:root{--bg: #0a0a0a;--bg-secondary: #141414;--bg-tertiary: #1a1a1a;--text: #e5e5e5;--text-muted: #888;--text-dim: #666;--accent: #fff;--accent-hover: #ccc;--border: #333;--border-light: #444;--fortran-color: #734f96;--rust-color: #dea584}*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,SF Pro Text,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;line-height:1.6;color:var(--text);background:var(--bg);padding:2rem;min-height:100vh}.container{max-width:900px;margin:0 auto}header{text-align:center;margin-bottom:3rem;padding-bottom:2rem;border-bottom:1px solid var(--border)}h1{font-size:3rem;font-weight:600;margin-bottom:.5rem;color:var(--text);letter-spacing:-.02em}.tagline{color:var(--text-muted);font-size:1.1rem;font-weight:400}h2{font-size:1.5rem;font-weight:500;margin-top:2.5rem;margin-bottom:1rem;color:var(--text)}nav{margin-top:1.5rem}nav a{display:inline-block;margin:0 1rem;color:var(--text-muted);text-decoration:none;font-weight:500;transition:color .2s}nav a:hover{color:var(--text)}nav a.active{color:var(--accent)}.btn{display:inline-block;padding:.75rem 1.5rem;background:var(--accent);color:var(--bg);text-decoration:none;border-radius:6px;font-weight:600;transition:all .2s;margin:.5rem;border:none;cursor:pointer}.btn:hover{background:var(--accent-hover)}.btn-secondary{background:transparent;color:var(--text);border:1px solid var(--border-light)}.btn-secondary:hover{background:var(--bg-tertiary);border-color:var(--text-muted)}.version-card{background:var(--bg-secondary);border:1px solid var(--border);border-radius:8px;padding:1.5rem;margin-bottom:1.5rem}.version-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem}.version-number{font-size:1.25rem;font-weight:600;color:var(--text)}.version-date{color:var(--text-muted);font-size:.9rem}.changelog{background:var(--bg-tertiary);padding:1rem;border-radius:4px;margin-top:1rem;white-space:pre-wrap;font-family:SF Mono,Menlo,Monaco,Courier New,monospace;font-size:.85rem;color:var(--text-muted);border:1px solid var(--border)}details summary{cursor:pointer;color:var(--text-muted);font-weight:500}details summary:hover{color:var(--text)}p{color:var(--text-muted)}a{color:var(--text)}ul{color:var(--text-muted)}code{font-family:SF Mono,Menlo,Monaco,Courier New,monospace;background:var(--bg-tertiary);padding:.2rem .4rem;border-radius:4px;font-size:.9em}.lang-toggle{display:flex;justify-content:center;gap:0;margin:2rem 0;position:relative}.lang-toggle:after{content:"";position:absolute;bottom:0;left:var(--underline-left, 0);width:var(--underline-width, 0);height:2px;background:var(--fortran-color);transition:left .3s ease,width .3s ease,background-color .3s ease;pointer-events:none}.lang-toggle.rust:after{background:var(--rust-color)}.lang-btn{background:none;border:none;font-size:1.1rem;font-weight:500;color:var(--text-dim);cursor:pointer;padding:.5rem 1.5rem;transition:color .2s;font-family:inherit;position:relative}.lang-btn:hover{color:var(--text-muted)}.lang-btn.active{color:var(--text)}.lang-btn.active[data-lang=fortran]{color:var(--fortran-color)}.lang-btn.active[data-lang=rust]{color:var(--rust-color)}.lang-content{animation:fadeIn .3s ease}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.terminal-wrapper{max-width:600px;margin:2rem auto}.terminal{background:var(--bg-secondary);border-radius:8px;overflow:hidden;box-shadow:0 4px 24px #0006;font-family:SF Mono,Menlo,Monaco,Courier New,monospace;font-size:14px;border:1px solid var(--border)}.terminal-header{background:var(--bg-tertiary);padding:10px 14px;display:flex;align-items:center;position:relative;border-bottom:1px solid var(--border)}.terminal-controls{display:flex;gap:8px}.control-btn{width:12px;height:12px;border-radius:50%;border:none;cursor:pointer;transition:filter .2s}.control-btn:hover{filter:brightness(1.2)}.control-btn.close{background:#ff5f56}.control-btn.minimize{background:#ffbd2e}.control-btn.maximize{background:#27c93f}.terminal-title{position:absolute;left:50%;transform:translate(-50%);color:var(--text-dim);font-size:12px;font-weight:500}.terminal-body{padding:16px;color:var(--text);line-height:1.8;max-height:400px;overflow:hidden;transition:max-height .3s ease,padding .3s ease}.terminal-body.collapsed{max-height:0;padding:0 16px}.terminal-line{margin-bottom:8px}.terminal-line.comment{color:#6a9955}.terminal-line.command{color:var(--text)}.prompt{color:#4ec9b0;margin-right:8px;user-select:none}.platform-badges{display:flex;gap:.5rem;flex-wrap:wrap;margin-top:.5rem}.badge{display:inline-block;padding:.25rem .5rem;background:var(--bg-tertiary);border:1px solid var(--border);border-radius:4px;font-size:.75rem;color:var(--text-muted)}.badge.available{border-color:#27c93f;color:#27c93f}.badge.unavailable{border-color:var(--border);color:var(--text-dim)}footer{margin-top:4rem;padding-top:2rem;border-top:1px solid var(--border);text-align:center;color:var(--text-dim);font-size:.85rem}footer a{color:var(--text-muted)}footer a:hover{color:var(--text)}