/* ===== 8calc.com v2 — neon glass ===== */
:root{
  --bg0:#0a0a16; --bg1:#11112a;
  --glass:rgba(255,255,255,.06); --stroke:rgba(255,255,255,.14); --stroke-hi:rgba(45,212,191,.55);
  --text:#eef2fb; --muted:#9aa8c0;
  --accent:#10b981; --accent-2:#22d3ee; --violet:#8b5cf6; --pink:#ec4899; --amber:#f59e0b; --orange:#f97316;
  --accent-glow:rgba(34,211,238,.4);
  --radius:20px;
  --display:'Space Grotesk',system-ui,sans-serif;
  --body:'Inter',system-ui,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg0);color:var(--text);font-family:var(--body);font-size:16.5px;line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:hidden}
.aurora{position:fixed;inset:0;z-index:-1;background:var(--bg0)}
.aurora::before,.aurora::after{content:"";position:absolute;width:65vmax;height:65vmax;border-radius:50%;filter:blur(85px);opacity:.5}
.aurora::before{background:radial-gradient(circle,#10b981 0%,#22d3ee 40%,transparent 65%);top:-25vmax;right:-18vmax;animation:drift1 22s ease-in-out infinite alternate}
.aurora::after{background:radial-gradient(circle,#8b5cf6 0%,#ec4899 45%,transparent 68%);bottom:-28vmax;left:-20vmax;animation:drift2 28s ease-in-out infinite alternate}
@keyframes drift1{to{transform:translate(-9vmax,11vmax) scale(1.15)}}
@keyframes drift2{to{transform:translate(11vmax,-9vmax) scale(1.1)}}
@media (prefers-reduced-motion:reduce){.aurora::before,.aurora::after{animation:none}*{transition:none!important;animation:none!important}}
a{color:var(--accent-2);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1120px;margin:0 auto;padding:0 22px}
header.site{position:sticky;top:0;z-index:50;backdrop-filter:blur(18px);background:rgba(10,10,22,.7);border-bottom:1px solid var(--stroke)}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;height:70px}
.logo{font-family:var(--display);font-weight:700;font-size:26px;display:flex;align-items:center;gap:11px;
  background:linear-gradient(90deg,#34d399,#22d3ee,#a78bfa);-webkit-background-clip:text;background-clip:text;color:transparent}
.logo .eight{display:inline-grid;place-items:center;width:44px;height:44px;border-radius:13px;color:#04150f;font-size:25px;
  background:linear-gradient(135deg,#10b981,#22d3ee 55%,#8b5cf6);
  box-shadow:0 0 22px rgba(34,211,238,.55),0 6px 18px rgba(0,0,0,.45);position:relative;overflow:hidden;transform:rotate(-4deg)}
.logo .eight::after{content:"";position:absolute;top:-60%;left:-60%;width:60%;height:220%;transform:rotate(25deg);
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.55),transparent);animation:shine 4s ease-in-out infinite}
@keyframes shine{0%,70%{left:-80%}100%{left:140%}}
.logo:hover{text-decoration:none}
nav.main a{color:var(--muted);margin-left:24px;font-size:15px;font-weight:600}
nav.main a:hover{color:#fff;text-decoration:none}
.hero{padding:70px 0 26px}
.hero h1{font-family:var(--display);font-size:clamp(38px,6vw,64px);line-height:1.06;margin:0 0 16px;color:#fff;letter-spacing:-.02em}
.hero h1 em{font-style:normal;background:linear-gradient(90deg,#34d399,#22d3ee,#a78bfa,#f472b6,#34d399);background-size:300% 100%;
  -webkit-background-clip:text;background-clip:text;color:transparent;animation:rainbow 7s linear infinite}
@keyframes rainbow{to{background-position:300% 0}}
.hero p.lead{font-size:19px;color:var(--muted);max-width:48ch;margin:0 0 8px}
