-0,.q-1{background:#dc2626}.q-2{background:#d97706}.q-3{background:#ca8a04}.q-4{background:#16a34a}.q-5{background:#1d4ed8}.scenario-tabs{flex-wrap:wrap;gap:8px;margin-bottom:20px;display:flex}.scenario-tab{border:1px solid var(--border);background:var(--bg-card);cursor:pointer;color:var(--text-muted);border-radius:20px;padding:9px 16px;font-family:inherit;font-size:.85rem;font-weight:500;transition:all .15s}.scenario-tab:hover{border-color:var(--primary);color:var(--primary)}.scenario-tab.active{background:var(--primary-dark);color:#fff;border-color:var(--primary-dark)}.app-footer{text-align:center;color:var(--text-muted);border-top:1px solid var(--border);padding:32px 0;font-size:.85rem}@media (width<=768px){.sticky-nav-brand{display:none}.sticky-nav{justify-content:center;padding:0 16px}.app{padding:0 16px}.app-header h1{font-size:2rem}.button-grid{grid-template-columns:repeat(3,1fr)}.state-grid{grid-template-columns:repeat(2,1fr)}.header-intro{text-align:left}.section h2{font-size:1.6rem}}@media (width<=480px){.app-header h1{font-size:1.7rem}.button-grid{grid-template-columns:repeat(3,1fr)}.sticky-nav-links a{padding:6px 8px;font-size:.8rem}}