:root{--bg:#07100f;--panel:#0d1b18;--panel2:#10241f;--ink:#e7f3ee;--muted:#91aaa1;--line:#23463c;--green:#59f2a7;--green2:#1cbf78;--amber:#f4c86a;--max:1180px;--radius:18px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:radial-gradient(circle at 80% 0%,#102b24 0,#07100f 36%),var(--bg);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.65}a{color:var(--green);text-decoration:none}a:hover{color:#a0ffd0}img{max-width:100%;display:block}code,pre,.mono{font-family:"IBM Plex Mono","SFMono-Regular",Consolas,monospace}.wrap{width:min(var(--max),calc(100% - 40px));margin:auto}.topbar{position:sticky;top:0;z-index:20;background:rgba(7,16,15,.88);backdrop-filter:blur(14px);border-bottom:1px solid rgba(89,242,167,.12)}.nav{min-height:70px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;align-items:center;gap:11px;color:#fff;font-weight:800;letter-spacing:.08em}.brandmark{width:32px;height:32px;border:1px solid var(--green);border-radius:50%;position:relative;box-shadow:0 0 20px rgba(89,242,167,.2)}.brandmark:before,.brandmark:after{content:"";position:absolute;inset:50% auto auto 50%;background:var(--green);transform-origin:left center}.brandmark:before{width:12px;height:1px;transform:rotate(-22deg)}.brandmark:after{width:5px;height:5px;border-radius:50%;transform:translate(-2px,-2px)}.navlinks{display:flex;gap:22px;align-items:center;font-size:.94rem}.navlinks a{color:#c8d8d2}.navlinks a.active,.navlinks a:hover{color:var(--green)}.menu{display:none;background:none;border:1px solid var(--line);color:white;border-radius:10px;padding:8px 11px}.hero{padding:96px 0 72px;position:relative;overflow:hidden}.hero-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:56px;align-items:center}.kicker{color:var(--green);font-size:.78rem;letter-spacing:.2em;text-transform:uppercase;font-weight:800}.hero h1{font-size:clamp(3.2rem,8vw,7.4rem);line-height:.88;margin:.2em 0 .24em;letter-spacing:-.055em}.hero h1 span{display:block;color:var(--green);font-family:"IBM Plex Mono",Consolas,monospace;font-size:.31em;letter-spacing:.08em;margin-top:18px}.lead{font-size:clamp(1.12rem,2vw,1.38rem);color:#b8ccc4;max-width:760px}.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}.btn{display:inline-flex;align-items:center;justify-content:center;border-radius:999px;padding:12px 19px;font-weight:750;border:1px solid var(--line);color:#fff}.btn.primary{background:var(--green);color:#052016;border-color:var(--green)}.btn:hover{transform:translateY(-1px)}.radar{aspect-ratio:1;border:1px solid #2d6555;border-radius:50%;position:relative;background:radial-gradient(circle,#11362d 0 1px,transparent 2px),repeating-radial-gradient(circle,transparent 0 18%,rgba(89,242,167,.15) 18.3% 18.7%,transparent 19% 36%);box-shadow:inset 0 0 70px rgba(89,242,167,.06),0 0 70px rgba(0,0,0,.35);overflow:hidden}.radar:before,.radar:after{content:"";position:absolute;background:rgba(89,242,167,.18)}.radar:before{height:1px;left:0;right:0;top:50%}.radar:after{width:1px;top:0;bottom:0;left:50%}.sweep{position:absolute;width:50%;height:50%;left:50%;top:0;background:conic-gradient(from 88deg,rgba(89,242,167,.32),transparent 42deg);transform-origin:0 100%;animation:sweep 5s linear infinite}.blip{position:absolute;width:7px;height:7px;background:var(--green);border-radius:50%;box-shadow:0 0 12px var(--green)}.blip.b1{left:65%;top:31%}.blip.b2{left:31%;top:58%}.blip.b3{left:53%;top:70%}.radar-label{position:absolute;left:50%;bottom:12%;transform:translateX(-50%);font:700 .75rem/1 monospace;color:#81caaa;letter-spacing:.14em}@keyframes sweep{to{transform:rotate(360deg)}}.statbar{border-block:1px solid var(--line);background:rgba(14,34,29,.5)}.stats{display:grid;grid-template-columns:repeat(4,1fr)}.stat{padding:24px;border-right:1px solid var(--line)}.stat:last-child{border-right:0}.stat strong{font:800 1.55rem/1 monospace;color:var(--green);display:block;margin-bottom:8px}.stat span{font-size:.87rem;color:var(--muted)}section{padding:78px 0}.section-head{display:grid;grid-template-columns:.4fr 1fr;gap:40px;margin-bottom:38px}.section-head