.glass{background:var(--glass);border:1px solid var(--stroke);border-radius:var(--radius);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
  box-shadow:0 20px 55px rgba(0,0,0,.45), inset 0 1px 0 rgba(255,255,255,.08)}
/* tool finder */
.finder{display:flex;gap:10px;flex-wrap:wrap;align-items:center;margin:26px 0 6px}
.finder input{flex:1;min-width:240px;padding:15px 20px;font-size:17px;color:#fff;font-family:var(--body);
  background:rgba(255,255,255,.07);border:1px solid var(--stroke);border-radius:999px;outline:none;transition:border-color .2s,box-shadow .2s}
.finder input:focus{border-color:var(--accent-2);box-shadow:0 0 0 4px rgba(34,211,238,.18)}
.chips{display:flex;gap:8px;flex-wrap:wrap;margin:14px 0 0}
.chip{padding:9px 18px;border-radius:999px;font-family:var(--display);font-weight:600;font-size:14px;cursor:pointer;
  background:rgba(255,255,255,.06);border:1px solid var(--stroke);color:var(--muted);transition:all .2s}
.chip:hover{color:#fff;transform:translateY(-1px)}
.chip.active{color:#0a0a16;border-color:transparent}
.chip[data-cat="all"].active{background:linear-gradient(135deg,#34d399,#22d3ee)}
.chip[data-cat="finance"].active{background:linear-gradient(135deg,#fbbf24,#f59e0b)}
.chip[data-cat="health"].active{background:linear-gradient(135deg,#34d399,#10b981)}
.chip[data-cat="fitness"].active{background:linear-gradient(135deg,#fb923c,#f97316)}
.chip[data-cat="math"].active{background:linear-gradient(135deg,#a78bfa,#8b5cf6)}
.chip[data-cat="lifestyle"].active{background:linear-gradient(135deg,#f472b6,#ec4899)}
/* grid + cards */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(248px,1fr));gap:18px;margin:30px 0 60px}
.card{position:relative;padding:24px 22px 20px;display:block;color:var(--text);transition:transform .22s,box-shadow .22s,border-color .22s;overflow:hidden;border-top:3px solid transparent}
.card:hover{transform:translateY(-6px) scale(1.01);text-decoration:none}
.card .glyph{font-size:29px;width:56px;height:56px;display:grid;place-items:center;border-radius:16px;margin-bottom:14px;border:1px solid rgba(255,255,255,.18)}
.card h3{font-family:var(--display);font-size:19.5px;margin:0 0 6px;color:#fff}
.card p{font-size:13.8px;color:var(--muted);margin:0 0 10px;line-height:1.55}
.card .go{position:absolute;top:20px;right:18px;font-size:18px;opacity:0;transition:opacity .2s,transform .2s;transform:translateX(-5px)}
.card:hover .go{opacity:1;transform:none}
.badge{display:inline-block;font-size:10.5px;font-weight:700;letter-spacing:.1em;text-transform:uppercase;padding:4px 11px;border-radius:999px}
.cat-finance{border-top-color:#f59e0b}.cat-finance .glyph{background:linear-gradient(135deg,rgba(251,191,36,.3),rgba(245,158,11,.12))}.cat-finance .badge{background:rgba(245,158,11,.18);color:#fbbf24}.cat-finance .go{color:#fbbf24}.cat-finance:hover{box-shadow:0 22px 55px rgba(0,0,0,.5),0 0 36px -8px rgba(245,158,11,.5);border-color:rgba(245,158,11,.5)}
.cat-health{border-top-color:#10b981}.cat-health .glyph{background:linear-gradient(135deg,rgba(52,211,153,.3),rgba(16,185,129,.12))}.cat-health .badge{background:rgba(16,185,129,.18);color:#34d399}.cat-health .go{color:#34d399}.cat-health:hover{box-shadow:0 22px 55px rgba(0,0,0,.5),0 0 36px -8px rgba(16,185,129,.5);border-color:rgba(16,185,129,.5)}
