/* Layout: dark Compound Cave header + coloured banner per calculator; tool = inputs | result card; stacks on phones.
   Each calculator has its own colour (EMI blue, SIP green, FD violet, GST orange, Salary teal); brand gold ties them together. */
:root{
  --bg:#F4F6F3; --surface:#FFFFFF; --ink:#14201B; --muted:#56635D; --line:#DCE3DE; --chip:#EDF1EC;
  --gold:#F5BE3C; --gold-ink:#8F5B00; --on-gold:#1A1406;
  --cave:#0F1A16; --cave-2:#16241F; --on-cave:#F3F1E8; --on-cave-muted:#A9B8B1;
  --pos:#1B7A4A; --neg:#B4462F;
  /* calculator colours: band (deep, white text) / tone (accents on page) / soft (tinted surfaces) */
  --b-emi:#1F4F8F; --t-emi:#2563A8; --s-emi:#E6EEF9;
  --b-sip:#16704A; --t-sip:#1C8752; --s-sip:#E2F3E9;
  --b-fd:#5A3A9E;  --t-fd:#6B45B6;  --s-fd:#EEE8FA;
  --b-gst:#B44D1C; --t-gst:#C4541E; --s-gst:#FCEADF;
  --b-salary:#0B6B6B; --t-salary:#0D7F7F; --s-salary:#DEF2F1;
  --f-display:"Poppins","Hind","Noto Sans Devanagari",system-ui,sans-serif;
  --f-body:"Hind","Noto Sans Devanagari",system-ui,sans-serif;
  --r:16px;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --bg:#0B110F; --surface:#141D1A; --ink:#EEF3EF; --muted:#9DABA4; --line:#26312C; --chip:#1B2622;
  --gold-ink:#F5BE3C; --pos:#55CE90; --neg:#F3836A;
  --t-emi:#7BB0F0; --s-emi:#14233A; --t-sip:#56D092; --s-sip:#11281D; --t-fd:#B79BF3; --s-fd:#211A34;
  --t-gst:#F49C6B; --s-gst:#33200F; --t-salary:#4FCDC9; --s-salary:#0E2A2A; color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#0B110F; --surface:#141D1A; --ink:#EEF3EF; --muted:#9DABA4; --line:#26312C; --chip:#1B2622;
  --gold-ink:#F5BE3C; --pos:#55CE90; --neg:#F3836A;
  --t-emi:#7BB0F0; --s-emi:#14233A; --t-sip:#56D092; --s-sip:#11281D; --t-fd:#B79BF3; --s-fd:#211A34;
  --t-gst:#F49C6B; --s-gst:#33200F; --t-salary:#4FCDC9; --s-salary:#0E2A2A; color-scheme:dark}

/* per-page colour */
.site{--band:var(--cave);--tone:var(--gold-ink);--soft:var(--chip);--fill:var(--gold)}
.site[data-page="emi"],.t-emi{--band:var(--b-emi);--tone:var(--t-emi);--soft:var(--s-emi);--fill:var(--b-emi)}
.site[data-page="sip"],.t-sip{--band:var(--b-sip);--tone:var(--t-sip);--soft:var(--s-sip);--fill:var(--b-sip)}
.site[data-page="fd"],.t-fd{--band:var(--b-fd);--tone:var(--t-fd);--soft:var(--s-fd);--fill:var(--b-fd)}
.site[data-page="gst"],.t-gst{--band:var(--b-gst);--tone:var(--t-gst);--soft:var(--s-gst);--fill:var(--b-gst)}
.site[data-page="salary"],.t-salary{--band:var(--b-salary);--tone:var(--t-salary);--soft:var(--s-salary);--fill:var(--b-salary)}

*{box-sizing:border-box}
[hidden]{display:none!important}
body{background:var(--bg);color:var(--ink);font-family:var(--f-body);font-size:17px;line-height:1.6;margin:0}
.wrap{max-width:1100px;margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
a{color:var(--tone)}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid var(--gold);outline-offset:2px}
h1,h2,h3{font-family:var(--f-display);line-height:1.25;text-wrap:balance}

