:root{--ink:#173a32;--muted:#60756e;--green:#2f6859;--deep:#163d35;--cream:#f8f5ec;--paper:#fffdf7;--sun:#e9b95f;--line:rgba(23,58,50,.13);--shadow:0 22px 60px rgba(29,64,53,.1)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:var(--cream);font-family:"Hiragino Kaku Gothic ProN","Yu Gothic","Noto Sans JP",sans-serif;line-height:1.8;letter-spacing:.02em}a{color:inherit}.container{width:min(1040px,calc(100% - 36px));margin:auto}.nav{position:sticky;top:0;z-index:20;background:rgba(248,245,236,.92);backdrop-filter:blur(15px);border-bottom:1px solid var(--line)}.nav-inner{height:72px;display:flex;align-items:center;justify-content:space-between}.brand img{display:block;width:145px;height:55px;object-fit:contain}.nav-links{display:flex;align-items:center;gap:24px;font-size:13px;font-weight:700}.nav-links a{text-decoration:none}.nav-cta,.button{display:inline-flex;align-items:center;justify-content:center;border:0;padding:13px 22px;color:#fff;background:var(--deep);border-radius:999px;text-decoration:none;font:inherit;font-weight:700;cursor:pointer;box-shadow:0 10px 25px rgba(22,61,53,.16)}
.breadcrumb{padding-top:28px;color:var(--muted);font-size:13px}.breadcrumb a{text-decoration:none}.hero{padding:48px 0 34px;text-align:center}.eyebrow{color:var(--green);font-size:12px;font-weight:800;letter-spacing:.18em}.hero h1{margin:14px auto 16px;font-family:"Yu Mincho","Hiragino Mincho ProN",serif;font-size:clamp(34px,5vw,56px);line-height:1.35}.hero p{max-width:720px;margin:auto;color:var(--muted);font-size:17px}.tool-wrap{width:min(760px,calc(100% - 36px));margin:0 auto 90px}.panel{padding:34px;background:var(--paper);border:1px solid var(--line);border-radius:28px;box-shadow:var(--shadow)}.panel h2{margin:0 0 8px;font-size:25px}.panel-intro{margin:0 0 24px;color:var(--muted)}.field{margin:18px 0}.field label,.field legend{display:block;margin-bottom:7px;font-weight:700}.field small{display:block;margin-top:5px;color:var(--muted)}input,select{width:100%;min-height:50px;padding:10px 14px;border:1px solid rgba(23,58,50,.25);border-radius:12px;background:white;color:var(--ink);font:inherit}input:focus,select:focus{outline:3px solid rgba(47,104,89,.14);border-color:var(--green)}.days{display:grid;grid-template-columns:repeat(7,1fr);gap:9px}.day label{font-size:12px;text-align:center}.day input{padding:8px;text-align:center}.actions{margin-top:26px}.actions .button{width:100%;min-height:54px}.result{display:none;margin-top:28px;padding:26px;background:#eef4eb;border-radius:20px;border:1px solid rgba(47,104,89,.16)}.result.show{display:block}.result-label{color:var(--green);font-size:12px;font-weight:800;letter-spacing:.1em}.result-number{margin:4px 0;font-family:"Yu Mincho","Hiragino Mincho ProN",serif;font-size:clamp(36px,8vw,56px);font-weight:700;line-height:1.3}.result p{margin:10px 0}.result .button{margin-top:12px;background:#f2d487;color:var(--deep);box-shadow:none}.explain{margin-top:28px;padding:28px;background:rgba(255,253,247,.7);border:1px solid var(--line);border-radius:22px}.explain h2{margin-top:0;font-size:22px}.explain h3{margin:24px 0 5px;font-size:17px}.explain p,.explain li{color:var(--muted);font-size:14px}.source{font-size:13px}.source a{color:var(--green)}.disclaimer{margin-top:22px;color:var(--muted);font-size:12px}.tools-hero{padding:75px 0 45px}.tools-hero h1{margin:12px 0;font-family:"Yu Mincho","Hiragino Mincho ProN",serif;font-size:clamp(40px,6vw,64px)}.tools-hero p{max-width:680px;color:var(--muted);font-size:17px}.tool-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;padding-bottom:100px}.tool-card{display:flex;min-height:290px;flex-direction:column;padding:28px;background:var(--paper);border:1px solid var(--line);border-radius:24px;text-decoration:none;box-shadow:0 12px 34px rgba(29,64,53,.06)}.tool-card span{color:var(--green);font-size:12px;font-weight:800}.tool-card h2{font-size:23px;line-height:1.5}.tool-card p{margin:0;color:var(--muted);font-size:14px}.tool-card b{margin-top:auto;color:var(--green);font-size:13px}footer{padding:34px 0;border-top:1px solid var(--line)}.footer-inner{display:flex;align-items:center;justify-content:space-between}.footer-links{display:flex;gap:18px;color:var(--muted);font-size:12px}.footer-links a{text-decoration:none}.mode-tabs{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-bottom:22px}.mode-tabs button{padding:11px;border:1px solid var(--line);border-radius:12px;background:white;color:var(--ink);font:inherit;font-weight:700;cursor:pointer}.mode-tabs button.active{background:var(--deep);color:white}.hidden{display:none}
@media(max-width:760px){.tool-grid{grid-template-columns:1fr}.days{grid-template-columns:repeat(4,1fr)}.nav-links>a:not(.nav-cta){display:none}.panel{padding:26px 20px}.footer-inner{align-items:flex-start;flex-direction:column;gap:18px}.footer-links{flex-wrap:wrap}.hero{text-align:left}.tool-card{min-height:230px}}