/* ── Space AL — Main CSS ── */
:root {
  --bg:#000; --surface:#0a0a0a; --surface2:#111;
  --border:rgba(255,255,255,.05); --border2:rgba(255,255,255,.09);
  --text:#fff; --muted:#6b7280; --r:0;
  --green:#4ade80; --amber:#fbbf24; --red:#f87171;
  --nav-h:72px;
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{background:var(--bg);color:var(--text);font-family:'Space Grotesk',sans-serif;line-height:1.6;overflow-x:hidden;}

/* STARS */
#stars-canvas{position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.4;}

/* ── NAV ── */
nav{position:fixed;top:0;left:0;right:0;z-index:200;display:flex;align-items:center;justify-content:space-between;padding:0 3rem;height:var(--nav-h);background:rgba(0,0,0,.8);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--border);}
.nav-logo{font-family:'Space Grotesk',sans-serif;font-weight:700;font-size:1rem;color:#fff;text-decoration:none;letter-spacing:.22em;text-transform:uppercase;flex-shrink:0;}
.nav-links{display:flex;gap:2rem;list-style:none;}
.nav-links a{color:rgba(255,255,255,.45);text-decoration:none;font-size:.72rem;letter-spacing:.12em;text-transform:uppercase;transition:color .2s;font-weight:500;position:relative;padding-bottom:2px;}
.nav-links a::after{content:'';position:absolute;bottom:-2px;left:0;right:0;height:1px;background:#fff;transform:scaleX(0);transform-origin:left;transition:transform .2s;}
.nav-links a:hover,.nav-links a.active{color:#fff;}
.nav-links a:hover::after,.nav-links a.active::after{transform:scaleX(1);}
.nav-right{display:flex;align-items:center;gap:.75rem;flex-shrink:0;}
.nav-burger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:4px;background:none;border:none;}
.nav-burger span{display:block;width:22px;height:1px;background:#fff;transition:all .25s;}
.nav-burger.open span:nth-child(1){transform:translateY(6px) rotate(45deg);}
.nav-burger.open span:nth-child(2){opacity:0;}
.nav-burger.open span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}
@media(max-width:820px){
  nav{padding:0 1.5rem;}
  .nav-links{display:none;position:fixed;top:var(--nav-h);left:0;right:0;background:rgba(0,0,0,.98);flex-direction:column;padding:2rem 1.5rem;gap:1.5rem;border-bottom:1px solid var(--border);z-index:199;}
  .nav-links.open{display:flex;}
  .nav-burger{display:flex;}
  .nav-links a{font-size:.85rem;}
}

/* LANG TOGGLE */
.lang-toggle{background:transparent;border:1px solid rgba(255,255,255,.18);color:rgba(255,255,255,.55);font-family:'JetBrains Mono',monospace;font-size:.65rem;font-weight:600;letter-spacing:.12em;padding:.3rem .7rem;cursor:pointer;transition:all .2s;flex-shrink:0;}
.lang-toggle:hover{border-color:rgba(255,255,255,.5);color:#fff;}

/* BACK TO TOP */
.back-to-top{position:fixed;bottom:2rem;right:2rem;z-index:100;width:40px;height:40px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);color:rgba(255,255,255,.6);font-size:1rem;cursor:pointer;display:flex;align-items:center;justify-content:center;opacity:0;pointer-events:none;transition:opacity .3s,background .2s,color .2s;line-height:1;}
.back-to-top.visible{opacity:1;pointer-events:all;}
.back-to-top:hover{background:rgba(255,255,255,.16);color:#fff;}

/* BUTTONS */
.btn{display:inline-flex;align-items:center;gap:.5rem;padding:.75rem 1.9rem;font-size:.78rem;font-weight:600;text-decoration:none;cursor:pointer;border:none;font-family:inherit;transition:all .2s;letter-spacing:.1em;text-transform:uppercase;}
.btn-primary{background:#fff;color:#000;}
.btn-primary:hover{background:rgba(255,255,255,.88);transform:translateY(-1px);}
.btn-outline{background:transparent;border:1px solid rgba(255,255,255,.25);color:#fff;}
.btn-outline:hover{border-color:#fff;background:rgba(255,255,255,.05);}
.btn-sm{padding:.5rem 1.2rem;font-size:.7rem;}

