/* =====================================================================
 * GeoSutra design system — shared across all non-app pages.
 * One stylesheet, no build step. Tokens mirror the original Observatory
 * (Spectral + IBM Plex, Himalayan green palette) so the new marketing
 * site and the .dc.html apps feel like one product.
 * ===================================================================== */

:root{
  --green:#1F9D57;          /* primary */
  --green-deep:#0F6E3C;     /* deep / hover */
  --green-ink:#16241C;      /* near-black text */
  --green-200:#9FE3BC;
  --green-100:#C5E6D3;
  --green-50:#E7F4EC;
  --tint:#F6FAF7;           /* faint surface */
  --tint-2:#EAF5EE;
  --paper:#FFFFFF;
  --ink:#16241C;
  --muted:#46584E;
  --muted-2:#7C8C82;
  --line:rgba(20,50,30,0.10);
  --line-strong:rgba(20,50,30,0.18);
  --amber:#C7841F;
  --rust:#9A3417;
  --radius:10px;
  --radius-sm:6px;
  --shadow-sm:0 2px 10px -6px rgba(16,40,24,.32);
  --shadow:0 18px 44px -28px rgba(16,40,24,.55);
  --maxw:1200px;
  --serif:'Spectral',Georgia,serif;
  --sans:'IBM Plex Sans',system-ui,sans-serif;
  --mono:'IBM Plex Mono',ui-monospace,monospace;
  --deva:'IBM Plex Sans Devanagari','IBM Plex Sans',sans-serif;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:var(--sans);font-size:16px;line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
body[data-lang="ne"]{font-family:var(--deva);}
::selection{background:var(--green);color:#fff;}
a{color:inherit;text-decoration:none;}
img{max-width:100%;display:block;}
h1,h2,h3,h4{font-family:var(--serif);font-weight:500;line-height:1.1;letter-spacing:-0.015em;margin:0 0 .5em;color:var(--green-ink);}
h1{font-size:clamp(34px,4.6vw,60px);}
h2{font-size:clamp(26px,3.4vw,44px);}
h3{font-size:clamp(19px,1.6vw,24px);}
p{margin:0 0 1em;}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;}

/* ---- layout ---- */
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 clamp(20px,4vw,48px);}
.section{padding:clamp(56px,8vw,104px) 0;}
.section--tint{background:var(--tint);}
.section--ink{background:var(--green-deep);color:var(--green-50);}
.section--ink h1,.section--ink h2,.section--ink h3{color:#fff;}
.eyebrow{font-family:var(--mono);font-size:12px;letter-spacing:.18em;text-transform:uppercase;color:var(--green);margin-bottom:18px;display:block;}
.section--ink .eyebrow{color:var(--green-200);}
.lead{font-size:clamp(17px,1.5vw,20px);line-height:1.6;color:var(--muted);max-width:62ch;}
.section--ink .lead{color:var(--green-100);}
.center{text-align:center;}
.center .lead{margin-left:auto;margin-right:auto;}
.grid{display:grid;gap:22px;}
.grid-2{grid-template-columns:repeat(2,1fr);}
.grid-3{grid-template-columns:repeat(3,1fr);}
.grid-4{grid-template-columns:repeat(4,1fr);}
@media(max-width:900px){.grid-3,.grid-4{grid-template-columns:repeat(2,1fr);}}
@media(max-width:620px){.grid-2,.grid-3,.grid-4{grid-template-columns:1fr;}}

/* ---- buttons ---- */
.btn{display:inline-flex;align-items:center;gap:8px;font-weight:600;font-size:15px;
  padding:13px 22px;border-radius:var(--radius-sm);border:1px solid transparent;cursor:pointer;
  transition:transform .12s ease,background .15s ease,box-shadow .15s ease;line-height:1;font-family:inherit;}
.btn:hover{transform:translateY(-1px);}
.btn-primary{background:var(--green);color:#fff;}
.btn-primary:hover{background:var(--green-deep);box-shadow:var(--shadow-sm);}
.btn-ghost{background:transparent;border-color:var(--line-strong);color:var(--green-ink);}
.btn-ghost:hover{border-color:var(--green);color:var(--green-deep);}
.section--ink .btn-ghost{border-color:rgba(255,255,255,.4);color:#fff;}
.btn-light{background:#fff;color:var(--green-deep);}
.btn-sm{padding:9px 15px;font-size:13.5px;}

