:root{--paper:#f8f7f2;--ink:#243e35;--muted:#6e786e;--line:#dddfd4;--green:#284e40;--lime:#d5e4b9;--orange:#c2744b;--white:#fffef9}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:30px}body{margin:0;background:var(--paper);color:var(--ink);font-family:"Yu Gothic",Meiryo,system-ui,sans-serif;line-height:1.7;font-size:14px}a{color:inherit;text-decoration:none}button,input,textarea,select{font:inherit}button,a,input,textarea,select{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:default;opacity:.5}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid var(--orange);outline-offset:4px}.header{height:88px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 5vw;gap:20px}.brand{font-weight:700;display:flex;align-items:center;gap:10px;letter-spacing:.06em}.brand-mark{border:1px solid 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@media(max-width:370px){main{padding:0 16px}.intro-decoration{right:-5px;width:88px;height:88px}h1{font-size:31px}.intro-decoration:after{width:112px;height:60px}.orbit{font-size:32px}.header{padding:0 16px}.about-link{max-width:72px}.big-number>span:first-child{font-size:54px}.calendar-card,.compare-card{padding:17px}.time-number>span:first-child{font-size:32px}.memory-card{padding:18px}.memory-card strong{font-size:34px}}
@media(max-width:760px){.intro{overflow:hidden}.intro-decoration{width:64px;height:64px;top:7px;right:5px}.intro-decoration:after{width:80px;height:43px}.orbit{font-size:23px}.orbit-label{font-size:4px}.intro-decoration i{width:5px;height:5px;left:14px}.intro-decoration b{font-size:20px;right:0}}
@media(max-width:370px){.tabs{margin-right:-16px;padding-right:16px}.intro-decoration{right:6px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}

.future-card{background:#edf1e5;border:1px solid #dce3d0;border-radius:12px;padding:30px}.future-period{display:flex;align-items:center;gap:10px;font-size:12px;margin:24px 0}.future-period select{background:var(--white);border:1px solid #cdd4c3;border-radius:6px;color:var(--ink);padding:9px 16px}.future-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.future-item{background:var(--white);border:1px solid var(--line);border-radius:10px;padding:24px}.future-item h3{margin:8px 0 16px}.future-item label{font-size:11px}.future-item input{width:65px;padding:7px;margin:0 5px;border:1px solid var(--line);border-radius:5px;background:var(--paper);color:var(--ink)}.future-result{padding-top:20px;margin-top:20px;border-top:1px solid var(--line)}.future-result strong{display:block;font:48px Georgia,serif}.future-result span{font-size:11px;color:var(--muted)}.future-message{text-align:center;font-family:'Yu Mincho',serif;font-size:17px;line-height:1.9;margin:30px 0 18px}@media(max-width:760px){.future-card{padding:22px}.future-grid{grid-template-columns:1fr;gap:12px}.future-item{padding:20px}.future-result{display:flex;align-items:baseline;gap:12px;padding-top:14px;margin-top:14px}.future-result strong{font-size:42px}.future-message{font-size:15px}.future-period{flex-wrap:wrap}}