:root{
  --bg:#07090d;--bg2:#0c1016;--panel:rgba(14,19,26,.92);--panel2:rgba(20,27,36,.94);
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  --line:rgba(100,255,199,.25);--shadow:0 20px 60px rgba(0,0,0,.35)
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*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-height:100vh;background:#07090d;color:var(--text);font-family:Inter,"Segoe UI",Arial,sans-serif;line-height:1.55;overflow-x:hidden}
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a{color:inherit}.bar{position:sticky;top:0;z-index:10;border-bottom:1px solid var(--line);background:rgba(6,9,13,.92);backdrop-filter:blur(14px);box-shadow:0 5px 30px rgba(0,0,0,.34)}.bar-inner{max-width:1120px;margin:auto;padding:15px 22px;display:flex;gap:24px;align-items:center;justify-content:space-between}.brand{display:flex;gap:13px;align-items:center;text-decoration:none}.brand-mark{font-size:34px;line-height:1;color:var(--accent);text-shadow:0 0 18px color-mix(in srgb,var(--accent) 60%,transparent)}.brand b{display:block;font-size:20px;letter-spacing:.05em}.brand small{display:block;color:var(--muted);font-size:10px;letter-spacing:.15em}.nav{display:flex;gap:7px;flex-wrap:wrap}.nav a{padding:8px 11px;border:1px solid transparent;border-radius:8px;text-decoration:none;color:#d9e0e4;font-size:14px}.nav a:hover,.nav a.active{border-color:var(--line);color:var(--accent);background:rgba(255,255,255,.03)}
main{max-width:1120px;margin:auto;padding:48px 22px 72px}.hero{padding:48px;border:1px solid var(--line);border-radius:20px;background:linear-gradient(135deg,color-mix(in srgb,var(--accent) 7%,transparent),color-mix(in srgb,var(--accent2) 3%,transparent)),var(--panel);box-shadow:var(--shadow)}.eyebrow{font-weight:800;color:var(--accent);font-size:11px;letter-spacing:.2em;text-transform:uppercase}.hero h1{font-size:clamp(36px,6vw,64px);line-height:1.03;margin:10px 0 16px}.hero p{max-width:890px;font-size:17px;color:#c9d1d7}.actions{display:flex;gap:11px;flex-wrap:wrap;margin-top:24px}.btn{display:inline-block;padding:11px 16px;border-radius:9px;text-decoration:none;font-weight:750;border:1px solid var(--line);background:rgba(255,255,255,.035)}.btn.primary{background:var(--accent);color:#07110d;border-color:var(--accent)}body.eski .btn.primary{color:#0d0915}.btn:hover{transform:translateY(-1px);filter:brightness(1.05)}
.section-head{display:flex;align-items:center;gap:14px;margin:46px 0 18px}.section-head h2{margin:0;font-size:23px}.section-head:after{content:"";height:1px;flex:1;background:linear-gradient(90deg,var(--line),transparent)}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(245px,1fr));gap:14px}.card{padding:22px;border:1px solid rgba(255,255,255,.10);border-radius:13px;background:var(--panel2);box-shadow:0 9px 27px rgba(0,0,0,.17)}.card h3{margin:0 0 8px;font-size:19px;color:var(--accent)}.card p{color:var(--muted);margin:0 0 13px}.card a.more{color:var(--accent2);text-decoration:none;font-weight:700}.tagrow{display:flex;flex-wrap:wrap;gap:7px;margin:12px 0}.tag{border:1px solid rgba(255,255,255,.10);background:rgba(255,255,255,.035);color:#cdd6dc;padding:4px 8px;border-radius:999px;font-size:11px}.feature{display:grid;grid-template-columns:1.35fr .65fr;gap:16px}.panel{padding:28px;border:1px solid rgba(255,255,255,.10);border-radius:14px;background:var(--panel)}.panel h2,.panel h3{margin-top:0}.panel p,.panel li{color:#bac4cb}.stat{font-size:31px;font-weight:850;color:var(--accent)}.stat-label{color:var(--muted);font-size:12px;text-transform:uppercase;letter-spacing:.12em}.quote{border-left:3px solid var(--accent);padding-left:18px;color:#c7d0d6;font-size:17px}.notice{padding:14px 17px;border:1px solid color-mix(in srgb,var(--warm) 30%,transparent);background:color-mix(in srgb,var(--warm) 5%,transparent);border-radius:10px;color:#d8d1bb}
