:root{--sv-navy:#0f172a;--sv-blue:#2563eb;--sv-border:#dbe4f0;--sv-soft:#f5f8fc;--sv-muted:#64748b;--sv-green:#0f8a5f;--sv-red:#c24141}
*{box-sizing:border-box}.solve-page{margin:0;background:#f6f8fb;color:var(--sv-navy);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Yu Gothic",Meiryo,sans-serif;line-height:1.7}.solve-site-header{background:#fff;position:sticky;top:0;z-index:50;box-shadow:0 1px 0 rgba(15,23,42,.08)}.solve-header-row{min-height:78px}.mode-nav{border-top:1px solid #eef2f7;background:#fff}.mode-nav-inner{display:flex;gap:8px;overflow-x:auto;padding-top:10px;padding-bottom:10px;scrollbar-width:none}.mode-nav-inner::-webkit-scrollbar{display:none}.mode-nav a{white-space:nowrap;text-decoration:none;border:1px solid #d9e3ef;background:#fff;color:#334155;border-radius:999px;padding:9px 14px;font-size:13px;font-weight:700;display:inline-flex;align-items:center;gap:6px}.mode-nav a.is-active{background:#eaf2ff;border-color:#b9d0ff;color:#1d4ed8}.solve-main{padding:28px 0 72px}.solve-wrap{max-width:920px}.solve-hero{text-align:center;padding:22px 0 28px}.solve-hero .section-chip{margin-bottom:12px}.solve-hero h1{font-size:clamp(32px,5vw,52px);line-height:1.18;margin:0;color:#0f172a;letter-spacing:-.03em}.solve-hero>p{max-width:720px;margin:16px auto 0;color:#64748b;font-size:16px}.solver-card{padding:25px;margin-bottom:22px;border-radius:24px}.step-head{display:flex;align-items:flex-start;justify-content:space-between;gap:18px;margin-bottom:20px}.step-head h2{font-size:26px;line-height:1.35;margin:7px 0 5px}.step-head p{margin:0;color:#64748b;font-size:14px}.step-badge{display:inline-block;font-size:10px;font-weight:800;letter-spacing:.1em;color:#2563eb;background:#eaf2ff;border-radius:999px;padding:6px 9px}.daily-limit{flex:0 0 auto;min-width:92px;background:#eff6ff;border:1px solid #cfe1ff;border-radius:15px;padding:9px 12px;text-align:center}.daily-limit small{display:block;color:#64748b;font-size:10px;font-weight:700}.daily-limit strong{display:block;color:#1d4ed8;font-size:20px;line-height:1.3}.drop-zone{border:2px dashed #bfd1e6;border-radius:22px;min-height:330px;background:linear-gradient(180deg,#fbfdff,#f7fbff);display:grid;place-items:center;position:relative;overflow:hidden;transition:.18s;outline:none}.drop-zone:hover,.drop-zone.is-dragover,.drop-zone:focus-visible{border-color:#2563eb;background:#f2f7ff;box-shadow:0 0 0 4px rgba(37,99,235,.07)}.drop-empty{text-align:center;display:grid;justify-items:center;gap:8px;padding:28px}.upload-icon{width:72px;height:72px;border-radius:22px;display:grid;place-items:center;background:#eaf2ff;color:#2563eb;margin-bottom:4px}.upload-icon svg{width:40px;height:40px}.drop-empty b{font-size:20px}.drop-empty span,.drop-empty small{color:#64748b}.drop-empty span{font-size:13px}.drop-empty small{font-size:11px}.choose-btn{min-width:155px;margin:3px 0 2px}.preview-wrap{width:100%;height:100%;min-height:330px;padding:16px;display:grid;place-items:center}.preview-wrap img{display:block;max-width:100%;max-height:430px;object-fit:contain;border-radius:12px}.hidden{display:none!important}.file-bar{display:flex;align-items:center;justify-content:space-between;gap:14px;background:#f8fafc;border:1px solid #e1e8f0;border-radius:15px;padding:12px 14px;margin-top:12px}.file-meta{display:grid;min-width:0}.file-meta b{font-size:13px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.file-meta span{font-size:11px;color:#64748b}.file-actions{display:flex;gap:8px;flex:0 0 auto}.text-btn{border:0;background:transparent;color:#2563eb;font-size:12px;font-weight:700;padding:6px 7px;cursor:pointer}.text-btn.danger{color:#b91c1c}.upload-caution{margin:13px 2px 0;background:#fffaf0;border:1px solid #f5dfb5;border-radius:14px;padding:11px 13px;color:#785b2a;font-size:12px}.upload-caution