:root{--bg: #1b1e23;--panel: #23272e;--panel-2: #2b3038;--text: #e6e8eb;--muted: #9aa3ad;--accent: #4c8bf5;--border: #363b44}*{box-sizing:border-box}html,body{margin:0;height:100%}body{font-family:system-ui,-apple-system,Segoe UI,sans-serif;color:var(--text);background:var(--bg)}#app{display:flex;height:100vh}#controls{width:360px;flex:0 0 320px;background:var(--panel);border-right:1px solid var(--border);overflow-y:auto;padding:16px 18px 32px}.panel-header{display:flex;align-items:stretch;justify-content:space-between;gap:10px}.panel-title{min-width:0}.panel-header h1{margin:0;font-size:22px;letter-spacing:.5px}.panel-header p{margin:2px 0 8px;color:var(--muted);font-size:13px}.panel-title a{color:var(--accent);text-decoration:none}.panel-title a:hover{text-decoration:underline}.header-reset{flex:0 0 auto;align-self:stretch;white-space:nowrap}#controls h2{font-size:12px;text-transform:uppercase;letter-spacing:.8px;color:var(--muted);margin:20px 0 8px;border-bottom:1px solid 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