@import"https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=Noto+Sans+JP:wght@400;500;700&family=JetBrains+Mono:wght@400;500&display=swap";:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;touch-action:manipulation;-webkit-tap-highlight-color:transparent;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}html,body{box-sizing:border-box}*,*:before,*:after{box-sizing:inherit}a{font-weight:500;color:#646cff;text-decoration:inherit}a:hover{color:#535bf2}body{margin:0;min-width:320px;min-height:100vh;padding-bottom:env(safe-area-inset-bottom)}@media(max-width:640px){:root{font-size:14px}}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 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rgba(226,232,240,.8);display:block;text-decoration:none;position:relative;overflow:hidden}.tool-card:before{content:"";position:absolute;top:0;left:0;width:100%;height:4px;background:var(--accent-color);transform:scaleX(0);transform-origin:left;transition:transform .3s ease}.tool-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:var(--accent-color)}.tool-card:hover:before{transform:scaleX(1)}.card-content h2{font-size:1.5rem;font-weight:700;color:var(--text-primary);margin:0 0 .75rem;display:flex;align-items:center;gap:.5rem}.card-content p{color:var(--text-secondary);font-size:.95rem;line-height:1.6;margin:0}.card-arrow{margin-top:1.5rem;font-weight:600;font-size:.9rem;color:var(--accent-color);display:flex;align-items:center;gap:.25rem;opacity:0;transform:translate(-10px);transition:all .3s ease}.tool-card:hover .card-arrow{opacity:1;transform:translate(0)}@keyframes fadeInDown{0%{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@media(max-width:640px){.home-title{font-size:2.25rem;letter-spacing:-.02em}.home-subtitle{font-size:1rem;margin-top:.75rem}.home-container{padding:2rem 1rem;align-items:stretch}.tools-grid{grid-template-columns:1fr;gap:1.5rem}.tool-card{padding:1.5rem}.card-arrow{opacity:1;transform:translate(0)}}:root{--font-sans: "Inter", "Noto Sans JP", sans-serif;--font-mono: "JetBrains Mono", monospace;--c-bg-body: #f9f9f9;--c-bg-surface: #ffffff;--c-text-primary: #111827;--c-text-secondary: #6b7280;--c-text-tertiary: #9ca3af;--c-text-on-accent: #ffffff;--c-border: #e5e7eb;--c-border-hover: #d1d5db;--c-accent: #2563eb;--c-accent-hover: #1d4ed8;--c-accent-light: #eff6ff;--c-danger: #ef4444;--c-danger-text: #b91c1c;--c-success: #10b981;--radius-sm: 4px;--radius-md: 6px;--radius-lg: 8px;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .05), 0 2px 4px -1px rgba(0, 0, 0, .03);--ease-out: cubic-bezier(.16, 1, .3, 1)}*{box-sizing:border-box}body{margin:0;font-family:var(--font-sans);background-color:var(--c-bg-body);color:var(--c-text-primary);line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}h1,h2,h3,h4,h5,h6{margin:0;font-weight:700;letter-spacing:-.025em;line-height:1.2}button{font-family:var(--font-sans);cursor:pointer;border:none;background:none;padding:0}input{font-family:var(--font-sans)}.text-mono{font-family:var(--font-mono)}#root{max-width:800px;margin:0 auto;padding:4rem 2rem}@media(max-width:640px){#root{padding:2rem 1.5rem}}.app-header{margin-bottom:4rem}.app-header h1{font-size:2.5rem;color:var(--c-text-primary);margin-bottom:.5rem;letter-spacing:-.04em}.app-header .subtitle{font-size:1rem;color:var(--c-text-tertiary);font-weight:500}.nav-bar{display:flex;gap:2rem;margin-bottom:3rem;border-bottom:1px solid 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var(--c-border);font-size:.938rem;color:var(--c-text-primary)}.ranking-table tr:hover td{color:var(--c-accent)}.rank-number{font-family:var(--font-mono);font-weight:500;color:var(--c-text-tertiary)}.rank-number.top{color:var(--c-text-primary);font-weight:700}.item-tags{display:flex;gap:.5rem}.item-tag-text{font-size:.75rem;color:var(--c-text-secondary)}.text-right{text-align:right}.mt-4{margin-top:1rem}.mb-4{margin-bottom:1rem}.w-full{width:100%}@media(max-width:640px){#root{padding:2rem 1rem;max-width:100%}.app-header{margin-bottom:2rem}.app-header h1{font-size:2rem}.nav-bar{gap:1rem;padding-bottom:.75rem;margin-bottom:2rem;overflow-x:auto;white-space:nowrap;-webkit-overflow-scrolling:touch;scrollbar-width:none;-ms-overflow-style:none}.nav-bar::-webkit-scrollbar{display:none}.stopwatch-display{font-size:3.5rem}.stopwatch-buttons{flex-wrap:wrap}.stopwatch-buttons 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8px}.register-page__subtitle{font-size:.875rem;color:#6b7280;margin:0}.register-card{background:#fff;border-radius:16px;padding:24px;box-shadow:0 1px 3px #0000000d;border:1px solid #e5e7eb}.form-group{margin-bottom:24px}.form-group:last-child{margin-bottom:0}.form-label{display:block;font-size:.875rem;font-weight:500;color:#374151;margin-bottom:8px}.form-input{width:100%;padding:12px 