@import url('https://fonts.googleapis.com/css2?family=DM+Mono:wght@400;500&family=Space+Grotesk:wght@400;500;600;700&display=swap');

:root { --ink:#202620; --muted:#5f685e; --paper:#f5f0e6; --paper-dark:#e9e1d2; --line:#d2c8b8; --green:#3d7655; --green-soft:#dbe9dc; --amber:#b87724; --red:#a95045; --dark:#242b25; --white:#fffdf8; --radius:18px; }
* { box-sizing:border-box; }
html { scroll-behavior:smooth; }
body { margin:0; background:var(--paper); color:var(--ink); font-family:"Space Grotesk",sans-serif; font-size:17px; line-height:1.6; }
a { color:inherit; text-decoration-thickness:1px; text-underline-offset:3px; }
img { display:block; max-width:100%; }
.wrap { width:min(1120px, calc(100% - 40px)); margin:auto; }
.narrow { width:min(780px, calc(100% - 40px)); margin-left:auto; margin-right:auto; }
.skip-link { position:fixed; left:14px; top:-60px; z-index:10; padding:9px 14px; background:var(--ink); color:white; border-radius:5px; }.skip-link:focus { top:14px; }
.site-header { position:sticky; top:0; z-index:5; border-bottom:1px solid transparent; background:color-mix(in srgb,var(--paper) 92%,transparent); backdrop-filter:blur(12px); }.site-header:has(.nav) { border-bottom-color:var(--line); }
.nav { min-height:74px; display:flex; align-items:center; justify-content:space-between; gap:20px; }
.wordmark { text-decoration:none; font-weight:700; letter-spacing:-.7px; white-space:nowrap; }.wordmark em { font-weight:400; font-style:normal; }.mark { display:inline-grid; place-items:center; width:27px; height:27px; margin-right:6px; border-radius:6px; background:var(--green); color:white; font-family:"DM Mono",monospace; font-size:14px; }
.nav-links { display:flex; align-items:center; gap:22px; font-size:14px; font-weight:500; }.nav-links a { text-decoration:none; }.nav-links a:not(.nav-tool):hover { text-decoration:underline; }.nav-tool { padding:9px 12px; border:1px solid var(--green); border-radius:999px; color:var(--green); }.menu-toggle { display:none; }
.hero { min-height:560px; display:grid; grid-template-columns:1.02fr .98fr; align-items:center; gap:50px; padding-top:55px; padding-bottom:65px; }.hero-copy h1,.calculator-hero h1 { max-width:700px; margin:9px 0 18px; font-size:clamp(42px,5.4vw,72px); letter-spacing:-3.5px; line-height:.98; }.eyebrow { margin:0; color:var(--green); font-family:"DM Mono",monospace; font-size:12px; font-weight:500; letter-spacing:1px; text-transform:uppercase; }.lead { max-width:620px; margin:0; color:#485348; font-size:21px; line-height:1.45; }.actions { display:flex; flex-wrap:wrap; gap:12px; margin-top:30px; }.button { display:inline-flex; justify-content:center; align-items:center; min-height:47px; padding:11px 18px; border:1px solid var(--ink); border-radius:5px; font-weight:600; text-decoration:none; }.button.primary { background:var(--ink); color:var(--white); }.button.primary:hover { background:var(--green); border-color:var(--green); }.button.ghost:hover { background:var(--paper-dark); }.microcopy { margin-top:17px; color:var(--muted); font-size:13px; }.board-figure { margin:0; padding:30px; border:1px solid var(--line); border-radius:var(--radius); background:var(--white); }.board-figure figcaption,.caption-note { margin:12px 0 0; color:var(--muted); font-size:13px; text-align:center; }
section { scroll-margin-top:92px; }.quick-answer { padding:82px 0; }.section-number { margin:0 0 7px; color:var(--amber); font-family:"DM Mono",monospace; font-size:13px; }.quick-answer h2,.article-content h2,.faq h2,.limitations h2 { margin:0 0 20px; font-size:clamp(30px,4vw,44px); letter-spacing:-1.8px; line-height:1.05; }.quick-answer p:not(.section-number) { max-width:700px; }
.band { padding:78px 0; background:var(--dark); color:var(--white); }.band .section-heading p:last-child { color:#c5cec2; }.section-heading { max-width:650px; }.section-heading h2,.risk-layout h2,.calculator-promo h2,.scenario-section h2 { margin:8px 0 10px; font-size:clamp(31px,4vw,48px); letter-spacing:-2px; line-height:1.05; }.steps { display:grid; grid-template-columns:repeat(4,1fr); gap:16px; margin:40px 0 0; padding:0; list-style:none; }.steps li { padding:20px; border-top:1px solid #718176; }.steps span { display:grid; place-items:center; width:28px; height:28px; border-radius:50%; background:#d4e3d2; color:var(--dark); font-family:"DM Mono",monospace; font-size:13px; }.steps h3 { margin:20px 0 5px; font-size:18px; }.steps p { margin:0; color:#c5cec2; font-size:15px; }