/* header */
header.top{background:var(--cave);color:var(--on-cave);border-bottom:3px solid var(--gold)}
header.top .wrap{display:flex;flex-wrap:wrap;align-items:center;gap:8px 20px;padding-block:10px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--on-cave);font-family:var(--f-display);font-weight:700;font-size:20px;line-height:1.15}
.brand img{border-radius:50%;box-shadow:0 0 0 2px var(--gold)}
.brand small{display:block;font-family:var(--f-body);font-weight:600;font-size:12px;color:var(--gold);letter-spacing:.06em;text-transform:uppercase}
nav.links{display:flex;flex-wrap:wrap;gap:4px;margin-left:auto}
nav.links a{text-decoration:none;color:var(--on-cave-muted);padding:6px 12px;border-radius:999px;font-size:15px;font-weight:600}
nav.links a:hover{color:var(--on-cave)}
nav.links a[aria-current="page"]{background:var(--gold);color:var(--on-gold)}

/* calculator banner */
.pagehead{background:var(--band) radial-gradient(120% 140% at 100% 0%,rgba(255,255,255,.18),transparent 55%);color:#fff;position:relative;overflow:hidden}
.pagehead::after{content:"₹";position:absolute;right:-10px;bottom:-70px;font:700 260px/1 var(--f-display);color:rgba(255,255,255,.08);pointer-events:none}
.pagehead .wrap{display:flex;align-items:center;gap:18px;padding-block:28px 34px;position:relative;z-index:1}
.pagehead h1{margin:0;font-size:clamp(28px,4.6vw,42px);color:#fff}
.pagehead p{margin:6px 0 0;max-width:62ch;color:rgba(255,255,255,.88)}
.ph-icon{flex:none;width:64px;height:64px;border-radius:18px;background:var(--gold);color:var(--on-gold);display:grid;place-items:center;box-shadow:0 8px 20px rgba(0,0,0,.25)}
.ph-icon .ic{width:34px;height:34px}
@media (max-width:520px){.ph-icon{width:48px;height:48px;border-radius:14px}.ph-icon .ic{width:26px;height:26px}}

/* home cover */
.cover{background:var(--cave) radial-gradient(60% 80% at 78% 45%,rgba(245,190,60,.28),transparent 60%);color:var(--on-cave);overflow:hidden}
.cover-grid{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);gap:24px;align-items:center;padding-block:44px 52px}
@media (max-width:820px){.cover-grid{grid-template-columns:minmax(0,1fr);padding-block:32px 36px}}
.eyebrow{display:inline-block;font-weight:600;font-size:13px;letter-spacing:.08em;text-transform:uppercase;color:var(--gold);border:1px solid rgba(245,190,60,.5);border-radius:999px;padding:4px 12px}
.cover h1{font-size:clamp(34px,6vw,60px);margin:14px 0 10px;color:var(--on-cave)}
.cover h1 em{font-style:normal;color:var(--gold)}
.cover p{color:var(--on-cave-muted);max-width:52ch;margin:0 0 20px;font-size:18px}
.cta-row{display:flex;flex-wrap:wrap;gap:10px}
.btn{display:inline-block;background:var(--gold);color:var(--on-gold);font-weight:700;text-decoration:none;padding:11px 20px;border-radius:999px;font-size:16px}
.btn:hover{filter:brightness(1.06)}
.btn.ghost{background:transparent;color:var(--on-cave);box-shadow:inset 0 0 0 2px rgba(243,241,232,.45)}
.facts{list-style:none;display:flex;flex-wrap:wrap;gap:8px 22px;padding:0;margin:24px 0 0;color:var(--on-cave-muted);font-size:15px}
.facts b{color:var(--gold);font-family:var(--f-display);font-size:20px;margin-right:4px}
.cover-art{position:relative;min-height:300px;display:grid;place-items:center}
.halo{width:240px;height:240px;border-radius:50%;display:grid;place-items:center;background:radial-gradient(circle,rgba(245,190,60,.35),transparent 70%);animation:float 6s ease-in-out infinite}
.halo img{border-radius:50%;box-shadow:0 0 0 4px var(--gold),0 20px 50px rgba(0,0,0,.5);max-width:100%;height:auto}
.float{position:absolute;background:var(--cave-2);border:1px solid rgba(245,190,60,.35);color:var(--on-cave);border-radius:12px;padding:6px 12px;font-size:14px;box-shadow:0 10px 24px rgba(0,0,0,.35);white-space:nowrap}
.float b{font-family:var(--f-display);color:var(--gold);margin-left:4px}
.dot{display:inline-block;width:9px;height:9px;border-radius:50%;margin-right:6px;vertical-align:middle}
.dot.emi{background:#5B9BE6}.dot.sip{background:#46C483}.dot.gst{background:#F08A52}.dot.fd{background:#A784EE}
.f1{top:6%;left:2%}.f2{top:14%;right:0}.f3{bottom:12%;left:6%}.f4{bottom:4%;right:6%}
@media (max-width:820px){.cover-art{min-height:0;display:flex;flex-wrap:wrap;justify-content:center;gap:8px}.halo{width:100%;height:auto;margin:0 0 6px;background:none}.halo img{width:150px}.float{position:static}}
@keyframes float{50%{transform:translateY(-8px)}}

