body{margin:0}#root{min-height:100svh}:root{--bg:#f8f9fa;--surface:#fff;--border:#e0e0e0;--text:#333;--text-light:#666;--primary:#2563eb;--primary-hover:#1d4ed8;--danger:#dc2626;--danger-hover:#b91c1c;--radius:8px;--shadow:0 2px 8px #0000001a}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Hiragino Sans,Hiragino Kaku Gothic ProN,Meiryo,sans-serif;line-height:1.6}.auth-gate{justify-content:center;align-items:center;min-height:100vh;padding:20px;display:flex}.auth-form{background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow);text-align:center;width:100%;max-width:360px;padding:48px 40px}.auth-form h1{margin-bottom:4px;font-size:1.25rem}.auth-subtitle{color:var(--text-light);margin-bottom:24px;font-size:.9rem}.auth-form input{border:1px solid var(--border);border-radius:var(--radius);width:100%;margin-bottom:12px;padding:10px 14px;font-size:1rem}.auth-form 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