:root{--bg:#f8f7f2;--ink:#243d34;--sub:#748074;--line:#dfe4d8;--green:#2e5c49;--orange:#b85131}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:14px/1.65 'DM Sans',Arial,sans-serif}a{color:inherit}button,input{font:inherit}button{cursor:pointer}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid #b85131;outline-offset:4px}h1,h2,h3{font-family:'Manrope',Arial,sans-serif;line-height:1.17;margin:0;letter-spacing:-1px}p{margin:0}a{text-decoration:none}.wrap{max-width:1320px;margin:auto;padding:0 48px}.site-header{height:94px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:25px}.brand{display:flex;align-items:center;gap:10px;font-family:'Manrope',Arial,sans-serif;font-size:25px;font-weight:800;letter-spacing:-1.2px}.brand svg{width:33px;height:33px}.brand em{font-style:normal;color:var(--orange)}.header-links{display:flex;gap:27px;font-size:11px;align-items:center;color:#61735f}.header-links .nav-cta{border:1px solid #c8d4c1;padding:9px 15px;border-radius:5px;color:#32573b}.hero{display:grid;grid-template-columns:1.15fr 1fr;gap:70px;padding:61px 0 45px;align-items:center}.eyebrow{color:var(--orange);font-size:9px;letter-spacing:1.8px;font-weight:700;display:block;margin-bottom:18px}.hero h1{font-size:clamp(42px,4.7vw,66px);font-weight:650;letter-spacing:-3px}.hero h1 em{font-family:Georgia,serif;font-weight:400;color:#718b5a}.hero-copy>p{font-size:14px;color:#75816f;max-width:460px;margin:23px 0 25px;line-height:1.9}.actions{display:flex;align-items:center;gap:23px}.primary{display:inline-block;padding:12px 20px;background:var(--green);color:#fff;border:1px solid var(--green);border-radius:5px;font-size:11px;font-weight:600}.secondary{color:var(--orange);font-size:11px;font-weight:600}.hero-note{font-size:9px;color:#86917f;margin-top:20px;display:flex;gap:9px;align-items:center}.hero-note i,.live-dot{width:5px;height:5px;background:#78a271;border-radius:50%;display:inline-block}.hero-lab{position:relative;background:#21342f;border-radius:12px;padding:21px 24px;color:#e0e7d6;overflow:hidden}.lab-top{display:flex;align-items:center;justify-content:space-between;font-size:8px;letter-spacing:1.6px;color:#b1c2ab}.lab-top span:first-child{display:flex;align-items:center;gap:7px}.hero-lab svg{display:block;width:100%;margin:12px 0 3px}.lab-caption{display:flex;justify-content:space-between;align-items:center;padding-top:17px;border-top:1px solid #ffffff16}.lab-caption small{font-size:8px;letter-spacing:1.2px;color:#a1b397}.lab-caption h3{font-size:18px;letter-spacing:-.4px;margin-top:6px}.lab-caption a{width:35px;height:35px;border:1px solid #ffffff29;border-radius:50%;display:grid;place-items:center;color:#d4dfc9}.stats{display:grid;grid-template-columns:1fr 1fr 1fr;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:23px 0;margin-bottom:55px}.stats>div{display:flex;gap:13px;align-items:baseline;padding:0 26px;border-right:1px solid var(--line)}.stats>div:first-child{padding-left:0}.stats>div:last-child{border-right:0}.stats strong{font-size:28px;font-family:'Manrope',Arial,sans-serif;letter-spacing:-1px;font-weight:550}.stats span{font-size:10px;color:#7a8871}.catalog-heading{display:flex;justify-content:space-between;align-items:end;gap:25px;margin-bottom:25px}.catalog-heading h2{font-size:31px;font-weight:600;letter-spacing:-1.2px}.catalog-heading .eyebrow{margin-bottom:10px}.search{display:flex;gap:10px;align-items:center;border:1px solid #d5ddcc;background:#fffef9;border-radius:5px;padding:10px 13px;min-width:290px}.search span{font-size:19px;line-height:1;color:#8b9980}.search