.content-grid { display:grid; grid-template-columns:minmax(0,1fr) 320px; gap:80px; padding:88px 0; }.article-content h3 { margin:32px 0 5px; font-size:21px; }.article-content h3 + p { margin-top:0; }.rule-note { align-self:start; position:sticky; top:100px; padding:26px; border:1px solid var(--line); border-radius:var(--radius); background:var(--green-soft); }.rule-note h2 { margin:7px 0 10px; font-size:28px; line-height:1.1; }.rule-note p:not(.eyebrow) { font-size:15px; }.rule-note a { color:var(--green); font-weight:600; }
.examples { padding-bottom:84px; }.example-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:22px; margin-top:32px; }.example-grid figure { margin:0; padding:17px; border:1px solid var(--line); border-radius:var(--radius); background:var(--white); }.example-grid img { width:100%; }.example-grid figcaption { margin-top:14px; font-size:15px; }.example-grid strong { display:block; margin-bottom:3px; }
.risk-section { padding:78px 0; background:#ebe4d8; }.risk-layout { display:grid; grid-template-columns:1fr .8fr; align-items:center; gap:80px; }.risk-layout p { max-width:620px; }.no-pattern { padding:30px; border-left:5px solid var(--amber); background:var(--white); }.no-pattern span { display:grid; place-items:center; width:29px; height:29px; border:1px solid var(--amber); border-radius:50%; color:var(--amber); font-family:"DM Mono",monospace; }.no-pattern h3 { margin:17px 0 7px; font-size:24px; }.no-pattern p { margin:0; font-size:15px; }
.calculator-promo { display:flex; justify-content:space-between; align-items:center; gap:30px; margin-top:82px; margin-bottom:82px; padding:35px; border-radius:var(--radius); background:var(--green); color:var(--white); }.calculator-promo .eyebrow { color:#d5ebd5; }.calculator-promo h2 { margin:6px 0 8px; font-size:34px; }.calculator-promo p:not(.eyebrow) { max-width:680px; margin:0; color:#e8f0e5; }.calculator-promo .button { flex:none; border-color:var(--white); background:var(--white); color:var(--ink); }
.faq { padding-bottom:90px; }.faq details,.formula details { border-bottom:1px solid var(--line); }.faq summary,.formula summary { padding:19px 36px 19px 0; position:relative; cursor:pointer; font-size:18px; font-weight:600; list-style:none; }.faq summary::after,.formula summary::after { content:"+"; position:absolute; right:5px; color:var(--green); font-family:"DM Mono",monospace; font-size:23px; font-weight:400; }.faq details[open] summary::after,.formula details[open] summary::after { content:"-"; }.faq details p { max-width:750px; margin:0 0 21px; color:#475147; }
.site-footer { padding:46px 0 20px; background:var(--dark); color:#e7ebe2; }.footer-grid { display:grid; grid-template-columns:2fr 1fr 1fr; gap:30px; }.site-footer .wordmark { color:var(--white); }.footer-grid p { font-size:14px; color:#bfc8bc; }.footer-grid a:not(.wordmark) { display:block; margin:6px 0; color:#e7ebe2; font-size:14px; }.footer-label { margin:0 0 11px; color:#91a58e !important; font-family:"DM Mono",monospace; font-size:12px !important; text-transform:uppercase; }.footer-bottom { display:flex; gap:22px; flex-wrap:wrap; margin-top:38px; padding-top:16px; border-top:1px solid #536152; color:#bfc8bc; font-size:12px; }
.back-link { color:var(--green); font-size:14px; font-weight:600; }.calculator-hero { padding-top:70px; padding-bottom:48px; }.calculator-hero h1 { font-size:clamp(42px,6vw,67px); }.calculator-layout { display:grid; grid-template-columns:1fr 1fr; gap:25px; align-items:stretch; }.calculator-form,.results-card { padding:30px; border:1px solid var(--line); border-radius:var(--radius); background:var(--white); }.calculator-form h2 { margin-top:0; font-size:28px; }.preset-row { display:flex; gap:8px; flex-wrap:wrap; margin-bottom:28px; }.preset-row button { padding:7px 11px; border:1px solid var(--line); border-radius:999px; background:var(--paper); color:var(--ink); font:500 13px "DM Mono",monospace; cursor:pointer; }.preset-row button:hover,.preset-row button:focus { border-color:var(--green); background:var(--green-soft); }.calculator-form label { display:flex; justify-content:space-between; margin-top:23px; font-weight:600; }.calculator-form output { color:var(--green); font-family:"DM Mono",monospace; }.calculator-form input[type=range] { width:calc(100% - 