.cat-fitness{border-top-color:#f97316}.cat-fitness .glyph{background:linear-gradient(135deg,rgba(251,146,60,.3),rgba(249,115,22,.12))}.cat-fitness .badge{background:rgba(249,115,22,.18);color:#fb923c}.cat-fitness .go{color:#fb923c}.cat-fitness:hover{box-shadow:0 22px 55px rgba(0,0,0,.5),0 0 36px -8px rgba(249,115,22,.5);border-color:rgba(249,115,22,.5)}
.cat-math{border-top-color:#8b5cf6}.cat-math .glyph{background:linear-gradient(135deg,rgba(167,139,250,.3),rgba(139,92,246,.12))}.cat-math .badge{background:rgba(139,92,246,.18);color:#a78bfa}.cat-math .go{color:#a78bfa}.cat-math:hover{box-shadow:0 22px 55px rgba(0,0,0,.5),0 0 36px -8px rgba(139,92,246,.5);border-color:rgba(139,92,246,.5)}
.cat-lifestyle{border-top-color:#ec4899}.cat-lifestyle .glyph{background:linear-gradient(135deg,rgba(244,114,182,.3),rgba(236,72,153,.12))}.cat-lifestyle .badge{background:rgba(236,72,153,.18);color:#f472b6}.cat-lifestyle .go{color:#f472b6}.cat-lifestyle:hover{box-shadow:0 22px 55px rgba(0,0,0,.5),0 0 36px -8px rgba(236,72,153,.5);border-color:rgba(236,72,153,.5)}
/* calculator widget */
.calc{padding:30px;margin:26px 0 8px}
.calc h2.widget-title{font-family:var(--display);margin:0 0 18px;font-size:22px;color:#fff}
.field{margin-bottom:15px}
.field label{display:block;font-size:13px;font-weight:600;letter-spacing:.03em;color:var(--muted);margin-bottom:6px}
.field input,.field select{width:100%;padding:13px 15px;font-size:16.5px;color:#fff;font-family:var(--body);
  background:rgba(255,255,255,.07);border:1px solid var(--stroke);border-radius:13px;outline:none;transition:border-color .2s,box-shadow .2s}
.field input:focus,.field select:focus{border-color:var(--accent-2);box-shadow:0 0 0 4px rgba(34,211,238,.16)}
.field select option{background:var(--bg1)}
.cols{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media(max-width:560px){.cols{grid-template-columns:1fr}}
.btn{display:inline-block;width:100%;padding:16px;border:none;border-radius:13px;cursor:pointer;
  font-family:var(--display);font-weight:700;font-size:17px;color:#04150f;
  background:linear-gradient(135deg,#34d399,#22d3ee);background-size:150% 100%;
  box-shadow:0 12px 30px -8px var(--accent-glow);transition:transform .15s,box-shadow .2s,background-position .3s}
.btn:hover{transform:translateY(-2px);box-shadow:0 16px 36px -8px var(--accent-glow);background-position:100% 0}
.results{margin-top:22px;padding:22px 24px;border-radius:16px;background:linear-gradient(135deg,rgba(16,185,129,.12),rgba(34,211,238,.07));
  border:1px solid rgba(34,211,238,.3);display:none}
.results.show{display:block;animation:pop .35s ease}
@keyframes pop{from{opacity:0;transform:scale(.97)}to{opacity:1;transform:none}}
.results .big{font-family:var(--display);font-size:clamp(32px,4.6vw,44px);font-weight:700;color:#fff;font-variant-numeric:tabular-nums;line-height:1.15}
.results .big small{font-size:14.5px;background:linear-gradient(90deg,#34d399,#22d3ee);-webkit-background-clip:text;background-clip:text;color:transparent;font-weight:700;display:block;letter-spacing:.08em;text-transform:uppercase;margin-bottom:5px}
.results .rows{margin-top:12px;border-top:1px solid rgba(255,255,255,.12);padding-top:10px}
.results .row{display:flex;justify-content:space-between;font-size:14.5px;padding:5.5px 0;gap:14px}
.results .row b{color:#fff;font-variant-numeric:tabular-nums}
.results .row span{color:var(--muted)}
article.content{max-width:760px;margin:46px auto 70px;padding:0 22px}
article.content h1{font-family:var(--display);font-size:clamp(32px,4.8vw,44px);line-height:1.1;color:#fff;letter-spacing:-.015em;margin:30px 0 10px}