input{border:0;background:transparent;outline:0;color:var(--ink);width:100%;font-size:11px;min-width:0}.filters{display:flex;gap:7px;flex-wrap:wrap;padding-bottom:22px;border-bottom:1px solid var(--line)}.filter{border:1px solid transparent;padding:7px 13px;border-radius:4px;background:transparent;color:#78866d;font-size:10px}.filter.active{background:#e3e9d9;color:#31583b;border-color:#d9e1cd}.catalog-status{display:flex;justify-content:space-between;font-size:9px;color:#86927c;margin:17px 0 21px}.catalog-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.subject-card{border:1px solid #dfe4d6;border-radius:8px;background:#fffef8;padding:23px;display:flex;flex-direction:column;min-height:260px;transition:transform .15s,border-color .15s}.subject-card:hover{border-color:#a8bc95;transform:translateY(-2px)}.card-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:21px}.subject-icon{width:39px;height:39px;display:grid;place-items:center;background:var(--tint,#e9edde);color:var(--accent,#6e8657);border-radius:9px}.subject-icon svg{width:26px;height:26px;stroke:currentColor;fill:none;stroke-width:1.4}.type-pill{font-size:8px;color:#7c8b70;padding:3px 7px;border:1px solid #e1e7d6;border-radius:3px}.subject-card h3{font-size:18px;font-weight:650;letter-spacing:-.5px;margin-bottom:11px;line-height:1.35}.subject-card p{font-size:11px;color:#7d8b73;line-height:1.8;flex:1}.card-footer{border-top:1px solid #e9ecdf;padding-top:14px;margin-top:19px;display:flex;justify-content:space-between;align-items:center;font-size:9px;color:#849378}.card-footer .available{color:#4c7547;display:flex;align-items:center;gap:6px}.card-footer b{font-size:18px;font-weight:400;color:#6f8659}.catalog-empty{padding:50px;text-align:center;border:1px dashed #cbd6bd;color:#718464;border-radius:6px}.catalog-empty h3{margin-bottom:12px}.catalog-empty button{margin-top:18px}.scope-note{padding:21px 25px;border:1px solid #dde4d0;background:#ebefdf;border-radius:6px;color:#728567;font-size:11px;margin:27px 0 54px}.scope-note strong{color:#385d38;font-size:12px;display:block;margin-bottom:5px}.learn-path{border-top:1px solid var(--line);padding-top:40px;margin-top:45px}.learn-path h2{font-size:30px;font-weight:600}.path-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin:30px 0 55px}.path-step{border-top:1px solid #cdd9c2;padding-top:15px}.path-step>span{font-size:9px;color:var(--orange)}.path-step h3{font-size:16px;margin:10px 0;letter-spacing:-.3px}.path-step p{font-size:11px;color:#7b8b70}.site-footer{display:flex;justify-content:space-between;gap:20px;border-top:1px solid var(--line);padding:25px 0 30px;color:#849278;font-size:10px}.site-footer nav{display:flex;gap:17px}.breadcrumb{font-size:10px;color:#839278;padding:25px 0}.subject-hero{padding:25px 0 40px;max-width:800px}.subject-hero h1{font-size:45px;font-weight:600;letter-spacing:-1.8px;margin-bottom:20px}.subject-hero>p{font-size:15px;color:#74866a;line-height:1.9}.subject-badges{display:flex;gap:9px;margin-top:20px}.subsection-title{font-size:25px;font-weight:600;margin:30px 0 23px}.topic-grid{display:grid;grid-template-columns:1fr 1fr;gap:15px}.topic-card{border:1px solid var(--line);border-radius:7px;background:#fffef7;padding:24px}.topic-card .eyebrow{font-size:8px;color:#86967a;margin-bottom:11px}.topic-card h3{font-size:18px;line-height:1.4;letter-spacing:-.4px}.topic-card p{font-size:12px;color:#7b8c70;margin-top:12px}.live-lesson{display:grid;grid-template-columns:1fr auto;gap:25px;align-items:center;background:#e8eddb;border:1px solid #d5dfc5;border-radius:8px;padding:30px;margin:25px 0}.live-lesson h3{font-size:23px;margin:10px 