b{color:#6b4d1e}.answer-step{margin-top:22px}.compact-head{margin-bottom:17px}.analyze-btn{display:flex;align-items:center;justify-content:center;gap:8px;width:100%;padding:16px 20px;border-radius:15px;font-size:17px}.analyze-btn:disabled{opacity:.48;cursor:not-allowed;box-shadow:none}.sparkle{font-size:20px}.limit-note{text-align:center;color:#64748b;font-size:11px;margin:9px 0 0}.loading-box{margin-top:20px;border:1px solid #dbe7f3;border-radius:18px;padding:20px;display:flex;align-items:center;justify-content:center;gap:14px;background:#f8fbff}.spinner{width:26px;height:26px;border:3px solid #dbeafe;border-top-color:#2563eb;border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.loading-box div{display:grid}.loading-box b{font-size:14px}.loading-box small{font-size:11px;color:#64748b}.result-box{margin-top:21px;border-top:1px solid #e4eaf1;padding-top:21px}.result-label{font-size:11px;font-weight:800;letter-spacing:.1em;color:#2563eb;margin-bottom:10px}.answer-card{background:linear-gradient(135deg,#eff6ff,#f8fbff);border:1px solid #cfe1ff;border-radius:18px;padding:17px 19px}.answer-card span,.reason-card span{display:block;font-size:11px;font-weight:700;color:#64748b;margin-bottom:4px}.answer-card strong{display:block;font-size:clamp(28px,4vw,38px);color:#0f172a;line-height:1.35}.reason-card{margin-top:11px;border:1px solid #e0e7ef;border-radius:18px;padding:16px 18px;background:#fff}.reason-card p{margin:0;color:#334155;font-size:14px;line-height:1.9}.result-actions{display:flex;justify-content:center;margin-top:15px}.ai-note{font-size:11px;color:#7b8794;text-align:center;margin:12px 0 0}.mvp-notice{margin-top:18px;background:#f8fafc;border:1px dashed #cbd5e1;border-radius:14px;padding:11px 13px;display:grid;gap:2px}.mvp-notice b{font-size:11px;color:#475569}.mvp-notice span{font-size:11px;color:#64748b}.solve-info{margin-top:58px}.info-heading{text-align:center;margin-bottom:22px}.info-heading .section-chip{display:inline-block;margin-bottom:10px}.info-heading h2{font-size:clamp(26px,3.8vw,36px);line-height:1.4;margin:0}.info-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}.info-grid article{background:#fff;border:1px solid #dbe4f0;border-radius:21px;padding:22px;box-shadow:0 8px 24px rgba(15,23,42,.04)}.info-icon{display:grid;place-items:center;width:54px;height:54px;border-radius:17px;background:#eaf2ff;color:#1d4ed8;font-weight:900;margin-bottom:15px}.info-grid h3{font-size:18px;line-height:1.5;margin:0 0 8px}.info-grid p{margin:0;color:#64748b;font-size:13px;line-height:1.85}.solve-footer{background:#fff;border-top:1px solid #e5eaf0;padding:22px 0;color:#64748b}.solve-footer .wrap{display:flex;justify-content:space-between;gap:20px}.solve-footer a{color:#2563eb;text-decoration:none;font-weight:700}
@media(max-width:720px){.solve-header-row{min-height:66px}.solve-header-row .brand{font-size:18px}.solve-header-row .tools-link{font-size:12px;padding:9px 11px}.solve-main{padding-top:12px}.solve-hero{padding:18px 0 20px}.solve-hero h1{font-size:30px}.solve-hero>p{font-size:14px;line-height:1.8;margin-top:12px}.solver-card{padding:17px;border-radius:19px}.step-head{gap:10px}.step-head h2{font-size:21px}.step-head p{font-size:13px}.daily-limit{min-width:78px;padding:8px 9px}.daily-limit strong{font-size:18px}.drop-zone{min-height:280px}.preview-wrap{min-height:280px;padding:10px}.preview-wrap img{max-height:360px}.drop-empty{padding:20px}.upload-icon{width:62px;height:62px;border-radius:18px}.drop-empty b{font-size:18px}.file-bar{align-items:flex-start;flex-direction:column}.file-actions{width:100%;justify-content:flex-end}.info-heading{text-align:left}.info-heading h2{font-size:25px}.info-grid{grid-template-columns:1fr;gap:12px}.info-grid article{padding:19px}.solve-footer .wrap{flex-direction:column;gap:7px}}