72px); margin:14px 0 0; accent-color:var(--green); }.number-input { float:right; width:60px; height:31px; margin-top:7px; border:1px solid var(--line); border-radius:4px; background:var(--paper); color:var(--ink); font:14px "DM Mono",monospace; text-align:center; }.field-help { clear:both; margin:4px 0 0; color:var(--muted); font-size:13px; }.results-card { background:var(--dark); color:var(--white); }.results-card .eyebrow { color:#b8d3b5; }.results-card h2 { margin:10px 0 3px; max-width:420px; font-size:30px; line-height:1.1; }.big-result { margin:16px 0 0; color:#cbe8c7; font-family:"DM Mono",monospace; font-size:clamp(48px,6vw,70px); line-height:1; letter-spacing:-3px; }.result-reading { margin:11px 0 0; color:#c9d1c6; }.result-divider { height:1px; margin:28px 0; background:#526152; }.results-card h3 { margin:0; color:#dfe8dc; font-size:16px; }.series-result { margin:7px 0 23px; color:#f1cc91; font-family:"DM Mono",monospace; font-size:31px; }.results-card dl { display:grid; grid-template-columns:1fr 1fr; gap:15px; margin:0; }.results-card dl div { padding-top:12px; border-top:1px solid #526152; }.results-card dt { color:#b9c2b7; font-size:12px; }.results-card dd { margin:2px 0 0; font-family:"DM Mono",monospace; font-size:21px; }.formula { padding-top:32px; }.formula details { border-top:1px solid var(--line); }.formula details div { padding-bottom:14px; color:#4d574d; }.formula code { padding:2px 4px; border-radius:3px; background:var(--paper-dark); font-family:"DM Mono",monospace; font-size:.9em; }.limitations { margin-top:65px; padding:32px; border-left:5px solid var(--amber); background:#eee4d0; }.limitations h2 { margin-top:8px; font-size:31px; }.limitations p:last-child { margin-bottom:0; }.scenario-section { padding-top:65px; }.table-wrap { margin-top:27px; overflow-x:auto; border:1px solid var(--line); border-radius:var(--radius); background:var(--white); }table { width:100%; border-collapse:collapse; text-align:left; }th,td { padding:16px 20px; border-bottom:1px solid var(--line); }th { background:var(--green-soft); font-size:14px; }tr:last-child td { border-bottom:0; }td:not(:first-child) { font-family:"DM Mono",monospace; }.return-link { padding:68px 0; text-align:center; }
button,input,summary,a { -webkit-tap-highlight-color:transparent; }button:focus-visible,input:focus-visible,summary:focus-visible,a:focus-visible { outline:3px solid #e6a94f; outline-offset:3px; }
@media (max-width:760px) { body { font-size:16px; }.wrap,.narrow { width:min(100% - 28px,1120px); }.nav { min-height:65px; }.menu-toggle { display:block; border:0; background:none; color:var(--ink); font:500 13px "DM Mono",monospace; }.nav-links { display:none; position:absolute; left:14px; right:14px; top:61px; flex-direction:column; align-items:stretch; gap:0; padding:10px; border:1px solid var(--line); border-radius:10px; background:var(--white); }.nav-links.open { display:flex; }.nav-links a { padding:10px; }.nav-tool { text-align:center; }.hero { grid-template-columns:1fr; gap:32px; min-height:auto; padding:50px 0; }.hero-copy h1,.calculator-hero h1 { letter-spacing:-2.6px; }.lead { font-size:19px; }.board-figure { padding:20px; }.quick-answer,.content-grid { padding:58px 0; }.steps,.content-grid,.risk-layout,.calculator-layout { grid-template-columns:1fr; }.steps { gap:18px; }.steps li { padding:16px 0; }.content-grid { gap:34px; }.rule-note { position:static; }.example-grid { grid-template-columns:1fr; }.risk-section { padding:58px 0; }.risk-layout { gap:30px; }.calculator-promo { display:block; margin-top:55px; margin-bottom:55px; padding:27px; }.calculator-promo .button { margin-top:22px; }.footer-grid { grid-template-columns:1fr 1fr; }.footer-grid > :first-child { grid-column:1 / -1; }.calculator-hero { padding-top:52px; padding-bottom:34px; }.calculator-form,.results-card { padding:22px; }.results-card h2 { font-size:26px; }.big-result { font-size:53px; }.results-card dl { gap:10px; }.scenario-section { padding-top:52px; } }
@media (prefers-reduced-motion:reduce) { html { scroll-behavior:auto; } }

.board-figure img { width:100%; height:auto; }
.example-grid figure { display:flex; flex-direction:column; }
.example-grid img { aspect-ratio:1 / 1; object-fit:contain; }
.scenario-section { padding-bottom:74px; }
.scenario-section + .faq { padding-top:0; }

