:root{color-scheme:light;--bg: #eef2f4;--surface: #ffffff;--surface-soft: #f7f9fa;--line: #dbe3e7;--text: #18242b;--muted: #66757d;--accent: #0c7b6b;--accent-strong: #075b50;--warning: #b7791f;--danger: #b84242;--info: #2c6f9f;--shadow: 0 18px 48px rgba(22, 37, 44, .12)}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,Segoe UI,Arial,sans-serif}button,input,select,textarea{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.68}.app-shell{display:grid;grid-template-columns:270px minmax(0,1fr);min-height:100vh}.login-shell{display:grid;place-items:center;min-height:100vh;padding:24px;background:#16252b}.login-panel{width:min(420px,100%);background:var(--surface);border:1px solid var(--line);padding:22px}.center-select-panel{width:min(760px,100%);background:var(--surface);border:1px solid 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