.download-table{width:100%;border-collapse:separate;border-spacing:0 9px}.download-table td{padding:13px 14px;background:var(--panel2);border-top:1px solid rgba(255,255,255,.08);border-bottom:1px solid rgba(255,255,255,.08)}.download-table td:first-child{border-left:1px solid rgba(255,255,255,.08);border-radius:9px 0 0 9px}.download-table td:last-child{border-right:1px solid rgba(255,255,255,.08);border-radius:0 9px 9px 0;text-align:right}.download-table a{text-decoration:none;color:var(--accent);font-weight:750}.mono{font-family:ui-monospace,SFMono-Regular,Consolas,monospace}.muted{color:var(--muted)}footer{max-width:1120px;margin:auto;padding:22px;border-top:1px solid rgba(255,255,255,.08);color:#76828a;font-size:12px;text-align:center}.project-links{display:flex;gap:8px;flex-wrap:wrap}.project-links a{font-size:13px;padding:7px 9px;border:1px solid rgba(255,255,255,.10);border-radius:7px;text-decoration:none}.project-links a:hover{border-color:var(--accent);color:var(--accent)}
@media(max-width:760px){.bar-inner{align-items:flex-start;flex-direction:column;gap:9px}.hero{padding:30px 23px}.feature{grid-template-columns:1fr}.download-table,.download-table tbody,.download-table tr,.download-table td{display:block;width:100%}.download-table tr{margin-bottom:12px}.download-table td{border-left:1px solid rgba(255,255,255,.08)!important;border-right:1px solid rgba(255,255,255,.08)!important;border-radius:0!important}.download-table td:first-child{border-radius:9px 9px 0 0!important}.download-table td:last-child{border-radius:0 0 9px 9px!important;text-align:left}}

.eski-shop-feature{margin-top:22px;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:22px 25px;border-radius:15px;border:1px solid rgba(255,215,122,.5);background:linear-gradient(120deg,rgba(255,215,122,.1),rgba(181,156,255,.04)),rgba(18,16,13,.92)}.eski-shop-feature h2{margin:3px 0 4px;color:#ffe3a0}.eski-shop-feature p{margin:0;color:#cfc6ae}@media(max-width:760px){.eski-shop-feature{align-items:flex-start;flex-direction:column}}

pre{overflow:auto;padding:15px;border-radius:9px;background:#05070a;border:1px solid rgba(255,255,255,.1);color:#cfe5dd}code{font-family:ui-monospace,SFMono-Regular,Consolas,monospace}

/* Guides / visual atlas */
.hero.hero-art{position:relative;overflow:hidden;background-size:cover;background-position:center;border-color:color-mix(in srgb,var(--accent) 35%,transparent)}
.hero.hero-art:before{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(8,8,13,.30),rgba(8,8,13,.82) 58%,rgba(8,8,13,.94));pointer-events:none}
.hero.hero-art > *{position:relative;z-index:1}
.hero.hero-art .actions{margin-top:18px}
.split{display:grid;grid-template-columns:1.1fr .9fr;gap:18px}
.guide-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:16px}
.guide-card{display:flex;flex-direction:column;overflow:hidden;border:1px solid rgba(255,255,255,.10);border-radius:16px;background:var(--panel2);box-shadow:var(--shadow)}
.guide-card figure,.guide-panel figure,.image-frame{margin:0;position:relative;overflow:hidden;background:#06070b}
.guide-card img,.guide-panel img,.image-frame img,.visual-strip img{display:block;width:100%;height:auto}
.guide-card figure{aspect-ratio:16/9}