article.content h2{font-family:var(--display);font-size:24px;color:#fff;margin:38px 0 12px}
article.content p,article.content li{color:#c7d2e4;font-size:16.5px}
article.content .sub{color:var(--muted);font-size:18px;margin-top:0}
.formula{font-family:'Space Grotesk',monospace;background:var(--glass);border:1px solid var(--stroke);
  border-left:4px solid;border-image:linear-gradient(180deg,#34d399,#22d3ee) 1;border-radius:0 12px 12px 0;padding:16px 20px;font-size:17px;color:#fff;overflow-x:auto}
details.faq{background:var(--glass);border:1px solid var(--stroke);border-radius:13px;margin-bottom:10px;padding:0 18px}
details.faq summary{cursor:pointer;font-weight:600;color:#fff;padding:15px 0;font-size:15.5px;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:12px}
details.faq summary::after{content:"+";color:var(--accent-2);font-size:21px;font-family:var(--display);flex-shrink:0}
details.faq[open] summary::after{content:"\2013"}
details.faq p{margin:0 0 16px}
.crumbs{font-size:13.5px;color:var(--muted);margin:26px 0 0}
footer.site{border-top:1px solid var(--stroke);background:rgba(10,10,22,.65);backdrop-filter:blur(16px);margin-top:30px}
footer.site .wrap{padding:38px 22px;display:grid;grid-template-columns:2fr 1fr 1fr;gap:26px}
@media(max-width:700px){footer.site .wrap{grid-template-columns:1fr}}
footer.site h4{font-family:var(--display);color:#fff;font-size:15px;margin:0 0 10px}
footer.site a{display:block;color:var(--muted);font-size:14px;padding:3px 0}
footer.site a:hover{color:var(--accent-2)}
footer.site .fine{grid-column:1/-1;border-top:1px solid var(--stroke);padding-top:16px;font-size:12.5px;color:var(--muted)}
/* mini calc — full size */
.minicalc{padding:24px;width:min(420px,100%)}
.minicalc .screen{font-family:var(--display);font-variant-numeric:tabular-nums;background:rgba(0,0,0,.45);
  border:1px solid var(--stroke);border-radius:14px;padding:18px 20px;font-size:38px;text-align:right;color:#fff;
  margin-bottom:14px;min-height:76px;word-break:break-all;box-shadow:inset 0 2px 10px rgba(0,0,0,.5)}
.minicalc .keys{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.minicalc button{padding:17px 0;font-size:21px;font-family:var(--display);font-weight:700;border-radius:13px;cursor:pointer;
  background:rgba(255,255,255,.08);border:1px solid var(--stroke);color:#fff;transition:background .15s,transform .1s,box-shadow .15s}
.minicalc button:hover{background:rgba(255,255,255,.16);transform:translateY(-1px)}
.minicalc button:active{transform:scale(.95)}
.minicalc button.op{background:linear-gradient(135deg,rgba(139,92,246,.35),rgba(34,211,238,.2));border-color:rgba(167,139,250,.4);color:#c4b5fd}
.minicalc button.eq{background:linear-gradient(135deg,#34d399,#22d3ee);color:#04150f;grid-column:span 2;box-shadow:0 8px 20px -6px var(--accent-glow)}
.hero-flex{display:flex;gap:46px;align-items:center;flex-wrap:wrap;justify-content:space-between}
.hero-flex>div:first-child{flex:1;min-width:300px}
h2.section{font-family:var(--display);color:#fff;font-size:27px;margin:8px 0 0}
.count-pill{display:inline-block;margin-left:10px;font-size:13px;font-weight:700;padding:4px 13px;border-radius:999px;background:linear-gradient(135deg,rgba(52,211,153,.25),rgba(34,211,238,.18));border:1px solid rgba(34,211,238,.35);color:#67e8f9;vertical-align:middle}