body { background-color:var(--paper); background-image:linear-gradient(rgba(61,118,85,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(61,118,85,.035) 1px,transparent 1px); background-size:28px 28px; }
.site-header { border-top:4px solid var(--amber); }
.mark { width:31px; height:31px; border-radius:8px; background:var(--dark); border:2px solid var(--green); color:var(--green-soft); }
.wordmark em { color:var(--green); }
.hero { position:relative; }
.hero::before { content:""; position:absolute; right:1%; bottom:7%; width:180px; height:180px; border:1px solid rgba(184,119,36,.28); border-radius:20px; background:linear-gradient(90deg,transparent 49%,rgba(184,119,36,.25) 50%,transparent 51%),linear-gradient(transparent 49%,rgba(184,119,36,.25) 50%,transparent 51%); background-size:36px 36px; transform:rotate(8deg); pointer-events:none; }
.hero-copy,.board-figure { position:relative; z-index:1; }
.board-figure { border:2px solid var(--line); background:linear-gradient(145deg,var(--white),#f6f0e5); }
.board-figure::before { content:"MINES / INDIA"; display:block; margin:0 0 12px; color:var(--amber); font:500 11px "DM Mono",monospace; letter-spacing:1.2px; }
.button.primary { background:var(--dark); border-bottom:3px solid var(--amber); }
.button.primary:hover { background:var(--green); border-color:var(--amber); }
.steps li { border-top-color:#c9832c; }
.history-section { padding:88px 0; background:var(--dark); color:var(--white); }
.history-grid { display:grid; grid-template-columns:minmax(0,1.2fr) minmax(280px,.8fr); gap:74px; align-items:center; }
.history-copy h2,.india-section h2 { margin:8px 0 16px; font-size:clamp(32px,4vw,48px); letter-spacing:-2px; line-height:1.05; }
.history-copy p:not(.eyebrow) { max-width:700px; color:#d5ddd2; }
.history-copy a { color:#f4c982; font-weight:600; }
.history-panel { padding:28px; border:1px solid #60705e; border-radius:var(--radius); background:linear-gradient(145deg,#2c382e,#202620); }
.history-panel .eyebrow { color:#f0c176; }.history-panel ol { margin:20px 0 0; padding:0; list-style:none; }.history-panel li { display:flex; align-items:center; gap:16px; padding:14px 0; border-top:1px solid #526152; }.history-panel span { color:#f0c176; font:500 13px "DM Mono",monospace; }.history-panel p { margin:0; color:#e7ebe2; font-size:15px; }
.india-section { padding:88px 0; }.india-section > .section-heading { max-width:770px; }.india-points { display:grid; grid-template-columns:repeat(3,1fr); gap:20px; margin-top:35px; }.india-points article { padding:25px; border:1px solid var(--line); border-top:4px solid var(--green); border-radius:var(--radius); background:var(--white); }.india-points article:nth-child(2) { border-top-color:var(--amber); }.india-points h3 { margin:18px 0 7px; font-size:21px; }.india-points p { margin:0; color:var(--muted); font-size:15px; }.india-points a { color:var(--green); font-weight:600; }.india-icon { display:grid; place-items:center; width:36px; height:36px; border-radius:8px; background:var(--green-soft); color:var(--green); font:500 12px "DM Mono",monospace; }.india-note { max-width:770px; margin:22px 0 0; color:var(--muted); font-size:13px; }
@media (max-width:760px) { .hero::before { width:110px; height:110px; right:0; bottom:3%; background-size:22px 22px; }.history-section,.india-section { padding:58px 0; }.history-grid,.india-points { grid-template-columns:1fr; }.history-grid { gap:28px; } }

.button.primary { background:var(--green); color:var(--white); border-color:var(--green); border-bottom-color:var(--amber); }
.button.primary:hover { background:#2f6044; border-color:#2f6044; border-bottom-color:var(--amber); }
.calculator-promo .button.primary { background:#f0c176; color:var(--dark); border-color:#f0c176; border-bottom-color:#c9832c; }
.calculator-promo .button.primary:hover { background:#f7d396; border-color:#f7d396; border-bottom-color:#c9832c; }

main a:not(.button):not(.wordmark) { color:var(--green); font-weight:600; text-decoration:none; background-image:linear-gradient(currentColor,currentColor); background-repeat:no-repeat; background-position:0 100%; background-size:100% 1px; }
main a:not(.button):not(.wordmark):hover { color:#2f6044; background-size:100% 2px; }
main .history-copy a { color:#f4c982; background-image:linear-gradient(#f4c982,#f4c982); }
main .history-copy a:hover { color:#ffe0a9; background-size:100% 2px; }