h2{font-size:clamp(2rem,4vw,3.2rem);line-height:1.05;margin:0;letter-spacing:-.04em}.section-head p{margin:0;color:#a9beb6;font-size:1.06rem}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.card{background:linear-gradient(180deg,rgba(16,36,31,.95),rgba(10,24,21,.95));border:1px solid var(--line);border-radius:var(--radius);padding:24px}.card .num{font:700 .8rem monospace;color:var(--green)}.card h3{font-size:1.3rem;margin:.6rem 0}.card p{color:#a7bab3;margin-bottom:0}.feature{display:grid;grid-template-columns:1fr 1fr;gap:34px;align-items:center}.feature.reverse .copy{order:2}.museum-img{border-radius:16px;border:1px solid var(--line);background:#091612;padding:8px;box-shadow:0 18px 60px rgba(0,0,0,.35)}.caption{font-size:.79rem;color:var(--muted);margin-top:8px}.quote{border-left:2px solid var(--green);padding:3px 0 3px 22px;margin:28px 0;font-size:1.35rem;color:#dff8ed}.timeline{position:relative;margin-left:12px}.timeline:before{content:"";position:absolute;left:10px;top:8px;bottom:8px;width:1px;background:var(--line)}.event{position:relative;padding-left:48px;margin:0 0 34px}.event:before{content:"";position:absolute;left:4px;top:8px;width:13px;height:13px;border-radius:50%;background:var(--bg);border:3px solid var(--green)}.event time{font:700 .8rem monospace;color:var(--green)}.event h3{margin:.2rem 0 .25rem;font-size:1.3rem}.event p{margin:0;color:#a7bab3}.codebox{background:#030807;border:1px solid #16362e;border-radius:14px;padding:20px;overflow:auto;color:#a9f4ca;font-size:.88rem;box-shadow:inset 0 0 40px rgba(89,242,167,.03)}.tag{display:inline-block;padding:5px 9px;border:1px solid var(--line);border-radius:999px;color:#9bc6b5;font:700 .72rem monospace;margin:3px}.page-hero{padding:78px 0 44px}.page-hero h1{font-size:clamp(2.8rem,7vw,5.8rem);line-height:.95;letter-spacing:-.05em;margin:.12em 0 .26em}.page-hero p{max-width:820px;font-size:1.18rem;color:#acc1b8}.prose{max-width:850px}.prose h2{font-size:2rem;margin-top:2.4em}.prose h3{font-size:1.35rem;margin-top:1.8em}.prose p{color:#c4d3cd}.prose .source-note{background:#0e201c;border:1px solid var(--line);border-radius:14px;padding:18px;color:#a9beb6}.compare{width:100%;border-collapse:collapse;margin:28px 0}.compare th,.compare td{padding:14px;border-bottom:1px solid var(--line);text-align:left}.compare th{color:var(--green);font:700 .78rem monospace;text-transform:uppercase;letter-spacing:.1em}.gallery{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}.gallery figure{margin:0}.archive-list{display:grid;gap:12px}.archive-item{display:flex;justify-content:space-between;gap:24px;padding:18px 0;border-bottom:1px solid var(--line)}.archive-item b{display:block}.archive-item span{color:var(--muted);font-size:.9rem}.notice{border:1px solid #6b5b2a;background:rgba(244,200,106,.07);border-radius:14px;padding:18px;color:#ddcfaa}.footer{margin-top:60px;border-top:1px solid var(--line);padding:35px 0 50px;color:#789087;font-size:.88rem}.footer-grid{display:flex;justify-content:space-between;gap:30px}.smallcaps{text-transform:uppercase;letter-spacing:.14em;font-size:.72rem;color:var(--muted);font-weight:800}@media(max-width:850px){.navlinks{display:none;position:absolute;top:70px;left:0;right:0;background:#081411;border-bottom:1px solid var(--line);padding:20px;flex-direction:column;align-items:flex-start}.navlinks.open{display:flex}.menu{display:block}.hero{padding-top:60px}.hero-grid,.feature,.section-head{grid-template-columns:1fr}.feature.reverse .copy{order:0}.radar{max-width:420px;margin:auto}.stats{grid-template-columns:1fr 1fr}.stat:nth-child(2){border-right:0}.stat:nth-child(-n+2){border-bottom:1px solid var(--line)}.cards{grid-template-columns:1fr}.gallery{grid-template-columns:1fr}.footer-grid{flex-direction:column}.page-hero{padding-top:55px}}@media(max-width:480px){.wrap{width:min(var(--max),calc(100% - 26px))}.stats{grid-template-columns:1fr}.stat{border-right:0!important;border-bottom:1px solid var(--line)}.stat:last-child{border-bottom:0}.hero h1{font-size:3.1rem}}