/* home cards */
.section-title{font-size:clamp(24px,3.4vw,32px);margin:34px 0 14px}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,300px),1fr));gap:14px;margin:0 0 28px}
.card{display:grid;gap:6px;align-content:start;text-decoration:none;color:var(--ink);background:var(--soft);border:1px solid transparent;border-radius:var(--r);padding:20px;transition:transform .15s,box-shadow .15s}
.card:hover{transform:translateY(-3px);box-shadow:0 12px 26px rgba(0,0,0,.12);border-color:var(--tone)}
.card b{font-family:var(--f-display);font-size:21px;color:var(--ink)}
.card .eg{font-size:15px;color:var(--muted);margin-top:4px}
.card .eg strong{color:var(--tone);font-family:var(--f-display);font-variant-numeric:tabular-nums}
.ic.tile{width:48px;height:48px;padding:11px;border-radius:14px;background:var(--fill);color:#fff;margin-bottom:6px}

/* tool */
main.wrap{padding-bottom:8px}
.tool{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:20px;align-items:start;margin-top:-18px;position:relative;z-index:2}
@media (max-width:760px){.tool{grid-template-columns:minmax(0,1fr)}}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:22px;display:grid;gap:18px;min-width:0;box-shadow:0 10px 30px rgba(10,20,16,.08)}
.field{display:grid;gap:6px}
.field .row{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px 12px}
.field label,.field>span{font-weight:600}
.box{display:flex;align-items:center;border:2px solid var(--line);border-radius:12px;background:var(--bg);overflow:hidden;max-width:230px}
.box:focus-within{border-color:var(--tone)}
.box span{padding:0 10px;color:var(--tone);font-weight:700;font-variant-numeric:tabular-nums}
.box input{border:0;background:transparent;color:var(--ink);font:600 18px var(--f-display);padding:8px 10px;width:100%;min-width:0;text-align:right;font-variant-numeric:tabular-nums;outline:none}
input[type=range]{width:100%;accent-color:var(--tone);height:22px}
.words{font-size:14px;color:var(--tone);font-weight:600}
.seg{display:flex;flex-wrap:wrap;gap:6px}
.seg button{font:600 15px var(--f-body);border:2px solid var(--line);background:var(--surface);color:var(--ink);padding:5px 14px;border-radius:999px;cursor:pointer}
.seg button:hover{border-color:var(--tone)}
.seg button[aria-pressed="true"]{background:var(--fill);border-color:var(--fill);color:#fff}
select{font:inherit;color:var(--ink);background:var(--bg);border:2px solid var(--line);border-radius:12px;padding:8px 10px;max-width:100%}
.result{position:sticky;top:12px;background:var(--soft);border-color:transparent}
.result .big-label{color:var(--muted);font-size:15px;font-weight:600}