0}.live-lesson p{font-size:12px;color:#6f845e}.subject-bottom{margin:38px 0}.section-intro{font-size:13px;color:#7b8b70;max-width:720px;margin:10px 0 23px}.back-link{font-size:12px;color:var(--orange)}[hidden]{display:none!important}@media(max-width:1000px){.wrap{padding:0 30px}.hero{gap:35px}.hero h1{font-size:49px}.catalog-grid{grid-template-columns:repeat(2,1fr)}.header-links{gap:17px}.stats>div{padding:0 15px}}@media(max-width:700px){.wrap{padding:0 20px}.site-header{height:77px}.brand{font-size:21px}.header-links>a:not(.nav-contact){display:none}.header-links .nav-contact{font-size:9.5px;padding:6px 9px}.hero{grid-template-columns:1fr;padding:37px 0 28px;gap:30px}.hero h1{font-size:48px;letter-spacing:-2.4px}.hero-copy>p{font-size:13px}.hero-lab{padding:20px}.stats{margin-bottom:37px;padding:18px 0}.stats>div{flex-direction:column;gap:2px;padding:0 12px}.stats strong{font-size:24px}.stats span{font-size:8px;line-height:1.5}.catalog-heading{flex-direction:column;align-items:stretch;gap:20px}.catalog-heading h2{font-size:28px}.search{min-width:0}.catalog-status>span:last-child{display:none}.catalog-grid{grid-template-columns:1fr 1fr;gap:11px}.subject-card{padding:17px;min-height:258px}.subject-card h3{font-size:16px}.subject-card p{font-size:10px}.type-pill{font-size:7px;padding:2px 4px}.subject-icon{width:32px;height:32px}.subject-icon svg{width:23px;height:23px}.card-top{margin-bottom:15px;gap:6px;align-items:flex-start}.path-grid{grid-template-columns:1fr 1fr;gap:25px}.site-footer{flex-direction:column;gap:12px}.topic-grid{grid-template-columns:1fr}.subject-hero h1{font-size:36px}.live-lesson{grid-template-columns:1fr;padding:24px}.live-lesson .primary{justify-self:start}.catalog-status{font-size:9px}.card-footer{font-size:8px;gap:5px}}@media(max-width:390px){.catalog-grid{grid-template-columns:1fr}.subject-card{min-height:230px}.hero h1{font-size:43px}}@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
.experiment-search{margin:35px 0 60px;scroll-margin-top:20px}.experiment-search-controls{display:flex;gap:14px;align-items:end;background:#e9edde;border:1px solid #d7dfcc;padding:20px;border-radius:8px}.experiment-search-controls>div:first-child{flex:1}.experiment-search-controls>div:nth-child(2){width:240px}.experiment-search-controls label{display:block;font-size:11px;font-weight:600;margin-bottom:7px}.experiment-search-controls input,.experiment-search-controls select{width:100%;min-height:43px;padding:10px 12px;border:1px solid #cbd6bd;border-radius:5px;background:#fffef8;color:#314f38;font:inherit;font-size:12px}.experiment-search-controls button{min-height:43px;border:1px solid #cbd6bd;background:#fffef8}.experiment-results{display:grid;grid-template-columns:1fr 1fr;gap:14px}.experiment-result{padding:23px;background:#fffef8;border:1px solid #dbe2d1;border-radius:7px}.experiment-result .eyebrow{font-size:8px;margin-bottom:12px}.experiment-result h3{font-size:18px;line-height:1.4;letter-spacing:-.4px}.experiment-result h3 a:hover{text-decoration:underline}.experiment-result p{font-size:12px;color:#74866a;margin:12px 0}.experiment-result-links{display:flex;gap:15px;font-size:10px;color:#a35434;margin-top:18px}.experiment-result-links a:hover{text-decoration:underline}.lab-result-count{font-size:11px;color:#74856b;margin:15px 0}@media(max-width:700px){.experiment-search-controls{flex-wrap:wrap;padding:15px}.experiment-search-controls>div:first-child{flex-basis:100%}.experiment-search-controls>div:nth-child(2){flex:1;width:auto}.experiment-results{grid-template-columns:1fr}.experiment-search .catalog-heading{gap:12px}}