/* ---- cards ---- */
.card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:24px;transition:border-color .15s,box-shadow .15s,transform .15s;}
.card--hover:hover{border-color:var(--green-200);box-shadow:var(--shadow);transform:translateY(-2px);}
.card h3{margin-bottom:.35em;}
.card .muted{color:var(--muted);font-size:14.5px;margin:0;}
.badge{display:inline-block;font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;
  color:var(--green-deep);background:var(--green-50);border-radius:100px;padding:5px 11px;}
.num-badge{width:34px;height:34px;border-radius:9px;background:var(--green-50);color:var(--green-deep);
  display:grid;place-items:center;font-family:var(--mono);font-weight:600;font-size:15px;flex:none;}
.tag-list{list-style:none;padding:0;margin:12px 0 0;display:flex;flex-direction:column;gap:7px;}
.tag-list li{font-size:14px;color:var(--muted);padding-left:18px;position:relative;}
.tag-list li::before{content:"";position:absolute;left:0;top:8px;width:7px;height:7px;border-radius:2px;background:var(--green);}

/* ---- stats ---- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;}
.stats .stat{background:var(--paper);padding:24px;}
.stat .n{font-family:var(--serif);font-size:clamp(26px,3vw,38px);color:var(--green-deep);line-height:1;}
.stat .l{font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted-2);margin-top:8px;}
@media(max-width:760px){.stats{grid-template-columns:repeat(2,1fr);}}

/* ---- header / nav ---- */
.site-header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.88);backdrop-filter:blur(14px);border-bottom:1px solid var(--line);}
.nav{display:flex;align-items:center;justify-content:space-between;gap:18px;height:66px;}
.brand{display:flex;align-items:baseline;gap:9px;flex:none;}
.brand .b-name{font-family:var(--serif);font-weight:600;font-size:21px;letter-spacing:.02em;color:var(--green-ink);}
/* Brand shows ONE name for the active language: GeoSutra (en) / जियोसूत्र (ne). */
.brand .b-deva{display:none;font-family:var(--deva);font-size:21px;font-weight:600;letter-spacing:.02em;color:var(--green-ink);}
body[data-lang="ne"] .brand .b-name{display:none;}
body[data-lang="ne"] .brand .b-deva{display:inline-block;}
.nav-links{display:flex;align-items:center;gap:4px;flex-wrap:wrap;justify-content:flex-end;}
.nav-links a{font-size:13.5px;color:var(--muted);padding:8px 10px;border-radius:6px;white-space:nowrap;transition:color .12s,background .12s;}
.nav-links a:hover{color:var(--green-deep);background:var(--green-50);}
.nav-links a.active{color:var(--green-deep);font-weight:600;}
.nav-cta{display:flex;align-items:center;gap:10px;flex:none;}
.lang-toggle{display:flex;border:1px solid var(--line-strong);border-radius:100px;overflow:hidden;}
.lang-toggle button{border:0;background:transparent;font-family:inherit;font-size:12px;padding:6px 11px;cursor:pointer;color:var(--muted);}
.lang-toggle button.on{background:var(--green);color:#fff;}
.has-drop{position:relative;}
.has-drop>.drop-toggle{cursor:pointer;}
.drop{position:absolute;top:calc(100% + 6px);left:0;min-width:210px;background:#fff;border:1px solid var(--line);border-radius:10px;box-shadow:var(--shadow);padding:8px;display:none;}
.has-drop:hover .drop,.has-drop:focus-within .drop{display:block;}
.drop a{display:block;font-size:13.5px;padding:9px 11px;border-radius:7px;color:var(--ink);}
.drop a:hover{background:var(--green-50);color:var(--green-deep);}
.drop small{display:block;color:var(--muted-2);font-size:11.5px;}
.hamburger{display:none;background:none;border:0;cursor:pointer;padding:8px;}
.hamburger span{display:block;width:22px;height:2px;background:var(--green-ink);margin:4px 0;border-radius:2px;}
@media(max-width:1040px){
  .nav-links,.nav .lang-toggle{display:none;}
  .hamburger{display:block;}
}
/* mobile drawer */
.m-drawer{position:fixed;inset:0;z-index:80;background:rgba(16,36,24,.4);opacity:0;pointer-events:none;transition:opacity .2s;}
.m-drawer.open{opacity:1;pointer-events:auto;}
.m-panel{position:absolute;top:0;right:0;height:100%;width:min(86vw,360px);background:#fff;padding:22px;overflow-y:auto;transform:translateX(100%);transition:transform .24s ease;}
.m-drawer.open .m-panel{transform:none;}
.m-panel a{display:block;padding:12px 6px;border-bottom:1px solid var(--line);font-size:15px;color:var(--ink);}
.m-panel a.active{color:var(--green-deep);font-weight:600;}
.m-close{float:right;background:none;border:0;font-size:26px;line-height:1;cursor:pointer;color:var(--muted);}