16px;font-size:1rem;border:1px solid #e5e7eb;border-radius:10px;background:#f9fafb;color:#111827;transition:all .2s ease;box-sizing:border-box}.form-input:focus{outline:none;border-color:#2563eb;background:#fff;box-shadow:0 0 0 3px #2563eb1a}.form-input--large{font-size:1.5rem;font-weight:600;text-align:center;padding:16px}input[type=date].form-input,input[type=date]{-webkit-appearance:none;-moz-appearance:none;appearance:none;color:#111827;background:#f9fafb;padding:10px 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16px;background:#f3f4f6;border-radius:10px;margin-bottom:24px}.last-coin-info__label{font-size:.875rem;color:#6b7280}.last-coin-info__value{font-size:1.125rem;font-weight:600;color:#111827}.submit-button{width:100%;padding:16px;font-size:1rem;font-weight:600;color:#fff;background:linear-gradient(135deg,#3b82f6,#2563eb);box-shadow:0 4px 6px -1px #2563eb33,0 2px 4px -1px #2563eb1a;border:none;border-radius:12px;cursor:pointer;transition:all .2s ease}.submit-button:hover{transform:translateY(-1px);box-shadow:0 4px 12px #2563eb4d}.submit-button:active{transform:translateY(0)}.submit-button:disabled{background:#d1d5db;cursor:not-allowed;transform:none;box-shadow:none}.error-message{padding:12px 16px;background:#fef2f2;border:1px solid #fecaca;border-radius:10px;color:#dc2626;font-size:.875rem;margin-bottom:16px}.success-message{padding:12px 16px;background:#ecfdf5;border:1px solid #a7f3d0;border-radius:10px;color:#059669;font-size:.875rem;margin-bottom:16px;text-align:center}.diff-preview{display:flex;justify-content:center;align-items:center;gap:8px;padding:16px;background:#f9fafb;border-radius:10px;margin-bottom:16px}.diff-preview__value{font-size:1.25rem;font-weight:600}.diff-preview__value--positive{color:#10b981}.diff-preview__value--negative{color:#ef4444}.diff-preview__label{font-size:.875rem;color:#6b7280}.calendar{background:#fff;border-radius:16px;padding:20px;box-shadow:0 1px 3px #0000000d;border:1px solid #e5e7eb}.calendar__header{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}.calendar__title{font-size:1.125rem;font-weight:600;color:#111827;margin:0}.calendar__nav-button{width:36px;height:36px;display:flex;align-items:center;justify-content:center;border:1px solid #e5e7eb;border-radius:8px;background:#fff;cursor:pointer;transition:all .2s ease}.calendar__nav-button:hover{background:#f3f4f6}.calendar__nav-button 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.calendar__day-number{color:#2563eb;font-weight:600}.calendar__day-stats{flex:1;display:flex;flex-direction:column;justify-content:center;gap:1px;font-size:.625rem}.calendar__stat{display:flex;align-items:center;gap:2px;white-space:nowrap;overflow:hidden}.calendar__stat--earned{color:#10b981}.calendar__stat--premium{color:#8b5cf6}.calendar__stat--other{color:#f59e0b}.calendar__stat--serebo{color:#0ea5b0}.calendar__stat--pick{color:#dc2626}.calendar__stat-dot{width:4px;height:4px;border-radius:50%;flex-shrink:0}.calendar__stat--earned .calendar__stat-dot{background:#10b981}.calendar__stat--premium .calendar__stat-dot{background:#8b5cf6}.calendar__stat--other .calendar__stat-dot{background:#f59e0b}.calendar__stat--serebo .calendar__stat-dot{background:#0ea5b0}.calendar__stat--pick .calendar__stat-dot{background:#dc2626}@media(max-width:480px){.calendar__day{min-height:50px}.calendar__day-stats{font-size:.5625rem}}@media(max-width:640px){.calendar{padding:8px;width:100%;box-sizing:border-box}.calendar__header{margin-bottom:12px;gap:8px}.calendar__nav-button{width:32px;height:32px}.calendar__weekdays{grid-template-columns:repeat(7,1fr);gap:2px;margin-bottom:6px}.calendar__days{grid-template-columns:repeat(7,1fr);gap:2px;grid-auto-rows:minmax(40px,auto)}.calendar__day{aspect-ratio:auto;min-height:40px;padding:4px;border-radius:6px}.calendar__day-number{font-size:.625rem;margin-bottom:2px}.calendar__day-stats{font-size:.5rem;gap:1px}.calendar__stat{white-space:normal;overflow-wrap:anywhere;display:block;line-height:1}.calendar__stat-dot{width:3px;height:3px}.calendar__nav-button{width:30px;height:30px}.calendar__title{font-size:1rem}}.stats-page{max-width:800px;margin:0 auto}.stats-page__header{text-align:center;margin-bottom:24px}.stats-page__title{font-size:1.5rem;font-weight:600;color:#111827;margin:0 0 8px}.stats-page__subtitle{font-size:.875rem;color:#6b7280;margin:0}.stats-section{margin-bottom:24px}.stats-section__title{font-size:1rem;font-weight:600;color:#374151;margin:0 0 12px}.stats-card{background:#fff;border-radius:16px;padding:20px;box-shadow:0 1px 3px #0000000d;border:1px solid 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