.big{font-family:var(--f-display);font-weight:700;font-size:clamp(34px,5.4vw,48px);line-height:1.1;font-variant-numeric:tabular-nums;color:var(--tone)}
.kv{display:grid;gap:8px;margin:0}
.kv div{display:flex;justify-content:space-between;gap:12px;border-top:1px dashed var(--line);padding-top:8px}
.kv dt{color:var(--muted)} .kv dd{margin:0;font-weight:700;font-variant-numeric:tabular-nums;text-align:right}
.pos{color:var(--pos)} .neg{color:var(--neg)}
.split{display:flex;align-items:center;gap:16px}
.donut{width:120px;height:120px;border-radius:50%;flex:none;background:conic-gradient(var(--fill) 0 var(--p,50%),var(--gold) var(--p,50%) 100%);display:grid;place-items:center;transition:background .3s}
.donut::after{content:"";width:70px;height:70px;border-radius:50%;background:var(--soft)}
.legend{display:grid;gap:6px;font-size:15px}
.legend i{display:inline-block;width:12px;height:12px;border-radius:4px;margin-right:6px;vertical-align:middle}
.note{font-size:14px;color:var(--muted)}
h2{font-size:24px}
main > h2{margin:34px 0 10px}
.tablewrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r);background:var(--surface)}
table{border-collapse:collapse;width:100%;font-variant-numeric:tabular-nums;font-size:15px}
th,td{padding:9px 12px;text-align:right;border-bottom:1px solid var(--line);white-space:nowrap}
th:first-child,td:first-child{text-align:left}
thead th{background:var(--fill);color:#fff;font-weight:600}
tbody tr:nth-child(even){background:var(--soft)}
.content{max-width:74ch}
.content h2{margin:36px 0 8px}
.content h3{font-size:19px;margin:18px 0 4px;color:var(--tone)}
.formula{font-family:var(--f-display);background:var(--soft);border-left:4px solid var(--tone);border-radius:10px;padding:12px 16px;overflow-x:auto}
details{border-top:1px solid var(--line);padding:10px 0}
details summary{cursor:pointer;font-weight:600}
details summary::marker{color:var(--tone)}
.yt{display:flex;flex-wrap:wrap;align-items:center;gap:14px 18px;background:var(--cave);color:var(--on-cave);border-radius:var(--r);padding:18px 20px;margin:36px 0}
.yt img{border-radius:50%;box-shadow:0 0 0 2px var(--gold)}
.yt > div{flex:1 1 220px;min-width:0}
.yt .note{color:var(--on-cave-muted)}
.ad-slot:empty{display:none}
.ad-slot{margin:22px 0;min-height:90px}
footer{background:var(--cave);color:var(--on-cave-muted);margin-top:40px}
footer .wrap{padding-block:22px;display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;font-size:14px}
footer a{color:var(--on-cave-muted)}
footer .brand.small{font-size:16px}
footer .fnote{flex-basis:100%}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}