/* PAGE HEADER */
.page-header{position:relative;z-index:1;padding:9rem 3rem 5rem;max-width:1200px;margin:0 auto;}
.page-header .section-label{font-size:.65rem;letter-spacing:.3em;text-transform:uppercase;color:rgba(255,255,255,.3);margin-bottom:.75rem;}
.page-header h1{font-size:clamp(2.2rem,6vw,4.5rem);font-weight:700;letter-spacing:-.02em;line-height:.92;margin-bottom:1.25rem;}
.page-header p{color:var(--muted);font-size:.95rem;max-width:580px;line-height:1.8;}

/* SECTIONS */
section{position:relative;z-index:1;}
.section-inner{max-width:1200px;margin:0 auto;padding:6rem 3rem;}
@media(max-width:760px){.section-inner{padding:4rem 1.5rem;}.page-header{padding:8rem 1.5rem 3rem;}}
.section-label{font-size:.65rem;letter-spacing:.3em;text-transform:uppercase;color:rgba(255,255,255,.3);margin-bottom:.75rem;}
.section-title{font-size:clamp(1.6rem,3.5vw,2.5rem);font-weight:700;letter-spacing:-.01em;margin-bottom:1.25rem;}
.section-desc{color:var(--muted);max-width:600px;font-size:.95rem;margin-bottom:3rem;line-height:1.8;}
.alt-bg{background:var(--surface);}
.border-top{border-top:1px solid var(--border);}

/* SPEC LIST */
.spec-list{list-style:none;}
.spec-list li{display:flex;align-items:flex-start;gap:.6rem;padding:.55rem 0;border-bottom:1px solid var(--border);font-size:.86rem;}
.spec-list li:last-child{border:none;}
.spec-list .key{color:var(--muted);min-width:130px;flex-shrink:0;font-size:.78rem;}
.spec-list .val{color:#fff;}

/* BADGES */
.badge{display:inline-block;padding:.18rem .55rem;font-size:.68rem;font-weight:600;font-family:'JetBrains Mono',monospace;letter-spacing:.04em;border:1px solid;}
.badge-cyan,.badge-purple{border-color:rgba(255,255,255,.2);color:#fff;background:rgba(255,255,255,.06);}
.badge-green{border-color:rgba(74,222,128,.3);color:var(--green);background:rgba(74,222,128,.06);}
.badge-amber{border-color:rgba(251,191,36,.3);color:var(--amber);background:rgba(251,191,36,.06);}
.badge-red{border-color:rgba(248,113,113,.3);color:var(--red);background:rgba(248,113,113,.06);}

/* CHIPS */
.chip{display:inline-flex;align-items:center;gap:.35rem;padding:.2rem .7rem;font-size:.72rem;font-weight:500;border:1px solid;}
.chip-cyan{border-color:rgba(255,255,255,.15);color:rgba(255,255,255,.65);background:rgba(255,255,255,.04);}
.chip-green{border-color:rgba(74,222,128,.25);color:var(--green);background:rgba(74,222,128,.04);}
.chip-amber{border-color:rgba(251,191,36,.25);color:var(--amber);background:rgba(251,191,36,.04);}
.chips-row{display:flex;flex-wrap:wrap;gap:.35rem;margin-top:1rem;}

/* CODE BLOCK */
.code-block{background:#080808;border:1px solid var(--border);padding:1.3rem;font-family:'JetBrains Mono',monospace;font-size:.74rem;color:#6b7280;overflow-x:auto;margin-top:.7rem;line-height:1.9;}
.code-block .kw{color:#c4b5fd;}.code-block .ty{color:#fff;}.code-block .cm{color:#374151;font-style:italic;}.code-block .str{color:var(--green);}.code-block .num{color:var(--amber);}

/* FOOTER */
footer{position:relative;z-index:1;background:var(--surface);border-top:1px solid var(--border);text-align:center;padding:4rem 2rem;color:var(--muted);font-size:.82rem;}
.foot-logo{font-size:1rem;font-weight:700;color:#fff;margin-bottom:.5rem;letter-spacing:.22em;text-transform:uppercase;}
.foot-divider{width:32px;height:1px;background:var(--border2);margin:1.5rem auto;}
footer a{color:rgba(255,255,255,.4);text-decoration:none;transition:color .2s;}
footer a:hover{color:#fff;}
.foot-links{display:flex;justify-content:center;gap:2rem;flex-wrap:wrap;margin-top:1.5rem;font-size:.74rem;}

/* REVEAL */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease;}
.reveal.visible{opacity:1;transform:none;}

/* ANIMATIONS */
@keyframes fadeUp{from{opacity:0;transform:translateY(14px);}to{opacity:1;transform:none;}}
@keyframes bounce{0%,100%{transform:translateX(-50%) translateY(0);}50%{transform:translateX(-50%) translateY(-7px);}}
@keyframes pulse-dot{0%,100%{opacity:1;transform:scale(1);}50%{opacity:.35;transform:scale(.72);}}