.guide-card figure img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.guide-card:hover figure img{transform:scale(1.03)}
.guide-card .card-body{padding:18px 18px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.guide-card h3{margin:0;color:var(--accent);font-size:22px}
.guide-card p{margin:0;color:var(--muted)}
.guide-meta{display:flex;gap:8px;flex-wrap:wrap}
.guide-meta span{font-size:11px;padding:4px 8px;border-radius:999px;border:1px solid rgba(255,255,255,.1);background:rgba(255,255,255,.04);color:#d4dce0}
.guide-card .project-links{margin-top:auto}
.guide-intro{display:grid;grid-template-columns:1.2fr .8fr;gap:16px;align-items:start}
.guide-panel{padding:0;border:1px solid rgba(255,255,255,.10);border-radius:16px;background:var(--panel);overflow:hidden}
.guide-panel .panel-copy{padding:24px}
.guide-panel .panel-copy h2,.guide-panel .panel-copy h3{margin-top:0}
.guide-panel .panel-copy p,.guide-panel .panel-copy li{color:#bcc7cf}
.guide-panel .panel-copy ul{padding-left:20px}
.guide-columns{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.caption{font-size:13px;color:var(--muted);padding:12px 14px 14px}
.article-nav{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-top:24px}
.kicker-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:10px;margin:16px 0 0}
.kicker{padding:14px 15px;border:1px solid rgba(255,255,255,.09);border-radius:12px;background:rgba(255,255,255,.035)}
.kicker b{display:block;color:var(--accent);font-size:13px;margin-bottom:3px}
.kicker small{display:block;color:var(--muted);font-size:12px;line-height:1.45}
.visual-strip{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px}
.visual-strip a{display:block;border:1px solid rgba(255,255,255,.09);border-radius:12px;overflow:hidden;background:var(--panel2);text-decoration:none}
.visual-strip img{aspect-ratio:16/9;object-fit:cover}
.visual-strip span{display:block;padding:10px 12px;color:#d5dde3;font-size:13px}
.side-list{padding:22px;border:1px solid rgba(255,255,255,.10);border-radius:16px;background:var(--panel)}
.side-list h3{margin-top:0}
.side-list ul{padding-left:18px;margin:0}
.side-list li{margin:8px 0;color:#c6cfd5}
.masonry-2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.note-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px}
.note{padding:16px;border-radius:12px;border:1px solid rgba(255,255,255,.09);background:rgba(255,255,255,.03)}
.note h4{margin:0 0 8px;color:var(--accent2)}
.note p{margin:0;color:#c0cad1;font-size:14px}
.guides-cta{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:24px 26px;border:1px solid rgba(255,255,255,.12);border-radius:16px;background:linear-gradient(120deg,color-mix(in srgb,var(--accent) 9%,transparent),color-mix(in srgb,var(--accent2) 7%,transparent)),var(--panel)}
.guides-cta h2{margin:0 0 4px}
.guides-cta p{margin:0;color:#cdd5db}
@media(max-width:900px){.split,.guide-intro,.guide-columns,.masonry-2{grid-template-columns:1fr}.guides-cta{align-items:flex-start;flex-direction:column}}

/* 2026-09-12 books / science / software atlas */
.atlas-banner{display:block;width:100%;height:auto;border-radius:16px;border:1px solid rgba(255,255,255,.12);box-shadow:var(--shadow)}
.book-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:16px}.book-card{overflow:hidden;border:1px solid rgba(255,255,255,.1);border-radius:16px;background:var(--panel2)}.book-card figure{margin:0;aspect-ratio:4/3;background:#05070a;overflow:hidden}.book-card figure img{width:100%;height:100%;object-fit:cover}.book-card .body{padding:18px}.book-card h3{margin:0 0 8px;color:var(--accent)}.book-card p{color:var(--muted)}