/* language menu */
.lang{position:relative}
.lang summary{list-style:none;display:flex;align-items:center;gap:6px;cursor:pointer;color:var(--on-cave);border:1px solid rgba(245,190,60,.55);border-radius:999px;padding:5px 12px;font-weight:600;font-size:14px}
.lang summary::-webkit-details-marker{display:none}
.lang summary .ic{width:18px;height:18px;color:var(--gold)}
.lang[open] summary{background:var(--gold);color:var(--on-gold)} .lang[open] summary .ic{color:var(--on-gold)}
.lang-pop{position:absolute;right:0;top:calc(100% + 8px);z-index:20;background:var(--surface);color:var(--ink);border:1px solid var(--line);border-radius:14px;box-shadow:0 16px 40px rgba(0,0,0,.25);padding:8px;display:grid;gap:2px;min-width:200px}
.lang-pop a{color:var(--ink);text-decoration:none;padding:7px 10px;border-radius:8px;font-weight:600}
.lang-pop a:hover{background:var(--chip)}
.lang-pop a[aria-current]{background:var(--gold);color:var(--on-gold)}
.lang-pop small{font-weight:400;color:var(--muted);font-size:12px}
.lang-note{font-size:12px;color:var(--muted);padding:6px 10px 2px;border-top:1px solid var(--line);margin-top:4px}
@media (max-width:640px){.lang{margin-left:auto}}
/* articles */
.article{padding-top:22px}
.article .meta{color:var(--muted);font-size:14px;margin:0 0 6px}
.article ul{padding-left:22px} .article li{margin:6px 0}
.article .tablewrap{margin:14px 0}
.calc-cta{display:flex;flex-wrap:wrap;align-items:center;gap:14px;background:var(--soft);border-radius:var(--r);padding:16px 18px;margin:26px 0}
.calc-cta > div{flex:1 1 200px;min-width:0}
.calc-cta .ic.tile{margin:0}
.btn.solid{background:var(--fill);color:#fff}
ul.more{padding-left:20px} ul.more a{font-weight:600}
.lang{border-top:0;padding:0}
@media (max-width:640px){
 header.top .wrap{gap:8px 10px}
 .lang{order:2;margin-left:auto}
 nav.links{order:3;flex-basis:100%;flex-wrap:nowrap;overflow-x:auto;margin-left:0;scrollbar-width:none;padding-bottom:2px}
 nav.links::-webkit-scrollbar{display:none}
 nav.links a{flex:none}
 .brand{font-size:18px}
}

/* reverse calculation + GST rate list */
.note.warn{color:#b42318;background:#fef3f2;border:1px solid #fecdca;border-radius:10px;padding:10px 12px;margin:8px 0 0}
.gstlist{margin:28px 0}
.gstlist input[type=search]{width:100%;box-sizing:border-box;font:inherit;font-size:1rem;padding:12px 14px;border:1.5px solid var(--line);border-radius:12px;margin:6px 0 12px;background:var(--surface);color:inherit}
.gst-table td,.gst-table th{vertical-align:middle}
.gst-table td:first-child,.gst-table th:first-child{white-space:normal;text-align:left;width:auto}
.gst-table td:nth-child(2){text-align:center}
.gst-table tr.cat th{text-align:left;background:var(--chip);font-weight:700;padding-top:10px;padding-bottom:10px}
.gst-table td:nth-child(2),.gst-table td:nth-child(3){white-space:nowrap;width:1%}
.rate{display:inline-block;min-width:3.2em;text-align:center;padding:3px 8px;border-radius:999px;font-weight:700;font-size:.9rem;color:#fff}
.rate.r0{background:#16a34a}.rate.r3{background:#b7791f}.rate.r5{background:#0d9488}.rate.r18{background:#2563eb}.rate.r40{background:#dc2626}.rate.rx{background:#6b7280;font-weight:600}
.gst-table .use{font:inherit;font-size:.85rem;padding:5px 10px;border-radius:8px;border:1.5px solid currentColor;background:transparent;color:var(--t-gst);cursor:pointer}
.gst-table .use:hover{background:var(--t-gst);color:#fff}
@media (max-width:480px){.gst-table td,.gst-table th{padding:8px 6px;font-size:.92rem}.gst-table .use{padding:4px 7px}}
@media (prefers-color-scheme:dark){.note.warn{background:#3b1513;border-color:#7a271a;color:#fecdca}}