.atlas-icons{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}.atlas-icon{min-height:170px;border:1px solid var(--line);border-radius:14px;background:linear-gradient(180deg,#10241f,#091612);display:flex;flex-direction:column;align-items:center;justify-content:center;padding:16px;overflow:hidden}.atlas-icon img{height:105px;width:100%;object-fit:contain;filter:drop-shadow(0 0 8px rgba(89,242,167,.12))}.atlas-icon span{margin-top:10px;font:700 .72rem monospace;color:var(--muted)}.icon-stage{border:1px solid var(--line);border-radius:16px;background:radial-gradient(circle at 50% 50%,#153c31,#091612 68%);display:grid;grid-template-columns:repeat(3,1fr);align-items:center;padding:28px;min-height:300px}.icon-stage img{max-height:180px;justify-self:center;filter:drop-shadow(0 0 12px rgba(89,242,167,.25))}@media(max-width:850px){.atlas-icons{grid-template-columns:repeat(3,1fr)}}@media(max-width:480px){.atlas-icons{grid-template-columns:repeat(2,1fr)}.atlas-icon{min-height:140px}.atlas-icon img{height:80px}}

.memory-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.memory{border:1px solid var(--line);border-radius:var(--radius);padding:24px;background:linear-gradient(180deg,rgba(16,36,31,.85),rgba(10,24,21,.9))}.memory .meta{font:700 .74rem monospace;color:var(--green);letter-spacing:.08em;text-transform:uppercase}.memory blockquote{margin:14px 0 0;font-size:1.12rem;color:#d7e7e1}.evidence{border-left:3px solid var(--green);background:#0d211c;padding:18px 20px;border-radius:0 14px 14px 0;margin:24px 0}.evidence.amber{border-left-color:var(--amber)}.source-links{display:grid;gap:10px;margin:24px 0}.source-links a{border:1px solid var(--line);border-radius:12px;padding:14px 16px;background:#091612}.callout{padding:28px;border:1px solid var(--green);border-radius:var(--radius);background:radial-gradient(circle at 90% 10%,rgba(89,242,167,.12),transparent 38%),#0b1d19}.callout h2{margin-top:0}.big-number{font:800 clamp(2.5rem,7vw,5.5rem)/1 monospace;color:var(--green)}@media(max-width:850px){.memory-grid{grid-template-columns:1fr}}

/* ACARS protocol signature */
.protocol-strip{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:rgba(0,255,180,.025)}
.sync-sequence{font-family:var(--mono);font-size:clamp(1.35rem,3vw,2.6rem);letter-spacing:.04em;margin-bottom:12px}
.sync-sequence span{display:inline-block;margin-right:.22em;color:var(--green);text-shadow:0 0 18px rgba(83,255,190,.18)}
.sync-sequence b{font-size:.45em;letter-spacing:.14em;color:var(--muted);font-weight:600;vertical-align:middle}
.protocol-strip p{max-width:820px;color:var(--muted)}

.flow{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:10px;border:1px solid var(--line);border-radius:var(--radius);padding:28px;background:#091612}.flow span{font:800 .78rem monospace;color:var(--green);border:1px solid var(--line);border-radius:999px;padding:9px 12px}.flow b{color:var(--muted)}.flow.wide{margin-top:24px}@media(max-width:600px){.flow{align-items:stretch;flex-direction:column;text-align:center}.flow b{transform:rotate(90deg)}}