/* ---- hero ---- */
.hero{padding:clamp(56px,8vw,96px) 0;}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:54px;align-items:center;}
@media(max-width:900px){.hero-grid{grid-template-columns:1fr;gap:36px;}}
.hero h1{margin-bottom:.4em;}
.hero .cta-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px;}

/* ---- footer ---- */
.site-footer{background:var(--green-ink);color:#C9D6CE;padding:64px 0 28px;}
.site-footer h4{color:#fff;font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;font-weight:600;margin-bottom:16px;}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:32px;}
@media(max-width:860px){.foot-grid{grid-template-columns:1fr 1fr;gap:28px;}}
@media(max-width:520px){.foot-grid{grid-template-columns:1fr;}}
.site-footer a{color:#A9BBB0;font-size:14px;display:block;padding:5px 0;}
.site-footer a:hover{color:#fff;}
.foot-brand .b-name{font-family:var(--serif);font-size:22px;color:#fff;}
.foot-brand .b-deva{display:none;font-family:var(--deva);font-size:22px;color:#fff;}
body[data-lang="ne"] .foot-brand .b-name{display:none;}
body[data-lang="ne"] .foot-brand .b-deva{display:inline-block;}
.foot-brand p{color:#90A398;font-size:14px;margin-top:12px;max-width:34ch;}
.foot-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:44px;padding-top:22px;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;color:#7E938A;font-size:13px;}
.foot-legal{display:flex;gap:18px;}
.foot-legal a{display:inline;padding:0;}

/* ---- forms ---- */
.field{margin-bottom:14px;}
.field label{display:block;font-family:var(--mono);font-size:10.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted-2);margin-bottom:6px;}
.field input,.field select,.field textarea{width:100%;border:1px solid var(--line-strong);border-radius:var(--radius-sm);padding:11px 13px;font-size:15px;font-family:inherit;color:var(--ink);background:#fff;outline:none;transition:border-color .12s,box-shadow .12s;}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--green);box-shadow:0 0 0 3px var(--green-50);}
.field textarea{resize:vertical;min-height:110px;}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px;}
@media(max-width:560px){.form-row{grid-template-columns:1fr;}}
.note{font-size:13px;padding:11px 14px;border-radius:var(--radius-sm);}
.note-ok{background:var(--green-50);border:1px solid rgba(31,157,87,.4);color:var(--green-deep);}
.note-err{background:#FBEAE6;border:1px solid rgba(192,73,43,.4);color:var(--rust);}
.hp{position:absolute;left:-9999px;width:1px;height:1px;opacity:0;}

