:root{color-scheme:light dark;color:#17243f;font-synthesis:none;--surface:#fff;--surface-muted:#f5f8fd;--text:#17243f;--muted:#53647c;--border:#dce4ef;--control-border:#72849c;--accent:#1d4ed8;--accent-contrast:#fff;--selected:#edf3ff;--badge-background:#dbeafe;--badge-text:#1e40af;--disabled-background:#f1f5f9;--disabled-text:#5c6a7c;--error:#b42335;--focus:#1d4ed8;background:#f2f6fc;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Noto Sans JP,sans-serif}*{box-sizing:border-box}body{background:radial-gradient(at 0 0,#e3edff 0,#0000 55%);min-width:360px;margin:0;line-height:1.6}button,input{font:inherit}button{cursor:pointer;transition:background-color .12s,border-color .12s}button:disabled{cursor:not-allowed;color:var(--disabled-text);background:var(--disabled-background);border-color:var(--control-border);border-style:dashed}button:focus-visible,input:focus-visible{outline:3px solid var(--focus);outline-offset:3px}.app-shell{width:min(1120px,100% - 64px);margin:48px auto 32px}.app-header{margin-bottom:30px}.eyebrow{color:var(--accent);letter-spacing:.12em;margin:0 0 9px;font-size:.8125rem;font-weight:700}h1{letter-spacing:-.02em;margin:0;font-size:clamp(1.5rem,2.8vw,2rem);line-height:1.4}.app-name{letter-spacing:-.04em;font-weight:800}.title-description{font-weight:600}.app-description{color:var(--muted);margin:12px 0 0;font-size:.9375rem}.calendar-panel{border:1px solid var(--border);background:var(--surface);border-radius:20px;padding:32px;box-shadow:0 14px 48px #18346608}.month-navigation{grid-template-columns:110px 1fr 110px;align-items:center;gap:20px;margin-bottom:26px;display:grid}.month-title{text-align:center}h2{letter-spacing:.01em;margin:0;font-size:1.875rem;font-weight:750}.month-summary{color:var(--muted);margin:3px 0 0;font-size:.8125rem}.navigation-button{border:1px solid var(--control-border);background:var(--surface);min-height:42px;color:var(--text);white-space:nowrap;border-radius:9px;padding:8px 16px;font-size:.875rem;font-weight:600}.navigation-button:not(:disabled):hover{background:var(--selected);border-color:var(--accent)}.date-form{background:var(--surface-muted);border-radius:12px;margin-bottom:24px;padding:20px 24px 0}fieldset{border:0;min-width:0;margin:0;padding:0}.date-input-group{justify-content:center;align-items:center;gap:12px;display:flex}.date-input-group label{margin-right:4px;font-size:.875rem;font-weight:700}#date-input{border:1px solid var(--control-border);background:var(--surface);width:192px;min-height:44px;color:var(--text);font-variant-numeric:tabular-nums;letter-spacing:.075em;border-radius:8px;padding:8px 14px;font-size:1.0625rem}#date-input::placeholder{color:var(--muted);letter-spacing:0;font-size:.875rem}#date-input[aria-invalid=true]{border:2px solid var(--error)}.display-button{border:1px solid var(--accent);min-height:44px;color:var(--accent-contrast);background:var(--accent);border-radius:8px;padding:8px 26px;font-weight:700}.display-button:not(:disabled):hover{filter:brightness(.92)}.input-hint{color:var(--muted);text-align:center;margin:10px 0 0;font-size:.8125rem}.input-error{min-height:28px;color:var(--error);text-align:center;margin:0;padding:3px 0;font-size:.875rem;font-weight:600}.loading-message{border:1px solid var(--control-border);color:var(--text);border-radius:8px;padding:16px}.calendar-scroll{border:1px solid var(--border);border-radius:12px;overflow-x:auto}.calendar-table{border-collapse:separate;border-spacing:0;table-layout:fixed;width:100%;min-width:840px}.calendar-table th{background:var(--surface-muted);color:var(--muted);padding:12px;font-size:.8125rem;font-weight:700}.day-cell{border-top:1px solid var(--border);vertical-align:top;height:134px;padding:0}.day-cell+.day-cell{border-left:1px solid var(--border)}.day-card{flex-direction:column;align-items:flex-start;min-height:134px;padding:15px 14px 13px;display:flex;position:relative}.day-number{font-variant-numeric:tabular-nums;font-size:1.375rem;font-weight:650;line-height:1.3}.day-date{color:var(--muted);font-variant-numeric:tabular-nums;letter-spacing:.025em;margin-top:6px;font-size:.75rem}.day-badges{flex-wrap:wrap;gap:4px;min-height:23px;margin-top:10px;display:flex}.badge{white-space:nowrap;border:1px solid #0000;border-radius:5px;align-items:center;min-height:22px;padding:1px 7px;font-size:.6875rem;font-weight:700;line-height:1.6;display:inline-flex}.prime-badge{background:var(--badge-background);color:var(--badge-text)}.selected-badge{color:var(--accent);border-color:var(--accent);background:var(--surface)}.is-prime .day-number{color:var(--accent)}.is-selected{background:var(--selected)}.is-selected .day-card:after{content:"";border:2px solid var(--accent);pointer-events:none;border-radius:2px;position:absolute;inset:0}.is-empty{background:var(--surface-muted)}.calendar-footer{flex-direction:column;gap:24px;margin-top:18px;display:flex}.calendar-legend{color:var(--muted);flex-wrap:wrap;justify-content:center;align-items:center;gap:8px;margin:0;font-size:.75rem;display:flex}.legend-divider{margin:0 5px}.year-navigation{justify-content:center;gap:12px;display:flex}.year-navigation .navigation-button{min-width:128px}.app-footer{color:var(--muted);flex-wrap:wrap;justify-content:space-between;gap:10px;padding:16px 2px;font-size:.75rem;display:flex}.app-footer p{margin:0}.sr-only{clip-path:inset(50%);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}@media (prefers-color-scheme:dark){:root{color:#edf3ff;--surface:#131e30;--surface-muted:#18253a;--text:#edf3ff;--muted:#b0bfd5;--border:#35435a;--control-border:#8397b5;--accent:#a6c8ff;--accent-contrast:#112343;--selected:#203756;--badge-background:#25436d;--badge-text:#d3e5ff;--disabled-background:#1b283b;--disabled-text:#a4b3c9;--error:#ffadb6;--focus:#a6c8ff;background:#0c1422}body{background:radial-gradient(at 0 0,#1a2c49 0,#0000 55%)}.calendar-panel{box-shadow:0 14px 48px #00000020}}@media (prefers-reduced-motion:reduce){button{transition:none}}