.lab-see-more-wrap{display:flex;justify-content:center;margin:28px 0 16px;width:100%}
.lab-see-more-btn{padding:13px 32px;font-size:13px;font-weight:600;border-radius:6px;cursor:pointer;border:1px solid #cbd6bd;background:#fffef8;color:#314f38;box-shadow:0 1px 3px rgba(0,0,0,0.04);transition:all .2s ease}
.lab-see-more-btn:hover{background:#314f38;color:#fffef8;border-color:#314f38;transform:translateY(-1px);box-shadow:0 3px 8px rgba(0,0,0,0.08)}
.lab-see-more-btn:active{transform:translateY(0)}

/* ==========================================================================
   OPENSTEM UNIFIED INITIATIVE · ECOSYSTEM STYLES (MATCHES SITE AESTHETIC)
   ========================================================================== */

.ecosystem-section{border-top:1px solid var(--line);padding-top:45px;margin:50px 0 35px}
.ecosystem-header{max-width:760px;margin-bottom:28px}
.ecosystem-header .eyebrow{color:var(--orange);font-size:9.5px;letter-spacing:1.8px;font-weight:700;display:block;margin-bottom:12px}
.ecosystem-header h2{font-size:clamp(26px,2.8vw,32px);font-weight:650;letter-spacing:-1.1px;color:var(--ink);margin:0 0 12px;line-height:1.2}
.ecosystem-header p{font-size:13px;color:#74866a;line-height:1.85;margin:0}

.ecosystem-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.ecosystem-card{background:#fffef8;border:1px solid #dfe4d6;border-radius:8px;padding:24px;display:flex;flex-direction:column;min-height:260px;transition:transform .15s ease,border-color .15s ease,box-shadow .15s ease}
.ecosystem-card:hover{border-color:#a8bc95;transform:translateY(-2px);box-shadow:0 6px 18px rgba(46,92,73,0.06)}

.eco-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}
.eco-icon{font-size:24px;line-height:1}
.eco-badge{display:inline-flex;align-items:center;gap:4px;font-size:8.5px;font-weight:700;padding:3px 8px;border-radius:4px;background:#eef5ea;border:1px solid #cbe0c3;color:#2e5c49;letter-spacing:0.3px}
.eco-badge.eco-badge-discord{background:#eef2ff;border:1px solid #c7d2fe;color:#4338ca}

.ecosystem-card h3{font-size:18px;font-weight:650;letter-spacing:-0.5px;margin:0 0 10px;line-height:1.35;color:var(--ink);font-family:'Manrope',Arial,sans-serif}
.ecosystem-card p{font-size:11.5px;color:#72826c;line-height:1.8;flex:1;margin:0}
.eco-link{display:inline-flex;align-items:center;gap:5px;font-size:11px;font-weight:600;color:var(--orange);margin-top:18px;text-decoration:none;transition:color .15s}
.eco-link:hover{color:#8f3b20;text-decoration:underline}

/* Header companion navigation */
.header-links .nav-companion{color:#435c4a;font-weight:600;transition:color .15s}
.header-links .nav-companion:hover{color:#2e5c49}
.header-links .nav-discord{display:inline-flex;align-items:center;gap:5px;background:rgba(88,101,242,0.08);border:1px solid rgba(88,101,242,0.32);color:#5865f2;font-weight:600;padding:6px 12px;border-radius:5px;transition:background .15s,color .15s}
.header-links .nav-discord:hover{background:#5865f2;color:#fff}
.discord-svg{display:inline-block;vertical-align:middle}

/* Multi-column Global Footer */
.site-footer{display:flex;flex-direction:column;border-top:1px solid var(--line);padding:45px 0 35px;color:#78866e;font-size:11px}
.footer-columns{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:35px;margin-bottom:35px}
.footer-col-brand .footer-logo{display:flex;align-items:center;gap:10px;font-family:'Manrope',Arial,sans-serif;font-size:21px;font-weight:800;letter-spacing:-1px;color:var(--ink);margin-bottom:12px}
.footer-col-brand .footer-logo em{font-style:normal;color:var(--orange)}
.footer-col-brand .footer-mission{font-size:11.5px;color:#6b7b65;line-height:1.75;max-width:320px;margin-bottom:16px}
.footer-contact{font-size:10.5px;color:#78866e}
.footer-contact span{display:block;margin-bottom:4px}
.footer-email{color:var(--orange);font-weight:600;font-size:11.5px}
.footer-email:hover{text-decoration:underline}
.footer-col h4{font-family:'Manrope',Arial,sans-serif;font-size:13px;font-weight:700;letter-spacing:-0.2px;color:var(--ink);margin:0 0 14px}
.footer-col nav{display:flex;flex-direction:column;gap:9px}
.footer-col nav a{color:#6c7d66;transition:color .15s;font-size:11.5px}
.footer-col nav a:hover{color:#2e5c49;text-decoration:underline}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;border-top:1px solid var(--line);padding-top:20px;font-size:10.5px;color:#85927c;flex-wrap:wrap;gap:12px}
.footer-bottom-links{display:flex;gap:8px}
.footer-bottom-links a{color:#6c7d66}
.footer-bottom-links a:hover{color:var(--orange);text-decoration:underline}

@media(max-width:1100px){
  .ecosystem-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-columns{grid-template-columns:1fr 1fr;gap:28px}
}
@media(max-width:700px){
  .ecosystem-section{padding-top:30px;margin:35px 0}
  .ecosystem-grid{grid-template-columns:1fr;gap:14px}
  .ecosystem-card{padding:20px;min-height:auto}
  .footer-columns{grid-template-columns:1fr;gap:25px}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px}
}

