:root{--bg:#06110e;--panel:#0b1d18;--panel2:#102a22;--line:#285345;--green:#18ef92;--mint:#8affbd;--text:#effaf5;--muted:#a9c1b6;--yellow:#ffd166;--danger:#ff887d;--max:920px}*{box-sizing:border-box}html{background:var(--bg);scroll-behavior:smooth}body{margin:0;min-width:0;background:radial-gradient(circle at 90% 0,rgba(24,239,146,.08),transparent 34rem),var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Hiragino Sans","Yu Gothic UI",sans-serif;line-height:1.65;overflow-x:hidden}button,input,select,textarea{font:inherit}button,a{touch-action:manipulation;-webkit-tap-highlight-color:transparent}.shell{width:min(var(--max),calc(100% - 28px));margin:auto}.topbar{position:sticky;top:0;z-index:10;border-bottom:1px solid rgba(138,255,189,.15);background:rgba(6,17,14,.93);backdrop-filter:blur(14px)}.topbar .shell{min-height:64px;display:flex;align-items:center;justify-content:space-between;gap:12px}.brand{color:var(--text);font-size:19px;font-weight:950;line-height:1.1;text-decoration:none}.brand small{display:block;margin-top:4px;color:var(--mint);font-size:9px;letter-spacing:.18em}.home-link{min-height:42px;display:inline-flex;align-items:center;padding:0 13px;border:1px solid var(--line);border-radius:9px;color:var(--muted);font-size:12px;font-weight:850;text-decoration:none}.hero{padding:52px 0 30px}.eyebrow{margin:0 0 8px;color:var(--green);font-size:11px;font-weight:900;letter-spacing:.16em}.hero h1{max-width:720px;margin:0;font-size:clamp(38px,8vw,72px);line-height:1.08;letter-spacing:-.04em}.hero p{max-width:650px;margin:18px 0 0;color:var(--muted);font-weight:650}.tool-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;padding:10px 0 54px}.tool-card{min-height:132px;display:flex;flex-direction:column;justify-content:space-between;padding:17px;border:1px 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span{color:var(--muted);font-size:12px;font-weight:750}.result output{max-width:68%;color:var(--mint);font-size:18px;font-weight:950;text-align:right;overflow-wrap:anywhere}.result.hero-result{min-height:82px;border-color gadient}.result.hero-result output{color:var(--yellow);font-size:25px}.note{margin:13px 0 0;color:#7f9e91;font-size:11px}.copy-status{min-height:20px;margin:8px 0 0;color:var(--green);font-size:11px}.memo{min-height:300px;resize:vertical;font-size:15px;font-weight:650}.density-table{display:grid;gap:7px}.density-row{display:flex;justify-content:space-between;gap:12px;padding:10px 12px;border-bottom:1px solid rgba(138,255,189,.12)}.density-row span{color:var(--muted)}.calc-display{min-height:96px;display:flex;flex-direction:column;align-items:flex-end;justify-content:center;padding:13px;border:1px solid var(--line);border-radius:12px;background:#020806;overflow:hidden}.calc-display small{min-height:19px;color:var(--muted)}.calc-display output{max-width:100%;font-size:38px;font-weight:950;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.keypad{display:grid;grid-template-columns:repeat(4,1fr);gap:7px;margin-top:10px}.key{min-height:54px;border:1px solid var(--line);border-radius:10px;background:#0d241c;color:var(--text);font-size:18px;font-weight:900}.key.op{color:var(--green)}.key.eq{background:var(--green);color:#03120d}.footer{padding:22px 0 38px;border-top:1px solid rgba(138,255,189,.15);color:#789589;font-size:11px}.hidden{display:none!important}@media(max-width:720px){.tool-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.workspace{grid-template-columns:1fr}.hero{padding-top:36px}.panel{padding:15px}}@media(max-width:420px){.shell{width:calc(100% - 20px)}.topbar .shell{min-height:58px}.brand{font-size:17px}.hero h1{font-size:39px}.tool-grid{gap:8px}.tool-card{min-height:116px;padding:14px}.tool-card strong{font-size:16px}.fields{grid-template-columns:1fr}.field.full{grid-column:auto}.result output{font-size:17px}.result.hero-result output{font-size:23px}}