:root{--navy:#124f3f;--blue:#1b7458;--yellow:#dcebdd;--ink:#17352d;--muted:#667970;--line:#d8e7de;--bg:#eef7f1;accent-color:#1b7458}
body{background:linear-gradient(180deg,#e7f4ec 0,#f5f3e9 520px)}
.cover{background:#092b76;color:white}
.coverButton{background:#092b76;box-shadow:0 18px 60px #00102f66}
.tapGuide{color:#092b76}
.installButton{border-color:white;background:white;color:#092b76}
.iosGuide{color:white}
.mark{background:#145f49;color:white}
.calculator,.notice{background:#fffef9;border-color:#f8fbf8}
.result{background:#124f3f}
.share{background:#dcebdd;color:#17352d}
.numberInput{width:100%;margin-top:10px;padding:14px 16px;border:1.5px solid #cddfd5;border-radius:14px;background:white;color:#17352d;font:inherit;font-size:1.08rem;font-weight:800;outline:none}
.numberInput:focus{border-color:#1b7458;box-shadow:0 0 0 4px #1b74581b}
.links a{color:#145f49}