:root{--bg:#1a1a1a;--surface:#2c2c2c;--surface-2:#333;--surface-3:#444;--text:#d1d1d1;--text-strong:rgba(255,255,255,0.9);--text-muted:rgba(255,255,255,0.6);--link:#a9ccef;--accent:#66b3ff;--accent-soft:rgba(102,179,255,0.2);--accent-border:rgba(102,179,255,0.4);--card:rgba(255,255,255,0.05);--shadow:0 4px 10px rgba(0,0,0,0.2);--header-h:56px;--footer-h:44px;--maxw:900px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;overflow-x:hidden;font-family:Arial,Helvetica,sans-serif;background-color:var(--bg);color:var(--text);display:flex;flex-direction:column;min-height:100vh}a{color:var(--link);text-decoration:none;border-bottom:1px dashed rgba(102,179,255,.6);transition:color .3s ease-in-out,border-bottom-color .3s ease-in-out}a:hover{color:#fff;border-bottom-color:rgba(255,255,255,.8)}a.link{color:var(--link)}a.button{display:inline-block;padding:10px 16px;background:var(--accent-soft);color:#fff;border:1px solid var(--accent-border);border-radius:5px;text-align:center;transition:background .3s ease-in-out,border-color .3s ease-in-out}a.button:hover{background:rgba(102,179,255,.4);border-color:rgba(255,255,255,.8)}.site-header{position:fixed;top:0;left:0;width:100%;background:var(--surface);box-shadow:var(--shadow);z-index:999}.site-main{position:relative;z-index:1;flex:1 0 auto;width:100%;flex-direction:column;padding-top:var(--header-h);padding-bottom:var(--footer-h)}.hero,.site-main{display:flex;align-items:center}.hero{flex:1 1;justify-content:center;text-align:center;min-height:calc(100vh - var(--header-h) - var(--footer-h));padding:24px;opacity:0;animation:fadeIn 1s ease-in-out forwards}.hero-greet{font-size:1.8rem;line-height:1.6}.hero-sub{font-size:1.1rem;line-height:1.6;color:var(--text-muted);margin-top:6px}.plain-content{width:100%;max-width:800px;margin:100px auto;padding:0 20px;text-align:left;opacity:0;animation:fadeIn .8s ease-in-out forwards}.plain-content h1{font-size:2rem;margin-bottom:20px;text-align:center}.plain-content h2{font-size:1.4rem;margin-top:28px;margin-bottom:10px;color:var(--text-strong)}.plain-content h3{font-size:1.15rem;margin-top:22px;margin-bottom:8px;color:var(--text-strong)}.plain-content p{font-size:1.1rem;line-height:1.5;color:rgba(255,255,255,.85);margin-bottom:15px}.plain-content ul{line-height:1.6}.plain-content code{background:var(--card);padding:2px 6px;border-radius:4px;font-family:SFMono-Regular,Consolas,monospace}.plain-content pre{background:var(--card);padding:14px 16px;border-radius:6px;overflow-x:auto;line-height:1.4;font-size:.95rem}.plain-content h4{margin-top:16px;margin-bottom:6px;color:var(--text-strong)}.form-container,.login-form{width:75%;max-width:500px;margin:120px auto 60px;padding:25px;background:var(--card);border-radius:10px;box-shadow:0 6px 15px rgba(0,0,0,.2);display:flex;flex-direction:column;align-items:center;gap:18px;opacity:0;animation:fadeIn .8s ease-in-out forwards}.form-container label,.login-form label{font-size:1rem;color:rgba(255,255,255,.8);font-weight:700;align-self:flex-start}.form-input,.login-input{width:90%;max-width:350px;padding:10px;font-size:1rem;border:1px solid rgba(255,255,255,.3);border-radius:6px;background:transparent;color:#fff;outline:none;transition:border-color .3s ease-in-out,box-shadow .3s ease-in-out}.form-input:focus,.login-input:focus{border-color:var(--accent);box-shadow:0 0 6px rgba(102,179,255,.6)}.form-button,.login-button{width:95%;max-width:360px;padding:12px 16px;background:var(--accent);color:#fff;font-size:1rem;font-weight:700;text-align:center;border:none;border-radius:6px;cursor:pointer;transition:background .3s ease-in-out,transform .2s ease-in-out}.form-button:hover,.login-button:hover{background:#5599dd;transform:scale(1.02)}.form-button:active,.login-button:active{background:#4488cc;transform:scale(.98)}.form-hint{font-size:.9rem;color:var(--text-muted)}.form-error{font-size:.9rem;color:#c0392b}.profile{width:min(560px,90%);margin:40px auto 80px}.profile h2{margin-top:32px}.profile-grid{display:grid;grid-template-columns:max-content 1fr;grid-gap:8px 20px;gap:8px 20px;margin:16px 0 8px}.profile-grid dt{color:var(--text-muted)}.profile-grid dd{margin:0}.profile .form-container{width:100%;margin:8px 0 0}.error-page{text-align:center;margin:140px auto 0;width:100%;max-width:600px;padding:0 20px;opacity:0;animation:fadeIn .8s ease-in-out forwards}.error-page h1{font-size:5rem;font-weight:700;color:rgba(255,255,255,.9);margin-bottom:10px}.error-page p{font-size:1rem;line-height:1.4;color:rgba(255,255,255,.75);margin-bottom:20px}.error-button{display:inline-block;padding:12px 20px;background:#555;color:#fff;border:none;border-radius:5px;transition:background .3s ease-in-out}.error-button:hover{background:#777;color:#fff}.content{width:100%;text-align:left}article{background:var(--card);padding:20px;border-radius:8px;margin-bottom:20px;box-shadow:0 4px 10px rgba(0,0,0,.1)}.meta{text-align:center;font-size:.9rem;color:rgba(255,255,255,.5);margin-bottom:30px}.site-footer{position:fixed;bottom:0;left:0;width:100%;background:var(--surface);text-align:center;padding:12px 0;font-size:.8rem;color:var(--text-muted);box-shadow:0 -2px 10px rgba(0,0,0,.2);z-index:998}@keyframes fadeIn{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}@media 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