:root{--blue:#2a6fdb;--blue-soft:#e8f0fd;--line:#06c755;--text:#1c1e21;--muted:#6b7280;--border:#e5e7eb;--bg:#f5f6f8;--red:#c62828;--red-soft:#fdecea;--amber-soft:#fff6e0;--green-soft:#e7f6ec}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{color:var(--text);background:var(--bg);font-family:IBM Plex Sans Thai,system-ui,sans-serif;font-size:16px}button,input,textarea{font:inherit}input,textarea{border:1px solid var(--border);background:#fff;border-radius:10px;width:100%;padding:10px 12px}.muted{color:var(--muted)}.small{font-size:13px}.grow{flex:1;min-width:0}.center{text-align:center;flex-direction:column;align-items:center;gap:12px;padding:32px 20px;display:flex}.error-text{color:var(--red);margin:4px 0}.card{border:1px solid 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