:root{--bg:#0b0d14;--surface:#141824;--surface-2:#1c2130;--border:#2a3145;--text:#e8eaf0;--muted:#99a1b8;--accent:#f5a623;--accent-dim:#b87d1a;--danger:#e5484d;--radius:10px}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.55}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}.container{max-width:1080px;margin:0 auto;padding:0 20px}.site-header{border-bottom:1px solid var(--border);padding:18px 0}.site-header .container{display:flex;align-items:center;justify-content:space-between;gap:16px}.brand{font-weight:700;letter-spacing:.04em;text-transform:uppercase;color:var(--text)}.site-nav{display:flex;gap:20px;font-size:.95rem}.hero{padding:72px 0 48px}.hero h1{font-size:clamp(2rem,5vw,3.2rem);margin:0 0 12px;line-height:1.1}.hero 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11px;font-size:.8rem;color:var(--muted)}.badge.difficulty-easy{color:#4fd18b}.badge.difficulty-medium{color:var(--accent)}.badge.difficulty-hard,.badge.difficulty-medium_hard{color:#ff8f6b}.filters{display:flex;gap:10px;align-items:center;padding:24px 0;flex-wrap:wrap}.empty{color:var(--muted);padding:48px 0}.site-footer{border-top:1px solid var(--border);padding:28px 0;color:var(--muted);font-size:.9rem}.studio-nav{display:flex;gap:4px;flex-wrap:wrap;border-bottom:1px solid var(--border);margin-bottom:28px}.studio-nav a{padding:10px 16px;color:var(--muted);border-bottom:2px solid transparent;margin-bottom:-1px}.studio-nav a:hover{color:var(--text);text-decoration:none}.studio-nav a[aria-current=page]{color:var(--text);border-bottom-color:var(--accent)}.panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:22px;margin-bottom:22px}.panel>h2{margin:0 0 4px;font-size:1.1rem}.panel>.panel-note{color:var(--muted);font-size:.9rem;margin:0 0 18px;max-width:68ch}.field{display:block;margin-bottom:16px;font-size:.9rem}.field>span{display:block;margin-bottom:6px}.field .help{display:block;color:var(--muted);font-size:.82rem;margin-top:5px;max-width:62ch}.field input[type=email],.field input[type=number],.field input[type=text],.field input[type=url],.field select,.field textarea{display:block;width:100%;padding:10px 12px;background:var(--bg);border:1px solid var(--border);border-radius:8px;color:var(--text);font-size:1rem;font-family:inherit}.field textarea{min-height:96px;resize:vertical;line-height:1.5}.field.checkbox{display:flex;align-items:center;gap:9px}.field.checkbox>span{margin:0}.field.mono input,.field.mono textarea{font-family:ui-monospace,SFMono-Regular,Menlo,monospace}.field-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));grid-gap:0 18px;gap:0 18px}.actions{display:flex;gap:10px;flex-wrap:wrap;align-items:center}.button.small{padding:6px 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button:disabled{opacity:.25;cursor:default}.rows{display:flex;flex-direction:column;gap:8px;margin-bottom:18px}.rows .row{display:flex;gap:14px;align-items:flex-start;padding:12px 14px;background:var(--surface-2);border:1px solid var(--border);border-radius:8px}.rows .row>:first-child{flex:1 1;min-width:0}.rows .row p{margin:0}.rows .row .sub{color:var(--muted);font-size:.85rem}.notice{border:1px solid var(--border);border-left:3px solid var(--accent);border-radius:8px;padding:14px 16px;margin-bottom:18px;background:var(--surface-2)}.notice.problem{border-left-color:var(--danger)}.notice h3{margin:0 0 6px;font-size:.95rem}.notice ul{padding-left:20px}.notice p,.notice ul{margin:0;color:var(--muted);font-size:.9rem}.badge.status-published{color:#4fd18b}.badge.status-in_review{color:var(--accent)}.badge.status-archived{color:var(--danger)}