/* V13 — reconstructed Tcl/Tk Easter egg */
.retro-window{max-width:860px;margin:28px auto;border:2px solid #b9b9b9;background:#c9c9c9;color:#111;box-shadow:8px 10px 0 rgba(0,0,0,.28);font-family:Tahoma,"MS Sans Serif",sans-serif}
.retro-title{padding:5px 8px;background:linear-gradient(90deg,#173f83,#4d7ec1);color:white;font-weight:700;font-size:.86rem;border-bottom:2px solid #8b8b8b}
.retro-body{display:grid;grid-template-columns:180px 1fr;gap:16px;padding:18px}
.retro-author{border:2px inset #eee;background:#efefef;padding:8px;text-align:center}.retro-author img{width:100%;height:190px;object-fit:cover;filter:saturate(.82)}.retro-author small{display:block;margin-top:6px;color:#333}
.retro-games{display:grid;gap:12px;align-content:start}.retro-games button{text-align:left;border:2px outset #eee;background:#d5d5d5;color:#111;padding:10px 12px;font:700 .95rem Tahoma,"MS Sans Serif",sans-serif;cursor:default}.retro-games button span{display:block;font-weight:400;font-size:.82rem;margin-top:4px;color:#333}
.secret{max-width:860px;margin:18px auto;border:1px solid var(--line);border-radius:14px;padding:15px 18px;background:#091612}.secret summary{cursor:pointer;color:var(--green);font-weight:800}.secret-code{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin:18px 0}.secret-code kbd{border:1px solid #537167;border-bottom-width:3px;background:#10241f;border-radius:7px;padding:6px 9px;color:#eafff6;font:800 .85rem monospace}.secret-code b{color:var(--muted)}
.memory.memorial{background:linear-gradient(180deg,rgba(22,28,27,.95),rgba(8,15,13,.95));border-color:#51645e}.memory.memorial .meta{color:#c9d8d2}
@media(max-width:650px){.retro-body{grid-template-columns:1fr}.retro-author{max-width:220px;margin:auto;width:100%}}

.gallery.three{grid-template-columns:repeat(3,1fr)}.gallery.compact{gap:14px}.gallery .museum-img{width:100%;height:100%;object-fit:cover}.gallery figure{display:flex;flex-direction:column}.gallery figure .museum-img{flex:1;min-height:210px;max-height:420px}.caption strong{color:#dff8ed}@media(max-width:1000px){.gallery.three{grid-template-columns:1fr 1fr}}@media(max-width:650px){.gallery.three{grid-template-columns:1fr}}

/* V18.1 — statistics */
.stats-intro{padding-top:18px}.stats-hero-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.mega-stat{border:1px solid var(--line);border-radius:var(--radius);padding:24px;background:linear-gradient(180deg,rgba(16,36,31,.95),rgba(7,18,15,.98))}.mega-stat strong{display:block;font:800 clamp(2rem,4vw,3.6rem)/1 monospace;color:var(--green);letter-spacing:-.06em}.mega-stat span{display:block;color:var(--muted);margin-top:12px;font-size:.9rem}.table-scroll{overflow-x:auto}.stats-table .n{text-align:right;font-family:"IBM Plex Mono","SFMono-Regular",Consolas,monospace;color:#dff8ed;white-space:nowrap}.stats-table td:nth-child(1){white-space:nowrap}.stats-cards{margin-top:32px}.data-numbers{background:rgba(14,34,29,.28);border-block:1px solid var(--line)}.data-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:28px}.data-grid article{border:1px solid var(--line);border-radius:var(--radius);padding:24px;background:#091612}.data-grid strong{font:800 clamp(2.1rem,5vw,4rem)/1 monospace;color:var(--amber);display:block;letter-spacing:-.06em}.data-grid h3{margin:.7rem 0 .35rem}.data-grid p{color:#a7bab3}.data-grid small{color:#6f8e82;font:700 .68rem monospace;text-transform:uppercase;letter-spacing:.08em}@media(max-width:950px){.stats-hero-grid,.data-grid{grid-template-columns:1fr 1fr}}@media(max-width:560px){.stats-hero-grid,.data-grid{grid-template-columns:1fr}.stats-table td,.stats-table th{padding:10px 12px}.mega-stat{padding:20px}}
/* V18.3 — opinionated source review */
.review-table .review-score{font:800 1rem/1 "IBM Plex Mono","SFMono-Regular",Consolas,monospace;color:var(--green);white-space:nowrap}.review-table .review-score.mid{color:var(--amber)}.review-table .review-score.low{color:#e89b82}.review-final{display:grid;grid-template-columns:1fr auto;gap:11px 22px;align-items:baseline;margin-top:18px}.review-final span{color:#a7bab3}.review-final b{font:800 1.05rem/1 monospace;color:var(--green)}@media(max-width:560px){.review-final{grid-template-columns:1fr auto;gap:10px 14px}.review-table td:nth-child(3){min-width:330px}}