/* ── CHANGELOG / PYTHON TIMELINE (shared) ── */
.cl-wrap{position:relative;padding-left:1px;}
.cl-line{position:absolute;left:0;top:0;bottom:0;width:1px;background:var(--border2);}
.cl-item{position:relative;margin-bottom:0;padding-left:2.5rem;border-bottom:1px solid var(--border);}
.cl-item:last-child{border-bottom:none;}
.cl-dot{position:absolute;left:-5px;top:2rem;width:11px;height:11px;border-radius:50%;background:#222;border:1px solid rgba(255,255,255,.15);}
.cl-dot.minor{background:#333;}
.cl-dot.major{background:#fff;}
.cl-dot.milestone{background:var(--green);}
.cl-card{padding:2rem 0 2rem;}
.cl-header{display:flex;align-items:baseline;gap:1rem;flex-wrap:wrap;margin-bottom:1.25rem;}
.cl-ver{font-family:'JetBrains Mono',monospace;font-size:1rem;font-weight:700;color:#fff;min-width:3.5rem;}
.cl-title{font-size:.95rem;font-weight:600;flex:1;}
.cl-date{font-size:.72rem;color:var(--muted);letter-spacing:.04em;}
.cl-major-label{font-size:.66rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;padding:.18rem .6rem;border:1px solid rgba(255,255,255,.2);color:rgba(255,255,255,.5);}
.cl-milestone-label{font-size:.66rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;padding:.18rem .6rem;border:1px solid rgba(74,222,128,.3);color:var(--green);}
.cl-desc{color:var(--muted);font-size:.86rem;line-height:1.78;margin-bottom:1.25rem;max-width:680px;}
.cl-section-label{font-size:.65rem;font-weight:700;text-transform:uppercase;letter-spacing:.14em;margin-bottom:.45rem;margin-top:1rem;}
.cl-section-label:first-of-type{margin-top:0;}
.cl-section-label.updates{color:var(--green);}
.cl-section-label.bugs{color:var(--red);}
.cl-section-label.fixed{color:var(--amber);}
.cl-section-label.hardware{color:rgba(255,255,255,.45);}
.cl-list{list-style:none;margin-bottom:.25rem;}
.cl-list li{font-size:.84rem;padding:.22rem 0 .22rem 1.4rem;position:relative;color:rgba(255,255,255,.75);}
.cl-list.updates li::before{content:'+';color:var(--green);position:absolute;left:0;font-family:'JetBrains Mono',monospace;font-size:.8rem;}
.cl-list.bugs li::before{content:'!';color:var(--red);position:absolute;left:1px;font-weight:700;font-family:'JetBrains Mono',monospace;font-size:.8rem;}
.cl-list.fixed li::before{content:'✓';color:var(--amber);position:absolute;left:0;font-size:.75rem;}
.cl-list.hardware li::before{content:'—';color:rgba(255,255,255,.25);position:absolute;left:0;font-size:.7rem;}
.cl-list li code{font-family:'JetBrains Mono',monospace;font-size:.78rem;color:rgba(255,255,255,.55);background:rgba(255,255,255,.06);padding:.05rem .35rem;border:1px solid var(--border);}
.cl-chips{display:flex;flex-wrap:wrap;gap:.35rem;margin-top:1.1rem;}
.cl-chip{font-size:.7rem;padding:.18rem .65rem;border:1px solid;}
.cl-chip.lib{border-color:rgba(255,255,255,.15);color:rgba(255,255,255,.5);}
.cl-chip.sensor{border-color:rgba(255,255,255,.2);color:rgba(255,255,255,.65);}
.cl-chip.hw{border-color:rgba(74,222,128,.25);color:var(--green);}
.cl-chip.ui{border-color:rgba(255,255,255,.2);color:rgba(255,255,255,.65);}
.cl-chip.src{border-color:rgba(251,191,36,.25);color:var(--amber);}

/* SUMMARY BAR (changelog/python) */
.summary-bar{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));border:1px solid var(--border);margin-bottom:4rem;}
.summary-cell{padding:1.75rem 1rem;text-align:center;border-right:1px solid var(--border);}
.summary-cell:last-child{border-right:none;}
.summary-num{font-size:2rem;font-weight:700;letter-spacing:-.03em;color:#fff;}
.summary-label{font-size:.66rem;color:var(--muted);margin-top:.4rem;text-transform:uppercase;letter-spacing:.1em;}