/* Header direct contact link */
.header-links .nav-contact{display:inline-flex;align-items:center;gap:5px;color:var(--orange);font-weight:600;padding:6px 11px;border-radius:5px;background:rgba(184,81,49,0.06);border:1px solid rgba(184,81,49,0.24);transition:all .15s}
.header-links .nav-contact:hover{background:var(--orange);color:#fff}
.mail-svg{display:inline-block;vertical-align:middle}

/* Missing Experiment Banner (After Subjects, Before Ecosystem) */
.missing-experiment-section{margin:35px 0 50px}
.missing-exp-card{display:flex;gap:26px;align-items:flex-start;background:#edf3e7;border:1px solid #d1dcc8;border-left:5px solid #2e5c49;border-radius:10px;padding:32px 34px}
.missing-exp-icon{font-size:36px;line-height:1;flex-shrink:0;padding-top:4px}
.missing-exp-content{flex:1}
.missing-exp-content .eyebrow{color:var(--orange);font-size:9px;letter-spacing:1.6px;font-weight:700;display:block;margin-bottom:10px}
.missing-exp-content h2{font-size:24px;font-weight:700;letter-spacing:-0.7px;color:#223c30;margin:0 0 12px;line-height:1.3}
.missing-exp-content p{font-size:13px;color:#5c6f59;line-height:1.8;margin:0 0 20px;max-width:880px}
.missing-exp-action{display:flex;align-items:center;gap:18px;flex-wrap:wrap}
.missing-email-btn{display:inline-flex;align-items:center;gap:8px;padding:12px 22px;background:#2e5c49;color:#fff;border-radius:6px;font-size:12px;font-weight:600;text-decoration:none;transition:background .15s,transform .15s;box-shadow:0 2px 6px rgba(46,92,73,0.18)}
.missing-email-btn:hover{background:#234738;color:#fff;transform:translateY(-1px);box-shadow:0 4px 12px rgba(46,92,73,0.25)}
.missing-exp-note{font-size:11px;color:#70846c}

/* Feedback, Proposals & Corrections Section (Before Footer) */
.feedback-proposal-section{margin:50px 0 35px;background:#fffef8;border:1px solid #dce4d4;border-radius:12px;padding:42px 38px}
.feedback-header{max-width:780px;margin-bottom:28px}
.feedback-header .eyebrow{color:var(--orange);font-size:9.5px;letter-spacing:1.8px;font-weight:700;display:block;margin-bottom:10px}
.feedback-header h2{font-size:clamp(24px,2.6vw,30px);font-weight:700;letter-spacing:-0.8px;color:var(--ink);margin:0 0 12px;line-height:1.25}
.feedback-header p{font-size:13px;color:#6d7f6b;line-height:1.8;margin:0}
.feedback-channels{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.feedback-btn{display:flex;align-items:center;gap:14px;padding:18px 22px;border-radius:8px;text-decoration:none;transition:all .18s ease;border:1px solid transparent}
.feedback-discord-btn{background:rgba(88,101,242,0.08);border-color:rgba(88,101,242,0.28);color:#4752c4}
.feedback-discord-btn:hover{background:#5865f2;color:#fff;transform:translateY(-2px);box-shadow:0 6px 18px rgba(88,101,242,0.25)}
.feedback-email-btn{background:rgba(184,81,49,0.08);border-color:rgba(184,81,49,0.25);color:#9e3d20}
.feedback-email-btn:hover{background:#b85131;color:#fff;transform:translateY(-2px);box-shadow:0 6px 18px rgba(184,81,49,0.25)}
.feedback-btn span{display:flex;flex-direction:column;font-size:13px;font-weight:700;line-height:1.35}
.feedback-btn small{font-size:11px;font-weight:400;opacity:0.85;margin-top:3px}
.feedback-discord-btn:hover small,.feedback-email-btn:hover small{color:#f8fafc;opacity:0.95}

@media(max-width:750px){
  .feedback-proposal-section{padding:26px 20px}
  .feedback-channels{grid-template-columns:1fr;gap:12px}
  .feedback-btn{padding:14px 16px}
  .missing-exp-card{flex-direction:column;gap:16px;padding:22px 18px}
  .missing-exp-content h2{font-size:20px}
  .missing-exp-action{flex-direction:column;align-items:flex-start;gap:10px}
  .missing-email-btn{width:100%;justify-content:center}
}