.silver-card{border:1px solid rgba(220,229,239,.72);background:linear-gradient(135deg,rgba(230,236,244,.13),rgba(140,154,173,.05)),var(--panel);box-shadow:0 0 32px rgba(210,220,235,.09)}.silver-card h2,.silver-card h3{color:#e8eef5}.silver-link{background:linear-gradient(180deg,#eef3f7,#9faebb);color:#111722!important;border:1px solid #f7fbff!important;box-shadow:0 0 20px rgba(220,232,245,.18)}
.chime-card{border:1px solid rgba(69,255,153,.8);background:linear-gradient(120deg,rgba(42,238,126,.20),rgba(9,68,38,.18)),var(--panel);box-shadow:0 0 34px rgba(42,238,126,.12)}.chime-card h2{color:#8effb9}.chime-sign{font:800 27px ui-monospace,SFMono-Regular,Consolas,monospace;letter-spacing:.02em}.copy-btn{cursor:pointer;color:#caffdc;border:1px solid rgba(142,255,185,.45);background:rgba(255,255,255,.04);padding:9px 12px;border-radius:8px;font-weight:750}
.math-proof{padding:20px;border:1px solid rgba(117,186,255,.25);border-radius:14px;background:rgba(8,16,29,.8)}.math-proof .eq{font-family:Georgia,'Times New Roman',serif;font-size:clamp(18px,2.4vw,27px);line-height:1.65;overflow-wrap:anywhere}.math-proof strong{color:var(--accent2)}
.doc-gallery{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px}.doc-gallery figure{margin:0;border:1px solid rgba(255,255,255,.09);border-radius:12px;overflow:hidden;background:#080a0f}.doc-gallery img{display:block;width:100%;height:240px;object-fit:cover}.doc-gallery figcaption{padding:9px 11px;color:#bcc7cf;font-size:12px}
.software-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:16px}.software-card{border:1px solid rgba(255,255,255,.1);border-radius:15px;background:var(--panel2);overflow:hidden}.software-card img{display:block;width:100%;height:auto;background:#070a12}.software-card .body{padding:18px}.software-card h3{margin:0 0 8px;color:var(--accent2)}
.disclaimer{font-size:12px;color:#aeb9c1;padding:12px 14px;border-left:3px solid var(--warm);background:rgba(255,215,122,.04)}
@media(max-width:700px){.doc-gallery img{height:auto}}

/* Research library additions */
.book-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px}.book-card{overflow:hidden;border:1px solid rgba(255,255,255,.10);border-radius:16px;background:var(--panel2);display:flex;flex-direction:column}.book-card figure{margin:0;aspect-ratio:4/3;background:#080a0f;overflow:hidden}.book-card figure img{width:100%;height:100%;object-fit:cover}.book-card .body{padding:18px;display:flex;flex-direction:column;gap:9px;flex:1}.book-card h3{margin:0;color:var(--accent)}.book-card p{margin:0;color:var(--muted)}
.page-gallery{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:14px}.page-gallery figure{margin:0;padding:9px;border:1px solid rgba(255,255,255,.10);border-radius:12px;background:var(--panel2)}.page-gallery img{display:block;width:100%;height:auto;border-radius:7px;background:white}.page-gallery figcaption{padding:8px 3px 1px;color:var(--muted);font-size:12px}
.symbol-key{display:grid;grid-template-columns:repeat(auto-fit,minmax(245px,1fr));gap:10px}.symbol-key>div{display:grid;grid-template-columns:auto 1fr;column-gap:10px;row-gap:3px;padding:14px;border:1px solid rgba(255,255,255,.10);border-radius:11px;background:var(--panel2)}.symbol-key code{grid-row:1/3;font-size:18px;color:var(--accent2);align-self:start}.symbol-key b{color:var(--accent)}.symbol-key span{color:var(--muted);font-size:13px}
.support-strip{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:22px}.support-strip .panel{min-height:100%}@media(max-width:760px){.support-strip{grid-template-columns:1fr}}