/* ---- misc ---- */
.partner-strip{display:flex;flex-wrap:wrap;gap:14px 36px;align-items:center;justify-content:center;}
.partner-strip span{font-family:var(--serif);font-size:18px;color:var(--muted-2);opacity:.8;}
.pill-row{display:flex;flex-wrap:wrap;gap:8px;}
.pill{font-family:var(--mono);font-size:12px;color:var(--green-deep);background:var(--green-50);border-radius:100px;padding:6px 13px;}
.kicker{font-family:var(--mono);font-size:12px;letter-spacing:.1em;color:var(--muted-2);}
.divider{height:1px;background:var(--line);border:0;margin:0;}
.reveal{opacity:0;transform:translateY(20px);transition:opacity .6s ease,transform .6s ease;}
.reveal.in{opacity:1;transform:none;}

/* =====================================================================
 * Venture-grade layer — premium primitives layered on top of the base
 * system. Everything here is progressive: pages that don't use it are
 * unaffected, and all motion is disabled under prefers-reduced-motion.
 * ===================================================================== */

/* ---- scroll progress bar ---- */
.scroll-progress{position:fixed;top:0;left:0;height:2px;width:0;z-index:200;
  background:linear-gradient(90deg,var(--green),var(--green-200));transition:width .08s linear;}

/* ---- gradient / mesh hero surface ---- */
.hero--mesh{position:relative;overflow:hidden;}
.hero--mesh::before{content:"";position:absolute;inset:0;z-index:-1;
  background:
    radial-gradient(60% 60% at 8% 0%, rgba(31,157,87,.10), transparent 60%),
    radial-gradient(50% 50% at 100% 8%, rgba(159,227,188,.22), transparent 55%),
    radial-gradient(40% 60% at 80% 100%, rgba(15,110,60,.07), transparent 60%);}
.hero--mesh::after{content:"";position:absolute;inset:0;z-index:-1;opacity:.5;
  background-image:linear-gradient(rgba(31,157,87,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(31,157,87,.05) 1px,transparent 1px);
  background-size:44px 44px;mask-image:radial-gradient(70% 60% at 50% 30%,#000,transparent 80%);}

/* ---- gradient text accent ---- */
.accent{background:linear-gradient(100deg,var(--green-deep),var(--green) 55%,#34BE76);
  -webkit-background-clip:text;background-clip:text;color:transparent;}

/* ---- availability / status dot ---- */
.live-dot{display:inline-grid;grid-template-columns:auto auto;align-items:center;gap:8px;
  font-family:var(--mono);font-size:12px;letter-spacing:.04em;color:var(--green-deep);
  background:var(--green-50);border:1px solid var(--green-100);border-radius:100px;padding:6px 13px;}
.live-dot::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--green);
  box-shadow:0 0 0 0 rgba(31,157,87,.5);animation:pulse 2.2s infinite;}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(31,157,87,.45);}70%{box-shadow:0 0 0 7px rgba(31,157,87,0);}100%{box-shadow:0 0 0 0 rgba(31,157,87,0);}}

/* ---- impact metric tiles (bigger emphasis than .stats) ---- */
.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
@media(max-width:860px){.metrics{grid-template-columns:repeat(2,1fr);}}
@media(max-width:480px){.metrics{grid-template-columns:1fr;}}
.metric{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 24px;position:relative;overflow:hidden;transition:border-color .15s,box-shadow .15s,transform .15s;}
.metric:hover{border-color:var(--green-200);box-shadow:var(--shadow);transform:translateY(-2px);}
.metric .big{font-family:var(--serif);font-size:clamp(34px,4.4vw,52px);line-height:1;
  color:var(--green-deep);letter-spacing:-.02em;}
.metric .big .unit{font-size:.5em;color:var(--green);margin-left:2px;}
.metric .lbl{font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted-2);margin-top:10px;}
.metric .sub{font-size:13.5px;color:var(--muted);margin-top:8px;}
.section--ink .metric{background:rgba(255,255,255,.04);border-color:rgba(255,255,255,.12);}
.section--ink .metric .big{color:#fff;}
.section--ink .metric .big .unit{color:var(--green-200);}
.section--ink .metric .lbl{color:var(--green-200);}
.section--ink .metric .sub{color:var(--green-100);}

/* ---- trust strip / credibility wall ---- */
.trust{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:14px 30px;}
.trust span{font-family:var(--serif);font-size:clamp(15px,1.5vw,19px);color:var(--muted-2);
  letter-spacing:.01em;white-space:nowrap;transition:color .2s,opacity .2s;opacity:.85;}
.trust span:hover{color:var(--green-deep);opacity:1;}
.trust .sep{width:5px;height:5px;border-radius:50%;background:var(--line-strong);}

/* ---- soft list / checklist ---- */
.check{list-style:none;padding:0;margin:14px 0 0;display:grid;gap:10px;}
.check li{position:relative;padding-left:30px;font-size:15px;color:var(--muted);line-height:1.5;}
.check li::before{content:"";position:absolute;left:0;top:1px;width:20px;height:20px;border-radius:6px;
  background:var(--green-50);background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%230F6E3C' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:center;}
.section--ink .check li{color:var(--green-100);}
.section--ink .check li::before{background-color:rgba(255,255,255,.1);}

/* ---- feature row (icon + text) ---- */
.frow{display:flex;gap:16px;align-items:flex-start;}
.frow .ic{width:42px;height:42px;border-radius:10px;flex:none;display:grid;place-items:center;
  background:var(--green-50);color:var(--green-deep);font-family:var(--mono);font-weight:600;font-size:17px;}

/* ---- timeline / roadmap ---- */
.timeline{position:relative;margin-top:30px;padding-left:26px;}
.timeline::before{content:"";position:absolute;left:6px;top:6px;bottom:6px;width:2px;background:var(--line-strong);}
.tl-item{position:relative;padding-bottom:26px;}
.tl-item::before{content:"";position:absolute;left:-26px;top:4px;width:14px;height:14px;border-radius:50%;
  background:var(--paper);border:2px solid var(--green);}
.tl-item.done::before{background:var(--green);}
.tl-item .when{font-family:var(--mono);font-size:11.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--green-deep);}
.tl-item h4{font-family:var(--serif);font-size:18px;font-weight:500;margin:4px 0 4px;color:var(--green-ink);}
.tl-item p{margin:0;font-size:14.5px;color:var(--muted);}

/* ---- callout / placeholder marker ---- */
.placeholder{outline:1px dashed rgba(199,132,31,.6);outline-offset:2px;
  background:rgba(199,132,31,.06);border-radius:4px;padding:0 4px;}
.ph-note{font-family:var(--mono);font-size:11px;letter-spacing:.06em;text-transform:uppercase;
  color:var(--amber);background:rgba(199,132,31,.08);border:1px solid rgba(199,132,31,.3);
  border-radius:100px;padding:4px 10px;display:inline-block;}

/* ---- card with top accent + hover lift used on feature grids ---- */
.card--accent{border-top:2px solid var(--green);}
.card .num-badge{margin-bottom:14px;}
.card--hover{position:relative;}

/* ---- staggered reveal helpers ---- */
.reveal[data-delay="1"]{transition-delay:.08s;}
.reveal[data-delay="2"]{transition-delay:.16s;}
.reveal[data-delay="3"]{transition-delay:.24s;}
.reveal[data-delay="4"]{transition-delay:.32s;}
.reveal[data-delay="5"]{transition-delay:.40s;}

/* ---- counter number ---- */
.count{font-variant-numeric:tabular-nums;}

/* ---- big quote / vision ---- */
.bigquote{font-family:var(--serif);font-size:clamp(24px,3.2vw,38px);line-height:1.25;
  letter-spacing:-.015em;color:var(--green-ink);max-width:24ch;}
.section--ink .bigquote{color:#fff;}

/* ---- reduced motion: kill all the new animation ---- */
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;
    transition-duration:.001ms!important;scroll-behavior:auto!important;}
  .reveal{opacity:1!important;transform:none!important;}
}